1*b3af768dSjsg /* $OpenBSD: ch.c,v 1.72 2023/04/11 00:45:09 jsg Exp $ */
2cb3ad6e3Sdownsj /* $NetBSD: ch.c,v 1.26 1997/02/21 22:06:52 thorpej Exp $ */
3df930be7Sderaadt
4df930be7Sderaadt /*
5cb3ad6e3Sdownsj * Copyright (c) 1996, 1997 Jason R. Thorpe <thorpej@and.com>
6d724e01aSderaadt * All rights reserved.
7d724e01aSderaadt *
8d724e01aSderaadt * Partially based on an autochanger driver written by Stefan Grefen
9d724e01aSderaadt * and on an autochanger driver written by the Systems Programming Group
10d724e01aSderaadt * at the University of Utah Computer Science Department.
11df930be7Sderaadt *
12df930be7Sderaadt * Redistribution and use in source and binary forms, with or without
13df930be7Sderaadt * modification, are permitted provided that the following conditions
14df930be7Sderaadt * are met:
15df930be7Sderaadt * 1. Redistributions of source code must retain the above copyright
16df930be7Sderaadt * notice, this list of conditions and the following disclaimer.
17df930be7Sderaadt * 2. Redistributions in binary form must reproduce the above copyright
18df930be7Sderaadt * notice, this list of conditions and the following disclaimer in the
19df930be7Sderaadt * documentation and/or other materials provided with the distribution.
20df930be7Sderaadt * 3. All advertising materials mentioning features or use of this software
21d724e01aSderaadt * must display the following acknowledgements:
22d724e01aSderaadt * This product includes software developed by Jason R. Thorpe
23d724e01aSderaadt * for And Communications, http://www.and.com/
24df930be7Sderaadt * 4. The name of the author may not be used to endorse or promote products
25df930be7Sderaadt * derived from this software without specific prior written permission.
26df930be7Sderaadt *
27df930be7Sderaadt * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
28df930be7Sderaadt * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
29df930be7Sderaadt * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
30df930be7Sderaadt * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
31d724e01aSderaadt * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
32d724e01aSderaadt * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
33d724e01aSderaadt * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
34d724e01aSderaadt * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
35d724e01aSderaadt * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36d724e01aSderaadt * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37d724e01aSderaadt * SUCH DAMAGE.
38df930be7Sderaadt */
39df930be7Sderaadt
40df930be7Sderaadt #include <sys/param.h>
41df930be7Sderaadt #include <sys/systm.h>
42df930be7Sderaadt #include <sys/errno.h>
43df930be7Sderaadt #include <sys/ioctl.h>
44df930be7Sderaadt #include <sys/chio.h>
45df930be7Sderaadt #include <sys/device.h>
46d724e01aSderaadt #include <sys/malloc.h>
475c0b007dSderaadt #include <sys/pool.h>
4805c14d82Sderaadt #include <sys/conf.h>
49cb3ad6e3Sdownsj #include <sys/fcntl.h>
50df930be7Sderaadt
51df930be7Sderaadt #include <scsi/scsi_all.h>
52df930be7Sderaadt #include <scsi/scsi_changer.h>
53bba39a67Skrw #include <scsi/scsi_debug.h>
54df930be7Sderaadt #include <scsi/scsiconf.h>
55df930be7Sderaadt
56df930be7Sderaadt #define CHRETRIES 2
57d724e01aSderaadt #define CHUNIT(x) (minor((x)))
58df930be7Sderaadt
59df930be7Sderaadt struct ch_softc {
60d724e01aSderaadt struct device sc_dev; /* generic device info */
61d724e01aSderaadt struct scsi_link *sc_link; /* link in the SCSI bus */
62df930be7Sderaadt
63d724e01aSderaadt int sc_picker; /* current picker */
64df930be7Sderaadt
65df930be7Sderaadt /*
66d724e01aSderaadt * The following information is obtained from the
67d724e01aSderaadt * element address assignment page.
68df930be7Sderaadt */
69d724e01aSderaadt int sc_firsts[4]; /* firsts, indexed by CHET_* */
70d724e01aSderaadt int sc_counts[4]; /* counts, indexed by CHET_* */
71d724e01aSderaadt
72d724e01aSderaadt /*
73d724e01aSderaadt * The following mask defines the legal combinations
74d724e01aSderaadt * of elements for the MOVE MEDIUM command.
75d724e01aSderaadt */
76d724e01aSderaadt u_int8_t sc_movemask[4];
77d724e01aSderaadt
78d724e01aSderaadt /*
79d724e01aSderaadt * As above, but for EXCHANGE MEDIUM.
80d724e01aSderaadt */
81d724e01aSderaadt u_int8_t sc_exchangemask[4];
82d724e01aSderaadt
83d724e01aSderaadt int flags; /* misc. info */
84cb3ad6e3Sdownsj
85cb3ad6e3Sdownsj /*
86cb3ad6e3Sdownsj * Quirks; see below.
87cb3ad6e3Sdownsj */
88cb3ad6e3Sdownsj int sc_settledelay; /* delay for settle */
89cb3ad6e3Sdownsj
90d724e01aSderaadt };
91d724e01aSderaadt
92d724e01aSderaadt /* sc_flags */
93d724e01aSderaadt #define CHF_ROTATE 0x01 /* picker can rotate */
94d724e01aSderaadt
95d724e01aSderaadt /* Autoconfiguration glue */
96c4071fd1Smillert int chmatch(struct device *, void *, void *);
97c4071fd1Smillert void chattach(struct device *, struct device *, void *);
98d724e01aSderaadt
999eaf72d1Smpi const struct cfattach ch_ca = {
100d724e01aSderaadt sizeof(struct ch_softc), chmatch, chattach
101d724e01aSderaadt };
102d724e01aSderaadt
103d724e01aSderaadt struct cfdriver ch_cd = {
104d724e01aSderaadt NULL, "ch", DV_DULL
105df930be7Sderaadt };
106df930be7Sderaadt
107697fee68Smickey const struct scsi_inquiry_pattern ch_patterns[] = {
108df930be7Sderaadt {T_CHANGER, T_REMOV,
109df930be7Sderaadt "", "", ""},
110df930be7Sderaadt };
111df930be7Sderaadt
112c4071fd1Smillert int ch_move(struct ch_softc *, struct changer_move *);
113c4071fd1Smillert int ch_exchange(struct ch_softc *, struct changer_exchange *);
114c4071fd1Smillert int ch_position(struct ch_softc *, struct changer_position *);
1157459bcebSbeck int ch_usergetelemstatus(struct ch_softc *,
1167459bcebSbeck struct changer_element_status_request *);
1177459bcebSbeck int ch_getelemstatus(struct ch_softc *, int, int, caddr_t, size_t, int);
118c4071fd1Smillert int ch_get_params(struct ch_softc *, int);
119823e35f2Sbeck int ch_interpret_sense(struct scsi_xfer *xs);
120c4071fd1Smillert void ch_get_quirks(struct ch_softc *, struct scsi_inquiry_data *);
121cb3ad6e3Sdownsj
122cb3ad6e3Sdownsj /*
123cb3ad6e3Sdownsj * SCSI changer quirks.
124cb3ad6e3Sdownsj */
125cb3ad6e3Sdownsj struct chquirk {
126cb3ad6e3Sdownsj struct scsi_inquiry_pattern cq_match; /* device id pattern */
127cb3ad6e3Sdownsj int cq_settledelay; /* settle delay, in seconds */
128cb3ad6e3Sdownsj };
129cb3ad6e3Sdownsj
130cb3ad6e3Sdownsj struct chquirk chquirks[] = {
131cb3ad6e3Sdownsj {{T_CHANGER, T_REMOV,
132cb3ad6e3Sdownsj "SPECTRA", "9000", "0200"},
133cb3ad6e3Sdownsj 75},
134cb3ad6e3Sdownsj };
135d724e01aSderaadt
136df930be7Sderaadt int
chmatch(struct device * parent,void * match,void * aux)1370dbfc23eSmatthew chmatch(struct device *parent, void *match, void *aux)
138df930be7Sderaadt {
139a0837789Sdlg struct scsi_attach_args *sa = aux;
1400fbd355cSkrw struct scsi_inquiry_data *inq = &sa->sa_sc_link->inqdata;
141df930be7Sderaadt int priority;
142df930be7Sderaadt
1430fbd355cSkrw (void)scsi_inqmatch(inq, ch_patterns, nitems(ch_patterns),
144df930be7Sderaadt sizeof(ch_patterns[0]), &priority);
145d724e01aSderaadt
1460af55edbSkrw return priority;
147df930be7Sderaadt }
148df930be7Sderaadt
149df930be7Sderaadt void
chattach(struct device * parent,struct device * self,void * aux)1500dbfc23eSmatthew chattach(struct device *parent, struct device *self, void *aux)
151df930be7Sderaadt {
152d724e01aSderaadt struct ch_softc *sc = (struct ch_softc *)self;
153a0837789Sdlg struct scsi_attach_args *sa = aux;
154d724e01aSderaadt struct scsi_link *link = sa->sa_sc_link;
155df930be7Sderaadt
156d724e01aSderaadt /* Glue into the SCSI bus */
157d724e01aSderaadt sc->sc_link = link;
15877877975Skrw link->interpret_sense = ch_interpret_sense;
159d724e01aSderaadt link->device_softc = sc;
160d724e01aSderaadt link->openings = 1;
161df930be7Sderaadt
1620c0430f8Sniklas printf("\n");
163d724e01aSderaadt
164d724e01aSderaadt /*
165*b3af768dSjsg * Store our device's quirks.
166cb3ad6e3Sdownsj */
1670fbd355cSkrw ch_get_quirks(sc, &link->inqdata);
168d724e01aSderaadt }
169d724e01aSderaadt
170df930be7Sderaadt int
chopen(dev_t dev,int flags,int fmt,struct proc * p)1710dbfc23eSmatthew chopen(dev_t dev, int flags, int fmt, struct proc *p)
172df930be7Sderaadt {
173d724e01aSderaadt struct ch_softc *sc;
174b4eac157Smjacob int oldcounts[4];
175b4eac157Smjacob int i, unit, error = 0;
176df930be7Sderaadt
177df930be7Sderaadt unit = CHUNIT(dev);
178d724e01aSderaadt if ((unit >= ch_cd.cd_ndevs) ||
179d724e01aSderaadt ((sc = ch_cd.cd_devs[unit]) == NULL))
1800af55edbSkrw return ENXIO;
181df930be7Sderaadt
182df930be7Sderaadt /*
183d724e01aSderaadt * Only allow one open at a time.
184df930be7Sderaadt */
185c3094a8aSkrw if (ISSET(sc->sc_link->flags, SDEV_OPEN))
1860af55edbSkrw return EBUSY;
187d724e01aSderaadt
188dacf4336Skrw SET(sc->sc_link->flags, SDEV_OPEN);
189df930be7Sderaadt
190df930be7Sderaadt /*
191823e35f2Sbeck * Absorb any unit attention errors. We must notice
192823e35f2Sbeck * "Not ready" errors as a changer will report "In the
193823e35f2Sbeck * process of getting ready" any time it must rescan
194823e35f2Sbeck * itself to determine the state of the changer.
195df930be7Sderaadt */
196d3d7cafbSbeck error = scsi_test_unit_ready(sc->sc_link, TEST_READY_RETRIES,
197823e35f2Sbeck SCSI_IGNORE_ILLEGAL_REQUEST | SCSI_IGNORE_MEDIA_CHANGE);
19805c14d82Sderaadt if (error)
199df930be7Sderaadt goto bad;
200df930be7Sderaadt
201df930be7Sderaadt /*
202b4eac157Smjacob * Get information about the device. Save old information
203b4eac157Smjacob * so we can decide whether to be verbose about new parameters.
204df930be7Sderaadt */
205b4eac157Smjacob for (i = 0; i < 4; i++) {
206b4eac157Smjacob oldcounts[i] = sc->sc_counts[i];
207b4eac157Smjacob }
208b4eac157Smjacob error = ch_get_params(sc, scsi_autoconf);
2096d4a5e5aSbeck if (error)
210df930be7Sderaadt goto bad;
211b4eac157Smjacob
212b4eac157Smjacob for (i = 0; i < 4; i++) {
213b4eac157Smjacob if (oldcounts[i] != sc->sc_counts[i]) {
214b4eac157Smjacob break;
215b4eac157Smjacob }
216b4eac157Smjacob }
217b4eac157Smjacob if (i < 4) {
2186d4a5e5aSbeck #ifdef CHANGER_DEBUG
219b4eac157Smjacob #define PLURAL(c) (c) == 1 ? "" : "s"
220b4eac157Smjacob printf("%s: %d slot%s, %d drive%s, %d picker%s, %d portal%s\n",
221b4eac157Smjacob sc->sc_dev.dv_xname,
222b4eac157Smjacob sc->sc_counts[CHET_ST], PLURAL(sc->sc_counts[CHET_ST]),
223b4eac157Smjacob sc->sc_counts[CHET_DT], PLURAL(sc->sc_counts[CHET_DT]),
224b4eac157Smjacob sc->sc_counts[CHET_MT], PLURAL(sc->sc_counts[CHET_MT]),
225b4eac157Smjacob sc->sc_counts[CHET_IE], PLURAL(sc->sc_counts[CHET_IE]));
226b4eac157Smjacob #undef PLURAL
227b4eac157Smjacob printf("%s: move mask: 0x%x 0x%x 0x%x 0x%x\n",
228b4eac157Smjacob sc->sc_dev.dv_xname,
229b4eac157Smjacob sc->sc_movemask[CHET_MT], sc->sc_movemask[CHET_ST],
230b4eac157Smjacob sc->sc_movemask[CHET_IE], sc->sc_movemask[CHET_DT]);
231b4eac157Smjacob printf("%s: exchange mask: 0x%x 0x%x 0x%x 0x%x\n",
232b4eac157Smjacob sc->sc_dev.dv_xname,
233b4eac157Smjacob sc->sc_exchangemask[CHET_MT], sc->sc_exchangemask[CHET_ST],
234b4eac157Smjacob sc->sc_exchangemask[CHET_IE], sc->sc_exchangemask[CHET_DT]);
235b4eac157Smjacob #endif /* CHANGER_DEBUG */
236b4eac157Smjacob }
237b4eac157Smjacob
238b4eac157Smjacob /* Default the current picker. */
239b4eac157Smjacob sc->sc_picker = sc->sc_firsts[CHET_MT];
240df930be7Sderaadt
2410af55edbSkrw return 0;
242df930be7Sderaadt
243df930be7Sderaadt bad:
24464e2b1d6Skrw CLR(sc->sc_link->flags, SDEV_OPEN);
2450af55edbSkrw return error;
246df930be7Sderaadt }
247df930be7Sderaadt
248df930be7Sderaadt int
chclose(dev_t dev,int flags,int fmt,struct proc * p)2490dbfc23eSmatthew chclose(dev_t dev, int flags, int fmt, struct proc *p)
250df930be7Sderaadt {
251d724e01aSderaadt struct ch_softc *sc = ch_cd.cd_devs[CHUNIT(dev)];
252df930be7Sderaadt
25364e2b1d6Skrw CLR(sc->sc_link->flags, SDEV_OPEN);
2540af55edbSkrw return 0;
255df930be7Sderaadt }
256df930be7Sderaadt
257df930be7Sderaadt int
chioctl(dev_t dev,u_long cmd,caddr_t data,int flags,struct proc * p)2580dbfc23eSmatthew chioctl(dev_t dev, u_long cmd, caddr_t data, int flags, struct proc *p)
259df930be7Sderaadt {
260d724e01aSderaadt struct ch_softc *sc = ch_cd.cd_devs[CHUNIT(dev)];
261d724e01aSderaadt int error = 0;
262df930be7Sderaadt
263cb3ad6e3Sdownsj /*
264cb3ad6e3Sdownsj * If this command can change the device's state, we must
265cb3ad6e3Sdownsj * have the device open for writing.
266cb3ad6e3Sdownsj */
267cb3ad6e3Sdownsj switch (cmd) {
268cb3ad6e3Sdownsj case CHIOGPICKER:
269cb3ad6e3Sdownsj case CHIOGPARAMS:
270cb3ad6e3Sdownsj case CHIOGSTATUS:
271cb3ad6e3Sdownsj break;
272cb3ad6e3Sdownsj
273cb3ad6e3Sdownsj default:
2741b9e05ceSkrw if (!ISSET(flags, FWRITE))
2750af55edbSkrw return EBADF;
276cb3ad6e3Sdownsj }
277cb3ad6e3Sdownsj
278df930be7Sderaadt switch (cmd) {
279d724e01aSderaadt case CHIOMOVE:
280d724e01aSderaadt error = ch_move(sc, (struct changer_move *)data);
281df930be7Sderaadt break;
282d724e01aSderaadt
283d724e01aSderaadt case CHIOEXCHANGE:
284d724e01aSderaadt error = ch_exchange(sc, (struct changer_exchange *)data);
285d724e01aSderaadt break;
286d724e01aSderaadt
287d724e01aSderaadt case CHIOPOSITION:
288d724e01aSderaadt error = ch_position(sc, (struct changer_position *)data);
289d724e01aSderaadt break;
290d724e01aSderaadt
291d724e01aSderaadt case CHIOGPICKER:
292d724e01aSderaadt *(int *)data = sc->sc_picker - sc->sc_firsts[CHET_MT];
293d724e01aSderaadt break;
294d724e01aSderaadt
295d724e01aSderaadt case CHIOSPICKER: {
296d724e01aSderaadt int new_picker = *(int *)data;
297d724e01aSderaadt
298d724e01aSderaadt if (new_picker > (sc->sc_counts[CHET_MT] - 1))
2990af55edbSkrw return EINVAL;
300d724e01aSderaadt sc->sc_picker = sc->sc_firsts[CHET_MT] + new_picker;
301d724e01aSderaadt break; }
302d724e01aSderaadt
303d724e01aSderaadt case CHIOGPARAMS: {
304d724e01aSderaadt struct changer_params *cp = (struct changer_params *)data;
305d724e01aSderaadt
306d724e01aSderaadt cp->cp_curpicker = sc->sc_picker - sc->sc_firsts[CHET_MT];
307d724e01aSderaadt cp->cp_npickers = sc->sc_counts[CHET_MT];
308d724e01aSderaadt cp->cp_nslots = sc->sc_counts[CHET_ST];
309d724e01aSderaadt cp->cp_nportals = sc->sc_counts[CHET_IE];
310d724e01aSderaadt cp->cp_ndrives = sc->sc_counts[CHET_DT];
311d724e01aSderaadt break; }
312d724e01aSderaadt
313d724e01aSderaadt case CHIOGSTATUS: {
3147459bcebSbeck struct changer_element_status_request *cesr =
3157459bcebSbeck (struct changer_element_status_request *)data;
316d724e01aSderaadt
3177459bcebSbeck error = ch_usergetelemstatus(sc, cesr);
318d724e01aSderaadt break; }
319d724e01aSderaadt
320d724e01aSderaadt /* Implement prevent/allow? */
321d724e01aSderaadt
322df930be7Sderaadt default:
323fdca2419Sdlg error = scsi_do_ioctl(sc->sc_link, cmd, data, flags);
324d724e01aSderaadt break;
325df930be7Sderaadt }
326d724e01aSderaadt
3270af55edbSkrw return error;
328df930be7Sderaadt }
329df930be7Sderaadt
330df930be7Sderaadt int
ch_move(struct ch_softc * sc,struct changer_move * cm)3310dbfc23eSmatthew ch_move(struct ch_softc *sc, struct changer_move *cm)
332df930be7Sderaadt {
333f8bbb75aSkrw struct scsi_move_medium *cmd;
334f8bbb75aSkrw struct scsi_xfer *xs;
335f8bbb75aSkrw int error;
336d724e01aSderaadt u_int16_t fromelem, toelem;
337df930be7Sderaadt
338d724e01aSderaadt /*
339d724e01aSderaadt * Check arguments.
340d724e01aSderaadt */
341d724e01aSderaadt if ((cm->cm_fromtype > CHET_DT) || (cm->cm_totype > CHET_DT))
3420af55edbSkrw return EINVAL;
343d724e01aSderaadt if ((cm->cm_fromunit > (sc->sc_counts[cm->cm_fromtype] - 1)) ||
344d724e01aSderaadt (cm->cm_tounit > (sc->sc_counts[cm->cm_totype] - 1)))
3450af55edbSkrw return ENODEV;
346df930be7Sderaadt
347d724e01aSderaadt /*
348d724e01aSderaadt * Check the request against the changer's capabilities.
349d724e01aSderaadt */
350d724e01aSderaadt if ((sc->sc_movemask[cm->cm_fromtype] & (1 << cm->cm_totype)) == 0)
3510af55edbSkrw return EINVAL;
352d724e01aSderaadt
353d724e01aSderaadt /*
354d724e01aSderaadt * Calculate the source and destination elements.
355d724e01aSderaadt */
356d724e01aSderaadt fromelem = sc->sc_firsts[cm->cm_fromtype] + cm->cm_fromunit;
357d724e01aSderaadt toelem = sc->sc_firsts[cm->cm_totype] + cm->cm_tounit;
358d724e01aSderaadt
359d724e01aSderaadt /*
360d724e01aSderaadt * Build the SCSI command.
361d724e01aSderaadt */
362f8bbb75aSkrw xs = scsi_xs_get(sc->sc_link, 0);
363f8bbb75aSkrw if (xs == NULL)
3640af55edbSkrw return ENOMEM;
365f8bbb75aSkrw xs->cmdlen = sizeof(*cmd);
366f8bbb75aSkrw xs->retries = CHRETRIES;
367f8bbb75aSkrw xs->timeout = 100000;
368d724e01aSderaadt
369664c6166Skrw cmd = (struct scsi_move_medium *)&xs->cmd;
37049227f1aSmatthew cmd->opcode = MOVE_MEDIUM;
371f8bbb75aSkrw _lto2b(sc->sc_picker, cmd->tea);
372f8bbb75aSkrw _lto2b(fromelem, cmd->src);
373f8bbb75aSkrw _lto2b(toelem, cmd->dst);
374c3094a8aSkrw if (ISSET(cm->cm_flags, CM_INVERT))
375dacf4336Skrw SET(cmd->flags, MOVE_MEDIUM_INVERT);
376f8bbb75aSkrw
377f8bbb75aSkrw error = scsi_xs_sync(xs);
378f8bbb75aSkrw scsi_xs_put(xs);
379f8bbb75aSkrw
3800af55edbSkrw return error;
381df930be7Sderaadt }
382df930be7Sderaadt
383df930be7Sderaadt int
ch_exchange(struct ch_softc * sc,struct changer_exchange * ce)3840dbfc23eSmatthew ch_exchange(struct ch_softc *sc, struct changer_exchange *ce)
385df930be7Sderaadt {
386f8bbb75aSkrw struct scsi_exchange_medium *cmd;
387f8bbb75aSkrw struct scsi_xfer *xs;
388f8bbb75aSkrw int error;
389d724e01aSderaadt u_int16_t src, dst1, dst2;
390df930be7Sderaadt
391d724e01aSderaadt /*
392d724e01aSderaadt * Check arguments.
393d724e01aSderaadt */
394d724e01aSderaadt if ((ce->ce_srctype > CHET_DT) || (ce->ce_fdsttype > CHET_DT) ||
395d724e01aSderaadt (ce->ce_sdsttype > CHET_DT))
3960af55edbSkrw return EINVAL;
397d724e01aSderaadt if ((ce->ce_srcunit > (sc->sc_counts[ce->ce_srctype] - 1)) ||
398d724e01aSderaadt (ce->ce_fdstunit > (sc->sc_counts[ce->ce_fdsttype] - 1)) ||
399d724e01aSderaadt (ce->ce_sdstunit > (sc->sc_counts[ce->ce_sdsttype] - 1)))
4000af55edbSkrw return ENODEV;
401d724e01aSderaadt
402d724e01aSderaadt /*
403d724e01aSderaadt * Check the request against the changer's capabilities.
404d724e01aSderaadt */
405d724e01aSderaadt if (((sc->sc_exchangemask[ce->ce_srctype] &
406d724e01aSderaadt (1 << ce->ce_fdsttype)) == 0) ||
407d724e01aSderaadt ((sc->sc_exchangemask[ce->ce_fdsttype] &
408d724e01aSderaadt (1 << ce->ce_sdsttype)) == 0))
4090af55edbSkrw return EINVAL;
410d724e01aSderaadt
411d724e01aSderaadt /*
412d724e01aSderaadt * Calculate the source and destination elements.
413d724e01aSderaadt */
414d724e01aSderaadt src = sc->sc_firsts[ce->ce_srctype] + ce->ce_srcunit;
415d724e01aSderaadt dst1 = sc->sc_firsts[ce->ce_fdsttype] + ce->ce_fdstunit;
416d724e01aSderaadt dst2 = sc->sc_firsts[ce->ce_sdsttype] + ce->ce_sdstunit;
417d724e01aSderaadt
418d724e01aSderaadt /*
419d724e01aSderaadt * Build the SCSI command.
420d724e01aSderaadt */
421f8bbb75aSkrw xs = scsi_xs_get(sc->sc_link, 0);
422f8bbb75aSkrw if (xs == NULL)
4230af55edbSkrw return ENOMEM;
424f8bbb75aSkrw xs->cmdlen = sizeof(*cmd);
425f8bbb75aSkrw xs->retries = CHRETRIES;
426f8bbb75aSkrw xs->timeout = 100000;
427d724e01aSderaadt
428664c6166Skrw cmd = (struct scsi_exchange_medium *)&xs->cmd;
42949227f1aSmatthew cmd->opcode = EXCHANGE_MEDIUM;
430f8bbb75aSkrw _lto2b(sc->sc_picker, cmd->tea);
431f8bbb75aSkrw _lto2b(src, cmd->src);
432f8bbb75aSkrw _lto2b(dst1, cmd->fdst);
433f8bbb75aSkrw _lto2b(dst2, cmd->sdst);
434c3094a8aSkrw if (ISSET(ce->ce_flags, CE_INVERT1))
435dacf4336Skrw SET(cmd->flags, EXCHANGE_MEDIUM_INV1);
436c3094a8aSkrw if (ISSET(ce->ce_flags, CE_INVERT2))
437dacf4336Skrw SET(cmd->flags, EXCHANGE_MEDIUM_INV2);
438f8bbb75aSkrw
439f8bbb75aSkrw error = scsi_xs_sync(xs);
440f8bbb75aSkrw scsi_xs_put(xs);
441f8bbb75aSkrw
4420af55edbSkrw return error;
443df930be7Sderaadt }
444df930be7Sderaadt
445df930be7Sderaadt int
ch_position(struct ch_softc * sc,struct changer_position * cp)4460dbfc23eSmatthew ch_position(struct ch_softc *sc, struct changer_position *cp)
447df930be7Sderaadt {
448f8bbb75aSkrw struct scsi_position_to_element *cmd;
449f8bbb75aSkrw struct scsi_xfer *xs;
450f8bbb75aSkrw int error;
451d724e01aSderaadt u_int16_t dst;
452df930be7Sderaadt
453d724e01aSderaadt /*
454d724e01aSderaadt * Check arguments.
455d724e01aSderaadt */
456d724e01aSderaadt if (cp->cp_type > CHET_DT)
4570af55edbSkrw return EINVAL;
458d724e01aSderaadt if (cp->cp_unit > (sc->sc_counts[cp->cp_type] - 1))
4590af55edbSkrw return ENODEV;
460d724e01aSderaadt
461d724e01aSderaadt /*
462d724e01aSderaadt * Calculate the destination element.
463d724e01aSderaadt */
464d724e01aSderaadt dst = sc->sc_firsts[cp->cp_type] + cp->cp_unit;
465d724e01aSderaadt
466d724e01aSderaadt /*
467d724e01aSderaadt * Build the SCSI command.
468d724e01aSderaadt */
469f8bbb75aSkrw xs = scsi_xs_get(sc->sc_link, 0);
470f8bbb75aSkrw if (xs == NULL)
4710af55edbSkrw return ENOMEM;
472f8bbb75aSkrw xs->cmdlen = sizeof(*cmd);
473f8bbb75aSkrw xs->retries = CHRETRIES;
474f8bbb75aSkrw xs->timeout = 100000;
475d724e01aSderaadt
476664c6166Skrw cmd = (struct scsi_position_to_element *)&xs->cmd;
47749227f1aSmatthew cmd->opcode = POSITION_TO_ELEMENT;
478f8bbb75aSkrw _lto2b(sc->sc_picker, cmd->tea);
479f8bbb75aSkrw _lto2b(dst, cmd->dst);
480c3094a8aSkrw if (ISSET(cp->cp_flags, CP_INVERT))
481dacf4336Skrw SET(cmd->flags, POSITION_TO_ELEMENT_INVERT);
482f8bbb75aSkrw
483f8bbb75aSkrw error = scsi_xs_sync(xs);
484f8bbb75aSkrw scsi_xs_put(xs);
485f8bbb75aSkrw
4860af55edbSkrw return error;
487df930be7Sderaadt }
488df930be7Sderaadt
489df930be7Sderaadt /*
4907459bcebSbeck * Copy a volume tag to a volume_tag struct, converting SCSI byte order
4917459bcebSbeck * to host native byte order in the volume serial number. The volume
4927459bcebSbeck * label as returned by the changer is transferred to user mode as
4937459bcebSbeck * nul-terminated string. Volume labels are truncated at the first
4947459bcebSbeck * space, as suggested by SCSI-2.
4957459bcebSbeck */
4967459bcebSbeck static void
copy_voltag(struct changer_voltag * uvoltag,struct volume_tag * voltag)4977459bcebSbeck copy_voltag(struct changer_voltag *uvoltag, struct volume_tag *voltag)
4987459bcebSbeck {
4997459bcebSbeck int i;
5007459bcebSbeck
5017459bcebSbeck for (i=0; i<CH_VOLTAG_MAXLEN; i++) {
5027459bcebSbeck char c = voltag->vif[i];
5037459bcebSbeck if (c && c != ' ')
5047459bcebSbeck uvoltag->cv_volid[i] = c;
5057459bcebSbeck else
5067459bcebSbeck break;
5077459bcebSbeck }
5087459bcebSbeck uvoltag->cv_volid[i] = '\0';
5097459bcebSbeck uvoltag->cv_serial = _2btol(voltag->vsn);
5107459bcebSbeck }
5117459bcebSbeck
5127459bcebSbeck /*
513*b3af768dSjsg * Copy an element status descriptor to a user-mode
5147459bcebSbeck * changer_element_status structure.
5157459bcebSbeck */
5167459bcebSbeck static void
copy_element_status(struct ch_softc * sc,int flags,struct read_element_status_descriptor * desc,struct changer_element_status * ces)517a3f7ec94Srobert copy_element_status(struct ch_softc *sc, int flags,
518a3f7ec94Srobert struct read_element_status_descriptor *desc,
5197459bcebSbeck struct changer_element_status *ces)
5207459bcebSbeck {
521a3f7ec94Srobert u_int16_t eaddr = _2btol(desc->eaddr);
522a3f7ec94Srobert u_int16_t et;
523a3f7ec94Srobert
524a3f7ec94Srobert for (et = CHET_MT; et <= CHET_DT; et++) {
525a3f7ec94Srobert if ((sc->sc_firsts[et] <= eaddr)
526a3f7ec94Srobert && ((sc->sc_firsts[et] + sc->sc_counts[et])
527a3f7ec94Srobert > eaddr)) {
528a3f7ec94Srobert ces->ces_addr = eaddr - sc->sc_firsts[et];
529a3f7ec94Srobert ces->ces_type = et;
530a3f7ec94Srobert break;
531a3f7ec94Srobert }
532a3f7ec94Srobert }
533a3f7ec94Srobert
5347459bcebSbeck ces->ces_flags = desc->flags1;
5357459bcebSbeck
536a3f7ec94Srobert ces->ces_sensecode = desc->sense_code;
537a3f7ec94Srobert ces->ces_sensequal = desc->sense_qual;
538a3f7ec94Srobert
539a3f7ec94Srobert if (desc->flags2 & READ_ELEMENT_STATUS_INVERT)
540a3f7ec94Srobert ces->ces_flags |= READ_ELEMENT_STATUS_EXCEPT;
541a3f7ec94Srobert
542a3f7ec94Srobert if (desc->flags2 & READ_ELEMENT_STATUS_SVALID) {
543a3f7ec94Srobert eaddr = _2btol(desc->ssea);
544a3f7ec94Srobert
545a3f7ec94Srobert /* convert source address to logical format */
546a3f7ec94Srobert for (et = CHET_MT; et <= CHET_DT; et++) {
547a3f7ec94Srobert if ((sc->sc_firsts[et] <= eaddr)
548a3f7ec94Srobert && ((sc->sc_firsts[et] + sc->sc_counts[et])
549a3f7ec94Srobert > eaddr)) {
550a3f7ec94Srobert ces->ces_source_addr =
551a3f7ec94Srobert eaddr - sc->sc_firsts[et];
552a3f7ec94Srobert ces->ces_source_type = et;
553a3f7ec94Srobert ces->ces_flags |= READ_ELEMENT_STATUS_ACCESS;
554a3f7ec94Srobert break;
555a3f7ec94Srobert }
556a3f7ec94Srobert }
557a3f7ec94Srobert
558a3f7ec94Srobert if (!(ces->ces_flags & READ_ELEMENT_STATUS_ACCESS))
559a3f7ec94Srobert printf("ch: warning: could not map element source "
560a3f7ec94Srobert "address %ud to a valid element type\n",
561a3f7ec94Srobert eaddr);
562a3f7ec94Srobert }
563a3f7ec94Srobert
564c3094a8aSkrw if (ISSET(flags, READ_ELEMENT_STATUS_PVOLTAG))
5657459bcebSbeck copy_voltag(&ces->ces_pvoltag, &desc->pvoltag);
566c3094a8aSkrw if (ISSET(flags, READ_ELEMENT_STATUS_AVOLTAG))
5677459bcebSbeck copy_voltag(&ces->ces_avoltag, &desc->avoltag);
5687459bcebSbeck }
5697459bcebSbeck
5707459bcebSbeck /*
571d724e01aSderaadt * Perform a READ ELEMENT STATUS on behalf of the user, and return to
572d724e01aSderaadt * the user only the data the user is interested in (i.e. an array of
5737459bcebSbeck * changer_element_status structures)
574df930be7Sderaadt */
575df930be7Sderaadt int
ch_usergetelemstatus(struct ch_softc * sc,struct changer_element_status_request * cesr)5760dbfc23eSmatthew ch_usergetelemstatus(struct ch_softc *sc,
5770dbfc23eSmatthew struct changer_element_status_request *cesr)
578df930be7Sderaadt {
5797459bcebSbeck struct changer_element_status *user_data = NULL;
580d724e01aSderaadt struct read_element_status_header *st_hdr;
581d724e01aSderaadt struct read_element_status_page_header *pg_hdr;
58234c0ba7eSbeck caddr_t desc;
583d724e01aSderaadt caddr_t data = NULL;
5847459bcebSbeck size_t size, desclen, udsize;
5850af55edbSkrw int avail, chet, i, want_voltags;
5860af55edbSkrw int error = 0;
5870af55edbSkrw
5880af55edbSkrw chet = cesr->cesr_type;
5890af55edbSkrw want_voltags = (cesr->cesr_flags & CESR_VOLTAGS) ? 1 : 0;
590df930be7Sderaadt
591df930be7Sderaadt /*
592d724e01aSderaadt * If there are no elements of the requested type in the changer,
593d724e01aSderaadt * the request is invalid.
594df930be7Sderaadt */
595d724e01aSderaadt if (sc->sc_counts[chet] == 0)
5960af55edbSkrw return EINVAL;
597df930be7Sderaadt
598df930be7Sderaadt /*
599d724e01aSderaadt * Request one descriptor for the given element type. This
600d724e01aSderaadt * is used to determine the size of the descriptor so that
601d724e01aSderaadt * we can allocate enough storage for all of them. We assume
602d724e01aSderaadt * that the first one can fit into 1k.
603df930be7Sderaadt */
6045c0b007dSderaadt size = 1024;
6055c0b007dSderaadt data = dma_alloc(size, PR_WAITOK);
6065c0b007dSderaadt error = ch_getelemstatus(sc, sc->sc_firsts[chet], 1, data, size,
6077459bcebSbeck want_voltags);
60805c14d82Sderaadt if (error)
609d724e01aSderaadt goto done;
610d724e01aSderaadt
611d724e01aSderaadt st_hdr = (struct read_element_status_header *)data;
61234c0ba7eSbeck pg_hdr = (struct read_element_status_page_header *) (st_hdr + 1);
613d724e01aSderaadt desclen = _2btol(pg_hdr->edl);
614d724e01aSderaadt
6155c0b007dSderaadt dma_free(data, size);
616df930be7Sderaadt
617df930be7Sderaadt /*
618d724e01aSderaadt * Reallocate storage for descriptors and get them from the
619d724e01aSderaadt * device.
620df930be7Sderaadt */
6215c0b007dSderaadt size = sizeof(struct read_element_status_header) +
6225c0b007dSderaadt sizeof(struct read_element_status_page_header) +
6235c0b007dSderaadt (desclen * sc->sc_counts[chet]);
6245c0b007dSderaadt data = dma_alloc(size, PR_WAITOK);
62505c14d82Sderaadt error = ch_getelemstatus(sc, sc->sc_firsts[chet],
6267459bcebSbeck sc->sc_counts[chet], data, size, want_voltags);
62705c14d82Sderaadt if (error)
628d724e01aSderaadt goto done;
629d724e01aSderaadt
630d724e01aSderaadt /*
631d724e01aSderaadt * Fill in the user status array.
632d724e01aSderaadt */
633d724e01aSderaadt st_hdr = (struct read_element_status_header *)data;
63434c0ba7eSbeck pg_hdr = (struct read_element_status_page_header *) (st_hdr + 1);
6357459bcebSbeck
636d724e01aSderaadt avail = _2btol(st_hdr->count);
6376d4a5e5aSbeck if (avail != sc->sc_counts[chet]) {
6386d4a5e5aSbeck error = EINVAL;
6396d4a5e5aSbeck goto done;
6406d4a5e5aSbeck }
641d724e01aSderaadt
6425f2418a7Sderaadt user_data = mallocarray(avail, sizeof(struct changer_element_status),
6435f2418a7Sderaadt M_DEVBUF, M_WAITOK | M_ZERO);
6445f2418a7Sderaadt udsize = avail * sizeof(struct changer_element_status);
645d724e01aSderaadt
64634c0ba7eSbeck desc = (caddr_t)(pg_hdr + 1);
647d724e01aSderaadt for (i = 0; i < avail; ++i) {
6487459bcebSbeck struct changer_element_status *ces = &(user_data[i]);
649a3f7ec94Srobert copy_element_status(sc, pg_hdr->flags,
65034c0ba7eSbeck (struct read_element_status_descriptor *)desc, ces);
65134c0ba7eSbeck desc += desclen;
652d724e01aSderaadt }
653d724e01aSderaadt
6547459bcebSbeck /* Copy array out to userspace. */
6557459bcebSbeck error = copyout(user_data, cesr->cesr_data, udsize);
656d724e01aSderaadt
657d724e01aSderaadt done:
658d724e01aSderaadt if (data != NULL)
6595c0b007dSderaadt dma_free(data, size);
660d724e01aSderaadt if (user_data != NULL)
661a67129dbStedu free(user_data, M_DEVBUF, udsize);
6620af55edbSkrw return error;
663d724e01aSderaadt }
664d724e01aSderaadt
665d724e01aSderaadt int
ch_getelemstatus(struct ch_softc * sc,int first,int count,caddr_t data,size_t datalen,int voltag)6660dbfc23eSmatthew ch_getelemstatus(struct ch_softc *sc, int first, int count, caddr_t data,
6670dbfc23eSmatthew size_t datalen, int voltag)
668d724e01aSderaadt {
669f8bbb75aSkrw struct scsi_read_element_status *cmd;
670f8bbb75aSkrw struct scsi_xfer *xs;
671f8bbb75aSkrw int error;
672d724e01aSderaadt
673d724e01aSderaadt /*
674d724e01aSderaadt * Build SCSI command.
675d724e01aSderaadt */
676f8bbb75aSkrw xs = scsi_xs_get(sc->sc_link, SCSI_DATA_IN);
677f8bbb75aSkrw if (xs == NULL)
6780af55edbSkrw return ENOMEM;
679f8bbb75aSkrw xs->cmdlen = sizeof(*cmd);
680f8bbb75aSkrw xs->data = data;
681f8bbb75aSkrw xs->datalen = datalen;
682f8bbb75aSkrw xs->retries = CHRETRIES;
683f8bbb75aSkrw xs->timeout = 100000;
684f8bbb75aSkrw
685664c6166Skrw cmd = (struct scsi_read_element_status *)&xs->cmd;
68649227f1aSmatthew cmd->opcode = READ_ELEMENT_STATUS;
687f8bbb75aSkrw _lto2b(first, cmd->sea);
688f8bbb75aSkrw _lto2b(count, cmd->count);
689f8bbb75aSkrw _lto3b(datalen, cmd->len);
6907459bcebSbeck if (voltag)
691dacf4336Skrw SET(cmd->byte2, READ_ELEMENT_STATUS_VOLTAG);
692d724e01aSderaadt
693f8bbb75aSkrw error = scsi_xs_sync(xs);
694f8bbb75aSkrw scsi_xs_put(xs);
695f8bbb75aSkrw
6960af55edbSkrw return error;
697d724e01aSderaadt }
698d724e01aSderaadt
699d724e01aSderaadt /*
700d724e01aSderaadt * Ask the device about itself and fill in the parameters in our
701d724e01aSderaadt * softc.
702d724e01aSderaadt */
703d724e01aSderaadt int
ch_get_params(struct ch_softc * sc,int flags)7040dbfc23eSmatthew ch_get_params(struct ch_softc *sc, int flags)
705d724e01aSderaadt {
70624b6d99aSkrw union scsi_mode_sense_buf *data;
7073b4fabc5Skrw struct page_element_address_assignment *ea;
7083b4fabc5Skrw struct page_device_capabilities *cap;
709d724e01aSderaadt u_int8_t *moves, *exchanges;
7100af55edbSkrw int big, error, from;
711d724e01aSderaadt
7125c0b007dSderaadt data = dma_alloc(sizeof(*data), PR_NOWAIT);
713b45f7966Skrw if (data == NULL)
7140af55edbSkrw return ENOMEM;
715b45f7966Skrw
716d724e01aSderaadt /*
71708d7d9d6Skrw * Grab info from the element address assignment page (0x1d).
718d724e01aSderaadt */
719f82a5783Skrw error = scsi_do_mode_sense(sc->sc_link, EA_PAGE, data,
72085f9847cSkrw (void **)&ea, sizeof(*ea), flags, &big);
721b45f7966Skrw if (error == 0 && ea == NULL)
7223b4fabc5Skrw error = EIO;
7233b4fabc5Skrw if (error != 0) {
7246d4a5e5aSbeck #ifdef CHANGER_DEBUG
72505c14d82Sderaadt printf("%s: could not sense element address page\n",
72605c14d82Sderaadt sc->sc_dev.dv_xname);
727364ebb70Skrw #endif /* CHANGER_DEBUG */
7285c0b007dSderaadt dma_free(data, sizeof(*data));
7290af55edbSkrw return error;
730df930be7Sderaadt }
731df930be7Sderaadt
7323b4fabc5Skrw sc->sc_firsts[CHET_MT] = _2btol(ea->mtea);
7333b4fabc5Skrw sc->sc_counts[CHET_MT] = _2btol(ea->nmte);
7343b4fabc5Skrw sc->sc_firsts[CHET_ST] = _2btol(ea->fsea);
7353b4fabc5Skrw sc->sc_counts[CHET_ST] = _2btol(ea->nse);
7363b4fabc5Skrw sc->sc_firsts[CHET_IE] = _2btol(ea->fieea);
7373b4fabc5Skrw sc->sc_counts[CHET_IE] = _2btol(ea->niee);
7383b4fabc5Skrw sc->sc_firsts[CHET_DT] = _2btol(ea->fdtea);
7393b4fabc5Skrw sc->sc_counts[CHET_DT] = _2btol(ea->ndte);
740d724e01aSderaadt
7413b4fabc5Skrw /* XXX Ask for transport geometry page. */
742df930be7Sderaadt
743df930be7Sderaadt /*
74408d7d9d6Skrw * Grab info from the capabilities page (0x1f).
745df930be7Sderaadt */
746f82a5783Skrw error = scsi_do_mode_sense(sc->sc_link, CAP_PAGE, data,
74785f9847cSkrw (void **)&cap, sizeof(*cap), flags, &big);
748050be8afSkrw if (error == 0 && cap == NULL)
7493b4fabc5Skrw error = EIO;
7503b4fabc5Skrw if (error != 0) {
7516d4a5e5aSbeck #ifdef CHANGER_DEBUG
75205c14d82Sderaadt printf("%s: could not sense capabilities page\n",
75305c14d82Sderaadt sc->sc_dev.dv_xname);
754364ebb70Skrw #endif /* CHANGER_DEBUG */
7555c0b007dSderaadt dma_free(data, sizeof(*data));
7560af55edbSkrw return error;
757df930be7Sderaadt }
758d724e01aSderaadt
759d724e01aSderaadt bzero(sc->sc_movemask, sizeof(sc->sc_movemask));
760d724e01aSderaadt bzero(sc->sc_exchangemask, sizeof(sc->sc_exchangemask));
7613b4fabc5Skrw moves = &cap->move_from_mt;
7623b4fabc5Skrw exchanges = &cap->exchange_with_mt;
763d724e01aSderaadt for (from = CHET_MT; from <= CHET_DT; ++from) {
764d724e01aSderaadt sc->sc_movemask[from] = moves[from];
765d724e01aSderaadt sc->sc_exchangemask[from] = exchanges[from];
766df930be7Sderaadt }
767d724e01aSderaadt
768dacf4336Skrw SET(sc->sc_link->flags, SDEV_MEDIA_LOADED);
7695c0b007dSderaadt dma_free(data, sizeof(*data));
7700af55edbSkrw return 0;
771df930be7Sderaadt }
772cb3ad6e3Sdownsj
773cb3ad6e3Sdownsj void
ch_get_quirks(struct ch_softc * sc,struct scsi_inquiry_data * inqbuf)7740dbfc23eSmatthew ch_get_quirks(struct ch_softc *sc, struct scsi_inquiry_data *inqbuf)
775cb3ad6e3Sdownsj {
776697fee68Smickey const struct chquirk *match;
777cb3ad6e3Sdownsj int priority;
778cb3ad6e3Sdownsj
779cb3ad6e3Sdownsj sc->sc_settledelay = 0;
780cb3ad6e3Sdownsj
781697fee68Smickey match = (const struct chquirk *)scsi_inqmatch(inqbuf,
782cb3ad6e3Sdownsj (caddr_t)chquirks,
783cb3ad6e3Sdownsj sizeof(chquirks) / sizeof(chquirks[0]),
784cb3ad6e3Sdownsj sizeof(chquirks[0]), &priority);
785cb3ad6e3Sdownsj if (priority != 0) {
786cb3ad6e3Sdownsj sc->sc_settledelay = match->cq_settledelay;
787cb3ad6e3Sdownsj }
788cb3ad6e3Sdownsj }
789823e35f2Sbeck
790823e35f2Sbeck /*
791e471ee1cSjsg * Look at the returned sense and act on the error to determine
792e471ee1cSjsg * the unix error number to pass back... (0 = report no error)
793823e35f2Sbeck * (-1 = continue processing)
794823e35f2Sbeck */
795823e35f2Sbeck int
ch_interpret_sense(struct scsi_xfer * xs)7960dbfc23eSmatthew ch_interpret_sense(struct scsi_xfer *xs)
797823e35f2Sbeck {
798823e35f2Sbeck struct scsi_sense_data *sense = &xs->sense;
7996d4b3493Skrw struct scsi_link *link = xs->sc_link;
8000af55edbSkrw u_int8_t serr, skey;
8010af55edbSkrw
8020af55edbSkrw serr = sense->error_code & SSD_ERRCODE;
8030af55edbSkrw skey = sense->flags & SSD_KEY;
804823e35f2Sbeck
8051b9e05ceSkrw if (!ISSET(link->flags, SDEV_OPEN) ||
8061d951d12Sbeck (serr != SSD_ERRCODE_CURRENT && serr != SSD_ERRCODE_DEFERRED))
8070af55edbSkrw return scsi_interpret_sense(xs);
808823e35f2Sbeck
809823e35f2Sbeck switch (skey) {
810823e35f2Sbeck
811823e35f2Sbeck /*
8120af55edbSkrw * We do custom processing in ch for the unit becoming ready
8130af55edbSkrw * case. in this case we do not allow xs->retries to be
8140af55edbSkrw * decremented only on the "Unit Becoming Ready" case. This is
8150af55edbSkrw * because tape changers report "Unit Becoming Ready" when they
8160af55edbSkrw * rescan their state (i.e. when the door got opened) and can
8170af55edbSkrw * take a long time for large units. Rather than having a
8180af55edbSkrw * massive timeout for all operations (which would cause other
81984f3acfdSjsg * problems) we allow changers to wait (but be interruptible
8200af55edbSkrw * with Ctrl-C) forever as long as they are reporting that they
8210af55edbSkrw * are becoming ready. all other cases are handled as per the
8220af55edbSkrw * default.
823823e35f2Sbeck */
824823e35f2Sbeck case SKEY_NOT_READY:
8250e3cac37Skrw if (ISSET(xs->flags, SCSI_IGNORE_NOT_READY))
8260af55edbSkrw return 0;
827bca89e64Sbeck switch (ASC_ASCQ(sense)) {
828bca89e64Sbeck case SENSE_NOT_READY_BECOMING_READY:
8296d4b3493Skrw SC_DEBUG(link, SDEV_DB1, ("not ready: busy (%#x)\n",
830823e35f2Sbeck sense->add_sense_code_qual));
831823e35f2Sbeck /* don't count this as a retry */
832823e35f2Sbeck xs->retries++;
8330af55edbSkrw return scsi_delay(xs, 1);
834823e35f2Sbeck default:
8350af55edbSkrw return scsi_interpret_sense(xs);
836823e35f2Sbeck }
837823e35f2Sbeck default:
8380af55edbSkrw return scsi_interpret_sense(xs);
839823e35f2Sbeck }
840823e35f2Sbeck }
841