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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Bartlomiej Zolnierkiewicz59bca8c2008-02-01 23:09:33 +01002 * 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
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 * IBM Storage Technology Division
Bartlomiej Zolnierkiewicz59bca8c2008-02-01 23:09:33 +01006 * Copyright (C) 2003-2004, 2007 Bartlomiej Zolnierkiewicz
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 *
8 * The big the bad and the ugly.
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 */
10
Linus Torvalds1da177e2005-04-16 15:20:36 -070011#include <linux/module.h>
12#include <linux/types.h>
13#include <linux/string.h>
14#include <linux/kernel.h>
15#include <linux/timer.h>
16#include <linux/mm.h>
Andrew Morton651c29a2006-02-15 15:17:37 -080017#include <linux/sched.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include <linux/interrupt.h>
19#include <linux/major.h>
20#include <linux/errno.h>
21#include <linux/genhd.h>
22#include <linux/blkpg.h>
23#include <linux/slab.h>
24#include <linux/pci.h>
25#include <linux/delay.h>
26#include <linux/hdreg.h>
27#include <linux/ide.h>
28#include <linux/bitops.h>
Jens Axboe55c16a72007-07-25 08:13:56 +020029#include <linux/scatterlist.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070030
31#include <asm/byteorder.h>
32#include <asm/irq.h>
33#include <asm/uaccess.h>
34#include <asm/io.h>
35
Bartlomiej Zolnierkiewicz9e422372008-01-25 22:17:07 +010036void ide_tf_load(ide_drive_t *drive, ide_task_t *task)
37{
38 ide_hwif_t *hwif = drive->hwif;
39 struct ide_taskfile *tf = &task->tf;
40 u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
41
Bartlomiej Zolnierkiewicz74095a92008-01-25 22:17:07 +010042 if (task->tf_flags & IDE_TFLAG_FLAGGED)
43 HIHI = 0xFF;
44
Bartlomiej Zolnierkiewicz807e35d2008-01-25 22:17:10 +010045#ifdef DEBUG
46 printk("%s: tf: feat 0x%02x nsect 0x%02x lbal 0x%02x "
47 "lbam 0x%02x lbah 0x%02x dev 0x%02x cmd 0x%02x\n",
48 drive->name, tf->feature, tf->nsect, tf->lbal,
49 tf->lbam, tf->lbah, tf->device, tf->command);
Bartlomiej Zolnierkiewicz6dd9b832008-01-26 20:13:03 +010050 printk("%s: hob: nsect 0x%02x lbal 0x%02x "
51 "lbam 0x%02x lbah 0x%02x\n",
52 drive->name, tf->hob_nsect, tf->hob_lbal,
53 tf->hob_lbam, tf->hob_lbah);
Bartlomiej Zolnierkiewicz807e35d2008-01-25 22:17:10 +010054#endif
55
Bartlomiej Zolnierkiewicz81ca6912008-01-26 20:13:08 +010056 ide_set_irq(drive, 1);
Bartlomiej Zolnierkiewicz9e422372008-01-25 22:17:07 +010057
58 if ((task->tf_flags & IDE_TFLAG_NO_SELECT_MASK) == 0)
59 SELECT_MASK(drive, 0);
60
Bartlomiej Zolnierkiewicz74095a92008-01-25 22:17:07 +010061 if (task->tf_flags & IDE_TFLAG_OUT_DATA)
62 hwif->OUTW((tf->hob_data << 8) | tf->data, IDE_DATA_REG);
Bartlomiej Zolnierkiewicz9e422372008-01-25 22:17:07 +010063
Bartlomiej Zolnierkiewicz74095a92008-01-25 22:17:07 +010064 if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
65 hwif->OUTB(tf->hob_feature, IDE_FEATURE_REG);
66 if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
67 hwif->OUTB(tf->hob_nsect, IDE_NSECTOR_REG);
68 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
69 hwif->OUTB(tf->hob_lbal, IDE_SECTOR_REG);
70 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
71 hwif->OUTB(tf->hob_lbam, IDE_LCYL_REG);
72 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
73 hwif->OUTB(tf->hob_lbah, IDE_HCYL_REG);
74
75 if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
76 hwif->OUTB(tf->feature, IDE_FEATURE_REG);
77 if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
78 hwif->OUTB(tf->nsect, IDE_NSECTOR_REG);
79 if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
80 hwif->OUTB(tf->lbal, IDE_SECTOR_REG);
81 if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
82 hwif->OUTB(tf->lbam, IDE_LCYL_REG);
83 if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
84 hwif->OUTB(tf->lbah, IDE_HCYL_REG);
Bartlomiej Zolnierkiewicz9e422372008-01-25 22:17:07 +010085
Bartlomiej Zolnierkiewicz807e35d2008-01-25 22:17:10 +010086 if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
87 hwif->OUTB((tf->device & HIHI) | drive->select.all, IDE_SELECT_REG);
Bartlomiej Zolnierkiewicz9e422372008-01-25 22:17:07 +010088}
89
Linus Torvalds1da177e2005-04-16 15:20:36 -070090int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
91{
92 ide_task_t args;
Bartlomiej Zolnierkiewicz650d8412008-01-25 22:17:06 +010093
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 memset(&args, 0, sizeof(ide_task_t));
Bartlomiej Zolnierkiewicz650d8412008-01-25 22:17:06 +010095 args.tf.nsect = 0x01;
Linus Torvalds1da177e2005-04-16 15:20:36 -070096 if (drive->media == ide_disk)
Bartlomiej Zolnierkiewicz650d8412008-01-25 22:17:06 +010097 args.tf.command = WIN_IDENTIFY;
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 else
Bartlomiej Zolnierkiewicz650d8412008-01-25 22:17:06 +010099 args.tf.command = WIN_PIDENTIFY;
Bartlomiej Zolnierkiewicz657cc1a2008-01-26 20:13:10 +0100100 args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
Bartlomiej Zolnierkiewiczac026ff2008-01-25 22:17:14 +0100101 args.data_phase = TASKFILE_IN;
Bartlomiej Zolnierkiewiczac026ff2008-01-25 22:17:14 +0100102 return ide_raw_taskfile(drive, &args, buf, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103}
104
Bartlomiej Zolnierkiewicz74095a92008-01-25 22:17:07 +0100105static int inline task_dma_ok(ide_task_t *task)
106{
Bartlomiej Zolnierkiewiczf6e29e32008-01-25 22:17:16 +0100107 if (blk_fs_request(task->rq) || (task->tf_flags & IDE_TFLAG_FLAGGED))
Bartlomiej Zolnierkiewicz74095a92008-01-25 22:17:07 +0100108 return 1;
109
110 switch (task->tf.command) {
111 case WIN_WRITEDMA_ONCE:
112 case WIN_WRITEDMA:
113 case WIN_WRITEDMA_EXT:
114 case WIN_READDMA_ONCE:
115 case WIN_READDMA:
116 case WIN_READDMA_EXT:
117 case WIN_IDENTIFY_DMA:
118 return 1;
119 }
120
121 return 0;
122}
123
Bartlomiej Zolnierkiewicz1192e522008-01-25 22:17:16 +0100124static ide_startstop_t task_no_data_intr(ide_drive_t *);
Bartlomiej Zolnierkiewicz57d73662008-01-25 22:17:16 +0100125static ide_startstop_t set_geometry_intr(ide_drive_t *);
126static ide_startstop_t recal_intr(ide_drive_t *);
127static ide_startstop_t set_multmode_intr(ide_drive_t *);
Bartlomiej Zolnierkiewiczf6e29e32008-01-25 22:17:16 +0100128static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
129static ide_startstop_t task_in_intr(ide_drive_t *);
Bartlomiej Zolnierkiewicz1192e522008-01-25 22:17:16 +0100130
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
132{
133 ide_hwif_t *hwif = HWIF(drive);
Bartlomiej Zolnierkiewicz650d8412008-01-25 22:17:06 +0100134 struct ide_taskfile *tf = &task->tf;
Bartlomiej Zolnierkiewicz57d73662008-01-25 22:17:16 +0100135 ide_handler_t *handler = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136
Bartlomiej Zolnierkiewicz1edee602008-01-25 22:17:15 +0100137 if (task->data_phase == TASKFILE_MULTI_IN ||
138 task->data_phase == TASKFILE_MULTI_OUT) {
139 if (!drive->mult_count) {
140 printk(KERN_ERR "%s: multimode not set!\n",
141 drive->name);
142 return ide_stopped;
143 }
144 }
145
146 if (task->tf_flags & IDE_TFLAG_FLAGGED)
147 task->tf_flags |= IDE_TFLAG_FLAGGED_SET_IN_FLAGS;
148
Bartlomiej Zolnierkiewiczf6e29e32008-01-25 22:17:16 +0100149 if ((task->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0)
150 ide_tf_load(drive, task);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151
Bartlomiej Zolnierkiewicz10d90152008-01-25 22:17:16 +0100152 switch (task->data_phase) {
153 case TASKFILE_MULTI_OUT:
154 case TASKFILE_OUT:
155 hwif->OUTBSYNC(drive, tf->command, IDE_COMMAND_REG);
156 ndelay(400); /* FIXME */
157 return pre_task_out_intr(drive, task->rq);
158 case TASKFILE_MULTI_IN:
159 case TASKFILE_IN:
Bartlomiej Zolnierkiewicz57d73662008-01-25 22:17:16 +0100160 handler = task_in_intr;
Bartlomiej Zolnierkiewicz1192e522008-01-25 22:17:16 +0100161 /* fall-through */
Bartlomiej Zolnierkiewicz10d90152008-01-25 22:17:16 +0100162 case TASKFILE_NO_DATA:
Bartlomiej Zolnierkiewicz57d73662008-01-25 22:17:16 +0100163 if (handler == NULL)
164 handler = task_no_data_intr;
Bartlomiej Zolnierkiewicz1192e522008-01-25 22:17:16 +0100165 /* WIN_{SPECIFY,RESTORE,SETMULT} use custom handlers */
Bartlomiej Zolnierkiewicz57d73662008-01-25 22:17:16 +0100166 if (task->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) {
167 switch (tf->command) {
168 case WIN_SPECIFY: handler = set_geometry_intr; break;
169 case WIN_RESTORE: handler = recal_intr; break;
170 case WIN_SETMULT: handler = set_multmode_intr; break;
171 }
172 }
173 ide_execute_command(drive, tf->command, handler,
174 WAIT_WORSTCASE, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175 return ide_started;
Bartlomiej Zolnierkiewicz10d90152008-01-25 22:17:16 +0100176 default:
177 if (task_dma_ok(task) == 0 || drive->using_dma == 0 ||
178 hwif->dma_setup(drive))
179 return ide_stopped;
Bartlomiej Zolnierkiewicz74095a92008-01-25 22:17:07 +0100180 hwif->dma_exec_cmd(drive, tf->command);
181 hwif->dma_start(drive);
182 return ide_started;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184}
Bartlomiej Zolnierkiewiczf6e29e32008-01-25 22:17:16 +0100185EXPORT_SYMBOL_GPL(do_rw_taskfile);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187/*
188 * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
189 */
Bartlomiej Zolnierkiewicz57d73662008-01-25 22:17:16 +0100190static ide_startstop_t set_multmode_intr(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191{
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 drive->mult_count = drive->mult_req;
197 } else {
198 drive->mult_req = drive->mult_count = 0;
199 drive->special.b.recalibrate = 1;
200 (void) ide_dump_status(drive, "set_multmode", stat);
201 }
202 return ide_stopped;
203}
204
205/*
206 * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
207 */
Bartlomiej Zolnierkiewicz57d73662008-01-25 22:17:16 +0100208static ide_startstop_t set_geometry_intr(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209{
210 ide_hwif_t *hwif = HWIF(drive);
211 int retries = 5;
212 u8 stat;
213
214 while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
215 udelay(10);
216
217 if (OK_STAT(stat, READY_STAT, BAD_STAT))
218 return ide_stopped;
219
220 if (stat & (ERR_STAT|DRQ_STAT))
221 return ide_error(drive, "set_geometry_intr", stat);
222
Eric Sesterhenn125e1872006-06-23 02:06:06 -0700223 BUG_ON(HWGROUP(drive)->handler != NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224 ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
225 return ide_started;
226}
227
228/*
229 * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
230 */
Bartlomiej Zolnierkiewicz57d73662008-01-25 22:17:16 +0100231static ide_startstop_t recal_intr(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232{
233 ide_hwif_t *hwif = HWIF(drive);
234 u8 stat;
235
236 if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT))
237 return ide_error(drive, "recal_intr", stat);
238 return ide_stopped;
239}
240
241/*
242 * Handler for commands without a data phase
243 */
Bartlomiej Zolnierkiewicz1192e522008-01-25 22:17:16 +0100244static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245{
246 ide_task_t *args = HWGROUP(drive)->rq->special;
247 ide_hwif_t *hwif = HWIF(drive);
248 u8 stat;
249
Ingo Molnar366c7f52006-07-03 00:25:25 -0700250 local_irq_enable_in_hardirq();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
252 return ide_error(drive, "task_no_data_intr", stat);
253 /* calls ide_end_drive_cmd */
254 }
255 if (args)
256 ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG));
257
258 return ide_stopped;
259}
260
Adrian Bunkda6f4c72008-02-01 23:09:16 +0100261static u8 wait_drive_not_busy(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262{
263 ide_hwif_t *hwif = HWIF(drive);
Masatake YAMATOb42fa132007-07-03 22:28:34 +0200264 int retries;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 u8 stat;
266
267 /*
268 * Last sector was transfered, wait until drive is ready.
Bartlomiej Zolnierkiewicz26245652008-01-26 20:13:11 +0100269 * This can take up to 10 usec, but we will wait max 1 ms.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 */
Masatake YAMATOb42fa132007-07-03 22:28:34 +0200271 for (retries = 0; retries < 100; retries++) {
272 if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT)
273 udelay(10);
274 else
275 break;
276 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277
Masatake YAMATOb42fa132007-07-03 22:28:34 +0200278 if (stat & BUSY_STAT)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
280
281 return stat;
282}
283
284static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
285{
286 ide_hwif_t *hwif = drive->hwif;
287 struct scatterlist *sg = hwif->sg_table;
Jens Axboe55c16a72007-07-25 08:13:56 +0200288 struct scatterlist *cursg = hwif->cursg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 struct page *page;
290#ifdef CONFIG_HIGHMEM
291 unsigned long flags;
292#endif
293 unsigned int offset;
294 u8 *buf;
295
Jens Axboe55c16a72007-07-25 08:13:56 +0200296 cursg = hwif->cursg;
297 if (!cursg) {
298 cursg = sg;
299 hwif->cursg = sg;
300 }
301
Jens Axboe45711f12007-10-22 21:19:53 +0200302 page = sg_page(cursg);
Jens Axboe55c16a72007-07-25 08:13:56 +0200303 offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304
305 /* get the current page and offset */
306 page = nth_page(page, (offset >> PAGE_SHIFT));
307 offset %= PAGE_SIZE;
308
309#ifdef CONFIG_HIGHMEM
310 local_irq_save(flags);
311#endif
312 buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
313
314 hwif->nleft--;
315 hwif->cursg_ofs++;
316
Jens Axboe55c16a72007-07-25 08:13:56 +0200317 if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
318 hwif->cursg = sg_next(hwif->cursg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 hwif->cursg_ofs = 0;
320 }
321
322 /* do the actual data transfer */
323 if (write)
Bartlomiej Zolnierkiewicz9e47be02008-01-26 20:13:09 +0100324 hwif->ata_output_data(drive, buf, SECTOR_WORDS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 else
Bartlomiej Zolnierkiewicz9e47be02008-01-26 20:13:09 +0100326 hwif->ata_input_data(drive, buf, SECTOR_WORDS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327
328 kunmap_atomic(buf, KM_BIO_SRC_IRQ);
329#ifdef CONFIG_HIGHMEM
330 local_irq_restore(flags);
331#endif
332}
333
334static void ide_pio_multi(ide_drive_t *drive, unsigned int write)
335{
336 unsigned int nsect;
337
338 nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
339 while (nsect--)
340 ide_pio_sector(drive, write);
341}
342
Arjan van de Ven858119e2006-01-14 13:20:43 -0800343static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344 unsigned int write)
345{
Tejun Heo35cf2b92008-01-26 20:13:10 +0100346 u8 saved_io_32bit = drive->io_32bit;
347
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 if (rq->bio) /* fs request */
349 rq->errors = 0;
350
Tejun Heo35cf2b92008-01-26 20:13:10 +0100351 if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
352 ide_task_t *task = rq->special;
353
354 if (task->tf_flags & IDE_TFLAG_IO_16BIT)
355 drive->io_32bit = 0;
356 }
357
Andrew Morton651c29a2006-02-15 15:17:37 -0800358 touch_softlockup_watchdog();
359
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 switch (drive->hwif->data_phase) {
361 case TASKFILE_MULTI_IN:
362 case TASKFILE_MULTI_OUT:
363 ide_pio_multi(drive, write);
364 break;
365 default:
366 ide_pio_sector(drive, write);
367 break;
368 }
Tejun Heo35cf2b92008-01-26 20:13:10 +0100369
370 drive->io_32bit = saved_io_32bit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371}
372
373static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
374 const char *s, u8 stat)
375{
376 if (rq->bio) {
377 ide_hwif_t *hwif = drive->hwif;
378 int sectors = hwif->nsect - hwif->nleft;
379
380 switch (hwif->data_phase) {
381 case TASKFILE_IN:
382 if (hwif->nleft)
383 break;
384 /* fall through */
385 case TASKFILE_OUT:
386 sectors--;
387 break;
388 case TASKFILE_MULTI_IN:
389 if (hwif->nleft)
390 break;
391 /* fall through */
392 case TASKFILE_MULTI_OUT:
393 sectors -= drive->mult_count;
394 default:
395 break;
396 }
397
398 if (sectors > 0) {
399 ide_driver_t *drv;
400
401 drv = *(ide_driver_t **)rq->rq_disk->private_data;
402 drv->end_request(drive, 1, sectors);
403 }
404 }
405 return ide_error(drive, s, stat);
406}
407
Tejun Heo4d7a9842008-01-26 20:13:11 +0100408void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409{
Jens Axboe4aff5e22006-08-10 08:44:47 +0200410 if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
Tejun Heo4d7a9842008-01-26 20:13:11 +0100411 u8 err = drive->hwif->INB(IDE_ERROR_REG);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412
Tejun Heo4d7a9842008-01-26 20:13:11 +0100413 ide_end_drive_cmd(drive, stat, err);
414 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 }
416
Richard Purdie03731fb2006-03-31 02:31:15 -0800417 if (rq->rq_disk) {
418 ide_driver_t *drv;
419
420 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
Bartlomiej Zolnierkiewicz79f21b82008-01-26 20:13:11 +0100421 drv->end_request(drive, 1, rq->nr_sectors);
Richard Purdie03731fb2006-03-31 02:31:15 -0800422 } else
Bartlomiej Zolnierkiewicz79f21b82008-01-26 20:13:11 +0100423 ide_end_request(drive, 1, rq->nr_sectors);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424}
425
426/*
427 * Handler for command with PIO data-in phase (Read/Read Multiple).
428 */
Bartlomiej Zolnierkiewiczf6e29e32008-01-25 22:17:16 +0100429static ide_startstop_t task_in_intr(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430{
431 ide_hwif_t *hwif = drive->hwif;
432 struct request *rq = HWGROUP(drive)->rq;
433 u8 stat = hwif->INB(IDE_STATUS_REG);
434
435 /* new way for dealing with premature shared PCI interrupts */
Bartlomiej Zolnierkiewicz4906f3b2008-01-26 20:13:11 +0100436 if (!OK_STAT(stat, DRQ_STAT, BAD_R_STAT)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437 if (stat & (ERR_STAT | DRQ_STAT))
438 return task_error(drive, rq, __FUNCTION__, stat);
439 /* No data yet, so wait for another IRQ. */
440 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
441 return ide_started;
442 }
443
444 ide_pio_datablock(drive, rq, 0);
445
446 /* If it was the last datablock check status and finish transfer. */
447 if (!hwif->nleft) {
448 stat = wait_drive_not_busy(drive);
Bartlomiej Zolnierkiewicz73d7de02008-01-26 20:13:10 +0100449 if (!OK_STAT(stat, 0, BAD_STAT))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450 return task_error(drive, rq, __FUNCTION__, stat);
451 task_end_request(drive, rq, stat);
452 return ide_stopped;
453 }
454
455 /* Still data left to transfer. */
456 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
457
458 return ide_started;
459}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460
461/*
462 * Handler for command with PIO data-out phase (Write/Write Multiple).
463 */
464static ide_startstop_t task_out_intr (ide_drive_t *drive)
465{
466 ide_hwif_t *hwif = drive->hwif;
467 struct request *rq = HWGROUP(drive)->rq;
468 u8 stat = hwif->INB(IDE_STATUS_REG);
469
470 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
471 return task_error(drive, rq, __FUNCTION__, stat);
472
473 /* Deal with unexpected ATA data phase. */
474 if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
475 return task_error(drive, rq, __FUNCTION__, stat);
476
477 if (!hwif->nleft) {
478 task_end_request(drive, rq, stat);
479 return ide_stopped;
480 }
481
482 /* Still data left to transfer. */
483 ide_pio_datablock(drive, rq, 1);
484 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
485
486 return ide_started;
487}
488
Bartlomiej Zolnierkiewiczf6e29e32008-01-25 22:17:16 +0100489static ide_startstop_t pre_task_out_intr(ide_drive_t *drive, struct request *rq)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490{
491 ide_startstop_t startstop;
492
Bartlomiej Zolnierkiewicz4906f3b2008-01-26 20:13:11 +0100493 if (ide_wait_stat(&startstop, drive, DRQ_STAT,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 drive->bad_wstat, WAIT_DRQ)) {
495 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
496 drive->name,
497 drive->hwif->data_phase ? "MULT" : "",
498 drive->addressing ? "_EXT" : "");
499 return startstop;
500 }
501
502 if (!drive->unmask)
503 local_irq_disable();
504
505 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
506 ide_pio_datablock(drive, rq, 1);
507
508 return ide_started;
509}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510
Bartlomiej Zolnierkiewiczac026ff2008-01-25 22:17:14 +0100511int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512{
513 struct request rq;
514
515 memset(&rq, 0, sizeof(rq));
Bartlomiej Zolnierkiewicz02ac2462007-11-05 21:42:27 +0100516 rq.ref_count = 1;
Jens Axboe4aff5e22006-08-10 08:44:47 +0200517 rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 rq.buffer = buf;
519
520 /*
521 * (ks) We transfer currently only whole sectors.
522 * This is suffient for now. But, it would be great,
523 * if we would find a solution to transfer any size.
524 * To support special commands like READ LONG.
525 */
Bartlomiej Zolnierkiewiczac026ff2008-01-25 22:17:14 +0100526 rq.hard_nr_sectors = rq.nr_sectors = nsect;
527 rq.hard_cur_sectors = rq.current_nr_sectors = nsect;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528
Bartlomiej Zolnierkiewiczac026ff2008-01-25 22:17:14 +0100529 if (task->tf_flags & IDE_TFLAG_WRITE)
530 rq.cmd_flags |= REQ_RW;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531
Bartlomiej Zolnierkiewiczac026ff2008-01-25 22:17:14 +0100532 rq.special = task;
533 task->rq = &rq;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535 return ide_do_drive_cmd(drive, &rq, ide_wait);
536}
537
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538EXPORT_SYMBOL(ide_raw_taskfile);
539
Bartlomiej Zolnierkiewicz9a3c49b2008-01-25 22:17:07 +0100540int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
541{
Bartlomiej Zolnierkiewiczac026ff2008-01-25 22:17:14 +0100542 task->data_phase = TASKFILE_NO_DATA;
Bartlomiej Zolnierkiewicz9a3c49b2008-01-25 22:17:07 +0100543
Bartlomiej Zolnierkiewiczac026ff2008-01-25 22:17:14 +0100544 return ide_raw_taskfile(drive, task, NULL, 0);
Bartlomiej Zolnierkiewicz9a3c49b2008-01-25 22:17:07 +0100545}
546EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
547
Bartlomiej Zolnierkiewicz26a5b042007-11-05 21:42:27 +0100548#ifdef CONFIG_IDE_TASK_IOCTL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
550{
551 ide_task_request_t *req_task;
552 ide_task_t args;
553 u8 *outbuf = NULL;
554 u8 *inbuf = NULL;
Bartlomiej Zolnierkiewiczac026ff2008-01-25 22:17:14 +0100555 u8 *data_buf = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556 int err = 0;
557 int tasksize = sizeof(struct ide_task_request_s);
Alan Cox3a42bb22006-10-16 16:31:02 +0100558 unsigned int taskin = 0;
559 unsigned int taskout = 0;
Bartlomiej Zolnierkiewiczac026ff2008-01-25 22:17:14 +0100560 u16 nsect = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561 char __user *buf = (char __user *)arg;
562
563// printk("IDE Taskfile ...\n");
564
Deepak Saxenaf5e3c2f2005-11-07 01:01:25 -0800565 req_task = kzalloc(tasksize, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566 if (req_task == NULL) return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567 if (copy_from_user(req_task, buf, tasksize)) {
568 kfree(req_task);
569 return -EFAULT;
570 }
571
Alan Cox3a42bb22006-10-16 16:31:02 +0100572 taskout = req_task->out_size;
573 taskin = req_task->in_size;
574
575 if (taskin > 65536 || taskout > 65536) {
576 err = -EINVAL;
577 goto abort;
578 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579
580 if (taskout) {
581 int outtotal = tasksize;
Deepak Saxenaf5e3c2f2005-11-07 01:01:25 -0800582 outbuf = kzalloc(taskout, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583 if (outbuf == NULL) {
584 err = -ENOMEM;
585 goto abort;
586 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
588 err = -EFAULT;
589 goto abort;
590 }
591 }
592
593 if (taskin) {
594 int intotal = tasksize + taskout;
Deepak Saxenaf5e3c2f2005-11-07 01:01:25 -0800595 inbuf = kzalloc(taskin, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 if (inbuf == NULL) {
597 err = -ENOMEM;
598 goto abort;
599 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600 if (copy_from_user(inbuf, buf + intotal, taskin)) {
601 err = -EFAULT;
602 goto abort;
603 }
604 }
605
606 memset(&args, 0, sizeof(ide_task_t));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607
Bartlomiej Zolnierkiewicz650d8412008-01-25 22:17:06 +0100608 memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
609 memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
Bartlomiej Zolnierkiewicz866e2ec2008-01-25 22:17:14 +0100610
611 args.data_phase = req_task->data_phase;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612
Bartlomiej Zolnierkiewicz657cc1a2008-01-26 20:13:10 +0100613 args.tf_flags = IDE_TFLAG_IO_16BIT | IDE_TFLAG_DEVICE |
614 IDE_TFLAG_IN_TF;
Bartlomiej Zolnierkiewicza3bbb9d2008-01-25 22:17:10 +0100615 if (drive->addressing == 1)
Bartlomiej Zolnierkiewicz657cc1a2008-01-26 20:13:10 +0100616 args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_IN_HOB);
Bartlomiej Zolnierkiewicza3bbb9d2008-01-25 22:17:10 +0100617
Bartlomiej Zolnierkiewicz74095a92008-01-25 22:17:07 +0100618 if (req_task->out_flags.all) {
619 args.tf_flags |= IDE_TFLAG_FLAGGED;
620
621 if (req_task->out_flags.b.data)
622 args.tf_flags |= IDE_TFLAG_OUT_DATA;
623
624 if (req_task->out_flags.b.nsector_hob)
625 args.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
626 if (req_task->out_flags.b.sector_hob)
627 args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
628 if (req_task->out_flags.b.lcyl_hob)
629 args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
630 if (req_task->out_flags.b.hcyl_hob)
631 args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
632
633 if (req_task->out_flags.b.error_feature)
634 args.tf_flags |= IDE_TFLAG_OUT_FEATURE;
635 if (req_task->out_flags.b.nsector)
636 args.tf_flags |= IDE_TFLAG_OUT_NSECT;
637 if (req_task->out_flags.b.sector)
638 args.tf_flags |= IDE_TFLAG_OUT_LBAL;
639 if (req_task->out_flags.b.lcyl)
640 args.tf_flags |= IDE_TFLAG_OUT_LBAM;
641 if (req_task->out_flags.b.hcyl)
642 args.tf_flags |= IDE_TFLAG_OUT_LBAH;
Bartlomiej Zolnierkiewicza3bbb9d2008-01-25 22:17:10 +0100643 } else {
644 args.tf_flags |= IDE_TFLAG_OUT_TF;
645 if (args.tf_flags & IDE_TFLAG_LBA48)
646 args.tf_flags |= IDE_TFLAG_OUT_HOB;
Bartlomiej Zolnierkiewicz74095a92008-01-25 22:17:07 +0100647 }
648
Bartlomiej Zolnierkiewicz866e2ec2008-01-25 22:17:14 +0100649 if (req_task->in_flags.b.data)
650 args.tf_flags |= IDE_TFLAG_IN_DATA;
651
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652 switch(req_task->data_phase) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653 case TASKFILE_MULTI_OUT:
654 if (!drive->mult_count) {
655 /* (hs): give up if multcount is not set */
656 printk(KERN_ERR "%s: %s Multimode Write " \
657 "multcount is not set\n",
658 drive->name, __FUNCTION__);
659 err = -EPERM;
660 goto abort;
661 }
662 /* fall through */
663 case TASKFILE_OUT:
Bartlomiej Zolnierkiewiczac026ff2008-01-25 22:17:14 +0100664 /* fall through */
665 case TASKFILE_OUT_DMAQ:
666 case TASKFILE_OUT_DMA:
667 nsect = taskout / SECTOR_SIZE;
668 data_buf = outbuf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669 break;
670 case TASKFILE_MULTI_IN:
671 if (!drive->mult_count) {
672 /* (hs): give up if multcount is not set */
673 printk(KERN_ERR "%s: %s Multimode Read failure " \
674 "multcount is not set\n",
675 drive->name, __FUNCTION__);
676 err = -EPERM;
677 goto abort;
678 }
679 /* fall through */
680 case TASKFILE_IN:
Bartlomiej Zolnierkiewiczac026ff2008-01-25 22:17:14 +0100681 /* fall through */
682 case TASKFILE_IN_DMAQ:
683 case TASKFILE_IN_DMA:
684 nsect = taskin / SECTOR_SIZE;
685 data_buf = inbuf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686 break;
687 case TASKFILE_NO_DATA:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688 break;
689 default:
690 err = -EFAULT;
691 goto abort;
692 }
693
Bartlomiej Zolnierkiewiczac026ff2008-01-25 22:17:14 +0100694 if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
695 nsect = 0;
696 else if (!nsect) {
697 nsect = (args.tf.hob_nsect << 8) | args.tf.nsect;
698
699 if (!nsect) {
700 printk(KERN_ERR "%s: in/out command without data\n",
701 drive->name);
702 err = -EFAULT;
703 goto abort;
704 }
705 }
706
707 if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE)
708 args.tf_flags |= IDE_TFLAG_WRITE;
709
710 err = ide_raw_taskfile(drive, &args, data_buf, nsect);
711
Bartlomiej Zolnierkiewicz650d8412008-01-25 22:17:06 +0100712 memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
713 memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
Bartlomiej Zolnierkiewicz866e2ec2008-01-25 22:17:14 +0100714
715 if ((args.tf_flags & IDE_TFLAG_FLAGGED_SET_IN_FLAGS) &&
716 req_task->in_flags.all == 0) {
717 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
718 if (drive->addressing == 1)
719 req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
720 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721
722 if (copy_to_user(buf, req_task, tasksize)) {
723 err = -EFAULT;
724 goto abort;
725 }
726 if (taskout) {
727 int outtotal = tasksize;
728 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
729 err = -EFAULT;
730 goto abort;
731 }
732 }
733 if (taskin) {
734 int intotal = tasksize + taskout;
735 if (copy_to_user(buf + intotal, inbuf, taskin)) {
736 err = -EFAULT;
737 goto abort;
738 }
739 }
740abort:
741 kfree(req_task);
Jesper Juhl6044ec82005-11-07 01:01:32 -0800742 kfree(outbuf);
743 kfree(inbuf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744
745// printk("IDE Taskfile ioctl ended. rc = %i\n", err);
746
Linus Torvalds1da177e2005-04-16 15:20:36 -0700747 return err;
748}
Bartlomiej Zolnierkiewicz26a5b042007-11-05 21:42:27 +0100749#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
752{
Bartlomiej Zolnierkiewicz5a9e77a2008-01-26 20:13:13 +0100753 u8 *buf = NULL;
754 int bufsize = 0, err = 0;
755 u8 args[4], xfer_rate = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756 ide_task_t tfargs;
Bartlomiej Zolnierkiewicz650d8412008-01-25 22:17:06 +0100757 struct ide_taskfile *tf = &tfargs.tf;
Bartlomiej Zolnierkiewicz5efe7c52008-02-02 19:56:46 +0100758 struct hd_driveid *id = drive->id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759
760 if (NULL == (void *) arg) {
761 struct request rq;
Bartlomiej Zolnierkiewicz145b75e2008-01-26 20:13:11 +0100762
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763 ide_init_drive_cmd(&rq);
Bartlomiej Zolnierkiewicz852738f2008-01-26 20:13:12 +0100764 rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
Bartlomiej Zolnierkiewicz145b75e2008-01-26 20:13:11 +0100765
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766 return ide_do_drive_cmd(drive, &rq, ide_wait);
767 }
768
769 if (copy_from_user(args, (void __user *)arg, 4))
770 return -EFAULT;
771
772 memset(&tfargs, 0, sizeof(ide_task_t));
Bartlomiej Zolnierkiewicz650d8412008-01-25 22:17:06 +0100773 tf->feature = args[2];
Bartlomiej Zolnierkiewicz5a9e77a2008-01-26 20:13:13 +0100774 if (args[0] == WIN_SMART) {
775 tf->nsect = args[3];
776 tf->lbal = args[1];
777 tf->lbam = 0x4f;
778 tf->lbah = 0xc2;
779 tfargs.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_IN_NSECT;
780 } else {
781 tf->nsect = args[1];
782 tfargs.tf_flags = IDE_TFLAG_OUT_FEATURE |
783 IDE_TFLAG_OUT_NSECT | IDE_TFLAG_IN_NSECT;
784 }
Bartlomiej Zolnierkiewicz650d8412008-01-25 22:17:06 +0100785 tf->command = args[0];
Bartlomiej Zolnierkiewicz5a9e77a2008-01-26 20:13:13 +0100786 tfargs.data_phase = args[3] ? TASKFILE_IN : TASKFILE_NO_DATA;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787
788 if (args[3]) {
Bartlomiej Zolnierkiewicz5a9e77a2008-01-26 20:13:13 +0100789 tfargs.tf_flags |= IDE_TFLAG_IO_16BIT;
790 bufsize = SECTOR_WORDS * 4 * args[3];
791 buf = kzalloc(bufsize, GFP_KERNEL);
792 if (buf == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794 }
Bartlomiej Zolnierkiewicz5a9e77a2008-01-26 20:13:13 +0100795
Bartlomiej Zolnierkiewicz5efe7c52008-02-02 19:56:46 +0100796 if (tf->command == WIN_SETFEATURES &&
797 tf->feature == SETFEATURES_XFER &&
798 tf->nsect >= XFER_SW_DMA_0 &&
799 (id->dma_ultra || id->dma_mword || id->dma_1word)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800 xfer_rate = args[1];
801 if (ide_ata66_check(drive, &tfargs))
802 goto abort;
803 }
804
Bartlomiej Zolnierkiewicz5a9e77a2008-01-26 20:13:13 +0100805 err = ide_raw_taskfile(drive, &tfargs, buf, args[3]);
806
807 args[0] = tf->status;
808 args[1] = tf->error;
809 args[2] = tf->nsect;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810
811 if (!err && xfer_rate) {
812 /* active-retuning-calls future */
813 ide_set_xfer_rate(drive, xfer_rate);
814 ide_driveid_update(drive);
815 }
816abort:
Bartlomiej Zolnierkiewicz5a9e77a2008-01-26 20:13:13 +0100817 if (copy_to_user((void __user *)arg, &args, 4))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818 err = -EFAULT;
Bartlomiej Zolnierkiewicz5a9e77a2008-01-26 20:13:13 +0100819 if (buf) {
820 if (copy_to_user((void __user *)(arg + 4), buf, bufsize))
821 err = -EFAULT;
822 kfree(buf);
823 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824 return err;
825}
826
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
828{
829 void __user *p = (void __user *)arg;
830 int err = 0;
Bartlomiej Zolnierkiewicz14b89ef2008-01-25 22:17:11 +0100831 u8 args[7];
832 ide_task_t task;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833
834 if (copy_from_user(args, p, 7))
835 return -EFAULT;
Bartlomiej Zolnierkiewicz14b89ef2008-01-25 22:17:11 +0100836
837 memset(&task, 0, sizeof(task));
838 memcpy(&task.tf_array[7], &args[1], 6);
839 task.tf.command = args[0];
Bartlomiej Zolnierkiewicz657cc1a2008-01-26 20:13:10 +0100840 task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
Bartlomiej Zolnierkiewicz14b89ef2008-01-25 22:17:11 +0100841
842 err = ide_no_data_taskfile(drive, &task);
843
844 args[0] = task.tf.command;
845 memcpy(&args[1], &task.tf_array[7], 6);
846
847 if (copy_to_user(p, args, 7))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848 err = -EFAULT;
Bartlomiej Zolnierkiewicz14b89ef2008-01-25 22:17:11 +0100849
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850 return err;
851}