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1da177e4 LT |
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. | |
1da177e4 LT |
11 | */ |
12 | ||
1da177e4 LT |
13 | #include <linux/module.h> |
14 | #include <linux/types.h> | |
15 | #include <linux/string.h> | |
16 | #include <linux/kernel.h> | |
17 | #include <linux/timer.h> | |
18 | #include <linux/mm.h> | |
651c29a1 | 19 | #include <linux/sched.h> |
1da177e4 LT |
20 | #include <linux/interrupt.h> |
21 | #include <linux/major.h> | |
22 | #include <linux/errno.h> | |
23 | #include <linux/genhd.h> | |
24 | #include <linux/blkpg.h> | |
25 | #include <linux/slab.h> | |
26 | #include <linux/pci.h> | |
27 | #include <linux/delay.h> | |
28 | #include <linux/hdreg.h> | |
29 | #include <linux/ide.h> | |
30 | #include <linux/bitops.h> | |
55c16a70 | 31 | #include <linux/scatterlist.h> |
1da177e4 LT |
32 | |
33 | #include <asm/byteorder.h> | |
34 | #include <asm/irq.h> | |
35 | #include <asm/uaccess.h> | |
36 | #include <asm/io.h> | |
37 | ||
1da177e4 LT |
38 | static void ata_bswap_data (void *buffer, int wcount) |
39 | { | |
40 | u16 *p = buffer; | |
41 | ||
42 | while (wcount--) { | |
43 | *p = *p << 8 | *p >> 8; p++; | |
44 | *p = *p << 8 | *p >> 8; p++; | |
45 | } | |
46 | } | |
47 | ||
48 | static void taskfile_input_data(ide_drive_t *drive, void *buffer, u32 wcount) | |
49 | { | |
50 | HWIF(drive)->ata_input_data(drive, buffer, wcount); | |
51 | if (drive->bswap) | |
52 | ata_bswap_data(buffer, wcount); | |
53 | } | |
54 | ||
55 | static void taskfile_output_data(ide_drive_t *drive, void *buffer, u32 wcount) | |
56 | { | |
57 | if (drive->bswap) { | |
58 | ata_bswap_data(buffer, wcount); | |
59 | HWIF(drive)->ata_output_data(drive, buffer, wcount); | |
60 | ata_bswap_data(buffer, wcount); | |
61 | } else { | |
62 | HWIF(drive)->ata_output_data(drive, buffer, wcount); | |
63 | } | |
64 | } | |
65 | ||
66 | int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf) | |
67 | { | |
68 | ide_task_t args; | |
69 | memset(&args, 0, sizeof(ide_task_t)); | |
70 | args.tfRegister[IDE_NSECTOR_OFFSET] = 0x01; | |
71 | if (drive->media == ide_disk) | |
72 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_IDENTIFY; | |
73 | else | |
74 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_PIDENTIFY; | |
75 | args.command_type = IDE_DRIVE_TASK_IN; | |
76 | args.data_phase = TASKFILE_IN; | |
77 | args.handler = &task_in_intr; | |
78 | return ide_raw_taskfile(drive, &args, buf); | |
79 | } | |
80 | ||
81 | ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task) | |
82 | { | |
83 | ide_hwif_t *hwif = HWIF(drive); | |
84 | task_struct_t *taskfile = (task_struct_t *) task->tfRegister; | |
85 | hob_struct_t *hobfile = (hob_struct_t *) task->hobRegister; | |
86 | u8 HIHI = (drive->addressing == 1) ? 0xE0 : 0xEF; | |
87 | ||
88 | /* ALL Command Block Executions SHALL clear nIEN, unless otherwise */ | |
89 | if (IDE_CONTROL_REG) { | |
90 | /* clear nIEN */ | |
91 | hwif->OUTB(drive->ctl, IDE_CONTROL_REG); | |
92 | } | |
93 | SELECT_MASK(drive, 0); | |
94 | ||
95 | if (drive->addressing == 1) { | |
96 | hwif->OUTB(hobfile->feature, IDE_FEATURE_REG); | |
97 | hwif->OUTB(hobfile->sector_count, IDE_NSECTOR_REG); | |
98 | hwif->OUTB(hobfile->sector_number, IDE_SECTOR_REG); | |
99 | hwif->OUTB(hobfile->low_cylinder, IDE_LCYL_REG); | |
100 | hwif->OUTB(hobfile->high_cylinder, IDE_HCYL_REG); | |
101 | } | |
102 | ||
103 | hwif->OUTB(taskfile->feature, IDE_FEATURE_REG); | |
104 | hwif->OUTB(taskfile->sector_count, IDE_NSECTOR_REG); | |
105 | hwif->OUTB(taskfile->sector_number, IDE_SECTOR_REG); | |
106 | hwif->OUTB(taskfile->low_cylinder, IDE_LCYL_REG); | |
107 | hwif->OUTB(taskfile->high_cylinder, IDE_HCYL_REG); | |
108 | ||
109 | hwif->OUTB((taskfile->device_head & HIHI) | drive->select.all, IDE_SELECT_REG); | |
110 | ||
111 | if (task->handler != NULL) { | |
112 | if (task->prehandler != NULL) { | |
113 | hwif->OUTBSYNC(drive, taskfile->command, IDE_COMMAND_REG); | |
114 | ndelay(400); /* FIXME */ | |
115 | return task->prehandler(drive, task->rq); | |
116 | } | |
117 | ide_execute_command(drive, taskfile->command, task->handler, WAIT_WORSTCASE, NULL); | |
118 | return ide_started; | |
119 | } | |
120 | ||
121 | if (!drive->using_dma) | |
122 | return ide_stopped; | |
123 | ||
124 | switch (taskfile->command) { | |
125 | case WIN_WRITEDMA_ONCE: | |
126 | case WIN_WRITEDMA: | |
127 | case WIN_WRITEDMA_EXT: | |
128 | case WIN_READDMA_ONCE: | |
129 | case WIN_READDMA: | |
130 | case WIN_READDMA_EXT: | |
131 | case WIN_IDENTIFY_DMA: | |
132 | if (!hwif->dma_setup(drive)) { | |
133 | hwif->dma_exec_cmd(drive, taskfile->command); | |
134 | hwif->dma_start(drive); | |
135 | return ide_started; | |
136 | } | |
137 | break; | |
138 | default: | |
139 | if (task->handler == NULL) | |
140 | return ide_stopped; | |
141 | } | |
142 | ||
143 | return ide_stopped; | |
144 | } | |
145 | ||
1da177e4 LT |
146 | /* |
147 | * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd. | |
148 | */ | |
149 | ide_startstop_t set_multmode_intr (ide_drive_t *drive) | |
150 | { | |
151 | ide_hwif_t *hwif = HWIF(drive); | |
152 | u8 stat; | |
153 | ||
154 | if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) { | |
155 | drive->mult_count = drive->mult_req; | |
156 | } else { | |
157 | drive->mult_req = drive->mult_count = 0; | |
158 | drive->special.b.recalibrate = 1; | |
159 | (void) ide_dump_status(drive, "set_multmode", stat); | |
160 | } | |
161 | return ide_stopped; | |
162 | } | |
163 | ||
164 | /* | |
165 | * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd. | |
166 | */ | |
167 | ide_startstop_t set_geometry_intr (ide_drive_t *drive) | |
168 | { | |
169 | ide_hwif_t *hwif = HWIF(drive); | |
170 | int retries = 5; | |
171 | u8 stat; | |
172 | ||
173 | while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--) | |
174 | udelay(10); | |
175 | ||
176 | if (OK_STAT(stat, READY_STAT, BAD_STAT)) | |
177 | return ide_stopped; | |
178 | ||
179 | if (stat & (ERR_STAT|DRQ_STAT)) | |
180 | return ide_error(drive, "set_geometry_intr", stat); | |
181 | ||
125e1874 | 182 | BUG_ON(HWGROUP(drive)->handler != NULL); |
1da177e4 LT |
183 | ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL); |
184 | return ide_started; | |
185 | } | |
186 | ||
187 | /* | |
188 | * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd. | |
189 | */ | |
190 | ide_startstop_t recal_intr (ide_drive_t *drive) | |
191 | { | |
192 | ide_hwif_t *hwif = HWIF(drive); | |
193 | u8 stat; | |
194 | ||
195 | if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT)) | |
196 | return ide_error(drive, "recal_intr", stat); | |
197 | return ide_stopped; | |
198 | } | |
199 | ||
200 | /* | |
201 | * Handler for commands without a data phase | |
202 | */ | |
203 | ide_startstop_t task_no_data_intr (ide_drive_t *drive) | |
204 | { | |
205 | ide_task_t *args = HWGROUP(drive)->rq->special; | |
206 | ide_hwif_t *hwif = HWIF(drive); | |
207 | u8 stat; | |
208 | ||
366c7f55 | 209 | local_irq_enable_in_hardirq(); |
1da177e4 LT |
210 | if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) { |
211 | return ide_error(drive, "task_no_data_intr", stat); | |
212 | /* calls ide_end_drive_cmd */ | |
213 | } | |
214 | if (args) | |
215 | ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG)); | |
216 | ||
217 | return ide_stopped; | |
218 | } | |
219 | ||
220 | EXPORT_SYMBOL(task_no_data_intr); | |
221 | ||
222 | static u8 wait_drive_not_busy(ide_drive_t *drive) | |
223 | { | |
224 | ide_hwif_t *hwif = HWIF(drive); | |
b42fa133 | 225 | int retries; |
1da177e4 LT |
226 | u8 stat; |
227 | ||
228 | /* | |
229 | * Last sector was transfered, wait until drive is ready. | |
230 | * This can take up to 10 usec, but we will wait max 1 ms | |
231 | * (drive_cmd_intr() waits that long). | |
232 | */ | |
b42fa133 MY |
233 | for (retries = 0; retries < 100; retries++) { |
234 | if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) | |
235 | udelay(10); | |
236 | else | |
237 | break; | |
238 | } | |
1da177e4 | 239 | |
b42fa133 | 240 | if (stat & BUSY_STAT) |
1da177e4 LT |
241 | printk(KERN_ERR "%s: drive still BUSY!\n", drive->name); |
242 | ||
243 | return stat; | |
244 | } | |
245 | ||
246 | static void ide_pio_sector(ide_drive_t *drive, unsigned int write) | |
247 | { | |
248 | ide_hwif_t *hwif = drive->hwif; | |
249 | struct scatterlist *sg = hwif->sg_table; | |
55c16a70 | 250 | struct scatterlist *cursg = hwif->cursg; |
1da177e4 LT |
251 | struct page *page; |
252 | #ifdef CONFIG_HIGHMEM | |
253 | unsigned long flags; | |
254 | #endif | |
255 | unsigned int offset; | |
256 | u8 *buf; | |
257 | ||
55c16a70 JA |
258 | cursg = hwif->cursg; |
259 | if (!cursg) { | |
260 | cursg = sg; | |
261 | hwif->cursg = sg; | |
262 | } | |
263 | ||
45711f1a | 264 | page = sg_page(cursg); |
55c16a70 | 265 | offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE; |
1da177e4 LT |
266 | |
267 | /* get the current page and offset */ | |
268 | page = nth_page(page, (offset >> PAGE_SHIFT)); | |
269 | offset %= PAGE_SIZE; | |
270 | ||
271 | #ifdef CONFIG_HIGHMEM | |
272 | local_irq_save(flags); | |
273 | #endif | |
274 | buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset; | |
275 | ||
276 | hwif->nleft--; | |
277 | hwif->cursg_ofs++; | |
278 | ||
55c16a70 JA |
279 | if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) { |
280 | hwif->cursg = sg_next(hwif->cursg); | |
1da177e4 LT |
281 | hwif->cursg_ofs = 0; |
282 | } | |
283 | ||
284 | /* do the actual data transfer */ | |
285 | if (write) | |
286 | taskfile_output_data(drive, buf, SECTOR_WORDS); | |
287 | else | |
288 | taskfile_input_data(drive, buf, SECTOR_WORDS); | |
289 | ||
290 | kunmap_atomic(buf, KM_BIO_SRC_IRQ); | |
291 | #ifdef CONFIG_HIGHMEM | |
292 | local_irq_restore(flags); | |
293 | #endif | |
294 | } | |
295 | ||
296 | static void ide_pio_multi(ide_drive_t *drive, unsigned int write) | |
297 | { | |
298 | unsigned int nsect; | |
299 | ||
300 | nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count); | |
301 | while (nsect--) | |
302 | ide_pio_sector(drive, write); | |
303 | } | |
304 | ||
858119e1 | 305 | static void ide_pio_datablock(ide_drive_t *drive, struct request *rq, |
1da177e4 LT |
306 | unsigned int write) |
307 | { | |
308 | if (rq->bio) /* fs request */ | |
309 | rq->errors = 0; | |
310 | ||
651c29a1 AM |
311 | touch_softlockup_watchdog(); |
312 | ||
1da177e4 LT |
313 | switch (drive->hwif->data_phase) { |
314 | case TASKFILE_MULTI_IN: | |
315 | case TASKFILE_MULTI_OUT: | |
316 | ide_pio_multi(drive, write); | |
317 | break; | |
318 | default: | |
319 | ide_pio_sector(drive, write); | |
320 | break; | |
321 | } | |
322 | } | |
323 | ||
324 | static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq, | |
325 | const char *s, u8 stat) | |
326 | { | |
327 | if (rq->bio) { | |
328 | ide_hwif_t *hwif = drive->hwif; | |
329 | int sectors = hwif->nsect - hwif->nleft; | |
330 | ||
331 | switch (hwif->data_phase) { | |
332 | case TASKFILE_IN: | |
333 | if (hwif->nleft) | |
334 | break; | |
335 | /* fall through */ | |
336 | case TASKFILE_OUT: | |
337 | sectors--; | |
338 | break; | |
339 | case TASKFILE_MULTI_IN: | |
340 | if (hwif->nleft) | |
341 | break; | |
342 | /* fall through */ | |
343 | case TASKFILE_MULTI_OUT: | |
344 | sectors -= drive->mult_count; | |
345 | default: | |
346 | break; | |
347 | } | |
348 | ||
349 | if (sectors > 0) { | |
350 | ide_driver_t *drv; | |
351 | ||
352 | drv = *(ide_driver_t **)rq->rq_disk->private_data; | |
353 | drv->end_request(drive, 1, sectors); | |
354 | } | |
355 | } | |
356 | return ide_error(drive, s, stat); | |
357 | } | |
358 | ||
359 | static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat) | |
360 | { | |
55c16a70 JA |
361 | HWIF(drive)->cursg = NULL; |
362 | ||
4aff5e23 | 363 | if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) { |
1da177e4 LT |
364 | ide_task_t *task = rq->special; |
365 | ||
366 | if (task->tf_out_flags.all) { | |
367 | u8 err = drive->hwif->INB(IDE_ERROR_REG); | |
368 | ide_end_drive_cmd(drive, stat, err); | |
369 | return; | |
370 | } | |
371 | } | |
372 | ||
03731fbd RP |
373 | if (rq->rq_disk) { |
374 | ide_driver_t *drv; | |
375 | ||
376 | drv = *(ide_driver_t **)rq->rq_disk->private_data;; | |
377 | drv->end_request(drive, 1, rq->hard_nr_sectors); | |
378 | } else | |
379 | ide_end_request(drive, 1, rq->hard_nr_sectors); | |
1da177e4 LT |
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)); | |
02ac2460 | 474 | rq.ref_count = 1; |
4aff5e23 | 475 | rq.cmd_type = REQ_TYPE_ATA_TASKFILE; |
1da177e4 LT |
476 | rq.buffer = buf; |
477 | ||
478 | /* | |
479 | * (ks) We transfer currently only whole sectors. | |
480 | * This is suffient for now. But, it would be great, | |
481 | * if we would find a solution to transfer any size. | |
482 | * To support special commands like READ LONG. | |
483 | */ | |
484 | if (args->command_type != IDE_DRIVE_TASK_NO_DATA) { | |
485 | if (data_size == 0) | |
486 | rq.nr_sectors = (args->hobRegister[IDE_NSECTOR_OFFSET] << 8) | args->tfRegister[IDE_NSECTOR_OFFSET]; | |
487 | else | |
488 | rq.nr_sectors = data_size / SECTOR_SIZE; | |
489 | ||
490 | if (!rq.nr_sectors) { | |
491 | printk(KERN_ERR "%s: in/out command without data\n", | |
492 | drive->name); | |
493 | return -EFAULT; | |
494 | } | |
495 | ||
496 | rq.hard_nr_sectors = rq.nr_sectors; | |
497 | rq.hard_cur_sectors = rq.current_nr_sectors = rq.nr_sectors; | |
498 | ||
499 | if (args->command_type == IDE_DRIVE_TASK_RAW_WRITE) | |
4aff5e23 | 500 | rq.cmd_flags |= REQ_RW; |
1da177e4 LT |
501 | } |
502 | ||
503 | rq.special = args; | |
ef0f6a43 | 504 | args->rq = &rq; |
1da177e4 LT |
505 | return ide_do_drive_cmd(drive, &rq, ide_wait); |
506 | } | |
507 | ||
508 | int ide_raw_taskfile (ide_drive_t *drive, ide_task_t *args, u8 *buf) | |
509 | { | |
510 | return ide_diag_taskfile(drive, args, 0, buf); | |
511 | } | |
512 | ||
513 | EXPORT_SYMBOL(ide_raw_taskfile); | |
514 | ||
515 | int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg) | |
516 | { | |
517 | ide_task_request_t *req_task; | |
518 | ide_task_t args; | |
519 | u8 *outbuf = NULL; | |
520 | u8 *inbuf = NULL; | |
521 | task_ioreg_t *argsptr = args.tfRegister; | |
522 | task_ioreg_t *hobsptr = args.hobRegister; | |
523 | int err = 0; | |
524 | int tasksize = sizeof(struct ide_task_request_s); | |
3a42bb22 AC |
525 | unsigned int taskin = 0; |
526 | unsigned int taskout = 0; | |
1da177e4 LT |
527 | u8 io_32bit = drive->io_32bit; |
528 | char __user *buf = (char __user *)arg; | |
529 | ||
530 | // printk("IDE Taskfile ...\n"); | |
531 | ||
f5e3c2fa | 532 | req_task = kzalloc(tasksize, GFP_KERNEL); |
1da177e4 | 533 | if (req_task == NULL) return -ENOMEM; |
1da177e4 LT |
534 | if (copy_from_user(req_task, buf, tasksize)) { |
535 | kfree(req_task); | |
536 | return -EFAULT; | |
537 | } | |
538 | ||
3a42bb22 AC |
539 | taskout = req_task->out_size; |
540 | taskin = req_task->in_size; | |
541 | ||
542 | if (taskin > 65536 || taskout > 65536) { | |
543 | err = -EINVAL; | |
544 | goto abort; | |
545 | } | |
1da177e4 LT |
546 | |
547 | if (taskout) { | |
548 | int outtotal = tasksize; | |
f5e3c2fa | 549 | outbuf = kzalloc(taskout, GFP_KERNEL); |
1da177e4 LT |
550 | if (outbuf == NULL) { |
551 | err = -ENOMEM; | |
552 | goto abort; | |
553 | } | |
1da177e4 LT |
554 | if (copy_from_user(outbuf, buf + outtotal, taskout)) { |
555 | err = -EFAULT; | |
556 | goto abort; | |
557 | } | |
558 | } | |
559 | ||
560 | if (taskin) { | |
561 | int intotal = tasksize + taskout; | |
f5e3c2fa | 562 | inbuf = kzalloc(taskin, GFP_KERNEL); |
1da177e4 LT |
563 | if (inbuf == NULL) { |
564 | err = -ENOMEM; | |
565 | goto abort; | |
566 | } | |
1da177e4 LT |
567 | if (copy_from_user(inbuf, buf + intotal, taskin)) { |
568 | err = -EFAULT; | |
569 | goto abort; | |
570 | } | |
571 | } | |
572 | ||
573 | memset(&args, 0, sizeof(ide_task_t)); | |
574 | memcpy(argsptr, req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE); | |
575 | memcpy(hobsptr, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE); | |
576 | ||
577 | args.tf_in_flags = req_task->in_flags; | |
578 | args.tf_out_flags = req_task->out_flags; | |
579 | args.data_phase = req_task->data_phase; | |
580 | args.command_type = req_task->req_cmd; | |
581 | ||
582 | drive->io_32bit = 0; | |
583 | switch(req_task->data_phase) { | |
584 | case TASKFILE_OUT_DMAQ: | |
585 | case TASKFILE_OUT_DMA: | |
586 | err = ide_diag_taskfile(drive, &args, taskout, outbuf); | |
587 | break; | |
588 | case TASKFILE_IN_DMAQ: | |
589 | case TASKFILE_IN_DMA: | |
590 | err = ide_diag_taskfile(drive, &args, taskin, inbuf); | |
591 | break; | |
592 | case TASKFILE_MULTI_OUT: | |
593 | if (!drive->mult_count) { | |
594 | /* (hs): give up if multcount is not set */ | |
595 | printk(KERN_ERR "%s: %s Multimode Write " \ | |
596 | "multcount is not set\n", | |
597 | drive->name, __FUNCTION__); | |
598 | err = -EPERM; | |
599 | goto abort; | |
600 | } | |
601 | /* fall through */ | |
602 | case TASKFILE_OUT: | |
603 | args.prehandler = &pre_task_out_intr; | |
604 | args.handler = &task_out_intr; | |
605 | err = ide_diag_taskfile(drive, &args, taskout, outbuf); | |
606 | break; | |
607 | case TASKFILE_MULTI_IN: | |
608 | if (!drive->mult_count) { | |
609 | /* (hs): give up if multcount is not set */ | |
610 | printk(KERN_ERR "%s: %s Multimode Read failure " \ | |
611 | "multcount is not set\n", | |
612 | drive->name, __FUNCTION__); | |
613 | err = -EPERM; | |
614 | goto abort; | |
615 | } | |
616 | /* fall through */ | |
617 | case TASKFILE_IN: | |
618 | args.handler = &task_in_intr; | |
619 | err = ide_diag_taskfile(drive, &args, taskin, inbuf); | |
620 | break; | |
621 | case TASKFILE_NO_DATA: | |
622 | args.handler = &task_no_data_intr; | |
623 | err = ide_diag_taskfile(drive, &args, 0, NULL); | |
624 | break; | |
625 | default: | |
626 | err = -EFAULT; | |
627 | goto abort; | |
628 | } | |
629 | ||
630 | memcpy(req_task->io_ports, &(args.tfRegister), HDIO_DRIVE_TASK_HDR_SIZE); | |
631 | memcpy(req_task->hob_ports, &(args.hobRegister), HDIO_DRIVE_HOB_HDR_SIZE); | |
632 | req_task->in_flags = args.tf_in_flags; | |
633 | req_task->out_flags = args.tf_out_flags; | |
634 | ||
635 | if (copy_to_user(buf, req_task, tasksize)) { | |
636 | err = -EFAULT; | |
637 | goto abort; | |
638 | } | |
639 | if (taskout) { | |
640 | int outtotal = tasksize; | |
641 | if (copy_to_user(buf + outtotal, outbuf, taskout)) { | |
642 | err = -EFAULT; | |
643 | goto abort; | |
644 | } | |
645 | } | |
646 | if (taskin) { | |
647 | int intotal = tasksize + taskout; | |
648 | if (copy_to_user(buf + intotal, inbuf, taskin)) { | |
649 | err = -EFAULT; | |
650 | goto abort; | |
651 | } | |
652 | } | |
653 | abort: | |
654 | kfree(req_task); | |
6044ec88 JJ |
655 | kfree(outbuf); |
656 | kfree(inbuf); | |
1da177e4 LT |
657 | |
658 | // printk("IDE Taskfile ioctl ended. rc = %i\n", err); | |
659 | ||
660 | drive->io_32bit = io_32bit; | |
661 | ||
662 | return err; | |
663 | } | |
664 | ||
665 | int ide_wait_cmd (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf) | |
666 | { | |
667 | struct request rq; | |
668 | u8 buffer[4]; | |
669 | ||
670 | if (!buf) | |
671 | buf = buffer; | |
672 | memset(buf, 0, 4 + SECTOR_WORDS * 4 * sectors); | |
673 | ide_init_drive_cmd(&rq); | |
674 | rq.buffer = buf; | |
675 | *buf++ = cmd; | |
676 | *buf++ = nsect; | |
677 | *buf++ = feature; | |
678 | *buf++ = sectors; | |
679 | return ide_do_drive_cmd(drive, &rq, ide_wait); | |
680 | } | |
681 | ||
1da177e4 LT |
682 | int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg) |
683 | { | |
684 | int err = 0; | |
685 | u8 args[4], *argbuf = args; | |
686 | u8 xfer_rate = 0; | |
687 | int argsize = 4; | |
688 | ide_task_t tfargs; | |
689 | ||
690 | if (NULL == (void *) arg) { | |
691 | struct request rq; | |
692 | ide_init_drive_cmd(&rq); | |
693 | return ide_do_drive_cmd(drive, &rq, ide_wait); | |
694 | } | |
695 | ||
696 | if (copy_from_user(args, (void __user *)arg, 4)) | |
697 | return -EFAULT; | |
698 | ||
699 | memset(&tfargs, 0, sizeof(ide_task_t)); | |
700 | tfargs.tfRegister[IDE_FEATURE_OFFSET] = args[2]; | |
701 | tfargs.tfRegister[IDE_NSECTOR_OFFSET] = args[3]; | |
702 | tfargs.tfRegister[IDE_SECTOR_OFFSET] = args[1]; | |
703 | tfargs.tfRegister[IDE_LCYL_OFFSET] = 0x00; | |
704 | tfargs.tfRegister[IDE_HCYL_OFFSET] = 0x00; | |
705 | tfargs.tfRegister[IDE_SELECT_OFFSET] = 0x00; | |
706 | tfargs.tfRegister[IDE_COMMAND_OFFSET] = args[0]; | |
707 | ||
708 | if (args[3]) { | |
709 | argsize = 4 + (SECTOR_WORDS * 4 * args[3]); | |
f5e3c2fa | 710 | argbuf = kzalloc(argsize, GFP_KERNEL); |
1da177e4 LT |
711 | if (argbuf == NULL) |
712 | return -ENOMEM; | |
1da177e4 LT |
713 | } |
714 | if (set_transfer(drive, &tfargs)) { | |
715 | xfer_rate = args[1]; | |
716 | if (ide_ata66_check(drive, &tfargs)) | |
717 | goto abort; | |
718 | } | |
719 | ||
720 | err = ide_wait_cmd(drive, args[0], args[1], args[2], args[3], argbuf); | |
721 | ||
722 | if (!err && xfer_rate) { | |
723 | /* active-retuning-calls future */ | |
724 | ide_set_xfer_rate(drive, xfer_rate); | |
725 | ide_driveid_update(drive); | |
726 | } | |
727 | abort: | |
728 | if (copy_to_user((void __user *)arg, argbuf, argsize)) | |
729 | err = -EFAULT; | |
730 | if (argsize > 4) | |
731 | kfree(argbuf); | |
732 | return err; | |
733 | } | |
734 | ||
735 | static int ide_wait_cmd_task(ide_drive_t *drive, u8 *buf) | |
736 | { | |
737 | struct request rq; | |
738 | ||
739 | ide_init_drive_cmd(&rq); | |
4aff5e23 | 740 | rq.cmd_type = REQ_TYPE_ATA_TASK; |
1da177e4 LT |
741 | rq.buffer = buf; |
742 | return ide_do_drive_cmd(drive, &rq, ide_wait); | |
743 | } | |
744 | ||
1da177e4 LT |
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; | |
1da177e4 LT |
770 | |
771 | if (task->data_phase == TASKFILE_MULTI_IN || | |
772 | task->data_phase == TASKFILE_MULTI_OUT) { | |
773 | if (!drive->mult_count) { | |
774 | printk(KERN_ERR "%s: multimode not set!\n", drive->name); | |
775 | return ide_stopped; | |
776 | } | |
777 | } | |
778 | ||
779 | /* | |
e07bc709 | 780 | * (ks) Check taskfile in flags. |
1da177e4 LT |
781 | * If set, then execute as it is defined. |
782 | * If not set, then define default settings. | |
783 | * The default values are: | |
e07bc709 BZ |
784 | * read all taskfile registers (except data) |
785 | * read the hob registers (sector, nsector, lcyl, hcyl) | |
1da177e4 | 786 | */ |
1da177e4 LT |
787 | if (task->tf_in_flags.all == 0) { |
788 | task->tf_in_flags.all = IDE_TASKFILE_STD_IN_FLAGS; | |
789 | if (drive->addressing == 1) | |
790 | task->tf_in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8); | |
791 | } | |
792 | ||
793 | /* ALL Command Block Executions SHALL clear nIEN, unless otherwise */ | |
794 | if (IDE_CONTROL_REG) | |
795 | /* clear nIEN */ | |
796 | hwif->OUTB(drive->ctl, IDE_CONTROL_REG); | |
797 | SELECT_MASK(drive, 0); | |
798 | ||
1da177e4 LT |
799 | if (task->tf_out_flags.b.data) { |
800 | u16 data = taskfile->data + (hobfile->data << 8); | |
801 | hwif->OUTW(data, IDE_DATA_REG); | |
802 | } | |
803 | ||
804 | /* (ks) send hob registers first */ | |
805 | if (task->tf_out_flags.b.nsector_hob) | |
806 | hwif->OUTB(hobfile->sector_count, IDE_NSECTOR_REG); | |
807 | if (task->tf_out_flags.b.sector_hob) | |
808 | hwif->OUTB(hobfile->sector_number, IDE_SECTOR_REG); | |
809 | if (task->tf_out_flags.b.lcyl_hob) | |
810 | hwif->OUTB(hobfile->low_cylinder, IDE_LCYL_REG); | |
811 | if (task->tf_out_flags.b.hcyl_hob) | |
812 | hwif->OUTB(hobfile->high_cylinder, IDE_HCYL_REG); | |
813 | ||
814 | /* (ks) Send now the standard registers */ | |
815 | if (task->tf_out_flags.b.error_feature) | |
816 | hwif->OUTB(taskfile->feature, IDE_FEATURE_REG); | |
817 | /* refers to number of sectors to transfer */ | |
818 | if (task->tf_out_flags.b.nsector) | |
819 | hwif->OUTB(taskfile->sector_count, IDE_NSECTOR_REG); | |
820 | /* refers to sector offset or start sector */ | |
821 | if (task->tf_out_flags.b.sector) | |
822 | hwif->OUTB(taskfile->sector_number, IDE_SECTOR_REG); | |
823 | if (task->tf_out_flags.b.lcyl) | |
824 | hwif->OUTB(taskfile->low_cylinder, IDE_LCYL_REG); | |
825 | if (task->tf_out_flags.b.hcyl) | |
826 | hwif->OUTB(taskfile->high_cylinder, IDE_HCYL_REG); | |
827 | ||
828 | /* | |
829 | * (ks) In the flagged taskfile approch, we will use all specified | |
830 | * registers and the register value will not be changed, except the | |
831 | * select bit (master/slave) in the drive_head register. We must make | |
832 | * sure that the desired drive is selected. | |
833 | */ | |
834 | hwif->OUTB(taskfile->device_head | drive->select.all, IDE_SELECT_REG); | |
835 | switch(task->data_phase) { | |
836 | ||
837 | case TASKFILE_OUT_DMAQ: | |
838 | case TASKFILE_OUT_DMA: | |
839 | case TASKFILE_IN_DMAQ: | |
840 | case TASKFILE_IN_DMA: | |
eda5b359 BZ |
841 | if (!drive->using_dma) |
842 | break; | |
843 | ||
dd35b7bb BZ |
844 | if (!hwif->dma_setup(drive)) { |
845 | hwif->dma_exec_cmd(drive, taskfile->command); | |
846 | hwif->dma_start(drive); | |
847 | return ide_started; | |
848 | } | |
1da177e4 LT |
849 | break; |
850 | ||
851 | default: | |
852 | if (task->handler == NULL) | |
853 | return ide_stopped; | |
854 | ||
855 | /* Issue the command */ | |
856 | if (task->prehandler) { | |
857 | hwif->OUTBSYNC(drive, taskfile->command, IDE_COMMAND_REG); | |
858 | ndelay(400); /* FIXME */ | |
859 | return task->prehandler(drive, task->rq); | |
860 | } | |
861 | ide_execute_command(drive, taskfile->command, task->handler, WAIT_WORSTCASE, NULL); | |
dd35b7bb | 862 | return ide_started; |
1da177e4 LT |
863 | } |
864 | ||
dd35b7bb | 865 | return ide_stopped; |
1da177e4 | 866 | } |