blob: 4799d439120358395519b7c3def4dc0ff9575362 [file] [log] [blame]
Gerd Knorr daa6eda2005-05-10 10:59:13 +02001/*
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
Gerd Knorr daa6eda2005-05-10 10:59:13 +020010#include <linux/module.h>
11#include <linux/init.h>
12#include <linux/fs.h>
13#include <linux/kernel.h>
Gerd Knorr daa6eda2005-05-10 10:59:13 +020014#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>
Gerd Knorr daa6eda2005-05-10 10:59:13 +020021#include <linux/compat.h>
22#include <linux/chio.h> /* here are all the ioctls */
Arjan van de Ven0b950672006-01-11 13:16:10 +010023#include <linux/mutex.h>
FUJITA Tomonorida707c52008-01-24 17:24:50 +090024#include <linux/idr.h>
Jonathan Corbetb0061a02008-05-16 14:12:52 -060025#include <linux/smp_lock.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090026#include <linux/slab.h>
Gerd Knorr daa6eda2005-05-10 10:59:13 +020027
28#include <scsi/scsi.h>
29#include <scsi/scsi_cmnd.h>
30#include <scsi/scsi_driver.h>
31#include <scsi/scsi_ioctl.h>
32#include <scsi/scsi_host.h>
33#include <scsi/scsi_device.h>
James Bottomley84743bb2005-06-12 22:37:10 -050034#include <scsi/scsi_eh.h>
Gerd Knorr daa6eda2005-05-10 10:59:13 +020035#include <scsi/scsi_dbg.h>
36
37#define CH_DT_MAX 16
38#define CH_TYPES 8
FUJITA Tomonorida707c52008-01-24 17:24:50 +090039#define CH_MAX_DEVS 128
Gerd Knorr daa6eda2005-05-10 10:59:13 +020040
41MODULE_DESCRIPTION("device driver for scsi media changer devices");
42MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org>");
43MODULE_LICENSE("GPL");
Rene Hermanf018fa52006-03-08 00:14:20 -080044MODULE_ALIAS_CHARDEV_MAJOR(SCSI_CHANGER_MAJOR);
Scott James Remnant95f6c832009-03-10 16:19:44 +000045MODULE_ALIAS_SCSI_DEVICE(TYPE_MEDIUM_CHANGER);
Gerd Knorr daa6eda2005-05-10 10:59:13 +020046
47static int init = 1;
48module_param(init, int, 0444);
49MODULE_PARM_DESC(init, \
50 "initialize element status on driver load (default: on)");
51
52static int timeout_move = 300;
53module_param(timeout_move, int, 0644);
54MODULE_PARM_DESC(timeout_move,"timeout for move commands "
55 "(default: 300 seconds)");
56
57static int timeout_init = 3600;
58module_param(timeout_init, int, 0644);
59MODULE_PARM_DESC(timeout_init,"timeout for INITIALIZE ELEMENT STATUS "
60 "(default: 3600 seconds)");
61
62static int verbose = 1;
63module_param(verbose, int, 0644);
64MODULE_PARM_DESC(verbose,"be verbose (default: on)");
65
66static int debug = 0;
67module_param(debug, int, 0644);
68MODULE_PARM_DESC(debug,"enable/disable debug messages, also prints more "
69 "detailed sense codes on scsi errors (default: off)");
70
71static int dt_id[CH_DT_MAX] = { [ 0 ... (CH_DT_MAX-1) ] = -1 };
72static int dt_lun[CH_DT_MAX];
73module_param_array(dt_id, int, NULL, 0444);
74module_param_array(dt_lun, int, NULL, 0444);
75
76/* tell the driver about vendor-specific slots */
77static int vendor_firsts[CH_TYPES-4];
78static int vendor_counts[CH_TYPES-4];
79module_param_array(vendor_firsts, int, NULL, 0444);
80module_param_array(vendor_counts, int, NULL, 0444);
81
Arjan van de Ven0ad78202005-11-28 16:22:25 +010082static const char * vendor_labels[CH_TYPES-4] = {
Gerd Knorr daa6eda2005-05-10 10:59:13 +020083 "v0", "v1", "v2", "v3"
84};
85// module_param_string_array(vendor_labels, NULL, 0444);
86
87#define dprintk(fmt, arg...) if (debug) \
88 printk(KERN_DEBUG "%s: " fmt, ch->name , ## arg)
89#define vprintk(fmt, arg...) if (verbose) \
90 printk(KERN_INFO "%s: " fmt, ch->name , ## arg)
91
92/* ------------------------------------------------------------------- */
93
94#define MAX_RETRIES 1
95
Gerd Knorr 21feb5c2005-05-12 10:25:26 +020096static struct class * ch_sysfs_class;
Gerd Knorr daa6eda2005-05-10 10:59:13 +020097
98typedef struct {
99 struct list_head list;
100 int minor;
101 char name[8];
102 struct scsi_device *device;
103 struct scsi_device **dt; /* ptrs to data transfer elements */
104 u_int firsts[CH_TYPES];
105 u_int counts[CH_TYPES];
106 u_int unit_attention;
107 u_int voltags;
Arjan van de Ven0b950672006-01-11 13:16:10 +0100108 struct mutex lock;
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200109} scsi_changer;
110
FUJITA Tomonorida707c52008-01-24 17:24:50 +0900111static DEFINE_IDR(ch_index_idr);
112static DEFINE_SPINLOCK(ch_index_lock);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200113
Arjan van de Ven0ad78202005-11-28 16:22:25 +0100114static const struct {
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200115 unsigned char sense;
116 unsigned char asc;
117 unsigned char ascq;
118 int errno;
Harvey Harrisond70d4662008-03-31 22:05:30 -0700119} ch_err[] = {
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200120/* Just filled in what looks right. Hav'nt checked any standard paper for
121 these errno assignments, so they may be wrong... */
122 {
123 .sense = ILLEGAL_REQUEST,
124 .asc = 0x21,
125 .ascq = 0x01,
126 .errno = EBADSLT, /* Invalid element address */
127 },{
128 .sense = ILLEGAL_REQUEST,
129 .asc = 0x28,
130 .ascq = 0x01,
131 .errno = EBADE, /* Import or export element accessed */
132 },{
133 .sense = ILLEGAL_REQUEST,
134 .asc = 0x3B,
135 .ascq = 0x0D,
136 .errno = EXFULL, /* Medium destination element full */
137 },{
138 .sense = ILLEGAL_REQUEST,
139 .asc = 0x3B,
140 .ascq = 0x0E,
141 .errno = EBADE, /* Medium source element empty */
142 },{
143 .sense = ILLEGAL_REQUEST,
144 .asc = 0x20,
145 .ascq = 0x00,
146 .errno = EBADRQC, /* Invalid command operation code */
147 },{
148 /* end of list */
149 }
150};
151
152/* ------------------------------------------------------------------- */
153
James Bottomley84743bb2005-06-12 22:37:10 -0500154static int ch_find_errno(struct scsi_sense_hdr *sshdr)
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200155{
156 int i,errno = 0;
157
158 /* Check to see if additional sense information is available */
James Bottomley84743bb2005-06-12 22:37:10 -0500159 if (scsi_sense_valid(sshdr) &&
160 sshdr->asc != 0) {
Harvey Harrisond70d4662008-03-31 22:05:30 -0700161 for (i = 0; ch_err[i].errno != 0; i++) {
162 if (ch_err[i].sense == sshdr->sense_key &&
163 ch_err[i].asc == sshdr->asc &&
164 ch_err[i].ascq == sshdr->ascq) {
165 errno = -ch_err[i].errno;
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200166 break;
167 }
168 }
169 }
170 if (errno == 0)
171 errno = -EIO;
172 return errno;
173}
174
175static int
176ch_do_scsi(scsi_changer *ch, unsigned char *cmd,
177 void *buffer, unsigned buflength,
178 enum dma_data_direction direction)
179{
James Bottomley84743bb2005-06-12 22:37:10 -0500180 int errno, retries = 0, timeout, result;
181 struct scsi_sense_hdr sshdr;
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900182
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200183 timeout = (cmd[0] == INITIALIZE_ELEMENT_STATUS)
184 ? timeout_init : timeout_move;
185
186 retry:
187 errno = 0;
188 if (debug) {
189 dprintk("command: ");
190 __scsi_print_command(cmd);
191 }
192
James Bottomley84743bb2005-06-12 22:37:10 -0500193 result = scsi_execute_req(ch->device, cmd, direction, buffer,
194 buflength, &sshdr, timeout * HZ,
FUJITA Tomonorif4f4e472008-12-04 14:24:39 +0900195 MAX_RETRIES, NULL);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200196
James Bottomley84743bb2005-06-12 22:37:10 -0500197 dprintk("result: 0x%x\n",result);
198 if (driver_byte(result) & DRIVER_SENSE) {
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200199 if (debug)
James Bottomley84743bb2005-06-12 22:37:10 -0500200 scsi_print_sense_hdr(ch->name, &sshdr);
201 errno = ch_find_errno(&sshdr);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200202
James Bottomley84743bb2005-06-12 22:37:10 -0500203 switch(sshdr.sense_key) {
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200204 case UNIT_ATTENTION:
205 ch->unit_attention = 1;
206 if (retries++ < 3)
207 goto retry;
208 break;
209 }
210 }
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200211 return errno;
212}
213
214/* ------------------------------------------------------------------------ */
215
216static int
217ch_elem_to_typecode(scsi_changer *ch, u_int elem)
218{
219 int i;
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900220
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200221 for (i = 0; i < CH_TYPES; i++) {
222 if (elem >= ch->firsts[i] &&
223 elem < ch->firsts[i] +
224 ch->counts[i])
225 return i+1;
226 }
227 return 0;
228}
229
230static int
231ch_read_element_status(scsi_changer *ch, u_int elem, char *data)
232{
233 u_char cmd[12];
234 u_char *buffer;
235 int result;
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900236
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200237 buffer = kmalloc(512, GFP_KERNEL | GFP_DMA);
238 if(!buffer)
239 return -ENOMEM;
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900240
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200241 retry:
242 memset(cmd,0,sizeof(cmd));
243 cmd[0] = READ_ELEMENT_STATUS;
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900244 cmd[1] = (ch->device->lun << 5) |
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200245 (ch->voltags ? 0x10 : 0) |
246 ch_elem_to_typecode(ch,elem);
247 cmd[2] = (elem >> 8) & 0xff;
248 cmd[3] = elem & 0xff;
249 cmd[5] = 1;
250 cmd[9] = 255;
251 if (0 == (result = ch_do_scsi(ch, cmd, buffer, 256, DMA_FROM_DEVICE))) {
252 if (((buffer[16] << 8) | buffer[17]) != elem) {
253 dprintk("asked for element 0x%02x, got 0x%02x\n",
254 elem,(buffer[16] << 8) | buffer[17]);
255 kfree(buffer);
256 return -EIO;
257 }
258 memcpy(data,buffer+16,16);
259 } else {
260 if (ch->voltags) {
261 ch->voltags = 0;
262 vprintk("device has no volume tag support\n");
263 goto retry;
264 }
265 dprintk("READ ELEMENT STATUS for element 0x%x failed\n",elem);
266 }
267 kfree(buffer);
268 return result;
269}
270
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900271static int
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200272ch_init_elem(scsi_changer *ch)
273{
274 int err;
275 u_char cmd[6];
276
277 vprintk("INITIALIZE ELEMENT STATUS, may take some time ...\n");
278 memset(cmd,0,sizeof(cmd));
279 cmd[0] = INITIALIZE_ELEMENT_STATUS;
280 cmd[1] = ch->device->lun << 5;
281 err = ch_do_scsi(ch, cmd, NULL, 0, DMA_NONE);
282 vprintk("... finished\n");
283 return err;
284}
285
286static int
287ch_readconfig(scsi_changer *ch)
288{
289 u_char cmd[10], data[16];
290 u_char *buffer;
291 int result,id,lun,i;
292 u_int elem;
293
vignesh.babu@wipro.com4530a162007-04-16 11:35:33 +0530294 buffer = kzalloc(512, GFP_KERNEL | GFP_DMA);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200295 if (!buffer)
296 return -ENOMEM;
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900297
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200298 memset(cmd,0,sizeof(cmd));
299 cmd[0] = MODE_SENSE;
300 cmd[1] = ch->device->lun << 5;
301 cmd[2] = 0x1d;
302 cmd[4] = 255;
303 result = ch_do_scsi(ch, cmd, buffer, 255, DMA_FROM_DEVICE);
304 if (0 != result) {
305 cmd[1] |= (1<<3);
306 result = ch_do_scsi(ch, cmd, buffer, 255, DMA_FROM_DEVICE);
307 }
308 if (0 == result) {
309 ch->firsts[CHET_MT] =
310 (buffer[buffer[3]+ 6] << 8) | buffer[buffer[3]+ 7];
311 ch->counts[CHET_MT] =
312 (buffer[buffer[3]+ 8] << 8) | buffer[buffer[3]+ 9];
313 ch->firsts[CHET_ST] =
314 (buffer[buffer[3]+10] << 8) | buffer[buffer[3]+11];
315 ch->counts[CHET_ST] =
316 (buffer[buffer[3]+12] << 8) | buffer[buffer[3]+13];
317 ch->firsts[CHET_IE] =
318 (buffer[buffer[3]+14] << 8) | buffer[buffer[3]+15];
319 ch->counts[CHET_IE] =
320 (buffer[buffer[3]+16] << 8) | buffer[buffer[3]+17];
321 ch->firsts[CHET_DT] =
322 (buffer[buffer[3]+18] << 8) | buffer[buffer[3]+19];
323 ch->counts[CHET_DT] =
324 (buffer[buffer[3]+20] << 8) | buffer[buffer[3]+21];
325 vprintk("type #1 (mt): 0x%x+%d [medium transport]\n",
326 ch->firsts[CHET_MT],
327 ch->counts[CHET_MT]);
328 vprintk("type #2 (st): 0x%x+%d [storage]\n",
329 ch->firsts[CHET_ST],
330 ch->counts[CHET_ST]);
331 vprintk("type #3 (ie): 0x%x+%d [import/export]\n",
332 ch->firsts[CHET_IE],
333 ch->counts[CHET_IE]);
334 vprintk("type #4 (dt): 0x%x+%d [data transfer]\n",
335 ch->firsts[CHET_DT],
336 ch->counts[CHET_DT]);
337 } else {
338 vprintk("reading element address assigment page failed!\n");
339 }
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900340
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200341 /* vendor specific element types */
342 for (i = 0; i < 4; i++) {
343 if (0 == vendor_counts[i])
344 continue;
345 if (NULL == vendor_labels[i])
346 continue;
347 ch->firsts[CHET_V1+i] = vendor_firsts[i];
348 ch->counts[CHET_V1+i] = vendor_counts[i];
349 vprintk("type #%d (v%d): 0x%x+%d [%s, vendor specific]\n",
350 i+5,i+1,vendor_firsts[i],vendor_counts[i],
351 vendor_labels[i]);
352 }
353
354 /* look up the devices of the data transfer elements */
355 ch->dt = kmalloc(ch->counts[CHET_DT]*sizeof(struct scsi_device),
356 GFP_KERNEL);
Davidlohr Bueso Aa2cf8a62009-08-07 16:42:21 -0400357
358 if (!ch->dt) {
359 kfree(buffer);
360 return -ENOMEM;
361 }
362
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200363 for (elem = 0; elem < ch->counts[CHET_DT]; elem++) {
364 id = -1;
365 lun = 0;
366 if (elem < CH_DT_MAX && -1 != dt_id[elem]) {
367 id = dt_id[elem];
368 lun = dt_lun[elem];
369 vprintk("dt 0x%x: [insmod option] ",
370 elem+ch->firsts[CHET_DT]);
371 } else if (0 != ch_read_element_status
372 (ch,elem+ch->firsts[CHET_DT],data)) {
373 vprintk("dt 0x%x: READ ELEMENT STATUS failed\n",
374 elem+ch->firsts[CHET_DT]);
375 } else {
376 vprintk("dt 0x%x: ",elem+ch->firsts[CHET_DT]);
377 if (data[6] & 0x80) {
378 if (verbose)
379 printk("not this SCSI bus\n");
380 ch->dt[elem] = NULL;
381 } else if (0 == (data[6] & 0x30)) {
382 if (verbose)
383 printk("ID/LUN unknown\n");
384 ch->dt[elem] = NULL;
385 } else {
386 id = ch->device->id;
387 lun = 0;
388 if (data[6] & 0x20) id = data[7];
389 if (data[6] & 0x10) lun = data[6] & 7;
390 }
391 }
392 if (-1 != id) {
393 if (verbose)
394 printk("ID %i, LUN %i, ",id,lun);
395 ch->dt[elem] =
396 scsi_device_lookup(ch->device->host,
397 ch->device->channel,
398 id,lun);
399 if (!ch->dt[elem]) {
400 /* should not happen */
401 if (verbose)
402 printk("Huh? device not found!\n");
403 } else {
404 if (verbose)
405 printk("name: %8.8s %16.16s %4.4s\n",
406 ch->dt[elem]->vendor,
407 ch->dt[elem]->model,
408 ch->dt[elem]->rev);
409 }
410 }
411 }
412 ch->voltags = 1;
413 kfree(buffer);
414
415 return 0;
416}
417
418/* ------------------------------------------------------------------------ */
419
420static int
421ch_position(scsi_changer *ch, u_int trans, u_int elem, int rotate)
422{
423 u_char cmd[10];
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900424
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200425 dprintk("position: 0x%x\n",elem);
426 if (0 == trans)
427 trans = ch->firsts[CHET_MT];
428 memset(cmd,0,sizeof(cmd));
429 cmd[0] = POSITION_TO_ELEMENT;
430 cmd[1] = ch->device->lun << 5;
431 cmd[2] = (trans >> 8) & 0xff;
432 cmd[3] = trans & 0xff;
433 cmd[4] = (elem >> 8) & 0xff;
434 cmd[5] = elem & 0xff;
435 cmd[8] = rotate ? 1 : 0;
436 return ch_do_scsi(ch, cmd, NULL, 0, DMA_NONE);
437}
438
439static int
440ch_move(scsi_changer *ch, u_int trans, u_int src, u_int dest, int rotate)
441{
442 u_char cmd[12];
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900443
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200444 dprintk("move: 0x%x => 0x%x\n",src,dest);
445 if (0 == trans)
446 trans = ch->firsts[CHET_MT];
447 memset(cmd,0,sizeof(cmd));
448 cmd[0] = MOVE_MEDIUM;
449 cmd[1] = ch->device->lun << 5;
450 cmd[2] = (trans >> 8) & 0xff;
451 cmd[3] = trans & 0xff;
452 cmd[4] = (src >> 8) & 0xff;
453 cmd[5] = src & 0xff;
454 cmd[6] = (dest >> 8) & 0xff;
455 cmd[7] = dest & 0xff;
456 cmd[10] = rotate ? 1 : 0;
457 return ch_do_scsi(ch, cmd, NULL,0, DMA_NONE);
458}
459
460static int
461ch_exchange(scsi_changer *ch, u_int trans, u_int src,
462 u_int dest1, u_int dest2, int rotate1, int rotate2)
463{
464 u_char cmd[12];
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900465
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200466 dprintk("exchange: 0x%x => 0x%x => 0x%x\n",
467 src,dest1,dest2);
468 if (0 == trans)
469 trans = ch->firsts[CHET_MT];
470 memset(cmd,0,sizeof(cmd));
471 cmd[0] = EXCHANGE_MEDIUM;
472 cmd[1] = ch->device->lun << 5;
473 cmd[2] = (trans >> 8) & 0xff;
474 cmd[3] = trans & 0xff;
475 cmd[4] = (src >> 8) & 0xff;
476 cmd[5] = src & 0xff;
477 cmd[6] = (dest1 >> 8) & 0xff;
478 cmd[7] = dest1 & 0xff;
479 cmd[8] = (dest2 >> 8) & 0xff;
480 cmd[9] = dest2 & 0xff;
481 cmd[10] = (rotate1 ? 1 : 0) | (rotate2 ? 2 : 0);
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900482
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200483 return ch_do_scsi(ch, cmd, NULL,0, DMA_NONE);
484}
485
486static void
487ch_check_voltag(char *tag)
488{
489 int i;
490
491 for (i = 0; i < 32; i++) {
492 /* restrict to ascii */
493 if (tag[i] >= 0x7f || tag[i] < 0x20)
494 tag[i] = ' ';
495 /* don't allow search wildcards */
496 if (tag[i] == '?' ||
497 tag[i] == '*')
498 tag[i] = ' ';
499 }
500}
501
502static int
503ch_set_voltag(scsi_changer *ch, u_int elem,
504 int alternate, int clear, u_char *tag)
505{
506 u_char cmd[12];
507 u_char *buffer;
508 int result;
509
vignesh.babu@wipro.com4530a162007-04-16 11:35:33 +0530510 buffer = kzalloc(512, GFP_KERNEL);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200511 if (!buffer)
512 return -ENOMEM;
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200513
514 dprintk("%s %s voltag: 0x%x => \"%s\"\n",
515 clear ? "clear" : "set",
516 alternate ? "alternate" : "primary",
517 elem, tag);
518 memset(cmd,0,sizeof(cmd));
519 cmd[0] = SEND_VOLUME_TAG;
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900520 cmd[1] = (ch->device->lun << 5) |
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200521 ch_elem_to_typecode(ch,elem);
522 cmd[2] = (elem >> 8) & 0xff;
523 cmd[3] = elem & 0xff;
524 cmd[5] = clear
525 ? (alternate ? 0x0d : 0x0c)
526 : (alternate ? 0x0b : 0x0a);
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900527
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200528 cmd[9] = 255;
529
530 memcpy(buffer,tag,32);
531 ch_check_voltag(buffer);
532
533 result = ch_do_scsi(ch, cmd, buffer, 256, DMA_TO_DEVICE);
534 kfree(buffer);
535 return result;
536}
537
viro@ZenIV.linux.org.ukfe08ac32005-09-09 22:03:44 +0100538static int ch_gstatus(scsi_changer *ch, int type, unsigned char __user *dest)
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200539{
540 int retval = 0;
541 u_char data[16];
542 unsigned int i;
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900543
Arjan van de Ven0b950672006-01-11 13:16:10 +0100544 mutex_lock(&ch->lock);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200545 for (i = 0; i < ch->counts[type]; i++) {
546 if (0 != ch_read_element_status
547 (ch, ch->firsts[type]+i,data)) {
548 retval = -EIO;
549 break;
550 }
551 put_user(data[2], dest+i);
552 if (data[2] & CESTATUS_EXCEPT)
553 vprintk("element 0x%x: asc=0x%x, ascq=0x%x\n",
554 ch->firsts[type]+i,
555 (int)data[4],(int)data[5]);
556 retval = ch_read_element_status
557 (ch, ch->firsts[type]+i,data);
558 if (0 != retval)
559 break;
560 }
Arjan van de Ven0b950672006-01-11 13:16:10 +0100561 mutex_unlock(&ch->lock);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200562 return retval;
563}
564
565/* ------------------------------------------------------------------------ */
566
567static int
568ch_release(struct inode *inode, struct file *file)
569{
570 scsi_changer *ch = file->private_data;
571
572 scsi_device_put(ch->device);
573 file->private_data = NULL;
574 return 0;
575}
576
577static int
578ch_open(struct inode *inode, struct file *file)
579{
FUJITA Tomonorida707c52008-01-24 17:24:50 +0900580 scsi_changer *ch;
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200581 int minor = iminor(inode);
582
Jonathan Corbetb0061a02008-05-16 14:12:52 -0600583 lock_kernel();
FUJITA Tomonorida707c52008-01-24 17:24:50 +0900584 spin_lock(&ch_index_lock);
585 ch = idr_find(&ch_index_idr, minor);
586
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200587 if (NULL == ch || scsi_device_get(ch->device)) {
FUJITA Tomonorida707c52008-01-24 17:24:50 +0900588 spin_unlock(&ch_index_lock);
Jonathan Corbetb0061a02008-05-16 14:12:52 -0600589 unlock_kernel();
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200590 return -ENXIO;
591 }
FUJITA Tomonorida707c52008-01-24 17:24:50 +0900592 spin_unlock(&ch_index_lock);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200593
594 file->private_data = ch;
Jonathan Corbetb0061a02008-05-16 14:12:52 -0600595 unlock_kernel();
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200596 return 0;
597}
598
599static int
600ch_checkrange(scsi_changer *ch, unsigned int type, unsigned int unit)
601{
602 if (type >= CH_TYPES || unit >= ch->counts[type])
603 return -1;
604 return 0;
605}
606
Mathieu Segaudf7fea182008-01-14 15:43:18 +0100607static long ch_ioctl(struct file *file,
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200608 unsigned int cmd, unsigned long arg)
609{
610 scsi_changer *ch = file->private_data;
611 int retval;
viro@ZenIV.linux.org.ukfe08ac32005-09-09 22:03:44 +0100612 void __user *argp = (void __user *)arg;
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900613
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200614 switch (cmd) {
615 case CHIOGPARAMS:
616 {
617 struct changer_params params;
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900618
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200619 params.cp_curpicker = 0;
620 params.cp_npickers = ch->counts[CHET_MT];
621 params.cp_nslots = ch->counts[CHET_ST];
622 params.cp_nportals = ch->counts[CHET_IE];
623 params.cp_ndrives = ch->counts[CHET_DT];
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900624
viro@ZenIV.linux.org.ukfe08ac32005-09-09 22:03:44 +0100625 if (copy_to_user(argp, &params, sizeof(params)))
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200626 return -EFAULT;
627 return 0;
628 }
629 case CHIOGVPARAMS:
630 {
631 struct changer_vendor_params vparams;
632
633 memset(&vparams,0,sizeof(vparams));
634 if (ch->counts[CHET_V1]) {
635 vparams.cvp_n1 = ch->counts[CHET_V1];
636 strncpy(vparams.cvp_label1,vendor_labels[0],16);
637 }
638 if (ch->counts[CHET_V2]) {
639 vparams.cvp_n2 = ch->counts[CHET_V2];
640 strncpy(vparams.cvp_label2,vendor_labels[1],16);
641 }
642 if (ch->counts[CHET_V3]) {
643 vparams.cvp_n3 = ch->counts[CHET_V3];
644 strncpy(vparams.cvp_label3,vendor_labels[2],16);
645 }
646 if (ch->counts[CHET_V4]) {
647 vparams.cvp_n4 = ch->counts[CHET_V4];
648 strncpy(vparams.cvp_label4,vendor_labels[3],16);
649 }
viro@ZenIV.linux.org.ukfe08ac32005-09-09 22:03:44 +0100650 if (copy_to_user(argp, &vparams, sizeof(vparams)))
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200651 return -EFAULT;
652 return 0;
653 }
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900654
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200655 case CHIOPOSITION:
656 {
657 struct changer_position pos;
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900658
viro@ZenIV.linux.org.ukfe08ac32005-09-09 22:03:44 +0100659 if (copy_from_user(&pos, argp, sizeof (pos)))
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200660 return -EFAULT;
661
662 if (0 != ch_checkrange(ch, pos.cp_type, pos.cp_unit)) {
663 dprintk("CHIOPOSITION: invalid parameter\n");
664 return -EBADSLT;
665 }
Arjan van de Ven0b950672006-01-11 13:16:10 +0100666 mutex_lock(&ch->lock);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200667 retval = ch_position(ch,0,
668 ch->firsts[pos.cp_type] + pos.cp_unit,
669 pos.cp_flags & CP_INVERT);
Arjan van de Ven0b950672006-01-11 13:16:10 +0100670 mutex_unlock(&ch->lock);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200671 return retval;
672 }
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900673
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200674 case CHIOMOVE:
675 {
676 struct changer_move mv;
677
viro@ZenIV.linux.org.ukfe08ac32005-09-09 22:03:44 +0100678 if (copy_from_user(&mv, argp, sizeof (mv)))
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200679 return -EFAULT;
680
681 if (0 != ch_checkrange(ch, mv.cm_fromtype, mv.cm_fromunit) ||
682 0 != ch_checkrange(ch, mv.cm_totype, mv.cm_tounit )) {
683 dprintk("CHIOMOVE: invalid parameter\n");
684 return -EBADSLT;
685 }
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900686
Arjan van de Ven0b950672006-01-11 13:16:10 +0100687 mutex_lock(&ch->lock);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200688 retval = ch_move(ch,0,
689 ch->firsts[mv.cm_fromtype] + mv.cm_fromunit,
690 ch->firsts[mv.cm_totype] + mv.cm_tounit,
691 mv.cm_flags & CM_INVERT);
Arjan van de Ven0b950672006-01-11 13:16:10 +0100692 mutex_unlock(&ch->lock);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200693 return retval;
694 }
695
696 case CHIOEXCHANGE:
697 {
698 struct changer_exchange mv;
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900699
viro@ZenIV.linux.org.ukfe08ac32005-09-09 22:03:44 +0100700 if (copy_from_user(&mv, argp, sizeof (mv)))
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200701 return -EFAULT;
702
703 if (0 != ch_checkrange(ch, mv.ce_srctype, mv.ce_srcunit ) ||
704 0 != ch_checkrange(ch, mv.ce_fdsttype, mv.ce_fdstunit) ||
705 0 != ch_checkrange(ch, mv.ce_sdsttype, mv.ce_sdstunit)) {
706 dprintk("CHIOEXCHANGE: invalid parameter\n");
707 return -EBADSLT;
708 }
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900709
Arjan van de Ven0b950672006-01-11 13:16:10 +0100710 mutex_lock(&ch->lock);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200711 retval = ch_exchange
712 (ch,0,
713 ch->firsts[mv.ce_srctype] + mv.ce_srcunit,
714 ch->firsts[mv.ce_fdsttype] + mv.ce_fdstunit,
715 ch->firsts[mv.ce_sdsttype] + mv.ce_sdstunit,
716 mv.ce_flags & CE_INVERT1, mv.ce_flags & CE_INVERT2);
Arjan van de Ven0b950672006-01-11 13:16:10 +0100717 mutex_unlock(&ch->lock);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200718 return retval;
719 }
720
721 case CHIOGSTATUS:
722 {
723 struct changer_element_status ces;
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900724
viro@ZenIV.linux.org.ukfe08ac32005-09-09 22:03:44 +0100725 if (copy_from_user(&ces, argp, sizeof (ces)))
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200726 return -EFAULT;
727 if (ces.ces_type < 0 || ces.ces_type >= CH_TYPES)
728 return -EINVAL;
729
730 return ch_gstatus(ch, ces.ces_type, ces.ces_data);
731 }
732
733 case CHIOGELEM:
734 {
735 struct changer_get_element cge;
Harvey Harrisond70d4662008-03-31 22:05:30 -0700736 u_char ch_cmd[12];
737 u_char *buffer;
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200738 unsigned int elem;
739 int result,i;
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900740
viro@ZenIV.linux.org.ukfe08ac32005-09-09 22:03:44 +0100741 if (copy_from_user(&cge, argp, sizeof (cge)))
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200742 return -EFAULT;
743
744 if (0 != ch_checkrange(ch, cge.cge_type, cge.cge_unit))
745 return -EINVAL;
746 elem = ch->firsts[cge.cge_type] + cge.cge_unit;
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900747
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200748 buffer = kmalloc(512, GFP_KERNEL | GFP_DMA);
749 if (!buffer)
750 return -ENOMEM;
Arjan van de Ven0b950672006-01-11 13:16:10 +0100751 mutex_lock(&ch->lock);
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900752
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200753 voltag_retry:
Harvey Harrisond70d4662008-03-31 22:05:30 -0700754 memset(ch_cmd, 0, sizeof(ch_cmd));
755 ch_cmd[0] = READ_ELEMENT_STATUS;
756 ch_cmd[1] = (ch->device->lun << 5) |
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200757 (ch->voltags ? 0x10 : 0) |
758 ch_elem_to_typecode(ch,elem);
Harvey Harrisond70d4662008-03-31 22:05:30 -0700759 ch_cmd[2] = (elem >> 8) & 0xff;
760 ch_cmd[3] = elem & 0xff;
761 ch_cmd[5] = 1;
762 ch_cmd[9] = 255;
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900763
Harvey Harrisond70d4662008-03-31 22:05:30 -0700764 result = ch_do_scsi(ch, ch_cmd, buffer, 256, DMA_FROM_DEVICE);
765 if (!result) {
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200766 cge.cge_status = buffer[18];
767 cge.cge_flags = 0;
768 if (buffer[18] & CESTATUS_EXCEPT) {
769 cge.cge_errno = EIO;
770 }
771 if (buffer[25] & 0x80) {
772 cge.cge_flags |= CGE_SRC;
773 if (buffer[25] & 0x40)
774 cge.cge_flags |= CGE_INVERT;
775 elem = (buffer[26]<<8) | buffer[27];
776 for (i = 0; i < 4; i++) {
777 if (elem >= ch->firsts[i] &&
778 elem < ch->firsts[i] + ch->counts[i]) {
779 cge.cge_srctype = i;
780 cge.cge_srcunit = elem-ch->firsts[i];
781 }
782 }
783 }
784 if ((buffer[22] & 0x30) == 0x30) {
785 cge.cge_flags |= CGE_IDLUN;
786 cge.cge_id = buffer[23];
787 cge.cge_lun = buffer[22] & 7;
788 }
789 if (buffer[9] & 0x80) {
790 cge.cge_flags |= CGE_PVOLTAG;
791 memcpy(cge.cge_pvoltag,buffer+28,36);
792 }
793 if (buffer[9] & 0x40) {
794 cge.cge_flags |= CGE_AVOLTAG;
795 memcpy(cge.cge_avoltag,buffer+64,36);
796 }
797 } else if (ch->voltags) {
798 ch->voltags = 0;
799 vprintk("device has no volume tag support\n");
800 goto voltag_retry;
801 }
802 kfree(buffer);
Arjan van de Ven0b950672006-01-11 13:16:10 +0100803 mutex_unlock(&ch->lock);
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900804
viro@ZenIV.linux.org.ukfe08ac32005-09-09 22:03:44 +0100805 if (copy_to_user(argp, &cge, sizeof (cge)))
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200806 return -EFAULT;
807 return result;
808 }
809
810 case CHIOINITELEM:
811 {
Arjan van de Ven0b950672006-01-11 13:16:10 +0100812 mutex_lock(&ch->lock);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200813 retval = ch_init_elem(ch);
Arjan van de Ven0b950672006-01-11 13:16:10 +0100814 mutex_unlock(&ch->lock);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200815 return retval;
816 }
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900817
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200818 case CHIOSVOLTAG:
819 {
820 struct changer_set_voltag csv;
821 int elem;
822
viro@ZenIV.linux.org.ukfe08ac32005-09-09 22:03:44 +0100823 if (copy_from_user(&csv, argp, sizeof(csv)))
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200824 return -EFAULT;
825
826 if (0 != ch_checkrange(ch, csv.csv_type, csv.csv_unit)) {
827 dprintk("CHIOSVOLTAG: invalid parameter\n");
828 return -EBADSLT;
829 }
830 elem = ch->firsts[csv.csv_type] + csv.csv_unit;
Arjan van de Ven0b950672006-01-11 13:16:10 +0100831 mutex_lock(&ch->lock);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200832 retval = ch_set_voltag(ch, elem,
833 csv.csv_flags & CSV_AVOLTAG,
834 csv.csv_flags & CSV_CLEARTAG,
835 csv.csv_voltag);
Arjan van de Ven0b950672006-01-11 13:16:10 +0100836 mutex_unlock(&ch->lock);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200837 return retval;
838 }
839
840 default:
viro@ZenIV.linux.org.ukfe08ac32005-09-09 22:03:44 +0100841 return scsi_ioctl(ch->device, cmd, argp);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200842
843 }
844}
845
846#ifdef CONFIG_COMPAT
847
848struct changer_element_status32 {
849 int ces_type;
850 compat_uptr_t ces_data;
851};
852#define CHIOGSTATUS32 _IOW('c', 8,struct changer_element_status32)
853
854static long ch_ioctl_compat(struct file * file,
855 unsigned int cmd, unsigned long arg)
856{
857 scsi_changer *ch = file->private_data;
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900858
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200859 switch (cmd) {
860 case CHIOGPARAMS:
861 case CHIOGVPARAMS:
862 case CHIOPOSITION:
863 case CHIOMOVE:
864 case CHIOEXCHANGE:
865 case CHIOGELEM:
866 case CHIOINITELEM:
867 case CHIOSVOLTAG:
868 /* compatible */
Mathieu Segaudf7fea182008-01-14 15:43:18 +0100869 return ch_ioctl(file, cmd, arg);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200870 case CHIOGSTATUS32:
871 {
872 struct changer_element_status32 ces32;
viro@ZenIV.linux.org.ukfe08ac32005-09-09 22:03:44 +0100873 unsigned char __user *data;
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900874
viro@ZenIV.linux.org.ukfe08ac32005-09-09 22:03:44 +0100875 if (copy_from_user(&ces32, (void __user *)arg, sizeof (ces32)))
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200876 return -EFAULT;
877 if (ces32.ces_type < 0 || ces32.ces_type >= CH_TYPES)
878 return -EINVAL;
879
880 data = compat_ptr(ces32.ces_data);
881 return ch_gstatus(ch, ces32.ces_type, data);
882 }
883 default:
884 // return scsi_ioctl_compat(ch->device, cmd, (void*)arg);
885 return -ENOIOCTLCMD;
886
887 }
888}
889#endif
890
891/* ------------------------------------------------------------------------ */
892
893static int ch_probe(struct device *dev)
894{
895 struct scsi_device *sd = to_scsi_device(dev);
Tony Jonesee959b02008-02-22 00:13:36 +0100896 struct device *class_dev;
FUJITA Tomonorida707c52008-01-24 17:24:50 +0900897 int minor, ret = -ENOMEM;
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200898 scsi_changer *ch;
FUJITA Tomonoria3d2c2e2008-01-23 23:34:35 +0900899
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200900 if (sd->type != TYPE_MEDIUM_CHANGER)
901 return -ENODEV;
FUJITA Tomonoria3d2c2e2008-01-23 23:34:35 +0900902
vignesh.babu@wipro.com4530a162007-04-16 11:35:33 +0530903 ch = kzalloc(sizeof(*ch), GFP_KERNEL);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200904 if (NULL == ch)
905 return -ENOMEM;
906
FUJITA Tomonorida707c52008-01-24 17:24:50 +0900907 if (!idr_pre_get(&ch_index_idr, GFP_KERNEL))
908 goto free_ch;
909
910 spin_lock(&ch_index_lock);
911 ret = idr_get_new(&ch_index_idr, ch, &minor);
912 spin_unlock(&ch_index_lock);
913
914 if (ret)
915 goto free_ch;
916
917 if (minor > CH_MAX_DEVS) {
918 ret = -ENODEV;
919 goto remove_idr;
920 }
921
922 ch->minor = minor;
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200923 sprintf(ch->name,"ch%d",ch->minor);
FUJITA Tomonoria3d2c2e2008-01-23 23:34:35 +0900924
Greg Kroah-Hartmand73a1a62008-07-21 20:03:34 -0700925 class_dev = device_create(ch_sysfs_class, dev,
926 MKDEV(SCSI_CHANGER_MAJOR, ch->minor), ch,
927 "s%s", ch->name);
FUJITA Tomonoria3d2c2e2008-01-23 23:34:35 +0900928 if (IS_ERR(class_dev)) {
Tony Jonesee959b02008-02-22 00:13:36 +0100929 printk(KERN_WARNING "ch%d: device_create failed\n",
FUJITA Tomonoria3d2c2e2008-01-23 23:34:35 +0900930 ch->minor);
FUJITA Tomonorida707c52008-01-24 17:24:50 +0900931 ret = PTR_ERR(class_dev);
932 goto remove_idr;
FUJITA Tomonoria3d2c2e2008-01-23 23:34:35 +0900933 }
934
Arjan van de Ven0b950672006-01-11 13:16:10 +0100935 mutex_init(&ch->lock);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200936 ch->device = sd;
937 ch_readconfig(ch);
938 if (init)
939 ch_init_elem(ch);
940
FUJITA Tomonori3d164fb2008-07-26 23:25:43 +0900941 dev_set_drvdata(dev, ch);
Jeff Garzik017560f2005-10-24 18:04:36 -0400942 sdev_printk(KERN_INFO, sd, "Attached scsi changer %s\n", ch->name);
FUJITA Tomonoria3d2c2e2008-01-23 23:34:35 +0900943
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200944 return 0;
FUJITA Tomonorida707c52008-01-24 17:24:50 +0900945remove_idr:
946 idr_remove(&ch_index_idr, minor);
947free_ch:
948 kfree(ch);
949 return ret;
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200950}
951
952static int ch_remove(struct device *dev)
953{
FUJITA Tomonorida707c52008-01-24 17:24:50 +0900954 scsi_changer *ch = dev_get_drvdata(dev);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200955
FUJITA Tomonorida707c52008-01-24 17:24:50 +0900956 spin_lock(&ch_index_lock);
957 idr_remove(&ch_index_idr, ch->minor);
958 spin_unlock(&ch_index_lock);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200959
Tony Jonesee959b02008-02-22 00:13:36 +0100960 device_destroy(ch_sysfs_class, MKDEV(SCSI_CHANGER_MAJOR,ch->minor));
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200961 kfree(ch->dt);
962 kfree(ch);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200963 return 0;
964}
965
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900966static struct scsi_driver ch_template = {
967 .owner = THIS_MODULE,
968 .gendrv = {
969 .name = "ch",
970 .probe = ch_probe,
971 .remove = ch_remove,
972 },
973};
974
975static const struct file_operations changer_fops = {
976 .owner = THIS_MODULE,
977 .open = ch_open,
978 .release = ch_release,
979 .unlocked_ioctl = ch_ioctl,
980#ifdef CONFIG_COMPAT
981 .compat_ioctl = ch_ioctl_compat,
982#endif
983};
984
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200985static int __init init_ch_module(void)
986{
987 int rc;
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900988
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200989 printk(KERN_INFO "SCSI Media Changer driver v" VERSION " \n");
Gerd Knorr 21feb5c2005-05-12 10:25:26 +0200990 ch_sysfs_class = class_create(THIS_MODULE, "scsi_changer");
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200991 if (IS_ERR(ch_sysfs_class)) {
992 rc = PTR_ERR(ch_sysfs_class);
993 return rc;
994 }
995 rc = register_chrdev(SCSI_CHANGER_MAJOR,"ch",&changer_fops);
996 if (rc < 0) {
997 printk("Unable to get major %d for SCSI-Changer\n",
998 SCSI_CHANGER_MAJOR);
999 goto fail1;
1000 }
1001 rc = scsi_register_driver(&ch_template.gendrv);
1002 if (rc < 0)
1003 goto fail2;
1004 return 0;
1005
1006 fail2:
1007 unregister_chrdev(SCSI_CHANGER_MAJOR, "ch");
1008 fail1:
Gerd Knorr 21feb5c2005-05-12 10:25:26 +02001009 class_destroy(ch_sysfs_class);
Gerd Knorr daa6eda2005-05-10 10:59:13 +02001010 return rc;
1011}
1012
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +09001013static void __exit exit_ch_module(void)
Gerd Knorr daa6eda2005-05-10 10:59:13 +02001014{
1015 scsi_unregister_driver(&ch_template.gendrv);
1016 unregister_chrdev(SCSI_CHANGER_MAJOR, "ch");
Gerd Knorr 21feb5c2005-05-12 10:25:26 +02001017 class_destroy(ch_sysfs_class);
FUJITA Tomonorida707c52008-01-24 17:24:50 +09001018 idr_destroy(&ch_index_idr);
Gerd Knorr daa6eda2005-05-10 10:59:13 +02001019}
1020
1021module_init(init_ch_module);
1022module_exit(exit_ch_module);
1023
1024/*
1025 * Local variables:
1026 * c-basic-offset: 8
1027 * End:
1028 */