Gerd Knorr | daa6eda | 2005-05-10 10:59:13 +0200 | [diff] [blame] | 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 | |
| 10 | #include <linux/config.h> |
| 11 | #include <linux/module.h> |
| 12 | #include <linux/init.h> |
| 13 | #include <linux/fs.h> |
| 14 | #include <linux/kernel.h> |
| 15 | #include <linux/sched.h> |
| 16 | #include <linux/mm.h> |
| 17 | #include <linux/major.h> |
| 18 | #include <linux/string.h> |
| 19 | #include <linux/errno.h> |
| 20 | #include <linux/interrupt.h> |
| 21 | #include <linux/blkdev.h> |
| 22 | #include <linux/completion.h> |
| 23 | #include <linux/devfs_fs_kernel.h> |
| 24 | #include <linux/ioctl32.h> |
| 25 | #include <linux/compat.h> |
| 26 | #include <linux/chio.h> /* here are all the ioctls */ |
| 27 | |
| 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> |
| 34 | #include <scsi/scsi_request.h> |
| 35 | #include <scsi/scsi_dbg.h> |
| 36 | |
| 37 | #define CH_DT_MAX 16 |
| 38 | #define CH_TYPES 8 |
| 39 | |
| 40 | MODULE_DESCRIPTION("device driver for scsi media changer devices"); |
| 41 | MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org>"); |
| 42 | MODULE_LICENSE("GPL"); |
| 43 | |
| 44 | static int init = 1; |
| 45 | module_param(init, int, 0444); |
| 46 | MODULE_PARM_DESC(init, \ |
| 47 | "initialize element status on driver load (default: on)"); |
| 48 | |
| 49 | static int timeout_move = 300; |
| 50 | module_param(timeout_move, int, 0644); |
| 51 | MODULE_PARM_DESC(timeout_move,"timeout for move commands " |
| 52 | "(default: 300 seconds)"); |
| 53 | |
| 54 | static int timeout_init = 3600; |
| 55 | module_param(timeout_init, int, 0644); |
| 56 | MODULE_PARM_DESC(timeout_init,"timeout for INITIALIZE ELEMENT STATUS " |
| 57 | "(default: 3600 seconds)"); |
| 58 | |
| 59 | static int verbose = 1; |
| 60 | module_param(verbose, int, 0644); |
| 61 | MODULE_PARM_DESC(verbose,"be verbose (default: on)"); |
| 62 | |
| 63 | static int debug = 0; |
| 64 | module_param(debug, int, 0644); |
| 65 | MODULE_PARM_DESC(debug,"enable/disable debug messages, also prints more " |
| 66 | "detailed sense codes on scsi errors (default: off)"); |
| 67 | |
| 68 | static int dt_id[CH_DT_MAX] = { [ 0 ... (CH_DT_MAX-1) ] = -1 }; |
| 69 | static int dt_lun[CH_DT_MAX]; |
| 70 | module_param_array(dt_id, int, NULL, 0444); |
| 71 | module_param_array(dt_lun, int, NULL, 0444); |
| 72 | |
| 73 | /* tell the driver about vendor-specific slots */ |
| 74 | static int vendor_firsts[CH_TYPES-4]; |
| 75 | static int vendor_counts[CH_TYPES-4]; |
| 76 | module_param_array(vendor_firsts, int, NULL, 0444); |
| 77 | module_param_array(vendor_counts, int, NULL, 0444); |
| 78 | |
| 79 | static char *vendor_labels[CH_TYPES-4] = { |
| 80 | "v0", "v1", "v2", "v3" |
| 81 | }; |
| 82 | // module_param_string_array(vendor_labels, NULL, 0444); |
| 83 | |
| 84 | #define dprintk(fmt, arg...) if (debug) \ |
| 85 | printk(KERN_DEBUG "%s: " fmt, ch->name , ## arg) |
| 86 | #define vprintk(fmt, arg...) if (verbose) \ |
| 87 | printk(KERN_INFO "%s: " fmt, ch->name , ## arg) |
| 88 | |
| 89 | /* ------------------------------------------------------------------- */ |
| 90 | |
| 91 | #define MAX_RETRIES 1 |
| 92 | |
| 93 | static int ch_probe(struct device *); |
| 94 | static int ch_remove(struct device *); |
| 95 | static int ch_open(struct inode * inode, struct file * filp); |
| 96 | static int ch_release(struct inode * inode, struct file * filp); |
| 97 | static int ch_ioctl(struct inode * inode, struct file * filp, |
| 98 | unsigned int cmd, unsigned long arg); |
| 99 | #ifdef CONFIG_COMPAT |
| 100 | static long ch_ioctl_compat(struct file * filp, |
| 101 | unsigned int cmd, unsigned long arg); |
| 102 | #endif |
| 103 | |
Gerd Knorr | 21feb5c | 2005-05-12 10:25:26 +0200 | [diff] [blame] | 104 | static struct class * ch_sysfs_class; |
Gerd Knorr | daa6eda | 2005-05-10 10:59:13 +0200 | [diff] [blame] | 105 | |
| 106 | typedef struct { |
| 107 | struct list_head list; |
| 108 | int minor; |
| 109 | char name[8]; |
| 110 | struct scsi_device *device; |
| 111 | struct scsi_device **dt; /* ptrs to data transfer elements */ |
| 112 | u_int firsts[CH_TYPES]; |
| 113 | u_int counts[CH_TYPES]; |
| 114 | u_int unit_attention; |
| 115 | u_int voltags; |
| 116 | struct semaphore lock; |
| 117 | } scsi_changer; |
| 118 | |
| 119 | static LIST_HEAD(ch_devlist); |
| 120 | static spinlock_t ch_devlist_lock = SPIN_LOCK_UNLOCKED; |
| 121 | static int ch_devcount; |
| 122 | |
| 123 | static struct scsi_driver ch_template = |
| 124 | { |
| 125 | .owner = THIS_MODULE, |
| 126 | .gendrv = { |
| 127 | .name = "ch", |
| 128 | .probe = ch_probe, |
| 129 | .remove = ch_remove, |
| 130 | }, |
| 131 | }; |
| 132 | |
| 133 | static struct file_operations changer_fops = |
| 134 | { |
| 135 | .owner = THIS_MODULE, |
| 136 | .open = ch_open, |
| 137 | .release = ch_release, |
| 138 | .ioctl = ch_ioctl, |
| 139 | #ifdef CONFIG_COMPAT |
| 140 | .compat_ioctl = ch_ioctl_compat, |
| 141 | #endif |
| 142 | }; |
| 143 | |
| 144 | static struct { |
| 145 | unsigned char sense; |
| 146 | unsigned char asc; |
| 147 | unsigned char ascq; |
| 148 | int errno; |
| 149 | } err[] = { |
| 150 | /* Just filled in what looks right. Hav'nt checked any standard paper for |
| 151 | these errno assignments, so they may be wrong... */ |
| 152 | { |
| 153 | .sense = ILLEGAL_REQUEST, |
| 154 | .asc = 0x21, |
| 155 | .ascq = 0x01, |
| 156 | .errno = EBADSLT, /* Invalid element address */ |
| 157 | },{ |
| 158 | .sense = ILLEGAL_REQUEST, |
| 159 | .asc = 0x28, |
| 160 | .ascq = 0x01, |
| 161 | .errno = EBADE, /* Import or export element accessed */ |
| 162 | },{ |
| 163 | .sense = ILLEGAL_REQUEST, |
| 164 | .asc = 0x3B, |
| 165 | .ascq = 0x0D, |
| 166 | .errno = EXFULL, /* Medium destination element full */ |
| 167 | },{ |
| 168 | .sense = ILLEGAL_REQUEST, |
| 169 | .asc = 0x3B, |
| 170 | .ascq = 0x0E, |
| 171 | .errno = EBADE, /* Medium source element empty */ |
| 172 | },{ |
| 173 | .sense = ILLEGAL_REQUEST, |
| 174 | .asc = 0x20, |
| 175 | .ascq = 0x00, |
| 176 | .errno = EBADRQC, /* Invalid command operation code */ |
| 177 | },{ |
| 178 | /* end of list */ |
| 179 | } |
| 180 | }; |
| 181 | |
| 182 | /* ------------------------------------------------------------------- */ |
| 183 | |
| 184 | static int ch_find_errno(unsigned char *sense_buffer) |
| 185 | { |
| 186 | int i,errno = 0; |
| 187 | |
| 188 | /* Check to see if additional sense information is available */ |
| 189 | if (sense_buffer[7] > 5 && |
| 190 | sense_buffer[12] != 0) { |
| 191 | for (i = 0; err[i].errno != 0; i++) { |
| 192 | if (err[i].sense == sense_buffer[ 2] && |
| 193 | err[i].asc == sense_buffer[12] && |
| 194 | err[i].ascq == sense_buffer[13]) { |
| 195 | errno = -err[i].errno; |
| 196 | break; |
| 197 | } |
| 198 | } |
| 199 | } |
| 200 | if (errno == 0) |
| 201 | errno = -EIO; |
| 202 | return errno; |
| 203 | } |
| 204 | |
| 205 | static int |
| 206 | ch_do_scsi(scsi_changer *ch, unsigned char *cmd, |
| 207 | void *buffer, unsigned buflength, |
| 208 | enum dma_data_direction direction) |
| 209 | { |
| 210 | int errno, retries = 0, timeout; |
| 211 | struct scsi_request *sr; |
| 212 | |
| 213 | sr = scsi_allocate_request(ch->device, GFP_KERNEL); |
| 214 | if (NULL == sr) |
| 215 | return -ENOMEM; |
| 216 | |
| 217 | timeout = (cmd[0] == INITIALIZE_ELEMENT_STATUS) |
| 218 | ? timeout_init : timeout_move; |
| 219 | |
| 220 | retry: |
| 221 | errno = 0; |
| 222 | if (debug) { |
| 223 | dprintk("command: "); |
| 224 | __scsi_print_command(cmd); |
| 225 | } |
| 226 | |
| 227 | scsi_wait_req(sr, cmd, buffer, buflength, |
| 228 | timeout * HZ, MAX_RETRIES); |
| 229 | |
| 230 | dprintk("result: 0x%x\n",sr->sr_result); |
| 231 | if (driver_byte(sr->sr_result) & DRIVER_SENSE) { |
| 232 | if (debug) |
| 233 | scsi_print_req_sense(ch->name, sr); |
| 234 | errno = ch_find_errno(sr->sr_sense_buffer); |
| 235 | |
| 236 | switch(sr->sr_sense_buffer[2] & 0xf) { |
| 237 | case UNIT_ATTENTION: |
| 238 | ch->unit_attention = 1; |
| 239 | if (retries++ < 3) |
| 240 | goto retry; |
| 241 | break; |
| 242 | } |
| 243 | } |
| 244 | scsi_release_request(sr); |
| 245 | return errno; |
| 246 | } |
| 247 | |
| 248 | /* ------------------------------------------------------------------------ */ |
| 249 | |
| 250 | static int |
| 251 | ch_elem_to_typecode(scsi_changer *ch, u_int elem) |
| 252 | { |
| 253 | int i; |
| 254 | |
| 255 | for (i = 0; i < CH_TYPES; i++) { |
| 256 | if (elem >= ch->firsts[i] && |
| 257 | elem < ch->firsts[i] + |
| 258 | ch->counts[i]) |
| 259 | return i+1; |
| 260 | } |
| 261 | return 0; |
| 262 | } |
| 263 | |
| 264 | static int |
| 265 | ch_read_element_status(scsi_changer *ch, u_int elem, char *data) |
| 266 | { |
| 267 | u_char cmd[12]; |
| 268 | u_char *buffer; |
| 269 | int result; |
| 270 | |
| 271 | buffer = kmalloc(512, GFP_KERNEL | GFP_DMA); |
| 272 | if(!buffer) |
| 273 | return -ENOMEM; |
| 274 | |
| 275 | retry: |
| 276 | memset(cmd,0,sizeof(cmd)); |
| 277 | cmd[0] = READ_ELEMENT_STATUS; |
| 278 | cmd[1] = (ch->device->lun << 5) | |
| 279 | (ch->voltags ? 0x10 : 0) | |
| 280 | ch_elem_to_typecode(ch,elem); |
| 281 | cmd[2] = (elem >> 8) & 0xff; |
| 282 | cmd[3] = elem & 0xff; |
| 283 | cmd[5] = 1; |
| 284 | cmd[9] = 255; |
| 285 | if (0 == (result = ch_do_scsi(ch, cmd, buffer, 256, DMA_FROM_DEVICE))) { |
| 286 | if (((buffer[16] << 8) | buffer[17]) != elem) { |
| 287 | dprintk("asked for element 0x%02x, got 0x%02x\n", |
| 288 | elem,(buffer[16] << 8) | buffer[17]); |
| 289 | kfree(buffer); |
| 290 | return -EIO; |
| 291 | } |
| 292 | memcpy(data,buffer+16,16); |
| 293 | } else { |
| 294 | if (ch->voltags) { |
| 295 | ch->voltags = 0; |
| 296 | vprintk("device has no volume tag support\n"); |
| 297 | goto retry; |
| 298 | } |
| 299 | dprintk("READ ELEMENT STATUS for element 0x%x failed\n",elem); |
| 300 | } |
| 301 | kfree(buffer); |
| 302 | return result; |
| 303 | } |
| 304 | |
| 305 | static int |
| 306 | ch_init_elem(scsi_changer *ch) |
| 307 | { |
| 308 | int err; |
| 309 | u_char cmd[6]; |
| 310 | |
| 311 | vprintk("INITIALIZE ELEMENT STATUS, may take some time ...\n"); |
| 312 | memset(cmd,0,sizeof(cmd)); |
| 313 | cmd[0] = INITIALIZE_ELEMENT_STATUS; |
| 314 | cmd[1] = ch->device->lun << 5; |
| 315 | err = ch_do_scsi(ch, cmd, NULL, 0, DMA_NONE); |
| 316 | vprintk("... finished\n"); |
| 317 | return err; |
| 318 | } |
| 319 | |
| 320 | static int |
| 321 | ch_readconfig(scsi_changer *ch) |
| 322 | { |
| 323 | u_char cmd[10], data[16]; |
| 324 | u_char *buffer; |
| 325 | int result,id,lun,i; |
| 326 | u_int elem; |
| 327 | |
| 328 | buffer = kmalloc(512, GFP_KERNEL | GFP_DMA); |
| 329 | if (!buffer) |
| 330 | return -ENOMEM; |
| 331 | memset(buffer,0,512); |
| 332 | |
| 333 | memset(cmd,0,sizeof(cmd)); |
| 334 | cmd[0] = MODE_SENSE; |
| 335 | cmd[1] = ch->device->lun << 5; |
| 336 | cmd[2] = 0x1d; |
| 337 | cmd[4] = 255; |
| 338 | result = ch_do_scsi(ch, cmd, buffer, 255, DMA_FROM_DEVICE); |
| 339 | if (0 != result) { |
| 340 | cmd[1] |= (1<<3); |
| 341 | result = ch_do_scsi(ch, cmd, buffer, 255, DMA_FROM_DEVICE); |
| 342 | } |
| 343 | if (0 == result) { |
| 344 | ch->firsts[CHET_MT] = |
| 345 | (buffer[buffer[3]+ 6] << 8) | buffer[buffer[3]+ 7]; |
| 346 | ch->counts[CHET_MT] = |
| 347 | (buffer[buffer[3]+ 8] << 8) | buffer[buffer[3]+ 9]; |
| 348 | ch->firsts[CHET_ST] = |
| 349 | (buffer[buffer[3]+10] << 8) | buffer[buffer[3]+11]; |
| 350 | ch->counts[CHET_ST] = |
| 351 | (buffer[buffer[3]+12] << 8) | buffer[buffer[3]+13]; |
| 352 | ch->firsts[CHET_IE] = |
| 353 | (buffer[buffer[3]+14] << 8) | buffer[buffer[3]+15]; |
| 354 | ch->counts[CHET_IE] = |
| 355 | (buffer[buffer[3]+16] << 8) | buffer[buffer[3]+17]; |
| 356 | ch->firsts[CHET_DT] = |
| 357 | (buffer[buffer[3]+18] << 8) | buffer[buffer[3]+19]; |
| 358 | ch->counts[CHET_DT] = |
| 359 | (buffer[buffer[3]+20] << 8) | buffer[buffer[3]+21]; |
| 360 | vprintk("type #1 (mt): 0x%x+%d [medium transport]\n", |
| 361 | ch->firsts[CHET_MT], |
| 362 | ch->counts[CHET_MT]); |
| 363 | vprintk("type #2 (st): 0x%x+%d [storage]\n", |
| 364 | ch->firsts[CHET_ST], |
| 365 | ch->counts[CHET_ST]); |
| 366 | vprintk("type #3 (ie): 0x%x+%d [import/export]\n", |
| 367 | ch->firsts[CHET_IE], |
| 368 | ch->counts[CHET_IE]); |
| 369 | vprintk("type #4 (dt): 0x%x+%d [data transfer]\n", |
| 370 | ch->firsts[CHET_DT], |
| 371 | ch->counts[CHET_DT]); |
| 372 | } else { |
| 373 | vprintk("reading element address assigment page failed!\n"); |
| 374 | } |
| 375 | |
| 376 | /* vendor specific element types */ |
| 377 | for (i = 0; i < 4; i++) { |
| 378 | if (0 == vendor_counts[i]) |
| 379 | continue; |
| 380 | if (NULL == vendor_labels[i]) |
| 381 | continue; |
| 382 | ch->firsts[CHET_V1+i] = vendor_firsts[i]; |
| 383 | ch->counts[CHET_V1+i] = vendor_counts[i]; |
| 384 | vprintk("type #%d (v%d): 0x%x+%d [%s, vendor specific]\n", |
| 385 | i+5,i+1,vendor_firsts[i],vendor_counts[i], |
| 386 | vendor_labels[i]); |
| 387 | } |
| 388 | |
| 389 | /* look up the devices of the data transfer elements */ |
| 390 | ch->dt = kmalloc(ch->counts[CHET_DT]*sizeof(struct scsi_device), |
| 391 | GFP_KERNEL); |
| 392 | for (elem = 0; elem < ch->counts[CHET_DT]; elem++) { |
| 393 | id = -1; |
| 394 | lun = 0; |
| 395 | if (elem < CH_DT_MAX && -1 != dt_id[elem]) { |
| 396 | id = dt_id[elem]; |
| 397 | lun = dt_lun[elem]; |
| 398 | vprintk("dt 0x%x: [insmod option] ", |
| 399 | elem+ch->firsts[CHET_DT]); |
| 400 | } else if (0 != ch_read_element_status |
| 401 | (ch,elem+ch->firsts[CHET_DT],data)) { |
| 402 | vprintk("dt 0x%x: READ ELEMENT STATUS failed\n", |
| 403 | elem+ch->firsts[CHET_DT]); |
| 404 | } else { |
| 405 | vprintk("dt 0x%x: ",elem+ch->firsts[CHET_DT]); |
| 406 | if (data[6] & 0x80) { |
| 407 | if (verbose) |
| 408 | printk("not this SCSI bus\n"); |
| 409 | ch->dt[elem] = NULL; |
| 410 | } else if (0 == (data[6] & 0x30)) { |
| 411 | if (verbose) |
| 412 | printk("ID/LUN unknown\n"); |
| 413 | ch->dt[elem] = NULL; |
| 414 | } else { |
| 415 | id = ch->device->id; |
| 416 | lun = 0; |
| 417 | if (data[6] & 0x20) id = data[7]; |
| 418 | if (data[6] & 0x10) lun = data[6] & 7; |
| 419 | } |
| 420 | } |
| 421 | if (-1 != id) { |
| 422 | if (verbose) |
| 423 | printk("ID %i, LUN %i, ",id,lun); |
| 424 | ch->dt[elem] = |
| 425 | scsi_device_lookup(ch->device->host, |
| 426 | ch->device->channel, |
| 427 | id,lun); |
| 428 | if (!ch->dt[elem]) { |
| 429 | /* should not happen */ |
| 430 | if (verbose) |
| 431 | printk("Huh? device not found!\n"); |
| 432 | } else { |
| 433 | if (verbose) |
| 434 | printk("name: %8.8s %16.16s %4.4s\n", |
| 435 | ch->dt[elem]->vendor, |
| 436 | ch->dt[elem]->model, |
| 437 | ch->dt[elem]->rev); |
| 438 | } |
| 439 | } |
| 440 | } |
| 441 | ch->voltags = 1; |
| 442 | kfree(buffer); |
| 443 | |
| 444 | return 0; |
| 445 | } |
| 446 | |
| 447 | /* ------------------------------------------------------------------------ */ |
| 448 | |
| 449 | static int |
| 450 | ch_position(scsi_changer *ch, u_int trans, u_int elem, int rotate) |
| 451 | { |
| 452 | u_char cmd[10]; |
| 453 | |
| 454 | dprintk("position: 0x%x\n",elem); |
| 455 | if (0 == trans) |
| 456 | trans = ch->firsts[CHET_MT]; |
| 457 | memset(cmd,0,sizeof(cmd)); |
| 458 | cmd[0] = POSITION_TO_ELEMENT; |
| 459 | cmd[1] = ch->device->lun << 5; |
| 460 | cmd[2] = (trans >> 8) & 0xff; |
| 461 | cmd[3] = trans & 0xff; |
| 462 | cmd[4] = (elem >> 8) & 0xff; |
| 463 | cmd[5] = elem & 0xff; |
| 464 | cmd[8] = rotate ? 1 : 0; |
| 465 | return ch_do_scsi(ch, cmd, NULL, 0, DMA_NONE); |
| 466 | } |
| 467 | |
| 468 | static int |
| 469 | ch_move(scsi_changer *ch, u_int trans, u_int src, u_int dest, int rotate) |
| 470 | { |
| 471 | u_char cmd[12]; |
| 472 | |
| 473 | dprintk("move: 0x%x => 0x%x\n",src,dest); |
| 474 | if (0 == trans) |
| 475 | trans = ch->firsts[CHET_MT]; |
| 476 | memset(cmd,0,sizeof(cmd)); |
| 477 | cmd[0] = MOVE_MEDIUM; |
| 478 | cmd[1] = ch->device->lun << 5; |
| 479 | cmd[2] = (trans >> 8) & 0xff; |
| 480 | cmd[3] = trans & 0xff; |
| 481 | cmd[4] = (src >> 8) & 0xff; |
| 482 | cmd[5] = src & 0xff; |
| 483 | cmd[6] = (dest >> 8) & 0xff; |
| 484 | cmd[7] = dest & 0xff; |
| 485 | cmd[10] = rotate ? 1 : 0; |
| 486 | return ch_do_scsi(ch, cmd, NULL,0, DMA_NONE); |
| 487 | } |
| 488 | |
| 489 | static int |
| 490 | ch_exchange(scsi_changer *ch, u_int trans, u_int src, |
| 491 | u_int dest1, u_int dest2, int rotate1, int rotate2) |
| 492 | { |
| 493 | u_char cmd[12]; |
| 494 | |
| 495 | dprintk("exchange: 0x%x => 0x%x => 0x%x\n", |
| 496 | src,dest1,dest2); |
| 497 | if (0 == trans) |
| 498 | trans = ch->firsts[CHET_MT]; |
| 499 | memset(cmd,0,sizeof(cmd)); |
| 500 | cmd[0] = EXCHANGE_MEDIUM; |
| 501 | cmd[1] = ch->device->lun << 5; |
| 502 | cmd[2] = (trans >> 8) & 0xff; |
| 503 | cmd[3] = trans & 0xff; |
| 504 | cmd[4] = (src >> 8) & 0xff; |
| 505 | cmd[5] = src & 0xff; |
| 506 | cmd[6] = (dest1 >> 8) & 0xff; |
| 507 | cmd[7] = dest1 & 0xff; |
| 508 | cmd[8] = (dest2 >> 8) & 0xff; |
| 509 | cmd[9] = dest2 & 0xff; |
| 510 | cmd[10] = (rotate1 ? 1 : 0) | (rotate2 ? 2 : 0); |
| 511 | |
| 512 | return ch_do_scsi(ch, cmd, NULL,0, DMA_NONE); |
| 513 | } |
| 514 | |
| 515 | static void |
| 516 | ch_check_voltag(char *tag) |
| 517 | { |
| 518 | int i; |
| 519 | |
| 520 | for (i = 0; i < 32; i++) { |
| 521 | /* restrict to ascii */ |
| 522 | if (tag[i] >= 0x7f || tag[i] < 0x20) |
| 523 | tag[i] = ' '; |
| 524 | /* don't allow search wildcards */ |
| 525 | if (tag[i] == '?' || |
| 526 | tag[i] == '*') |
| 527 | tag[i] = ' '; |
| 528 | } |
| 529 | } |
| 530 | |
| 531 | static int |
| 532 | ch_set_voltag(scsi_changer *ch, u_int elem, |
| 533 | int alternate, int clear, u_char *tag) |
| 534 | { |
| 535 | u_char cmd[12]; |
| 536 | u_char *buffer; |
| 537 | int result; |
| 538 | |
| 539 | buffer = kmalloc(512, GFP_KERNEL); |
| 540 | if (!buffer) |
| 541 | return -ENOMEM; |
| 542 | memset(buffer,0,512); |
| 543 | |
| 544 | dprintk("%s %s voltag: 0x%x => \"%s\"\n", |
| 545 | clear ? "clear" : "set", |
| 546 | alternate ? "alternate" : "primary", |
| 547 | elem, tag); |
| 548 | memset(cmd,0,sizeof(cmd)); |
| 549 | cmd[0] = SEND_VOLUME_TAG; |
| 550 | cmd[1] = (ch->device->lun << 5) | |
| 551 | ch_elem_to_typecode(ch,elem); |
| 552 | cmd[2] = (elem >> 8) & 0xff; |
| 553 | cmd[3] = elem & 0xff; |
| 554 | cmd[5] = clear |
| 555 | ? (alternate ? 0x0d : 0x0c) |
| 556 | : (alternate ? 0x0b : 0x0a); |
| 557 | |
| 558 | cmd[9] = 255; |
| 559 | |
| 560 | memcpy(buffer,tag,32); |
| 561 | ch_check_voltag(buffer); |
| 562 | |
| 563 | result = ch_do_scsi(ch, cmd, buffer, 256, DMA_TO_DEVICE); |
| 564 | kfree(buffer); |
| 565 | return result; |
| 566 | } |
| 567 | |
| 568 | static int ch_gstatus(scsi_changer *ch, int type, unsigned char *dest) |
| 569 | { |
| 570 | int retval = 0; |
| 571 | u_char data[16]; |
| 572 | unsigned int i; |
| 573 | |
| 574 | down(&ch->lock); |
| 575 | for (i = 0; i < ch->counts[type]; i++) { |
| 576 | if (0 != ch_read_element_status |
| 577 | (ch, ch->firsts[type]+i,data)) { |
| 578 | retval = -EIO; |
| 579 | break; |
| 580 | } |
| 581 | put_user(data[2], dest+i); |
| 582 | if (data[2] & CESTATUS_EXCEPT) |
| 583 | vprintk("element 0x%x: asc=0x%x, ascq=0x%x\n", |
| 584 | ch->firsts[type]+i, |
| 585 | (int)data[4],(int)data[5]); |
| 586 | retval = ch_read_element_status |
| 587 | (ch, ch->firsts[type]+i,data); |
| 588 | if (0 != retval) |
| 589 | break; |
| 590 | } |
| 591 | up(&ch->lock); |
| 592 | return retval; |
| 593 | } |
| 594 | |
| 595 | /* ------------------------------------------------------------------------ */ |
| 596 | |
| 597 | static int |
| 598 | ch_release(struct inode *inode, struct file *file) |
| 599 | { |
| 600 | scsi_changer *ch = file->private_data; |
| 601 | |
| 602 | scsi_device_put(ch->device); |
| 603 | file->private_data = NULL; |
| 604 | return 0; |
| 605 | } |
| 606 | |
| 607 | static int |
| 608 | ch_open(struct inode *inode, struct file *file) |
| 609 | { |
| 610 | scsi_changer *tmp, *ch; |
| 611 | int minor = iminor(inode); |
| 612 | |
| 613 | spin_lock(&ch_devlist_lock); |
| 614 | ch = NULL; |
| 615 | list_for_each_entry(tmp,&ch_devlist,list) { |
| 616 | if (tmp->minor == minor) |
| 617 | ch = tmp; |
| 618 | } |
| 619 | if (NULL == ch || scsi_device_get(ch->device)) { |
| 620 | spin_unlock(&ch_devlist_lock); |
| 621 | return -ENXIO; |
| 622 | } |
| 623 | spin_unlock(&ch_devlist_lock); |
| 624 | |
| 625 | file->private_data = ch; |
| 626 | return 0; |
| 627 | } |
| 628 | |
| 629 | static int |
| 630 | ch_checkrange(scsi_changer *ch, unsigned int type, unsigned int unit) |
| 631 | { |
| 632 | if (type >= CH_TYPES || unit >= ch->counts[type]) |
| 633 | return -1; |
| 634 | return 0; |
| 635 | } |
| 636 | |
| 637 | static int ch_ioctl(struct inode * inode, struct file * file, |
| 638 | unsigned int cmd, unsigned long arg) |
| 639 | { |
| 640 | scsi_changer *ch = file->private_data; |
| 641 | int retval; |
| 642 | |
| 643 | switch (cmd) { |
| 644 | case CHIOGPARAMS: |
| 645 | { |
| 646 | struct changer_params params; |
| 647 | |
| 648 | params.cp_curpicker = 0; |
| 649 | params.cp_npickers = ch->counts[CHET_MT]; |
| 650 | params.cp_nslots = ch->counts[CHET_ST]; |
| 651 | params.cp_nportals = ch->counts[CHET_IE]; |
| 652 | params.cp_ndrives = ch->counts[CHET_DT]; |
| 653 | |
| 654 | if (copy_to_user((void *) arg, ¶ms, sizeof(params))) |
| 655 | return -EFAULT; |
| 656 | return 0; |
| 657 | } |
| 658 | case CHIOGVPARAMS: |
| 659 | { |
| 660 | struct changer_vendor_params vparams; |
| 661 | |
| 662 | memset(&vparams,0,sizeof(vparams)); |
| 663 | if (ch->counts[CHET_V1]) { |
| 664 | vparams.cvp_n1 = ch->counts[CHET_V1]; |
| 665 | strncpy(vparams.cvp_label1,vendor_labels[0],16); |
| 666 | } |
| 667 | if (ch->counts[CHET_V2]) { |
| 668 | vparams.cvp_n2 = ch->counts[CHET_V2]; |
| 669 | strncpy(vparams.cvp_label2,vendor_labels[1],16); |
| 670 | } |
| 671 | if (ch->counts[CHET_V3]) { |
| 672 | vparams.cvp_n3 = ch->counts[CHET_V3]; |
| 673 | strncpy(vparams.cvp_label3,vendor_labels[2],16); |
| 674 | } |
| 675 | if (ch->counts[CHET_V4]) { |
| 676 | vparams.cvp_n4 = ch->counts[CHET_V4]; |
| 677 | strncpy(vparams.cvp_label4,vendor_labels[3],16); |
| 678 | } |
| 679 | if (copy_to_user((void *) arg, &vparams, sizeof(vparams))) |
| 680 | return -EFAULT; |
| 681 | return 0; |
| 682 | } |
| 683 | |
| 684 | case CHIOPOSITION: |
| 685 | { |
| 686 | struct changer_position pos; |
| 687 | |
| 688 | if (copy_from_user(&pos, (void*)arg, sizeof (pos))) |
| 689 | return -EFAULT; |
| 690 | |
| 691 | if (0 != ch_checkrange(ch, pos.cp_type, pos.cp_unit)) { |
| 692 | dprintk("CHIOPOSITION: invalid parameter\n"); |
| 693 | return -EBADSLT; |
| 694 | } |
| 695 | down(&ch->lock); |
| 696 | retval = ch_position(ch,0, |
| 697 | ch->firsts[pos.cp_type] + pos.cp_unit, |
| 698 | pos.cp_flags & CP_INVERT); |
| 699 | up(&ch->lock); |
| 700 | return retval; |
| 701 | } |
| 702 | |
| 703 | case CHIOMOVE: |
| 704 | { |
| 705 | struct changer_move mv; |
| 706 | |
| 707 | if (copy_from_user(&mv, (void*)arg, sizeof (mv))) |
| 708 | return -EFAULT; |
| 709 | |
| 710 | if (0 != ch_checkrange(ch, mv.cm_fromtype, mv.cm_fromunit) || |
| 711 | 0 != ch_checkrange(ch, mv.cm_totype, mv.cm_tounit )) { |
| 712 | dprintk("CHIOMOVE: invalid parameter\n"); |
| 713 | return -EBADSLT; |
| 714 | } |
| 715 | |
| 716 | down(&ch->lock); |
| 717 | retval = ch_move(ch,0, |
| 718 | ch->firsts[mv.cm_fromtype] + mv.cm_fromunit, |
| 719 | ch->firsts[mv.cm_totype] + mv.cm_tounit, |
| 720 | mv.cm_flags & CM_INVERT); |
| 721 | up(&ch->lock); |
| 722 | return retval; |
| 723 | } |
| 724 | |
| 725 | case CHIOEXCHANGE: |
| 726 | { |
| 727 | struct changer_exchange mv; |
| 728 | |
| 729 | if (copy_from_user(&mv, (void*)arg, sizeof (mv))) |
| 730 | return -EFAULT; |
| 731 | |
| 732 | if (0 != ch_checkrange(ch, mv.ce_srctype, mv.ce_srcunit ) || |
| 733 | 0 != ch_checkrange(ch, mv.ce_fdsttype, mv.ce_fdstunit) || |
| 734 | 0 != ch_checkrange(ch, mv.ce_sdsttype, mv.ce_sdstunit)) { |
| 735 | dprintk("CHIOEXCHANGE: invalid parameter\n"); |
| 736 | return -EBADSLT; |
| 737 | } |
| 738 | |
| 739 | down(&ch->lock); |
| 740 | retval = ch_exchange |
| 741 | (ch,0, |
| 742 | ch->firsts[mv.ce_srctype] + mv.ce_srcunit, |
| 743 | ch->firsts[mv.ce_fdsttype] + mv.ce_fdstunit, |
| 744 | ch->firsts[mv.ce_sdsttype] + mv.ce_sdstunit, |
| 745 | mv.ce_flags & CE_INVERT1, mv.ce_flags & CE_INVERT2); |
| 746 | up(&ch->lock); |
| 747 | return retval; |
| 748 | } |
| 749 | |
| 750 | case CHIOGSTATUS: |
| 751 | { |
| 752 | struct changer_element_status ces; |
| 753 | |
| 754 | if (copy_from_user(&ces, (void*)arg, sizeof (ces))) |
| 755 | return -EFAULT; |
| 756 | if (ces.ces_type < 0 || ces.ces_type >= CH_TYPES) |
| 757 | return -EINVAL; |
| 758 | |
| 759 | return ch_gstatus(ch, ces.ces_type, ces.ces_data); |
| 760 | } |
| 761 | |
| 762 | case CHIOGELEM: |
| 763 | { |
| 764 | struct changer_get_element cge; |
| 765 | u_char cmd[12]; |
| 766 | u_char *buffer; |
| 767 | unsigned int elem; |
| 768 | int result,i; |
| 769 | |
| 770 | if (copy_from_user(&cge, (void*)arg, sizeof (cge))) |
| 771 | return -EFAULT; |
| 772 | |
| 773 | if (0 != ch_checkrange(ch, cge.cge_type, cge.cge_unit)) |
| 774 | return -EINVAL; |
| 775 | elem = ch->firsts[cge.cge_type] + cge.cge_unit; |
| 776 | |
| 777 | buffer = kmalloc(512, GFP_KERNEL | GFP_DMA); |
| 778 | if (!buffer) |
| 779 | return -ENOMEM; |
| 780 | down(&ch->lock); |
| 781 | |
| 782 | voltag_retry: |
| 783 | memset(cmd,0,sizeof(cmd)); |
| 784 | cmd[0] = READ_ELEMENT_STATUS; |
| 785 | cmd[1] = (ch->device->lun << 5) | |
| 786 | (ch->voltags ? 0x10 : 0) | |
| 787 | ch_elem_to_typecode(ch,elem); |
| 788 | cmd[2] = (elem >> 8) & 0xff; |
| 789 | cmd[3] = elem & 0xff; |
| 790 | cmd[5] = 1; |
| 791 | cmd[9] = 255; |
| 792 | |
| 793 | if (0 == (result = ch_do_scsi(ch, cmd, buffer, 256, DMA_FROM_DEVICE))) { |
| 794 | cge.cge_status = buffer[18]; |
| 795 | cge.cge_flags = 0; |
| 796 | if (buffer[18] & CESTATUS_EXCEPT) { |
| 797 | cge.cge_errno = EIO; |
| 798 | } |
| 799 | if (buffer[25] & 0x80) { |
| 800 | cge.cge_flags |= CGE_SRC; |
| 801 | if (buffer[25] & 0x40) |
| 802 | cge.cge_flags |= CGE_INVERT; |
| 803 | elem = (buffer[26]<<8) | buffer[27]; |
| 804 | for (i = 0; i < 4; i++) { |
| 805 | if (elem >= ch->firsts[i] && |
| 806 | elem < ch->firsts[i] + ch->counts[i]) { |
| 807 | cge.cge_srctype = i; |
| 808 | cge.cge_srcunit = elem-ch->firsts[i]; |
| 809 | } |
| 810 | } |
| 811 | } |
| 812 | if ((buffer[22] & 0x30) == 0x30) { |
| 813 | cge.cge_flags |= CGE_IDLUN; |
| 814 | cge.cge_id = buffer[23]; |
| 815 | cge.cge_lun = buffer[22] & 7; |
| 816 | } |
| 817 | if (buffer[9] & 0x80) { |
| 818 | cge.cge_flags |= CGE_PVOLTAG; |
| 819 | memcpy(cge.cge_pvoltag,buffer+28,36); |
| 820 | } |
| 821 | if (buffer[9] & 0x40) { |
| 822 | cge.cge_flags |= CGE_AVOLTAG; |
| 823 | memcpy(cge.cge_avoltag,buffer+64,36); |
| 824 | } |
| 825 | } else if (ch->voltags) { |
| 826 | ch->voltags = 0; |
| 827 | vprintk("device has no volume tag support\n"); |
| 828 | goto voltag_retry; |
| 829 | } |
| 830 | kfree(buffer); |
| 831 | up(&ch->lock); |
| 832 | |
| 833 | if (copy_to_user((void*)arg, &cge, sizeof (cge))) |
| 834 | return -EFAULT; |
| 835 | return result; |
| 836 | } |
| 837 | |
| 838 | case CHIOINITELEM: |
| 839 | { |
| 840 | down(&ch->lock); |
| 841 | retval = ch_init_elem(ch); |
| 842 | up(&ch->lock); |
| 843 | return retval; |
| 844 | } |
| 845 | |
| 846 | case CHIOSVOLTAG: |
| 847 | { |
| 848 | struct changer_set_voltag csv; |
| 849 | int elem; |
| 850 | |
| 851 | if (copy_from_user(&csv, (void*)arg, sizeof(csv))) |
| 852 | return -EFAULT; |
| 853 | |
| 854 | if (0 != ch_checkrange(ch, csv.csv_type, csv.csv_unit)) { |
| 855 | dprintk("CHIOSVOLTAG: invalid parameter\n"); |
| 856 | return -EBADSLT; |
| 857 | } |
| 858 | elem = ch->firsts[csv.csv_type] + csv.csv_unit; |
| 859 | down(&ch->lock); |
| 860 | retval = ch_set_voltag(ch, elem, |
| 861 | csv.csv_flags & CSV_AVOLTAG, |
| 862 | csv.csv_flags & CSV_CLEARTAG, |
| 863 | csv.csv_voltag); |
| 864 | up(&ch->lock); |
| 865 | return retval; |
| 866 | } |
| 867 | |
| 868 | default: |
| 869 | return scsi_ioctl(ch->device, cmd, (void*)arg); |
| 870 | |
| 871 | } |
| 872 | } |
| 873 | |
| 874 | #ifdef CONFIG_COMPAT |
| 875 | |
| 876 | struct changer_element_status32 { |
| 877 | int ces_type; |
| 878 | compat_uptr_t ces_data; |
| 879 | }; |
| 880 | #define CHIOGSTATUS32 _IOW('c', 8,struct changer_element_status32) |
| 881 | |
| 882 | static long ch_ioctl_compat(struct file * file, |
| 883 | unsigned int cmd, unsigned long arg) |
| 884 | { |
| 885 | scsi_changer *ch = file->private_data; |
| 886 | |
| 887 | switch (cmd) { |
| 888 | case CHIOGPARAMS: |
| 889 | case CHIOGVPARAMS: |
| 890 | case CHIOPOSITION: |
| 891 | case CHIOMOVE: |
| 892 | case CHIOEXCHANGE: |
| 893 | case CHIOGELEM: |
| 894 | case CHIOINITELEM: |
| 895 | case CHIOSVOLTAG: |
| 896 | /* compatible */ |
| 897 | return ch_ioctl(NULL /* inode, unused */, |
| 898 | file, cmd, arg); |
| 899 | case CHIOGSTATUS32: |
| 900 | { |
| 901 | struct changer_element_status32 ces32; |
| 902 | unsigned char *data; |
| 903 | |
| 904 | if (copy_from_user(&ces32, (void*)arg, sizeof (ces32))) |
| 905 | return -EFAULT; |
| 906 | if (ces32.ces_type < 0 || ces32.ces_type >= CH_TYPES) |
| 907 | return -EINVAL; |
| 908 | |
| 909 | data = compat_ptr(ces32.ces_data); |
| 910 | return ch_gstatus(ch, ces32.ces_type, data); |
| 911 | } |
| 912 | default: |
| 913 | // return scsi_ioctl_compat(ch->device, cmd, (void*)arg); |
| 914 | return -ENOIOCTLCMD; |
| 915 | |
| 916 | } |
| 917 | } |
| 918 | #endif |
| 919 | |
| 920 | /* ------------------------------------------------------------------------ */ |
| 921 | |
| 922 | static int ch_probe(struct device *dev) |
| 923 | { |
| 924 | struct scsi_device *sd = to_scsi_device(dev); |
| 925 | scsi_changer *ch; |
| 926 | |
| 927 | if (sd->type != TYPE_MEDIUM_CHANGER) |
| 928 | return -ENODEV; |
| 929 | |
| 930 | ch = kmalloc(sizeof(*ch), GFP_KERNEL); |
| 931 | if (NULL == ch) |
| 932 | return -ENOMEM; |
| 933 | |
| 934 | memset(ch,0,sizeof(*ch)); |
| 935 | ch->minor = ch_devcount; |
| 936 | sprintf(ch->name,"ch%d",ch->minor); |
| 937 | init_MUTEX(&ch->lock); |
| 938 | ch->device = sd; |
| 939 | ch_readconfig(ch); |
| 940 | if (init) |
| 941 | ch_init_elem(ch); |
| 942 | |
| 943 | devfs_mk_cdev(MKDEV(SCSI_CHANGER_MAJOR,ch->minor), |
| 944 | S_IFCHR | S_IRUGO | S_IWUGO, ch->name); |
Gerd Knorr | 21feb5c | 2005-05-12 10:25:26 +0200 | [diff] [blame] | 945 | class_device_create(ch_sysfs_class, |
| 946 | MKDEV(SCSI_CHANGER_MAJOR,ch->minor), |
| 947 | dev, "s%s", ch->name); |
Gerd Knorr | daa6eda | 2005-05-10 10:59:13 +0200 | [diff] [blame] | 948 | |
| 949 | printk(KERN_INFO "Attached scsi changer %s " |
| 950 | "at scsi%d, channel %d, id %d, lun %d\n", |
| 951 | ch->name, sd->host->host_no, sd->channel, sd->id, sd->lun); |
| 952 | |
| 953 | spin_lock(&ch_devlist_lock); |
| 954 | list_add_tail(&ch->list,&ch_devlist); |
| 955 | ch_devcount++; |
| 956 | spin_unlock(&ch_devlist_lock); |
| 957 | return 0; |
| 958 | } |
| 959 | |
| 960 | static int ch_remove(struct device *dev) |
| 961 | { |
| 962 | struct scsi_device *sd = to_scsi_device(dev); |
| 963 | scsi_changer *tmp, *ch; |
| 964 | |
| 965 | spin_lock(&ch_devlist_lock); |
| 966 | ch = NULL; |
| 967 | list_for_each_entry(tmp,&ch_devlist,list) { |
| 968 | if (tmp->device == sd) |
| 969 | ch = tmp; |
| 970 | } |
| 971 | BUG_ON(NULL == ch); |
| 972 | list_del(&ch->list); |
| 973 | spin_unlock(&ch_devlist_lock); |
| 974 | |
Gerd Knorr | 21feb5c | 2005-05-12 10:25:26 +0200 | [diff] [blame] | 975 | class_device_destroy(ch_sysfs_class, |
| 976 | MKDEV(SCSI_CHANGER_MAJOR,ch->minor)); |
Gerd Knorr | daa6eda | 2005-05-10 10:59:13 +0200 | [diff] [blame] | 977 | devfs_remove(ch->name); |
| 978 | kfree(ch->dt); |
| 979 | kfree(ch); |
| 980 | ch_devcount--; |
| 981 | return 0; |
| 982 | } |
| 983 | |
| 984 | static int __init init_ch_module(void) |
| 985 | { |
| 986 | int rc; |
| 987 | |
| 988 | printk(KERN_INFO "SCSI Media Changer driver v" VERSION " \n"); |
Gerd Knorr | 21feb5c | 2005-05-12 10:25:26 +0200 | [diff] [blame] | 989 | ch_sysfs_class = class_create(THIS_MODULE, "scsi_changer"); |
Gerd Knorr | daa6eda | 2005-05-10 10:59:13 +0200 | [diff] [blame] | 990 | if (IS_ERR(ch_sysfs_class)) { |
| 991 | rc = PTR_ERR(ch_sysfs_class); |
| 992 | return rc; |
| 993 | } |
| 994 | rc = register_chrdev(SCSI_CHANGER_MAJOR,"ch",&changer_fops); |
| 995 | if (rc < 0) { |
| 996 | printk("Unable to get major %d for SCSI-Changer\n", |
| 997 | SCSI_CHANGER_MAJOR); |
| 998 | goto fail1; |
| 999 | } |
| 1000 | rc = scsi_register_driver(&ch_template.gendrv); |
| 1001 | if (rc < 0) |
| 1002 | goto fail2; |
| 1003 | return 0; |
| 1004 | |
| 1005 | fail2: |
| 1006 | unregister_chrdev(SCSI_CHANGER_MAJOR, "ch"); |
| 1007 | fail1: |
Gerd Knorr | 21feb5c | 2005-05-12 10:25:26 +0200 | [diff] [blame] | 1008 | class_destroy(ch_sysfs_class); |
Gerd Knorr | daa6eda | 2005-05-10 10:59:13 +0200 | [diff] [blame] | 1009 | return rc; |
| 1010 | } |
| 1011 | |
| 1012 | static void __exit exit_ch_module(void) |
| 1013 | { |
| 1014 | scsi_unregister_driver(&ch_template.gendrv); |
| 1015 | unregister_chrdev(SCSI_CHANGER_MAJOR, "ch"); |
Gerd Knorr | 21feb5c | 2005-05-12 10:25:26 +0200 | [diff] [blame] | 1016 | class_destroy(ch_sysfs_class); |
Gerd Knorr | daa6eda | 2005-05-10 10:59:13 +0200 | [diff] [blame] | 1017 | } |
| 1018 | |
| 1019 | module_init(init_ch_module); |
| 1020 | module_exit(exit_ch_module); |
| 1021 | |
| 1022 | /* |
| 1023 | * Local variables: |
| 1024 | * c-basic-offset: 8 |
| 1025 | * End: |
| 1026 | */ |