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[SCSI] NCR5380: fix section mismatch
[net-next-2.6.git] / drivers / scsi / ch.c
CommitLineData
daa6eda6
GK		 1/*
2 * SCSI Media Changer device driver for Linux 2.6
3 *
4 * (c) 1996-2003 Gerd Knorr <kraxel@bytesex.org>
5 *
6 */
7
8#define VERSION "0.25"
9
daa6eda6
GK		 10#include <linux/module.h>
11#include <linux/init.h>
12#include <linux/fs.h>
13#include <linux/kernel.h>
daa6eda6
GK		 14#include <linux/mm.h>
15#include <linux/major.h>
16#include <linux/string.h>
17#include <linux/errno.h>
18#include <linux/interrupt.h>
19#include <linux/blkdev.h>
20#include <linux/completion.h>
daa6eda6
GK		 21#include <linux/compat.h>
22#include <linux/chio.h> /* here are all the ioctls */
0b950672 23#include <linux/mutex.h>
daa6eda6
GK		 24
25#include <scsi/scsi.h>
26#include <scsi/scsi_cmnd.h>
27#include <scsi/scsi_driver.h>
28#include <scsi/scsi_ioctl.h>
29#include <scsi/scsi_host.h>
30#include <scsi/scsi_device.h>
84743bbc 31#include <scsi/scsi_eh.h>
daa6eda6
GK		 32#include <scsi/scsi_dbg.h>
33
34#define CH_DT_MAX 16
35#define CH_TYPES 8
36
37MODULE_DESCRIPTION("device driver for scsi media changer devices");
38MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org>");
39MODULE_LICENSE("GPL");
f018fa55 40MODULE_ALIAS_CHARDEV_MAJOR(SCSI_CHANGER_MAJOR);
daa6eda6
GK		 41
42static int init = 1;
43module_param(init, int, 0444);
44MODULE_PARM_DESC(init, \
45 "initialize element status on driver load (default: on)");
46
47static int timeout_move = 300;
48module_param(timeout_move, int, 0644);
49MODULE_PARM_DESC(timeout_move,"timeout for move commands "
50 "(default: 300 seconds)");
51
52static int timeout_init = 3600;
53module_param(timeout_init, int, 0644);
54MODULE_PARM_DESC(timeout_init,"timeout for INITIALIZE ELEMENT STATUS "
55 "(default: 3600 seconds)");
56
57static int verbose = 1;
58module_param(verbose, int, 0644);
59MODULE_PARM_DESC(verbose,"be verbose (default: on)");
60
61static int debug = 0;
62module_param(debug, int, 0644);
63MODULE_PARM_DESC(debug,"enable/disable debug messages, also prints more "
64 "detailed sense codes on scsi errors (default: off)");
65
66static int dt_id[CH_DT_MAX] = { [ 0 ... (CH_DT_MAX-1) ] = -1 };
67static int dt_lun[CH_DT_MAX];
68module_param_array(dt_id, int, NULL, 0444);
69module_param_array(dt_lun, int, NULL, 0444);
70
71/* tell the driver about vendor-specific slots */
72static int vendor_firsts[CH_TYPES-4];
73static int vendor_counts[CH_TYPES-4];
74module_param_array(vendor_firsts, int, NULL, 0444);
75module_param_array(vendor_counts, int, NULL, 0444);
76
0ad78200 77static const char * vendor_labels[CH_TYPES-4] = {
daa6eda6
GK		 78 "v0", "v1", "v2", "v3"
79};
80// module_param_string_array(vendor_labels, NULL, 0444);
81
82#define dprintk(fmt, arg...) if (debug) \
83 printk(KERN_DEBUG "%s: " fmt, ch->name , ## arg)
84#define vprintk(fmt, arg...) if (verbose) \
85 printk(KERN_INFO "%s: " fmt, ch->name , ## arg)
86
87/* ------------------------------------------------------------------- */
88
89#define MAX_RETRIES 1
90
91static int ch_probe(struct device *);
92static int ch_remove(struct device *);
93static int ch_open(struct inode * inode, struct file * filp);
94static int ch_release(struct inode * inode, struct file * filp);
f7fea185 95static long ch_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
daa6eda6
GK		 96#ifdef CONFIG_COMPAT
97static long ch_ioctl_compat(struct file * filp,
98 unsigned int cmd, unsigned long arg);
99#endif
100
21feb5cc 101static struct class * ch_sysfs_class;
daa6eda6
GK		 102
103typedef struct {
104 struct list_head list;
105 int minor;
106 char name[8];
107 struct scsi_device *device;
108 struct scsi_device **dt; /* ptrs to data transfer elements */
109 u_int firsts[CH_TYPES];
110 u_int counts[CH_TYPES];
111 u_int unit_attention;
112 u_int voltags;
0b950672 113 struct mutex lock;
daa6eda6
GK		 114} scsi_changer;
115
116static LIST_HEAD(ch_devlist);
a9f6a0dd 117static DEFINE_SPINLOCK(ch_devlist_lock);
daa6eda6
GK		 118static int ch_devcount;
119
120static struct scsi_driver ch_template =
121{
122 .owner = THIS_MODULE,
123 .gendrv = {
124 .name = "ch",
125 .probe = ch_probe,
126 .remove = ch_remove,
127 },
128};
129
00977a59 130static const struct file_operations changer_fops =
daa6eda6 131{
f7fea185
MS		 132 .owner = THIS_MODULE,
133 .open = ch_open,
134 .release = ch_release,
135 .unlocked_ioctl = ch_ioctl,
daa6eda6 136#ifdef CONFIG_COMPAT
f7fea185 137 .compat_ioctl = ch_ioctl_compat,
daa6eda6
GK		 138#endif
139};
140
0ad78200 141static const struct {
daa6eda6
GK		 142 unsigned char sense;
143 unsigned char asc;
144 unsigned char ascq;
145 int errno;
146} err[] = {
147/* Just filled in what looks right. Hav'nt checked any standard paper for
148 these errno assignments, so they may be wrong... */
149 {
150 .sense = ILLEGAL_REQUEST,
151 .asc = 0x21,
152 .ascq = 0x01,
153 .errno = EBADSLT, /* Invalid element address */
154 },{
155 .sense = ILLEGAL_REQUEST,
156 .asc = 0x28,
157 .ascq = 0x01,
158 .errno = EBADE, /* Import or export element accessed */
159 },{
160 .sense = ILLEGAL_REQUEST,
161 .asc = 0x3B,
162 .ascq = 0x0D,
163 .errno = EXFULL, /* Medium destination element full */
164 },{
165 .sense = ILLEGAL_REQUEST,
166 .asc = 0x3B,
167 .ascq = 0x0E,
168 .errno = EBADE, /* Medium source element empty */
169 },{
170 .sense = ILLEGAL_REQUEST,
171 .asc = 0x20,
172 .ascq = 0x00,
173 .errno = EBADRQC, /* Invalid command operation code */
174 },{
175 /* end of list */
176 }
177};
178
179/* ------------------------------------------------------------------- */
180
84743bbc 181static int ch_find_errno(struct scsi_sense_hdr *sshdr)
daa6eda6
GK		 182{
183 int i,errno = 0;
184
185 /* Check to see if additional sense information is available */
84743bbc
JB		 186 if (scsi_sense_valid(sshdr) &&
187 sshdr->asc != 0) {
daa6eda6 188 for (i = 0; err[i].errno != 0; i++) {
84743bbc
JB		 189 if (err[i].sense == sshdr->sense_key &&
190 err[i].asc == sshdr->asc &&
191 err[i].ascq == sshdr->ascq) {
daa6eda6
GK		 192 errno = -err[i].errno;
193 break;
194 }
195 }
196 }
197 if (errno == 0)
198 errno = -EIO;
199 return errno;
200}
201
202static int
203ch_do_scsi(scsi_changer *ch, unsigned char *cmd,
204 void *buffer, unsigned buflength,
205 enum dma_data_direction direction)
206{
84743bbc
JB		 207 int errno, retries = 0, timeout, result;
208 struct scsi_sense_hdr sshdr;
daa6eda6 209
daa6eda6
GK		 210 timeout = (cmd[0] == INITIALIZE_ELEMENT_STATUS)
211 ? timeout_init : timeout_move;
212
213 retry:
214 errno = 0;
215 if (debug) {
216 dprintk("command: ");
217 __scsi_print_command(cmd);
218 }
219
84743bbc
JB		 220 result = scsi_execute_req(ch->device, cmd, direction, buffer,
221 buflength, &sshdr, timeout * HZ,
222 MAX_RETRIES);
daa6eda6 223
84743bbc
JB		 224 dprintk("result: 0x%x\n",result);
225 if (driver_byte(result) & DRIVER_SENSE) {
daa6eda6 226 if (debug)
84743bbc
JB		 227 scsi_print_sense_hdr(ch->name, &sshdr);
228 errno = ch_find_errno(&sshdr);
daa6eda6 229
84743bbc 230 switch(sshdr.sense_key) {
daa6eda6
GK		 231 case UNIT_ATTENTION:
232 ch->unit_attention = 1;
233 if (retries++ < 3)
234 goto retry;
235 break;
236 }
237 }
daa6eda6
GK		 238 return errno;
239}
240
241/* ------------------------------------------------------------------------ */
242
243static int
244ch_elem_to_typecode(scsi_changer *ch, u_int elem)
245{
246 int i;
247
248 for (i = 0; i < CH_TYPES; i++) {
249 if (elem >= ch->firsts[i] &&
250 elem < ch->firsts[i] +
251 ch->counts[i])
252 return i+1;
253 }
254 return 0;
255}
256
257static int
258ch_read_element_status(scsi_changer *ch, u_int elem, char *data)
259{
260 u_char cmd[12];
261 u_char *buffer;
262 int result;
263
264 buffer = kmalloc(512, GFP_KERNEL | GFP_DMA);
265 if(!buffer)
266 return -ENOMEM;
267
268 retry:
269 memset(cmd,0,sizeof(cmd));
270 cmd[0] = READ_ELEMENT_STATUS;
271 cmd[1] = (ch->device->lun << 5) |
272 (ch->voltags ? 0x10 : 0) |
273 ch_elem_to_typecode(ch,elem);
274 cmd[2] = (elem >> 8) & 0xff;
275 cmd[3] = elem & 0xff;
276 cmd[5] = 1;
277 cmd[9] = 255;
278 if (0 == (result = ch_do_scsi(ch, cmd, buffer, 256, DMA_FROM_DEVICE))) {
279 if (((buffer[16] << 8) | buffer[17]) != elem) {
280 dprintk("asked for element 0x%02x, got 0x%02x\n",
281 elem,(buffer[16] << 8) | buffer[17]);
282 kfree(buffer);
283 return -EIO;
284 }
285 memcpy(data,buffer+16,16);
286 } else {
287 if (ch->voltags) {
288 ch->voltags = 0;
289 vprintk("device has no volume tag support\n");
290 goto retry;
291 }
292 dprintk("READ ELEMENT STATUS for element 0x%x failed\n",elem);
293 }
294 kfree(buffer);
295 return result;
296}
297
298static int
299ch_init_elem(scsi_changer *ch)
300{
301 int err;
302 u_char cmd[6];
303
304 vprintk("INITIALIZE ELEMENT STATUS, may take some time ...\n");
305 memset(cmd,0,sizeof(cmd));
306 cmd[0] = INITIALIZE_ELEMENT_STATUS;
307 cmd[1] = ch->device->lun << 5;
308 err = ch_do_scsi(ch, cmd, NULL, 0, DMA_NONE);
309 vprintk("... finished\n");
310 return err;
311}
312
313static int
314ch_readconfig(scsi_changer *ch)
315{
316 u_char cmd[10], data[16];
317 u_char *buffer;
318 int result,id,lun,i;
319 u_int elem;
320
4530a169 321 buffer = kzalloc(512, GFP_KERNEL | GFP_DMA);
daa6eda6
GK		 322 if (!buffer)
323 return -ENOMEM;
daa6eda6
GK		 324
325 memset(cmd,0,sizeof(cmd));
326 cmd[0] = MODE_SENSE;
327 cmd[1] = ch->device->lun << 5;
328 cmd[2] = 0x1d;
329 cmd[4] = 255;
330 result = ch_do_scsi(ch, cmd, buffer, 255, DMA_FROM_DEVICE);
331 if (0 != result) {
332 cmd[1] |= (1<<3);
333 result = ch_do_scsi(ch, cmd, buffer, 255, DMA_FROM_DEVICE);
334 }
335 if (0 == result) {
336 ch->firsts[CHET_MT] =
337 (buffer[buffer[3]+ 6] << 8) | buffer[buffer[3]+ 7];
338 ch->counts[CHET_MT] =
339 (buffer[buffer[3]+ 8] << 8) | buffer[buffer[3]+ 9];
340 ch->firsts[CHET_ST] =
341 (buffer[buffer[3]+10] << 8) | buffer[buffer[3]+11];
342 ch->counts[CHET_ST] =
343 (buffer[buffer[3]+12] << 8) | buffer[buffer[3]+13];
344 ch->firsts[CHET_IE] =
345 (buffer[buffer[3]+14] << 8) | buffer[buffer[3]+15];
346 ch->counts[CHET_IE] =
347 (buffer[buffer[3]+16] << 8) | buffer[buffer[3]+17];
348 ch->firsts[CHET_DT] =
349 (buffer[buffer[3]+18] << 8) | buffer[buffer[3]+19];
350 ch->counts[CHET_DT] =
351 (buffer[buffer[3]+20] << 8) | buffer[buffer[3]+21];
352 vprintk("type #1 (mt): 0x%x+%d [medium transport]\n",
353 ch->firsts[CHET_MT],
354 ch->counts[CHET_MT]);
355 vprintk("type #2 (st): 0x%x+%d [storage]\n",
356 ch->firsts[CHET_ST],
357 ch->counts[CHET_ST]);
358 vprintk("type #3 (ie): 0x%x+%d [import/export]\n",
359 ch->firsts[CHET_IE],
360 ch->counts[CHET_IE]);
361 vprintk("type #4 (dt): 0x%x+%d [data transfer]\n",
362 ch->firsts[CHET_DT],
363 ch->counts[CHET_DT]);
364 } else {
365 vprintk("reading element address assigment page failed!\n");
366 }
367
368 /* vendor specific element types */
369 for (i = 0; i < 4; i++) {
370 if (0 == vendor_counts[i])
371 continue;
372 if (NULL == vendor_labels[i])
373 continue;
374 ch->firsts[CHET_V1+i] = vendor_firsts[i];
375 ch->counts[CHET_V1+i] = vendor_counts[i];
376 vprintk("type #%d (v%d): 0x%x+%d [%s, vendor specific]\n",
377 i+5,i+1,vendor_firsts[i],vendor_counts[i],
378 vendor_labels[i]);
379 }
380
381 /* look up the devices of the data transfer elements */
382 ch->dt = kmalloc(ch->counts[CHET_DT]*sizeof(struct scsi_device),
383 GFP_KERNEL);
384 for (elem = 0; elem < ch->counts[CHET_DT]; elem++) {
385 id = -1;
386 lun = 0;
387 if (elem < CH_DT_MAX && -1 != dt_id[elem]) {
388 id = dt_id[elem];
389 lun = dt_lun[elem];
390 vprintk("dt 0x%x: [insmod option] ",
391 elem+ch->firsts[CHET_DT]);
392 } else if (0 != ch_read_element_status
393 (ch,elem+ch->firsts[CHET_DT],data)) {
394 vprintk("dt 0x%x: READ ELEMENT STATUS failed\n",
395 elem+ch->firsts[CHET_DT]);
396 } else {
397 vprintk("dt 0x%x: ",elem+ch->firsts[CHET_DT]);
398 if (data[6] & 0x80) {
399 if (verbose)
400 printk("not this SCSI bus\n");
401 ch->dt[elem] = NULL;
402 } else if (0 == (data[6] & 0x30)) {
403 if (verbose)
404 printk("ID/LUN unknown\n");
405 ch->dt[elem] = NULL;
406 } else {
407 id = ch->device->id;
408 lun = 0;
409 if (data[6] & 0x20) id = data[7];
410 if (data[6] & 0x10) lun = data[6] & 7;
411 }
412 }
413 if (-1 != id) {
414 if (verbose)
415 printk("ID %i, LUN %i, ",id,lun);
416 ch->dt[elem] =
417 scsi_device_lookup(ch->device->host,
418 ch->device->channel,
419 id,lun);
420 if (!ch->dt[elem]) {
421 /* should not happen */
422 if (verbose)
423 printk("Huh? device not found!\n");
424 } else {
425 if (verbose)
426 printk("name: %8.8s %16.16s %4.4s\n",
427 ch->dt[elem]->vendor,
428 ch->dt[elem]->model,
429 ch->dt[elem]->rev);
430 }
431 }
432 }
433 ch->voltags = 1;
434 kfree(buffer);
435
436 return 0;
437}
438
439/* ------------------------------------------------------------------------ */
440
441static int
442ch_position(scsi_changer *ch, u_int trans, u_int elem, int rotate)
443{
444 u_char cmd[10];
445
446 dprintk("position: 0x%x\n",elem);
447 if (0 == trans)
448 trans = ch->firsts[CHET_MT];
449 memset(cmd,0,sizeof(cmd));
450 cmd[0] = POSITION_TO_ELEMENT;
451 cmd[1] = ch->device->lun << 5;
452 cmd[2] = (trans >> 8) & 0xff;
453 cmd[3] = trans & 0xff;
454 cmd[4] = (elem >> 8) & 0xff;
455 cmd[5] = elem & 0xff;
456 cmd[8] = rotate ? 1 : 0;
457 return ch_do_scsi(ch, cmd, NULL, 0, DMA_NONE);
458}
459
460static int
461ch_move(scsi_changer *ch, u_int trans, u_int src, u_int dest, int rotate)
462{
463 u_char cmd[12];
464
465 dprintk("move: 0x%x => 0x%x\n",src,dest);
466 if (0 == trans)
467 trans = ch->firsts[CHET_MT];
468 memset(cmd,0,sizeof(cmd));
469 cmd[0] = MOVE_MEDIUM;
470 cmd[1] = ch->device->lun << 5;
471 cmd[2] = (trans >> 8) & 0xff;
472 cmd[3] = trans & 0xff;
473 cmd[4] = (src >> 8) & 0xff;
474 cmd[5] = src & 0xff;
475 cmd[6] = (dest >> 8) & 0xff;
476 cmd[7] = dest & 0xff;
477 cmd[10] = rotate ? 1 : 0;
478 return ch_do_scsi(ch, cmd, NULL,0, DMA_NONE);
479}
480
481static int
482ch_exchange(scsi_changer *ch, u_int trans, u_int src,
483 u_int dest1, u_int dest2, int rotate1, int rotate2)
484{
485 u_char cmd[12];
486
487 dprintk("exchange: 0x%x => 0x%x => 0x%x\n",
488 src,dest1,dest2);
489 if (0 == trans)
490 trans = ch->firsts[CHET_MT];
491 memset(cmd,0,sizeof(cmd));
492 cmd[0] = EXCHANGE_MEDIUM;
493 cmd[1] = ch->device->lun << 5;
494 cmd[2] = (trans >> 8) & 0xff;
495 cmd[3] = trans & 0xff;
496 cmd[4] = (src >> 8) & 0xff;
497 cmd[5] = src & 0xff;
498 cmd[6] = (dest1 >> 8) & 0xff;
499 cmd[7] = dest1 & 0xff;
500 cmd[8] = (dest2 >> 8) & 0xff;
501 cmd[9] = dest2 & 0xff;
502 cmd[10] = (rotate1 ? 1 : 0) | (rotate2 ? 2 : 0);
503
504 return ch_do_scsi(ch, cmd, NULL,0, DMA_NONE);
505}
506
507static void
508ch_check_voltag(char *tag)
509{
510 int i;
511
512 for (i = 0; i < 32; i++) {
513 /* restrict to ascii */
514 if (tag[i] >= 0x7f || tag[i] < 0x20)
515 tag[i] = ' ';
516 /* don't allow search wildcards */
517 if (tag[i] == '?' ||
518 tag[i] == '*')
519 tag[i] = ' ';
520 }
521}
522
523static int
524ch_set_voltag(scsi_changer *ch, u_int elem,
525 int alternate, int clear, u_char *tag)
526{
527 u_char cmd[12];
528 u_char *buffer;
529 int result;
530
4530a169 531 buffer = kzalloc(512, GFP_KERNEL);
daa6eda6
GK		 532 if (!buffer)
533 return -ENOMEM;
daa6eda6
GK		 534
535 dprintk("%s %s voltag: 0x%x => \"%s\"\n",
536 clear ? "clear" : "set",
537 alternate ? "alternate" : "primary",
538 elem, tag);
539 memset(cmd,0,sizeof(cmd));
540 cmd[0] = SEND_VOLUME_TAG;
541 cmd[1] = (ch->device->lun << 5) |
542 ch_elem_to_typecode(ch,elem);
543 cmd[2] = (elem >> 8) & 0xff;
544 cmd[3] = elem & 0xff;
545 cmd[5] = clear
546 ? (alternate ? 0x0d : 0x0c)
547 : (alternate ? 0x0b : 0x0a);
548
549 cmd[9] = 255;
550
551 memcpy(buffer,tag,32);
552 ch_check_voltag(buffer);
553
554 result = ch_do_scsi(ch, cmd, buffer, 256, DMA_TO_DEVICE);
555 kfree(buffer);
556 return result;
557}
558
fe08ac31 559static int ch_gstatus(scsi_changer *ch, int type, unsigned char __user *dest)
daa6eda6
GK		 560{
561 int retval = 0;
562 u_char data[16];
563 unsigned int i;
564
0b950672 565 mutex_lock(&ch->lock);
daa6eda6
GK		 566 for (i = 0; i < ch->counts[type]; i++) {
567 if (0 != ch_read_element_status
568 (ch, ch->firsts[type]+i,data)) {
569 retval = -EIO;
570 break;
571 }
572 put_user(data[2], dest+i);
573 if (data[2] & CESTATUS_EXCEPT)
574 vprintk("element 0x%x: asc=0x%x, ascq=0x%x\n",
575 ch->firsts[type]+i,
576 (int)data[4],(int)data[5]);
577 retval = ch_read_element_status
578 (ch, ch->firsts[type]+i,data);
579 if (0 != retval)
580 break;
581 }
0b950672 582 mutex_unlock(&ch->lock);
daa6eda6
GK		 583 return retval;
584}
585
586/* ------------------------------------------------------------------------ */
587
588static int
589ch_release(struct inode *inode, struct file *file)
590{
591 scsi_changer *ch = file->private_data;
592
593 scsi_device_put(ch->device);
594 file->private_data = NULL;
595 return 0;
596}
597
598static int
599ch_open(struct inode *inode, struct file *file)
600{
601 scsi_changer *tmp, *ch;
602 int minor = iminor(inode);
603
604 spin_lock(&ch_devlist_lock);
605 ch = NULL;
606 list_for_each_entry(tmp,&ch_devlist,list) {
607 if (tmp->minor == minor)
608 ch = tmp;
609 }
610 if (NULL == ch || scsi_device_get(ch->device)) {
611 spin_unlock(&ch_devlist_lock);
612 return -ENXIO;
613 }
614 spin_unlock(&ch_devlist_lock);
615
616 file->private_data = ch;
617 return 0;
618}
619
620static int
621ch_checkrange(scsi_changer *ch, unsigned int type, unsigned int unit)
622{
623 if (type >= CH_TYPES || unit >= ch->counts[type])
624 return -1;
625 return 0;
626}
627
f7fea185 628static long ch_ioctl(struct file *file,
daa6eda6
GK		 629 unsigned int cmd, unsigned long arg)
630{
631 scsi_changer *ch = file->private_data;
632 int retval;
fe08ac31 633 void __user *argp = (void __user *)arg;
daa6eda6
GK		 634
635 switch (cmd) {
636 case CHIOGPARAMS:
637 {
638 struct changer_params params;
639
640 params.cp_curpicker = 0;
641 params.cp_npickers = ch->counts[CHET_MT];
642 params.cp_nslots = ch->counts[CHET_ST];
643 params.cp_nportals = ch->counts[CHET_IE];
644 params.cp_ndrives = ch->counts[CHET_DT];
645
fe08ac31 646 if (copy_to_user(argp, &params, sizeof(params)))
daa6eda6
GK		 647 return -EFAULT;
648 return 0;
649 }
650 case CHIOGVPARAMS:
651 {
652 struct changer_vendor_params vparams;
653
654 memset(&vparams,0,sizeof(vparams));
655 if (ch->counts[CHET_V1]) {
656 vparams.cvp_n1 = ch->counts[CHET_V1];
657 strncpy(vparams.cvp_label1,vendor_labels[0],16);
658 }
659 if (ch->counts[CHET_V2]) {
660 vparams.cvp_n2 = ch->counts[CHET_V2];
661 strncpy(vparams.cvp_label2,vendor_labels[1],16);
662 }
663 if (ch->counts[CHET_V3]) {
664 vparams.cvp_n3 = ch->counts[CHET_V3];
665 strncpy(vparams.cvp_label3,vendor_labels[2],16);
666 }
667 if (ch->counts[CHET_V4]) {
668 vparams.cvp_n4 = ch->counts[CHET_V4];
669 strncpy(vparams.cvp_label4,vendor_labels[3],16);
670 }
fe08ac31 671 if (copy_to_user(argp, &vparams, sizeof(vparams)))
daa6eda6
GK		 672 return -EFAULT;
673 return 0;
674 }
675
676 case CHIOPOSITION:
677 {
678 struct changer_position pos;
679
fe08ac31 680 if (copy_from_user(&pos, argp, sizeof (pos)))
daa6eda6
GK		 681 return -EFAULT;
682
683 if (0 != ch_checkrange(ch, pos.cp_type, pos.cp_unit)) {
684 dprintk("CHIOPOSITION: invalid parameter\n");
685 return -EBADSLT;
686 }
0b950672 687 mutex_lock(&ch->lock);
daa6eda6
GK		 688 retval = ch_position(ch,0,
689 ch->firsts[pos.cp_type] + pos.cp_unit,
690 pos.cp_flags & CP_INVERT);
0b950672 691 mutex_unlock(&ch->lock);
daa6eda6
GK		 692 return retval;
693 }
694
695 case CHIOMOVE:
696 {
697 struct changer_move mv;
698
fe08ac31 699 if (copy_from_user(&mv, argp, sizeof (mv)))
daa6eda6
GK		 700 return -EFAULT;
701
702 if (0 != ch_checkrange(ch, mv.cm_fromtype, mv.cm_fromunit) ||
703 0 != ch_checkrange(ch, mv.cm_totype, mv.cm_tounit )) {
704 dprintk("CHIOMOVE: invalid parameter\n");
705 return -EBADSLT;
706 }
707
0b950672 708 mutex_lock(&ch->lock);
daa6eda6
GK		 709 retval = ch_move(ch,0,
710 ch->firsts[mv.cm_fromtype] + mv.cm_fromunit,
711 ch->firsts[mv.cm_totype] + mv.cm_tounit,
712 mv.cm_flags & CM_INVERT);
0b950672 713 mutex_unlock(&ch->lock);
daa6eda6
GK		 714 return retval;
715 }
716
717 case CHIOEXCHANGE:
718 {
719 struct changer_exchange mv;
720
fe08ac31 721 if (copy_from_user(&mv, argp, sizeof (mv)))
daa6eda6
GK		 722 return -EFAULT;
723
724 if (0 != ch_checkrange(ch, mv.ce_srctype, mv.ce_srcunit ) ||
725 0 != ch_checkrange(ch, mv.ce_fdsttype, mv.ce_fdstunit) ||
726 0 != ch_checkrange(ch, mv.ce_sdsttype, mv.ce_sdstunit)) {
727 dprintk("CHIOEXCHANGE: invalid parameter\n");
728 return -EBADSLT;
729 }
730
0b950672 731 mutex_lock(&ch->lock);
daa6eda6
GK		 732 retval = ch_exchange
733 (ch,0,
734 ch->firsts[mv.ce_srctype] + mv.ce_srcunit,
735 ch->firsts[mv.ce_fdsttype] + mv.ce_fdstunit,
736 ch->firsts[mv.ce_sdsttype] + mv.ce_sdstunit,
737 mv.ce_flags & CE_INVERT1, mv.ce_flags & CE_INVERT2);
0b950672 738 mutex_unlock(&ch->lock);
daa6eda6
GK		 739 return retval;
740 }
741
742 case CHIOGSTATUS:
743 {
744 struct changer_element_status ces;
745
fe08ac31 746 if (copy_from_user(&ces, argp, sizeof (ces)))
daa6eda6
GK		 747 return -EFAULT;
748 if (ces.ces_type < 0 || ces.ces_type >= CH_TYPES)
749 return -EINVAL;
750
751 return ch_gstatus(ch, ces.ces_type, ces.ces_data);
752 }
753
754 case CHIOGELEM:
755 {
756 struct changer_get_element cge;
757 u_char cmd[12];
758 u_char *buffer;
759 unsigned int elem;
760 int result,i;
761
fe08ac31 762 if (copy_from_user(&cge, argp, sizeof (cge)))
daa6eda6
GK		 763 return -EFAULT;
764
765 if (0 != ch_checkrange(ch, cge.cge_type, cge.cge_unit))
766 return -EINVAL;
767 elem = ch->firsts[cge.cge_type] + cge.cge_unit;
768
769 buffer = kmalloc(512, GFP_KERNEL | GFP_DMA);
770 if (!buffer)
771 return -ENOMEM;
0b950672 772 mutex_lock(&ch->lock);
daa6eda6
GK		 773
774 voltag_retry:
775 memset(cmd,0,sizeof(cmd));
776 cmd[0] = READ_ELEMENT_STATUS;
777 cmd[1] = (ch->device->lun << 5) |
778 (ch->voltags ? 0x10 : 0) |
779 ch_elem_to_typecode(ch,elem);
780 cmd[2] = (elem >> 8) & 0xff;
781 cmd[3] = elem & 0xff;
782 cmd[5] = 1;
783 cmd[9] = 255;
784
785 if (0 == (result = ch_do_scsi(ch, cmd, buffer, 256, DMA_FROM_DEVICE))) {
786 cge.cge_status = buffer[18];
787 cge.cge_flags = 0;
788 if (buffer[18] & CESTATUS_EXCEPT) {
789 cge.cge_errno = EIO;
790 }
791 if (buffer[25] & 0x80) {
792 cge.cge_flags |= CGE_SRC;
793 if (buffer[25] & 0x40)
794 cge.cge_flags |= CGE_INVERT;
795 elem = (buffer[26]<<8) | buffer[27];
796 for (i = 0; i < 4; i++) {
797 if (elem >= ch->firsts[i] &&
798 elem < ch->firsts[i] + ch->counts[i]) {
799 cge.cge_srctype = i;
800 cge.cge_srcunit = elem-ch->firsts[i];
801 }
802 }
803 }
804 if ((buffer[22] & 0x30) == 0x30) {
805 cge.cge_flags |= CGE_IDLUN;
806 cge.cge_id = buffer[23];
807 cge.cge_lun = buffer[22] & 7;
808 }
809 if (buffer[9] & 0x80) {
810 cge.cge_flags |= CGE_PVOLTAG;
811 memcpy(cge.cge_pvoltag,buffer+28,36);
812 }
813 if (buffer[9] & 0x40) {
814 cge.cge_flags |= CGE_AVOLTAG;
815 memcpy(cge.cge_avoltag,buffer+64,36);
816 }
817 } else if (ch->voltags) {
818 ch->voltags = 0;
819 vprintk("device has no volume tag support\n");
820 goto voltag_retry;
821 }
822 kfree(buffer);
0b950672 823 mutex_unlock(&ch->lock);
daa6eda6 824
fe08ac31 825 if (copy_to_user(argp, &cge, sizeof (cge)))
daa6eda6
GK		 826 return -EFAULT;
827 return result;
828 }
829
830 case CHIOINITELEM:
831 {
0b950672 832 mutex_lock(&ch->lock);
daa6eda6 833 retval = ch_init_elem(ch);
0b950672 834 mutex_unlock(&ch->lock);
daa6eda6
GK		 835 return retval;
836 }
837
838 case CHIOSVOLTAG:
839 {
840 struct changer_set_voltag csv;
841 int elem;
842
fe08ac31 843 if (copy_from_user(&csv, argp, sizeof(csv)))
daa6eda6
GK		 844 return -EFAULT;
845
846 if (0 != ch_checkrange(ch, csv.csv_type, csv.csv_unit)) {
847 dprintk("CHIOSVOLTAG: invalid parameter\n");
848 return -EBADSLT;
849 }
850 elem = ch->firsts[csv.csv_type] + csv.csv_unit;
0b950672 851 mutex_lock(&ch->lock);
daa6eda6
GK		 852 retval = ch_set_voltag(ch, elem,
853 csv.csv_flags & CSV_AVOLTAG,
854 csv.csv_flags & CSV_CLEARTAG,
855 csv.csv_voltag);
0b950672 856 mutex_unlock(&ch->lock);
daa6eda6
GK		 857 return retval;
858 }
859
860 default:
fe08ac31 861 return scsi_ioctl(ch->device, cmd, argp);
daa6eda6
GK		 862
863 }
864}
865
866#ifdef CONFIG_COMPAT
867
868struct changer_element_status32 {
869 int ces_type;
870 compat_uptr_t ces_data;
871};
872#define CHIOGSTATUS32 _IOW('c', 8,struct changer_element_status32)
873
874static long ch_ioctl_compat(struct file * file,
875 unsigned int cmd, unsigned long arg)
876{
877 scsi_changer *ch = file->private_data;
878
879 switch (cmd) {
880 case CHIOGPARAMS:
881 case CHIOGVPARAMS:
882 case CHIOPOSITION:
883 case CHIOMOVE:
884 case CHIOEXCHANGE:
885 case CHIOGELEM:
886 case CHIOINITELEM:
887 case CHIOSVOLTAG:
888 /* compatible */
f7fea185 889 return ch_ioctl(file, cmd, arg);
daa6eda6
GK		 890 case CHIOGSTATUS32:
891 {
892 struct changer_element_status32 ces32;
fe08ac31 893 unsigned char __user *data;
daa6eda6 894
fe08ac31 895 if (copy_from_user(&ces32, (void __user *)arg, sizeof (ces32)))
daa6eda6
GK		 896 return -EFAULT;
897 if (ces32.ces_type < 0 || ces32.ces_type >= CH_TYPES)
898 return -EINVAL;
899
900 data = compat_ptr(ces32.ces_data);
901 return ch_gstatus(ch, ces32.ces_type, data);
902 }
903 default:
904 // return scsi_ioctl_compat(ch->device, cmd, (void*)arg);
905 return -ENOIOCTLCMD;
906
907 }
908}
909#endif
910
911/* ------------------------------------------------------------------------ */
912
913static int ch_probe(struct device *dev)
914{
915 struct scsi_device *sd = to_scsi_device(dev);
916 scsi_changer *ch;
917
918 if (sd->type != TYPE_MEDIUM_CHANGER)
919 return -ENODEV;
920
4530a169 921 ch = kzalloc(sizeof(*ch), GFP_KERNEL);
daa6eda6
GK		 922 if (NULL == ch)
923 return -ENOMEM;
924
daa6eda6
GK		 925 ch->minor = ch_devcount;
926 sprintf(ch->name,"ch%d",ch->minor);
0b950672 927 mutex_init(&ch->lock);
daa6eda6
GK		 928 ch->device = sd;
929 ch_readconfig(ch);
930 if (init)
931 ch_init_elem(ch);
932
53f46542 933 class_device_create(ch_sysfs_class, NULL,
21feb5cc
GK		 934 MKDEV(SCSI_CHANGER_MAJOR,ch->minor),
935 dev, "s%s", ch->name);
daa6eda6 936
017560fc 937 sdev_printk(KERN_INFO, sd, "Attached scsi changer %s\n", ch->name);
daa6eda6
GK		 938
939 spin_lock(&ch_devlist_lock);
940 list_add_tail(&ch->list,&ch_devlist);
941 ch_devcount++;
942 spin_unlock(&ch_devlist_lock);
943 return 0;
944}
945
946static int ch_remove(struct device *dev)
947{
948 struct scsi_device *sd = to_scsi_device(dev);
949 scsi_changer *tmp, *ch;
950
951 spin_lock(&ch_devlist_lock);
952 ch = NULL;
953 list_for_each_entry(tmp,&ch_devlist,list) {
954 if (tmp->device == sd)
955 ch = tmp;
956 }
957 BUG_ON(NULL == ch);
958 list_del(&ch->list);
959 spin_unlock(&ch_devlist_lock);
960
21feb5cc
GK		 961 class_device_destroy(ch_sysfs_class,
962 MKDEV(SCSI_CHANGER_MAJOR,ch->minor));
daa6eda6
GK		 963 kfree(ch->dt);
964 kfree(ch);
965 ch_devcount--;
966 return 0;
967}
968
969static int __init init_ch_module(void)
970{
971 int rc;
972
973 printk(KERN_INFO "SCSI Media Changer driver v" VERSION " \n");
21feb5cc 974 ch_sysfs_class = class_create(THIS_MODULE, "scsi_changer");
daa6eda6
GK		 975 if (IS_ERR(ch_sysfs_class)) {
976 rc = PTR_ERR(ch_sysfs_class);
977 return rc;
978 }
979 rc = register_chrdev(SCSI_CHANGER_MAJOR,"ch",&changer_fops);
980 if (rc < 0) {
981 printk("Unable to get major %d for SCSI-Changer\n",
982 SCSI_CHANGER_MAJOR);
983 goto fail1;
984 }
985 rc = scsi_register_driver(&ch_template.gendrv);
986 if (rc < 0)
987 goto fail2;
988 return 0;
989
990 fail2:
991 unregister_chrdev(SCSI_CHANGER_MAJOR, "ch");
992 fail1:
21feb5cc 993 class_destroy(ch_sysfs_class);
daa6eda6
GK		 994 return rc;
995}
996
997static void __exit exit_ch_module(void)
998{
999 scsi_unregister_driver(&ch_template.gendrv);
1000 unregister_chrdev(SCSI_CHANGER_MAJOR, "ch");
21feb5cc 1001 class_destroy(ch_sysfs_class);
daa6eda6
GK		 1002}
1003
1004module_init(init_ch_module);
1005module_exit(exit_ch_module);
1006
1007/*
1008 * Local variables:
1009 * c-basic-offset: 8
1010 * End:
1011 */
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