| 1 | /* |
| 2 | * Copyright (C) 2000-2002 Michael Cornwell <cornwell@acm.org> |
| 3 | * Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org> |
| 4 | * Copyright (C) 2001-2002 Klaus Smolin |
| 5 | * IBM Storage Technology Division |
| 6 | * Copyright (C) 2003-2004, 2007 Bartlomiej Zolnierkiewicz |
| 7 | * |
| 8 | * The big the bad and the ugly. |
| 9 | */ |
| 10 | |
| 11 | #include <linux/types.h> |
| 12 | #include <linux/string.h> |
| 13 | #include <linux/kernel.h> |
| 14 | #include <linux/sched.h> |
| 15 | #include <linux/interrupt.h> |
| 16 | #include <linux/errno.h> |
| 17 | #include <linux/slab.h> |
| 18 | #include <linux/delay.h> |
| 19 | #include <linux/hdreg.h> |
| 20 | #include <linux/ide.h> |
| 21 | #include <linux/scatterlist.h> |
| 22 | |
| 23 | #include <asm/uaccess.h> |
| 24 | #include <asm/io.h> |
| 25 | |
| 26 | void ide_tf_dump(const char *s, struct ide_taskfile *tf) |
| 27 | { |
| 28 | #ifdef DEBUG |
| 29 | printk("%s: tf: feat 0x%02x nsect 0x%02x lbal 0x%02x " |
| 30 | "lbam 0x%02x lbah 0x%02x dev 0x%02x cmd 0x%02x\n", |
| 31 | s, tf->feature, tf->nsect, tf->lbal, |
| 32 | tf->lbam, tf->lbah, tf->device, tf->command); |
| 33 | printk("%s: hob: nsect 0x%02x lbal 0x%02x " |
| 34 | "lbam 0x%02x lbah 0x%02x\n", |
| 35 | s, tf->hob_nsect, tf->hob_lbal, |
| 36 | tf->hob_lbam, tf->hob_lbah); |
| 37 | #endif |
| 38 | } |
| 39 | |
| 40 | int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf) |
| 41 | { |
| 42 | ide_task_t args; |
| 43 | |
| 44 | memset(&args, 0, sizeof(ide_task_t)); |
| 45 | args.tf.nsect = 0x01; |
| 46 | if (drive->media == ide_disk) |
| 47 | args.tf.command = WIN_IDENTIFY; |
| 48 | else |
| 49 | args.tf.command = WIN_PIDENTIFY; |
| 50 | args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; |
| 51 | args.data_phase = TASKFILE_IN; |
| 52 | return ide_raw_taskfile(drive, &args, buf, 1); |
| 53 | } |
| 54 | |
| 55 | static ide_startstop_t task_no_data_intr(ide_drive_t *); |
| 56 | static ide_startstop_t set_geometry_intr(ide_drive_t *); |
| 57 | static ide_startstop_t recal_intr(ide_drive_t *); |
| 58 | static ide_startstop_t set_multmode_intr(ide_drive_t *); |
| 59 | static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *); |
| 60 | static ide_startstop_t task_in_intr(ide_drive_t *); |
| 61 | |
| 62 | ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task) |
| 63 | { |
| 64 | ide_hwif_t *hwif = HWIF(drive); |
| 65 | struct ide_taskfile *tf = &task->tf; |
| 66 | ide_handler_t *handler = NULL; |
| 67 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
| 68 | const struct ide_dma_ops *dma_ops = hwif->dma_ops; |
| 69 | |
| 70 | if (task->data_phase == TASKFILE_MULTI_IN || |
| 71 | task->data_phase == TASKFILE_MULTI_OUT) { |
| 72 | if (!drive->mult_count) { |
| 73 | printk(KERN_ERR "%s: multimode not set!\n", |
| 74 | drive->name); |
| 75 | return ide_stopped; |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | if (task->tf_flags & IDE_TFLAG_FLAGGED) |
| 80 | task->tf_flags |= IDE_TFLAG_FLAGGED_SET_IN_FLAGS; |
| 81 | |
| 82 | if ((task->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0) { |
| 83 | ide_tf_dump(drive->name, tf); |
| 84 | tp_ops->set_irq(hwif, 1); |
| 85 | SELECT_MASK(drive, 0); |
| 86 | tp_ops->tf_load(drive, task); |
| 87 | } |
| 88 | |
| 89 | switch (task->data_phase) { |
| 90 | case TASKFILE_MULTI_OUT: |
| 91 | case TASKFILE_OUT: |
| 92 | tp_ops->exec_command(hwif, tf->command); |
| 93 | ndelay(400); /* FIXME */ |
| 94 | return pre_task_out_intr(drive, task->rq); |
| 95 | case TASKFILE_MULTI_IN: |
| 96 | case TASKFILE_IN: |
| 97 | handler = task_in_intr; |
| 98 | /* fall-through */ |
| 99 | case TASKFILE_NO_DATA: |
| 100 | if (handler == NULL) |
| 101 | handler = task_no_data_intr; |
| 102 | /* WIN_{SPECIFY,RESTORE,SETMULT} use custom handlers */ |
| 103 | if (task->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) { |
| 104 | switch (tf->command) { |
| 105 | case WIN_SPECIFY: handler = set_geometry_intr; break; |
| 106 | case WIN_RESTORE: handler = recal_intr; break; |
| 107 | case WIN_SETMULT: handler = set_multmode_intr; break; |
| 108 | } |
| 109 | } |
| 110 | ide_execute_command(drive, tf->command, handler, |
| 111 | WAIT_WORSTCASE, NULL); |
| 112 | return ide_started; |
| 113 | default: |
| 114 | if (drive->using_dma == 0 || dma_ops->dma_setup(drive)) |
| 115 | return ide_stopped; |
| 116 | dma_ops->dma_exec_cmd(drive, tf->command); |
| 117 | dma_ops->dma_start(drive); |
| 118 | return ide_started; |
| 119 | } |
| 120 | } |
| 121 | EXPORT_SYMBOL_GPL(do_rw_taskfile); |
| 122 | |
| 123 | /* |
| 124 | * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd. |
| 125 | */ |
| 126 | static ide_startstop_t set_multmode_intr(ide_drive_t *drive) |
| 127 | { |
| 128 | ide_hwif_t *hwif = drive->hwif; |
| 129 | u8 stat; |
| 130 | |
| 131 | local_irq_enable_in_hardirq(); |
| 132 | stat = hwif->tp_ops->read_status(hwif); |
| 133 | |
| 134 | if (OK_STAT(stat, READY_STAT, BAD_STAT)) |
| 135 | drive->mult_count = drive->mult_req; |
| 136 | else { |
| 137 | drive->mult_req = drive->mult_count = 0; |
| 138 | drive->special.b.recalibrate = 1; |
| 139 | (void) ide_dump_status(drive, "set_multmode", stat); |
| 140 | } |
| 141 | return ide_stopped; |
| 142 | } |
| 143 | |
| 144 | /* |
| 145 | * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd. |
| 146 | */ |
| 147 | static ide_startstop_t set_geometry_intr(ide_drive_t *drive) |
| 148 | { |
| 149 | ide_hwif_t *hwif = drive->hwif; |
| 150 | int retries = 5; |
| 151 | u8 stat; |
| 152 | |
| 153 | local_irq_enable_in_hardirq(); |
| 154 | |
| 155 | while (1) { |
| 156 | stat = hwif->tp_ops->read_status(hwif); |
| 157 | if ((stat & BUSY_STAT) == 0 || retries-- == 0) |
| 158 | break; |
| 159 | udelay(10); |
| 160 | }; |
| 161 | |
| 162 | if (OK_STAT(stat, READY_STAT, BAD_STAT)) |
| 163 | return ide_stopped; |
| 164 | |
| 165 | if (stat & (ERR_STAT|DRQ_STAT)) |
| 166 | return ide_error(drive, "set_geometry_intr", stat); |
| 167 | |
| 168 | ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL); |
| 169 | return ide_started; |
| 170 | } |
| 171 | |
| 172 | /* |
| 173 | * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd. |
| 174 | */ |
| 175 | static ide_startstop_t recal_intr(ide_drive_t *drive) |
| 176 | { |
| 177 | ide_hwif_t *hwif = drive->hwif; |
| 178 | u8 stat; |
| 179 | |
| 180 | local_irq_enable_in_hardirq(); |
| 181 | stat = hwif->tp_ops->read_status(hwif); |
| 182 | |
| 183 | if (!OK_STAT(stat, READY_STAT, BAD_STAT)) |
| 184 | return ide_error(drive, "recal_intr", stat); |
| 185 | return ide_stopped; |
| 186 | } |
| 187 | |
| 188 | /* |
| 189 | * Handler for commands without a data phase |
| 190 | */ |
| 191 | static ide_startstop_t task_no_data_intr(ide_drive_t *drive) |
| 192 | { |
| 193 | ide_hwif_t *hwif = drive->hwif; |
| 194 | ide_task_t *args = hwif->hwgroup->rq->special; |
| 195 | u8 stat; |
| 196 | |
| 197 | local_irq_enable_in_hardirq(); |
| 198 | stat = hwif->tp_ops->read_status(hwif); |
| 199 | |
| 200 | if (!OK_STAT(stat, READY_STAT, BAD_STAT)) |
| 201 | return ide_error(drive, "task_no_data_intr", stat); |
| 202 | /* calls ide_end_drive_cmd */ |
| 203 | |
| 204 | if (args) |
| 205 | ide_end_drive_cmd(drive, stat, ide_read_error(drive)); |
| 206 | |
| 207 | return ide_stopped; |
| 208 | } |
| 209 | |
| 210 | static u8 wait_drive_not_busy(ide_drive_t *drive) |
| 211 | { |
| 212 | ide_hwif_t *hwif = drive->hwif; |
| 213 | int retries; |
| 214 | u8 stat; |
| 215 | |
| 216 | /* |
| 217 | * Last sector was transfered, wait until device is ready. This can |
| 218 | * take up to 6 ms on some ATAPI devices, so we will wait max 10 ms. |
| 219 | */ |
| 220 | for (retries = 0; retries < 1000; retries++) { |
| 221 | stat = hwif->tp_ops->read_status(hwif); |
| 222 | |
| 223 | if (stat & BUSY_STAT) |
| 224 | udelay(10); |
| 225 | else |
| 226 | break; |
| 227 | } |
| 228 | |
| 229 | if (stat & BUSY_STAT) |
| 230 | printk(KERN_ERR "%s: drive still BUSY!\n", drive->name); |
| 231 | |
| 232 | return stat; |
| 233 | } |
| 234 | |
| 235 | static void ide_pio_sector(ide_drive_t *drive, struct request *rq, |
| 236 | unsigned int write) |
| 237 | { |
| 238 | ide_hwif_t *hwif = drive->hwif; |
| 239 | struct scatterlist *sg = hwif->sg_table; |
| 240 | struct scatterlist *cursg = hwif->cursg; |
| 241 | struct page *page; |
| 242 | #ifdef CONFIG_HIGHMEM |
| 243 | unsigned long flags; |
| 244 | #endif |
| 245 | unsigned int offset; |
| 246 | u8 *buf; |
| 247 | |
| 248 | cursg = hwif->cursg; |
| 249 | if (!cursg) { |
| 250 | cursg = sg; |
| 251 | hwif->cursg = sg; |
| 252 | } |
| 253 | |
| 254 | page = sg_page(cursg); |
| 255 | offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE; |
| 256 | |
| 257 | /* get the current page and offset */ |
| 258 | page = nth_page(page, (offset >> PAGE_SHIFT)); |
| 259 | offset %= PAGE_SIZE; |
| 260 | |
| 261 | #ifdef CONFIG_HIGHMEM |
| 262 | local_irq_save(flags); |
| 263 | #endif |
| 264 | buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset; |
| 265 | |
| 266 | hwif->nleft--; |
| 267 | hwif->cursg_ofs++; |
| 268 | |
| 269 | if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) { |
| 270 | hwif->cursg = sg_next(hwif->cursg); |
| 271 | hwif->cursg_ofs = 0; |
| 272 | } |
| 273 | |
| 274 | /* do the actual data transfer */ |
| 275 | if (write) |
| 276 | hwif->tp_ops->output_data(drive, rq, buf, SECTOR_SIZE); |
| 277 | else |
| 278 | hwif->tp_ops->input_data(drive, rq, buf, SECTOR_SIZE); |
| 279 | |
| 280 | kunmap_atomic(buf, KM_BIO_SRC_IRQ); |
| 281 | #ifdef CONFIG_HIGHMEM |
| 282 | local_irq_restore(flags); |
| 283 | #endif |
| 284 | } |
| 285 | |
| 286 | static void ide_pio_multi(ide_drive_t *drive, struct request *rq, |
| 287 | unsigned int write) |
| 288 | { |
| 289 | unsigned int nsect; |
| 290 | |
| 291 | nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count); |
| 292 | while (nsect--) |
| 293 | ide_pio_sector(drive, rq, write); |
| 294 | } |
| 295 | |
| 296 | static void ide_pio_datablock(ide_drive_t *drive, struct request *rq, |
| 297 | unsigned int write) |
| 298 | { |
| 299 | u8 saved_io_32bit = drive->io_32bit; |
| 300 | |
| 301 | if (rq->bio) /* fs request */ |
| 302 | rq->errors = 0; |
| 303 | |
| 304 | if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) { |
| 305 | ide_task_t *task = rq->special; |
| 306 | |
| 307 | if (task->tf_flags & IDE_TFLAG_IO_16BIT) |
| 308 | drive->io_32bit = 0; |
| 309 | } |
| 310 | |
| 311 | touch_softlockup_watchdog(); |
| 312 | |
| 313 | switch (drive->hwif->data_phase) { |
| 314 | case TASKFILE_MULTI_IN: |
| 315 | case TASKFILE_MULTI_OUT: |
| 316 | ide_pio_multi(drive, rq, write); |
| 317 | break; |
| 318 | default: |
| 319 | ide_pio_sector(drive, rq, write); |
| 320 | break; |
| 321 | } |
| 322 | |
| 323 | drive->io_32bit = saved_io_32bit; |
| 324 | } |
| 325 | |
| 326 | static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq, |
| 327 | const char *s, u8 stat) |
| 328 | { |
| 329 | if (rq->bio) { |
| 330 | ide_hwif_t *hwif = drive->hwif; |
| 331 | int sectors = hwif->nsect - hwif->nleft; |
| 332 | |
| 333 | switch (hwif->data_phase) { |
| 334 | case TASKFILE_IN: |
| 335 | if (hwif->nleft) |
| 336 | break; |
| 337 | /* fall through */ |
| 338 | case TASKFILE_OUT: |
| 339 | sectors--; |
| 340 | break; |
| 341 | case TASKFILE_MULTI_IN: |
| 342 | if (hwif->nleft) |
| 343 | break; |
| 344 | /* fall through */ |
| 345 | case TASKFILE_MULTI_OUT: |
| 346 | sectors -= drive->mult_count; |
| 347 | default: |
| 348 | break; |
| 349 | } |
| 350 | |
| 351 | if (sectors > 0) { |
| 352 | ide_driver_t *drv; |
| 353 | |
| 354 | drv = *(ide_driver_t **)rq->rq_disk->private_data; |
| 355 | drv->end_request(drive, 1, sectors); |
| 356 | } |
| 357 | } |
| 358 | return ide_error(drive, s, stat); |
| 359 | } |
| 360 | |
| 361 | void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat) |
| 362 | { |
| 363 | if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) { |
| 364 | u8 err = ide_read_error(drive); |
| 365 | |
| 366 | ide_end_drive_cmd(drive, stat, err); |
| 367 | return; |
| 368 | } |
| 369 | |
| 370 | if (rq->rq_disk) { |
| 371 | ide_driver_t *drv; |
| 372 | |
| 373 | drv = *(ide_driver_t **)rq->rq_disk->private_data;; |
| 374 | drv->end_request(drive, 1, rq->nr_sectors); |
| 375 | } else |
| 376 | ide_end_request(drive, 1, rq->nr_sectors); |
| 377 | } |
| 378 | |
| 379 | /* |
| 380 | * We got an interrupt on a task_in case, but no errors and no DRQ. |
| 381 | * |
| 382 | * It might be a spurious irq (shared irq), but it might be a |
| 383 | * command that had no output. |
| 384 | */ |
| 385 | static ide_startstop_t task_in_unexpected(ide_drive_t *drive, struct request *rq, u8 stat) |
| 386 | { |
| 387 | /* Command all done? */ |
| 388 | if (OK_STAT(stat, READY_STAT, BUSY_STAT)) { |
| 389 | task_end_request(drive, rq, stat); |
| 390 | return ide_stopped; |
| 391 | } |
| 392 | |
| 393 | /* Assume it was a spurious irq */ |
| 394 | ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL); |
| 395 | return ide_started; |
| 396 | } |
| 397 | |
| 398 | /* |
| 399 | * Handler for command with PIO data-in phase (Read/Read Multiple). |
| 400 | */ |
| 401 | static ide_startstop_t task_in_intr(ide_drive_t *drive) |
| 402 | { |
| 403 | ide_hwif_t *hwif = drive->hwif; |
| 404 | struct request *rq = hwif->hwgroup->rq; |
| 405 | u8 stat = hwif->tp_ops->read_status(hwif); |
| 406 | |
| 407 | /* Error? */ |
| 408 | if (stat & ERR_STAT) |
| 409 | return task_error(drive, rq, __func__, stat); |
| 410 | |
| 411 | /* Didn't want any data? Odd. */ |
| 412 | if (!(stat & DRQ_STAT)) |
| 413 | return task_in_unexpected(drive, rq, stat); |
| 414 | |
| 415 | ide_pio_datablock(drive, rq, 0); |
| 416 | |
| 417 | /* Are we done? Check status and finish transfer. */ |
| 418 | if (!hwif->nleft) { |
| 419 | stat = wait_drive_not_busy(drive); |
| 420 | if (!OK_STAT(stat, 0, BAD_STAT)) |
| 421 | return task_error(drive, rq, __func__, stat); |
| 422 | task_end_request(drive, rq, stat); |
| 423 | return ide_stopped; |
| 424 | } |
| 425 | |
| 426 | /* Still data left to transfer. */ |
| 427 | ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL); |
| 428 | |
| 429 | return ide_started; |
| 430 | } |
| 431 | |
| 432 | /* |
| 433 | * Handler for command with PIO data-out phase (Write/Write Multiple). |
| 434 | */ |
| 435 | static ide_startstop_t task_out_intr (ide_drive_t *drive) |
| 436 | { |
| 437 | ide_hwif_t *hwif = drive->hwif; |
| 438 | struct request *rq = HWGROUP(drive)->rq; |
| 439 | u8 stat = hwif->tp_ops->read_status(hwif); |
| 440 | |
| 441 | if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat)) |
| 442 | return task_error(drive, rq, __func__, stat); |
| 443 | |
| 444 | /* Deal with unexpected ATA data phase. */ |
| 445 | if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft) |
| 446 | return task_error(drive, rq, __func__, stat); |
| 447 | |
| 448 | if (!hwif->nleft) { |
| 449 | task_end_request(drive, rq, stat); |
| 450 | return ide_stopped; |
| 451 | } |
| 452 | |
| 453 | /* Still data left to transfer. */ |
| 454 | ide_pio_datablock(drive, rq, 1); |
| 455 | ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL); |
| 456 | |
| 457 | return ide_started; |
| 458 | } |
| 459 | |
| 460 | static ide_startstop_t pre_task_out_intr(ide_drive_t *drive, struct request *rq) |
| 461 | { |
| 462 | ide_startstop_t startstop; |
| 463 | |
| 464 | if (ide_wait_stat(&startstop, drive, DRQ_STAT, |
| 465 | drive->bad_wstat, WAIT_DRQ)) { |
| 466 | printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n", |
| 467 | drive->name, |
| 468 | drive->hwif->data_phase ? "MULT" : "", |
| 469 | drive->addressing ? "_EXT" : ""); |
| 470 | return startstop; |
| 471 | } |
| 472 | |
| 473 | if (!drive->unmask) |
| 474 | local_irq_disable(); |
| 475 | |
| 476 | ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL); |
| 477 | ide_pio_datablock(drive, rq, 1); |
| 478 | |
| 479 | return ide_started; |
| 480 | } |
| 481 | |
| 482 | int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect) |
| 483 | { |
| 484 | struct request *rq; |
| 485 | int error; |
| 486 | |
| 487 | rq = blk_get_request(drive->queue, READ, __GFP_WAIT); |
| 488 | rq->cmd_type = REQ_TYPE_ATA_TASKFILE; |
| 489 | rq->buffer = buf; |
| 490 | |
| 491 | /* |
| 492 | * (ks) We transfer currently only whole sectors. |
| 493 | * This is suffient for now. But, it would be great, |
| 494 | * if we would find a solution to transfer any size. |
| 495 | * To support special commands like READ LONG. |
| 496 | */ |
| 497 | rq->hard_nr_sectors = rq->nr_sectors = nsect; |
| 498 | rq->hard_cur_sectors = rq->current_nr_sectors = nsect; |
| 499 | |
| 500 | if (task->tf_flags & IDE_TFLAG_WRITE) |
| 501 | rq->cmd_flags |= REQ_RW; |
| 502 | |
| 503 | rq->special = task; |
| 504 | task->rq = rq; |
| 505 | |
| 506 | error = blk_execute_rq(drive->queue, NULL, rq, 0); |
| 507 | blk_put_request(rq); |
| 508 | |
| 509 | return error; |
| 510 | } |
| 511 | |
| 512 | EXPORT_SYMBOL(ide_raw_taskfile); |
| 513 | |
| 514 | int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task) |
| 515 | { |
| 516 | task->data_phase = TASKFILE_NO_DATA; |
| 517 | |
| 518 | return ide_raw_taskfile(drive, task, NULL, 0); |
| 519 | } |
| 520 | EXPORT_SYMBOL_GPL(ide_no_data_taskfile); |
| 521 | |
| 522 | #ifdef CONFIG_IDE_TASK_IOCTL |
| 523 | int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg) |
| 524 | { |
| 525 | ide_task_request_t *req_task; |
| 526 | ide_task_t args; |
| 527 | u8 *outbuf = NULL; |
| 528 | u8 *inbuf = NULL; |
| 529 | u8 *data_buf = NULL; |
| 530 | int err = 0; |
| 531 | int tasksize = sizeof(struct ide_task_request_s); |
| 532 | unsigned int taskin = 0; |
| 533 | unsigned int taskout = 0; |
| 534 | u16 nsect = 0; |
| 535 | char __user *buf = (char __user *)arg; |
| 536 | |
| 537 | // printk("IDE Taskfile ...\n"); |
| 538 | |
| 539 | req_task = kzalloc(tasksize, GFP_KERNEL); |
| 540 | if (req_task == NULL) return -ENOMEM; |
| 541 | if (copy_from_user(req_task, buf, tasksize)) { |
| 542 | kfree(req_task); |
| 543 | return -EFAULT; |
| 544 | } |
| 545 | |
| 546 | taskout = req_task->out_size; |
| 547 | taskin = req_task->in_size; |
| 548 | |
| 549 | if (taskin > 65536 || taskout > 65536) { |
| 550 | err = -EINVAL; |
| 551 | goto abort; |
| 552 | } |
| 553 | |
| 554 | if (taskout) { |
| 555 | int outtotal = tasksize; |
| 556 | outbuf = kzalloc(taskout, GFP_KERNEL); |
| 557 | if (outbuf == NULL) { |
| 558 | err = -ENOMEM; |
| 559 | goto abort; |
| 560 | } |
| 561 | if (copy_from_user(outbuf, buf + outtotal, taskout)) { |
| 562 | err = -EFAULT; |
| 563 | goto abort; |
| 564 | } |
| 565 | } |
| 566 | |
| 567 | if (taskin) { |
| 568 | int intotal = tasksize + taskout; |
| 569 | inbuf = kzalloc(taskin, GFP_KERNEL); |
| 570 | if (inbuf == NULL) { |
| 571 | err = -ENOMEM; |
| 572 | goto abort; |
| 573 | } |
| 574 | if (copy_from_user(inbuf, buf + intotal, taskin)) { |
| 575 | err = -EFAULT; |
| 576 | goto abort; |
| 577 | } |
| 578 | } |
| 579 | |
| 580 | memset(&args, 0, sizeof(ide_task_t)); |
| 581 | |
| 582 | memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2); |
| 583 | memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE); |
| 584 | |
| 585 | args.data_phase = req_task->data_phase; |
| 586 | |
| 587 | args.tf_flags = IDE_TFLAG_IO_16BIT | IDE_TFLAG_DEVICE | |
| 588 | IDE_TFLAG_IN_TF; |
| 589 | if (drive->addressing == 1) |
| 590 | args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_IN_HOB); |
| 591 | |
| 592 | if (req_task->out_flags.all) { |
| 593 | args.tf_flags |= IDE_TFLAG_FLAGGED; |
| 594 | |
| 595 | if (req_task->out_flags.b.data) |
| 596 | args.tf_flags |= IDE_TFLAG_OUT_DATA; |
| 597 | |
| 598 | if (req_task->out_flags.b.nsector_hob) |
| 599 | args.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT; |
| 600 | if (req_task->out_flags.b.sector_hob) |
| 601 | args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL; |
| 602 | if (req_task->out_flags.b.lcyl_hob) |
| 603 | args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM; |
| 604 | if (req_task->out_flags.b.hcyl_hob) |
| 605 | args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH; |
| 606 | |
| 607 | if (req_task->out_flags.b.error_feature) |
| 608 | args.tf_flags |= IDE_TFLAG_OUT_FEATURE; |
| 609 | if (req_task->out_flags.b.nsector) |
| 610 | args.tf_flags |= IDE_TFLAG_OUT_NSECT; |
| 611 | if (req_task->out_flags.b.sector) |
| 612 | args.tf_flags |= IDE_TFLAG_OUT_LBAL; |
| 613 | if (req_task->out_flags.b.lcyl) |
| 614 | args.tf_flags |= IDE_TFLAG_OUT_LBAM; |
| 615 | if (req_task->out_flags.b.hcyl) |
| 616 | args.tf_flags |= IDE_TFLAG_OUT_LBAH; |
| 617 | } else { |
| 618 | args.tf_flags |= IDE_TFLAG_OUT_TF; |
| 619 | if (args.tf_flags & IDE_TFLAG_LBA48) |
| 620 | args.tf_flags |= IDE_TFLAG_OUT_HOB; |
| 621 | } |
| 622 | |
| 623 | if (req_task->in_flags.b.data) |
| 624 | args.tf_flags |= IDE_TFLAG_IN_DATA; |
| 625 | |
| 626 | switch(req_task->data_phase) { |
| 627 | case TASKFILE_MULTI_OUT: |
| 628 | if (!drive->mult_count) { |
| 629 | /* (hs): give up if multcount is not set */ |
| 630 | printk(KERN_ERR "%s: %s Multimode Write " \ |
| 631 | "multcount is not set\n", |
| 632 | drive->name, __func__); |
| 633 | err = -EPERM; |
| 634 | goto abort; |
| 635 | } |
| 636 | /* fall through */ |
| 637 | case TASKFILE_OUT: |
| 638 | /* fall through */ |
| 639 | case TASKFILE_OUT_DMAQ: |
| 640 | case TASKFILE_OUT_DMA: |
| 641 | nsect = taskout / SECTOR_SIZE; |
| 642 | data_buf = outbuf; |
| 643 | break; |
| 644 | case TASKFILE_MULTI_IN: |
| 645 | if (!drive->mult_count) { |
| 646 | /* (hs): give up if multcount is not set */ |
| 647 | printk(KERN_ERR "%s: %s Multimode Read failure " \ |
| 648 | "multcount is not set\n", |
| 649 | drive->name, __func__); |
| 650 | err = -EPERM; |
| 651 | goto abort; |
| 652 | } |
| 653 | /* fall through */ |
| 654 | case TASKFILE_IN: |
| 655 | /* fall through */ |
| 656 | case TASKFILE_IN_DMAQ: |
| 657 | case TASKFILE_IN_DMA: |
| 658 | nsect = taskin / SECTOR_SIZE; |
| 659 | data_buf = inbuf; |
| 660 | break; |
| 661 | case TASKFILE_NO_DATA: |
| 662 | break; |
| 663 | default: |
| 664 | err = -EFAULT; |
| 665 | goto abort; |
| 666 | } |
| 667 | |
| 668 | if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA) |
| 669 | nsect = 0; |
| 670 | else if (!nsect) { |
| 671 | nsect = (args.tf.hob_nsect << 8) | args.tf.nsect; |
| 672 | |
| 673 | if (!nsect) { |
| 674 | printk(KERN_ERR "%s: in/out command without data\n", |
| 675 | drive->name); |
| 676 | err = -EFAULT; |
| 677 | goto abort; |
| 678 | } |
| 679 | } |
| 680 | |
| 681 | if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE) |
| 682 | args.tf_flags |= IDE_TFLAG_WRITE; |
| 683 | |
| 684 | err = ide_raw_taskfile(drive, &args, data_buf, nsect); |
| 685 | |
| 686 | memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2); |
| 687 | memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE); |
| 688 | |
| 689 | if ((args.tf_flags & IDE_TFLAG_FLAGGED_SET_IN_FLAGS) && |
| 690 | req_task->in_flags.all == 0) { |
| 691 | req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS; |
| 692 | if (drive->addressing == 1) |
| 693 | req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8); |
| 694 | } |
| 695 | |
| 696 | if (copy_to_user(buf, req_task, tasksize)) { |
| 697 | err = -EFAULT; |
| 698 | goto abort; |
| 699 | } |
| 700 | if (taskout) { |
| 701 | int outtotal = tasksize; |
| 702 | if (copy_to_user(buf + outtotal, outbuf, taskout)) { |
| 703 | err = -EFAULT; |
| 704 | goto abort; |
| 705 | } |
| 706 | } |
| 707 | if (taskin) { |
| 708 | int intotal = tasksize + taskout; |
| 709 | if (copy_to_user(buf + intotal, inbuf, taskin)) { |
| 710 | err = -EFAULT; |
| 711 | goto abort; |
| 712 | } |
| 713 | } |
| 714 | abort: |
| 715 | kfree(req_task); |
| 716 | kfree(outbuf); |
| 717 | kfree(inbuf); |
| 718 | |
| 719 | // printk("IDE Taskfile ioctl ended. rc = %i\n", err); |
| 720 | |
| 721 | return err; |
| 722 | } |
| 723 | #endif |
| 724 | |
| 725 | int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg) |
| 726 | { |
| 727 | u8 *buf = NULL; |
| 728 | int bufsize = 0, err = 0; |
| 729 | u8 args[4], xfer_rate = 0; |
| 730 | ide_task_t tfargs; |
| 731 | struct ide_taskfile *tf = &tfargs.tf; |
| 732 | struct hd_driveid *id = drive->id; |
| 733 | |
| 734 | if (NULL == (void *) arg) { |
| 735 | struct request *rq; |
| 736 | |
| 737 | rq = blk_get_request(drive->queue, READ, __GFP_WAIT); |
| 738 | rq->cmd_type = REQ_TYPE_ATA_TASKFILE; |
| 739 | err = blk_execute_rq(drive->queue, NULL, rq, 0); |
| 740 | blk_put_request(rq); |
| 741 | |
| 742 | return err; |
| 743 | } |
| 744 | |
| 745 | if (copy_from_user(args, (void __user *)arg, 4)) |
| 746 | return -EFAULT; |
| 747 | |
| 748 | memset(&tfargs, 0, sizeof(ide_task_t)); |
| 749 | tf->feature = args[2]; |
| 750 | if (args[0] == WIN_SMART) { |
| 751 | tf->nsect = args[3]; |
| 752 | tf->lbal = args[1]; |
| 753 | tf->lbam = 0x4f; |
| 754 | tf->lbah = 0xc2; |
| 755 | tfargs.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_IN_NSECT; |
| 756 | } else { |
| 757 | tf->nsect = args[1]; |
| 758 | tfargs.tf_flags = IDE_TFLAG_OUT_FEATURE | |
| 759 | IDE_TFLAG_OUT_NSECT | IDE_TFLAG_IN_NSECT; |
| 760 | } |
| 761 | tf->command = args[0]; |
| 762 | tfargs.data_phase = args[3] ? TASKFILE_IN : TASKFILE_NO_DATA; |
| 763 | |
| 764 | if (args[3]) { |
| 765 | tfargs.tf_flags |= IDE_TFLAG_IO_16BIT; |
| 766 | bufsize = SECTOR_WORDS * 4 * args[3]; |
| 767 | buf = kzalloc(bufsize, GFP_KERNEL); |
| 768 | if (buf == NULL) |
| 769 | return -ENOMEM; |
| 770 | } |
| 771 | |
| 772 | if (tf->command == WIN_SETFEATURES && |
| 773 | tf->feature == SETFEATURES_XFER && |
| 774 | tf->nsect >= XFER_SW_DMA_0 && |
| 775 | (id->dma_ultra || id->dma_mword || id->dma_1word)) { |
| 776 | xfer_rate = args[1]; |
| 777 | if (tf->nsect > XFER_UDMA_2 && !eighty_ninty_three(drive)) { |
| 778 | printk(KERN_WARNING "%s: UDMA speeds >UDMA33 cannot " |
| 779 | "be set\n", drive->name); |
| 780 | goto abort; |
| 781 | } |
| 782 | } |
| 783 | |
| 784 | err = ide_raw_taskfile(drive, &tfargs, buf, args[3]); |
| 785 | |
| 786 | args[0] = tf->status; |
| 787 | args[1] = tf->error; |
| 788 | args[2] = tf->nsect; |
| 789 | |
| 790 | if (!err && xfer_rate) { |
| 791 | /* active-retuning-calls future */ |
| 792 | ide_set_xfer_rate(drive, xfer_rate); |
| 793 | ide_driveid_update(drive); |
| 794 | } |
| 795 | abort: |
| 796 | if (copy_to_user((void __user *)arg, &args, 4)) |
| 797 | err = -EFAULT; |
| 798 | if (buf) { |
| 799 | if (copy_to_user((void __user *)(arg + 4), buf, bufsize)) |
| 800 | err = -EFAULT; |
| 801 | kfree(buf); |
| 802 | } |
| 803 | return err; |
| 804 | } |
| 805 | |
| 806 | int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg) |
| 807 | { |
| 808 | void __user *p = (void __user *)arg; |
| 809 | int err = 0; |
| 810 | u8 args[7]; |
| 811 | ide_task_t task; |
| 812 | |
| 813 | if (copy_from_user(args, p, 7)) |
| 814 | return -EFAULT; |
| 815 | |
| 816 | memset(&task, 0, sizeof(task)); |
| 817 | memcpy(&task.tf_array[7], &args[1], 6); |
| 818 | task.tf.command = args[0]; |
| 819 | task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; |
| 820 | |
| 821 | err = ide_no_data_taskfile(drive, &task); |
| 822 | |
| 823 | args[0] = task.tf.command; |
| 824 | memcpy(&args[1], &task.tf_array[7], 6); |
| 825 | |
| 826 | if (copy_to_user(p, args, 7)) |
| 827 | err = -EFAULT; |
| 828 | |
| 829 | return err; |
| 830 | } |