1 | /* $NetBSD: st.c,v 1.230 2016/11/20 15:37:19 mlelstv Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 1998, 2004 The NetBSD Foundation, Inc. |
5 | * All rights reserved. |
6 | * |
7 | * This code is derived from software contributed to The NetBSD Foundation |
8 | * by Charles M. Hannum. |
9 | * |
10 | * Redistribution and use in source and binary forms, with or without |
11 | * modification, are permitted provided that the following conditions |
12 | * are met: |
13 | * 1. Redistributions of source code must retain the above copyright |
14 | * notice, this list of conditions and the following disclaimer. |
15 | * 2. Redistributions in binary form must reproduce the above copyright |
16 | * notice, this list of conditions and the following disclaimer in the |
17 | * documentation and/or other materials provided with the distribution. |
18 | * |
19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
29 | * POSSIBILITY OF SUCH DAMAGE. |
30 | */ |
31 | |
32 | /* |
33 | * Originally written by Julian Elischer (julian@tfs.com) |
34 | * for TRW Financial Systems for use under the MACH(2.5) operating system. |
35 | * |
36 | * TRW Financial Systems, in accordance with their agreement with Carnegie |
37 | * Mellon University, makes this software available to CMU to distribute |
38 | * or use in any manner that they see fit as long as this message is kept with |
39 | * the software. For this reason TFS also grants any other persons or |
40 | * organisations permission to use or modify this software. |
41 | * |
42 | * TFS supplies this software to be publicly redistributed |
43 | * on the understanding that TFS is not responsible for the correct |
44 | * functioning of this software in any circumstances. |
45 | * |
46 | * Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992 |
47 | * major changes by Julian Elischer (julian@jules.dialix.oz.au) May 1993 |
48 | * |
49 | * A lot of rewhacking done by mjacob (mjacob@nas.nasa.gov). |
50 | */ |
51 | |
52 | #include <sys/cdefs.h> |
53 | __KERNEL_RCSID(0, "$NetBSD: st.c,v 1.230 2016/11/20 15:37:19 mlelstv Exp $" ); |
54 | |
55 | #ifdef _KERNEL_OPT |
56 | #include "opt_scsi.h" |
57 | #endif |
58 | |
59 | #include <sys/param.h> |
60 | #include <sys/systm.h> |
61 | #include <sys/fcntl.h> |
62 | #include <sys/errno.h> |
63 | #include <sys/ioctl.h> |
64 | #include <sys/malloc.h> |
65 | #include <sys/buf.h> |
66 | #include <sys/bufq.h> |
67 | #include <sys/proc.h> |
68 | #include <sys/mtio.h> |
69 | #include <sys/device.h> |
70 | #include <sys/conf.h> |
71 | #include <sys/kernel.h> |
72 | #include <sys/vnode.h> |
73 | #include <sys/iostat.h> |
74 | #include <sys/sysctl.h> |
75 | |
76 | #include <dev/scsipi/scsi_spc.h> |
77 | #include <dev/scsipi/scsipi_all.h> |
78 | #include <dev/scsipi/scsi_all.h> |
79 | #include <dev/scsipi/scsi_tape.h> |
80 | #include <dev/scsipi/scsipiconf.h> |
81 | #include <dev/scsipi/scsipi_base.h> |
82 | #include <dev/scsipi/stvar.h> |
83 | |
84 | /* Defines for device specific stuff */ |
85 | #define DEF_FIXED_BSIZE 512 |
86 | |
87 | #define STMODE(z) ( minor(z) & 0x03) |
88 | #define STDSTY(z) ((minor(z) >> 2) & 0x03) |
89 | #define STUNIT(z) ((minor(z) >> 4) ) |
90 | #define STNMINOR 16 |
91 | |
92 | #define NORMAL_MODE 0 |
93 | #define NOREW_MODE 1 |
94 | #define EJECT_MODE 2 |
95 | #define CTRL_MODE 3 |
96 | |
97 | #ifndef ST_MOUNT_DELAY |
98 | #define ST_MOUNT_DELAY 0 |
99 | #endif |
100 | |
101 | static dev_type_open(stopen); |
102 | static dev_type_close(stclose); |
103 | static dev_type_read(stread); |
104 | static dev_type_write(stwrite); |
105 | static dev_type_ioctl(stioctl); |
106 | static dev_type_strategy(ststrategy); |
107 | static dev_type_dump(stdump); |
108 | |
109 | const struct bdevsw st_bdevsw = { |
110 | .d_open = stopen, |
111 | .d_close = stclose, |
112 | .d_strategy = ststrategy, |
113 | .d_ioctl = stioctl, |
114 | .d_dump = stdump, |
115 | .d_psize = nosize, |
116 | .d_discard = nodiscard, |
117 | .d_flag = D_TAPE | D_MPSAFE |
118 | }; |
119 | |
120 | const struct cdevsw st_cdevsw = { |
121 | .d_open = stopen, |
122 | .d_close = stclose, |
123 | .d_read = stread, |
124 | .d_write = stwrite, |
125 | .d_ioctl = stioctl, |
126 | .d_stop = nostop, |
127 | .d_tty = notty, |
128 | .d_poll = nopoll, |
129 | .d_mmap = nommap, |
130 | .d_kqfilter = nokqfilter, |
131 | .d_discard = nodiscard, |
132 | .d_flag = D_TAPE | D_MPSAFE |
133 | }; |
134 | |
135 | /* |
136 | * Define various devices that we know mis-behave in some way, |
137 | * and note how they are bad, so we can correct for them |
138 | */ |
139 | |
140 | static const struct st_quirk_inquiry_pattern st_quirk_patterns[] = { |
141 | {{T_SEQUENTIAL, T_REMOV, |
142 | " " , " " , " " }, {0, 0, { |
143 | {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ |
144 | {ST_Q_FORCE_BLKSIZE, 512, QIC_24}, /* minor 4-7 */ |
145 | {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_1600}, /* minor 8-11 */ |
146 | {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_6250} /* minor 12-15 */ |
147 | }}}, |
148 | {{T_SEQUENTIAL, T_REMOV, |
149 | "TANDBERG" , " TDC 3600 " , "" }, {0, 12, { |
150 | {0, 0, 0}, /* minor 0-3 */ |
151 | {ST_Q_FORCE_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ |
152 | {0, 0, QIC_150}, /* minor 8-11 */ |
153 | {0, 0, QIC_120} /* minor 12-15 */ |
154 | }}}, |
155 | {{T_SEQUENTIAL, T_REMOV, |
156 | "TANDBERG" , " TDC 3800 " , "" }, {0, 0, { |
157 | {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ |
158 | {0, 0, QIC_525}, /* minor 4-7 */ |
159 | {0, 0, QIC_150}, /* minor 8-11 */ |
160 | {0, 0, QIC_120} /* minor 12-15 */ |
161 | }}}, |
162 | {{T_SEQUENTIAL, T_REMOV, |
163 | "TANDBERG" , " SLR5 4/8GB " , "" }, {0, 0, { |
164 | {ST_Q_FORCE_BLKSIZE, 1024, 0}, /* minor 0-3 */ |
165 | {0, 0, 0}, /* minor 4-7 */ |
166 | {0, 0, 0}, /* minor 8-11 */ |
167 | {0, 0, 0} /* minor 12-15 */ |
168 | }}}, |
169 | /* |
170 | * lacking a manual for the 4200, it's not clear what the |
171 | * specific density codes should be- the device is a 2.5GB |
172 | * capable QIC drive, those density codes aren't readily |
173 | * availabel. The 'default' will just have to do. |
174 | */ |
175 | {{T_SEQUENTIAL, T_REMOV, |
176 | "TANDBERG" , " TDC 4200 " , "" }, {0, 0, { |
177 | {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ |
178 | {0, 0, QIC_525}, /* minor 4-7 */ |
179 | {0, 0, QIC_150}, /* minor 8-11 */ |
180 | {0, 0, QIC_120} /* minor 12-15 */ |
181 | }}}, |
182 | /* |
183 | * At least -005 and -007 need this. I'll assume they all do unless I |
184 | * hear otherwise. - mycroft, 31MAR1994 |
185 | */ |
186 | {{T_SEQUENTIAL, T_REMOV, |
187 | "ARCHIVE " , "VIPER 2525 25462" , "" }, {0, 0, { |
188 | {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ |
189 | {ST_Q_SENSE_HELP, 0, QIC_525}, /* minor 4-7 */ |
190 | {0, 0, QIC_150}, /* minor 8-11 */ |
191 | {0, 0, QIC_120} /* minor 12-15 */ |
192 | }}}, |
193 | /* |
194 | * One user reports that this works for his tape drive. It probably |
195 | * needs more work. - mycroft, 09APR1994 |
196 | */ |
197 | {{T_SEQUENTIAL, T_REMOV, |
198 | "SANKYO " , "CP525 " , "" }, {0, 0, { |
199 | {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ |
200 | {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ |
201 | {0, 0, QIC_150}, /* minor 8-11 */ |
202 | {0, 0, QIC_120} /* minor 12-15 */ |
203 | }}}, |
204 | {{T_SEQUENTIAL, T_REMOV, |
205 | "ANRITSU " , "DMT780 " , "" }, {0, 0, { |
206 | {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ |
207 | {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ |
208 | {0, 0, QIC_150}, /* minor 8-11 */ |
209 | {0, 0, QIC_120} /* minor 12-15 */ |
210 | }}}, |
211 | {{T_SEQUENTIAL, T_REMOV, |
212 | "ARCHIVE " , "VIPER 150 21247" , "" }, {ST_Q_ERASE_NOIMM, 12, { |
213 | {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ |
214 | {0, 0, QIC_150}, /* minor 4-7 */ |
215 | {0, 0, QIC_120}, /* minor 8-11 */ |
216 | {0, 0, QIC_24} /* minor 12-15 */ |
217 | }}}, |
218 | {{T_SEQUENTIAL, T_REMOV, |
219 | "ARCHIVE " , "VIPER 150 21531" , "" }, {ST_Q_ERASE_NOIMM, 12, { |
220 | {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ |
221 | {0, 0, QIC_150}, /* minor 4-7 */ |
222 | {0, 0, QIC_120}, /* minor 8-11 */ |
223 | {0, 0, QIC_24} /* minor 12-15 */ |
224 | }}}, |
225 | {{T_SEQUENTIAL, T_REMOV, |
226 | "WANGTEK " , "5099ES SCSI" , "" }, {0, 0, { |
227 | {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ |
228 | {0, 0, QIC_11}, /* minor 4-7 */ |
229 | {0, 0, QIC_24}, /* minor 8-11 */ |
230 | {0, 0, QIC_24} /* minor 12-15 */ |
231 | }}}, |
232 | {{T_SEQUENTIAL, T_REMOV, |
233 | "WANGTEK " , "5150ES SCSI" , "" }, {0, 0, { |
234 | {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ |
235 | {0, 0, QIC_24}, /* minor 4-7 */ |
236 | {0, 0, QIC_120}, /* minor 8-11 */ |
237 | {0, 0, QIC_150} /* minor 12-15 */ |
238 | }}}, |
239 | {{T_SEQUENTIAL, T_REMOV, |
240 | "WANGTEK " , "5525ES SCSI REV7" , "" }, {0, 0, { |
241 | {0, 0, 0}, /* minor 0-3 */ |
242 | {ST_Q_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ |
243 | {0, 0, QIC_150}, /* minor 8-11 */ |
244 | {0, 0, QIC_120} /* minor 12-15 */ |
245 | }}}, |
246 | {{T_SEQUENTIAL, T_REMOV, |
247 | "WangDAT " , "Model 1300 " , "" }, {0, 0, { |
248 | {0, 0, 0}, /* minor 0-3 */ |
249 | {ST_Q_FORCE_BLKSIZE, 512, DDS}, /* minor 4-7 */ |
250 | {ST_Q_FORCE_BLKSIZE, 1024, DDS}, /* minor 8-11 */ |
251 | {ST_Q_FORCE_BLKSIZE, 0, DDS} /* minor 12-15 */ |
252 | }}}, |
253 | {{T_SEQUENTIAL, T_REMOV, |
254 | "EXABYTE " , "EXB-8200 " , "263H" }, {0, 5, { |
255 | {0, 0, 0}, /* minor 0-3 */ |
256 | {0, 0, 0}, /* minor 4-7 */ |
257 | {0, 0, 0}, /* minor 8-11 */ |
258 | {0, 0, 0} /* minor 12-15 */ |
259 | }}}, |
260 | {{T_SEQUENTIAL, T_REMOV, |
261 | "STK" , "9490" , "" }, |
262 | {ST_Q_FORCE_BLKSIZE, 0, { |
263 | {0, 0, 0}, /* minor 0-3 */ |
264 | {0, 0, 0}, /* minor 4-7 */ |
265 | {0, 0, 0}, /* minor 8-11 */ |
266 | {0, 0, 0} /* minor 12-15 */ |
267 | }}}, |
268 | {{T_SEQUENTIAL, T_REMOV, |
269 | "STK" , "SD-3" , "" }, |
270 | {ST_Q_FORCE_BLKSIZE, 0, { |
271 | {0, 0, 0}, /* minor 0-3 */ |
272 | {0, 0, 0}, /* minor 4-7 */ |
273 | {0, 0, 0}, /* minor 8-11 */ |
274 | {0, 0, 0} /* minor 12-15 */ |
275 | }}}, |
276 | {{T_SEQUENTIAL, T_REMOV, |
277 | "IBM" , "03590" , "" }, {ST_Q_IGNORE_LOADS, 0, { |
278 | {0, 0, 0}, /* minor 0-3 */ |
279 | {0, 0, 0}, /* minor 4-7 */ |
280 | {0, 0, 0}, /* minor 8-11 */ |
281 | {0, 0, 0} /* minor 12-15 */ |
282 | }}}, |
283 | {{T_SEQUENTIAL, T_REMOV, |
284 | "HP " , "T4000s " , "" }, {ST_Q_UNIMODAL, 0, { |
285 | {0, 0, QIC_3095}, /* minor 0-3 */ |
286 | {0, 0, QIC_3095}, /* minor 4-7 */ |
287 | {0, 0, QIC_3095}, /* minor 8-11 */ |
288 | {0, 0, QIC_3095}, /* minor 12-15 */ |
289 | }}}, |
290 | #if 0 |
291 | {{T_SEQUENTIAL, T_REMOV, |
292 | "EXABYTE " , "EXB-8200 " , "" }, {0, 12, { |
293 | {0, 0, 0}, /* minor 0-3 */ |
294 | {0, 0, 0}, /* minor 4-7 */ |
295 | {0, 0, 0}, /* minor 8-11 */ |
296 | {0, 0, 0} /* minor 12-15 */ |
297 | }}}, |
298 | #endif |
299 | {{T_SEQUENTIAL, T_REMOV, |
300 | "TEAC " , "MT-2ST/N50 " , "" }, {ST_Q_IGNORE_LOADS, 0, { |
301 | {0, 0, 0}, /* minor 0-3 */ |
302 | {0, 0, 0}, /* minor 4-7 */ |
303 | {0, 0, 0}, /* minor 8-11 */ |
304 | {0, 0, 0} /* minor 12-15 */ |
305 | }}}, |
306 | {{T_SEQUENTIAL, T_REMOV, |
307 | "OnStream" , "ADR50 Drive" , "" }, {ST_Q_UNIMODAL, 0, { |
308 | {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ |
309 | {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 4-7 */ |
310 | {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ |
311 | {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 12-15 */ |
312 | }}}, |
313 | {{T_SEQUENTIAL, T_REMOV, |
314 | "OnStream DI-30" , "" , "1.0" }, {ST_Q_NOFILEMARKS, 0, { |
315 | {0, 0, 0}, /* minor 0-3 */ |
316 | {0, 0, 0}, /* minor 4-7 */ |
317 | {0, 0, 0}, /* minor 8-11 */ |
318 | {0, 0, 0} /* minor 12-15 */ |
319 | }}}, |
320 | {{T_SEQUENTIAL, T_REMOV, |
321 | "NCR H621" , "0-STD-03-46F880 " , "" }, {ST_Q_NOPREVENT, 0, { |
322 | {0, 0, 0}, /* minor 0-3 */ |
323 | {0, 0, 0}, /* minor 4-7 */ |
324 | {0, 0, 0}, /* minor 8-11 */ |
325 | {0, 0, 0} /* minor 12-15 */ |
326 | }}}, |
327 | {{T_SEQUENTIAL, T_REMOV, |
328 | "Seagate STT3401A" , "hp0atxa" , "" }, {0, 0, { |
329 | {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ |
330 | {ST_Q_FORCE_BLKSIZE, 1024, 0}, /* minor 4-7 */ |
331 | {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ |
332 | {ST_Q_FORCE_BLKSIZE, 512, 0} /* minor 12-15 */ |
333 | }}}, |
334 | }; |
335 | |
336 | #define NOEJECT 0 |
337 | #define EJECT 1 |
338 | |
339 | static void st_identify_drive(struct st_softc *, |
340 | struct scsipi_inquiry_pattern *); |
341 | static void st_loadquirks(struct st_softc *); |
342 | static int st_mount_tape(dev_t, int); |
343 | static void st_unmount(struct st_softc *, boolean); |
344 | static int st_decide_mode(struct st_softc *, boolean); |
345 | static void ststart(struct scsipi_periph *); |
346 | static void strestart(void *); |
347 | static void stdone(struct scsipi_xfer *, int); |
348 | static int st_read(struct st_softc *, char *, int, int); |
349 | static int st_space(struct st_softc *, int, u_int, int); |
350 | static int st_write_filemarks(struct st_softc *, int, int); |
351 | static int st_check_eod(struct st_softc *, boolean, int *, int); |
352 | static int st_load(struct st_softc *, u_int, int); |
353 | static int st_rewind(struct st_softc *, u_int, int); |
354 | static int st_interpret_sense(struct scsipi_xfer *); |
355 | static int st_touch_tape(struct st_softc *); |
356 | static int st_erase(struct st_softc *, int full, int flags); |
357 | static int st_rdpos(struct st_softc *, int, uint32_t *); |
358 | static int st_setpos(struct st_softc *, int, uint32_t *); |
359 | |
360 | static const struct scsipi_periphsw st_switch = { |
361 | st_interpret_sense, |
362 | ststart, |
363 | NULL, |
364 | stdone |
365 | }; |
366 | |
367 | #if defined(ST_ENABLE_EARLYWARN) |
368 | #define ST_INIT_FLAGS ST_EARLYWARN |
369 | #else |
370 | #define ST_INIT_FLAGS 0 |
371 | #endif |
372 | |
373 | /* |
374 | * The routine called by the low level scsi routine when it discovers |
375 | * A device suitable for this driver |
376 | */ |
377 | void |
378 | stattach(device_t parent, device_t self, void *aux) |
379 | { |
380 | struct st_softc *st = device_private(self); |
381 | struct scsipibus_attach_args *sa = aux; |
382 | struct scsipi_periph *periph = sa->sa_periph; |
383 | |
384 | SC_DEBUG(periph, SCSIPI_DB2, ("stattach: " )); |
385 | st->sc_dev = self; |
386 | |
387 | /* Store information needed to contact our base driver */ |
388 | st->sc_periph = periph; |
389 | periph->periph_dev = st->sc_dev; |
390 | periph->periph_switch = &st_switch; |
391 | |
392 | /* Set initial flags */ |
393 | st->flags = ST_INIT_FLAGS; |
394 | |
395 | /* Set up the buf queue for this device */ |
396 | bufq_alloc(&st->buf_queue, "fcfs" , 0); |
397 | callout_init(&st->sc_callout, 0); |
398 | |
399 | /* |
400 | * Check if the drive is a known criminal and take |
401 | * Any steps needed to bring it into line |
402 | */ |
403 | st_identify_drive(st, &sa->sa_inqbuf); |
404 | aprint_naive("\n" ); |
405 | aprint_normal("\n" ); |
406 | /* Use the subdriver to request information regarding the drive. */ |
407 | aprint_normal_dev(self, "%s" , st->quirkdata ? "quirks apply, " : "" ); |
408 | if (scsipi_test_unit_ready(periph, |
409 | XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE) || |
410 | st->ops(st, ST_OPS_MODESENSE, |
411 | XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE)) |
412 | aprint_normal("drive empty\n" ); |
413 | else { |
414 | aprint_normal("density code %d, " , st->media_density); |
415 | if (st->media_blksize > 0) |
416 | aprint_normal("%d-byte" , st->media_blksize); |
417 | else |
418 | aprint_normal("variable" ); |
419 | aprint_normal(" blocks, write-%s\n" , |
420 | (st->flags & ST_READONLY) ? "protected" : "enabled" ); |
421 | } |
422 | |
423 | st->stats = iostat_alloc(IOSTAT_TAPE, parent, |
424 | device_xname(st->sc_dev)); |
425 | |
426 | rnd_attach_source(&st->rnd_source, device_xname(st->sc_dev), |
427 | RND_TYPE_TAPE, RND_FLAG_DEFAULT); |
428 | } |
429 | |
430 | int |
431 | stdetach(device_t self, int flags) |
432 | { |
433 | struct st_softc *st = device_private(self); |
434 | struct scsipi_periph *periph = st->sc_periph; |
435 | struct scsipi_channel *chan = periph->periph_channel; |
436 | int bmaj, cmaj, mn; |
437 | |
438 | /* locate the major number */ |
439 | bmaj = bdevsw_lookup_major(&st_bdevsw); |
440 | cmaj = cdevsw_lookup_major(&st_cdevsw); |
441 | |
442 | /* kill any pending restart */ |
443 | callout_stop(&st->sc_callout); |
444 | |
445 | mutex_enter(chan_mtx(chan)); |
446 | |
447 | /* Kill off any queued buffers. */ |
448 | bufq_drain(st->buf_queue); |
449 | |
450 | /* Kill off any pending commands. */ |
451 | scsipi_kill_pending(st->sc_periph); |
452 | |
453 | mutex_exit(chan_mtx(chan)); |
454 | |
455 | bufq_free(st->buf_queue); |
456 | |
457 | /* Nuke the vnodes for any open instances */ |
458 | mn = STUNIT(device_unit(self)); |
459 | vdevgone(bmaj, mn, mn+STNMINOR-1, VBLK); |
460 | vdevgone(cmaj, mn, mn+STNMINOR-1, VCHR); |
461 | |
462 | iostat_free(st->stats); |
463 | |
464 | /* Unhook the entropy source. */ |
465 | rnd_detach_source(&st->rnd_source); |
466 | |
467 | return 0; |
468 | } |
469 | |
470 | /* |
471 | * Use the inquiry routine in 'scsi_base' to get drive info so we can |
472 | * Further tailor our behaviour. |
473 | */ |
474 | static void |
475 | st_identify_drive(struct st_softc *st, struct scsipi_inquiry_pattern *inqbuf) |
476 | { |
477 | const struct st_quirk_inquiry_pattern *finger; |
478 | int priority; |
479 | |
480 | finger = scsipi_inqmatch(inqbuf, |
481 | st_quirk_patterns, |
482 | sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), |
483 | sizeof(st_quirk_patterns[0]), &priority); |
484 | if (priority != 0) { |
485 | st->quirkdata = &finger->quirkdata; |
486 | st->drive_quirks = finger->quirkdata.quirks; |
487 | st->quirks = finger->quirkdata.quirks; /* start value */ |
488 | st->page_0_size = finger->quirkdata.page_0_size; |
489 | KASSERT(st->page_0_size <= MAX_PAGE_0_SIZE); |
490 | st_loadquirks(st); |
491 | } |
492 | } |
493 | |
494 | /* |
495 | * initialise the subdevices to the default (QUIRK) state. |
496 | * this will remove any setting made by the system operator or previous |
497 | * operations. |
498 | */ |
499 | static void |
500 | st_loadquirks(struct st_softc *st) |
501 | { |
502 | const struct modes *mode; |
503 | struct modes *mode2; |
504 | int i; |
505 | |
506 | mode = st->quirkdata->modes; |
507 | mode2 = st->modes; |
508 | for (i = 0; i < 4; i++) { |
509 | memset(mode2, 0, sizeof(struct modes)); |
510 | st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | |
511 | DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | |
512 | DENSITY_SET_BY_USER); |
513 | if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { |
514 | mode2->blksize = mode->blksize; |
515 | st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; |
516 | } |
517 | if (mode->density) { |
518 | mode2->density = mode->density; |
519 | st->modeflags[i] |= DENSITY_SET_BY_QUIRK; |
520 | } |
521 | mode2->quirks |= mode->quirks; |
522 | mode++; |
523 | mode2++; |
524 | } |
525 | } |
526 | |
527 | /* open the device. */ |
528 | static int |
529 | stopen(dev_t dev, int flags, int mode, struct lwp *l) |
530 | { |
531 | u_int stmode, dsty; |
532 | int error, sflags, unit, tries, ntries; |
533 | struct st_softc *st; |
534 | struct scsipi_periph *periph; |
535 | struct scsipi_adapter *adapt; |
536 | |
537 | unit = STUNIT(dev); |
538 | st = device_lookup_private(&st_cd, unit); |
539 | if (st == NULL) |
540 | return ENXIO; |
541 | |
542 | stmode = STMODE(dev); |
543 | dsty = STDSTY(dev); |
544 | |
545 | periph = st->sc_periph; |
546 | adapt = periph->periph_channel->chan_adapter; |
547 | |
548 | SC_DEBUG(periph, SCSIPI_DB1, |
549 | ("open: dev=0x%" PRIx64" (unit %d (of %d))\n" , dev, unit, |
550 | st_cd.cd_ndevs)); |
551 | |
552 | /* Only allow one at a time */ |
553 | if (periph->periph_flags & PERIPH_OPEN) { |
554 | aprint_error_dev(st->sc_dev, "already open\n" ); |
555 | return EBUSY; |
556 | } |
557 | |
558 | if ((error = scsipi_adapter_addref(adapt)) != 0) |
559 | return error; |
560 | |
561 | /* clear any latched errors. */ |
562 | st->mt_resid = 0; |
563 | st->mt_erreg = 0; |
564 | st->asc = 0; |
565 | st->ascq = 0; |
566 | |
567 | /* |
568 | * Catch any unit attention errors. Be silent about this |
569 | * unless we're already mounted. We ignore media change |
570 | * if we're in control mode or not mounted yet. |
571 | */ |
572 | if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { |
573 | #ifdef SCSIDEBUG |
574 | sflags = XS_CTL_IGNORE_MEDIA_CHANGE; |
575 | #else |
576 | sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; |
577 | #endif |
578 | } else |
579 | sflags = 0; |
580 | |
581 | /* |
582 | * If we're already mounted or we aren't configured for |
583 | * a mount delay, only try a test unit ready once. Otherwise, |
584 | * try up to ST_MOUNT_DELAY times with a rest interval of |
585 | * one second between each try. |
586 | */ |
587 | if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) |
588 | ntries = 1; |
589 | else |
590 | ntries = ST_MOUNT_DELAY; |
591 | |
592 | for (error = tries = 0; tries < ntries; tries++) { |
593 | int slpintr, oflags; |
594 | |
595 | /* |
596 | * If we had no error, or we're opening the control mode |
597 | * device, we jump out right away. |
598 | */ |
599 | error = scsipi_test_unit_ready(periph, sflags); |
600 | if (error == 0 || stmode == CTRL_MODE) |
601 | break; |
602 | |
603 | /* |
604 | * We had an error. |
605 | * |
606 | * If we're already mounted or we aren't configured for |
607 | * a mount delay, or the error isn't a NOT READY error, |
608 | * skip to the error exit now. |
609 | */ |
610 | if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || |
611 | (st->mt_key != SKEY_NOT_READY)) { |
612 | goto bad; |
613 | } |
614 | |
615 | /* clear any latched errors. */ |
616 | st->mt_resid = 0; |
617 | st->mt_erreg = 0; |
618 | st->asc = 0; |
619 | st->ascq = 0; |
620 | |
621 | /* |
622 | * Fake that we have the device open so |
623 | * we block other apps from getting in. |
624 | */ |
625 | oflags = periph->periph_flags; |
626 | periph->periph_flags |= PERIPH_OPEN; |
627 | |
628 | slpintr = kpause("stload" , true, hz, NULL); |
629 | |
630 | periph->periph_flags = oflags; /* restore flags */ |
631 | if (slpintr != 0 && slpintr != EWOULDBLOCK) { |
632 | goto bad; |
633 | } |
634 | } |
635 | |
636 | |
637 | /* |
638 | * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has |
639 | * been opened to set defaults and perform other, usually non-I/O |
640 | * related, operations. In this case, do a quick check to see |
641 | * whether the unit actually had a tape loaded (this will be known |
642 | * as to whether or not we got a NOT READY for the above |
643 | * unit attention). If a tape is there, go do a mount sequence. |
644 | */ |
645 | if (stmode == CTRL_MODE && st->mt_key == SKEY_NOT_READY) { |
646 | periph->periph_flags |= PERIPH_OPEN; |
647 | return 0; |
648 | } |
649 | |
650 | /* |
651 | * If we get this far and had an error set, that means we failed |
652 | * to pass the 'test unit ready' test for the non-controlmode device, |
653 | * so we bounce the open. |
654 | */ |
655 | if (error) |
656 | return error; |
657 | |
658 | /* Else, we're now committed to saying we're open. */ |
659 | periph->periph_flags |= PERIPH_OPEN; /* unit attn are now errors */ |
660 | |
661 | /* |
662 | * If it's a different mode, or if the media has been |
663 | * invalidated, unmount the tape from the previous |
664 | * session but continue with open processing |
665 | */ |
666 | if (st->last_dsty != dsty || |
667 | (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) |
668 | st_unmount(st, NOEJECT); |
669 | |
670 | /* |
671 | * If we are not mounted, then we should start a new |
672 | * mount session. |
673 | */ |
674 | if (!(st->flags & ST_MOUNTED)) { |
675 | if ((error = st_mount_tape(dev, flags)) != 0) |
676 | goto bad; |
677 | st->last_dsty = dsty; |
678 | } |
679 | if (!(st->quirks & ST_Q_NOPREVENT)) { |
680 | scsipi_prevent(periph, SPAMR_PREVENT_DT, |
681 | XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); |
682 | } |
683 | |
684 | SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n" )); |
685 | return 0; |
686 | |
687 | bad: |
688 | st_unmount(st, NOEJECT); |
689 | scsipi_adapter_delref(adapt); |
690 | periph->periph_flags &= ~PERIPH_OPEN; |
691 | return error; |
692 | } |
693 | |
694 | static int |
695 | stclose(dev_t dev, int flags, int mode, struct lwp *l) |
696 | { |
697 | int stxx, error = 0; |
698 | struct st_softc *st = device_lookup_private(&st_cd, STUNIT(dev)); |
699 | struct scsipi_periph *periph = st->sc_periph; |
700 | struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; |
701 | |
702 | SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("closing\n" )); |
703 | |
704 | /* |
705 | * Make sure that a tape opened in write-only mode will have |
706 | * file marks written on it when closed, even if not written to. |
707 | * |
708 | * This is for SUN compatibility. Actually, the Sun way of |
709 | * things is to: |
710 | * |
711 | * only write filemarks if there are fmks to be written and |
712 | * - open for write (possibly read/write) |
713 | * - the last operation was a write |
714 | * or: |
715 | * - opened for wronly |
716 | * - no data was written (including filemarks) |
717 | */ |
718 | |
719 | stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); |
720 | if (((flags & FWRITE) && stxx == ST_WRITTEN) || |
721 | ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { |
722 | int nm; |
723 | error = st_check_eod(st, FALSE, &nm, 0); |
724 | } |
725 | |
726 | /* Allow robots to eject tape if needed. */ |
727 | scsipi_prevent(periph, SPAMR_ALLOW, |
728 | XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); |
729 | |
730 | switch (STMODE(dev)) { |
731 | case NORMAL_MODE: |
732 | st_unmount(st, NOEJECT); |
733 | break; |
734 | case NOREW_MODE: |
735 | case CTRL_MODE: |
736 | /* |
737 | * Leave mounted unless media seems to have been removed. |
738 | * |
739 | * Otherwise, if we're to terminate a tape with more than one |
740 | * filemark [ and because we're not rewinding here ], backspace |
741 | * one filemark so that later appends will see an unbroken |
742 | * sequence of: |
743 | * |
744 | * file - FMK - file - FMK ... file - FMK FMK (EOM) |
745 | */ |
746 | if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { |
747 | st_unmount(st, NOEJECT); |
748 | } else if (error == 0) { |
749 | /* |
750 | * ST_WRITTEN was preserved from above. |
751 | * |
752 | * All we need to know here is: |
753 | * |
754 | * Were we writing this tape and was the last |
755 | * operation a write? |
756 | * |
757 | * Are there supposed to be 2FM at EOD? |
758 | * |
759 | * If both statements are true, then we backspace |
760 | * one filemark. |
761 | */ |
762 | stxx |= (st->flags & ST_2FM_AT_EOD); |
763 | if ((flags & FWRITE) != 0 && |
764 | (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { |
765 | error = st_space(st, -1, SP_FILEMARKS, 0); |
766 | } |
767 | } |
768 | break; |
769 | case EJECT_MODE: |
770 | st_unmount(st, EJECT); |
771 | break; |
772 | } |
773 | |
774 | scsipi_wait_drain(periph); |
775 | |
776 | scsipi_adapter_delref(adapt); |
777 | periph->periph_flags &= ~PERIPH_OPEN; |
778 | |
779 | return error; |
780 | } |
781 | |
782 | /* |
783 | * Start a new mount session. |
784 | * Copy in all the default parameters from the selected device mode. |
785 | * and try guess any that seem to be defaulted. |
786 | */ |
787 | static int |
788 | st_mount_tape(dev_t dev, int flags) |
789 | { |
790 | int unit; |
791 | u_int dsty; |
792 | struct st_softc *st; |
793 | struct scsipi_periph *periph; |
794 | int error = 0; |
795 | |
796 | unit = STUNIT(dev); |
797 | dsty = STDSTY(dev); |
798 | st = device_lookup_private(&st_cd, unit); |
799 | periph = st->sc_periph; |
800 | |
801 | if (st->flags & ST_MOUNTED) |
802 | return 0; |
803 | |
804 | SC_DEBUG(periph, SCSIPI_DB1, ("mounting\n " )); |
805 | st->flags |= ST_NEW_MOUNT; |
806 | st->quirks = st->drive_quirks | st->modes[dsty].quirks; |
807 | /* |
808 | * If the media is new, then make sure we give it a chance to |
809 | * to do a 'load' instruction. (We assume it is new.) |
810 | */ |
811 | if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) |
812 | return error; |
813 | /* |
814 | * Throw another dummy instruction to catch |
815 | * 'Unit attention' errors. Many drives give |
816 | * these after doing a Load instruction (with |
817 | * the MEDIUM MAY HAVE CHANGED asc/ascq). |
818 | */ |
819 | scsipi_test_unit_ready(periph, XS_CTL_SILENT); /* XXX */ |
820 | |
821 | /* |
822 | * Some devices can't tell you much until they have been |
823 | * asked to look at the media. This quirk does this. |
824 | */ |
825 | if (st->quirks & ST_Q_SENSE_HELP) |
826 | if ((error = st_touch_tape(st)) != 0) |
827 | return error; |
828 | /* |
829 | * Load the physical device parameters |
830 | * loads: blkmin, blkmax |
831 | */ |
832 | if ((error = st->ops(st, ST_OPS_RBL, 0)) != 0) |
833 | return error; |
834 | /* |
835 | * Load the media dependent parameters |
836 | * includes: media_blksize,media_density,numblks |
837 | * As we have a tape in, it should be reflected here. |
838 | * If not you may need the "quirk" above. |
839 | */ |
840 | if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) |
841 | return error; |
842 | /* |
843 | * If we have gained a permanent density from somewhere, |
844 | * then use it in preference to the one supplied by |
845 | * default by the driver. |
846 | */ |
847 | if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) |
848 | st->density = st->modes[dsty].density; |
849 | else |
850 | st->density = st->media_density; |
851 | /* |
852 | * If we have gained a permanent blocksize |
853 | * then use it in preference to the one supplied by |
854 | * default by the driver. |
855 | */ |
856 | st->flags &= ~ST_FIXEDBLOCKS; |
857 | if (st->modeflags[dsty] & |
858 | (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { |
859 | st->blksize = st->modes[dsty].blksize; |
860 | if (st->blksize) |
861 | st->flags |= ST_FIXEDBLOCKS; |
862 | } else { |
863 | if ((error = st_decide_mode(st, FALSE)) != 0) |
864 | return error; |
865 | } |
866 | if ((error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { |
867 | /* ATAPI will return ENODEV for this, and this may be OK */ |
868 | if (error != ENODEV) { |
869 | aprint_error_dev(st->sc_dev, |
870 | "cannot set selected mode\n" ); |
871 | return error; |
872 | } |
873 | } |
874 | st->flags &= ~ST_NEW_MOUNT; |
875 | st->flags |= ST_MOUNTED; |
876 | periph->periph_flags |= PERIPH_MEDIA_LOADED; /* move earlier? */ |
877 | st->blkno = st->fileno = (daddr_t) 0; |
878 | return 0; |
879 | } |
880 | |
881 | /* |
882 | * End the present mount session. |
883 | * Rewind, and optionally eject the tape. |
884 | * Reset various flags to indicate that all new |
885 | * operations require another mount operation |
886 | */ |
887 | static void |
888 | st_unmount(struct st_softc *st, boolean eject) |
889 | { |
890 | struct scsipi_periph *periph = st->sc_periph; |
891 | int nmarks; |
892 | |
893 | if ((st->flags & ST_MOUNTED) == 0) |
894 | return; |
895 | SC_DEBUG(periph, SCSIPI_DB1, ("unmounting\n" )); |
896 | st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); |
897 | st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); |
898 | |
899 | /* |
900 | * Section 9.3.3 of the SCSI specs states that a device shall return |
901 | * the density value specified in the last succesfull MODE SELECT |
902 | * after an unload operation, in case it is not able to |
903 | * automatically determine the density of the new medium. |
904 | * |
905 | * So we instruct the device to use the default density, which will |
906 | * prevent the use of stale density values (in particular, |
907 | * in st_touch_tape(). |
908 | */ |
909 | st->density = 0; |
910 | if (st->ops(st, ST_OPS_MODESELECT, 0) != 0) { |
911 | aprint_error_dev(st->sc_dev, |
912 | "WARNING: cannot revert to default density\n" ); |
913 | } |
914 | |
915 | if (eject) { |
916 | if (!(st->quirks & ST_Q_NOPREVENT)) { |
917 | scsipi_prevent(periph, SPAMR_ALLOW, |
918 | XS_CTL_IGNORE_ILLEGAL_REQUEST | |
919 | XS_CTL_IGNORE_NOT_READY); |
920 | } |
921 | st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); |
922 | st->blkno = st->fileno = (daddr_t) -1; |
923 | } else { |
924 | st->blkno = st->fileno = (daddr_t) 0; |
925 | } |
926 | st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); |
927 | periph->periph_flags &= ~PERIPH_MEDIA_LOADED; |
928 | } |
929 | |
930 | /* |
931 | * Given all we know about the device, media, mode, 'quirks' and |
932 | * initial operation, make a decision as to how we should be set |
933 | * to run (regarding blocking and EOD marks) |
934 | */ |
935 | int |
936 | st_decide_mode(struct st_softc *st, boolean first_read) |
937 | { |
938 | |
939 | SC_DEBUG(st->sc_periph, SCSIPI_DB2, ("starting block mode decision\n" )); |
940 | |
941 | /* |
942 | * If the drive can only handle fixed-length blocks and only at |
943 | * one size, perhaps we should just do that. |
944 | */ |
945 | if (st->blkmin && (st->blkmin == st->blkmax)) { |
946 | st->flags |= ST_FIXEDBLOCKS; |
947 | st->blksize = st->blkmin; |
948 | SC_DEBUG(st->sc_periph, SCSIPI_DB3, |
949 | ("blkmin == blkmax of %d\n" , st->blkmin)); |
950 | goto done; |
951 | } |
952 | /* |
953 | * If the tape density mandates (or even suggests) use of fixed |
954 | * or variable-length blocks, comply. |
955 | */ |
956 | switch (st->density) { |
957 | case HALFINCH_800: |
958 | case HALFINCH_1600: |
959 | case HALFINCH_6250: |
960 | case DDS: |
961 | st->flags &= ~ST_FIXEDBLOCKS; |
962 | st->blksize = 0; |
963 | SC_DEBUG(st->sc_periph, SCSIPI_DB3, |
964 | ("density specified variable\n" )); |
965 | goto done; |
966 | case QIC_11: |
967 | case QIC_24: |
968 | case QIC_120: |
969 | case QIC_150: |
970 | case QIC_525: |
971 | case QIC_1320: |
972 | case QIC_3095: |
973 | case QIC_3220: |
974 | st->flags |= ST_FIXEDBLOCKS; |
975 | if (st->media_blksize > 0) |
976 | st->blksize = st->media_blksize; |
977 | else |
978 | st->blksize = DEF_FIXED_BSIZE; |
979 | SC_DEBUG(st->sc_periph, SCSIPI_DB3, |
980 | ("density specified fixed\n" )); |
981 | goto done; |
982 | } |
983 | /* |
984 | * If we're about to read the tape, perhaps we should choose |
985 | * fixed or variable-length blocks and block size according to |
986 | * what the drive found on the tape. |
987 | */ |
988 | if (first_read && |
989 | (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || |
990 | (st->media_blksize == DEF_FIXED_BSIZE) || |
991 | (st->media_blksize == 1024))) { |
992 | if (st->media_blksize > 0) |
993 | st->flags |= ST_FIXEDBLOCKS; |
994 | else |
995 | st->flags &= ~ST_FIXEDBLOCKS; |
996 | st->blksize = st->media_blksize; |
997 | SC_DEBUG(st->sc_periph, SCSIPI_DB3, |
998 | ("Used media_blksize of %d\n" , st->media_blksize)); |
999 | goto done; |
1000 | } |
1001 | /* |
1002 | * We're getting no hints from any direction. Choose variable- |
1003 | * length blocks arbitrarily. |
1004 | */ |
1005 | st->flags &= ~ST_FIXEDBLOCKS; |
1006 | st->blksize = 0; |
1007 | SC_DEBUG(st->sc_periph, SCSIPI_DB3, |
1008 | ("Give up and default to variable mode\n" )); |
1009 | |
1010 | done: |
1011 | /* |
1012 | * Decide whether or not to write two file marks to signify end- |
1013 | * of-data. Make the decision as a function of density. If |
1014 | * the decision is not to use a second file mark, the SCSI BLANK |
1015 | * CHECK condition code will be recognized as end-of-data when |
1016 | * first read. |
1017 | * (I think this should be a by-product of fixed/variable..julian) |
1018 | */ |
1019 | switch (st->density) { |
1020 | /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ |
1021 | case QIC_11: |
1022 | case QIC_24: |
1023 | case QIC_120: |
1024 | case QIC_150: |
1025 | case QIC_525: |
1026 | case QIC_1320: |
1027 | case QIC_3095: |
1028 | case QIC_3220: |
1029 | st->flags &= ~ST_2FM_AT_EOD; |
1030 | break; |
1031 | default: |
1032 | st->flags |= ST_2FM_AT_EOD; |
1033 | } |
1034 | return 0; |
1035 | } |
1036 | |
1037 | /* |
1038 | * Actually translate the requested transfer into |
1039 | * one the physical driver can understand |
1040 | * The transfer is described by a buf and will include |
1041 | * only one physical transfer. |
1042 | */ |
1043 | static void |
1044 | ststrategy(struct buf *bp) |
1045 | { |
1046 | struct st_softc *st = device_lookup_private(&st_cd, STUNIT(bp->b_dev)); |
1047 | struct scsipi_periph *periph = st->sc_periph; |
1048 | struct scsipi_channel *chan = periph->periph_channel; |
1049 | |
1050 | SC_DEBUG(periph, SCSIPI_DB1, |
1051 | ("ststrategy %d bytes @ blk %" PRId64 "\n" , bp->b_bcount, |
1052 | bp->b_blkno)); |
1053 | /* If it's a null transfer, return immediately */ |
1054 | if (bp->b_bcount == 0) |
1055 | goto abort; |
1056 | |
1057 | /* If offset is negative, error */ |
1058 | if (bp->b_blkno < 0) { |
1059 | bp->b_error = EINVAL; |
1060 | goto abort; |
1061 | } |
1062 | |
1063 | /* Odd sized request on fixed drives are verboten */ |
1064 | if (st->flags & ST_FIXEDBLOCKS) { |
1065 | if (bp->b_bcount % st->blksize) { |
1066 | aprint_error_dev(st->sc_dev, "bad request, must be multiple of %d\n" , |
1067 | st->blksize); |
1068 | bp->b_error = EIO; |
1069 | goto abort; |
1070 | } |
1071 | } |
1072 | /* as are out-of-range requests on variable drives. */ |
1073 | else if (bp->b_bcount < st->blkmin || |
1074 | (st->blkmax && bp->b_bcount > st->blkmax)) { |
1075 | aprint_error_dev(st->sc_dev, "bad request, must be between %d and %d\n" , |
1076 | st->blkmin, st->blkmax); |
1077 | bp->b_error = EIO; |
1078 | goto abort; |
1079 | } |
1080 | mutex_enter(chan_mtx(chan)); |
1081 | |
1082 | /* |
1083 | * Place it in the queue of activities for this tape |
1084 | * at the end (a bit silly because we only have on user.. |
1085 | * (but it could fork())) |
1086 | */ |
1087 | bufq_put(st->buf_queue, bp); |
1088 | |
1089 | /* |
1090 | * Tell the device to get going on the transfer if it's |
1091 | * not doing anything, otherwise just wait for completion |
1092 | * (All a bit silly if we're only allowing 1 open but..) |
1093 | */ |
1094 | ststart(periph); |
1095 | |
1096 | mutex_exit(chan_mtx(chan)); |
1097 | return; |
1098 | abort: |
1099 | /* |
1100 | * Reset the residue because we didn't do anything, |
1101 | * and send the buffer back as done. |
1102 | */ |
1103 | bp->b_resid = bp->b_bcount; |
1104 | biodone(bp); |
1105 | return; |
1106 | } |
1107 | |
1108 | /* |
1109 | * ststart looks to see if there is a buf waiting for the device |
1110 | * and that the device is not already busy. If both are true, |
1111 | * It dequeues the buf and creates a scsi command to perform the |
1112 | * transfer required. The transfer request will call scsipi_done |
1113 | * on completion, which will in turn call this routine again |
1114 | * so that the next queued transfer is performed. |
1115 | * The bufs are queued by the strategy routine (ststrategy) |
1116 | * |
1117 | * This routine is also called after other non-queued requests |
1118 | * have been made of the scsi driver, to ensure that the queue |
1119 | * continues to be drained. |
1120 | * ststart() is called with channel lock held |
1121 | */ |
1122 | static void |
1123 | ststart(struct scsipi_periph *periph) |
1124 | { |
1125 | struct st_softc *st = device_private(periph->periph_dev); |
1126 | struct buf *bp; |
1127 | struct scsi_rw_tape cmd; |
1128 | struct scsipi_xfer *xs; |
1129 | int flags, error __diagused; |
1130 | |
1131 | SC_DEBUG(periph, SCSIPI_DB2, ("ststart " )); |
1132 | /* See if there is a buf to do and we are not already doing one */ |
1133 | while (periph->periph_active < periph->periph_openings) { |
1134 | /* if a special awaits, let it proceed first */ |
1135 | if (periph->periph_flags & PERIPH_WAITING) { |
1136 | periph->periph_flags &= ~PERIPH_WAITING; |
1137 | cv_broadcast(periph_cv_periph(periph)); |
1138 | return; |
1139 | } |
1140 | |
1141 | /* |
1142 | * If the device has been unmounted by the user |
1143 | * then throw away all requests until done. |
1144 | */ |
1145 | if (__predict_false((st->flags & ST_MOUNTED) == 0 || |
1146 | (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0)) { |
1147 | if ((bp = bufq_get(st->buf_queue)) != NULL) { |
1148 | /* make sure that one implies the other.. */ |
1149 | periph->periph_flags &= ~PERIPH_MEDIA_LOADED; |
1150 | bp->b_error = EIO; |
1151 | bp->b_resid = bp->b_bcount; |
1152 | biodone(bp); |
1153 | continue; |
1154 | } else |
1155 | return; |
1156 | } |
1157 | |
1158 | if ((bp = bufq_peek(st->buf_queue)) == NULL) |
1159 | return; |
1160 | |
1161 | iostat_busy(st->stats); |
1162 | |
1163 | /* |
1164 | * only FIXEDBLOCK devices have pending I/O or space operations. |
1165 | */ |
1166 | if (st->flags & ST_FIXEDBLOCKS) { |
1167 | /* |
1168 | * If we are at a filemark but have not reported it yet |
1169 | * then we should report it now |
1170 | */ |
1171 | if (st->flags & ST_AT_FILEMARK) { |
1172 | if ((bp->b_flags & B_READ) == B_WRITE) { |
1173 | /* |
1174 | * Handling of ST_AT_FILEMARK in |
1175 | * st_space will fill in the right file |
1176 | * mark count. |
1177 | * Back up over filemark |
1178 | */ |
1179 | if (st_space(st, 0, SP_FILEMARKS, 0)) { |
1180 | bufq_get(st->buf_queue); |
1181 | bp->b_error = EIO; |
1182 | bp->b_resid = bp->b_bcount; |
1183 | biodone(bp); |
1184 | continue; |
1185 | } |
1186 | } else { |
1187 | bufq_get(st->buf_queue); |
1188 | bp->b_resid = bp->b_bcount; |
1189 | bp->b_error = 0; |
1190 | st->flags &= ~ST_AT_FILEMARK; |
1191 | biodone(bp); |
1192 | continue; /* seek more work */ |
1193 | } |
1194 | } |
1195 | } |
1196 | /* |
1197 | * If we are at EOM but have not reported it |
1198 | * yet then we should report it now. |
1199 | */ |
1200 | if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { |
1201 | bufq_get(st->buf_queue); |
1202 | bp->b_resid = bp->b_bcount; |
1203 | if (st->flags & ST_EIO_PENDING) |
1204 | bp->b_error = EIO; |
1205 | st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); |
1206 | biodone(bp); |
1207 | continue; /* seek more work */ |
1208 | } |
1209 | |
1210 | /* Fill out the scsi command */ |
1211 | memset(&cmd, 0, sizeof(cmd)); |
1212 | flags = XS_CTL_NOSLEEP | XS_CTL_ASYNC; |
1213 | if ((bp->b_flags & B_READ) == B_WRITE) { |
1214 | cmd.opcode = WRITE; |
1215 | st->flags &= ~ST_FM_WRITTEN; |
1216 | flags |= XS_CTL_DATA_OUT; |
1217 | } else { |
1218 | cmd.opcode = READ; |
1219 | flags |= XS_CTL_DATA_IN; |
1220 | } |
1221 | |
1222 | /* |
1223 | * Handle "fixed-block-mode" tape drives by using the |
1224 | * block count instead of the length. |
1225 | */ |
1226 | if (st->flags & ST_FIXEDBLOCKS) { |
1227 | cmd.byte2 |= SRW_FIXED; |
1228 | _lto3b(bp->b_bcount / st->blksize, cmd.len); |
1229 | } else |
1230 | _lto3b(bp->b_bcount, cmd.len); |
1231 | |
1232 | /* Clear 'position updated' indicator */ |
1233 | st->flags &= ~ST_POSUPDATED; |
1234 | |
1235 | /* go ask the adapter to do all this for us */ |
1236 | xs = scsipi_make_xs_locked(periph, |
1237 | (struct scsipi_generic *)&cmd, sizeof(cmd), |
1238 | (u_char *)bp->b_data, bp->b_bcount, |
1239 | 0, ST_IO_TIME, bp, flags); |
1240 | if (__predict_false(xs == NULL)) { |
1241 | /* |
1242 | * out of memory. Keep this buffer in the queue, and |
1243 | * retry later. |
1244 | */ |
1245 | callout_reset(&st->sc_callout, hz / 2, strestart, |
1246 | periph); |
1247 | return; |
1248 | } |
1249 | /* |
1250 | * need to dequeue the buffer before queuing the command, |
1251 | * because cdstart may be called recursively from the |
1252 | * HBA driver |
1253 | */ |
1254 | #ifdef DIAGNOSTIC |
1255 | if (bufq_get(st->buf_queue) != bp) |
1256 | panic("ststart(): dequeued wrong buf" ); |
1257 | #else |
1258 | bufq_get(st->buf_queue); |
1259 | #endif |
1260 | error = scsipi_execute_xs(xs); |
1261 | /* with a scsipi_xfer preallocated, scsipi_command can't fail */ |
1262 | KASSERT(error == 0); |
1263 | } /* go back and see if we can cram more work in.. */ |
1264 | } |
1265 | |
1266 | static void |
1267 | strestart(void *v) |
1268 | { |
1269 | struct scsipi_periph *periph = (struct scsipi_periph *)v; |
1270 | struct scsipi_channel *chan = periph->periph_channel; |
1271 | |
1272 | mutex_enter(chan_mtx(chan)); |
1273 | ststart((struct scsipi_periph *)v); |
1274 | mutex_exit(chan_mtx(chan)); |
1275 | } |
1276 | |
1277 | static void |
1278 | stdone(struct scsipi_xfer *xs, int error) |
1279 | { |
1280 | struct st_softc *st = device_private(xs->xs_periph->periph_dev); |
1281 | struct buf *bp = xs->bp; |
1282 | |
1283 | if (bp) { |
1284 | bp->b_error = error; |
1285 | bp->b_resid = xs->resid; |
1286 | /* |
1287 | * buggy device ? A SDLT320 can report an info |
1288 | * field of 0x3de8000 on a Media Error/Write Error |
1289 | * for this CBD: 0x0a 00 00 80 00 00 |
1290 | */ |
1291 | if (bp->b_resid > bp->b_bcount || bp->b_resid < 0) |
1292 | bp->b_resid = bp->b_bcount; |
1293 | |
1294 | if ((bp->b_flags & B_READ) == B_WRITE) |
1295 | st->flags |= ST_WRITTEN; |
1296 | else |
1297 | st->flags &= ~ST_WRITTEN; |
1298 | |
1299 | iostat_unbusy(st->stats, bp->b_bcount, |
1300 | ((bp->b_flags & B_READ) == B_READ)); |
1301 | |
1302 | rnd_add_uint32(&st->rnd_source, bp->b_blkno); |
1303 | |
1304 | if ((st->flags & ST_POSUPDATED) == 0) { |
1305 | if (error) { |
1306 | st->fileno = st->blkno = -1; |
1307 | } else if (st->blkno != -1) { |
1308 | if (st->flags & ST_FIXEDBLOCKS) |
1309 | st->blkno += |
1310 | (bp->b_bcount / st->blksize); |
1311 | else |
1312 | st->blkno++; |
1313 | } |
1314 | } |
1315 | biodone(bp); |
1316 | } |
1317 | } |
1318 | |
1319 | static int |
1320 | stread(dev_t dev, struct uio *uio, int iomode) |
1321 | { |
1322 | struct st_softc *st = device_lookup_private(&st_cd, STUNIT(dev)); |
1323 | |
1324 | return physio(ststrategy, NULL, dev, B_READ, |
1325 | st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio); |
1326 | } |
1327 | |
1328 | static int |
1329 | stwrite(dev_t dev, struct uio *uio, int iomode) |
1330 | { |
1331 | struct st_softc *st = device_lookup_private(&st_cd, STUNIT(dev)); |
1332 | |
1333 | return physio(ststrategy, NULL, dev, B_WRITE, |
1334 | st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio); |
1335 | } |
1336 | |
1337 | /* |
1338 | * Perform special action on behalf of the user; |
1339 | * knows about the internals of this device |
1340 | */ |
1341 | static int |
1342 | stioctl(dev_t dev, u_long cmd, void *arg, int flag, struct lwp *l) |
1343 | { |
1344 | int error = 0; |
1345 | int unit; |
1346 | int number, nmarks, dsty; |
1347 | int flags; |
1348 | struct st_softc *st; |
1349 | int hold_blksize; |
1350 | uint8_t hold_density; |
1351 | struct mtop *mt = (struct mtop *) arg; |
1352 | |
1353 | /* Find the device that the user is talking about */ |
1354 | flags = 0; /* give error messages, act on errors etc. */ |
1355 | unit = STUNIT(dev); |
1356 | dsty = STDSTY(dev); |
1357 | st = device_lookup_private(&st_cd, unit); |
1358 | hold_blksize = st->blksize; |
1359 | hold_density = st->density; |
1360 | |
1361 | switch ((u_int)cmd) { |
1362 | case MTIOCGET: { |
1363 | struct mtget *g = (struct mtget *) arg; |
1364 | /* |
1365 | * (to get the current state of READONLY) |
1366 | */ |
1367 | error = st->ops(st, ST_OPS_MODESENSE, XS_CTL_SILENT); |
1368 | if (error) { |
1369 | /* |
1370 | * Ignore the error if in control mode; |
1371 | * this is mandated by st(4). |
1372 | */ |
1373 | if (STMODE(dev) != CTRL_MODE) |
1374 | break; |
1375 | error = 0; |
1376 | } |
1377 | SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[ioctl: get status]\n" )); |
1378 | memset(g, 0, sizeof(struct mtget)); |
1379 | g->mt_type = MT_ISAR; /* Ultrix compat *//*? */ |
1380 | g->mt_blksiz = st->blksize; |
1381 | g->mt_density = st->density; |
1382 | g->mt_mblksiz[0] = st->modes[0].blksize; |
1383 | g->mt_mblksiz[1] = st->modes[1].blksize; |
1384 | g->mt_mblksiz[2] = st->modes[2].blksize; |
1385 | g->mt_mblksiz[3] = st->modes[3].blksize; |
1386 | g->mt_mdensity[0] = st->modes[0].density; |
1387 | g->mt_mdensity[1] = st->modes[1].density; |
1388 | g->mt_mdensity[2] = st->modes[2].density; |
1389 | g->mt_mdensity[3] = st->modes[3].density; |
1390 | g->mt_fileno = st->fileno; |
1391 | g->mt_blkno = st->blkno; |
1392 | if (st->flags & ST_READONLY) |
1393 | g->mt_dsreg |= MT_DS_RDONLY; |
1394 | if (st->flags & ST_MOUNTED) |
1395 | g->mt_dsreg |= MT_DS_MOUNTED; |
1396 | g->mt_resid = st->mt_resid; |
1397 | g->mt_erreg = st->mt_erreg; |
1398 | /* |
1399 | * clear latched errors. |
1400 | */ |
1401 | st->mt_resid = 0; |
1402 | st->mt_erreg = 0; |
1403 | st->asc = 0; |
1404 | st->ascq = 0; |
1405 | break; |
1406 | } |
1407 | case MTIOCTOP: { |
1408 | SC_DEBUG(st->sc_periph, SCSIPI_DB1, |
1409 | ("[ioctl: op=0x%x count=0x%x]\n" , mt->mt_op, |
1410 | mt->mt_count)); |
1411 | |
1412 | /* compat: in U*x it is a short */ |
1413 | number = mt->mt_count; |
1414 | switch ((short) (mt->mt_op)) { |
1415 | case MTWEOF: /* write an end-of-file record */ |
1416 | error = st_write_filemarks(st, number, flags); |
1417 | break; |
1418 | case MTBSF: /* backward space file */ |
1419 | number = -number; |
1420 | case MTFSF: /* forward space file */ |
1421 | error = st_check_eod(st, FALSE, &nmarks, flags); |
1422 | if (!error) |
1423 | error = st_space(st, number - nmarks, |
1424 | SP_FILEMARKS, flags); |
1425 | break; |
1426 | case MTBSR: /* backward space record */ |
1427 | number = -number; |
1428 | case MTFSR: /* forward space record */ |
1429 | error = st_check_eod(st, true, &nmarks, flags); |
1430 | if (!error) |
1431 | error = st_space(st, number, SP_BLKS, flags); |
1432 | break; |
1433 | case MTREW: /* rewind */ |
1434 | error = st_rewind(st, 0, flags); |
1435 | break; |
1436 | case MTOFFL: /* rewind and put the drive offline */ |
1437 | st_unmount(st, EJECT); |
1438 | break; |
1439 | case MTNOP: /* no operation, sets status only */ |
1440 | break; |
1441 | case MTRETEN: /* retension the tape */ |
1442 | error = st_load(st, LD_RETENSION, flags); |
1443 | if (!error) |
1444 | error = st_load(st, LD_LOAD, flags); |
1445 | break; |
1446 | case MTEOM: /* forward space to end of media */ |
1447 | error = st_check_eod(st, FALSE, &nmarks, flags); |
1448 | if (!error) |
1449 | error = st_space(st, 1, SP_EOM, flags); |
1450 | break; |
1451 | case MTCACHE: /* enable controller cache */ |
1452 | st->flags &= ~ST_DONTBUFFER; |
1453 | goto try_new_value; |
1454 | case MTNOCACHE: /* disable controller cache */ |
1455 | st->flags |= ST_DONTBUFFER; |
1456 | goto try_new_value; |
1457 | case MTERASE: /* erase volume */ |
1458 | error = st_erase(st, number, flags); |
1459 | break; |
1460 | case MTSETBSIZ: /* Set block size for device */ |
1461 | #ifdef NOTYET |
1462 | if (!(st->flags & ST_NEW_MOUNT)) { |
1463 | uprintf("re-mount tape before changing " |
1464 | "blocksize" ); |
1465 | error = EINVAL; |
1466 | break; |
1467 | } |
1468 | #endif |
1469 | if (number == 0) |
1470 | st->flags &= ~ST_FIXEDBLOCKS; |
1471 | else { |
1472 | if ((st->blkmin || st->blkmax) && |
1473 | (number < st->blkmin || |
1474 | number > st->blkmax)) { |
1475 | error = EINVAL; |
1476 | break; |
1477 | } |
1478 | st->flags |= ST_FIXEDBLOCKS; |
1479 | } |
1480 | st->blksize = number; |
1481 | st->flags |= ST_BLOCK_SET; /*XXX */ |
1482 | goto try_new_value; |
1483 | case MTSETDNSTY: /* Set density for device and mode */ |
1484 | /* |
1485 | * Any number >= 0 and <= 0xff is legal. Numbers |
1486 | * above 0x80 are 'vendor unique'. |
1487 | */ |
1488 | if (number < 0 || number > 255) { |
1489 | error = EINVAL; |
1490 | break; |
1491 | } else |
1492 | st->density = number; |
1493 | goto try_new_value; |
1494 | case MTCMPRESS: |
1495 | error = st->ops(st, (number == 0) ? |
1496 | ST_OPS_CMPRSS_OFF : ST_OPS_CMPRSS_ON, |
1497 | XS_CTL_SILENT); |
1498 | break; |
1499 | case MTEWARN: |
1500 | if (number) |
1501 | st->flags |= ST_EARLYWARN; |
1502 | else |
1503 | st->flags &= ~ST_EARLYWARN; |
1504 | break; |
1505 | |
1506 | default: |
1507 | error = EINVAL; |
1508 | } |
1509 | break; |
1510 | } |
1511 | case MTIOCIEOT: |
1512 | case MTIOCEEOT: |
1513 | break; |
1514 | case MTIOCRDSPOS: |
1515 | error = st_rdpos(st, 0, (uint32_t *)arg); |
1516 | break; |
1517 | case MTIOCRDHPOS: |
1518 | error = st_rdpos(st, 1, (uint32_t *)arg); |
1519 | break; |
1520 | case MTIOCSLOCATE: |
1521 | error = st_setpos(st, 0, (uint32_t *)arg); |
1522 | break; |
1523 | case MTIOCHLOCATE: |
1524 | error = st_setpos(st, 1, (uint32_t *)arg); |
1525 | break; |
1526 | default: |
1527 | error = scsipi_do_ioctl(st->sc_periph, dev, cmd, arg, flag, l); |
1528 | break; |
1529 | } |
1530 | return error; |
1531 | |
1532 | try_new_value: |
1533 | /* |
1534 | * Check that the mode being asked for is aggreeable to the |
1535 | * drive. If not, put it back the way it was. |
1536 | * |
1537 | * If in control mode, we can make (persistent) mode changes |
1538 | * even if no medium is loaded (see st(4)). |
1539 | */ |
1540 | if ((STMODE(dev) != CTRL_MODE || (st->flags & ST_MOUNTED) != 0) && |
1541 | (error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { |
1542 | /* put it back as it was */ |
1543 | aprint_error_dev(st->sc_dev, "cannot set selected mode\n" ); |
1544 | st->density = hold_density; |
1545 | st->blksize = hold_blksize; |
1546 | if (st->blksize) |
1547 | st->flags |= ST_FIXEDBLOCKS; |
1548 | else |
1549 | st->flags &= ~ST_FIXEDBLOCKS; |
1550 | return error; |
1551 | } |
1552 | /* |
1553 | * As the drive liked it, if we are setting a new default, |
1554 | * set it into the structures as such. |
1555 | * |
1556 | * The means for deciding this are not finalised yet- but |
1557 | * if the device was opened in Control Mode, the values |
1558 | * are persistent now across mounts. |
1559 | */ |
1560 | if (STMODE(dev) == CTRL_MODE) { |
1561 | switch ((short) (mt->mt_op)) { |
1562 | case MTSETBSIZ: |
1563 | st->modes[dsty].blksize = st->blksize; |
1564 | st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; |
1565 | break; |
1566 | case MTSETDNSTY: |
1567 | st->modes[dsty].density = st->density; |
1568 | st->modeflags[dsty] |= DENSITY_SET_BY_USER; |
1569 | break; |
1570 | } |
1571 | } |
1572 | return 0; |
1573 | } |
1574 | |
1575 | /* Do a synchronous read. */ |
1576 | static int |
1577 | st_read(struct st_softc *st, char *bf, int size, int flags) |
1578 | { |
1579 | struct scsi_rw_tape cmd; |
1580 | |
1581 | /* If it's a null transfer, return immediatly */ |
1582 | if (size == 0) |
1583 | return 0; |
1584 | memset(&cmd, 0, sizeof(cmd)); |
1585 | cmd.opcode = READ; |
1586 | if (st->flags & ST_FIXEDBLOCKS) { |
1587 | cmd.byte2 |= SRW_FIXED; |
1588 | _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), |
1589 | cmd.len); |
1590 | } else |
1591 | _lto3b(size, cmd.len); |
1592 | return scsipi_command(st->sc_periph, |
1593 | (void *)&cmd, sizeof(cmd), (void *)bf, size, 0, ST_IO_TIME, NULL, |
1594 | flags | XS_CTL_DATA_IN); |
1595 | } |
1596 | |
1597 | /* issue an erase command */ |
1598 | static int |
1599 | st_erase(struct st_softc *st, int full, int flags) |
1600 | { |
1601 | int tmo; |
1602 | struct scsi_erase cmd; |
1603 | |
1604 | /* |
1605 | * Full erase means set LONG bit in erase command, which asks |
1606 | * the drive to erase the entire unit. Without this bit, we're |
1607 | * asking the drive to write an erase gap. |
1608 | */ |
1609 | memset(&cmd, 0, sizeof(cmd)); |
1610 | cmd.opcode = ERASE; |
1611 | if (full) { |
1612 | cmd.byte2 = SE_LONG; |
1613 | tmo = ST_SPC_TIME; |
1614 | } else |
1615 | tmo = ST_IO_TIME; |
1616 | |
1617 | /* |
1618 | * XXX We always do this asynchronously, for now, unless the device |
1619 | * has the ST_Q_ERASE_NOIMM quirk. How long should we wait if we |
1620 | * want to (eventually) to it synchronously? |
1621 | */ |
1622 | if ((st->quirks & ST_Q_ERASE_NOIMM) == 0) |
1623 | cmd.byte2 |= SE_IMMED; |
1624 | |
1625 | return scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, |
1626 | ST_RETRIES, tmo, NULL, flags); |
1627 | } |
1628 | |
1629 | /* skip N blocks/filemarks/seq filemarks/eom */ |
1630 | static int |
1631 | st_space(struct st_softc *st, int number, u_int what, int flags) |
1632 | { |
1633 | struct scsi_space cmd; |
1634 | int error; |
1635 | |
1636 | switch (what) { |
1637 | case SP_BLKS: |
1638 | if (st->flags & ST_PER_ACTION) { |
1639 | if (number > 0) { |
1640 | st->flags &= ~ST_PER_ACTION; |
1641 | return EIO; |
1642 | } else if (number < 0) { |
1643 | if (st->flags & ST_AT_FILEMARK) { |
1644 | /* |
1645 | * Handling of ST_AT_FILEMARK |
1646 | * in st_space will fill in the |
1647 | * right file mark count. |
1648 | */ |
1649 | error = st_space(st, 0, SP_FILEMARKS, |
1650 | flags); |
1651 | if (error) |
1652 | return error; |
1653 | } |
1654 | if (st->flags & ST_BLANK_READ) { |
1655 | st->flags &= ~ST_BLANK_READ; |
1656 | return EIO; |
1657 | } |
1658 | st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); |
1659 | } |
1660 | } |
1661 | break; |
1662 | case SP_FILEMARKS: |
1663 | if (st->flags & ST_EIO_PENDING) { |
1664 | if (number > 0) { |
1665 | /* pretend we just discovered the error */ |
1666 | st->flags &= ~ST_EIO_PENDING; |
1667 | return EIO; |
1668 | } else if (number < 0) { |
1669 | /* back away from the error */ |
1670 | st->flags &= ~ST_EIO_PENDING; |
1671 | } |
1672 | } |
1673 | if (st->flags & ST_AT_FILEMARK) { |
1674 | st->flags &= ~ST_AT_FILEMARK; |
1675 | number--; |
1676 | } |
1677 | if ((st->flags & ST_BLANK_READ) && (number < 0)) { |
1678 | /* back away from unwritten tape */ |
1679 | st->flags &= ~ST_BLANK_READ; |
1680 | number++; /* XXX dubious */ |
1681 | } |
1682 | break; |
1683 | case SP_EOM: |
1684 | if (st->flags & ST_EOM_PENDING) { |
1685 | /* we're already there */ |
1686 | st->flags &= ~ST_EOM_PENDING; |
1687 | return 0; |
1688 | } |
1689 | if (st->flags & ST_EIO_PENDING) { |
1690 | /* pretend we just discovered the error */ |
1691 | st->flags &= ~ST_EIO_PENDING; |
1692 | return EIO; |
1693 | } |
1694 | if (st->flags & ST_AT_FILEMARK) |
1695 | st->flags &= ~ST_AT_FILEMARK; |
1696 | break; |
1697 | } |
1698 | if (number == 0) |
1699 | return 0; |
1700 | |
1701 | memset(&cmd, 0, sizeof(cmd)); |
1702 | cmd.opcode = SPACE; |
1703 | cmd.byte2 = what; |
1704 | _lto3b(number, cmd.number); |
1705 | |
1706 | st->flags &= ~ST_POSUPDATED; |
1707 | st->last_ctl_resid = 0; |
1708 | error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, |
1709 | 0, ST_SPC_TIME, NULL, flags); |
1710 | |
1711 | if (error == 0 && (st->flags & ST_POSUPDATED) == 0) { |
1712 | number = number - st->last_ctl_resid; |
1713 | if (what == SP_BLKS) { |
1714 | if (st->blkno != -1) |
1715 | st->blkno += number; |
1716 | } else if (what == SP_FILEMARKS) { |
1717 | if (st->fileno != -1) { |
1718 | st->fileno += number; |
1719 | if (number > 0) |
1720 | st->blkno = 0; |
1721 | else if (number < 0) |
1722 | st->blkno = -1; |
1723 | } |
1724 | } else if (what == SP_EOM) { |
1725 | /* This loses us relative position. */ |
1726 | st->fileno = st->blkno = -1; |
1727 | } |
1728 | } |
1729 | return error; |
1730 | } |
1731 | |
1732 | /* |
1733 | * write N filemarks |
1734 | */ |
1735 | static int |
1736 | st_write_filemarks(struct st_softc *st, int number, int flags) |
1737 | { |
1738 | int error; |
1739 | struct scsi_write_filemarks cmd; |
1740 | |
1741 | /* |
1742 | * It's hard to write a negative number of file marks. |
1743 | * Don't try. |
1744 | */ |
1745 | if (number < 0) |
1746 | return EINVAL; |
1747 | switch (number) { |
1748 | case 0: /* really a command to sync the drive's buffers */ |
1749 | break; |
1750 | case 1: |
1751 | if (st->flags & ST_FM_WRITTEN) /* already have one down */ |
1752 | st->flags &= ~ST_WRITTEN; |
1753 | else |
1754 | st->flags |= ST_FM_WRITTEN; |
1755 | st->flags &= ~ST_PER_ACTION; |
1756 | break; |
1757 | default: |
1758 | st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); |
1759 | } |
1760 | |
1761 | memset(&cmd, 0, sizeof(cmd)); |
1762 | cmd.opcode = WRITE_FILEMARKS; |
1763 | if (SCSIPI_BUSTYPE_TYPE(scsipi_periph_bustype(st->sc_periph)) == |
1764 | SCSIPI_BUSTYPE_ATAPI) |
1765 | cmd.byte2 = SR_IMMED; |
1766 | /* |
1767 | * The ATAPI Onstream DI-30 doesn't support writing filemarks, but |
1768 | * WRITE_FILEMARKS is still used to flush the buffer |
1769 | */ |
1770 | if ((st->quirks & ST_Q_NOFILEMARKS) == 0) |
1771 | _lto3b(number, cmd.number); |
1772 | |
1773 | /* XXX WE NEED TO BE ABLE TO GET A RESIDIUAL XXX */ |
1774 | error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, |
1775 | 0, ST_IO_TIME * 4, NULL, flags); |
1776 | if (error == 0 && st->fileno != -1) |
1777 | st->fileno += number; |
1778 | return error; |
1779 | } |
1780 | |
1781 | /* |
1782 | * Make sure the right number of file marks is on tape if the |
1783 | * tape has been written. If the position argument is true, |
1784 | * leave the tape positioned where it was originally. |
1785 | * |
1786 | * nmarks returns the number of marks to skip (or, if position |
1787 | * true, which were skipped) to get back original position. |
1788 | */ |
1789 | static int |
1790 | st_check_eod(struct st_softc *st, boolean position, int *nmarks, int flags) |
1791 | { |
1792 | int error; |
1793 | |
1794 | switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { |
1795 | default: |
1796 | *nmarks = 0; |
1797 | return 0; |
1798 | case ST_WRITTEN: |
1799 | case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: |
1800 | *nmarks = 1; |
1801 | break; |
1802 | case ST_WRITTEN | ST_2FM_AT_EOD: |
1803 | *nmarks = 2; |
1804 | } |
1805 | error = st_write_filemarks(st, *nmarks, flags); |
1806 | if (position && !error) |
1807 | error = st_space(st, -*nmarks, SP_FILEMARKS, flags); |
1808 | return error; |
1809 | } |
1810 | |
1811 | /* load/unload/retension */ |
1812 | static int |
1813 | st_load(struct st_softc *st, u_int type, int flags) |
1814 | { |
1815 | int error; |
1816 | struct scsi_load cmd; |
1817 | |
1818 | if (type != LD_LOAD) { |
1819 | int nmarks; |
1820 | |
1821 | error = st_check_eod(st, FALSE, &nmarks, flags); |
1822 | if (error) { |
1823 | aprint_error_dev(st->sc_dev, |
1824 | "failed to write closing filemarks at " |
1825 | "unload, errno=%d\n" , error); |
1826 | return error; |
1827 | } |
1828 | } |
1829 | if (st->quirks & ST_Q_IGNORE_LOADS) { |
1830 | if (type == LD_LOAD) |
1831 | /* |
1832 | * If we ignore loads, at least we should try a rewind. |
1833 | */ |
1834 | return st_rewind(st, 0, flags); |
1835 | /* otherwise, we should do what's asked of us */ |
1836 | } |
1837 | |
1838 | memset(&cmd, 0, sizeof(cmd)); |
1839 | cmd.opcode = LOAD; |
1840 | if (SCSIPI_BUSTYPE_TYPE(scsipi_periph_bustype(st->sc_periph)) == |
1841 | SCSIPI_BUSTYPE_ATAPI) |
1842 | cmd.byte2 = SR_IMMED; |
1843 | cmd.how = type; |
1844 | |
1845 | error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, |
1846 | ST_RETRIES, ST_SPC_TIME, NULL, flags); |
1847 | if (error) { |
1848 | aprint_error_dev(st->sc_dev, "error %d in st_load (op %d)\n" , |
1849 | error, type); |
1850 | } |
1851 | return error; |
1852 | } |
1853 | |
1854 | /* Rewind the device */ |
1855 | static int |
1856 | st_rewind(struct st_softc *st, u_int immediate, int flags) |
1857 | { |
1858 | struct scsi_rewind cmd; |
1859 | int error; |
1860 | int nmarks; |
1861 | int timeout; |
1862 | |
1863 | error = st_check_eod(st, FALSE, &nmarks, flags); |
1864 | if (error) { |
1865 | aprint_error_dev(st->sc_dev, |
1866 | "failed to write closing filemarks at " |
1867 | "rewind, errno=%d\n" , error); |
1868 | return error; |
1869 | } |
1870 | st->flags &= ~ST_PER_ACTION; |
1871 | |
1872 | /* If requestor asked for immediate response, set a short timeout */ |
1873 | timeout = immediate ? ST_CTL_TIME : ST_SPC_TIME; |
1874 | |
1875 | /* ATAPI tapes always need immediate to be set */ |
1876 | if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) |
1877 | immediate = SR_IMMED; |
1878 | |
1879 | memset(&cmd, 0, sizeof(cmd)); |
1880 | cmd.opcode = REWIND; |
1881 | cmd.byte2 = immediate; |
1882 | |
1883 | error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, |
1884 | ST_RETRIES, timeout, NULL, flags); |
1885 | if (error) { |
1886 | aprint_error_dev(st->sc_dev, "error %d trying to rewind\n" , |
1887 | error); |
1888 | /* lost position */ |
1889 | st->fileno = st->blkno = -1; |
1890 | } else |
1891 | st->fileno = st->blkno = 0; |
1892 | return error; |
1893 | } |
1894 | |
1895 | static int |
1896 | st_rdpos(struct st_softc *st, int hard, uint32_t *blkptr) |
1897 | { |
1898 | int error; |
1899 | uint8_t posdata[20]; |
1900 | struct scsi_tape_read_position cmd; |
1901 | |
1902 | /* |
1903 | * We try and flush any buffered writes here if we were writing |
1904 | * and we're trying to get hardware block position. It eats |
1905 | * up performance substantially, but I'm wary of drive firmware. |
1906 | * |
1907 | * I think that *logical* block position is probably okay- |
1908 | * but hardware block position might have to wait for data |
1909 | * to hit media to be valid. Caveat Emptor. |
1910 | */ |
1911 | |
1912 | if (hard && (st->flags & ST_WRITTEN)) { |
1913 | /* First flush any pending writes... */ |
1914 | error = st_write_filemarks(st, 0, XS_CTL_SILENT); |
1915 | /* |
1916 | * The latter case is for 'write protected' tapes |
1917 | * which are too stupid to recognize a zero count |
1918 | * for writing filemarks as a no-op. |
1919 | */ |
1920 | if (error != 0 && error != EACCES && error != EROFS) |
1921 | return error; |
1922 | } |
1923 | |
1924 | memset(&cmd, 0, sizeof(cmd)); |
1925 | memset(&posdata, 0, sizeof(posdata)); |
1926 | cmd.opcode = READ_POSITION; |
1927 | if (hard) |
1928 | cmd.byte1 = 1; |
1929 | |
1930 | error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), |
1931 | (void *)&posdata, sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, |
1932 | XS_CTL_SILENT | XS_CTL_DATA_IN); |
1933 | |
1934 | if (error == 0) { |
1935 | #if 0 |
1936 | printf("posdata:" ); |
1937 | for (hard = 0; hard < sizeof(posdata); hard++) |
1938 | printf("%02x " , posdata[hard] & 0xff); |
1939 | printf("\n" ); |
1940 | #endif |
1941 | if (posdata[0] & 0x4) /* Block Position Unknown */ |
1942 | error = EINVAL; |
1943 | else |
1944 | *blkptr = _4btol(&posdata[4]); |
1945 | } |
1946 | return error; |
1947 | } |
1948 | |
1949 | static int |
1950 | st_setpos(struct st_softc *st, int hard, uint32_t *blkptr) |
1951 | { |
1952 | int error; |
1953 | struct scsi_tape_locate cmd; |
1954 | |
1955 | /* |
1956 | * We used to try and flush any buffered writes here. |
1957 | * Now we push this onto user applications to either |
1958 | * flush the pending writes themselves (via a zero count |
1959 | * WRITE FILEMARKS command) or they can trust their tape |
1960 | * drive to do this correctly for them. |
1961 | * |
1962 | * There are very ugly performance limitations otherwise. |
1963 | */ |
1964 | |
1965 | memset(&cmd, 0, sizeof(cmd)); |
1966 | cmd.opcode = LOCATE; |
1967 | if (hard) |
1968 | cmd.byte2 = 1 << 2; |
1969 | _lto4b(*blkptr, cmd.blkaddr); |
1970 | error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, |
1971 | ST_RETRIES, ST_SPC_TIME, NULL, 0); |
1972 | /* |
1973 | * Note file && block number position now unknown (if |
1974 | * these things ever start being maintained in this driver) |
1975 | */ |
1976 | st->fileno = st->blkno = -1; |
1977 | return error; |
1978 | } |
1979 | |
1980 | |
1981 | /* |
1982 | * Look at the returned sense and act on the error and determine |
1983 | * the unix error number to pass back..., 0 (== report no error), |
1984 | * -1 = retry the operation, -2 continue error processing. |
1985 | */ |
1986 | static int |
1987 | st_interpret_sense(struct scsipi_xfer *xs) |
1988 | { |
1989 | struct scsipi_periph *periph = xs->xs_periph; |
1990 | struct scsi_sense_data *sense = &xs->sense.scsi_sense; |
1991 | struct buf *bp = xs->bp; |
1992 | struct st_softc *st = device_private(periph->periph_dev); |
1993 | int retval = EJUSTRETURN; |
1994 | int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); |
1995 | uint8_t key; |
1996 | int32_t info; |
1997 | |
1998 | /* |
1999 | * If it isn't a extended or extended/deferred error, let |
2000 | * the generic code handle it. |
2001 | */ |
2002 | if (SSD_RCODE(sense->response_code) != SSD_RCODE_CURRENT && |
2003 | SSD_RCODE(sense->response_code) != SSD_RCODE_DEFERRED) |
2004 | return retval; |
2005 | |
2006 | if (sense->response_code & SSD_RCODE_VALID) |
2007 | info = _4btol(sense->info); |
2008 | else |
2009 | info = (st->flags & ST_FIXEDBLOCKS) ? |
2010 | xs->datalen / st->blksize : xs->datalen; |
2011 | key = SSD_SENSE_KEY(sense->flags); |
2012 | st->mt_erreg = key; |
2013 | st->asc = sense->asc; |
2014 | st->ascq = sense->ascq; |
2015 | st->mt_resid = (short) info; |
2016 | |
2017 | if (key == SKEY_NOT_READY && st->asc == 0x4 && st->ascq == 0x1) { |
2018 | /* Not Ready, Logical Unit Is in Process Of Becoming Ready */ |
2019 | if (!callout_pending(&periph->periph_callout)) |
2020 | scsipi_periph_freeze(periph, 1); |
2021 | callout_reset(&periph->periph_callout, |
2022 | hz, scsipi_periph_timed_thaw, periph); |
2023 | return ERESTART; |
2024 | } |
2025 | |
2026 | /* If the device is not open yet, let generic handle */ |
2027 | if ((periph->periph_flags & PERIPH_OPEN) == 0) |
2028 | return retval; |
2029 | |
2030 | xs->resid = info; |
2031 | if (st->flags & ST_FIXEDBLOCKS) { |
2032 | if (bp) { |
2033 | xs->resid *= st->blksize; |
2034 | st->last_io_resid = xs->resid; |
2035 | } else |
2036 | st->last_ctl_resid = xs->resid; |
2037 | if (key == SKEY_VOLUME_OVERFLOW) { |
2038 | st->flags |= ST_EIO_PENDING; |
2039 | if (bp) |
2040 | bp->b_resid = xs->resid; |
2041 | } else if (sense->flags & SSD_EOM) { |
2042 | if ((st->flags & ST_EARLYWARN) == 0) |
2043 | st->flags |= ST_EIO_PENDING; |
2044 | st->flags |= ST_EOM_PENDING; |
2045 | if (bp) { |
2046 | #if 0 |
2047 | bp->b_resid = xs->resid; |
2048 | #else |
2049 | /* |
2050 | * Grotesque as it seems, the few times |
2051 | * I've actually seen a non-zero resid, |
2052 | * the tape drive actually lied and had |
2053 | * written all the data! |
2054 | */ |
2055 | bp->b_resid = 0; |
2056 | #endif |
2057 | } |
2058 | } |
2059 | if (sense->flags & SSD_FILEMARK) { |
2060 | st->flags |= ST_AT_FILEMARK; |
2061 | if (bp) |
2062 | bp->b_resid = xs->resid; |
2063 | if (st->fileno != (daddr_t) -1) { |
2064 | st->fileno++; |
2065 | st->blkno = 0; |
2066 | st->flags |= ST_POSUPDATED; |
2067 | } |
2068 | } |
2069 | if (sense->flags & SSD_ILI) { |
2070 | st->flags |= ST_EIO_PENDING; |
2071 | if (bp) |
2072 | bp->b_resid = xs->resid; |
2073 | if (sense->response_code & SSD_RCODE_VALID && |
2074 | (xs->xs_control & XS_CTL_SILENT) == 0) |
2075 | aprint_error_dev(st->sc_dev, |
2076 | "block wrong size, %d blocks residual\n" , |
2077 | info); |
2078 | |
2079 | /* |
2080 | * This quirk code helps the drive read |
2081 | * the first tape block, regardless of |
2082 | * format. That is required for these |
2083 | * drives to return proper MODE SENSE |
2084 | * information. |
2085 | */ |
2086 | if ((st->quirks & ST_Q_SENSE_HELP) && |
2087 | (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) |
2088 | st->blksize -= 512; |
2089 | else if ((st->flags & ST_POSUPDATED) == 0) { |
2090 | if (st->blkno != (daddr_t) -1) { |
2091 | st->blkno += |
2092 | (xs->datalen / st->blksize); |
2093 | st->flags |= ST_POSUPDATED; |
2094 | } |
2095 | } |
2096 | } |
2097 | /* |
2098 | * If data wanted and no data was transferred, do it immediately |
2099 | */ |
2100 | if (xs->datalen && xs->resid >= xs->datalen) { |
2101 | if (st->flags & ST_EIO_PENDING) |
2102 | return EIO; |
2103 | if (st->flags & ST_AT_FILEMARK) { |
2104 | if (bp) |
2105 | bp->b_resid = xs->resid; |
2106 | return 0; |
2107 | } |
2108 | } |
2109 | } else { /* must be variable mode */ |
2110 | if (bp) |
2111 | st->last_io_resid = xs->resid; |
2112 | else |
2113 | st->last_ctl_resid = xs->resid; |
2114 | if (sense->flags & SSD_EOM) { |
2115 | /* |
2116 | * The current semantics of this |
2117 | * driver requires EOM detection |
2118 | * to return EIO unless early |
2119 | * warning detection is enabled |
2120 | * for variable mode (this is always |
2121 | * on for fixed block mode). |
2122 | */ |
2123 | if (st->flags & ST_EARLYWARN) { |
2124 | st->flags |= ST_EOM_PENDING; |
2125 | retval = 0; |
2126 | } else { |
2127 | retval = EIO; |
2128 | /* |
2129 | * If we return an error we can't claim to |
2130 | * have transfered all data. |
2131 | */ |
2132 | if (xs->resid == 0) |
2133 | xs->resid = xs->datalen; |
2134 | } |
2135 | |
2136 | /* |
2137 | * If it's an unadorned EOM detection, |
2138 | * suppress printing an error. |
2139 | */ |
2140 | if (key == SKEY_NO_SENSE) { |
2141 | doprint = 0; |
2142 | } |
2143 | } else if (sense->flags & SSD_FILEMARK) { |
2144 | retval = 0; |
2145 | if (st->fileno != (daddr_t) -1) { |
2146 | st->fileno++; |
2147 | st->blkno = 0; |
2148 | st->flags |= ST_POSUPDATED; |
2149 | } |
2150 | } else if (sense->flags & SSD_ILI) { |
2151 | if (info < 0) { |
2152 | /* |
2153 | * The tape record was bigger than the read |
2154 | * we issued. |
2155 | */ |
2156 | if ((xs->xs_control & XS_CTL_SILENT) == 0) { |
2157 | aprint_error_dev(st->sc_dev, |
2158 | "%d-byte tape record too big" |
2159 | " for %d-byte user buffer\n" , |
2160 | xs->datalen - info, xs->datalen); |
2161 | } |
2162 | retval = EIO; |
2163 | } else { |
2164 | retval = 0; |
2165 | if (st->blkno != (daddr_t) -1) { |
2166 | st->blkno++; |
2167 | st->flags |= ST_POSUPDATED; |
2168 | } |
2169 | } |
2170 | } |
2171 | if (bp) |
2172 | bp->b_resid = xs->resid; |
2173 | } |
2174 | |
2175 | #ifndef SCSIPI_DEBUG |
2176 | if (retval == 0 && key == SKEY_NO_SENSE) |
2177 | doprint = 0; |
2178 | #endif |
2179 | if (key == SKEY_BLANK_CHECK) { |
2180 | /* |
2181 | * This quirk code helps the drive read the |
2182 | * first tape block, regardless of format. That |
2183 | * is required for these drives to return proper |
2184 | * MODE SENSE information. |
2185 | */ |
2186 | if ((st->quirks & ST_Q_SENSE_HELP) && |
2187 | (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { |
2188 | /* still starting */ |
2189 | st->blksize -= 512; |
2190 | } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { |
2191 | st->flags |= ST_BLANK_READ; |
2192 | xs->resid = xs->datalen; |
2193 | if (bp) { |
2194 | bp->b_resid = xs->resid; |
2195 | /* return an EOF */ |
2196 | } |
2197 | retval = 0; |
2198 | /* lost position */ |
2199 | st->fileno = st->blkno = -1; |
2200 | } |
2201 | } |
2202 | |
2203 | /* |
2204 | * If generic sense processing will continue, we should not |
2205 | * print sense info here. |
2206 | */ |
2207 | if (retval == EJUSTRETURN) |
2208 | doprint = 0; |
2209 | |
2210 | if (doprint) { |
2211 | /* Print verbose sense info if possible */ |
2212 | if (scsipi_print_sense(xs, 0) != 0) |
2213 | return retval; |
2214 | |
2215 | /* Print less-verbose sense info */ |
2216 | scsipi_printaddr(periph); |
2217 | printf("Sense Key 0x%02x" , key); |
2218 | if ((sense->response_code & SSD_RCODE_VALID) != 0) { |
2219 | switch (key) { |
2220 | case SKEY_NOT_READY: |
2221 | case SKEY_ILLEGAL_REQUEST: |
2222 | case SKEY_UNIT_ATTENTION: |
2223 | case SKEY_DATA_PROTECT: |
2224 | break; |
2225 | case SKEY_VOLUME_OVERFLOW: |
2226 | case SKEY_BLANK_CHECK: |
2227 | printf(", requested size: %d (decimal)" , info); |
2228 | break; |
2229 | case SKEY_ABORTED_COMMAND: |
2230 | if (xs->xs_retries) |
2231 | printf(", retrying" ); |
2232 | printf(", cmd 0x%x, info 0x%x" , |
2233 | xs->cmd->opcode, info); |
2234 | break; |
2235 | default: |
2236 | printf(", info = %d (decimal)" , info); |
2237 | } |
2238 | } |
2239 | if (sense->extra_len != 0) { |
2240 | int n; |
2241 | printf(", data =" ); |
2242 | for (n = 0; n < sense->extra_len; n++) |
2243 | printf(" %02x" , sense->csi[n]); |
2244 | } |
2245 | printf("\n" ); |
2246 | } |
2247 | return retval; |
2248 | } |
2249 | |
2250 | /* |
2251 | * The quirk here is that the drive returns some value to st_mode_sense |
2252 | * incorrectly until the tape has actually passed by the head. |
2253 | * |
2254 | * The method is to set the drive to large fixed-block state (user-specified |
2255 | * density and 1024-byte blocks), then read and rewind to get it to sense the |
2256 | * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't |
2257 | * work, as a last resort, try variable- length blocks. The result will be |
2258 | * the ability to do an accurate st_mode_sense. |
2259 | * |
2260 | * We know we can do a rewind because we just did a load, which implies rewind. |
2261 | * Rewind seems preferable to space backward if we have a virgin tape. |
2262 | * |
2263 | * The rest of the code for this quirk is in ILI processing and BLANK CHECK |
2264 | * error processing, both part of st_interpret_sense. |
2265 | */ |
2266 | static int |
2267 | st_touch_tape(struct st_softc *st) |
2268 | { |
2269 | char *bf; |
2270 | int readsize; |
2271 | int error; |
2272 | |
2273 | bf = malloc(1024, M_TEMP, M_NOWAIT); |
2274 | if (bf == NULL) |
2275 | return ENOMEM; |
2276 | |
2277 | if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) |
2278 | goto bad; |
2279 | |
2280 | /* |
2281 | * If the block size is already known from the |
2282 | * sense data, use it. Else start probing at 1024. |
2283 | */ |
2284 | if (st->media_blksize > 0) |
2285 | st->blksize = st->media_blksize; |
2286 | else |
2287 | st->blksize = 1024; |
2288 | |
2289 | do { |
2290 | switch (st->blksize) { |
2291 | case 512: |
2292 | case 1024: |
2293 | readsize = st->blksize; |
2294 | st->flags |= ST_FIXEDBLOCKS; |
2295 | break; |
2296 | default: |
2297 | readsize = 1; |
2298 | st->flags &= ~ST_FIXEDBLOCKS; |
2299 | } |
2300 | if ((error = st->ops(st, ST_OPS_MODESELECT, XS_CTL_SILENT)) |
2301 | != 0) { |
2302 | /* |
2303 | * The device did not agree with the proposed |
2304 | * block size. If we exhausted our options, |
2305 | * return failure, else try another. |
2306 | */ |
2307 | if (readsize == 1) |
2308 | goto bad; |
2309 | st->blksize -= 512; |
2310 | continue; |
2311 | } |
2312 | st_read(st, bf, readsize, XS_CTL_SILENT); /* XXX */ |
2313 | if ((error = st_rewind(st, 0, 0)) != 0) { |
2314 | bad: free(bf, M_TEMP); |
2315 | return error; |
2316 | } |
2317 | } while (readsize != 1 && readsize > st->blksize); |
2318 | |
2319 | free(bf, M_TEMP); |
2320 | return 0; |
2321 | } |
2322 | |
2323 | static int |
2324 | stdump(dev_t dev, daddr_t blkno, void *va, size_t size) |
2325 | { |
2326 | /* Not implemented. */ |
2327 | return ENXIO; |
2328 | } |
2329 | |
2330 | /* |
2331 | * Send a filled out parameter structure to the drive to |
2332 | * set it into the desire modes etc. |
2333 | */ |
2334 | int |
2335 | st_mode_select(struct st_softc *st, int flags) |
2336 | { |
2337 | u_int select_len; |
2338 | struct select { |
2339 | struct scsi_mode_parameter_header_6 ; |
2340 | struct scsi_general_block_descriptor blk_desc; |
2341 | u_char sense_data[MAX_PAGE_0_SIZE]; |
2342 | } select; |
2343 | struct scsipi_periph *periph = st->sc_periph; |
2344 | |
2345 | select_len = sizeof(select.header) + sizeof(select.blk_desc) + |
2346 | st->page_0_size; |
2347 | |
2348 | /* |
2349 | * This quirk deals with drives that have only one valid mode |
2350 | * and think this gives them license to reject all mode selects, |
2351 | * even if the selected mode is the one that is supported. |
2352 | */ |
2353 | if (st->quirks & ST_Q_UNIMODAL) { |
2354 | SC_DEBUG(periph, SCSIPI_DB3, |
2355 | ("not setting density 0x%x blksize 0x%x\n" , |
2356 | st->density, st->blksize)); |
2357 | return 0; |
2358 | } |
2359 | |
2360 | /* Set up for a mode select */ |
2361 | memset(&select, 0, sizeof(select)); |
2362 | select.header.blk_desc_len = sizeof(struct |
2363 | scsi_general_block_descriptor); |
2364 | select.header.dev_spec &= ~SMH_DSP_BUFF_MODE; |
2365 | select.blk_desc.density = st->density; |
2366 | if (st->flags & ST_DONTBUFFER) |
2367 | select.header.dev_spec |= SMH_DSP_BUFF_MODE_OFF; |
2368 | else |
2369 | select.header.dev_spec |= SMH_DSP_BUFF_MODE_ON; |
2370 | if (st->flags & ST_FIXEDBLOCKS) |
2371 | _lto3b(st->blksize, select.blk_desc.blklen); |
2372 | if (st->page_0_size) |
2373 | memcpy(select.sense_data, st->sense_data, st->page_0_size); |
2374 | |
2375 | /* do the command */ |
2376 | return scsipi_mode_select(periph, 0, &select.header, select_len, |
2377 | flags, ST_RETRIES, ST_CTL_TIME); |
2378 | } |
2379 | |