blob: dad959fcf6d8e2513369437e1bbd175f582daaad [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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090025#include <linux/slab.h>
Gerd Knorr daa6eda2005-05-10 10:59:13 +020026
27#include <scsi/scsi.h>
28#include <scsi/scsi_cmnd.h>
29#include <scsi/scsi_driver.h>
30#include <scsi/scsi_ioctl.h>
31#include <scsi/scsi_host.h>
32#include <scsi/scsi_device.h>
James Bottomley84743bb2005-06-12 22:37:10 -050033#include <scsi/scsi_eh.h>
Gerd Knorr daa6eda2005-05-10 10:59:13 +020034#include <scsi/scsi_dbg.h>
35
36#define CH_DT_MAX 16
37#define CH_TYPES 8
FUJITA Tomonorida707c52008-01-24 17:24:50 +090038#define CH_MAX_DEVS 128
Gerd Knorr daa6eda2005-05-10 10:59:13 +020039
40MODULE_DESCRIPTION("device driver for scsi media changer devices");
41MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org>");
42MODULE_LICENSE("GPL");
Rene Hermanf018fa52006-03-08 00:14:20 -080043MODULE_ALIAS_CHARDEV_MAJOR(SCSI_CHANGER_MAJOR);
Scott James Remnant95f6c832009-03-10 16:19:44 +000044MODULE_ALIAS_SCSI_DEVICE(TYPE_MEDIUM_CHANGER);
Gerd Knorr daa6eda2005-05-10 10:59:13 +020045
Arnd Bergmannc45d15d2010-06-02 14:28:52 +020046static DEFINE_MUTEX(ch_mutex);
Gerd Knorr daa6eda2005-05-10 10:59:13 +020047static 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
Hannes Reinecke28c31722014-06-25 16:39:56 +020087#define ch_printk(prefix, ch, fmt, a...) \
Hannes Reinecke22e0d992014-10-24 14:26:44 +020088 sdev_prefix_printk(prefix, (ch)->device, (ch)->name, fmt, ##a)
Hannes Reinecke28c31722014-06-25 16:39:56 +020089
Joe Perches87da3232010-08-10 18:01:22 -070090#define DPRINTK(fmt, arg...) \
91do { \
92 if (debug) \
Hannes Reinecke28c31722014-06-25 16:39:56 +020093 ch_printk(KERN_DEBUG, ch, fmt, ##arg); \
Joe Perches87da3232010-08-10 18:01:22 -070094} while (0)
95#define VPRINTK(level, fmt, arg...) \
96do { \
97 if (verbose) \
Hannes Reinecke28c31722014-06-25 16:39:56 +020098 ch_printk(level, ch, fmt, ##arg); \
Joe Perches87da3232010-08-10 18:01:22 -070099} while (0)
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200100
101/* ------------------------------------------------------------------- */
102
103#define MAX_RETRIES 1
104
Gerd Knorr 21feb5c2005-05-12 10:25:26 +0200105static struct class * ch_sysfs_class;
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200106
107typedef struct {
108 struct list_head list;
109 int minor;
110 char name[8];
111 struct scsi_device *device;
112 struct scsi_device **dt; /* ptrs to data transfer elements */
113 u_int firsts[CH_TYPES];
114 u_int counts[CH_TYPES];
115 u_int unit_attention;
116 u_int voltags;
Arjan van de Ven0b950672006-01-11 13:16:10 +0100117 struct mutex lock;
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200118} scsi_changer;
119
FUJITA Tomonorida707c52008-01-24 17:24:50 +0900120static DEFINE_IDR(ch_index_idr);
121static DEFINE_SPINLOCK(ch_index_lock);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200122
Arjan van de Ven0ad78202005-11-28 16:22:25 +0100123static const struct {
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200124 unsigned char sense;
125 unsigned char asc;
126 unsigned char ascq;
127 int errno;
Harvey Harrisond70d4662008-03-31 22:05:30 -0700128} ch_err[] = {
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200129/* Just filled in what looks right. Hav'nt checked any standard paper for
130 these errno assignments, so they may be wrong... */
131 {
132 .sense = ILLEGAL_REQUEST,
133 .asc = 0x21,
134 .ascq = 0x01,
135 .errno = EBADSLT, /* Invalid element address */
136 },{
137 .sense = ILLEGAL_REQUEST,
138 .asc = 0x28,
139 .ascq = 0x01,
140 .errno = EBADE, /* Import or export element accessed */
141 },{
142 .sense = ILLEGAL_REQUEST,
143 .asc = 0x3B,
144 .ascq = 0x0D,
145 .errno = EXFULL, /* Medium destination element full */
146 },{
147 .sense = ILLEGAL_REQUEST,
148 .asc = 0x3B,
149 .ascq = 0x0E,
150 .errno = EBADE, /* Medium source element empty */
151 },{
152 .sense = ILLEGAL_REQUEST,
153 .asc = 0x20,
154 .ascq = 0x00,
155 .errno = EBADRQC, /* Invalid command operation code */
156 },{
157 /* end of list */
158 }
159};
160
161/* ------------------------------------------------------------------- */
162
James Bottomley84743bb2005-06-12 22:37:10 -0500163static int ch_find_errno(struct scsi_sense_hdr *sshdr)
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200164{
165 int i,errno = 0;
166
167 /* Check to see if additional sense information is available */
James Bottomley84743bb2005-06-12 22:37:10 -0500168 if (scsi_sense_valid(sshdr) &&
169 sshdr->asc != 0) {
Harvey Harrisond70d4662008-03-31 22:05:30 -0700170 for (i = 0; ch_err[i].errno != 0; i++) {
171 if (ch_err[i].sense == sshdr->sense_key &&
172 ch_err[i].asc == sshdr->asc &&
173 ch_err[i].ascq == sshdr->ascq) {
174 errno = -ch_err[i].errno;
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200175 break;
176 }
177 }
178 }
179 if (errno == 0)
180 errno = -EIO;
181 return errno;
182}
183
184static int
Hannes Reineckea9a47bf2014-10-24 14:26:57 +0200185ch_do_scsi(scsi_changer *ch, unsigned char *cmd, int cmd_len,
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200186 void *buffer, unsigned buflength,
187 enum dma_data_direction direction)
188{
James Bottomley84743bb2005-06-12 22:37:10 -0500189 int errno, retries = 0, timeout, result;
190 struct scsi_sense_hdr sshdr;
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900191
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200192 timeout = (cmd[0] == INITIALIZE_ELEMENT_STATUS)
193 ? timeout_init : timeout_move;
194
195 retry:
196 errno = 0;
Hannes Reinecke28c31722014-06-25 16:39:56 +0200197 result = scsi_execute_req(ch->device, cmd, direction, buffer,
James Bottomley84743bb2005-06-12 22:37:10 -0500198 buflength, &sshdr, timeout * HZ,
FUJITA Tomonorif4f4e472008-12-04 14:24:39 +0900199 MAX_RETRIES, NULL);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200200
James Bottomley84743bb2005-06-12 22:37:10 -0500201 if (driver_byte(result) & DRIVER_SENSE) {
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200202 if (debug)
Hannes Reinecked811b842014-10-24 14:26:45 +0200203 scsi_print_sense_hdr(ch->device, ch->name, &sshdr);
James Bottomley84743bb2005-06-12 22:37:10 -0500204 errno = ch_find_errno(&sshdr);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200205
James Bottomley84743bb2005-06-12 22:37:10 -0500206 switch(sshdr.sense_key) {
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200207 case UNIT_ATTENTION:
208 ch->unit_attention = 1;
209 if (retries++ < 3)
210 goto retry;
211 break;
212 }
213 }
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200214 return errno;
215}
216
217/* ------------------------------------------------------------------------ */
218
219static int
220ch_elem_to_typecode(scsi_changer *ch, u_int elem)
221{
222 int i;
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900223
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200224 for (i = 0; i < CH_TYPES; i++) {
225 if (elem >= ch->firsts[i] &&
226 elem < ch->firsts[i] +
227 ch->counts[i])
228 return i+1;
229 }
230 return 0;
231}
232
233static int
234ch_read_element_status(scsi_changer *ch, u_int elem, char *data)
235{
236 u_char cmd[12];
237 u_char *buffer;
238 int result;
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900239
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200240 buffer = kmalloc(512, GFP_KERNEL | GFP_DMA);
241 if(!buffer)
242 return -ENOMEM;
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900243
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200244 retry:
245 memset(cmd,0,sizeof(cmd));
246 cmd[0] = READ_ELEMENT_STATUS;
Hannes Reinecke9cb78c12014-06-25 15:27:36 +0200247 cmd[1] = ((ch->device->lun & 0x7) << 5) |
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200248 (ch->voltags ? 0x10 : 0) |
249 ch_elem_to_typecode(ch,elem);
250 cmd[2] = (elem >> 8) & 0xff;
251 cmd[3] = elem & 0xff;
252 cmd[5] = 1;
253 cmd[9] = 255;
Hannes Reineckea9a47bf2014-10-24 14:26:57 +0200254 if (0 == (result = ch_do_scsi(ch, cmd, 12,
255 buffer, 256, DMA_FROM_DEVICE))) {
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200256 if (((buffer[16] << 8) | buffer[17]) != elem) {
Joe Perches87da3232010-08-10 18:01:22 -0700257 DPRINTK("asked for element 0x%02x, got 0x%02x\n",
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200258 elem,(buffer[16] << 8) | buffer[17]);
259 kfree(buffer);
260 return -EIO;
261 }
262 memcpy(data,buffer+16,16);
263 } else {
264 if (ch->voltags) {
265 ch->voltags = 0;
Joe Perches87da3232010-08-10 18:01:22 -0700266 VPRINTK(KERN_INFO, "device has no volume tag support\n");
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200267 goto retry;
268 }
Joe Perches87da3232010-08-10 18:01:22 -0700269 DPRINTK("READ ELEMENT STATUS for element 0x%x failed\n",elem);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200270 }
271 kfree(buffer);
272 return result;
273}
274
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900275static int
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200276ch_init_elem(scsi_changer *ch)
277{
278 int err;
279 u_char cmd[6];
280
Joe Perches87da3232010-08-10 18:01:22 -0700281 VPRINTK(KERN_INFO, "INITIALIZE ELEMENT STATUS, may take some time ...\n");
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200282 memset(cmd,0,sizeof(cmd));
283 cmd[0] = INITIALIZE_ELEMENT_STATUS;
Hannes Reinecke9cb78c12014-06-25 15:27:36 +0200284 cmd[1] = (ch->device->lun & 0x7) << 5;
Hannes Reineckea9a47bf2014-10-24 14:26:57 +0200285 err = ch_do_scsi(ch, cmd, 6, NULL, 0, DMA_NONE);
Joe Perches87da3232010-08-10 18:01:22 -0700286 VPRINTK(KERN_INFO, "... finished\n");
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200287 return err;
288}
289
290static int
291ch_readconfig(scsi_changer *ch)
292{
293 u_char cmd[10], data[16];
294 u_char *buffer;
295 int result,id,lun,i;
296 u_int elem;
297
vignesh.babu@wipro.com4530a162007-04-16 11:35:33 +0530298 buffer = kzalloc(512, GFP_KERNEL | GFP_DMA);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200299 if (!buffer)
300 return -ENOMEM;
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900301
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200302 memset(cmd,0,sizeof(cmd));
303 cmd[0] = MODE_SENSE;
Hannes Reinecke9cb78c12014-06-25 15:27:36 +0200304 cmd[1] = (ch->device->lun & 0x7) << 5;
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200305 cmd[2] = 0x1d;
306 cmd[4] = 255;
Hannes Reineckea9a47bf2014-10-24 14:26:57 +0200307 result = ch_do_scsi(ch, cmd, 10, buffer, 255, DMA_FROM_DEVICE);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200308 if (0 != result) {
309 cmd[1] |= (1<<3);
Hannes Reineckea9a47bf2014-10-24 14:26:57 +0200310 result = ch_do_scsi(ch, cmd, 10, buffer, 255, DMA_FROM_DEVICE);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200311 }
312 if (0 == result) {
313 ch->firsts[CHET_MT] =
314 (buffer[buffer[3]+ 6] << 8) | buffer[buffer[3]+ 7];
315 ch->counts[CHET_MT] =
316 (buffer[buffer[3]+ 8] << 8) | buffer[buffer[3]+ 9];
317 ch->firsts[CHET_ST] =
318 (buffer[buffer[3]+10] << 8) | buffer[buffer[3]+11];
319 ch->counts[CHET_ST] =
320 (buffer[buffer[3]+12] << 8) | buffer[buffer[3]+13];
321 ch->firsts[CHET_IE] =
322 (buffer[buffer[3]+14] << 8) | buffer[buffer[3]+15];
323 ch->counts[CHET_IE] =
324 (buffer[buffer[3]+16] << 8) | buffer[buffer[3]+17];
325 ch->firsts[CHET_DT] =
326 (buffer[buffer[3]+18] << 8) | buffer[buffer[3]+19];
327 ch->counts[CHET_DT] =
328 (buffer[buffer[3]+20] << 8) | buffer[buffer[3]+21];
Joe Perches87da3232010-08-10 18:01:22 -0700329 VPRINTK(KERN_INFO, "type #1 (mt): 0x%x+%d [medium transport]\n",
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200330 ch->firsts[CHET_MT],
331 ch->counts[CHET_MT]);
Joe Perches87da3232010-08-10 18:01:22 -0700332 VPRINTK(KERN_INFO, "type #2 (st): 0x%x+%d [storage]\n",
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200333 ch->firsts[CHET_ST],
334 ch->counts[CHET_ST]);
Joe Perches87da3232010-08-10 18:01:22 -0700335 VPRINTK(KERN_INFO, "type #3 (ie): 0x%x+%d [import/export]\n",
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200336 ch->firsts[CHET_IE],
337 ch->counts[CHET_IE]);
Joe Perches87da3232010-08-10 18:01:22 -0700338 VPRINTK(KERN_INFO, "type #4 (dt): 0x%x+%d [data transfer]\n",
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200339 ch->firsts[CHET_DT],
340 ch->counts[CHET_DT]);
341 } else {
Masanari Iidaf42cf8d2015-02-24 23:11:26 +0900342 VPRINTK(KERN_INFO, "reading element address assignment page failed!\n");
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200343 }
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900344
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200345 /* vendor specific element types */
346 for (i = 0; i < 4; i++) {
347 if (0 == vendor_counts[i])
348 continue;
349 if (NULL == vendor_labels[i])
350 continue;
351 ch->firsts[CHET_V1+i] = vendor_firsts[i];
352 ch->counts[CHET_V1+i] = vendor_counts[i];
Joe Perches87da3232010-08-10 18:01:22 -0700353 VPRINTK(KERN_INFO, "type #%d (v%d): 0x%x+%d [%s, vendor specific]\n",
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200354 i+5,i+1,vendor_firsts[i],vendor_counts[i],
355 vendor_labels[i]);
356 }
357
358 /* look up the devices of the data transfer elements */
Julia Lawall85bc0812010-08-10 18:01:18 -0700359 ch->dt = kcalloc(ch->counts[CHET_DT], sizeof(*ch->dt),
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200360 GFP_KERNEL);
Davidlohr Bueso Aa2cf8a632009-08-07 16:42:21 -0400361
362 if (!ch->dt) {
363 kfree(buffer);
364 return -ENOMEM;
365 }
366
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200367 for (elem = 0; elem < ch->counts[CHET_DT]; elem++) {
368 id = -1;
369 lun = 0;
370 if (elem < CH_DT_MAX && -1 != dt_id[elem]) {
371 id = dt_id[elem];
372 lun = dt_lun[elem];
Joe Perches87da3232010-08-10 18:01:22 -0700373 VPRINTK(KERN_INFO, "dt 0x%x: [insmod option] ",
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200374 elem+ch->firsts[CHET_DT]);
375 } else if (0 != ch_read_element_status
376 (ch,elem+ch->firsts[CHET_DT],data)) {
Joe Perches87da3232010-08-10 18:01:22 -0700377 VPRINTK(KERN_INFO, "dt 0x%x: READ ELEMENT STATUS failed\n",
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200378 elem+ch->firsts[CHET_DT]);
379 } else {
Joe Perches87da3232010-08-10 18:01:22 -0700380 VPRINTK(KERN_INFO, "dt 0x%x: ",elem+ch->firsts[CHET_DT]);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200381 if (data[6] & 0x80) {
Joe Perches87da3232010-08-10 18:01:22 -0700382 VPRINTK(KERN_CONT, "not this SCSI bus\n");
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200383 ch->dt[elem] = NULL;
384 } else if (0 == (data[6] & 0x30)) {
Joe Perches87da3232010-08-10 18:01:22 -0700385 VPRINTK(KERN_CONT, "ID/LUN unknown\n");
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200386 ch->dt[elem] = NULL;
387 } else {
388 id = ch->device->id;
389 lun = 0;
390 if (data[6] & 0x20) id = data[7];
391 if (data[6] & 0x10) lun = data[6] & 7;
392 }
393 }
394 if (-1 != id) {
Joe Perches87da3232010-08-10 18:01:22 -0700395 VPRINTK(KERN_CONT, "ID %i, LUN %i, ",id,lun);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200396 ch->dt[elem] =
397 scsi_device_lookup(ch->device->host,
398 ch->device->channel,
399 id,lun);
400 if (!ch->dt[elem]) {
401 /* should not happen */
Joe Perches87da3232010-08-10 18:01:22 -0700402 VPRINTK(KERN_CONT, "Huh? device not found!\n");
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200403 } else {
Joe Perches87da3232010-08-10 18:01:22 -0700404 VPRINTK(KERN_CONT, "name: %8.8s %16.16s %4.4s\n",
405 ch->dt[elem]->vendor,
406 ch->dt[elem]->model,
407 ch->dt[elem]->rev);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200408 }
409 }
410 }
411 ch->voltags = 1;
412 kfree(buffer);
413
414 return 0;
415}
416
417/* ------------------------------------------------------------------------ */
418
419static int
420ch_position(scsi_changer *ch, u_int trans, u_int elem, int rotate)
421{
422 u_char cmd[10];
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900423
Joe Perches87da3232010-08-10 18:01:22 -0700424 DPRINTK("position: 0x%x\n",elem);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200425 if (0 == trans)
426 trans = ch->firsts[CHET_MT];
427 memset(cmd,0,sizeof(cmd));
428 cmd[0] = POSITION_TO_ELEMENT;
Hannes Reinecke9cb78c12014-06-25 15:27:36 +0200429 cmd[1] = (ch->device->lun & 0x7) << 5;
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200430 cmd[2] = (trans >> 8) & 0xff;
431 cmd[3] = trans & 0xff;
432 cmd[4] = (elem >> 8) & 0xff;
433 cmd[5] = elem & 0xff;
434 cmd[8] = rotate ? 1 : 0;
Hannes Reineckea9a47bf2014-10-24 14:26:57 +0200435 return ch_do_scsi(ch, cmd, 10, NULL, 0, DMA_NONE);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200436}
437
438static int
439ch_move(scsi_changer *ch, u_int trans, u_int src, u_int dest, int rotate)
440{
441 u_char cmd[12];
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900442
Joe Perches87da3232010-08-10 18:01:22 -0700443 DPRINTK("move: 0x%x => 0x%x\n",src,dest);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200444 if (0 == trans)
445 trans = ch->firsts[CHET_MT];
446 memset(cmd,0,sizeof(cmd));
447 cmd[0] = MOVE_MEDIUM;
Hannes Reinecke9cb78c12014-06-25 15:27:36 +0200448 cmd[1] = (ch->device->lun & 0x7) << 5;
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200449 cmd[2] = (trans >> 8) & 0xff;
450 cmd[3] = trans & 0xff;
451 cmd[4] = (src >> 8) & 0xff;
452 cmd[5] = src & 0xff;
453 cmd[6] = (dest >> 8) & 0xff;
454 cmd[7] = dest & 0xff;
455 cmd[10] = rotate ? 1 : 0;
Hannes Reineckea9a47bf2014-10-24 14:26:57 +0200456 return ch_do_scsi(ch, cmd, 12, NULL,0, DMA_NONE);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200457}
458
459static int
460ch_exchange(scsi_changer *ch, u_int trans, u_int src,
461 u_int dest1, u_int dest2, int rotate1, int rotate2)
462{
463 u_char cmd[12];
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900464
Joe Perches87da3232010-08-10 18:01:22 -0700465 DPRINTK("exchange: 0x%x => 0x%x => 0x%x\n",
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200466 src,dest1,dest2);
467 if (0 == trans)
468 trans = ch->firsts[CHET_MT];
469 memset(cmd,0,sizeof(cmd));
470 cmd[0] = EXCHANGE_MEDIUM;
Hannes Reinecke9cb78c12014-06-25 15:27:36 +0200471 cmd[1] = (ch->device->lun & 0x7) << 5;
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200472 cmd[2] = (trans >> 8) & 0xff;
473 cmd[3] = trans & 0xff;
474 cmd[4] = (src >> 8) & 0xff;
475 cmd[5] = src & 0xff;
476 cmd[6] = (dest1 >> 8) & 0xff;
477 cmd[7] = dest1 & 0xff;
478 cmd[8] = (dest2 >> 8) & 0xff;
479 cmd[9] = dest2 & 0xff;
480 cmd[10] = (rotate1 ? 1 : 0) | (rotate2 ? 2 : 0);
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900481
Hannes Reineckea9a47bf2014-10-24 14:26:57 +0200482 return ch_do_scsi(ch, cmd, 12, NULL, 0, DMA_NONE);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200483}
484
485static void
486ch_check_voltag(char *tag)
487{
488 int i;
489
490 for (i = 0; i < 32; i++) {
491 /* restrict to ascii */
492 if (tag[i] >= 0x7f || tag[i] < 0x20)
493 tag[i] = ' ';
494 /* don't allow search wildcards */
495 if (tag[i] == '?' ||
496 tag[i] == '*')
497 tag[i] = ' ';
498 }
499}
500
501static int
502ch_set_voltag(scsi_changer *ch, u_int elem,
503 int alternate, int clear, u_char *tag)
504{
505 u_char cmd[12];
506 u_char *buffer;
507 int result;
508
vignesh.babu@wipro.com4530a162007-04-16 11:35:33 +0530509 buffer = kzalloc(512, GFP_KERNEL);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200510 if (!buffer)
511 return -ENOMEM;
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200512
Joe Perches87da3232010-08-10 18:01:22 -0700513 DPRINTK("%s %s voltag: 0x%x => \"%s\"\n",
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200514 clear ? "clear" : "set",
515 alternate ? "alternate" : "primary",
516 elem, tag);
517 memset(cmd,0,sizeof(cmd));
518 cmd[0] = SEND_VOLUME_TAG;
Hannes Reinecke9cb78c12014-06-25 15:27:36 +0200519 cmd[1] = ((ch->device->lun & 0x7) << 5) |
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200520 ch_elem_to_typecode(ch,elem);
521 cmd[2] = (elem >> 8) & 0xff;
522 cmd[3] = elem & 0xff;
523 cmd[5] = clear
524 ? (alternate ? 0x0d : 0x0c)
525 : (alternate ? 0x0b : 0x0a);
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900526
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200527 cmd[9] = 255;
528
529 memcpy(buffer,tag,32);
530 ch_check_voltag(buffer);
531
Hannes Reineckea9a47bf2014-10-24 14:26:57 +0200532 result = ch_do_scsi(ch, cmd, 12, buffer, 256, DMA_TO_DEVICE);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200533 kfree(buffer);
534 return result;
535}
536
viro@ZenIV.linux.org.ukfe08ac32005-09-09 22:03:44 +0100537static int ch_gstatus(scsi_changer *ch, int type, unsigned char __user *dest)
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200538{
539 int retval = 0;
540 u_char data[16];
541 unsigned int i;
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900542
Arjan van de Ven0b950672006-01-11 13:16:10 +0100543 mutex_lock(&ch->lock);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200544 for (i = 0; i < ch->counts[type]; i++) {
545 if (0 != ch_read_element_status
546 (ch, ch->firsts[type]+i,data)) {
547 retval = -EIO;
548 break;
549 }
550 put_user(data[2], dest+i);
551 if (data[2] & CESTATUS_EXCEPT)
Joe Perches87da3232010-08-10 18:01:22 -0700552 VPRINTK(KERN_INFO, "element 0x%x: asc=0x%x, ascq=0x%x\n",
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200553 ch->firsts[type]+i,
554 (int)data[4],(int)data[5]);
555 retval = ch_read_element_status
556 (ch, ch->firsts[type]+i,data);
557 if (0 != retval)
558 break;
559 }
Arjan van de Ven0b950672006-01-11 13:16:10 +0100560 mutex_unlock(&ch->lock);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200561 return retval;
562}
563
564/* ------------------------------------------------------------------------ */
565
566static int
567ch_release(struct inode *inode, struct file *file)
568{
569 scsi_changer *ch = file->private_data;
570
571 scsi_device_put(ch->device);
572 file->private_data = NULL;
573 return 0;
574}
575
576static int
577ch_open(struct inode *inode, struct file *file)
578{
FUJITA Tomonorida707c52008-01-24 17:24:50 +0900579 scsi_changer *ch;
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200580 int minor = iminor(inode);
581
Arnd Bergmannc45d15d2010-06-02 14:28:52 +0200582 mutex_lock(&ch_mutex);
FUJITA Tomonorida707c52008-01-24 17:24:50 +0900583 spin_lock(&ch_index_lock);
584 ch = idr_find(&ch_index_idr, minor);
585
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200586 if (NULL == ch || scsi_device_get(ch->device)) {
FUJITA Tomonorida707c52008-01-24 17:24:50 +0900587 spin_unlock(&ch_index_lock);
Arnd Bergmannc45d15d2010-06-02 14:28:52 +0200588 mutex_unlock(&ch_mutex);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200589 return -ENXIO;
590 }
FUJITA Tomonorida707c52008-01-24 17:24:50 +0900591 spin_unlock(&ch_index_lock);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200592
593 file->private_data = ch;
Arnd Bergmannc45d15d2010-06-02 14:28:52 +0200594 mutex_unlock(&ch_mutex);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200595 return 0;
596}
597
598static int
599ch_checkrange(scsi_changer *ch, unsigned int type, unsigned int unit)
600{
601 if (type >= CH_TYPES || unit >= ch->counts[type])
602 return -1;
603 return 0;
604}
605
Mathieu Segaudf7fea182008-01-14 15:43:18 +0100606static long ch_ioctl(struct file *file,
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200607 unsigned int cmd, unsigned long arg)
608{
609 scsi_changer *ch = file->private_data;
610 int retval;
viro@ZenIV.linux.org.ukfe08ac32005-09-09 22:03:44 +0100611 void __user *argp = (void __user *)arg;
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900612
Christoph Hellwig906d15f2014-10-11 16:25:31 +0200613 retval = scsi_ioctl_block_when_processing_errors(ch->device, cmd,
614 file->f_flags & O_NDELAY);
615 if (retval)
616 return retval;
617
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200618 switch (cmd) {
619 case CHIOGPARAMS:
620 {
621 struct changer_params params;
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900622
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200623 params.cp_curpicker = 0;
624 params.cp_npickers = ch->counts[CHET_MT];
625 params.cp_nslots = ch->counts[CHET_ST];
626 params.cp_nportals = ch->counts[CHET_IE];
627 params.cp_ndrives = ch->counts[CHET_DT];
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900628
viro@ZenIV.linux.org.ukfe08ac32005-09-09 22:03:44 +0100629 if (copy_to_user(argp, &params, sizeof(params)))
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200630 return -EFAULT;
631 return 0;
632 }
633 case CHIOGVPARAMS:
634 {
635 struct changer_vendor_params vparams;
636
637 memset(&vparams,0,sizeof(vparams));
638 if (ch->counts[CHET_V1]) {
639 vparams.cvp_n1 = ch->counts[CHET_V1];
640 strncpy(vparams.cvp_label1,vendor_labels[0],16);
641 }
642 if (ch->counts[CHET_V2]) {
643 vparams.cvp_n2 = ch->counts[CHET_V2];
644 strncpy(vparams.cvp_label2,vendor_labels[1],16);
645 }
646 if (ch->counts[CHET_V3]) {
647 vparams.cvp_n3 = ch->counts[CHET_V3];
648 strncpy(vparams.cvp_label3,vendor_labels[2],16);
649 }
650 if (ch->counts[CHET_V4]) {
651 vparams.cvp_n4 = ch->counts[CHET_V4];
652 strncpy(vparams.cvp_label4,vendor_labels[3],16);
653 }
viro@ZenIV.linux.org.ukfe08ac32005-09-09 22:03:44 +0100654 if (copy_to_user(argp, &vparams, sizeof(vparams)))
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200655 return -EFAULT;
656 return 0;
657 }
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900658
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200659 case CHIOPOSITION:
660 {
661 struct changer_position pos;
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900662
viro@ZenIV.linux.org.ukfe08ac32005-09-09 22:03:44 +0100663 if (copy_from_user(&pos, argp, sizeof (pos)))
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200664 return -EFAULT;
665
666 if (0 != ch_checkrange(ch, pos.cp_type, pos.cp_unit)) {
Joe Perches87da3232010-08-10 18:01:22 -0700667 DPRINTK("CHIOPOSITION: invalid parameter\n");
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200668 return -EBADSLT;
669 }
Arjan van de Ven0b950672006-01-11 13:16:10 +0100670 mutex_lock(&ch->lock);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200671 retval = ch_position(ch,0,
672 ch->firsts[pos.cp_type] + pos.cp_unit,
673 pos.cp_flags & CP_INVERT);
Arjan van de Ven0b950672006-01-11 13:16:10 +0100674 mutex_unlock(&ch->lock);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200675 return retval;
676 }
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900677
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200678 case CHIOMOVE:
679 {
680 struct changer_move mv;
681
viro@ZenIV.linux.org.ukfe08ac32005-09-09 22:03:44 +0100682 if (copy_from_user(&mv, argp, sizeof (mv)))
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200683 return -EFAULT;
684
685 if (0 != ch_checkrange(ch, mv.cm_fromtype, mv.cm_fromunit) ||
686 0 != ch_checkrange(ch, mv.cm_totype, mv.cm_tounit )) {
Joe Perches87da3232010-08-10 18:01:22 -0700687 DPRINTK("CHIOMOVE: invalid parameter\n");
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200688 return -EBADSLT;
689 }
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900690
Arjan van de Ven0b950672006-01-11 13:16:10 +0100691 mutex_lock(&ch->lock);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200692 retval = ch_move(ch,0,
693 ch->firsts[mv.cm_fromtype] + mv.cm_fromunit,
694 ch->firsts[mv.cm_totype] + mv.cm_tounit,
695 mv.cm_flags & CM_INVERT);
Arjan van de Ven0b950672006-01-11 13:16:10 +0100696 mutex_unlock(&ch->lock);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200697 return retval;
698 }
699
700 case CHIOEXCHANGE:
701 {
702 struct changer_exchange mv;
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900703
viro@ZenIV.linux.org.ukfe08ac32005-09-09 22:03:44 +0100704 if (copy_from_user(&mv, argp, sizeof (mv)))
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200705 return -EFAULT;
706
707 if (0 != ch_checkrange(ch, mv.ce_srctype, mv.ce_srcunit ) ||
708 0 != ch_checkrange(ch, mv.ce_fdsttype, mv.ce_fdstunit) ||
709 0 != ch_checkrange(ch, mv.ce_sdsttype, mv.ce_sdstunit)) {
Joe Perches87da3232010-08-10 18:01:22 -0700710 DPRINTK("CHIOEXCHANGE: invalid parameter\n");
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200711 return -EBADSLT;
712 }
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900713
Arjan van de Ven0b950672006-01-11 13:16:10 +0100714 mutex_lock(&ch->lock);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200715 retval = ch_exchange
716 (ch,0,
717 ch->firsts[mv.ce_srctype] + mv.ce_srcunit,
718 ch->firsts[mv.ce_fdsttype] + mv.ce_fdstunit,
719 ch->firsts[mv.ce_sdsttype] + mv.ce_sdstunit,
720 mv.ce_flags & CE_INVERT1, mv.ce_flags & CE_INVERT2);
Arjan van de Ven0b950672006-01-11 13:16:10 +0100721 mutex_unlock(&ch->lock);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200722 return retval;
723 }
724
725 case CHIOGSTATUS:
726 {
727 struct changer_element_status ces;
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900728
viro@ZenIV.linux.org.ukfe08ac32005-09-09 22:03:44 +0100729 if (copy_from_user(&ces, argp, sizeof (ces)))
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200730 return -EFAULT;
731 if (ces.ces_type < 0 || ces.ces_type >= CH_TYPES)
732 return -EINVAL;
733
734 return ch_gstatus(ch, ces.ces_type, ces.ces_data);
735 }
736
737 case CHIOGELEM:
738 {
739 struct changer_get_element cge;
Harvey Harrisond70d4662008-03-31 22:05:30 -0700740 u_char ch_cmd[12];
741 u_char *buffer;
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200742 unsigned int elem;
743 int result,i;
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900744
viro@ZenIV.linux.org.ukfe08ac32005-09-09 22:03:44 +0100745 if (copy_from_user(&cge, argp, sizeof (cge)))
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200746 return -EFAULT;
747
748 if (0 != ch_checkrange(ch, cge.cge_type, cge.cge_unit))
749 return -EINVAL;
750 elem = ch->firsts[cge.cge_type] + cge.cge_unit;
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900751
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200752 buffer = kmalloc(512, GFP_KERNEL | GFP_DMA);
753 if (!buffer)
754 return -ENOMEM;
Arjan van de Ven0b950672006-01-11 13:16:10 +0100755 mutex_lock(&ch->lock);
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900756
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200757 voltag_retry:
Harvey Harrisond70d4662008-03-31 22:05:30 -0700758 memset(ch_cmd, 0, sizeof(ch_cmd));
759 ch_cmd[0] = READ_ELEMENT_STATUS;
Hannes Reinecke9cb78c12014-06-25 15:27:36 +0200760 ch_cmd[1] = ((ch->device->lun & 0x7) << 5) |
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200761 (ch->voltags ? 0x10 : 0) |
762 ch_elem_to_typecode(ch,elem);
Harvey Harrisond70d4662008-03-31 22:05:30 -0700763 ch_cmd[2] = (elem >> 8) & 0xff;
764 ch_cmd[3] = elem & 0xff;
765 ch_cmd[5] = 1;
766 ch_cmd[9] = 255;
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900767
Hannes Reineckea9a47bf2014-10-24 14:26:57 +0200768 result = ch_do_scsi(ch, ch_cmd, 12,
769 buffer, 256, DMA_FROM_DEVICE);
Harvey Harrisond70d4662008-03-31 22:05:30 -0700770 if (!result) {
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200771 cge.cge_status = buffer[18];
772 cge.cge_flags = 0;
773 if (buffer[18] & CESTATUS_EXCEPT) {
774 cge.cge_errno = EIO;
775 }
776 if (buffer[25] & 0x80) {
777 cge.cge_flags |= CGE_SRC;
778 if (buffer[25] & 0x40)
779 cge.cge_flags |= CGE_INVERT;
780 elem = (buffer[26]<<8) | buffer[27];
781 for (i = 0; i < 4; i++) {
782 if (elem >= ch->firsts[i] &&
783 elem < ch->firsts[i] + ch->counts[i]) {
784 cge.cge_srctype = i;
785 cge.cge_srcunit = elem-ch->firsts[i];
786 }
787 }
788 }
789 if ((buffer[22] & 0x30) == 0x30) {
790 cge.cge_flags |= CGE_IDLUN;
791 cge.cge_id = buffer[23];
792 cge.cge_lun = buffer[22] & 7;
793 }
794 if (buffer[9] & 0x80) {
795 cge.cge_flags |= CGE_PVOLTAG;
796 memcpy(cge.cge_pvoltag,buffer+28,36);
797 }
798 if (buffer[9] & 0x40) {
799 cge.cge_flags |= CGE_AVOLTAG;
800 memcpy(cge.cge_avoltag,buffer+64,36);
801 }
802 } else if (ch->voltags) {
803 ch->voltags = 0;
Joe Perches87da3232010-08-10 18:01:22 -0700804 VPRINTK(KERN_INFO, "device has no volume tag support\n");
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200805 goto voltag_retry;
806 }
807 kfree(buffer);
Arjan van de Ven0b950672006-01-11 13:16:10 +0100808 mutex_unlock(&ch->lock);
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900809
viro@ZenIV.linux.org.ukfe08ac32005-09-09 22:03:44 +0100810 if (copy_to_user(argp, &cge, sizeof (cge)))
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200811 return -EFAULT;
812 return result;
813 }
814
815 case CHIOINITELEM:
816 {
Arjan van de Ven0b950672006-01-11 13:16:10 +0100817 mutex_lock(&ch->lock);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200818 retval = ch_init_elem(ch);
Arjan van de Ven0b950672006-01-11 13:16:10 +0100819 mutex_unlock(&ch->lock);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200820 return retval;
821 }
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900822
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200823 case CHIOSVOLTAG:
824 {
825 struct changer_set_voltag csv;
826 int elem;
827
viro@ZenIV.linux.org.ukfe08ac32005-09-09 22:03:44 +0100828 if (copy_from_user(&csv, argp, sizeof(csv)))
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200829 return -EFAULT;
830
831 if (0 != ch_checkrange(ch, csv.csv_type, csv.csv_unit)) {
Joe Perches87da3232010-08-10 18:01:22 -0700832 DPRINTK("CHIOSVOLTAG: invalid parameter\n");
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200833 return -EBADSLT;
834 }
835 elem = ch->firsts[csv.csv_type] + csv.csv_unit;
Arjan van de Ven0b950672006-01-11 13:16:10 +0100836 mutex_lock(&ch->lock);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200837 retval = ch_set_voltag(ch, elem,
838 csv.csv_flags & CSV_AVOLTAG,
839 csv.csv_flags & CSV_CLEARTAG,
840 csv.csv_voltag);
Arjan van de Ven0b950672006-01-11 13:16:10 +0100841 mutex_unlock(&ch->lock);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200842 return retval;
843 }
844
845 default:
viro@ZenIV.linux.org.ukfe08ac32005-09-09 22:03:44 +0100846 return scsi_ioctl(ch->device, cmd, argp);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200847
848 }
849}
850
851#ifdef CONFIG_COMPAT
852
853struct changer_element_status32 {
854 int ces_type;
855 compat_uptr_t ces_data;
856};
857#define CHIOGSTATUS32 _IOW('c', 8,struct changer_element_status32)
858
859static long ch_ioctl_compat(struct file * file,
860 unsigned int cmd, unsigned long arg)
861{
862 scsi_changer *ch = file->private_data;
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900863
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200864 switch (cmd) {
865 case CHIOGPARAMS:
866 case CHIOGVPARAMS:
867 case CHIOPOSITION:
868 case CHIOMOVE:
869 case CHIOEXCHANGE:
870 case CHIOGELEM:
871 case CHIOINITELEM:
872 case CHIOSVOLTAG:
873 /* compatible */
Mathieu Segaudf7fea182008-01-14 15:43:18 +0100874 return ch_ioctl(file, cmd, arg);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200875 case CHIOGSTATUS32:
876 {
877 struct changer_element_status32 ces32;
viro@ZenIV.linux.org.ukfe08ac32005-09-09 22:03:44 +0100878 unsigned char __user *data;
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900879
viro@ZenIV.linux.org.ukfe08ac32005-09-09 22:03:44 +0100880 if (copy_from_user(&ces32, (void __user *)arg, sizeof (ces32)))
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200881 return -EFAULT;
882 if (ces32.ces_type < 0 || ces32.ces_type >= CH_TYPES)
883 return -EINVAL;
884
885 data = compat_ptr(ces32.ces_data);
886 return ch_gstatus(ch, ces32.ces_type, data);
887 }
888 default:
889 // return scsi_ioctl_compat(ch->device, cmd, (void*)arg);
890 return -ENOIOCTLCMD;
891
892 }
893}
894#endif
895
896/* ------------------------------------------------------------------------ */
897
898static int ch_probe(struct device *dev)
899{
900 struct scsi_device *sd = to_scsi_device(dev);
Tony Jonesee959b02008-02-22 00:13:36 +0100901 struct device *class_dev;
Tejun Heob98c52b2013-02-27 17:04:42 -0800902 int ret;
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200903 scsi_changer *ch;
FUJITA Tomonoria3d2c2e2008-01-23 23:34:35 +0900904
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200905 if (sd->type != TYPE_MEDIUM_CHANGER)
906 return -ENODEV;
FUJITA Tomonoria3d2c2e2008-01-23 23:34:35 +0900907
vignesh.babu@wipro.com4530a162007-04-16 11:35:33 +0530908 ch = kzalloc(sizeof(*ch), GFP_KERNEL);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200909 if (NULL == ch)
910 return -ENOMEM;
911
Tejun Heob98c52b2013-02-27 17:04:42 -0800912 idr_preload(GFP_KERNEL);
FUJITA Tomonorida707c52008-01-24 17:24:50 +0900913 spin_lock(&ch_index_lock);
Tejun Heob98c52b2013-02-27 17:04:42 -0800914 ret = idr_alloc(&ch_index_idr, ch, 0, CH_MAX_DEVS + 1, GFP_NOWAIT);
FUJITA Tomonorida707c52008-01-24 17:24:50 +0900915 spin_unlock(&ch_index_lock);
Tejun Heob98c52b2013-02-27 17:04:42 -0800916 idr_preload_end();
FUJITA Tomonorida707c52008-01-24 17:24:50 +0900917
Tejun Heob98c52b2013-02-27 17:04:42 -0800918 if (ret < 0) {
919 if (ret == -ENOSPC)
920 ret = -ENODEV;
FUJITA Tomonorida707c52008-01-24 17:24:50 +0900921 goto free_ch;
FUJITA Tomonorida707c52008-01-24 17:24:50 +0900922 }
923
Tejun Heob98c52b2013-02-27 17:04:42 -0800924 ch->minor = ret;
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200925 sprintf(ch->name,"ch%d",ch->minor);
FUJITA Tomonoria3d2c2e2008-01-23 23:34:35 +0900926
Greg Kroah-Hartmand73a1a672008-07-21 20:03:34 -0700927 class_dev = device_create(ch_sysfs_class, dev,
928 MKDEV(SCSI_CHANGER_MAJOR, ch->minor), ch,
929 "s%s", ch->name);
FUJITA Tomonoria3d2c2e2008-01-23 23:34:35 +0900930 if (IS_ERR(class_dev)) {
Hannes Reinecke28c31722014-06-25 16:39:56 +0200931 sdev_printk(KERN_WARNING, sd, "ch%d: device_create failed\n",
932 ch->minor);
FUJITA Tomonorida707c52008-01-24 17:24:50 +0900933 ret = PTR_ERR(class_dev);
934 goto remove_idr;
FUJITA Tomonoria3d2c2e2008-01-23 23:34:35 +0900935 }
936
Arjan van de Ven0b950672006-01-11 13:16:10 +0100937 mutex_init(&ch->lock);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200938 ch->device = sd;
939 ch_readconfig(ch);
940 if (init)
941 ch_init_elem(ch);
942
FUJITA Tomonori3d164fb2008-07-26 23:25:43 +0900943 dev_set_drvdata(dev, ch);
Jeff Garzik017560f2005-10-24 18:04:36 -0400944 sdev_printk(KERN_INFO, sd, "Attached scsi changer %s\n", ch->name);
FUJITA Tomonoria3d2c2e2008-01-23 23:34:35 +0900945
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200946 return 0;
FUJITA Tomonorida707c52008-01-24 17:24:50 +0900947remove_idr:
Tejun Heob98c52b2013-02-27 17:04:42 -0800948 idr_remove(&ch_index_idr, ch->minor);
FUJITA Tomonorida707c52008-01-24 17:24:50 +0900949free_ch:
950 kfree(ch);
951 return ret;
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200952}
953
954static int ch_remove(struct device *dev)
955{
FUJITA Tomonorida707c52008-01-24 17:24:50 +0900956 scsi_changer *ch = dev_get_drvdata(dev);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200957
FUJITA Tomonorida707c52008-01-24 17:24:50 +0900958 spin_lock(&ch_index_lock);
959 idr_remove(&ch_index_idr, ch->minor);
960 spin_unlock(&ch_index_lock);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200961
Tony Jonesee959b02008-02-22 00:13:36 +0100962 device_destroy(ch_sysfs_class, MKDEV(SCSI_CHANGER_MAJOR,ch->minor));
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200963 kfree(ch->dt);
964 kfree(ch);
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200965 return 0;
966}
967
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900968static struct scsi_driver ch_template = {
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900969 .gendrv = {
970 .name = "ch",
Christoph Hellwig3af6b352014-11-12 18:34:51 +0100971 .owner = THIS_MODULE,
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900972 .probe = ch_probe,
973 .remove = ch_remove,
974 },
975};
976
977static const struct file_operations changer_fops = {
978 .owner = THIS_MODULE,
979 .open = ch_open,
980 .release = ch_release,
981 .unlocked_ioctl = ch_ioctl,
982#ifdef CONFIG_COMPAT
983 .compat_ioctl = ch_ioctl_compat,
984#endif
Arnd Bergmann6038f372010-08-15 18:52:59 +0200985 .llseek = noop_llseek,
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900986};
987
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200988static int __init init_ch_module(void)
989{
990 int rc;
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +0900991
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200992 printk(KERN_INFO "SCSI Media Changer driver v" VERSION " \n");
Gerd Knorr 21feb5c2005-05-12 10:25:26 +0200993 ch_sysfs_class = class_create(THIS_MODULE, "scsi_changer");
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200994 if (IS_ERR(ch_sysfs_class)) {
995 rc = PTR_ERR(ch_sysfs_class);
996 return rc;
997 }
998 rc = register_chrdev(SCSI_CHANGER_MAJOR,"ch",&changer_fops);
999 if (rc < 0) {
1000 printk("Unable to get major %d for SCSI-Changer\n",
1001 SCSI_CHANGER_MAJOR);
1002 goto fail1;
1003 }
1004 rc = scsi_register_driver(&ch_template.gendrv);
1005 if (rc < 0)
1006 goto fail2;
1007 return 0;
1008
1009 fail2:
1010 unregister_chrdev(SCSI_CHANGER_MAJOR, "ch");
1011 fail1:
Gerd Knorr 21feb5c2005-05-12 10:25:26 +02001012 class_destroy(ch_sysfs_class);
Gerd Knorr daa6eda2005-05-10 10:59:13 +02001013 return rc;
1014}
1015
FUJITA Tomonori5aa22af2008-01-24 17:24:52 +09001016static void __exit exit_ch_module(void)
Gerd Knorr daa6eda2005-05-10 10:59:13 +02001017{
1018 scsi_unregister_driver(&ch_template.gendrv);
1019 unregister_chrdev(SCSI_CHANGER_MAJOR, "ch");
Gerd Knorr 21feb5c2005-05-12 10:25:26 +02001020 class_destroy(ch_sysfs_class);
FUJITA Tomonorida707c52008-01-24 17:24:50 +09001021 idr_destroy(&ch_index_idr);
Gerd Knorr daa6eda2005-05-10 10:59:13 +02001022}
1023
1024module_init(init_ch_module);
1025module_exit(exit_ch_module);
1026
1027/*
1028 * Local variables:
1029 * c-basic-offset: 8
1030 * End:
1031 */