Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * standard tape device functions for ibm tapes. |
| 3 | * |
| 4 | * S390 and zSeries version |
Heiko Carstens | a53c8fa | 2012-07-20 11:15:04 +0200 | [diff] [blame] | 5 | * Copyright IBM Corp. 2001, 2002 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | * Author(s): Carsten Otte <cotte@de.ibm.com> |
| 7 | * Michael Holzheu <holzheu@de.ibm.com> |
| 8 | * Tuan Ngo-Anh <ngoanh@de.ibm.com> |
| 9 | * Martin Schwidefsky <schwidefsky@de.ibm.com> |
| 10 | * Stefan Bader <shbader@de.ibm.com> |
| 11 | */ |
| 12 | |
Michael Holzheu | bb50991 | 2009-12-18 17:43:21 +0100 | [diff] [blame] | 13 | #define KMSG_COMPONENT "tape" |
| 14 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt |
| 15 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | #include <linux/stddef.h> |
| 17 | #include <linux/kernel.h> |
| 18 | #include <linux/bio.h> |
| 19 | #include <linux/timer.h> |
| 20 | |
| 21 | #include <asm/types.h> |
| 22 | #include <asm/idals.h> |
| 23 | #include <asm/ebcdic.h> |
| 24 | #include <asm/tape390.h> |
| 25 | |
| 26 | #define TAPE_DBF_AREA tape_core_dbf |
| 27 | |
| 28 | #include "tape.h" |
| 29 | #include "tape_std.h" |
| 30 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | /* |
| 32 | * tape_std_assign |
| 33 | */ |
| 34 | static void |
| 35 | tape_std_assign_timeout(unsigned long data) |
| 36 | { |
| 37 | struct tape_request * request; |
| 38 | struct tape_device * device; |
Michael Holzheu | 5f38433 | 2006-03-24 03:15:28 -0800 | [diff] [blame] | 39 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
| 41 | request = (struct tape_request *) data; |
Stoyan Gaydarov | 6aa0d3a | 2009-03-26 15:24:47 +0100 | [diff] [blame] | 42 | device = request->device; |
| 43 | BUG_ON(!device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | |
Michael Holzheu | 5f38433 | 2006-03-24 03:15:28 -0800 | [diff] [blame] | 45 | DBF_EVENT(3, "%08x: Assignment timeout. Device busy.\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | device->cdev_id); |
Michael Holzheu | 5f38433 | 2006-03-24 03:15:28 -0800 | [diff] [blame] | 47 | rc = tape_cancel_io(device, request); |
| 48 | if(rc) |
Sebastian Ott | f2166bb | 2010-10-29 16:50:44 +0200 | [diff] [blame] | 49 | DBF_EVENT(3, "(%08x): Assign timeout: Cancel failed with rc = " |
| 50 | "%i\n", device->cdev_id, rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | } |
| 52 | |
| 53 | int |
| 54 | tape_std_assign(struct tape_device *device) |
| 55 | { |
| 56 | int rc; |
| 57 | struct timer_list timeout; |
| 58 | struct tape_request *request; |
| 59 | |
| 60 | request = tape_alloc_request(2, 11); |
| 61 | if (IS_ERR(request)) |
| 62 | return PTR_ERR(request); |
| 63 | |
| 64 | request->op = TO_ASSIGN; |
| 65 | tape_ccw_cc(request->cpaddr, ASSIGN, 11, request->cpdata); |
| 66 | tape_ccw_end(request->cpaddr + 1, NOP, 0, NULL); |
| 67 | |
| 68 | /* |
| 69 | * The assign command sometimes blocks if the device is assigned |
| 70 | * to another host (actually this shouldn't happen but it does). |
| 71 | * So we set up a timeout for this call. |
| 72 | */ |
Frank Munzert | 6292b9e | 2009-09-11 10:28:39 +0200 | [diff] [blame] | 73 | init_timer_on_stack(&timeout); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | timeout.function = tape_std_assign_timeout; |
| 75 | timeout.data = (unsigned long) request; |
| 76 | timeout.expires = jiffies + 2 * HZ; |
| 77 | add_timer(&timeout); |
| 78 | |
| 79 | rc = tape_do_io_interruptible(device, request); |
| 80 | |
| 81 | del_timer(&timeout); |
| 82 | |
| 83 | if (rc != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | DBF_EVENT(3, "%08x: assign failed - device might be busy\n", |
| 85 | device->cdev_id); |
| 86 | } else { |
| 87 | DBF_EVENT(3, "%08x: Tape assigned\n", device->cdev_id); |
| 88 | } |
| 89 | tape_free_request(request); |
| 90 | return rc; |
| 91 | } |
| 92 | |
| 93 | /* |
| 94 | * tape_std_unassign |
| 95 | */ |
| 96 | int |
| 97 | tape_std_unassign (struct tape_device *device) |
| 98 | { |
| 99 | int rc; |
| 100 | struct tape_request *request; |
| 101 | |
| 102 | if (device->tape_state == TS_NOT_OPER) { |
| 103 | DBF_EVENT(3, "(%08x): Can't unassign device\n", |
| 104 | device->cdev_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | return -EIO; |
| 106 | } |
| 107 | |
| 108 | request = tape_alloc_request(2, 11); |
| 109 | if (IS_ERR(request)) |
| 110 | return PTR_ERR(request); |
| 111 | |
| 112 | request->op = TO_UNASSIGN; |
| 113 | tape_ccw_cc(request->cpaddr, UNASSIGN, 11, request->cpdata); |
| 114 | tape_ccw_end(request->cpaddr + 1, NOP, 0, NULL); |
| 115 | |
| 116 | if ((rc = tape_do_io(device, request)) != 0) { |
| 117 | DBF_EVENT(3, "%08x: Unassign failed\n", device->cdev_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | } else { |
| 119 | DBF_EVENT(3, "%08x: Tape unassigned\n", device->cdev_id); |
| 120 | } |
| 121 | tape_free_request(request); |
| 122 | return rc; |
| 123 | } |
| 124 | |
| 125 | /* |
| 126 | * TAPE390_DISPLAY: Show a string on the tape display. |
| 127 | */ |
| 128 | int |
| 129 | tape_std_display(struct tape_device *device, struct display_struct *disp) |
| 130 | { |
| 131 | struct tape_request *request; |
| 132 | int rc; |
| 133 | |
| 134 | request = tape_alloc_request(2, 17); |
| 135 | if (IS_ERR(request)) { |
| 136 | DBF_EVENT(3, "TAPE: load display failed\n"); |
| 137 | return PTR_ERR(request); |
| 138 | } |
| 139 | request->op = TO_DIS; |
| 140 | |
| 141 | *(unsigned char *) request->cpdata = disp->cntrl; |
| 142 | DBF_EVENT(5, "TAPE: display cntrl=%04x\n", disp->cntrl); |
| 143 | memcpy(((unsigned char *) request->cpdata) + 1, disp->message1, 8); |
| 144 | memcpy(((unsigned char *) request->cpdata) + 9, disp->message2, 8); |
| 145 | ASCEBC(((unsigned char*) request->cpdata) + 1, 16); |
| 146 | |
| 147 | tape_ccw_cc(request->cpaddr, LOAD_DISPLAY, 17, request->cpdata); |
| 148 | tape_ccw_end(request->cpaddr + 1, NOP, 0, NULL); |
| 149 | |
| 150 | rc = tape_do_io_interruptible(device, request); |
| 151 | tape_free_request(request); |
| 152 | return rc; |
| 153 | } |
| 154 | |
| 155 | /* |
| 156 | * Read block id. |
| 157 | */ |
| 158 | int |
| 159 | tape_std_read_block_id(struct tape_device *device, __u64 *id) |
| 160 | { |
| 161 | struct tape_request *request; |
| 162 | int rc; |
| 163 | |
| 164 | request = tape_alloc_request(3, 8); |
| 165 | if (IS_ERR(request)) |
| 166 | return PTR_ERR(request); |
| 167 | request->op = TO_RBI; |
| 168 | /* setup ccws */ |
| 169 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); |
| 170 | tape_ccw_cc(request->cpaddr + 1, READ_BLOCK_ID, 8, request->cpdata); |
| 171 | tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL); |
| 172 | /* execute it */ |
| 173 | rc = tape_do_io(device, request); |
| 174 | if (rc == 0) |
| 175 | /* Get result from read buffer. */ |
| 176 | *id = *(__u64 *) request->cpdata; |
| 177 | tape_free_request(request); |
| 178 | return rc; |
| 179 | } |
| 180 | |
| 181 | int |
| 182 | tape_std_terminate_write(struct tape_device *device) |
| 183 | { |
| 184 | int rc; |
| 185 | |
| 186 | if(device->required_tapemarks == 0) |
| 187 | return 0; |
| 188 | |
| 189 | DBF_LH(5, "tape%d: terminate write %dxEOF\n", device->first_minor, |
| 190 | device->required_tapemarks); |
| 191 | |
| 192 | rc = tape_mtop(device, MTWEOF, device->required_tapemarks); |
| 193 | if (rc) |
| 194 | return rc; |
| 195 | |
| 196 | device->required_tapemarks = 0; |
| 197 | return tape_mtop(device, MTBSR, 1); |
| 198 | } |
| 199 | |
| 200 | /* |
| 201 | * MTLOAD: Loads the tape. |
| 202 | * The default implementation just wait until the tape medium state changes |
| 203 | * to MS_LOADED. |
| 204 | */ |
| 205 | int |
| 206 | tape_std_mtload(struct tape_device *device, int count) |
| 207 | { |
| 208 | return wait_event_interruptible(device->state_change_wq, |
| 209 | (device->medium_state == MS_LOADED)); |
| 210 | } |
| 211 | |
| 212 | /* |
| 213 | * MTSETBLK: Set block size. |
| 214 | */ |
| 215 | int |
| 216 | tape_std_mtsetblk(struct tape_device *device, int count) |
| 217 | { |
| 218 | struct idal_buffer *new; |
| 219 | |
| 220 | DBF_LH(6, "tape_std_mtsetblk(%d)\n", count); |
| 221 | if (count <= 0) { |
| 222 | /* |
| 223 | * Just set block_size to 0. tapechar_read/tapechar_write |
| 224 | * will realloc the idal buffer if a bigger one than the |
| 225 | * current is needed. |
| 226 | */ |
| 227 | device->char_data.block_size = 0; |
| 228 | return 0; |
| 229 | } |
| 230 | if (device->char_data.idal_buf != NULL && |
| 231 | device->char_data.idal_buf->size == count) |
| 232 | /* We already have a idal buffer of that size. */ |
| 233 | return 0; |
| 234 | |
| 235 | if (count > MAX_BLOCKSIZE) { |
| 236 | DBF_EVENT(3, "Invalid block size (%d > %d) given.\n", |
| 237 | count, MAX_BLOCKSIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | return -EINVAL; |
| 239 | } |
| 240 | |
| 241 | /* Allocate a new idal buffer. */ |
| 242 | new = idal_buffer_alloc(count, 0); |
Julien Brunel | 0983e56 | 2008-08-21 19:46:30 +0200 | [diff] [blame] | 243 | if (IS_ERR(new)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | return -ENOMEM; |
| 245 | if (device->char_data.idal_buf != NULL) |
| 246 | idal_buffer_free(device->char_data.idal_buf); |
| 247 | device->char_data.idal_buf = new; |
| 248 | device->char_data.block_size = count; |
| 249 | |
| 250 | DBF_LH(6, "new blocksize is %d\n", device->char_data.block_size); |
| 251 | |
| 252 | return 0; |
| 253 | } |
| 254 | |
| 255 | /* |
| 256 | * MTRESET: Set block size to 0. |
| 257 | */ |
| 258 | int |
| 259 | tape_std_mtreset(struct tape_device *device, int count) |
| 260 | { |
| 261 | DBF_EVENT(6, "TCHAR:devreset:\n"); |
| 262 | device->char_data.block_size = 0; |
| 263 | return 0; |
| 264 | } |
| 265 | |
| 266 | /* |
| 267 | * MTFSF: Forward space over 'count' file marks. The tape is positioned |
| 268 | * at the EOT (End of Tape) side of the file mark. |
| 269 | */ |
| 270 | int |
| 271 | tape_std_mtfsf(struct tape_device *device, int mt_count) |
| 272 | { |
| 273 | struct tape_request *request; |
| 274 | struct ccw1 *ccw; |
| 275 | |
| 276 | request = tape_alloc_request(mt_count + 2, 0); |
| 277 | if (IS_ERR(request)) |
| 278 | return PTR_ERR(request); |
| 279 | request->op = TO_FSF; |
| 280 | /* setup ccws */ |
| 281 | ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, |
| 282 | device->modeset_byte); |
| 283 | ccw = tape_ccw_repeat(ccw, FORSPACEFILE, mt_count); |
| 284 | ccw = tape_ccw_end(ccw, NOP, 0, NULL); |
| 285 | |
| 286 | /* execute it */ |
| 287 | return tape_do_io_free(device, request); |
| 288 | } |
| 289 | |
| 290 | /* |
| 291 | * MTFSR: Forward space over 'count' tape blocks (blocksize is set |
| 292 | * via MTSETBLK. |
| 293 | */ |
| 294 | int |
| 295 | tape_std_mtfsr(struct tape_device *device, int mt_count) |
| 296 | { |
| 297 | struct tape_request *request; |
| 298 | struct ccw1 *ccw; |
| 299 | int rc; |
| 300 | |
| 301 | request = tape_alloc_request(mt_count + 2, 0); |
| 302 | if (IS_ERR(request)) |
| 303 | return PTR_ERR(request); |
| 304 | request->op = TO_FSB; |
| 305 | /* setup ccws */ |
| 306 | ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, |
| 307 | device->modeset_byte); |
| 308 | ccw = tape_ccw_repeat(ccw, FORSPACEBLOCK, mt_count); |
| 309 | ccw = tape_ccw_end(ccw, NOP, 0, NULL); |
| 310 | |
| 311 | /* execute it */ |
| 312 | rc = tape_do_io(device, request); |
| 313 | if (rc == 0 && request->rescnt > 0) { |
| 314 | DBF_LH(3, "FSR over tapemark\n"); |
| 315 | rc = 1; |
| 316 | } |
| 317 | tape_free_request(request); |
| 318 | |
| 319 | return rc; |
| 320 | } |
| 321 | |
| 322 | /* |
| 323 | * MTBSR: Backward space over 'count' tape blocks. |
| 324 | * (blocksize is set via MTSETBLK. |
| 325 | */ |
| 326 | int |
| 327 | tape_std_mtbsr(struct tape_device *device, int mt_count) |
| 328 | { |
| 329 | struct tape_request *request; |
| 330 | struct ccw1 *ccw; |
| 331 | int rc; |
| 332 | |
| 333 | request = tape_alloc_request(mt_count + 2, 0); |
| 334 | if (IS_ERR(request)) |
| 335 | return PTR_ERR(request); |
| 336 | request->op = TO_BSB; |
| 337 | /* setup ccws */ |
| 338 | ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, |
| 339 | device->modeset_byte); |
| 340 | ccw = tape_ccw_repeat(ccw, BACKSPACEBLOCK, mt_count); |
| 341 | ccw = tape_ccw_end(ccw, NOP, 0, NULL); |
| 342 | |
| 343 | /* execute it */ |
| 344 | rc = tape_do_io(device, request); |
| 345 | if (rc == 0 && request->rescnt > 0) { |
| 346 | DBF_LH(3, "BSR over tapemark\n"); |
| 347 | rc = 1; |
| 348 | } |
| 349 | tape_free_request(request); |
| 350 | |
| 351 | return rc; |
| 352 | } |
| 353 | |
| 354 | /* |
| 355 | * MTWEOF: Write 'count' file marks at the current position. |
| 356 | */ |
| 357 | int |
| 358 | tape_std_mtweof(struct tape_device *device, int mt_count) |
| 359 | { |
| 360 | struct tape_request *request; |
| 361 | struct ccw1 *ccw; |
| 362 | |
| 363 | request = tape_alloc_request(mt_count + 2, 0); |
| 364 | if (IS_ERR(request)) |
| 365 | return PTR_ERR(request); |
| 366 | request->op = TO_WTM; |
| 367 | /* setup ccws */ |
| 368 | ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, |
| 369 | device->modeset_byte); |
| 370 | ccw = tape_ccw_repeat(ccw, WRITETAPEMARK, mt_count); |
| 371 | ccw = tape_ccw_end(ccw, NOP, 0, NULL); |
| 372 | |
| 373 | /* execute it */ |
| 374 | return tape_do_io_free(device, request); |
| 375 | } |
| 376 | |
| 377 | /* |
| 378 | * MTBSFM: Backward space over 'count' file marks. |
| 379 | * The tape is positioned at the BOT (Begin Of Tape) side of the |
| 380 | * last skipped file mark. |
| 381 | */ |
| 382 | int |
| 383 | tape_std_mtbsfm(struct tape_device *device, int mt_count) |
| 384 | { |
| 385 | struct tape_request *request; |
| 386 | struct ccw1 *ccw; |
| 387 | |
| 388 | request = tape_alloc_request(mt_count + 2, 0); |
| 389 | if (IS_ERR(request)) |
| 390 | return PTR_ERR(request); |
| 391 | request->op = TO_BSF; |
| 392 | /* setup ccws */ |
| 393 | ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, |
| 394 | device->modeset_byte); |
| 395 | ccw = tape_ccw_repeat(ccw, BACKSPACEFILE, mt_count); |
| 396 | ccw = tape_ccw_end(ccw, NOP, 0, NULL); |
| 397 | |
| 398 | /* execute it */ |
| 399 | return tape_do_io_free(device, request); |
| 400 | } |
| 401 | |
| 402 | /* |
| 403 | * MTBSF: Backward space over 'count' file marks. The tape is positioned at |
| 404 | * the EOT (End of Tape) side of the last skipped file mark. |
| 405 | */ |
| 406 | int |
| 407 | tape_std_mtbsf(struct tape_device *device, int mt_count) |
| 408 | { |
| 409 | struct tape_request *request; |
| 410 | struct ccw1 *ccw; |
| 411 | int rc; |
| 412 | |
| 413 | request = tape_alloc_request(mt_count + 2, 0); |
| 414 | if (IS_ERR(request)) |
| 415 | return PTR_ERR(request); |
| 416 | request->op = TO_BSF; |
| 417 | /* setup ccws */ |
| 418 | ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, |
| 419 | device->modeset_byte); |
| 420 | ccw = tape_ccw_repeat(ccw, BACKSPACEFILE, mt_count); |
| 421 | ccw = tape_ccw_end(ccw, NOP, 0, NULL); |
| 422 | /* execute it */ |
| 423 | rc = tape_do_io_free(device, request); |
| 424 | if (rc == 0) { |
| 425 | rc = tape_mtop(device, MTFSR, 1); |
| 426 | if (rc > 0) |
| 427 | rc = 0; |
| 428 | } |
| 429 | return rc; |
| 430 | } |
| 431 | |
| 432 | /* |
| 433 | * MTFSFM: Forward space over 'count' file marks. |
| 434 | * The tape is positioned at the BOT (Begin Of Tape) side |
| 435 | * of the last skipped file mark. |
| 436 | */ |
| 437 | int |
| 438 | tape_std_mtfsfm(struct tape_device *device, int mt_count) |
| 439 | { |
| 440 | struct tape_request *request; |
| 441 | struct ccw1 *ccw; |
| 442 | int rc; |
| 443 | |
| 444 | request = tape_alloc_request(mt_count + 2, 0); |
| 445 | if (IS_ERR(request)) |
| 446 | return PTR_ERR(request); |
| 447 | request->op = TO_FSF; |
| 448 | /* setup ccws */ |
| 449 | ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, |
| 450 | device->modeset_byte); |
| 451 | ccw = tape_ccw_repeat(ccw, FORSPACEFILE, mt_count); |
| 452 | ccw = tape_ccw_end(ccw, NOP, 0, NULL); |
| 453 | /* execute it */ |
| 454 | rc = tape_do_io_free(device, request); |
| 455 | if (rc == 0) { |
| 456 | rc = tape_mtop(device, MTBSR, 1); |
| 457 | if (rc > 0) |
| 458 | rc = 0; |
| 459 | } |
| 460 | |
| 461 | return rc; |
| 462 | } |
| 463 | |
| 464 | /* |
| 465 | * MTREW: Rewind the tape. |
| 466 | */ |
| 467 | int |
| 468 | tape_std_mtrew(struct tape_device *device, int mt_count) |
| 469 | { |
| 470 | struct tape_request *request; |
| 471 | |
| 472 | request = tape_alloc_request(3, 0); |
| 473 | if (IS_ERR(request)) |
| 474 | return PTR_ERR(request); |
| 475 | request->op = TO_REW; |
| 476 | /* setup ccws */ |
| 477 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, |
| 478 | device->modeset_byte); |
| 479 | tape_ccw_cc(request->cpaddr + 1, REWIND, 0, NULL); |
| 480 | tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL); |
| 481 | |
| 482 | /* execute it */ |
| 483 | return tape_do_io_free(device, request); |
| 484 | } |
| 485 | |
| 486 | /* |
| 487 | * MTOFFL: Rewind the tape and put the drive off-line. |
| 488 | * Implement 'rewind unload' |
| 489 | */ |
| 490 | int |
| 491 | tape_std_mtoffl(struct tape_device *device, int mt_count) |
| 492 | { |
| 493 | struct tape_request *request; |
| 494 | |
| 495 | request = tape_alloc_request(3, 0); |
| 496 | if (IS_ERR(request)) |
| 497 | return PTR_ERR(request); |
| 498 | request->op = TO_RUN; |
| 499 | /* setup ccws */ |
| 500 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); |
| 501 | tape_ccw_cc(request->cpaddr + 1, REWIND_UNLOAD, 0, NULL); |
| 502 | tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL); |
| 503 | |
| 504 | /* execute it */ |
| 505 | return tape_do_io_free(device, request); |
| 506 | } |
| 507 | |
| 508 | /* |
| 509 | * MTNOP: 'No operation'. |
| 510 | */ |
| 511 | int |
| 512 | tape_std_mtnop(struct tape_device *device, int mt_count) |
| 513 | { |
| 514 | struct tape_request *request; |
| 515 | |
| 516 | request = tape_alloc_request(2, 0); |
| 517 | if (IS_ERR(request)) |
| 518 | return PTR_ERR(request); |
| 519 | request->op = TO_NOP; |
| 520 | /* setup ccws */ |
| 521 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); |
| 522 | tape_ccw_end(request->cpaddr + 1, NOP, 0, NULL); |
| 523 | /* execute it */ |
| 524 | return tape_do_io_free(device, request); |
| 525 | } |
| 526 | |
| 527 | /* |
| 528 | * MTEOM: positions at the end of the portion of the tape already used |
| 529 | * for recordind data. MTEOM positions after the last file mark, ready for |
| 530 | * appending another file. |
| 531 | */ |
| 532 | int |
| 533 | tape_std_mteom(struct tape_device *device, int mt_count) |
| 534 | { |
| 535 | int rc; |
| 536 | |
| 537 | /* |
| 538 | * Seek from the beginning of tape (rewind). |
| 539 | */ |
| 540 | if ((rc = tape_mtop(device, MTREW, 1)) < 0) |
| 541 | return rc; |
| 542 | |
| 543 | /* |
| 544 | * The logical end of volume is given by two sewuential tapemarks. |
| 545 | * Look for this by skipping to the next file (over one tapemark) |
| 546 | * and then test for another one (fsr returns 1 if a tapemark was |
| 547 | * encountered). |
| 548 | */ |
| 549 | do { |
| 550 | if ((rc = tape_mtop(device, MTFSF, 1)) < 0) |
| 551 | return rc; |
| 552 | if ((rc = tape_mtop(device, MTFSR, 1)) < 0) |
| 553 | return rc; |
| 554 | } while (rc == 0); |
| 555 | |
| 556 | return tape_mtop(device, MTBSR, 1); |
| 557 | } |
| 558 | |
| 559 | /* |
| 560 | * MTRETEN: Retension the tape, i.e. forward space to end of tape and rewind. |
| 561 | */ |
| 562 | int |
| 563 | tape_std_mtreten(struct tape_device *device, int mt_count) |
| 564 | { |
| 565 | struct tape_request *request; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | |
| 567 | request = tape_alloc_request(4, 0); |
| 568 | if (IS_ERR(request)) |
| 569 | return PTR_ERR(request); |
| 570 | request->op = TO_FSF; |
| 571 | /* setup ccws */ |
| 572 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); |
| 573 | tape_ccw_cc(request->cpaddr + 1,FORSPACEFILE, 0, NULL); |
| 574 | tape_ccw_cc(request->cpaddr + 2, NOP, 0, NULL); |
| 575 | tape_ccw_end(request->cpaddr + 3, CCW_CMD_TIC, 0, request->cpaddr); |
| 576 | /* execute it, MTRETEN rc gets ignored */ |
Heiko Carstens | 160fbf2 | 2011-05-23 10:24:28 +0200 | [diff] [blame] | 577 | tape_do_io_interruptible(device, request); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | tape_free_request(request); |
| 579 | return tape_mtop(device, MTREW, 1); |
| 580 | } |
| 581 | |
| 582 | /* |
| 583 | * MTERASE: erases the tape. |
| 584 | */ |
| 585 | int |
| 586 | tape_std_mterase(struct tape_device *device, int mt_count) |
| 587 | { |
| 588 | struct tape_request *request; |
| 589 | |
| 590 | request = tape_alloc_request(6, 0); |
| 591 | if (IS_ERR(request)) |
| 592 | return PTR_ERR(request); |
| 593 | request->op = TO_DSE; |
| 594 | /* setup ccws */ |
| 595 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); |
| 596 | tape_ccw_cc(request->cpaddr + 1, REWIND, 0, NULL); |
| 597 | tape_ccw_cc(request->cpaddr + 2, ERASE_GAP, 0, NULL); |
| 598 | tape_ccw_cc(request->cpaddr + 3, DATA_SEC_ERASE, 0, NULL); |
| 599 | tape_ccw_cc(request->cpaddr + 4, REWIND, 0, NULL); |
| 600 | tape_ccw_end(request->cpaddr + 5, NOP, 0, NULL); |
| 601 | |
| 602 | /* execute it */ |
| 603 | return tape_do_io_free(device, request); |
| 604 | } |
| 605 | |
| 606 | /* |
| 607 | * MTUNLOAD: Rewind the tape and unload it. |
| 608 | */ |
| 609 | int |
| 610 | tape_std_mtunload(struct tape_device *device, int mt_count) |
| 611 | { |
| 612 | return tape_mtop(device, MTOFFL, mt_count); |
| 613 | } |
| 614 | |
| 615 | /* |
| 616 | * MTCOMPRESSION: used to enable compression. |
| 617 | * Sets the IDRC on/off. |
| 618 | */ |
| 619 | int |
| 620 | tape_std_mtcompression(struct tape_device *device, int mt_count) |
| 621 | { |
| 622 | struct tape_request *request; |
| 623 | |
| 624 | if (mt_count < 0 || mt_count > 1) { |
| 625 | DBF_EXCEPTION(6, "xcom parm\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | return -EINVAL; |
| 627 | } |
| 628 | request = tape_alloc_request(2, 0); |
| 629 | if (IS_ERR(request)) |
| 630 | return PTR_ERR(request); |
| 631 | request->op = TO_NOP; |
| 632 | /* setup ccws */ |
Michael Holzheu | 4925c7e | 2007-03-05 23:35:47 +0100 | [diff] [blame] | 633 | if (mt_count == 0) |
| 634 | *device->modeset_byte &= ~0x08; |
| 635 | else |
| 636 | *device->modeset_byte |= 0x08; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); |
| 638 | tape_ccw_end(request->cpaddr + 1, NOP, 0, NULL); |
| 639 | /* execute it */ |
| 640 | return tape_do_io_free(device, request); |
| 641 | } |
| 642 | |
| 643 | /* |
| 644 | * Read Block |
| 645 | */ |
| 646 | struct tape_request * |
| 647 | tape_std_read_block(struct tape_device *device, size_t count) |
| 648 | { |
| 649 | struct tape_request *request; |
| 650 | |
| 651 | /* |
| 652 | * We have to alloc 4 ccws in order to be able to transform request |
| 653 | * into a read backward request in error case. |
| 654 | */ |
| 655 | request = tape_alloc_request(4, 0); |
| 656 | if (IS_ERR(request)) { |
| 657 | DBF_EXCEPTION(6, "xrbl fail"); |
| 658 | return request; |
| 659 | } |
| 660 | request->op = TO_RFO; |
| 661 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); |
| 662 | tape_ccw_end_idal(request->cpaddr + 1, READ_FORWARD, |
| 663 | device->char_data.idal_buf); |
| 664 | DBF_EVENT(6, "xrbl ccwg\n"); |
| 665 | return request; |
| 666 | } |
| 667 | |
| 668 | /* |
| 669 | * Read Block backward transformation function. |
| 670 | */ |
| 671 | void |
| 672 | tape_std_read_backward(struct tape_device *device, struct tape_request *request) |
| 673 | { |
| 674 | /* |
| 675 | * We have allocated 4 ccws in tape_std_read, so we can now |
| 676 | * transform the request to a read backward, followed by a |
| 677 | * forward space block. |
| 678 | */ |
| 679 | request->op = TO_RBA; |
| 680 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); |
| 681 | tape_ccw_cc_idal(request->cpaddr + 1, READ_BACKWARD, |
| 682 | device->char_data.idal_buf); |
| 683 | tape_ccw_cc(request->cpaddr + 2, FORSPACEBLOCK, 0, NULL); |
| 684 | tape_ccw_end(request->cpaddr + 3, NOP, 0, NULL); |
| 685 | DBF_EVENT(6, "xrop ccwg");} |
| 686 | |
| 687 | /* |
| 688 | * Write Block |
| 689 | */ |
| 690 | struct tape_request * |
| 691 | tape_std_write_block(struct tape_device *device, size_t count) |
| 692 | { |
| 693 | struct tape_request *request; |
| 694 | |
| 695 | request = tape_alloc_request(2, 0); |
| 696 | if (IS_ERR(request)) { |
| 697 | DBF_EXCEPTION(6, "xwbl fail\n"); |
| 698 | return request; |
| 699 | } |
| 700 | request->op = TO_WRI; |
| 701 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); |
| 702 | tape_ccw_end_idal(request->cpaddr + 1, WRITE_CMD, |
| 703 | device->char_data.idal_buf); |
| 704 | DBF_EVENT(6, "xwbl ccwg\n"); |
| 705 | return request; |
| 706 | } |
| 707 | |
| 708 | /* |
| 709 | * This routine is called by frontend after an ENOSP on write |
| 710 | */ |
| 711 | void |
| 712 | tape_std_process_eov(struct tape_device *device) |
| 713 | { |
| 714 | /* |
| 715 | * End of volume: We have to backspace the last written record, then |
| 716 | * we TRY to write a tapemark and then backspace over the written TM |
| 717 | */ |
| 718 | if (tape_mtop(device, MTBSR, 1) == 0 && |
| 719 | tape_mtop(device, MTWEOF, 1) == 0) { |
| 720 | tape_mtop(device, MTBSR, 1); |
| 721 | } |
| 722 | } |
| 723 | |
| 724 | EXPORT_SYMBOL(tape_std_assign); |
| 725 | EXPORT_SYMBOL(tape_std_unassign); |
| 726 | EXPORT_SYMBOL(tape_std_display); |
| 727 | EXPORT_SYMBOL(tape_std_read_block_id); |
| 728 | EXPORT_SYMBOL(tape_std_mtload); |
| 729 | EXPORT_SYMBOL(tape_std_mtsetblk); |
| 730 | EXPORT_SYMBOL(tape_std_mtreset); |
| 731 | EXPORT_SYMBOL(tape_std_mtfsf); |
| 732 | EXPORT_SYMBOL(tape_std_mtfsr); |
| 733 | EXPORT_SYMBOL(tape_std_mtbsr); |
| 734 | EXPORT_SYMBOL(tape_std_mtweof); |
| 735 | EXPORT_SYMBOL(tape_std_mtbsfm); |
| 736 | EXPORT_SYMBOL(tape_std_mtbsf); |
| 737 | EXPORT_SYMBOL(tape_std_mtfsfm); |
| 738 | EXPORT_SYMBOL(tape_std_mtrew); |
| 739 | EXPORT_SYMBOL(tape_std_mtoffl); |
| 740 | EXPORT_SYMBOL(tape_std_mtnop); |
| 741 | EXPORT_SYMBOL(tape_std_mteom); |
| 742 | EXPORT_SYMBOL(tape_std_mtreten); |
| 743 | EXPORT_SYMBOL(tape_std_mterase); |
| 744 | EXPORT_SYMBOL(tape_std_mtunload); |
| 745 | EXPORT_SYMBOL(tape_std_mtcompression); |
| 746 | EXPORT_SYMBOL(tape_std_read_block); |
| 747 | EXPORT_SYMBOL(tape_std_read_backward); |
| 748 | EXPORT_SYMBOL(tape_std_write_block); |
| 749 | EXPORT_SYMBOL(tape_std_process_eov); |