File: | scsi/st.c |
Warning: | line 732, column 2 Value stored to 'link' is never read |
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1 | /* $OpenBSD: st.c,v 1.188 2022/01/11 23:10:11 jsg Exp $ */ |
2 | /* $NetBSD: st.c,v 1.71 1997/02/21 23:03:49 thorpej Exp $ */ |
3 | |
4 | /* |
5 | * Copyright (c) 1994 Charles Hannum. All rights reserved. |
6 | * |
7 | * Redistribution and use in source and binary forms, with or without |
8 | * modification, are permitted provided that the following conditions |
9 | * are met: |
10 | * 1. Redistributions of source code must retain the above copyright |
11 | * notice, this list of conditions and the following disclaimer. |
12 | * 2. Redistributions in binary form must reproduce the above copyright |
13 | * notice, this list of conditions and the following disclaimer in the |
14 | * documentation and/or other materials provided with the distribution. |
15 | * 3. All advertising materials mentioning features or use of this software |
16 | * must display the following acknowledgement: |
17 | * This product includes software developed by Charles Hannum. |
18 | * 4. The name of the author may not be used to endorse or promote products |
19 | * derived from this software without specific prior written permission. |
20 | * |
21 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
22 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
23 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
24 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
25 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
26 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
27 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
28 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
29 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
30 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
31 | */ |
32 | |
33 | /* |
34 | * Originally written by Julian Elischer (julian@tfs.com) |
35 | * for TRW Financial Systems for use under the MACH(2.5) operating system. |
36 | * |
37 | * TRW Financial Systems, in accordance with their agreement with Carnegie |
38 | * Mellon University, makes this software available to CMU to distribute |
39 | * or use in any manner that they see fit as long as this message is kept with |
40 | * the software. For this reason TFS also grants any other persons or |
41 | * organisations permission to use or modify this software. |
42 | * |
43 | * TFS supplies this software to be publicly redistributed |
44 | * on the understanding that TFS is not responsible for the correct |
45 | * functioning of this software in any circumstances. |
46 | * |
47 | * Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992 |
48 | * major changes by Julian Elischer (julian@jules.dialix.oz.au) May 1993 |
49 | */ |
50 | |
51 | /* |
52 | * To do: |
53 | * work out some better way of guessing what a good timeout is going |
54 | * to be depending on whether we expect to retension or not. |
55 | */ |
56 | |
57 | #include <sys/param.h> |
58 | #include <sys/systm.h> |
59 | #include <sys/timeout.h> |
60 | #include <sys/fcntl.h> |
61 | #include <sys/errno.h> |
62 | #include <sys/ioctl.h> |
63 | #include <sys/stat.h> |
64 | #include <sys/pool.h> |
65 | #include <sys/buf.h> |
66 | #include <sys/mtio.h> |
67 | #include <sys/device.h> |
68 | #include <sys/conf.h> |
69 | #include <sys/vnode.h> |
70 | |
71 | #include <scsi/scsi_all.h> |
72 | #include <scsi/scsi_debug.h> |
73 | #include <scsi/scsi_tape.h> |
74 | #include <scsi/scsiconf.h> |
75 | |
76 | /* Defines for device specific stuff */ |
77 | #define DEF_FIXED_BSIZE512 512 |
78 | |
79 | #define STMODE(z)( ((unsigned)((z) & 0xff) | (((z) & 0xffff0000) >> 8)) & 0x03) ( minor(z)((unsigned)((z) & 0xff) | (((z) & 0xffff0000) >> 8)) & 0x03) |
80 | #define STUNIT(z)((((unsigned)((z) & 0xff) | (((z) & 0xffff0000) >> 8)) >> 4) ) ((minor(z)((unsigned)((z) & 0xff) | (((z) & 0xffff0000) >> 8)) >> 4) ) |
81 | |
82 | #define STMINOR(unit, mode)(((unit) << 4) + (mode)) (((unit) << 4) + (mode)) |
83 | #define MAXSTMODES16 16 /* Old max retained so minor's don't change. */ |
84 | |
85 | #define ST_IO_TIME(3 * 60 * 1000) (3 * 60 * 1000) /* 3 minutes */ |
86 | #define ST_CTL_TIME(30 * 1000) (30 * 1000) /* 30 seconds */ |
87 | #define ST_SPC_TIME(4 * 60 * 60 * 1000) (4 * 60 * 60 * 1000) /* 4 hours */ |
88 | |
89 | /* |
90 | * Maximum density code allowed in SCSI spec (SSC2R08f, Section 8.3). |
91 | */ |
92 | #define SCSI_MAX_DENSITY_CODE0xff 0xff |
93 | |
94 | /* |
95 | * Define various devices that we know mis-behave in some way, |
96 | * and note how they are bad, so we can correct for them |
97 | */ |
98 | struct mode { |
99 | int blksize; |
100 | u_int8_t density; |
101 | }; |
102 | |
103 | struct quirkdata { |
104 | u_int quirks; |
105 | #define ST_Q_SENSE_HELP0x0001 0x0001 /* must do READ for good MODE SENSE */ |
106 | #define ST_Q_IGNORE_LOADS0x0002 0x0002 |
107 | #define ST_Q_UNIMODAL0x0004 0x0004 /* unimode drive rejects mode select */ |
108 | struct mode mode; |
109 | }; |
110 | |
111 | struct st_quirk_inquiry_pattern { |
112 | struct scsi_inquiry_pattern pattern; |
113 | struct quirkdata quirkdata; |
114 | }; |
115 | |
116 | const struct st_quirk_inquiry_pattern st_quirk_patterns[] = { |
117 | {{T_SEQUENTIAL0x01, T_REMOV1, |
118 | " ", " ", " "}, {0, |
119 | {512, 0}}}, |
120 | {{T_SEQUENTIAL0x01, T_REMOV1, |
121 | "TANDBERG", " TDC 3800 ", ""}, {0, |
122 | {512, 0}}}, |
123 | {{T_SEQUENTIAL0x01, T_REMOV1, |
124 | "ARCHIVE ", "VIPER 2525 25462", ""}, {ST_Q_SENSE_HELP0x0001, |
125 | {0, 0}}}, |
126 | {{T_SEQUENTIAL0x01, T_REMOV1, |
127 | "SANKYO ", "CP525 ", ""}, {0, |
128 | {512, 0}}}, |
129 | {{T_SEQUENTIAL0x01, T_REMOV1, |
130 | "ANRITSU ", "DMT780 ", ""}, {0, |
131 | {512, 0}}}, |
132 | {{T_SEQUENTIAL0x01, T_REMOV1, |
133 | "ARCHIVE ", "VIPER 150 21531", ""}, {ST_Q_SENSE_HELP0x0001, |
134 | {0, 0}}}, |
135 | {{T_SEQUENTIAL0x01, T_REMOV1, |
136 | "WANGTEK ", "5099ES SCSI", ""}, {0, |
137 | {512, 0}}}, |
138 | {{T_SEQUENTIAL0x01, T_REMOV1, |
139 | "WANGTEK ", "5150ES SCSI", ""}, {0, |
140 | {512, 0}}}, |
141 | {{T_SEQUENTIAL0x01, T_REMOV1, |
142 | "HP ", "T4000s ", ""}, {ST_Q_UNIMODAL0x0004, |
143 | {0, QIC_30950x45}}}, |
144 | {{T_SEQUENTIAL0x01, T_REMOV1, |
145 | "WANGTEK ", "5150ES SCSI FA15", "01 A"}, {ST_Q_IGNORE_LOADS0x0002, |
146 | {0, 0}}}, |
147 | {{T_SEQUENTIAL0x01, T_REMOV1, |
148 | "TEAC ", "MT-2ST/N50 ", ""}, {ST_Q_IGNORE_LOADS0x0002, |
149 | {0, 0}}}, |
150 | }; |
151 | |
152 | #define NOEJECT0 0 |
153 | #define EJECT1 1 |
154 | |
155 | #define NOREWIND0 0 |
156 | #define DOREWIND1 1 |
157 | |
158 | struct st_softc { |
159 | struct device sc_dev; |
160 | |
161 | int flags; |
162 | #define ST_INFO_VALID0x00000001 0x00000001 |
163 | #define ST_WRITTEN0x00000004 0x00000004 |
164 | #define ST_FIXEDBLOCKS0x00000008 0x00000008 |
165 | #define ST_AT_FILEMARK0x00000010 0x00000010 |
166 | #define ST_EIO_PENDING0x00000020 0x00000020 |
167 | #define ST_EOM_PENDING0x00000040 0x00000040 |
168 | #define ST_EOD_DETECTED0x00000080 0x00000080 |
169 | #define ST_FM_WRITTEN0x00000100 0x00000100 |
170 | #define ST_BLANK_READ0x00000200 0x00000200 |
171 | #define ST_2FM_AT_EOD0x00000400 0x00000400 |
172 | #define ST_MOUNTED0x00000800 0x00000800 |
173 | #define ST_DONTBUFFER0x00001000 0x00001000 |
174 | #define ST_DYING0x00004000 0x00004000 |
175 | #define ST_BOD_DETECTED0x00008000 0x00008000 |
176 | #define ST_MODE_DENSITY0x00010000 0x00010000 |
177 | #define ST_MODE_BLKSIZE0x00040000 0x00040000 |
178 | |
179 | u_int quirks; /* quirks for the open mode */ |
180 | int blksize; /* blksize we are using */ |
181 | u_int8_t density; /* present density */ |
182 | short mt_resid; /* last (short) resid */ |
183 | short mt_erreg; /* last error (sense key) seen */ |
184 | |
185 | struct scsi_link *sc_link; /* our link to the adapter etc. */ |
186 | |
187 | int blkmin; /* min blk size */ |
188 | int blkmax; /* max blk size */ |
189 | |
190 | u_int32_t media_blksize; /* 0 if not ST_FIXEDBLOCKS */ |
191 | u_int32_t media_density; /* this is what it said when asked */ |
192 | int media_fileno; /* relative to BOT. -1 means unknown. */ |
193 | int media_blkno; /* relative to BOF. -1 means unknown. */ |
194 | int media_eom; /* relative to BOT. -1 means unknown. */ |
195 | |
196 | struct mode mode; |
197 | struct bufq sc_bufq; |
198 | struct scsi_xshandler sc_xsh; |
199 | }; |
200 | |
201 | |
202 | int stmatch(struct device *, void *, void *); |
203 | void stattach(struct device *, struct device *, void *); |
204 | int stactivate(struct device *, int); |
205 | int stdetach(struct device *, int); |
206 | void stminphys(struct buf *); |
207 | void ststart(struct scsi_xfer *); |
208 | |
209 | int st_mount_tape(struct st_softc *, int); |
210 | void st_unmount(struct st_softc *, int, int); |
211 | int st_decide_mode(struct st_softc *, int); |
212 | void st_buf_done(struct scsi_xfer *); |
213 | int st_read(struct st_softc *, char *, int, int); |
214 | int st_read_block_limits(struct st_softc *, int); |
215 | int st_mode_sense(struct st_softc *, int); |
216 | int st_mode_select(struct st_softc *, int); |
217 | int st_space(struct st_softc *, int, u_int, int); |
218 | int st_write_filemarks(struct st_softc *, int, int); |
219 | int st_check_eod(struct st_softc *, int, int *, int); |
220 | int st_load(struct st_softc *, u_int, int); |
221 | int st_rewind(struct st_softc *, u_int, int); |
222 | int st_interpret_sense(struct scsi_xfer *); |
223 | int st_touch_tape(struct st_softc *); |
224 | int st_erase(struct st_softc *, int, int); |
225 | |
226 | const struct cfattach st_ca = { |
227 | sizeof(struct st_softc), stmatch, stattach, |
228 | stdetach, stactivate |
229 | }; |
230 | |
231 | struct cfdriver st_cd = { |
232 | NULL((void *)0), "st", DV_TAPE |
233 | }; |
234 | |
235 | #define ST_PER_ACTION(0x00000010 | 0x00000020 | 0x00000040 | 0x00000200) (ST_AT_FILEMARK0x00000010 | ST_EIO_PENDING0x00000020 | ST_EOM_PENDING0x00000040 | \ |
236 | ST_BLANK_READ0x00000200) |
237 | |
238 | #define stlookup(unit)(struct st_softc *)device_lookup(&st_cd, (unit)) (struct st_softc *)device_lookup(&st_cd, (unit)) |
239 | |
240 | const struct scsi_inquiry_pattern st_patterns[] = { |
241 | {T_SEQUENTIAL0x01, T_REMOV1, |
242 | "", "", ""}, |
243 | }; |
244 | |
245 | int |
246 | stmatch(struct device *parent, void *match, void *aux) |
247 | { |
248 | struct scsi_attach_args *sa = aux; |
249 | struct scsi_inquiry_data *inq = &sa->sa_sc_link->inqdata; |
250 | int priority; |
251 | |
252 | (void)scsi_inqmatch(inq, st_patterns, nitems(st_patterns)(sizeof((st_patterns)) / sizeof((st_patterns)[0])), |
253 | sizeof(st_patterns[0]), &priority); |
254 | return priority; |
255 | } |
256 | |
257 | /* |
258 | * The routine called by the low level scsi routine when it discovers |
259 | * a device suitable for this driver. |
260 | */ |
261 | void |
262 | stattach(struct device *parent, struct device *self, void *aux) |
263 | { |
264 | const struct st_quirk_inquiry_pattern *finger; |
265 | struct st_softc *st = (void *)self; |
266 | struct scsi_attach_args *sa = aux; |
267 | struct scsi_link *link = sa->sa_sc_link; |
268 | int priority; |
269 | |
270 | SC_DEBUG(link, SDEV_DB2, ("stattach:\n")); |
271 | |
272 | /* |
273 | * Store information needed to contact our base driver |
274 | */ |
275 | st->sc_link = link; |
276 | link->interpret_sense = st_interpret_sense; |
277 | link->device_softc = st; |
278 | |
279 | /* Get any quirks and mode information. */ |
280 | finger = (const struct st_quirk_inquiry_pattern *)scsi_inqmatch( |
281 | &link->inqdata, |
282 | st_quirk_patterns, |
283 | nitems(st_quirk_patterns)(sizeof((st_quirk_patterns)) / sizeof((st_quirk_patterns)[0]) ), |
284 | sizeof(st_quirk_patterns[0]), &priority); |
285 | if (finger != NULL((void *)0)) { |
286 | st->quirks = finger->quirkdata.quirks; |
287 | st->mode = finger->quirkdata.mode; |
288 | CLR(st->flags, ST_MODE_BLKSIZE | ST_MODE_DENSITY)((st->flags) &= ~(0x00040000 | 0x00010000)); |
289 | if (st->mode.blksize != 0) |
290 | SET(st->flags, ST_MODE_BLKSIZE)((st->flags) |= (0x00040000)); |
291 | if (st->mode.density != 0) |
292 | SET(st->flags, ST_MODE_DENSITY)((st->flags) |= (0x00010000)); |
293 | } |
294 | printf("\n"); |
295 | |
296 | scsi_xsh_set(&st->sc_xsh, link, ststart); |
297 | |
298 | /* Set up the buf queue for this device. */ |
299 | bufq_init(&st->sc_bufq, BUFQ_FIFO0); |
300 | |
301 | /* Start up with media position unknown. */ |
302 | st->media_fileno = -1; |
303 | st->media_blkno = -1; |
304 | st->media_eom = -1; |
305 | |
306 | /* |
307 | * Reset the media loaded flag, sometimes the data |
308 | * acquired at boot time is not quite accurate. This |
309 | * will be checked again at the first open. |
310 | */ |
311 | CLR(link->flags, SDEV_MEDIA_LOADED)((link->flags) &= ~(0x0002)); |
312 | } |
313 | |
314 | int |
315 | stactivate(struct device *self, int act) |
316 | { |
317 | struct st_softc *st = (struct st_softc *)self; |
318 | |
319 | switch (act) { |
320 | case DVACT_DEACTIVATE1: |
321 | SET(st->flags, ST_DYING)((st->flags) |= (0x00004000)); |
322 | scsi_xsh_del(&st->sc_xsh); |
323 | break; |
324 | } |
325 | |
326 | return 0; |
327 | } |
328 | |
329 | int |
330 | stdetach(struct device *self, int flags) |
331 | { |
332 | struct st_softc *st = (struct st_softc *)self; |
333 | int cmaj, mn; |
334 | |
335 | bufq_drain(&st->sc_bufq); |
336 | |
337 | /* Locate the lowest minor number to be detached. */ |
338 | mn = STMINOR(self->dv_unit, 0)(((self->dv_unit) << 4) + (0)); |
339 | |
340 | for (cmaj = 0; cmaj < nchrdev; cmaj++) |
341 | if (cdevsw[cmaj].d_open == stopen) |
342 | vdevgone(cmaj, mn, mn + MAXSTMODES16 - 1, VCHR); |
343 | |
344 | bufq_destroy(&st->sc_bufq); |
345 | |
346 | return 0; |
347 | } |
348 | |
349 | /* |
350 | * open the device. |
351 | */ |
352 | int |
353 | stopen(dev_t dev, int flags, int fmt, struct proc *p) |
354 | { |
355 | struct scsi_link *link; |
356 | struct st_softc *st; |
357 | int error = 0; |
358 | |
359 | st = stlookup(STUNIT(dev))(struct st_softc *)device_lookup(&st_cd, (((((unsigned)(( dev) & 0xff) | (((dev) & 0xffff0000) >> 8)) >> 4) ))); |
360 | if (st == NULL((void *)0)) |
361 | return ENXIO6; |
362 | if (ISSET(st->flags, ST_DYING)((st->flags) & (0x00004000))) { |
363 | error = ENXIO6; |
364 | goto done; |
365 | } |
366 | link = st->sc_link; |
367 | |
368 | if (ISSET(flags, FWRITE)((flags) & (0x0002)) && ISSET(link->flags, SDEV_READONLY)((link->flags) & (0x0004))) { |
369 | error = EACCES13; |
370 | goto done; |
371 | } |
372 | |
373 | SC_DEBUG(link, SDEV_DB1, ("open: dev=0x%x (unit %d (of %d))\n", dev, |
374 | STUNIT(dev), st_cd.cd_ndevs)); |
375 | |
376 | /* |
377 | * Tape is an exclusive media. Only one open at a time. |
378 | */ |
379 | if (ISSET(link->flags, SDEV_OPEN)((link->flags) & (0x0008))) { |
380 | SC_DEBUG(link, SDEV_DB4, ("already open\n")); |
381 | error = EBUSY16; |
382 | goto done; |
383 | } |
384 | |
385 | /* Use st_interpret_sense() now. */ |
386 | SET(link->flags, SDEV_OPEN)((link->flags) |= (0x0008)); |
387 | |
388 | /* |
389 | * Check the unit status. This clears any outstanding errors and |
390 | * will ensure that media is present. |
391 | */ |
392 | error = scsi_test_unit_ready(link, TEST_READY_RETRIES5, |
393 | SCSI_SILENT0x00020 | SCSI_IGNORE_MEDIA_CHANGE0x00080 | |
394 | SCSI_IGNORE_ILLEGAL_REQUEST0x00100); |
395 | |
396 | /* |
397 | * Terminate any existing mount session if there is no media. |
398 | */ |
399 | if (!ISSET(link->flags, SDEV_MEDIA_LOADED)((link->flags) & (0x0002))) |
400 | st_unmount(st, NOEJECT0, DOREWIND1); |
401 | |
402 | if (error != 0) { |
403 | CLR(link->flags, SDEV_OPEN)((link->flags) &= ~(0x0008)); |
404 | goto done; |
405 | } |
406 | |
407 | error = st_mount_tape(st, flags); |
408 | if (error != 0) { |
409 | CLR(link->flags, SDEV_OPEN)((link->flags) &= ~(0x0008)); |
410 | goto done; |
411 | } |
412 | |
413 | /* |
414 | * Make sure that a tape opened in write-only mode will have |
415 | * file marks written on it when closed, even if not written to. |
416 | * This is for SUN compatibility |
417 | */ |
418 | if ((flags & O_ACCMODE0x0003) == FWRITE0x0002) |
419 | SET(st->flags, ST_WRITTEN)((st->flags) |= (0x00000004)); |
420 | |
421 | done: |
422 | SC_DEBUG(link, SDEV_DB2, ("open complete\n")); |
423 | device_unref(&st->sc_dev); |
424 | return error; |
425 | } |
426 | |
427 | /* |
428 | * close the device.. only called if we are the LAST |
429 | * occurrence of an open device |
430 | */ |
431 | int |
432 | stclose(dev_t dev, int flags, int mode, struct proc *p) |
433 | { |
434 | struct scsi_link *link; |
435 | struct st_softc *st; |
436 | int error = 0; |
437 | |
438 | st = stlookup(STUNIT(dev))(struct st_softc *)device_lookup(&st_cd, (((((unsigned)(( dev) & 0xff) | (((dev) & 0xffff0000) >> 8)) >> 4) ))); |
439 | if (st == NULL((void *)0)) |
440 | return ENXIO6; |
441 | if (ISSET(st->flags, ST_DYING)((st->flags) & (0x00004000))) { |
442 | error = ENXIO6; |
443 | goto done; |
444 | } |
445 | link = st->sc_link; |
446 | |
447 | SC_DEBUG(link, SDEV_DB1, ("closing\n")); |
448 | |
449 | if (ISSET(st->flags, ST_WRITTEN)((st->flags) & (0x00000004)) && !ISSET(st->flags, ST_FM_WRITTEN)((st->flags) & (0x00000100))) |
450 | st_write_filemarks(st, 1, 0); |
451 | |
452 | switch (STMODE(dev)( ((unsigned)((dev) & 0xff) | (((dev) & 0xffff0000) >> 8)) & 0x03)) { |
453 | case 0: /* /dev/rstN */ |
454 | st_unmount(st, NOEJECT0, DOREWIND1); |
455 | break; |
456 | case 1: /* /dev/nrstN */ |
457 | st_unmount(st, NOEJECT0, NOREWIND0); |
458 | break; |
459 | case 2: /* /dev/erstN */ |
460 | st_unmount(st, EJECT1, DOREWIND1); |
461 | break; |
462 | case 3: /* /dev/enrstN */ |
463 | st_unmount(st, EJECT1, NOREWIND0); |
464 | break; |
465 | } |
466 | CLR(link->flags, SDEV_OPEN)((link->flags) &= ~(0x0008)); |
467 | scsi_xsh_del(&st->sc_xsh); |
468 | |
469 | done: |
470 | device_unref(&st->sc_dev); |
471 | return error; |
472 | } |
473 | |
474 | /* |
475 | * Start a new mount session if needed. |
476 | */ |
477 | int |
478 | st_mount_tape(struct st_softc *st, int flags) |
479 | { |
480 | struct scsi_link *link = st->sc_link; |
481 | int error = 0; |
482 | |
483 | if (ISSET(st->flags, ST_MOUNTED)((st->flags) & (0x00000800))) |
484 | return 0; |
485 | |
486 | SC_DEBUG(link, SDEV_DB1, ("mounting\n")); |
487 | |
488 | /* |
489 | * Assume the media is new and give it a chance to |
490 | * to do a 'load' instruction. |
491 | */ |
492 | if ((error = st_load(st, LD_LOAD0x01, 0)) != 0) |
493 | goto done; |
494 | |
495 | /* |
496 | * Throw another dummy instruction to catch |
497 | * 'Unit attention' errors. Some drives appear to give |
498 | * these after doing a Load instruction. |
499 | * (notably some DAT drives) |
500 | */ |
501 | /* XXX */ |
502 | scsi_test_unit_ready(link, TEST_READY_RETRIES5, SCSI_SILENT0x00020); |
503 | |
504 | /* |
505 | * Some devices can't tell you much until they have been |
506 | * asked to look at the media. This quirk does this. |
507 | */ |
508 | if (ISSET(st->quirks, ST_Q_SENSE_HELP)((st->quirks) & (0x0001))) |
509 | if ((error = st_touch_tape(st)) != 0) |
510 | return error; |
511 | /* |
512 | * Load the physical device parameters |
513 | * loads: blkmin, blkmax |
514 | */ |
515 | if (!ISSET(link->flags, SDEV_ATAPI)((link->flags) & (0x0200)) && |
516 | (error = st_read_block_limits(st, 0)) != 0) |
517 | goto done; |
518 | |
519 | /* |
520 | * Load the media dependent parameters |
521 | * includes: media_blksize,media_density |
522 | * As we have a tape in, it should be reflected here. |
523 | * If not you may need the "quirk" above. |
524 | */ |
525 | if ((error = st_mode_sense(st, 0)) != 0) |
526 | goto done; |
527 | |
528 | /* |
529 | * If we have gained a permanent density from somewhere, |
530 | * then use it in preference to the one supplied by |
531 | * default by the driver. |
532 | */ |
533 | if (ISSET(st->flags, ST_MODE_DENSITY)((st->flags) & (0x00010000))) |
534 | st->density = st->mode.density; |
535 | else |
536 | st->density = st->media_density; |
537 | /* |
538 | * If we have gained a permanent blocksize |
539 | * then use it in preference to the one supplied by |
540 | * default by the driver. |
541 | */ |
542 | CLR(st->flags, ST_FIXEDBLOCKS)((st->flags) &= ~(0x00000008)); |
543 | if (ISSET(st->flags, ST_MODE_BLKSIZE)((st->flags) & (0x00040000))) { |
544 | st->blksize = st->mode.blksize; |
545 | if (st->blksize) |
546 | SET(st->flags, ST_FIXEDBLOCKS)((st->flags) |= (0x00000008)); |
547 | } else { |
548 | if ((error = st_decide_mode(st, 0)) != 0) |
549 | goto done; |
550 | } |
551 | if ((error = st_mode_select(st, 0)) != 0) { |
552 | printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); |
553 | goto done; |
554 | } |
555 | scsi_prevent(link, PR_PREVENT0x01, |
556 | SCSI_IGNORE_ILLEGAL_REQUEST0x00100 | SCSI_IGNORE_NOT_READY0x00040); |
557 | SET(st->flags, ST_MOUNTED)((st->flags) |= (0x00000800)); |
558 | SET(link->flags, SDEV_MEDIA_LOADED)((link->flags) |= (0x0002)); /* move earlier? */ |
559 | st->media_fileno = 0; |
560 | st->media_blkno = 0; |
561 | st->media_eom = -1; |
562 | |
563 | done: |
564 | return error; |
565 | } |
566 | |
567 | /* |
568 | * End the present mount session. |
569 | * Rewind, and optionally eject the tape. |
570 | * Reset various flags to indicate that all new |
571 | * operations require another mount operation |
572 | */ |
573 | void |
574 | st_unmount(struct st_softc *st, int eject, int rewind) |
575 | { |
576 | struct scsi_link *link = st->sc_link; |
577 | int nmarks; |
578 | |
579 | if (eject == NOEJECT0 && rewind == NOREWIND0) { |
580 | if (ISSET(link->flags, SDEV_MEDIA_LOADED)((link->flags) & (0x0002))) |
581 | return; |
582 | } |
583 | |
584 | st->media_fileno = -1; |
585 | st->media_blkno = -1; |
586 | |
587 | if (!ISSET(st->flags, ST_MOUNTED)((st->flags) & (0x00000800))) |
588 | return; |
589 | SC_DEBUG(link, SDEV_DB1, ("unmounting\n")); |
590 | st_check_eod(st, 0, &nmarks, SCSI_IGNORE_NOT_READY0x00040); |
591 | if (rewind == DOREWIND1) |
592 | st_rewind(st, 0, SCSI_IGNORE_NOT_READY0x00040); |
593 | scsi_prevent(link, PR_ALLOW0x00, |
594 | SCSI_IGNORE_ILLEGAL_REQUEST0x00100 | SCSI_IGNORE_NOT_READY0x00040); |
595 | if (eject == EJECT1) |
596 | st_load(st, LD_UNLOAD0x00, SCSI_IGNORE_NOT_READY0x00040); |
597 | CLR(st->flags, ST_MOUNTED)((st->flags) &= ~(0x00000800)); |
598 | CLR(link->flags, SDEV_MEDIA_LOADED)((link->flags) &= ~(0x0002)); |
599 | } |
600 | |
601 | /* |
602 | * Given all we know about the device, media, mode, 'quirks' and |
603 | * initial operation, make a decision as to how we should be set |
604 | * to run (regarding blocking and EOD marks) |
605 | */ |
606 | int |
607 | st_decide_mode(struct st_softc *st, int first_read) |
608 | { |
609 | struct scsi_link *link = st->sc_link; |
610 | |
611 | SC_DEBUG(link, SDEV_DB2, ("starting block mode decision\n")); |
612 | |
613 | /* ATAPI tapes are always fixed blocksize. */ |
614 | if (ISSET(link->flags, SDEV_ATAPI)((link->flags) & (0x0200))) { |
615 | SET(st->flags, ST_FIXEDBLOCKS)((st->flags) |= (0x00000008)); |
616 | if (st->media_blksize > 0) |
617 | st->blksize = st->media_blksize; |
618 | else |
619 | st->blksize = DEF_FIXED_BSIZE512; |
620 | goto done; |
621 | } |
622 | |
623 | /* |
624 | * If the drive can only handle fixed-length blocks and only at |
625 | * one size, perhaps we should just do that. |
626 | */ |
627 | if (st->blkmin && (st->blkmin == st->blkmax)) { |
628 | SET(st->flags, ST_FIXEDBLOCKS)((st->flags) |= (0x00000008)); |
629 | st->blksize = st->blkmin; |
630 | SC_DEBUG(link, SDEV_DB3, |
631 | ("blkmin == blkmax of %d\n", st->blkmin)); |
632 | goto done; |
633 | } |
634 | /* |
635 | * If the tape density mandates (or even suggests) use of fixed |
636 | * or variable-length blocks, comply. |
637 | */ |
638 | switch (st->density) { |
639 | case HALFINCH_8000x01: |
640 | case HALFINCH_16000x02: |
641 | case HALFINCH_62500x03: |
642 | case DDS0x13: |
643 | CLR(st->flags, ST_FIXEDBLOCKS)((st->flags) &= ~(0x00000008)); |
644 | st->blksize = 0; |
645 | SC_DEBUG(link, SDEV_DB3, ("density specified variable\n")); |
646 | goto done; |
647 | case QIC_110x04: |
648 | case QIC_240x05: |
649 | case QIC_1200x0f: |
650 | case QIC_1500x10: |
651 | case QIC_5250x11: |
652 | case QIC_13200x12: |
653 | SET(st->flags, ST_FIXEDBLOCKS)((st->flags) |= (0x00000008)); |
654 | if (st->media_blksize > 0) |
655 | st->blksize = st->media_blksize; |
656 | else |
657 | st->blksize = DEF_FIXED_BSIZE512; |
658 | SC_DEBUG(link, SDEV_DB3, ("density specified fixed\n")); |
659 | goto done; |
660 | } |
661 | /* |
662 | * If we're about to read the tape, perhaps we should choose |
663 | * fixed or variable-length blocks and block size according to |
664 | * what the drive found on the tape. |
665 | */ |
666 | if (first_read) { |
667 | if (st->media_blksize > 0) |
668 | SET(st->flags, ST_FIXEDBLOCKS)((st->flags) |= (0x00000008)); |
669 | else |
670 | CLR(st->flags, ST_FIXEDBLOCKS)((st->flags) &= ~(0x00000008)); |
671 | st->blksize = st->media_blksize; |
672 | SC_DEBUG(link, SDEV_DB3, |
673 | ("Used media_blksize of %d\n", st->media_blksize)); |
674 | goto done; |
675 | } |
676 | /* |
677 | * We're getting no hints from any direction. Choose variable- |
678 | * length blocks arbitrarily. |
679 | */ |
680 | CLR(st->flags, ST_FIXEDBLOCKS)((st->flags) &= ~(0x00000008)); |
681 | st->blksize = 0; |
682 | SC_DEBUG(link, SDEV_DB3, |
683 | ("Give up and default to variable mode\n")); |
684 | |
685 | done: |
686 | /* |
687 | * Decide whether or not to write two file marks to signify end- |
688 | * of-data. Make the decision as a function of density. If |
689 | * the decision is not to use a second file mark, the SCSI BLANK |
690 | * CHECK condition code will be recognized as end-of-data when |
691 | * first read. |
692 | * (I think this should be a by-product of fixed/variable..julian) |
693 | */ |
694 | switch (st->density) { |
695 | /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ |
696 | case QIC_110x04: |
697 | case QIC_240x05: |
698 | case QIC_1200x0f: |
699 | case QIC_1500x10: |
700 | case QIC_5250x11: |
701 | case QIC_13200x12: |
702 | CLR(st->flags, ST_2FM_AT_EOD)((st->flags) &= ~(0x00000400)); |
703 | break; |
704 | default: |
705 | SET(st->flags, ST_2FM_AT_EOD)((st->flags) |= (0x00000400)); |
706 | } |
707 | return 0; |
708 | } |
709 | |
710 | /* |
711 | * Actually translate the requested transfer into |
712 | * one the physical driver can understand |
713 | * The transfer is described by a buf and will include |
714 | * only one physical transfer. |
715 | */ |
716 | void |
717 | ststrategy(struct buf *bp) |
718 | { |
719 | struct scsi_link *link; |
720 | struct st_softc *st; |
721 | int s; |
722 | |
723 | st = stlookup(STUNIT(bp->b_dev))(struct st_softc *)device_lookup(&st_cd, (((((unsigned)(( bp->b_dev) & 0xff) | (((bp->b_dev) & 0xffff0000 ) >> 8)) >> 4) ))); |
724 | if (st == NULL((void *)0)) { |
725 | bp->b_error = ENXIO6; |
726 | goto bad; |
727 | } |
728 | if (ISSET(st->flags, ST_DYING)((st->flags) & (0x00004000))) { |
729 | bp->b_error = ENXIO6; |
730 | goto bad; |
731 | } |
732 | link = st->sc_link; |
Value stored to 'link' is never read | |
733 | |
734 | SC_DEBUG(link, SDEV_DB2, ("ststrategy: %ld bytes @ blk %lld\n", |
735 | bp->b_bcount, (long long)bp->b_blkno)); |
736 | |
737 | /* |
738 | * If it's a null transfer, return immediately. |
739 | */ |
740 | if (bp->b_bcount == 0) |
741 | goto done; |
742 | /* |
743 | * Odd sized request on fixed drives are verboten |
744 | */ |
745 | if (ISSET(st->flags, ST_FIXEDBLOCKS)((st->flags) & (0x00000008))) { |
746 | if (bp->b_bcount % st->blksize) { |
747 | printf("%s: bad request, must be multiple of %d\n", |
748 | st->sc_dev.dv_xname, st->blksize); |
749 | bp->b_error = EIO5; |
750 | goto bad; |
751 | } |
752 | } |
753 | /* |
754 | * as are out-of-range requests on variable drives. |
755 | */ |
756 | else if (bp->b_bcount < st->blkmin || |
757 | (st->blkmax && bp->b_bcount > st->blkmax)) { |
758 | printf("%s: bad request, must be between %d and %d\n", |
759 | st->sc_dev.dv_xname, st->blkmin, st->blkmax); |
760 | bp->b_error = EIO5; |
761 | goto bad; |
762 | } |
763 | |
764 | /* |
765 | * Place it in the queue of activities for this tape |
766 | * at the end (a bit silly because we only have on user.. |
767 | * (but it could fork())) |
768 | */ |
769 | bufq_queue(&st->sc_bufq, bp); |
770 | |
771 | /* |
772 | * Tell the device to get going on the transfer if it's |
773 | * not doing anything, otherwise just wait for completion |
774 | * (All a bit silly if we're only allowing 1 open but..) |
775 | */ |
776 | scsi_xsh_add(&st->sc_xsh); |
777 | |
778 | device_unref(&st->sc_dev); |
779 | return; |
780 | bad: |
781 | SET(bp->b_flags, B_ERROR)((bp->b_flags) |= (0x00000400)); |
782 | done: |
783 | /* Set b_resid to indicate no xfer was done. */ |
784 | bp->b_resid = bp->b_bcount; |
785 | s = splbio()splraise(0x6); |
786 | biodone(bp); |
787 | splx(s)spllower(s); |
788 | if (st) |
789 | device_unref(&st->sc_dev); |
790 | } |
791 | |
792 | void |
793 | ststart(struct scsi_xfer *xs) |
794 | { |
795 | struct scsi_link *link = xs->sc_link; |
796 | struct st_softc *st = link->device_softc; |
797 | struct buf *bp; |
798 | struct scsi_rw_tape *cmd; |
799 | int s; |
800 | |
801 | SC_DEBUG(link, SDEV_DB2, ("ststart\n")); |
802 | |
803 | if (ISSET(st->flags, ST_DYING)((st->flags) & (0x00004000))) { |
804 | scsi_xs_put(xs); |
805 | return; |
806 | } |
807 | |
808 | /* |
809 | * if the device has been unmounted by the user |
810 | * then throw away all requests until done |
811 | */ |
812 | if (!ISSET(st->flags, ST_MOUNTED)((st->flags) & (0x00000800)) || |
813 | !ISSET(link->flags, SDEV_MEDIA_LOADED)((link->flags) & (0x0002))) { |
814 | /* make sure that one implies the other.. */ |
815 | CLR(link->flags, SDEV_MEDIA_LOADED)((link->flags) &= ~(0x0002)); |
816 | bufq_drain(&st->sc_bufq); |
817 | scsi_xs_put(xs); |
818 | return; |
819 | } |
820 | |
821 | for (;;) { |
822 | bp = bufq_dequeue(&st->sc_bufq); |
823 | if (bp == NULL((void *)0)) { |
824 | scsi_xs_put(xs); |
825 | return; |
826 | } |
827 | |
828 | /* |
829 | * Only FIXEDBLOCK devices have pending I/O or space |
830 | * operations. |
831 | */ |
832 | if (ISSET(st->flags, ST_FIXEDBLOCKS)((st->flags) & (0x00000008))) { |
833 | /* |
834 | * If we are at a filemark but have not reported it yet |
835 | * then we should report it now |
836 | */ |
837 | if (ISSET(st->flags, ST_AT_FILEMARK)((st->flags) & (0x00000010))) { |
838 | if ((bp->b_flags & B_READ0x00008000) == B_WRITE0x00000000) { |
839 | /* |
840 | * Handling of ST_AT_FILEMARK in |
841 | * st_space will fill in the right file |
842 | * mark count. |
843 | * Back up over filemark |
844 | */ |
845 | if (st_space(st, 0, SP_FILEMARKS0x01, 0)) { |
846 | SET(bp->b_flags, B_ERROR)((bp->b_flags) |= (0x00000400)); |
847 | bp->b_resid = bp->b_bcount; |
848 | bp->b_error = EIO5; |
849 | s = splbio()splraise(0x6); |
850 | biodone(bp); |
851 | splx(s)spllower(s); |
852 | continue; |
853 | } |
854 | } else { |
855 | bp->b_resid = bp->b_bcount; |
856 | bp->b_error = 0; |
857 | CLR(bp->b_flags, B_ERROR)((bp->b_flags) &= ~(0x00000400)); |
858 | CLR(st->flags, ST_AT_FILEMARK)((st->flags) &= ~(0x00000010)); |
859 | s = splbio()splraise(0x6); |
860 | biodone(bp); |
861 | splx(s)spllower(s); |
862 | continue; /* seek more work */ |
863 | } |
864 | } |
865 | } |
866 | |
867 | /* |
868 | * If we are at EIO or EOM but have not reported it |
869 | * yet then we should report it now. |
870 | */ |
871 | if (ISSET(st->flags, ST_EOM_PENDING | ST_EIO_PENDING)((st->flags) & (0x00000040 | 0x00000020))) { |
872 | bp->b_resid = bp->b_bcount; |
873 | if (ISSET(st->flags, ST_EIO_PENDING)((st->flags) & (0x00000020))) { |
874 | bp->b_error = EIO5; |
875 | SET(bp->b_flags, B_ERROR)((bp->b_flags) |= (0x00000400)); |
876 | } |
877 | CLR(st->flags, ST_EOM_PENDING | ST_EIO_PENDING)((st->flags) &= ~(0x00000040 | 0x00000020)); |
878 | s = splbio()splraise(0x6); |
879 | biodone(bp); |
880 | splx(s)spllower(s); |
881 | continue; /* seek more work */ |
882 | } |
883 | break; |
884 | } |
885 | |
886 | /* |
887 | * Fill out the scsi command |
888 | */ |
889 | cmd = (struct scsi_rw_tape *)&xs->cmd; |
890 | bzero(cmd, sizeof(*cmd))__builtin_bzero((cmd), (sizeof(*cmd))); |
891 | if ((bp->b_flags & B_READ0x00008000) == B_WRITE0x00000000) { |
892 | cmd->opcode = WRITE0x0a; |
893 | CLR(st->flags, ST_FM_WRITTEN)((st->flags) &= ~(0x00000100)); |
894 | SET(st->flags, ST_WRITTEN)((st->flags) |= (0x00000004)); |
895 | SET(xs->flags, SCSI_DATA_OUT)((xs->flags) |= (0x01000)); |
896 | } else { |
897 | cmd->opcode = READ0x08; |
898 | SET(xs->flags, SCSI_DATA_IN)((xs->flags) |= (0x00800)); |
899 | } |
900 | |
901 | /* |
902 | * Handle "fixed-block-mode" tape drives by using the |
903 | * block count instead of the length. |
904 | */ |
905 | if (ISSET(st->flags, ST_FIXEDBLOCKS)((st->flags) & (0x00000008))) { |
906 | SET(cmd->byte2, SRW_FIXED)((cmd->byte2) |= (0x01)); |
907 | _lto3b(bp->b_bcount / st->blksize, cmd->len); |
908 | } else |
909 | _lto3b(bp->b_bcount, cmd->len); |
910 | |
911 | if (st->media_blkno != -1) { |
912 | /* Update block count now, errors will set it to -1. */ |
913 | if (ISSET(st->flags, ST_FIXEDBLOCKS)((st->flags) & (0x00000008))) |
914 | st->media_blkno += _3btol(cmd->len); |
915 | else if (_3btol(cmd->len) != 0) |
916 | st->media_blkno++; |
917 | } |
918 | |
919 | xs->cmdlen = sizeof(*cmd); |
920 | xs->timeout = ST_IO_TIME(3 * 60 * 1000); |
921 | xs->data = bp->b_data; |
922 | xs->datalen = bp->b_bcount; |
923 | xs->done = st_buf_done; |
924 | xs->cookie = bp; |
925 | xs->bp = bp; |
926 | |
927 | /* |
928 | * go ask the adapter to do all this for us |
929 | */ |
930 | scsi_xs_exec(xs); |
931 | |
932 | /* |
933 | * should we try do more work now? |
934 | */ |
935 | if (bufq_peek(&st->sc_bufq)) |
936 | scsi_xsh_add(&st->sc_xsh); |
937 | } |
938 | |
939 | void |
940 | st_buf_done(struct scsi_xfer *xs) |
941 | { |
942 | struct buf *bp = xs->cookie; |
943 | int error, s; |
944 | |
945 | switch (xs->error) { |
946 | case XS_NOERROR0: |
947 | bp->b_error = 0; |
948 | CLR(bp->b_flags, B_ERROR)((bp->b_flags) &= ~(0x00000400)); |
949 | bp->b_resid = xs->resid; |
950 | break; |
951 | |
952 | case XS_SENSE1: |
953 | case XS_SHORTSENSE6: |
954 | SC_DEBUG_SENSE(xs); |
955 | error = st_interpret_sense(xs); |
956 | if (error == 0) { |
957 | bp->b_error = 0; |
958 | CLR(bp->b_flags, B_ERROR)((bp->b_flags) &= ~(0x00000400)); |
959 | bp->b_resid = xs->resid; |
960 | break; |
961 | } |
962 | if (error != ERESTART-1) |
963 | xs->retries = 0; |
964 | goto retry; |
965 | |
966 | case XS_BUSY5: |
967 | if (xs->retries) { |
968 | if (scsi_delay(xs, 1) != ERESTART-1) |
969 | xs->retries = 0; |
970 | } |
971 | goto retry; |
972 | |
973 | case XS_TIMEOUT4: |
974 | retry: |
975 | if (xs->retries--) { |
976 | scsi_xs_exec(xs); |
977 | return; |
978 | } |
979 | /* FALLTHROUGH */ |
980 | |
981 | default: |
982 | bp->b_error = EIO5; |
983 | SET(bp->b_flags, B_ERROR)((bp->b_flags) |= (0x00000400)); |
984 | bp->b_resid = bp->b_bcount; |
985 | break; |
986 | } |
987 | |
988 | s = splbio()splraise(0x6); |
989 | biodone(bp); |
990 | splx(s)spllower(s); |
991 | scsi_xs_put(xs); |
992 | } |
993 | |
994 | void |
995 | stminphys(struct buf *bp) |
996 | { |
997 | struct scsi_link *link; |
998 | struct st_softc *sc; |
999 | |
1000 | sc = stlookup(STUNIT(bp->b_dev))(struct st_softc *)device_lookup(&st_cd, (((((unsigned)(( bp->b_dev) & 0xff) | (((bp->b_dev) & 0xffff0000 ) >> 8)) >> 4) ))); |
1001 | if (sc == NULL((void *)0)) |
1002 | return; |
1003 | link = sc->sc_link; |
1004 | |
1005 | if (link->bus->sb_adapter->dev_minphys != NULL((void *)0)) |
1006 | (*link->bus->sb_adapter->dev_minphys)(bp, link); |
1007 | else |
1008 | minphys(bp); |
1009 | |
1010 | device_unref(&sc->sc_dev); |
1011 | } |
1012 | |
1013 | int |
1014 | stread(dev_t dev, struct uio *uio, int iomode) |
1015 | { |
1016 | return physio(ststrategy, dev, B_READ0x00008000, stminphys, uio); |
1017 | } |
1018 | |
1019 | int |
1020 | stwrite(dev_t dev, struct uio *uio, int iomode) |
1021 | { |
1022 | return physio(ststrategy, dev, B_WRITE0x00000000, stminphys, uio); |
1023 | } |
1024 | |
1025 | /* |
1026 | * Perform special action on behalf of the user; |
1027 | * knows about the internals of this device |
1028 | */ |
1029 | int |
1030 | stioctl(dev_t dev, u_long cmd, caddr_t arg, int flag, struct proc *p) |
1031 | { |
1032 | int error = 0; |
1033 | int nmarks; |
1034 | int flags = 0; |
1035 | struct st_softc *st; |
1036 | int hold_blksize; |
1037 | u_int8_t hold_density; |
1038 | struct mtop *mt = (struct mtop *) arg; |
1039 | int number; |
1040 | |
1041 | /* |
1042 | * Find the device that the user is talking about |
1043 | */ |
1044 | st = stlookup(STUNIT(dev))(struct st_softc *)device_lookup(&st_cd, (((((unsigned)(( dev) & 0xff) | (((dev) & 0xffff0000) >> 8)) >> 4) ))); |
1045 | if (st == NULL((void *)0)) |
1046 | return ENXIO6; |
1047 | |
1048 | if (ISSET(st->flags, ST_DYING)((st->flags) & (0x00004000))) { |
1049 | error = ENXIO6; |
1050 | goto done; |
1051 | } |
1052 | |
1053 | hold_blksize = st->blksize; |
1054 | hold_density = st->density; |
1055 | |
1056 | switch (cmd) { |
1057 | |
1058 | case MTIOCGET((unsigned long)0x40000000 | ((sizeof(struct mtget) & 0x1fff ) << 16) | ((('m')) << 8) | ((2))): { |
1059 | struct mtget *g = (struct mtget *) arg; |
1060 | |
1061 | /* |
1062 | * (to get the current state of READONLY) |
1063 | */ |
1064 | error = st_mode_sense(st, SCSI_SILENT0x00020); |
1065 | if (error != 0) |
1066 | break; |
1067 | |
1068 | SC_DEBUG(st->sc_link, SDEV_DB1, ("[ioctl: get status]\n")); |
1069 | bzero(g, sizeof(struct mtget))__builtin_bzero((g), (sizeof(struct mtget))); |
1070 | g->mt_type = 0x7; /* Ultrix compat *//*? */ |
1071 | g->mt_blksiz = st->blksize; |
1072 | g->mt_density = st->density; |
1073 | g->mt_mblksiz = st->mode.blksize; |
1074 | g->mt_mdensity = st->mode.density; |
1075 | if (ISSET(st->sc_link->flags, SDEV_READONLY)((st->sc_link->flags) & (0x0004))) |
1076 | SET(g->mt_dsreg, MT_DS_RDONLY)((g->mt_dsreg) |= (0x10)); |
1077 | if (ISSET(st->flags, ST_MOUNTED)((st->flags) & (0x00000800))) |
1078 | SET(g->mt_dsreg, MT_DS_MOUNTED)((g->mt_dsreg) |= (0x03)); |
1079 | g->mt_resid = st->mt_resid; |
1080 | g->mt_erreg = st->mt_erreg; |
1081 | g->mt_fileno = st->media_fileno; |
1082 | g->mt_blkno = st->media_blkno; |
1083 | /* |
1084 | * clear latched errors. |
1085 | */ |
1086 | st->mt_resid = 0; |
1087 | st->mt_erreg = 0; |
1088 | break; |
1089 | } |
1090 | case MTIOCTOP((unsigned long)0x80000000 | ((sizeof(struct mtop) & 0x1fff ) << 16) | ((('m')) << 8) | ((1))): { |
1091 | |
1092 | SC_DEBUG(st->sc_link, SDEV_DB1, |
1093 | ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, mt->mt_count)); |
1094 | |
1095 | number = mt->mt_count; |
1096 | switch (mt->mt_op) { |
1097 | case MTWEOF0: /* write an end-of-file record */ |
1098 | error = st_write_filemarks(st, number, flags); |
1099 | break; |
1100 | case MTBSF2: /* backward space file */ |
1101 | number = -number; |
1102 | case MTFSF1: /* forward space file */ |
1103 | error = st_check_eod(st, 0, &nmarks, flags); |
1104 | if (error == 0) |
1105 | error = st_space(st, number - nmarks, |
1106 | SP_FILEMARKS0x01, flags); |
1107 | break; |
1108 | case MTBSR4: /* backward space record */ |
1109 | number = -number; |
1110 | case MTFSR3: /* forward space record */ |
1111 | error = st_check_eod(st, 1, &nmarks, flags); |
1112 | if (error == 0) |
1113 | error = st_space(st, number, SP_BLKS0x00, flags); |
1114 | break; |
1115 | case MTREW5: /* rewind */ |
1116 | error = st_rewind(st, 0, flags); |
1117 | break; |
1118 | case MTOFFL6: /* rewind and put the drive offline */ |
1119 | st_unmount(st, EJECT1, DOREWIND1); |
1120 | break; |
1121 | case MTNOP7: /* no operation, sets status only */ |
1122 | break; |
1123 | case MTRETEN8: /* retension the tape */ |
1124 | error = st_load(st, LD_RETENSION0x02, flags); |
1125 | if (error == 0) |
1126 | error = st_load(st, LD_LOAD0x01, flags); |
1127 | break; |
1128 | case MTEOM10: /* forward space to end of media */ |
1129 | error = st_check_eod(st, 0, &nmarks, flags); |
1130 | if (error == 0) |
1131 | error = st_space(st, 1, SP_EOM0x03, flags); |
1132 | break; |
1133 | case MTCACHE12: /* enable controller cache */ |
1134 | CLR(st->flags, ST_DONTBUFFER)((st->flags) &= ~(0x00001000)); |
1135 | goto try_new_value; |
1136 | case MTNOCACHE13: /* disable controller cache */ |
1137 | SET(st->flags, ST_DONTBUFFER)((st->flags) |= (0x00001000)); |
1138 | goto try_new_value; |
1139 | case MTERASE9: /* erase volume */ |
1140 | error = st_erase(st, number, flags); |
1141 | break; |
1142 | case MTSETBSIZ14: /* Set block size for device and mode. */ |
1143 | if (number == 0) { |
1144 | CLR(st->flags, ST_FIXEDBLOCKS)((st->flags) &= ~(0x00000008)); |
1145 | } else { |
1146 | if ((st->blkmin || st->blkmax) && |
1147 | (number < st->blkmin || |
1148 | number > st->blkmax)) { |
1149 | error = EINVAL22; |
1150 | break; |
1151 | } |
1152 | SET(st->flags, ST_FIXEDBLOCKS)((st->flags) |= (0x00000008)); |
1153 | } |
1154 | st->blksize = number; |
1155 | goto try_new_value; |
1156 | |
1157 | case MTSETDNSTY15: /* Set density for device and mode. */ |
1158 | if (number < 0 || number > SCSI_MAX_DENSITY_CODE0xff) { |
1159 | error = EINVAL22; |
1160 | break; |
1161 | } |
1162 | st->density = number; |
1163 | goto try_new_value; |
1164 | |
1165 | default: |
1166 | error = EINVAL22; |
1167 | } |
1168 | break; |
1169 | } |
1170 | case MTIOCIEOT((unsigned long)0x20000000 | ((0 & 0x1fff) << 16) | ((('m')) << 8) | ((3))): |
1171 | case MTIOCEEOT((unsigned long)0x20000000 | ((0 & 0x1fff) << 16) | ((('m')) << 8) | ((4))): |
1172 | break; |
1173 | |
1174 | #if 0 |
1175 | case MTIOCRDSPOS((unsigned long)0x40000000 | ((sizeof(u_int32_t) & 0x1fff ) << 16) | ((('m')) << 8) | ((5))): |
1176 | error = st_rdpos(st, 0, (u_int32_t *) arg); |
1177 | break; |
1178 | |
1179 | case MTIOCRDHPOS((unsigned long)0x40000000 | ((sizeof(u_int32_t) & 0x1fff ) << 16) | ((('m')) << 8) | ((6))): |
1180 | error = st_rdpos(st, 1, (u_int32_t *) arg); |
1181 | break; |
1182 | |
1183 | case MTIOCSLOCATE((unsigned long)0x80000000 | ((sizeof(u_int32_t) & 0x1fff ) << 16) | ((('m')) << 8) | ((5))): |
1184 | error = st_setpos(st, 0, (u_int32_t *) arg); |
1185 | break; |
1186 | |
1187 | case MTIOCHLOCATE((unsigned long)0x80000000 | ((sizeof(u_int32_t) & 0x1fff ) << 16) | ((('m')) << 8) | ((6))): |
1188 | error = st_setpos(st, 1, (u_int32_t *) arg); |
1189 | break; |
1190 | #endif /* 0 */ |
1191 | |
1192 | default: |
1193 | error = scsi_do_ioctl(st->sc_link, cmd, arg, flag); |
1194 | break; |
1195 | } |
1196 | goto done; |
1197 | |
1198 | try_new_value: |
1199 | /* |
1200 | * Check that the mode being asked for is aggreeable to the |
1201 | * drive. If not, put it back the way it was. |
1202 | */ |
1203 | if ((error = st_mode_select(st, 0)) != 0) {/* put it back as it was */ |
1204 | printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); |
1205 | st->density = hold_density; |
1206 | st->blksize = hold_blksize; |
1207 | if (st->blksize) |
1208 | SET(st->flags, ST_FIXEDBLOCKS)((st->flags) |= (0x00000008)); |
1209 | else |
1210 | CLR(st->flags, ST_FIXEDBLOCKS)((st->flags) &= ~(0x00000008)); |
1211 | goto done; |
1212 | } |
1213 | /* |
1214 | * As the drive liked it, if we are setting a new default, |
1215 | * set it into the structures as such. |
1216 | */ |
1217 | switch (mt->mt_op) { |
1218 | case MTSETBSIZ14: |
1219 | st->mode.blksize = st->blksize; |
1220 | SET(st->flags, ST_MODE_BLKSIZE)((st->flags) |= (0x00040000)); |
1221 | break; |
1222 | case MTSETDNSTY15: |
1223 | st->mode.density = st->density; |
1224 | SET(st->flags, ST_MODE_DENSITY)((st->flags) |= (0x00010000)); |
1225 | break; |
1226 | } |
1227 | |
1228 | done: |
1229 | device_unref(&st->sc_dev); |
1230 | return error; |
1231 | } |
1232 | |
1233 | /* |
1234 | * Do a synchronous read. |
1235 | */ |
1236 | int |
1237 | st_read(struct st_softc *st, char *buf, int size, int flags) |
1238 | { |
1239 | struct scsi_rw_tape *cmd; |
1240 | struct scsi_xfer *xs; |
1241 | int error; |
1242 | |
1243 | if (size == 0) |
1244 | return 0; |
1245 | |
1246 | xs = scsi_xs_get(st->sc_link, flags | SCSI_DATA_IN0x00800); |
1247 | if (xs == NULL((void *)0)) |
1248 | return ENOMEM12; |
1249 | xs->cmdlen = sizeof(*cmd); |
1250 | xs->data = buf; |
1251 | xs->datalen = size; |
1252 | xs->retries = 0; |
1253 | xs->timeout = ST_IO_TIME(3 * 60 * 1000); |
1254 | |
1255 | cmd = (struct scsi_rw_tape *)&xs->cmd; |
1256 | cmd->opcode = READ0x08; |
1257 | if (ISSET(st->flags, ST_FIXEDBLOCKS)((st->flags) & (0x00000008))) { |
1258 | SET(cmd->byte2, SRW_FIXED)((cmd->byte2) |= (0x01)); |
1259 | _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE512), |
1260 | cmd->len); |
1261 | } else |
1262 | _lto3b(size, cmd->len); |
1263 | |
1264 | error = scsi_xs_sync(xs); |
1265 | scsi_xs_put(xs); |
1266 | |
1267 | return error; |
1268 | } |
1269 | |
1270 | /* |
1271 | * Ask the drive what its min and max blk sizes are. |
1272 | */ |
1273 | int |
1274 | st_read_block_limits(struct st_softc *st, int flags) |
1275 | { |
1276 | struct scsi_block_limits_data *block_limits = NULL((void *)0); |
1277 | struct scsi_block_limits *cmd; |
1278 | struct scsi_link *link = st->sc_link; |
1279 | struct scsi_xfer *xs; |
1280 | int error = 0; |
1281 | |
1282 | if (ISSET(link->flags, SDEV_MEDIA_LOADED)((link->flags) & (0x0002))) |
1283 | return 0; |
1284 | |
1285 | block_limits = dma_alloc(sizeof(*block_limits), PR_NOWAIT0x0002); |
1286 | if (block_limits == NULL((void *)0)) |
1287 | return ENOMEM12; |
1288 | |
1289 | xs = scsi_xs_get(link, flags | SCSI_DATA_IN0x00800); |
1290 | if (xs == NULL((void *)0)) { |
1291 | error = ENOMEM12; |
1292 | goto done; |
1293 | } |
1294 | |
1295 | xs->cmdlen = sizeof(*cmd); |
1296 | xs->data = (void *)block_limits; |
1297 | xs->datalen = sizeof(*block_limits); |
1298 | xs->timeout = ST_CTL_TIME(30 * 1000); |
1299 | |
1300 | cmd = (struct scsi_block_limits *)&xs->cmd; |
1301 | cmd->opcode = READ_BLOCK_LIMITS0x05; |
1302 | |
1303 | error = scsi_xs_sync(xs); |
1304 | scsi_xs_put(xs); |
1305 | |
1306 | if (error == 0) { |
1307 | st->blkmin = _2btol(block_limits->min_length); |
1308 | st->blkmax = _3btol(block_limits->max_length); |
1309 | SC_DEBUG(link, SDEV_DB3, |
1310 | ("(%d <= blksize <= %d)\n", st->blkmin, st->blkmax)); |
1311 | } |
1312 | |
1313 | done: |
1314 | if (block_limits) |
1315 | dma_free(block_limits, sizeof(*block_limits)); |
1316 | return error; |
1317 | } |
1318 | |
1319 | /* |
1320 | * Get the scsi driver to send a full inquiry to the |
1321 | * device and use the results to fill out the global |
1322 | * parameter structure. |
1323 | * |
1324 | * called from: |
1325 | * attach |
1326 | * open |
1327 | * ioctl (to reset original blksize) |
1328 | */ |
1329 | int |
1330 | st_mode_sense(struct st_softc *st, int flags) |
1331 | { |
1332 | union scsi_mode_sense_buf *data = NULL((void *)0); |
1333 | struct scsi_link *link = st->sc_link; |
1334 | u_int64_t block_count; |
1335 | u_int32_t density, block_size; |
1336 | u_char *page0 = NULL((void *)0); |
1337 | u_int8_t dev_spec; |
1338 | int error = 0, big; |
1339 | |
1340 | data = dma_alloc(sizeof(*data), PR_NOWAIT0x0002); |
1341 | if (data == NULL((void *)0)) |
1342 | return ENOMEM12; |
1343 | |
1344 | /* |
1345 | * Ask for page 0 (vendor specific) mode sense data. |
1346 | */ |
1347 | density = 0; |
1348 | block_count = 0; |
1349 | block_size = 0; |
1350 | error = scsi_do_mode_sense(link, 0, data, (void **)&page0, 1, |
1351 | flags | SCSI_SILENT0x00020, &big); |
1352 | if (error != 0) |
1353 | goto done; |
1354 | scsi_parse_blkdesc(link, data, big, &density, &block_count, |
1355 | &block_size); |
1356 | |
1357 | /* It is valid for no page0 to be available. */ |
1358 | |
1359 | if (big) |
1360 | dev_spec = data->hdr_big.dev_spec; |
1361 | else |
1362 | dev_spec = data->hdr.dev_spec; |
1363 | |
1364 | if (ISSET(dev_spec, SMH_DSP_WRITE_PROT)((dev_spec) & (0x80))) |
1365 | SET(link->flags, SDEV_READONLY)((link->flags) |= (0x0004)); |
1366 | else |
1367 | CLR(link->flags, SDEV_READONLY)((link->flags) &= ~(0x0004)); |
1368 | |
1369 | st->media_blksize = block_size; |
1370 | st->media_density = density; |
1371 | |
1372 | SC_DEBUG(link, SDEV_DB3, |
1373 | ("density code 0x%x, %d-byte blocks, write-%s, %sbuffered\n", |
1374 | st->media_density, st->media_blksize, |
1375 | ISSET(link->flags, SDEV_READONLY) ? "protected" : "enabled", |
1376 | ISSET(dev_spec, SMH_DSP_BUFF_MODE) ? "" : "un")); |
1377 | |
1378 | SET(link->flags, SDEV_MEDIA_LOADED)((link->flags) |= (0x0002)); |
1379 | |
1380 | done: |
1381 | if (data) |
1382 | dma_free(data, sizeof(*data)); |
1383 | return error; |
1384 | } |
1385 | |
1386 | /* |
1387 | * Send a filled out parameter structure to the drive to |
1388 | * set it into the desire mode etc. |
1389 | */ |
1390 | int |
1391 | st_mode_select(struct st_softc *st, int flags) |
1392 | { |
1393 | union scsi_mode_sense_buf *inbuf = NULL((void *)0), *outbuf = NULL((void *)0); |
1394 | struct scsi_blk_desc general; |
1395 | struct scsi_link *link = st->sc_link; |
1396 | u_int8_t *page0 = NULL((void *)0); |
1397 | int error = 0, big, page0_size; |
1398 | |
1399 | inbuf = dma_alloc(sizeof(*inbuf), PR_NOWAIT0x0002); |
1400 | if (inbuf == NULL((void *)0)) { |
1401 | error = ENOMEM12; |
1402 | goto done; |
1403 | } |
1404 | outbuf = dma_alloc(sizeof(*outbuf), PR_NOWAIT0x0002 | PR_ZERO0x0008); |
1405 | if (outbuf == NULL((void *)0)) { |
1406 | error = ENOMEM12; |
1407 | goto done; |
1408 | } |
1409 | |
1410 | /* |
1411 | * This quirk deals with drives that have only one valid mode and think |
1412 | * this gives them license to reject all mode selects, even if the |
1413 | * selected mode is the one that is supported. |
1414 | */ |
1415 | if (ISSET(st->quirks, ST_Q_UNIMODAL)((st->quirks) & (0x0004))) { |
1416 | SC_DEBUG(link, SDEV_DB3, |
1417 | ("not setting density 0x%x blksize 0x%x\n", |
1418 | st->density, st->blksize)); |
1419 | error = 0; |
1420 | goto done; |
1421 | } |
1422 | |
1423 | if (ISSET(link->flags, SDEV_ATAPI)((link->flags) & (0x0200))) { |
1424 | error = 0; |
1425 | goto done; |
1426 | } |
1427 | |
1428 | bzero(&general, sizeof(general))__builtin_bzero((&general), (sizeof(general))); |
1429 | |
1430 | general.density = st->density; |
1431 | if (ISSET(st->flags, ST_FIXEDBLOCKS)((st->flags) & (0x00000008))) |
1432 | _lto3b(st->blksize, general.blklen); |
1433 | |
1434 | /* |
1435 | * Ask for page 0 (vendor specific) mode sense data. |
1436 | * |
1437 | * page0 == NULL is a valid situation. |
1438 | */ |
1439 | error = scsi_do_mode_sense(link, 0, inbuf, (void **)&page0, 1, |
1440 | flags | SCSI_SILENT0x00020, &big); |
1441 | if (error != 0) |
1442 | goto done; |
1443 | |
1444 | if (page0 == NULL((void *)0)) { |
1445 | page0_size = 0; |
1446 | } else if (big == 0) { |
1447 | page0_size = inbuf->hdr.data_length + |
1448 | sizeof(inbuf->hdr.data_length) - sizeof(inbuf->hdr) - |
1449 | inbuf->hdr.blk_desc_len; |
1450 | memcpy(&outbuf->buf[sizeof(outbuf->hdr)+ sizeof(general)],__builtin_memcpy((&outbuf->buf[sizeof(outbuf->hdr)+ sizeof(general)]), (page0), (page0_size)) |
1451 | page0, page0_size)__builtin_memcpy((&outbuf->buf[sizeof(outbuf->hdr)+ sizeof(general)]), (page0), (page0_size)); |
1452 | } else { |
1453 | page0_size = _2btol(inbuf->hdr_big.data_length) + |
1454 | sizeof(inbuf->hdr_big.data_length) - |
1455 | sizeof(inbuf->hdr_big) - |
1456 | _2btol(inbuf->hdr_big.blk_desc_len); |
1457 | memcpy(&outbuf->buf[sizeof(outbuf->hdr_big) + sizeof(general)],__builtin_memcpy((&outbuf->buf[sizeof(outbuf->hdr_big ) + sizeof(general)]), (page0), (page0_size)) |
1458 | page0, page0_size)__builtin_memcpy((&outbuf->buf[sizeof(outbuf->hdr_big ) + sizeof(general)]), (page0), (page0_size)); |
1459 | } |
1460 | |
1461 | /* |
1462 | * Set up for a mode select. |
1463 | */ |
1464 | if (big == 0) { |
1465 | outbuf->hdr.data_length = sizeof(outbuf->hdr) + |
1466 | sizeof(general) + page0_size - |
1467 | sizeof(outbuf->hdr.data_length); |
1468 | if (!ISSET(st->flags, ST_DONTBUFFER)((st->flags) & (0x00001000))) |
1469 | outbuf->hdr.dev_spec = SMH_DSP_BUFF_MODE_ON0x10; |
1470 | outbuf->hdr.blk_desc_len = sizeof(general); |
1471 | memcpy(&outbuf->buf[sizeof(outbuf->hdr)],__builtin_memcpy((&outbuf->buf[sizeof(outbuf->hdr)] ), (&general), (sizeof(general))) |
1472 | &general, sizeof(general))__builtin_memcpy((&outbuf->buf[sizeof(outbuf->hdr)] ), (&general), (sizeof(general))); |
1473 | error = scsi_mode_select(st->sc_link, 0, &outbuf->hdr, |
1474 | flags, ST_CTL_TIME(30 * 1000)); |
1475 | goto done; |
1476 | } |
1477 | |
1478 | /* MODE SENSE (10) header was returned, so use MODE SELECT (10). */ |
1479 | _lto2b((sizeof(outbuf->hdr_big) + sizeof(general) + page0_size - |
1480 | sizeof(outbuf->hdr_big.data_length)), outbuf->hdr_big.data_length); |
1481 | if (!ISSET(st->flags, ST_DONTBUFFER)((st->flags) & (0x00001000))) |
1482 | outbuf->hdr_big.dev_spec = SMH_DSP_BUFF_MODE_ON0x10; |
1483 | _lto2b(sizeof(general), outbuf->hdr_big.blk_desc_len); |
1484 | memcpy(&outbuf->buf[sizeof(outbuf->hdr_big)], &general,__builtin_memcpy((&outbuf->buf[sizeof(outbuf->hdr_big )]), (&general), (sizeof(general))) |
1485 | sizeof(general))__builtin_memcpy((&outbuf->buf[sizeof(outbuf->hdr_big )]), (&general), (sizeof(general))); |
1486 | |
1487 | error = scsi_mode_select_big(st->sc_link, 0, &outbuf->hdr_big, |
1488 | flags, ST_CTL_TIME(30 * 1000)); |
1489 | done: |
1490 | if (inbuf) |
1491 | dma_free(inbuf, sizeof(*inbuf)); |
1492 | if (outbuf) |
1493 | dma_free(outbuf, sizeof(*outbuf)); |
1494 | return error; |
1495 | } |
1496 | |
1497 | /* |
1498 | * issue an erase command |
1499 | */ |
1500 | int |
1501 | st_erase(struct st_softc *st, int full, int flags) |
1502 | { |
1503 | struct scsi_erase *cmd; |
1504 | struct scsi_xfer *xs; |
1505 | int error; |
1506 | |
1507 | xs = scsi_xs_get(st->sc_link, flags); |
1508 | if (xs == NULL((void *)0)) |
1509 | return ENOMEM12; |
1510 | xs->cmdlen = sizeof(*cmd); |
1511 | |
1512 | /* |
1513 | * Full erase means set LONG bit in erase command, which asks |
1514 | * the drive to erase the entire unit. Without this bit, we're |
1515 | * asking the drive to write an erase gap. |
1516 | */ |
1517 | cmd = (struct scsi_erase *)&xs->cmd; |
1518 | cmd->opcode = ERASE0x19; |
1519 | if (full) { |
1520 | cmd->byte2 = SE_IMMED0x02|SE_LONG0x01; |
1521 | xs->timeout = ST_SPC_TIME(4 * 60 * 60 * 1000); |
1522 | } else { |
1523 | cmd->byte2 = SE_IMMED0x02; |
1524 | xs->timeout = ST_IO_TIME(3 * 60 * 1000); |
1525 | } |
1526 | |
1527 | /* |
1528 | * XXX We always do this asynchronously, for now. How long should |
1529 | * we wait if we want to (eventually) to it synchronously? |
1530 | */ |
1531 | error = scsi_xs_sync(xs); |
1532 | scsi_xs_put(xs); |
1533 | |
1534 | return error; |
1535 | } |
1536 | |
1537 | /* |
1538 | * skip N blocks/filemarks/seq filemarks/eom |
1539 | */ |
1540 | int |
1541 | st_space(struct st_softc *st, int number, u_int what, int flags) |
1542 | { |
1543 | struct scsi_space *cmd; |
1544 | struct scsi_xfer *xs; |
1545 | int error; |
1546 | |
1547 | switch (what) { |
1548 | case SP_BLKS0x00: |
1549 | if (ISSET(st->flags, ST_PER_ACTION)((st->flags) & ((0x00000010 | 0x00000020 | 0x00000040 | 0x00000200)))) { |
1550 | if (number > 0) { |
1551 | CLR(st->flags, ST_PER_ACTION)((st->flags) &= ~((0x00000010 | 0x00000020 | 0x00000040 | 0x00000200))); |
1552 | return EIO5; |
1553 | } else if (number < 0) { |
1554 | if (ISSET(st->flags, ST_AT_FILEMARK)((st->flags) & (0x00000010))) { |
1555 | /* |
1556 | * Handling of ST_AT_FILEMARK |
1557 | * in st_space will fill in the |
1558 | * right file mark count. |
1559 | */ |
1560 | error = st_space(st, 0, SP_FILEMARKS0x01, |
1561 | flags); |
1562 | if (error != 0) |
1563 | return error; |
1564 | } |
1565 | if (ISSET(st->flags, ST_BLANK_READ)((st->flags) & (0x00000200))) { |
1566 | CLR(st->flags, ST_BLANK_READ)((st->flags) &= ~(0x00000200)); |
1567 | return EIO5; |
1568 | } |
1569 | CLR(st->flags, ST_EIO_PENDING | ST_EOM_PENDING)((st->flags) &= ~(0x00000020 | 0x00000040)); |
1570 | } |
1571 | } |
1572 | break; |
1573 | case SP_FILEMARKS0x01: |
1574 | if (ISSET(st->flags, ST_EIO_PENDING)((st->flags) & (0x00000020))) { |
1575 | if (number > 0) { |
1576 | /* pretend we just discovered the error */ |
1577 | CLR(st->flags, ST_EIO_PENDING)((st->flags) &= ~(0x00000020)); |
1578 | return EIO5; |
1579 | } else if (number < 0) { |
1580 | /* back away from the error */ |
1581 | CLR(st->flags, ST_EIO_PENDING)((st->flags) &= ~(0x00000020)); |
1582 | } |
1583 | } |
1584 | if (ISSET(st->flags, ST_AT_FILEMARK)((st->flags) & (0x00000010))) { |
1585 | CLR(st->flags, ST_AT_FILEMARK)((st->flags) &= ~(0x00000010)); |
1586 | number--; |
1587 | } |
1588 | if (ISSET(st->flags, ST_BLANK_READ)((st->flags) & (0x00000200)) && (number < 0)) { |
1589 | /* back away from unwritten tape */ |
1590 | CLR(st->flags, ST_BLANK_READ)((st->flags) &= ~(0x00000200)); |
1591 | number++; /* XXX dubious */ |
1592 | } |
1593 | break; |
1594 | case SP_EOM0x03: |
1595 | if (ISSET(st->flags, ST_EOM_PENDING)((st->flags) & (0x00000040))) { |
1596 | /* We are already there. */ |
1597 | CLR(st->flags, ST_EOM_PENDING)((st->flags) &= ~(0x00000040)); |
1598 | return 0; |
1599 | } |
1600 | if (ISSET(st->flags, ST_EIO_PENDING)((st->flags) & (0x00000020))) { |
1601 | /* pretend we just discovered the error */ |
1602 | CLR(st->flags, ST_EIO_PENDING)((st->flags) &= ~(0x00000020)); |
1603 | return EIO5; |
1604 | } |
1605 | if (ISSET(st->flags, ST_AT_FILEMARK)((st->flags) & (0x00000010))) |
1606 | CLR(st->flags, ST_AT_FILEMARK)((st->flags) &= ~(0x00000010)); |
1607 | break; |
1608 | } |
1609 | if (number == 0) |
1610 | return 0; |
1611 | |
1612 | xs = scsi_xs_get(st->sc_link, flags); |
1613 | if (xs == NULL((void *)0)) |
1614 | return ENOMEM12; |
1615 | |
1616 | cmd = (struct scsi_space *)&xs->cmd; |
1617 | cmd->opcode = SPACE0x11; |
1618 | cmd->byte2 = what; |
1619 | _lto3b(number, cmd->number); |
1620 | xs->cmdlen = sizeof(*cmd); |
1621 | xs->timeout = ST_SPC_TIME(4 * 60 * 60 * 1000); |
1622 | |
1623 | CLR(st->flags, ST_EOD_DETECTED)((st->flags) &= ~(0x00000080)); |
1624 | |
1625 | error = scsi_xs_sync(xs); |
1626 | scsi_xs_put(xs); |
1627 | |
1628 | if (error != 0) { |
1629 | st->media_fileno = -1; |
1630 | st->media_blkno = -1; |
1631 | } else { |
1632 | switch (what) { |
1633 | case SP_BLKS0x00: |
1634 | if (st->media_blkno != -1) { |
1635 | st->media_blkno += number; |
1636 | if (st->media_blkno < 0) |
1637 | st->media_blkno = -1; |
1638 | } |
1639 | break; |
1640 | case SP_FILEMARKS0x01: |
1641 | if (st->media_fileno != -1) { |
1642 | if (!ISSET(st->flags, ST_EOD_DETECTED)((st->flags) & (0x00000080))) |
1643 | st->media_fileno += number; |
1644 | if (st->media_fileno > st->media_eom) |
1645 | st->media_eom = st->media_fileno; |
1646 | st->media_blkno = 0; |
1647 | } |
1648 | break; |
1649 | case SP_EOM0x03: |
1650 | if (st->media_eom != -1) { |
1651 | st->media_fileno = st->media_eom; |
1652 | st->media_blkno = 0; |
1653 | } else { |
1654 | st->media_fileno = -1; |
1655 | st->media_blkno = -1; |
1656 | } |
1657 | break; |
1658 | default: |
1659 | st->media_fileno = -1; |
1660 | st->media_blkno = -1; |
1661 | break; |
1662 | } |
1663 | } |
1664 | |
1665 | return error; |
1666 | } |
1667 | |
1668 | /* |
1669 | * write N filemarks |
1670 | */ |
1671 | int |
1672 | st_write_filemarks(struct st_softc *st, int number, int flags) |
1673 | { |
1674 | struct scsi_write_filemarks *cmd; |
1675 | struct scsi_xfer *xs; |
1676 | int error; |
1677 | |
1678 | if (number < 0) |
1679 | return EINVAL22; |
1680 | |
1681 | xs = scsi_xs_get(st->sc_link, flags); |
1682 | if (xs == NULL((void *)0)) |
1683 | return ENOMEM12; |
1684 | |
1685 | xs->cmdlen = sizeof(*cmd); |
1686 | xs->timeout = ST_IO_TIME(3 * 60 * 1000) * 4; |
1687 | |
1688 | switch (number) { |
1689 | case 0: /* really a command to sync the drive's buffers */ |
1690 | break; |
1691 | case 1: |
1692 | if (ISSET(st->flags, ST_FM_WRITTEN)((st->flags) & (0x00000100))) /* already have one down */ |
1693 | CLR(st->flags, ST_WRITTEN)((st->flags) &= ~(0x00000004)); |
1694 | else |
1695 | SET(st->flags, ST_FM_WRITTEN)((st->flags) |= (0x00000100)); |
1696 | CLR(st->flags, ST_PER_ACTION)((st->flags) &= ~((0x00000010 | 0x00000020 | 0x00000040 | 0x00000200))); |
1697 | break; |
1698 | default: |
1699 | CLR(st->flags, ST_PER_ACTION | ST_WRITTEN)((st->flags) &= ~((0x00000010 | 0x00000020 | 0x00000040 | 0x00000200) | 0x00000004)); |
1700 | break; |
1701 | } |
1702 | |
1703 | cmd = (struct scsi_write_filemarks *)&xs->cmd; |
1704 | cmd->opcode = WRITE_FILEMARKS0x10; |
1705 | _lto3b(number, cmd->number); |
1706 | |
1707 | error = scsi_xs_sync(xs); |
1708 | scsi_xs_put(xs); |
1709 | |
1710 | if (error != 0) { |
1711 | st->media_fileno = -1; |
1712 | st->media_blkno = -1; |
1713 | st->media_eom = -1; |
1714 | } else if (st->media_fileno != -1) { |
1715 | st->media_fileno += number; |
1716 | st->media_eom = st->media_fileno; |
1717 | st->media_blkno = 0; |
1718 | } |
1719 | |
1720 | return error; |
1721 | } |
1722 | |
1723 | /* |
1724 | * Make sure the right number of file marks is on tape if the |
1725 | * tape has been written. If the position argument is true, |
1726 | * leave the tape positioned where it was originally. |
1727 | * |
1728 | * nmarks returns the number of marks to skip (or, if position |
1729 | * true, which were skipped) to get back original position. |
1730 | */ |
1731 | int |
1732 | st_check_eod(struct st_softc *st, int position, int *nmarks, int flags) |
1733 | { |
1734 | int error; |
1735 | |
1736 | switch (st->flags & (ST_WRITTEN0x00000004 | ST_FM_WRITTEN0x00000100 | ST_2FM_AT_EOD0x00000400)) { |
1737 | default: |
1738 | *nmarks = 0; |
1739 | return 0; |
1740 | case ST_WRITTEN0x00000004: |
1741 | case ST_WRITTEN0x00000004 | ST_FM_WRITTEN0x00000100 | ST_2FM_AT_EOD0x00000400: |
1742 | *nmarks = 1; |
1743 | break; |
1744 | case ST_WRITTEN0x00000004 | ST_2FM_AT_EOD0x00000400: |
1745 | *nmarks = 2; |
1746 | } |
1747 | error = st_write_filemarks(st, *nmarks, flags); |
1748 | if (error == 0 && position != 0) |
1749 | error = st_space(st, -*nmarks, SP_FILEMARKS0x01, flags); |
1750 | return error; |
1751 | } |
1752 | |
1753 | /* |
1754 | * load/unload/retension |
1755 | */ |
1756 | int |
1757 | st_load(struct st_softc *st, u_int type, int flags) |
1758 | { |
1759 | struct scsi_load *cmd; |
1760 | struct scsi_xfer *xs; |
1761 | int error, nmarks; |
1762 | |
1763 | st->media_fileno = -1; |
1764 | st->media_blkno = -1; |
1765 | st->media_eom = -1; |
1766 | |
1767 | if (type != LD_LOAD0x01) { |
1768 | error = st_check_eod(st, 0, &nmarks, flags); |
1769 | if (error != 0) |
1770 | return error; |
1771 | } |
1772 | |
1773 | if (ISSET(st->quirks, ST_Q_IGNORE_LOADS)((st->quirks) & (0x0002))) { |
1774 | if (type == LD_LOAD0x01) { |
1775 | /* |
1776 | * If we ignore loads, at least we should try a rewind. |
1777 | */ |
1778 | return st_rewind(st, 0, flags); |
1779 | } |
1780 | return 0; |
1781 | } |
1782 | |
1783 | |
1784 | xs = scsi_xs_get(st->sc_link, flags); |
1785 | if (xs == NULL((void *)0)) |
1786 | return ENOMEM12; |
1787 | xs->cmdlen = sizeof(*cmd); |
1788 | xs->timeout = ST_SPC_TIME(4 * 60 * 60 * 1000); |
1789 | |
1790 | cmd = (struct scsi_load *)&xs->cmd; |
1791 | cmd->opcode = LOAD0x1b; |
1792 | cmd->how = type; |
1793 | |
1794 | error = scsi_xs_sync(xs); |
1795 | scsi_xs_put(xs); |
1796 | |
1797 | return error; |
1798 | } |
1799 | |
1800 | /* |
1801 | * Rewind the device |
1802 | */ |
1803 | int |
1804 | st_rewind(struct st_softc *st, u_int immediate, int flags) |
1805 | { |
1806 | struct scsi_rewind *cmd; |
1807 | struct scsi_xfer *xs; |
1808 | int error, nmarks; |
1809 | |
1810 | error = st_check_eod(st, 0, &nmarks, flags); |
1811 | if (error != 0) |
1812 | return error; |
1813 | CLR(st->flags, ST_PER_ACTION)((st->flags) &= ~((0x00000010 | 0x00000020 | 0x00000040 | 0x00000200))); |
1814 | |
1815 | xs = scsi_xs_get(st->sc_link, flags); |
1816 | if (xs == NULL((void *)0)) |
1817 | return ENOMEM12; |
1818 | xs->cmdlen = sizeof(*cmd); |
1819 | xs->timeout = immediate ? ST_CTL_TIME(30 * 1000) : ST_SPC_TIME(4 * 60 * 60 * 1000); |
1820 | |
1821 | cmd = (struct scsi_rewind *)&xs->cmd; |
1822 | cmd->opcode = REWIND0x01; |
1823 | cmd->byte2 = immediate; |
1824 | |
1825 | error = scsi_xs_sync(xs); |
1826 | scsi_xs_put(xs); |
1827 | |
1828 | if (error == 0) { |
1829 | st->media_fileno = 0; |
1830 | st->media_blkno = 0; |
1831 | } |
1832 | |
1833 | return error; |
1834 | } |
1835 | |
1836 | /* |
1837 | * Look at the returned sense and act on the error to determine |
1838 | * the unix error number to pass back... (0 = report no error) |
1839 | * (-1 = continue processing) |
1840 | */ |
1841 | int |
1842 | st_interpret_sense(struct scsi_xfer *xs) |
1843 | { |
1844 | struct scsi_sense_data *sense = &xs->sense; |
1845 | struct scsi_link *link = xs->sc_link; |
1846 | struct scsi_space *space; |
1847 | struct st_softc *st = link->device_softc; |
1848 | u_int8_t serr = sense->error_code & SSD_ERRCODE0x7F; |
1849 | u_int8_t skey = sense->flags & SSD_KEY0x0F; |
1850 | int32_t resid, info, number; |
1851 | int datalen; |
1852 | |
1853 | if (!ISSET(link->flags, SDEV_OPEN)((link->flags) & (0x0008)) || |
1854 | (serr != SSD_ERRCODE_CURRENT0x70 && serr != SSD_ERRCODE_DEFERRED0x71)) |
1855 | return scsi_interpret_sense(xs); |
1856 | |
1857 | info = (int32_t)_4btol(sense->info); |
1858 | |
1859 | switch (skey) { |
1860 | |
1861 | /* |
1862 | * We do custom processing in st for the unit becoming ready case. |
1863 | * in this case we do not allow xs->retries to be decremented |
1864 | * only on the "Unit Becoming Ready" case. This is because tape |
1865 | * drives report "Unit Becoming Ready" when loading media, etc. |
1866 | * and can take a long time. Rather than having a massive timeout |
1867 | * for all operations (which would cause other problems) we allow |
1868 | * operations to wait (but be interruptible with Ctrl-C) forever |
1869 | * as long as the drive is reporting that it is becoming ready. |
1870 | * all other cases are handled as per the default. |
1871 | */ |
1872 | |
1873 | case SKEY_NOT_READY0x02: |
1874 | if (ISSET(xs->flags, SCSI_IGNORE_NOT_READY)((xs->flags) & (0x00040))) |
1875 | return 0; |
1876 | switch (ASC_ASCQ(sense)((sense->add_sense_code << 8) | sense->add_sense_code_qual )) { |
1877 | case SENSE_NOT_READY_BECOMING_READY0x0401: |
1878 | SC_DEBUG(link, SDEV_DB1, ("not ready: busy (%#x)\n", |
1879 | sense->add_sense_code_qual)); |
1880 | /* don't count this as a retry */ |
1881 | xs->retries++; |
1882 | return scsi_delay(xs, 1); |
1883 | default: |
1884 | return scsi_interpret_sense(xs); |
1885 | } |
1886 | break; |
1887 | case SKEY_BLANK_CHECK0x08: |
1888 | if (sense->error_code & SSD_ERRCODE_VALID0x80 && |
1889 | xs->cmd.opcode == SPACE0x11) { |
1890 | switch (ASC_ASCQ(sense)((sense->add_sense_code << 8) | sense->add_sense_code_qual )) { |
1891 | case SENSE_END_OF_DATA_DETECTED0x0005: |
1892 | SET(st->flags, ST_EOD_DETECTED)((st->flags) |= (0x00000080)); |
1893 | space = (struct scsi_space *)&xs->cmd; |
1894 | number = _3btol(space->number); |
1895 | st->media_fileno = number - info; |
1896 | st->media_eom = st->media_fileno; |
1897 | return 0; |
1898 | case SENSE_BEGINNING_OF_MEDIUM_DETECTED0x0004: |
1899 | /* Standard says: Position is undefined! */ |
1900 | SET(st->flags, ST_BOD_DETECTED)((st->flags) |= (0x00008000)); |
1901 | st->media_fileno = -1; |
1902 | st->media_blkno = -1; |
1903 | return 0; |
1904 | } |
1905 | } |
1906 | break; |
1907 | case SKEY_NO_SENSE0x00: |
1908 | case SKEY_RECOVERED_ERROR0x01: |
1909 | case SKEY_MEDIUM_ERROR0x03: |
1910 | case SKEY_VOLUME_OVERFLOW0x0D: |
1911 | break; |
1912 | default: |
1913 | return scsi_interpret_sense(xs); |
1914 | } |
1915 | |
1916 | /* |
1917 | * 'resid' can be in units of st->blksize or bytes. xs->resid and |
1918 | * xs->datalen are always in units of bytes. So we need a variable |
1919 | * to store datalen in the same units as resid and to adjust |
1920 | * xs->resid to be in bytes. |
1921 | */ |
1922 | if (ISSET(sense->error_code, SSD_ERRCODE_VALID)((sense->error_code) & (0x80))) { |
1923 | if (ISSET(st->flags, ST_FIXEDBLOCKS)((st->flags) & (0x00000008))) |
1924 | resid = info * st->blksize; /* XXXX overflow? */ |
1925 | else |
1926 | resid = info; |
1927 | } else { |
1928 | resid = xs->datalen; |
1929 | } |
1930 | |
1931 | if (resid < 0 || resid > xs->datalen) |
1932 | xs->resid = xs->datalen; |
1933 | else |
1934 | xs->resid = resid; |
1935 | |
1936 | datalen = xs->datalen; |
1937 | if (ISSET(st->flags, ST_FIXEDBLOCKS)((st->flags) & (0x00000008))) { |
1938 | resid /= st->blksize; |
1939 | datalen /= st->blksize; |
1940 | } |
1941 | |
1942 | if (ISSET(sense->flags, SSD_FILEMARK)((sense->flags) & (0x80))) { |
1943 | if (st->media_fileno != -1) { |
1944 | st->media_fileno++; |
1945 | if (st->media_fileno > st->media_eom) |
1946 | st->media_eom = st->media_fileno; |
1947 | st->media_blkno = 0; |
1948 | } |
1949 | if (!ISSET(st->flags, ST_FIXEDBLOCKS)((st->flags) & (0x00000008))) |
1950 | return 0; |
1951 | SET(st->flags, ST_AT_FILEMARK)((st->flags) |= (0x00000010)); |
1952 | } |
1953 | |
1954 | if (ISSET(sense->flags, SSD_EOM)((sense->flags) & (0x40))) { |
1955 | SET(st->flags, ST_EOM_PENDING)((st->flags) |= (0x00000040)); |
1956 | xs->resid = 0; |
1957 | if (ISSET(st->flags, ST_FIXEDBLOCKS)((st->flags) & (0x00000008))) |
1958 | return 0; |
1959 | } |
1960 | |
1961 | if (ISSET(sense->flags, SSD_ILI)((sense->flags) & (0x20))) { |
1962 | if (!ISSET(st->flags, ST_FIXEDBLOCKS)((st->flags) & (0x00000008))) { |
1963 | if (resid >= 0 && resid <= datalen) |
1964 | return 0; |
1965 | if (!ISSET(xs->flags, SCSI_SILENT)((xs->flags) & (0x00020))) |
1966 | printf( "%s: bad residual %d out of " |
1967 | "%d\n", st->sc_dev.dv_xname, resid, |
1968 | datalen); |
1969 | return EIO5; |
1970 | } |
1971 | |
1972 | /* Fixed size blocks. */ |
1973 | if (ISSET(sense->error_code, SSD_ERRCODE_VALID)((sense->error_code) & (0x80))) |
1974 | if (!ISSET(xs->flags, SCSI_SILENT)((xs->flags) & (0x00020))) |
1975 | printf("%s: block wrong size, %d blocks " |
1976 | "residual\n", st->sc_dev.dv_xname, resid); |
1977 | SET(st->flags, ST_EIO_PENDING)((st->flags) |= (0x00000020)); |
1978 | /* |
1979 | * This quirk code helps the drive read the first tape block, |
1980 | * regardless of format. That is required for these drives to |
1981 | * return proper MODE SENSE information. |
1982 | */ |
1983 | if (ISSET(st->quirks, ST_Q_SENSE_HELP)((st->quirks) & (0x0001)) && |
1984 | !ISSET(link->flags, SDEV_MEDIA_LOADED)((link->flags) & (0x0002))) |
1985 | st->blksize -= 512; |
1986 | } |
1987 | |
1988 | if (ISSET(st->flags, ST_FIXEDBLOCKS)((st->flags) & (0x00000008)) && xs->resid == xs->datalen) { |
1989 | if (ISSET(st->flags, ST_EIO_PENDING)((st->flags) & (0x00000020))) |
1990 | return EIO5; |
1991 | if (ISSET(st->flags, ST_AT_FILEMARK)((st->flags) & (0x00000010))) |
1992 | return 0; |
1993 | } |
1994 | |
1995 | if (skey == SKEY_BLANK_CHECK0x08) { |
1996 | /* |
1997 | * This quirk code helps the drive read the first tape block, |
1998 | * regardless of format. That is required for these drives to |
1999 | * return proper MODE SENSE information. |
2000 | */ |
2001 | if (ISSET(st->quirks, ST_Q_SENSE_HELP)((st->quirks) & (0x0001)) && |
2002 | !ISSET(link->flags, SDEV_MEDIA_LOADED)((link->flags) & (0x0002))) { |
2003 | /* still starting */ |
2004 | st->blksize -= 512; |
2005 | } else if (!ISSET(st->flags, ST_2FM_AT_EOD | ST_BLANK_READ)((st->flags) & (0x00000400 | 0x00000200))) { |
2006 | SET(st->flags, ST_BLANK_READ)((st->flags) |= (0x00000200)); |
2007 | SET(st->flags, ST_EOM_PENDING)((st->flags) |= (0x00000040)); |
2008 | xs->resid = xs->datalen; |
2009 | return 0; |
2010 | } |
2011 | } |
2012 | |
2013 | return scsi_interpret_sense(xs); |
2014 | } |
2015 | |
2016 | /* |
2017 | * The quirk here is that the drive returns some value to st_mode_sense |
2018 | * incorrectly until the tape has actually passed by the head. |
2019 | * |
2020 | * The method is to set the drive to large fixed-block state (user-specified |
2021 | * density and 1024-byte blocks), then read and rewind to get it to sense the |
2022 | * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't |
2023 | * work, as a last resort, try variable- length blocks. The result will be |
2024 | * the ability to do an accurate st_mode_sense. |
2025 | * |
2026 | * We know we can do a rewind because we just did a load, which implies rewind. |
2027 | * Rewind seems preferable to space backward if we have a virgin tape. |
2028 | * |
2029 | * The rest of the code for this quirk is in ILI processing and BLANK CHECK |
2030 | * error processing, both part of st_interpret_sense. |
2031 | */ |
2032 | int |
2033 | st_touch_tape(struct st_softc *st) |
2034 | { |
2035 | char *buf = NULL((void *)0); |
2036 | int readsize, maxblksize = 1024; |
2037 | int error = 0; |
2038 | |
2039 | if ((error = st_mode_sense(st, 0)) != 0) |
2040 | goto done; |
2041 | buf = dma_alloc(maxblksize, PR_NOWAIT0x0002); |
2042 | if (buf == NULL((void *)0)) { |
2043 | error = ENOMEM12; |
2044 | goto done; |
2045 | } |
2046 | |
2047 | st->blksize = 1024; |
2048 | do { |
2049 | switch (st->blksize) { |
2050 | case 512: |
2051 | case 1024: |
2052 | readsize = st->blksize; |
2053 | SET(st->flags, ST_FIXEDBLOCKS)((st->flags) |= (0x00000008)); |
2054 | break; |
2055 | default: |
2056 | readsize = 1; |
2057 | CLR(st->flags, ST_FIXEDBLOCKS)((st->flags) &= ~(0x00000008)); |
2058 | } |
2059 | if ((error = st_mode_select(st, 0)) != 0) |
2060 | goto done; |
2061 | st_read(st, buf, readsize, SCSI_SILENT0x00020); /* XXX */ |
2062 | if ((error = st_rewind(st, 0, 0)) != 0) |
2063 | goto done; |
2064 | } while (readsize != 1 && readsize > st->blksize); |
2065 | done: |
2066 | dma_free(buf, maxblksize); |
2067 | return error; |
2068 | } |