Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/drivers/ide/ide-taskfile.c Version 0.38 March 05, 2003 |
| 3 | * |
| 4 | * Copyright (C) 2000-2002 Michael Cornwell <cornwell@acm.org> |
| 5 | * Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org> |
| 6 | * Copyright (C) 2001-2002 Klaus Smolin |
| 7 | * IBM Storage Technology Division |
| 8 | * Copyright (C) 2003-2004 Bartlomiej Zolnierkiewicz |
| 9 | * |
| 10 | * The big the bad and the ugly. |
| 11 | * |
| 12 | * Problems to be fixed because of BH interface or the lack therefore. |
| 13 | * |
| 14 | * Fill me in stupid !!! |
| 15 | * |
| 16 | * HOST: |
| 17 | * General refers to the Controller and Driver "pair". |
| 18 | * DATA HANDLER: |
| 19 | * Under the context of Linux it generally refers to an interrupt handler. |
| 20 | * However, it correctly describes the 'HOST' |
| 21 | * DATA BLOCK: |
| 22 | * The amount of data needed to be transfered as predefined in the |
| 23 | * setup of the device. |
| 24 | * STORAGE ATOMIC: |
| 25 | * The 'DATA BLOCK' associated to the 'DATA HANDLER', and can be as |
| 26 | * small as a single sector or as large as the entire command block |
| 27 | * request. |
| 28 | */ |
| 29 | |
| 30 | #include <linux/config.h> |
| 31 | #include <linux/module.h> |
| 32 | #include <linux/types.h> |
| 33 | #include <linux/string.h> |
| 34 | #include <linux/kernel.h> |
| 35 | #include <linux/timer.h> |
| 36 | #include <linux/mm.h> |
| 37 | #include <linux/interrupt.h> |
| 38 | #include <linux/major.h> |
| 39 | #include <linux/errno.h> |
| 40 | #include <linux/genhd.h> |
| 41 | #include <linux/blkpg.h> |
| 42 | #include <linux/slab.h> |
| 43 | #include <linux/pci.h> |
| 44 | #include <linux/delay.h> |
| 45 | #include <linux/hdreg.h> |
| 46 | #include <linux/ide.h> |
| 47 | #include <linux/bitops.h> |
| 48 | |
| 49 | #include <asm/byteorder.h> |
| 50 | #include <asm/irq.h> |
| 51 | #include <asm/uaccess.h> |
| 52 | #include <asm/io.h> |
| 53 | |
| 54 | #define DEBUG_TASKFILE 0 /* unset when fixed */ |
| 55 | |
| 56 | static void ata_bswap_data (void *buffer, int wcount) |
| 57 | { |
| 58 | u16 *p = buffer; |
| 59 | |
| 60 | while (wcount--) { |
| 61 | *p = *p << 8 | *p >> 8; p++; |
| 62 | *p = *p << 8 | *p >> 8; p++; |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | static void taskfile_input_data(ide_drive_t *drive, void *buffer, u32 wcount) |
| 67 | { |
| 68 | HWIF(drive)->ata_input_data(drive, buffer, wcount); |
| 69 | if (drive->bswap) |
| 70 | ata_bswap_data(buffer, wcount); |
| 71 | } |
| 72 | |
| 73 | static void taskfile_output_data(ide_drive_t *drive, void *buffer, u32 wcount) |
| 74 | { |
| 75 | if (drive->bswap) { |
| 76 | ata_bswap_data(buffer, wcount); |
| 77 | HWIF(drive)->ata_output_data(drive, buffer, wcount); |
| 78 | ata_bswap_data(buffer, wcount); |
| 79 | } else { |
| 80 | HWIF(drive)->ata_output_data(drive, buffer, wcount); |
| 81 | } |
| 82 | } |
| 83 | |
| 84 | int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf) |
| 85 | { |
| 86 | ide_task_t args; |
| 87 | memset(&args, 0, sizeof(ide_task_t)); |
| 88 | args.tfRegister[IDE_NSECTOR_OFFSET] = 0x01; |
| 89 | if (drive->media == ide_disk) |
| 90 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_IDENTIFY; |
| 91 | else |
| 92 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_PIDENTIFY; |
| 93 | args.command_type = IDE_DRIVE_TASK_IN; |
| 94 | args.data_phase = TASKFILE_IN; |
| 95 | args.handler = &task_in_intr; |
| 96 | return ide_raw_taskfile(drive, &args, buf); |
| 97 | } |
| 98 | |
| 99 | ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task) |
| 100 | { |
| 101 | ide_hwif_t *hwif = HWIF(drive); |
| 102 | task_struct_t *taskfile = (task_struct_t *) task->tfRegister; |
| 103 | hob_struct_t *hobfile = (hob_struct_t *) task->hobRegister; |
| 104 | u8 HIHI = (drive->addressing == 1) ? 0xE0 : 0xEF; |
| 105 | |
| 106 | /* ALL Command Block Executions SHALL clear nIEN, unless otherwise */ |
| 107 | if (IDE_CONTROL_REG) { |
| 108 | /* clear nIEN */ |
| 109 | hwif->OUTB(drive->ctl, IDE_CONTROL_REG); |
| 110 | } |
| 111 | SELECT_MASK(drive, 0); |
| 112 | |
| 113 | if (drive->addressing == 1) { |
| 114 | hwif->OUTB(hobfile->feature, IDE_FEATURE_REG); |
| 115 | hwif->OUTB(hobfile->sector_count, IDE_NSECTOR_REG); |
| 116 | hwif->OUTB(hobfile->sector_number, IDE_SECTOR_REG); |
| 117 | hwif->OUTB(hobfile->low_cylinder, IDE_LCYL_REG); |
| 118 | hwif->OUTB(hobfile->high_cylinder, IDE_HCYL_REG); |
| 119 | } |
| 120 | |
| 121 | hwif->OUTB(taskfile->feature, IDE_FEATURE_REG); |
| 122 | hwif->OUTB(taskfile->sector_count, IDE_NSECTOR_REG); |
| 123 | hwif->OUTB(taskfile->sector_number, IDE_SECTOR_REG); |
| 124 | hwif->OUTB(taskfile->low_cylinder, IDE_LCYL_REG); |
| 125 | hwif->OUTB(taskfile->high_cylinder, IDE_HCYL_REG); |
| 126 | |
| 127 | hwif->OUTB((taskfile->device_head & HIHI) | drive->select.all, IDE_SELECT_REG); |
| 128 | |
| 129 | if (task->handler != NULL) { |
| 130 | if (task->prehandler != NULL) { |
| 131 | hwif->OUTBSYNC(drive, taskfile->command, IDE_COMMAND_REG); |
| 132 | ndelay(400); /* FIXME */ |
| 133 | return task->prehandler(drive, task->rq); |
| 134 | } |
| 135 | ide_execute_command(drive, taskfile->command, task->handler, WAIT_WORSTCASE, NULL); |
| 136 | return ide_started; |
| 137 | } |
| 138 | |
| 139 | if (!drive->using_dma) |
| 140 | return ide_stopped; |
| 141 | |
| 142 | switch (taskfile->command) { |
| 143 | case WIN_WRITEDMA_ONCE: |
| 144 | case WIN_WRITEDMA: |
| 145 | case WIN_WRITEDMA_EXT: |
| 146 | case WIN_READDMA_ONCE: |
| 147 | case WIN_READDMA: |
| 148 | case WIN_READDMA_EXT: |
| 149 | case WIN_IDENTIFY_DMA: |
| 150 | if (!hwif->dma_setup(drive)) { |
| 151 | hwif->dma_exec_cmd(drive, taskfile->command); |
| 152 | hwif->dma_start(drive); |
| 153 | return ide_started; |
| 154 | } |
| 155 | break; |
| 156 | default: |
| 157 | if (task->handler == NULL) |
| 158 | return ide_stopped; |
| 159 | } |
| 160 | |
| 161 | return ide_stopped; |
| 162 | } |
| 163 | |
| 164 | EXPORT_SYMBOL(do_rw_taskfile); |
| 165 | |
| 166 | /* |
| 167 | * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd. |
| 168 | */ |
| 169 | ide_startstop_t set_multmode_intr (ide_drive_t *drive) |
| 170 | { |
| 171 | ide_hwif_t *hwif = HWIF(drive); |
| 172 | u8 stat; |
| 173 | |
| 174 | if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) { |
| 175 | drive->mult_count = drive->mult_req; |
| 176 | } else { |
| 177 | drive->mult_req = drive->mult_count = 0; |
| 178 | drive->special.b.recalibrate = 1; |
| 179 | (void) ide_dump_status(drive, "set_multmode", stat); |
| 180 | } |
| 181 | return ide_stopped; |
| 182 | } |
| 183 | |
| 184 | /* |
| 185 | * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd. |
| 186 | */ |
| 187 | ide_startstop_t set_geometry_intr (ide_drive_t *drive) |
| 188 | { |
| 189 | ide_hwif_t *hwif = HWIF(drive); |
| 190 | int retries = 5; |
| 191 | u8 stat; |
| 192 | |
| 193 | while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--) |
| 194 | udelay(10); |
| 195 | |
| 196 | if (OK_STAT(stat, READY_STAT, BAD_STAT)) |
| 197 | return ide_stopped; |
| 198 | |
| 199 | if (stat & (ERR_STAT|DRQ_STAT)) |
| 200 | return ide_error(drive, "set_geometry_intr", stat); |
| 201 | |
| 202 | if (HWGROUP(drive)->handler != NULL) |
| 203 | BUG(); |
| 204 | ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL); |
| 205 | return ide_started; |
| 206 | } |
| 207 | |
| 208 | /* |
| 209 | * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd. |
| 210 | */ |
| 211 | ide_startstop_t recal_intr (ide_drive_t *drive) |
| 212 | { |
| 213 | ide_hwif_t *hwif = HWIF(drive); |
| 214 | u8 stat; |
| 215 | |
| 216 | if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT)) |
| 217 | return ide_error(drive, "recal_intr", stat); |
| 218 | return ide_stopped; |
| 219 | } |
| 220 | |
| 221 | /* |
| 222 | * Handler for commands without a data phase |
| 223 | */ |
| 224 | ide_startstop_t task_no_data_intr (ide_drive_t *drive) |
| 225 | { |
| 226 | ide_task_t *args = HWGROUP(drive)->rq->special; |
| 227 | ide_hwif_t *hwif = HWIF(drive); |
| 228 | u8 stat; |
| 229 | |
| 230 | local_irq_enable(); |
| 231 | if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) { |
| 232 | return ide_error(drive, "task_no_data_intr", stat); |
| 233 | /* calls ide_end_drive_cmd */ |
| 234 | } |
| 235 | if (args) |
| 236 | ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG)); |
| 237 | |
| 238 | return ide_stopped; |
| 239 | } |
| 240 | |
| 241 | EXPORT_SYMBOL(task_no_data_intr); |
| 242 | |
| 243 | static u8 wait_drive_not_busy(ide_drive_t *drive) |
| 244 | { |
| 245 | ide_hwif_t *hwif = HWIF(drive); |
| 246 | int retries = 100; |
| 247 | u8 stat; |
| 248 | |
| 249 | /* |
| 250 | * Last sector was transfered, wait until drive is ready. |
| 251 | * This can take up to 10 usec, but we will wait max 1 ms |
| 252 | * (drive_cmd_intr() waits that long). |
| 253 | */ |
| 254 | while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--) |
| 255 | udelay(10); |
| 256 | |
| 257 | if (!retries) |
| 258 | printk(KERN_ERR "%s: drive still BUSY!\n", drive->name); |
| 259 | |
| 260 | return stat; |
| 261 | } |
| 262 | |
| 263 | static void ide_pio_sector(ide_drive_t *drive, unsigned int write) |
| 264 | { |
| 265 | ide_hwif_t *hwif = drive->hwif; |
| 266 | struct scatterlist *sg = hwif->sg_table; |
| 267 | struct page *page; |
| 268 | #ifdef CONFIG_HIGHMEM |
| 269 | unsigned long flags; |
| 270 | #endif |
| 271 | unsigned int offset; |
| 272 | u8 *buf; |
| 273 | |
| 274 | page = sg[hwif->cursg].page; |
| 275 | offset = sg[hwif->cursg].offset + hwif->cursg_ofs * SECTOR_SIZE; |
| 276 | |
| 277 | /* get the current page and offset */ |
| 278 | page = nth_page(page, (offset >> PAGE_SHIFT)); |
| 279 | offset %= PAGE_SIZE; |
| 280 | |
| 281 | #ifdef CONFIG_HIGHMEM |
| 282 | local_irq_save(flags); |
| 283 | #endif |
| 284 | buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset; |
| 285 | |
| 286 | hwif->nleft--; |
| 287 | hwif->cursg_ofs++; |
| 288 | |
| 289 | if ((hwif->cursg_ofs * SECTOR_SIZE) == sg[hwif->cursg].length) { |
| 290 | hwif->cursg++; |
| 291 | hwif->cursg_ofs = 0; |
| 292 | } |
| 293 | |
| 294 | /* do the actual data transfer */ |
| 295 | if (write) |
| 296 | taskfile_output_data(drive, buf, SECTOR_WORDS); |
| 297 | else |
| 298 | taskfile_input_data(drive, buf, SECTOR_WORDS); |
| 299 | |
| 300 | kunmap_atomic(buf, KM_BIO_SRC_IRQ); |
| 301 | #ifdef CONFIG_HIGHMEM |
| 302 | local_irq_restore(flags); |
| 303 | #endif |
| 304 | } |
| 305 | |
| 306 | static void ide_pio_multi(ide_drive_t *drive, unsigned int write) |
| 307 | { |
| 308 | unsigned int nsect; |
| 309 | |
| 310 | nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count); |
| 311 | while (nsect--) |
| 312 | ide_pio_sector(drive, write); |
| 313 | } |
| 314 | |
| 315 | static inline void ide_pio_datablock(ide_drive_t *drive, struct request *rq, |
| 316 | unsigned int write) |
| 317 | { |
| 318 | if (rq->bio) /* fs request */ |
| 319 | rq->errors = 0; |
| 320 | |
| 321 | switch (drive->hwif->data_phase) { |
| 322 | case TASKFILE_MULTI_IN: |
| 323 | case TASKFILE_MULTI_OUT: |
| 324 | ide_pio_multi(drive, write); |
| 325 | break; |
| 326 | default: |
| 327 | ide_pio_sector(drive, write); |
| 328 | break; |
| 329 | } |
| 330 | } |
| 331 | |
| 332 | static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq, |
| 333 | const char *s, u8 stat) |
| 334 | { |
| 335 | if (rq->bio) { |
| 336 | ide_hwif_t *hwif = drive->hwif; |
| 337 | int sectors = hwif->nsect - hwif->nleft; |
| 338 | |
| 339 | switch (hwif->data_phase) { |
| 340 | case TASKFILE_IN: |
| 341 | if (hwif->nleft) |
| 342 | break; |
| 343 | /* fall through */ |
| 344 | case TASKFILE_OUT: |
| 345 | sectors--; |
| 346 | break; |
| 347 | case TASKFILE_MULTI_IN: |
| 348 | if (hwif->nleft) |
| 349 | break; |
| 350 | /* fall through */ |
| 351 | case TASKFILE_MULTI_OUT: |
| 352 | sectors -= drive->mult_count; |
| 353 | default: |
| 354 | break; |
| 355 | } |
| 356 | |
| 357 | if (sectors > 0) { |
| 358 | ide_driver_t *drv; |
| 359 | |
| 360 | drv = *(ide_driver_t **)rq->rq_disk->private_data; |
| 361 | drv->end_request(drive, 1, sectors); |
| 362 | } |
| 363 | } |
| 364 | return ide_error(drive, s, stat); |
| 365 | } |
| 366 | |
| 367 | static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat) |
| 368 | { |
| 369 | if (rq->flags & REQ_DRIVE_TASKFILE) { |
| 370 | ide_task_t *task = rq->special; |
| 371 | |
| 372 | if (task->tf_out_flags.all) { |
| 373 | u8 err = drive->hwif->INB(IDE_ERROR_REG); |
| 374 | ide_end_drive_cmd(drive, stat, err); |
| 375 | return; |
| 376 | } |
| 377 | } |
| 378 | |
| 379 | ide_end_request(drive, 1, rq->hard_nr_sectors); |
| 380 | } |
| 381 | |
| 382 | /* |
| 383 | * Handler for command with PIO data-in phase (Read/Read Multiple). |
| 384 | */ |
| 385 | ide_startstop_t task_in_intr (ide_drive_t *drive) |
| 386 | { |
| 387 | ide_hwif_t *hwif = drive->hwif; |
| 388 | struct request *rq = HWGROUP(drive)->rq; |
| 389 | u8 stat = hwif->INB(IDE_STATUS_REG); |
| 390 | |
| 391 | /* new way for dealing with premature shared PCI interrupts */ |
| 392 | if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) { |
| 393 | if (stat & (ERR_STAT | DRQ_STAT)) |
| 394 | return task_error(drive, rq, __FUNCTION__, stat); |
| 395 | /* No data yet, so wait for another IRQ. */ |
| 396 | ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL); |
| 397 | return ide_started; |
| 398 | } |
| 399 | |
| 400 | ide_pio_datablock(drive, rq, 0); |
| 401 | |
| 402 | /* If it was the last datablock check status and finish transfer. */ |
| 403 | if (!hwif->nleft) { |
| 404 | stat = wait_drive_not_busy(drive); |
| 405 | if (!OK_STAT(stat, 0, BAD_R_STAT)) |
| 406 | return task_error(drive, rq, __FUNCTION__, stat); |
| 407 | task_end_request(drive, rq, stat); |
| 408 | return ide_stopped; |
| 409 | } |
| 410 | |
| 411 | /* Still data left to transfer. */ |
| 412 | ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL); |
| 413 | |
| 414 | return ide_started; |
| 415 | } |
| 416 | EXPORT_SYMBOL(task_in_intr); |
| 417 | |
| 418 | /* |
| 419 | * Handler for command with PIO data-out phase (Write/Write Multiple). |
| 420 | */ |
| 421 | static ide_startstop_t task_out_intr (ide_drive_t *drive) |
| 422 | { |
| 423 | ide_hwif_t *hwif = drive->hwif; |
| 424 | struct request *rq = HWGROUP(drive)->rq; |
| 425 | u8 stat = hwif->INB(IDE_STATUS_REG); |
| 426 | |
| 427 | if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat)) |
| 428 | return task_error(drive, rq, __FUNCTION__, stat); |
| 429 | |
| 430 | /* Deal with unexpected ATA data phase. */ |
| 431 | if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft) |
| 432 | return task_error(drive, rq, __FUNCTION__, stat); |
| 433 | |
| 434 | if (!hwif->nleft) { |
| 435 | task_end_request(drive, rq, stat); |
| 436 | return ide_stopped; |
| 437 | } |
| 438 | |
| 439 | /* Still data left to transfer. */ |
| 440 | ide_pio_datablock(drive, rq, 1); |
| 441 | ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL); |
| 442 | |
| 443 | return ide_started; |
| 444 | } |
| 445 | |
| 446 | ide_startstop_t pre_task_out_intr (ide_drive_t *drive, struct request *rq) |
| 447 | { |
| 448 | ide_startstop_t startstop; |
| 449 | |
| 450 | if (ide_wait_stat(&startstop, drive, DATA_READY, |
| 451 | drive->bad_wstat, WAIT_DRQ)) { |
| 452 | printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n", |
| 453 | drive->name, |
| 454 | drive->hwif->data_phase ? "MULT" : "", |
| 455 | drive->addressing ? "_EXT" : ""); |
| 456 | return startstop; |
| 457 | } |
| 458 | |
| 459 | if (!drive->unmask) |
| 460 | local_irq_disable(); |
| 461 | |
| 462 | ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL); |
| 463 | ide_pio_datablock(drive, rq, 1); |
| 464 | |
| 465 | return ide_started; |
| 466 | } |
| 467 | EXPORT_SYMBOL(pre_task_out_intr); |
| 468 | |
| 469 | static int ide_diag_taskfile(ide_drive_t *drive, ide_task_t *args, unsigned long data_size, u8 *buf) |
| 470 | { |
| 471 | struct request rq; |
| 472 | |
| 473 | memset(&rq, 0, sizeof(rq)); |
| 474 | rq.flags = REQ_DRIVE_TASKFILE; |
| 475 | rq.buffer = buf; |
| 476 | |
| 477 | /* |
| 478 | * (ks) We transfer currently only whole sectors. |
| 479 | * This is suffient for now. But, it would be great, |
| 480 | * if we would find a solution to transfer any size. |
| 481 | * To support special commands like READ LONG. |
| 482 | */ |
| 483 | if (args->command_type != IDE_DRIVE_TASK_NO_DATA) { |
| 484 | if (data_size == 0) |
| 485 | rq.nr_sectors = (args->hobRegister[IDE_NSECTOR_OFFSET] << 8) | args->tfRegister[IDE_NSECTOR_OFFSET]; |
| 486 | else |
| 487 | rq.nr_sectors = data_size / SECTOR_SIZE; |
| 488 | |
| 489 | if (!rq.nr_sectors) { |
| 490 | printk(KERN_ERR "%s: in/out command without data\n", |
| 491 | drive->name); |
| 492 | return -EFAULT; |
| 493 | } |
| 494 | |
| 495 | rq.hard_nr_sectors = rq.nr_sectors; |
| 496 | rq.hard_cur_sectors = rq.current_nr_sectors = rq.nr_sectors; |
| 497 | |
| 498 | if (args->command_type == IDE_DRIVE_TASK_RAW_WRITE) |
| 499 | rq.flags |= REQ_RW; |
| 500 | } |
| 501 | |
| 502 | rq.special = args; |
Timothy Thelin | ef0f6a43 | 2005-09-16 19:28:16 -0700 | [diff] [blame] | 503 | args->rq = &rq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | return ide_do_drive_cmd(drive, &rq, ide_wait); |
| 505 | } |
| 506 | |
| 507 | int ide_raw_taskfile (ide_drive_t *drive, ide_task_t *args, u8 *buf) |
| 508 | { |
| 509 | return ide_diag_taskfile(drive, args, 0, buf); |
| 510 | } |
| 511 | |
| 512 | EXPORT_SYMBOL(ide_raw_taskfile); |
| 513 | |
| 514 | int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg) |
| 515 | { |
| 516 | ide_task_request_t *req_task; |
| 517 | ide_task_t args; |
| 518 | u8 *outbuf = NULL; |
| 519 | u8 *inbuf = NULL; |
| 520 | task_ioreg_t *argsptr = args.tfRegister; |
| 521 | task_ioreg_t *hobsptr = args.hobRegister; |
| 522 | int err = 0; |
| 523 | int tasksize = sizeof(struct ide_task_request_s); |
| 524 | int taskin = 0; |
| 525 | int taskout = 0; |
| 526 | u8 io_32bit = drive->io_32bit; |
| 527 | char __user *buf = (char __user *)arg; |
| 528 | |
| 529 | // printk("IDE Taskfile ...\n"); |
| 530 | |
Deepak Saxena | f5e3c2f | 2005-11-07 01:01:25 -0800 | [diff] [blame] | 531 | req_task = kzalloc(tasksize, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | if (req_task == NULL) return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | if (copy_from_user(req_task, buf, tasksize)) { |
| 534 | kfree(req_task); |
| 535 | return -EFAULT; |
| 536 | } |
| 537 | |
| 538 | taskout = (int) req_task->out_size; |
| 539 | taskin = (int) req_task->in_size; |
| 540 | |
| 541 | if (taskout) { |
| 542 | int outtotal = tasksize; |
Deepak Saxena | f5e3c2f | 2005-11-07 01:01:25 -0800 | [diff] [blame] | 543 | outbuf = kzalloc(taskout, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | if (outbuf == NULL) { |
| 545 | err = -ENOMEM; |
| 546 | goto abort; |
| 547 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | if (copy_from_user(outbuf, buf + outtotal, taskout)) { |
| 549 | err = -EFAULT; |
| 550 | goto abort; |
| 551 | } |
| 552 | } |
| 553 | |
| 554 | if (taskin) { |
| 555 | int intotal = tasksize + taskout; |
Deepak Saxena | f5e3c2f | 2005-11-07 01:01:25 -0800 | [diff] [blame] | 556 | inbuf = kzalloc(taskin, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | if (inbuf == NULL) { |
| 558 | err = -ENOMEM; |
| 559 | goto abort; |
| 560 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | if (copy_from_user(inbuf, buf + intotal, taskin)) { |
| 562 | err = -EFAULT; |
| 563 | goto abort; |
| 564 | } |
| 565 | } |
| 566 | |
| 567 | memset(&args, 0, sizeof(ide_task_t)); |
| 568 | memcpy(argsptr, req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE); |
| 569 | memcpy(hobsptr, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE); |
| 570 | |
| 571 | args.tf_in_flags = req_task->in_flags; |
| 572 | args.tf_out_flags = req_task->out_flags; |
| 573 | args.data_phase = req_task->data_phase; |
| 574 | args.command_type = req_task->req_cmd; |
| 575 | |
| 576 | drive->io_32bit = 0; |
| 577 | switch(req_task->data_phase) { |
| 578 | case TASKFILE_OUT_DMAQ: |
| 579 | case TASKFILE_OUT_DMA: |
| 580 | err = ide_diag_taskfile(drive, &args, taskout, outbuf); |
| 581 | break; |
| 582 | case TASKFILE_IN_DMAQ: |
| 583 | case TASKFILE_IN_DMA: |
| 584 | err = ide_diag_taskfile(drive, &args, taskin, inbuf); |
| 585 | break; |
| 586 | case TASKFILE_MULTI_OUT: |
| 587 | if (!drive->mult_count) { |
| 588 | /* (hs): give up if multcount is not set */ |
| 589 | printk(KERN_ERR "%s: %s Multimode Write " \ |
| 590 | "multcount is not set\n", |
| 591 | drive->name, __FUNCTION__); |
| 592 | err = -EPERM; |
| 593 | goto abort; |
| 594 | } |
| 595 | /* fall through */ |
| 596 | case TASKFILE_OUT: |
| 597 | args.prehandler = &pre_task_out_intr; |
| 598 | args.handler = &task_out_intr; |
| 599 | err = ide_diag_taskfile(drive, &args, taskout, outbuf); |
| 600 | break; |
| 601 | case TASKFILE_MULTI_IN: |
| 602 | if (!drive->mult_count) { |
| 603 | /* (hs): give up if multcount is not set */ |
| 604 | printk(KERN_ERR "%s: %s Multimode Read failure " \ |
| 605 | "multcount is not set\n", |
| 606 | drive->name, __FUNCTION__); |
| 607 | err = -EPERM; |
| 608 | goto abort; |
| 609 | } |
| 610 | /* fall through */ |
| 611 | case TASKFILE_IN: |
| 612 | args.handler = &task_in_intr; |
| 613 | err = ide_diag_taskfile(drive, &args, taskin, inbuf); |
| 614 | break; |
| 615 | case TASKFILE_NO_DATA: |
| 616 | args.handler = &task_no_data_intr; |
| 617 | err = ide_diag_taskfile(drive, &args, 0, NULL); |
| 618 | break; |
| 619 | default: |
| 620 | err = -EFAULT; |
| 621 | goto abort; |
| 622 | } |
| 623 | |
| 624 | memcpy(req_task->io_ports, &(args.tfRegister), HDIO_DRIVE_TASK_HDR_SIZE); |
| 625 | memcpy(req_task->hob_ports, &(args.hobRegister), HDIO_DRIVE_HOB_HDR_SIZE); |
| 626 | req_task->in_flags = args.tf_in_flags; |
| 627 | req_task->out_flags = args.tf_out_flags; |
| 628 | |
| 629 | if (copy_to_user(buf, req_task, tasksize)) { |
| 630 | err = -EFAULT; |
| 631 | goto abort; |
| 632 | } |
| 633 | if (taskout) { |
| 634 | int outtotal = tasksize; |
| 635 | if (copy_to_user(buf + outtotal, outbuf, taskout)) { |
| 636 | err = -EFAULT; |
| 637 | goto abort; |
| 638 | } |
| 639 | } |
| 640 | if (taskin) { |
| 641 | int intotal = tasksize + taskout; |
| 642 | if (copy_to_user(buf + intotal, inbuf, taskin)) { |
| 643 | err = -EFAULT; |
| 644 | goto abort; |
| 645 | } |
| 646 | } |
| 647 | abort: |
| 648 | kfree(req_task); |
Jesper Juhl | 6044ec8 | 2005-11-07 01:01:32 -0800 | [diff] [blame] | 649 | kfree(outbuf); |
| 650 | kfree(inbuf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | |
| 652 | // printk("IDE Taskfile ioctl ended. rc = %i\n", err); |
| 653 | |
| 654 | drive->io_32bit = io_32bit; |
| 655 | |
| 656 | return err; |
| 657 | } |
| 658 | |
| 659 | int ide_wait_cmd (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf) |
| 660 | { |
| 661 | struct request rq; |
| 662 | u8 buffer[4]; |
| 663 | |
| 664 | if (!buf) |
| 665 | buf = buffer; |
| 666 | memset(buf, 0, 4 + SECTOR_WORDS * 4 * sectors); |
| 667 | ide_init_drive_cmd(&rq); |
| 668 | rq.buffer = buf; |
| 669 | *buf++ = cmd; |
| 670 | *buf++ = nsect; |
| 671 | *buf++ = feature; |
| 672 | *buf++ = sectors; |
| 673 | return ide_do_drive_cmd(drive, &rq, ide_wait); |
| 674 | } |
| 675 | |
| 676 | /* |
| 677 | * FIXME : this needs to map into at taskfile. <andre@linux-ide.org> |
| 678 | */ |
| 679 | int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg) |
| 680 | { |
| 681 | int err = 0; |
| 682 | u8 args[4], *argbuf = args; |
| 683 | u8 xfer_rate = 0; |
| 684 | int argsize = 4; |
| 685 | ide_task_t tfargs; |
| 686 | |
| 687 | if (NULL == (void *) arg) { |
| 688 | struct request rq; |
| 689 | ide_init_drive_cmd(&rq); |
| 690 | return ide_do_drive_cmd(drive, &rq, ide_wait); |
| 691 | } |
| 692 | |
| 693 | if (copy_from_user(args, (void __user *)arg, 4)) |
| 694 | return -EFAULT; |
| 695 | |
| 696 | memset(&tfargs, 0, sizeof(ide_task_t)); |
| 697 | tfargs.tfRegister[IDE_FEATURE_OFFSET] = args[2]; |
| 698 | tfargs.tfRegister[IDE_NSECTOR_OFFSET] = args[3]; |
| 699 | tfargs.tfRegister[IDE_SECTOR_OFFSET] = args[1]; |
| 700 | tfargs.tfRegister[IDE_LCYL_OFFSET] = 0x00; |
| 701 | tfargs.tfRegister[IDE_HCYL_OFFSET] = 0x00; |
| 702 | tfargs.tfRegister[IDE_SELECT_OFFSET] = 0x00; |
| 703 | tfargs.tfRegister[IDE_COMMAND_OFFSET] = args[0]; |
| 704 | |
| 705 | if (args[3]) { |
| 706 | argsize = 4 + (SECTOR_WORDS * 4 * args[3]); |
Deepak Saxena | f5e3c2f | 2005-11-07 01:01:25 -0800 | [diff] [blame] | 707 | argbuf = kzalloc(argsize, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | if (argbuf == NULL) |
| 709 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | } |
| 711 | if (set_transfer(drive, &tfargs)) { |
| 712 | xfer_rate = args[1]; |
| 713 | if (ide_ata66_check(drive, &tfargs)) |
| 714 | goto abort; |
| 715 | } |
| 716 | |
| 717 | err = ide_wait_cmd(drive, args[0], args[1], args[2], args[3], argbuf); |
| 718 | |
| 719 | if (!err && xfer_rate) { |
| 720 | /* active-retuning-calls future */ |
| 721 | ide_set_xfer_rate(drive, xfer_rate); |
| 722 | ide_driveid_update(drive); |
| 723 | } |
| 724 | abort: |
| 725 | if (copy_to_user((void __user *)arg, argbuf, argsize)) |
| 726 | err = -EFAULT; |
| 727 | if (argsize > 4) |
| 728 | kfree(argbuf); |
| 729 | return err; |
| 730 | } |
| 731 | |
| 732 | static int ide_wait_cmd_task(ide_drive_t *drive, u8 *buf) |
| 733 | { |
| 734 | struct request rq; |
| 735 | |
| 736 | ide_init_drive_cmd(&rq); |
| 737 | rq.flags = REQ_DRIVE_TASK; |
| 738 | rq.buffer = buf; |
| 739 | return ide_do_drive_cmd(drive, &rq, ide_wait); |
| 740 | } |
| 741 | |
| 742 | /* |
| 743 | * FIXME : this needs to map into at taskfile. <andre@linux-ide.org> |
| 744 | */ |
| 745 | int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg) |
| 746 | { |
| 747 | void __user *p = (void __user *)arg; |
| 748 | int err = 0; |
| 749 | u8 args[7], *argbuf = args; |
| 750 | int argsize = 7; |
| 751 | |
| 752 | if (copy_from_user(args, p, 7)) |
| 753 | return -EFAULT; |
| 754 | err = ide_wait_cmd_task(drive, argbuf); |
| 755 | if (copy_to_user(p, argbuf, argsize)) |
| 756 | err = -EFAULT; |
| 757 | return err; |
| 758 | } |
| 759 | |
| 760 | /* |
| 761 | * NOTICE: This is additions from IBM to provide a discrete interface, |
| 762 | * for selective taskregister access operations. Nice JOB Klaus!!! |
| 763 | * Glad to be able to work and co-develop this with you and IBM. |
| 764 | */ |
| 765 | ide_startstop_t flagged_taskfile (ide_drive_t *drive, ide_task_t *task) |
| 766 | { |
| 767 | ide_hwif_t *hwif = HWIF(drive); |
| 768 | task_struct_t *taskfile = (task_struct_t *) task->tfRegister; |
| 769 | hob_struct_t *hobfile = (hob_struct_t *) task->hobRegister; |
| 770 | #if DEBUG_TASKFILE |
| 771 | u8 status; |
| 772 | #endif |
| 773 | |
| 774 | if (task->data_phase == TASKFILE_MULTI_IN || |
| 775 | task->data_phase == TASKFILE_MULTI_OUT) { |
| 776 | if (!drive->mult_count) { |
| 777 | printk(KERN_ERR "%s: multimode not set!\n", drive->name); |
| 778 | return ide_stopped; |
| 779 | } |
| 780 | } |
| 781 | |
| 782 | /* |
| 783 | * (ks) Check taskfile in/out flags. |
| 784 | * If set, then execute as it is defined. |
| 785 | * If not set, then define default settings. |
| 786 | * The default values are: |
| 787 | * write and read all taskfile registers (except data) |
| 788 | * write and read the hob registers (sector,nsector,lcyl,hcyl) |
| 789 | */ |
| 790 | if (task->tf_out_flags.all == 0) { |
| 791 | task->tf_out_flags.all = IDE_TASKFILE_STD_OUT_FLAGS; |
| 792 | if (drive->addressing == 1) |
| 793 | task->tf_out_flags.all |= (IDE_HOB_STD_OUT_FLAGS << 8); |
| 794 | } |
| 795 | |
| 796 | if (task->tf_in_flags.all == 0) { |
| 797 | task->tf_in_flags.all = IDE_TASKFILE_STD_IN_FLAGS; |
| 798 | if (drive->addressing == 1) |
| 799 | task->tf_in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8); |
| 800 | } |
| 801 | |
| 802 | /* ALL Command Block Executions SHALL clear nIEN, unless otherwise */ |
| 803 | if (IDE_CONTROL_REG) |
| 804 | /* clear nIEN */ |
| 805 | hwif->OUTB(drive->ctl, IDE_CONTROL_REG); |
| 806 | SELECT_MASK(drive, 0); |
| 807 | |
| 808 | #if DEBUG_TASKFILE |
| 809 | status = hwif->INB(IDE_STATUS_REG); |
| 810 | if (status & 0x80) { |
| 811 | printk("flagged_taskfile -> Bad status. Status = %02x. wait 100 usec ...\n", status); |
| 812 | udelay(100); |
| 813 | status = hwif->INB(IDE_STATUS_REG); |
| 814 | printk("flagged_taskfile -> Status = %02x\n", status); |
| 815 | } |
| 816 | #endif |
| 817 | |
| 818 | if (task->tf_out_flags.b.data) { |
| 819 | u16 data = taskfile->data + (hobfile->data << 8); |
| 820 | hwif->OUTW(data, IDE_DATA_REG); |
| 821 | } |
| 822 | |
| 823 | /* (ks) send hob registers first */ |
| 824 | if (task->tf_out_flags.b.nsector_hob) |
| 825 | hwif->OUTB(hobfile->sector_count, IDE_NSECTOR_REG); |
| 826 | if (task->tf_out_flags.b.sector_hob) |
| 827 | hwif->OUTB(hobfile->sector_number, IDE_SECTOR_REG); |
| 828 | if (task->tf_out_flags.b.lcyl_hob) |
| 829 | hwif->OUTB(hobfile->low_cylinder, IDE_LCYL_REG); |
| 830 | if (task->tf_out_flags.b.hcyl_hob) |
| 831 | hwif->OUTB(hobfile->high_cylinder, IDE_HCYL_REG); |
| 832 | |
| 833 | /* (ks) Send now the standard registers */ |
| 834 | if (task->tf_out_flags.b.error_feature) |
| 835 | hwif->OUTB(taskfile->feature, IDE_FEATURE_REG); |
| 836 | /* refers to number of sectors to transfer */ |
| 837 | if (task->tf_out_flags.b.nsector) |
| 838 | hwif->OUTB(taskfile->sector_count, IDE_NSECTOR_REG); |
| 839 | /* refers to sector offset or start sector */ |
| 840 | if (task->tf_out_flags.b.sector) |
| 841 | hwif->OUTB(taskfile->sector_number, IDE_SECTOR_REG); |
| 842 | if (task->tf_out_flags.b.lcyl) |
| 843 | hwif->OUTB(taskfile->low_cylinder, IDE_LCYL_REG); |
| 844 | if (task->tf_out_flags.b.hcyl) |
| 845 | hwif->OUTB(taskfile->high_cylinder, IDE_HCYL_REG); |
| 846 | |
| 847 | /* |
| 848 | * (ks) In the flagged taskfile approch, we will use all specified |
| 849 | * registers and the register value will not be changed, except the |
| 850 | * select bit (master/slave) in the drive_head register. We must make |
| 851 | * sure that the desired drive is selected. |
| 852 | */ |
| 853 | hwif->OUTB(taskfile->device_head | drive->select.all, IDE_SELECT_REG); |
| 854 | switch(task->data_phase) { |
| 855 | |
| 856 | case TASKFILE_OUT_DMAQ: |
| 857 | case TASKFILE_OUT_DMA: |
| 858 | case TASKFILE_IN_DMAQ: |
| 859 | case TASKFILE_IN_DMA: |
| 860 | hwif->dma_setup(drive); |
| 861 | hwif->dma_exec_cmd(drive, taskfile->command); |
| 862 | hwif->dma_start(drive); |
| 863 | break; |
| 864 | |
| 865 | default: |
| 866 | if (task->handler == NULL) |
| 867 | return ide_stopped; |
| 868 | |
| 869 | /* Issue the command */ |
| 870 | if (task->prehandler) { |
| 871 | hwif->OUTBSYNC(drive, taskfile->command, IDE_COMMAND_REG); |
| 872 | ndelay(400); /* FIXME */ |
| 873 | return task->prehandler(drive, task->rq); |
| 874 | } |
| 875 | ide_execute_command(drive, taskfile->command, task->handler, WAIT_WORSTCASE, NULL); |
| 876 | } |
| 877 | |
| 878 | return ide_started; |
| 879 | } |