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Commit | Line | Data |
---|---|---|
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 | ||
37 | MODULE_DESCRIPTION("device driver for scsi media changer devices"); | |
38 | MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org>"); | |
39 | MODULE_LICENSE("GPL"); | |
f018fa55 | 40 | MODULE_ALIAS_CHARDEV_MAJOR(SCSI_CHANGER_MAJOR); |
daa6eda6 GK |
41 | |
42 | static int init = 1; | |
43 | module_param(init, int, 0444); | |
44 | MODULE_PARM_DESC(init, \ | |
45 | "initialize element status on driver load (default: on)"); | |
46 | ||
47 | static int timeout_move = 300; | |
48 | module_param(timeout_move, int, 0644); | |
49 | MODULE_PARM_DESC(timeout_move,"timeout for move commands " | |
50 | "(default: 300 seconds)"); | |
51 | ||
52 | static int timeout_init = 3600; | |
53 | module_param(timeout_init, int, 0644); | |
54 | MODULE_PARM_DESC(timeout_init,"timeout for INITIALIZE ELEMENT STATUS " | |
55 | "(default: 3600 seconds)"); | |
56 | ||
57 | static int verbose = 1; | |
58 | module_param(verbose, int, 0644); | |
59 | MODULE_PARM_DESC(verbose,"be verbose (default: on)"); | |
60 | ||
61 | static int debug = 0; | |
62 | module_param(debug, int, 0644); | |
63 | MODULE_PARM_DESC(debug,"enable/disable debug messages, also prints more " | |
64 | "detailed sense codes on scsi errors (default: off)"); | |
65 | ||
66 | static int dt_id[CH_DT_MAX] = { [ 0 ... (CH_DT_MAX-1) ] = -1 }; | |
67 | static int dt_lun[CH_DT_MAX]; | |
68 | module_param_array(dt_id, int, NULL, 0444); | |
69 | module_param_array(dt_lun, int, NULL, 0444); | |
70 | ||
71 | /* tell the driver about vendor-specific slots */ | |
72 | static int vendor_firsts[CH_TYPES-4]; | |
73 | static int vendor_counts[CH_TYPES-4]; | |
74 | module_param_array(vendor_firsts, int, NULL, 0444); | |
75 | module_param_array(vendor_counts, int, NULL, 0444); | |
76 | ||
0ad78200 | 77 | static 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 | ||
91 | static int ch_probe(struct device *); | |
92 | static int ch_remove(struct device *); | |
93 | static int ch_open(struct inode * inode, struct file * filp); | |
94 | static int ch_release(struct inode * inode, struct file * filp); | |
f7fea185 | 95 | static long ch_ioctl(struct file *filp, unsigned int cmd, unsigned long arg); |
daa6eda6 GK |
96 | #ifdef CONFIG_COMPAT |
97 | static long ch_ioctl_compat(struct file * filp, | |
98 | unsigned int cmd, unsigned long arg); | |
99 | #endif | |
100 | ||
21feb5cc | 101 | static struct class * ch_sysfs_class; |
daa6eda6 GK |
102 | |
103 | typedef 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 | ||
116 | static LIST_HEAD(ch_devlist); | |
a9f6a0dd | 117 | static DEFINE_SPINLOCK(ch_devlist_lock); |
daa6eda6 GK |
118 | static int ch_devcount; |
119 | ||
120 | static 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 | 130 | static 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 | 141 | static 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 | 181 | static 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 | ||
202 | static int | |
203 | ch_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 | ||
243 | static int | |
244 | ch_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 | ||
257 | static int | |
258 | ch_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 | ||
298 | static int | |
299 | ch_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 | ||
313 | static int | |
314 | ch_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 | ||
441 | static int | |
442 | ch_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 | ||
460 | static int | |
461 | ch_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 | ||
481 | static int | |
482 | ch_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 | ||
507 | static void | |
508 | ch_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 | ||
523 | static int | |
524 | ch_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 | 559 | static 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 | ||
588 | static int | |
589 | ch_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 | ||
598 | static int | |
599 | ch_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 | ||
620 | static int | |
621 | ch_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 | 628 | static 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, ¶ms, 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 | ||
868 | struct 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 | ||
874 | static 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 | ||
913 | static 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 | ||
946 | static 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 | ||
969 | static 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 | ||
997 | static 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 | ||
1004 | module_init(init_ch_module); | |
1005 | module_exit(exit_ch_module); | |
1006 | ||
1007 | /* | |
1008 | * Local variables: | |
1009 | * c-basic-offset: 8 | |
1010 | * End: | |
1011 | */ |