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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/types.h>
12#include <linux/string.h>
13#include <linux/kernel.h>
Andrew Morton651c29a2006-02-15 15:17:37 -080014#include <linux/sched.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#include <linux/interrupt.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#include <linux/errno.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include <linux/delay.h>
19#include <linux/hdreg.h>
20#include <linux/ide.h>
Jens Axboe55c16a72007-07-25 08:13:56 +020021#include <linux/scatterlist.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#include <asm/uaccess.h>
24#include <asm/io.h>
25
Bartlomiej Zolnierkiewicz089c5c72008-04-28 23:44:39 +020026void ide_tf_dump(const char *s, struct ide_taskfile *tf)
27{
28#ifdef DEBUG
29 printk("%s: tf: feat 0x%02x nsect 0x%02x lbal 0x%02x "
30 "lbam 0x%02x lbah 0x%02x dev 0x%02x cmd 0x%02x\n",
31 s, tf->feature, tf->nsect, tf->lbal,
32 tf->lbam, tf->lbah, tf->device, tf->command);
33 printk("%s: hob: nsect 0x%02x lbal 0x%02x "
34 "lbam 0x%02x lbah 0x%02x\n",
35 s, tf->hob_nsect, tf->hob_lbal,
36 tf->hob_lbam, tf->hob_lbah);
37#endif
38}
39
Linus Torvalds1da177e2005-04-16 15:20:36 -070040int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
41{
42 ide_task_t args;
Bartlomiej Zolnierkiewicz650d8412008-01-25 22:17:06 +010043
Linus Torvalds1da177e2005-04-16 15:20:36 -070044 memset(&args, 0, sizeof(ide_task_t));
Bartlomiej Zolnierkiewicz650d8412008-01-25 22:17:06 +010045 args.tf.nsect = 0x01;
Linus Torvalds1da177e2005-04-16 15:20:36 -070046 if (drive->media == ide_disk)
Bartlomiej Zolnierkiewicz650d8412008-01-25 22:17:06 +010047 args.tf.command = WIN_IDENTIFY;
Linus Torvalds1da177e2005-04-16 15:20:36 -070048 else
Bartlomiej Zolnierkiewicz650d8412008-01-25 22:17:06 +010049 args.tf.command = WIN_PIDENTIFY;
Bartlomiej Zolnierkiewicz657cc1a2008-01-26 20:13:10 +010050 args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
Bartlomiej Zolnierkiewiczac026ff2008-01-25 22:17:14 +010051 args.data_phase = TASKFILE_IN;
Bartlomiej Zolnierkiewiczac026ff2008-01-25 22:17:14 +010052 return ide_raw_taskfile(drive, &args, buf, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -070053}
54
Bartlomiej Zolnierkiewicz1192e522008-01-25 22:17:16 +010055static ide_startstop_t task_no_data_intr(ide_drive_t *);
Bartlomiej Zolnierkiewicz57d73662008-01-25 22:17:16 +010056static ide_startstop_t set_geometry_intr(ide_drive_t *);
57static ide_startstop_t recal_intr(ide_drive_t *);
58static ide_startstop_t set_multmode_intr(ide_drive_t *);
Bartlomiej Zolnierkiewiczf6e29e32008-01-25 22:17:16 +010059static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
60static ide_startstop_t task_in_intr(ide_drive_t *);
Bartlomiej Zolnierkiewicz1192e522008-01-25 22:17:16 +010061
Linus Torvalds1da177e2005-04-16 15:20:36 -070062ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
63{
64 ide_hwif_t *hwif = HWIF(drive);
Bartlomiej Zolnierkiewicz650d8412008-01-25 22:17:06 +010065 struct ide_taskfile *tf = &task->tf;
Bartlomiej Zolnierkiewicz57d73662008-01-25 22:17:16 +010066 ide_handler_t *handler = NULL;
Bartlomiej Zolnierkiewiczf37afda2008-04-26 22:25:24 +020067 const struct ide_dma_ops *dma_ops = hwif->dma_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
Bartlomiej Zolnierkiewicz1edee602008-01-25 22:17:15 +010069 if (task->data_phase == TASKFILE_MULTI_IN ||
70 task->data_phase == TASKFILE_MULTI_OUT) {
71 if (!drive->mult_count) {
72 printk(KERN_ERR "%s: multimode not set!\n",
73 drive->name);
74 return ide_stopped;
75 }
76 }
77
78 if (task->tf_flags & IDE_TFLAG_FLAGGED)
79 task->tf_flags |= IDE_TFLAG_FLAGGED_SET_IN_FLAGS;
80
Bartlomiej Zolnierkiewicz089c5c72008-04-28 23:44:39 +020081 if ((task->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0) {
82 ide_tf_dump(drive->name, tf);
Bartlomiej Zolnierkiewiczed4af482008-07-15 21:21:48 +020083 ide_set_irq(drive, 1);
84 SELECT_MASK(drive, 0);
Bartlomiej Zolnierkiewicz94cd5b62008-04-28 23:44:40 +020085 hwif->tf_load(drive, task);
Bartlomiej Zolnierkiewicz089c5c72008-04-28 23:44:39 +020086 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070087
Bartlomiej Zolnierkiewicz10d90152008-01-25 22:17:16 +010088 switch (task->data_phase) {
89 case TASKFILE_MULTI_OUT:
90 case TASKFILE_OUT:
Bartlomiej Zolnierkiewiczf8c4bd0a2008-07-15 21:21:49 +020091 hwif->OUTBSYNC(hwif, tf->command, hwif->io_ports.command_addr);
Bartlomiej Zolnierkiewicz10d90152008-01-25 22:17:16 +010092 ndelay(400); /* FIXME */
93 return pre_task_out_intr(drive, task->rq);
94 case TASKFILE_MULTI_IN:
95 case TASKFILE_IN:
Bartlomiej Zolnierkiewicz57d73662008-01-25 22:17:16 +010096 handler = task_in_intr;
Bartlomiej Zolnierkiewicz1192e522008-01-25 22:17:16 +010097 /* fall-through */
Bartlomiej Zolnierkiewicz10d90152008-01-25 22:17:16 +010098 case TASKFILE_NO_DATA:
Bartlomiej Zolnierkiewicz57d73662008-01-25 22:17:16 +010099 if (handler == NULL)
100 handler = task_no_data_intr;
Bartlomiej Zolnierkiewicz1192e522008-01-25 22:17:16 +0100101 /* WIN_{SPECIFY,RESTORE,SETMULT} use custom handlers */
Bartlomiej Zolnierkiewicz57d73662008-01-25 22:17:16 +0100102 if (task->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) {
103 switch (tf->command) {
104 case WIN_SPECIFY: handler = set_geometry_intr; break;
105 case WIN_RESTORE: handler = recal_intr; break;
106 case WIN_SETMULT: handler = set_multmode_intr; break;
107 }
108 }
109 ide_execute_command(drive, tf->command, handler,
110 WAIT_WORSTCASE, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111 return ide_started;
Bartlomiej Zolnierkiewicz10d90152008-01-25 22:17:16 +0100112 default:
Bartlomiej Zolnierkiewicz07fe69d2008-07-16 20:33:43 +0200113 if (drive->using_dma == 0 || dma_ops->dma_setup(drive))
Bartlomiej Zolnierkiewicz10d90152008-01-25 22:17:16 +0100114 return ide_stopped;
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200115 dma_ops->dma_exec_cmd(drive, tf->command);
116 dma_ops->dma_start(drive);
Bartlomiej Zolnierkiewicz74095a92008-01-25 22:17:07 +0100117 return ide_started;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119}
Bartlomiej Zolnierkiewiczf6e29e32008-01-25 22:17:16 +0100120EXPORT_SYMBOL_GPL(do_rw_taskfile);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122/*
123 * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
124 */
Bartlomiej Zolnierkiewicz57d73662008-01-25 22:17:16 +0100125static ide_startstop_t set_multmode_intr(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126{
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100127 u8 stat = ide_read_status(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100129 if (OK_STAT(stat, READY_STAT, BAD_STAT))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 drive->mult_count = drive->mult_req;
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100131 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 drive->mult_req = drive->mult_count = 0;
133 drive->special.b.recalibrate = 1;
134 (void) ide_dump_status(drive, "set_multmode", stat);
135 }
136 return ide_stopped;
137}
138
139/*
140 * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
141 */
Bartlomiej Zolnierkiewicz57d73662008-01-25 22:17:16 +0100142static ide_startstop_t set_geometry_intr(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 int retries = 5;
145 u8 stat;
146
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100147 while (((stat = ide_read_status(drive)) & BUSY_STAT) && retries--)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 udelay(10);
149
150 if (OK_STAT(stat, READY_STAT, BAD_STAT))
151 return ide_stopped;
152
153 if (stat & (ERR_STAT|DRQ_STAT))
154 return ide_error(drive, "set_geometry_intr", stat);
155
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156 ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
157 return ide_started;
158}
159
160/*
161 * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
162 */
Bartlomiej Zolnierkiewicz57d73662008-01-25 22:17:16 +0100163static ide_startstop_t recal_intr(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164{
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100165 u8 stat = ide_read_status(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100167 if (!OK_STAT(stat, READY_STAT, BAD_STAT))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168 return ide_error(drive, "recal_intr", stat);
169 return ide_stopped;
170}
171
172/*
173 * Handler for commands without a data phase
174 */
Bartlomiej Zolnierkiewicz1192e522008-01-25 22:17:16 +0100175static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176{
177 ide_task_t *args = HWGROUP(drive)->rq->special;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 u8 stat;
179
Ingo Molnar366c7f52006-07-03 00:25:25 -0700180 local_irq_enable_in_hardirq();
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100181 stat = ide_read_status(drive);
182
183 if (!OK_STAT(stat, READY_STAT, BAD_STAT))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 return ide_error(drive, "task_no_data_intr", stat);
185 /* calls ide_end_drive_cmd */
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100186
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 if (args)
Bartlomiej Zolnierkiewicz64a57fe2008-02-06 02:57:51 +0100188 ide_end_drive_cmd(drive, stat, ide_read_error(drive));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189
190 return ide_stopped;
191}
192
Adrian Bunkda6f4c72008-02-01 23:09:16 +0100193static u8 wait_drive_not_busy(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194{
Masatake YAMATOb42fa132007-07-03 22:28:34 +0200195 int retries;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196 u8 stat;
197
198 /*
Bartlomiej Zolnierkiewiczf54feaf2008-06-20 20:53:33 +0200199 * Last sector was transfered, wait until device is ready. This can
200 * take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 */
Bartlomiej Zolnierkiewiczf54feaf2008-06-20 20:53:33 +0200202 for (retries = 0; retries < 1000; retries++) {
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100203 stat = ide_read_status(drive);
204
205 if (stat & BUSY_STAT)
Masatake YAMATOb42fa132007-07-03 22:28:34 +0200206 udelay(10);
207 else
208 break;
209 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210
Masatake YAMATOb42fa132007-07-03 22:28:34 +0200211 if (stat & BUSY_STAT)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
213
214 return stat;
215}
216
Bartlomiej Zolnierkiewicz92d3ab22008-04-28 23:44:36 +0200217static void ide_pio_sector(ide_drive_t *drive, struct request *rq,
218 unsigned int write)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219{
220 ide_hwif_t *hwif = drive->hwif;
221 struct scatterlist *sg = hwif->sg_table;
Jens Axboe55c16a72007-07-25 08:13:56 +0200222 struct scatterlist *cursg = hwif->cursg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 struct page *page;
224#ifdef CONFIG_HIGHMEM
225 unsigned long flags;
226#endif
227 unsigned int offset;
228 u8 *buf;
229
Jens Axboe55c16a72007-07-25 08:13:56 +0200230 cursg = hwif->cursg;
231 if (!cursg) {
232 cursg = sg;
233 hwif->cursg = sg;
234 }
235
Jens Axboe45711f12007-10-22 21:19:53 +0200236 page = sg_page(cursg);
Jens Axboe55c16a72007-07-25 08:13:56 +0200237 offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238
239 /* get the current page and offset */
240 page = nth_page(page, (offset >> PAGE_SHIFT));
241 offset %= PAGE_SIZE;
242
243#ifdef CONFIG_HIGHMEM
244 local_irq_save(flags);
245#endif
246 buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
247
248 hwif->nleft--;
249 hwif->cursg_ofs++;
250
Jens Axboe55c16a72007-07-25 08:13:56 +0200251 if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
252 hwif->cursg = sg_next(hwif->cursg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 hwif->cursg_ofs = 0;
254 }
255
256 /* do the actual data transfer */
257 if (write)
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200258 hwif->output_data(drive, rq, buf, SECTOR_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 else
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200260 hwif->input_data(drive, rq, buf, SECTOR_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261
262 kunmap_atomic(buf, KM_BIO_SRC_IRQ);
263#ifdef CONFIG_HIGHMEM
264 local_irq_restore(flags);
265#endif
266}
267
Bartlomiej Zolnierkiewicz92d3ab22008-04-28 23:44:36 +0200268static void ide_pio_multi(ide_drive_t *drive, struct request *rq,
269 unsigned int write)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270{
271 unsigned int nsect;
272
273 nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
274 while (nsect--)
Bartlomiej Zolnierkiewicz92d3ab22008-04-28 23:44:36 +0200275 ide_pio_sector(drive, rq, write);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276}
277
Arjan van de Ven858119e2006-01-14 13:20:43 -0800278static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 unsigned int write)
280{
Tejun Heo35cf2b92008-01-26 20:13:10 +0100281 u8 saved_io_32bit = drive->io_32bit;
282
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283 if (rq->bio) /* fs request */
284 rq->errors = 0;
285
Tejun Heo35cf2b92008-01-26 20:13:10 +0100286 if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
287 ide_task_t *task = rq->special;
288
289 if (task->tf_flags & IDE_TFLAG_IO_16BIT)
290 drive->io_32bit = 0;
291 }
292
Andrew Morton651c29a2006-02-15 15:17:37 -0800293 touch_softlockup_watchdog();
294
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 switch (drive->hwif->data_phase) {
296 case TASKFILE_MULTI_IN:
297 case TASKFILE_MULTI_OUT:
Bartlomiej Zolnierkiewicz92d3ab22008-04-28 23:44:36 +0200298 ide_pio_multi(drive, rq, write);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 break;
300 default:
Bartlomiej Zolnierkiewicz92d3ab22008-04-28 23:44:36 +0200301 ide_pio_sector(drive, rq, write);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302 break;
303 }
Tejun Heo35cf2b92008-01-26 20:13:10 +0100304
305 drive->io_32bit = saved_io_32bit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306}
307
308static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
309 const char *s, u8 stat)
310{
311 if (rq->bio) {
312 ide_hwif_t *hwif = drive->hwif;
313 int sectors = hwif->nsect - hwif->nleft;
314
315 switch (hwif->data_phase) {
316 case TASKFILE_IN:
317 if (hwif->nleft)
318 break;
319 /* fall through */
320 case TASKFILE_OUT:
321 sectors--;
322 break;
323 case TASKFILE_MULTI_IN:
324 if (hwif->nleft)
325 break;
326 /* fall through */
327 case TASKFILE_MULTI_OUT:
328 sectors -= drive->mult_count;
329 default:
330 break;
331 }
332
333 if (sectors > 0) {
334 ide_driver_t *drv;
335
336 drv = *(ide_driver_t **)rq->rq_disk->private_data;
337 drv->end_request(drive, 1, sectors);
338 }
339 }
340 return ide_error(drive, s, stat);
341}
342
Tejun Heo4d7a9842008-01-26 20:13:11 +0100343void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344{
Jens Axboe4aff5e22006-08-10 08:44:47 +0200345 if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
Bartlomiej Zolnierkiewicz64a57fe2008-02-06 02:57:51 +0100346 u8 err = ide_read_error(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347
Tejun Heo4d7a9842008-01-26 20:13:11 +0100348 ide_end_drive_cmd(drive, stat, err);
349 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350 }
351
Richard Purdie03731fb2006-03-31 02:31:15 -0800352 if (rq->rq_disk) {
353 ide_driver_t *drv;
354
355 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
Bartlomiej Zolnierkiewicz79f21b82008-01-26 20:13:11 +0100356 drv->end_request(drive, 1, rq->nr_sectors);
Richard Purdie03731fb2006-03-31 02:31:15 -0800357 } else
Bartlomiej Zolnierkiewicz79f21b82008-01-26 20:13:11 +0100358 ide_end_request(drive, 1, rq->nr_sectors);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359}
360
361/*
Linus Torvalds6c3c3152008-03-18 21:26:24 -0700362 * We got an interrupt on a task_in case, but no errors and no DRQ.
363 *
364 * It might be a spurious irq (shared irq), but it might be a
365 * command that had no output.
366 */
367static ide_startstop_t task_in_unexpected(ide_drive_t *drive, struct request *rq, u8 stat)
368{
369 /* Command all done? */
370 if (OK_STAT(stat, READY_STAT, BUSY_STAT)) {
371 task_end_request(drive, rq, stat);
372 return ide_stopped;
373 }
374
375 /* Assume it was a spurious irq */
376 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
377 return ide_started;
378}
379
380/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 * Handler for command with PIO data-in phase (Read/Read Multiple).
382 */
Bartlomiej Zolnierkiewiczf6e29e32008-01-25 22:17:16 +0100383static ide_startstop_t task_in_intr(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384{
385 ide_hwif_t *hwif = drive->hwif;
386 struct request *rq = HWGROUP(drive)->rq;
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100387 u8 stat = ide_read_status(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388
Linus Torvalds6c3c3152008-03-18 21:26:24 -0700389 /* Error? */
390 if (stat & ERR_STAT)
Harvey Harrisoneb639632008-04-26 22:25:20 +0200391 return task_error(drive, rq, __func__, stat);
Linus Torvalds6c3c3152008-03-18 21:26:24 -0700392
393 /* Didn't want any data? Odd. */
394 if (!(stat & DRQ_STAT))
395 return task_in_unexpected(drive, rq, stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396
397 ide_pio_datablock(drive, rq, 0);
398
Linus Torvalds6c3c3152008-03-18 21:26:24 -0700399 /* Are we done? Check status and finish transfer. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 if (!hwif->nleft) {
401 stat = wait_drive_not_busy(drive);
Bartlomiej Zolnierkiewicz73d7de02008-01-26 20:13:10 +0100402 if (!OK_STAT(stat, 0, BAD_STAT))
Harvey Harrisoneb639632008-04-26 22:25:20 +0200403 return task_error(drive, rq, __func__, stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404 task_end_request(drive, rq, stat);
405 return ide_stopped;
406 }
407
408 /* Still data left to transfer. */
409 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
410
411 return ide_started;
412}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413
414/*
415 * Handler for command with PIO data-out phase (Write/Write Multiple).
416 */
417static ide_startstop_t task_out_intr (ide_drive_t *drive)
418{
419 ide_hwif_t *hwif = drive->hwif;
420 struct request *rq = HWGROUP(drive)->rq;
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100421 u8 stat = ide_read_status(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422
423 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
Harvey Harrisoneb639632008-04-26 22:25:20 +0200424 return task_error(drive, rq, __func__, stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425
426 /* Deal with unexpected ATA data phase. */
427 if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
Harvey Harrisoneb639632008-04-26 22:25:20 +0200428 return task_error(drive, rq, __func__, stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429
430 if (!hwif->nleft) {
431 task_end_request(drive, rq, stat);
432 return ide_stopped;
433 }
434
435 /* Still data left to transfer. */
436 ide_pio_datablock(drive, rq, 1);
437 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
438
439 return ide_started;
440}
441
Bartlomiej Zolnierkiewiczf6e29e32008-01-25 22:17:16 +0100442static ide_startstop_t pre_task_out_intr(ide_drive_t *drive, struct request *rq)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443{
444 ide_startstop_t startstop;
445
Bartlomiej Zolnierkiewicz4906f3b2008-01-26 20:13:11 +0100446 if (ide_wait_stat(&startstop, drive, DRQ_STAT,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447 drive->bad_wstat, WAIT_DRQ)) {
448 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
449 drive->name,
450 drive->hwif->data_phase ? "MULT" : "",
451 drive->addressing ? "_EXT" : "");
452 return startstop;
453 }
454
455 if (!drive->unmask)
456 local_irq_disable();
457
458 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
459 ide_pio_datablock(drive, rq, 1);
460
461 return ide_started;
462}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463
Bartlomiej Zolnierkiewiczac026ff2008-01-25 22:17:14 +0100464int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465{
FUJITA Tomonori154ed282008-07-15 21:21:43 +0200466 struct request *rq;
467 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468
FUJITA Tomonori154ed282008-07-15 21:21:43 +0200469 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
470 rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
471 rq->buffer = buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472
473 /*
474 * (ks) We transfer currently only whole sectors.
475 * This is suffient for now. But, it would be great,
476 * if we would find a solution to transfer any size.
477 * To support special commands like READ LONG.
478 */
FUJITA Tomonori154ed282008-07-15 21:21:43 +0200479 rq->hard_nr_sectors = rq->nr_sectors = nsect;
480 rq->hard_cur_sectors = rq->current_nr_sectors = nsect;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481
Bartlomiej Zolnierkiewiczac026ff2008-01-25 22:17:14 +0100482 if (task->tf_flags & IDE_TFLAG_WRITE)
FUJITA Tomonori154ed282008-07-15 21:21:43 +0200483 rq->cmd_flags |= REQ_RW;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484
FUJITA Tomonori154ed282008-07-15 21:21:43 +0200485 rq->special = task;
486 task->rq = rq;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487
FUJITA Tomonori154ed282008-07-15 21:21:43 +0200488 error = blk_execute_rq(drive->queue, NULL, rq, 0);
489 blk_put_request(rq);
490
491 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492}
493
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494EXPORT_SYMBOL(ide_raw_taskfile);
495
Bartlomiej Zolnierkiewicz9a3c49b2008-01-25 22:17:07 +0100496int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
497{
Bartlomiej Zolnierkiewiczac026ff2008-01-25 22:17:14 +0100498 task->data_phase = TASKFILE_NO_DATA;
Bartlomiej Zolnierkiewicz9a3c49b2008-01-25 22:17:07 +0100499
Bartlomiej Zolnierkiewiczac026ff2008-01-25 22:17:14 +0100500 return ide_raw_taskfile(drive, task, NULL, 0);
Bartlomiej Zolnierkiewicz9a3c49b2008-01-25 22:17:07 +0100501}
502EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
503
Bartlomiej Zolnierkiewicz26a5b042007-11-05 21:42:27 +0100504#ifdef CONFIG_IDE_TASK_IOCTL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
506{
507 ide_task_request_t *req_task;
508 ide_task_t args;
509 u8 *outbuf = NULL;
510 u8 *inbuf = NULL;
Bartlomiej Zolnierkiewiczac026ff2008-01-25 22:17:14 +0100511 u8 *data_buf = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512 int err = 0;
513 int tasksize = sizeof(struct ide_task_request_s);
Alan Cox3a42bb22006-10-16 16:31:02 +0100514 unsigned int taskin = 0;
515 unsigned int taskout = 0;
Bartlomiej Zolnierkiewiczac026ff2008-01-25 22:17:14 +0100516 u16 nsect = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517 char __user *buf = (char __user *)arg;
518
519// printk("IDE Taskfile ...\n");
520
Deepak Saxenaf5e3c2f2005-11-07 01:01:25 -0800521 req_task = kzalloc(tasksize, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 if (req_task == NULL) return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523 if (copy_from_user(req_task, buf, tasksize)) {
524 kfree(req_task);
525 return -EFAULT;
526 }
527
Alan Cox3a42bb22006-10-16 16:31:02 +0100528 taskout = req_task->out_size;
529 taskin = req_task->in_size;
530
531 if (taskin > 65536 || taskout > 65536) {
532 err = -EINVAL;
533 goto abort;
534 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535
536 if (taskout) {
537 int outtotal = tasksize;
Deepak Saxenaf5e3c2f2005-11-07 01:01:25 -0800538 outbuf = kzalloc(taskout, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539 if (outbuf == NULL) {
540 err = -ENOMEM;
541 goto abort;
542 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
544 err = -EFAULT;
545 goto abort;
546 }
547 }
548
549 if (taskin) {
550 int intotal = tasksize + taskout;
Deepak Saxenaf5e3c2f2005-11-07 01:01:25 -0800551 inbuf = kzalloc(taskin, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 if (inbuf == NULL) {
553 err = -ENOMEM;
554 goto abort;
555 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556 if (copy_from_user(inbuf, buf + intotal, taskin)) {
557 err = -EFAULT;
558 goto abort;
559 }
560 }
561
562 memset(&args, 0, sizeof(ide_task_t));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563
Bartlomiej Zolnierkiewicz650d8412008-01-25 22:17:06 +0100564 memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
565 memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
Bartlomiej Zolnierkiewicz866e2ec2008-01-25 22:17:14 +0100566
567 args.data_phase = req_task->data_phase;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568
Bartlomiej Zolnierkiewicz657cc1a2008-01-26 20:13:10 +0100569 args.tf_flags = IDE_TFLAG_IO_16BIT | IDE_TFLAG_DEVICE |
570 IDE_TFLAG_IN_TF;
Bartlomiej Zolnierkiewicza3bbb9d2008-01-25 22:17:10 +0100571 if (drive->addressing == 1)
Bartlomiej Zolnierkiewicz657cc1a2008-01-26 20:13:10 +0100572 args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_IN_HOB);
Bartlomiej Zolnierkiewicza3bbb9d2008-01-25 22:17:10 +0100573
Bartlomiej Zolnierkiewicz74095a92008-01-25 22:17:07 +0100574 if (req_task->out_flags.all) {
575 args.tf_flags |= IDE_TFLAG_FLAGGED;
576
577 if (req_task->out_flags.b.data)
578 args.tf_flags |= IDE_TFLAG_OUT_DATA;
579
580 if (req_task->out_flags.b.nsector_hob)
581 args.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
582 if (req_task->out_flags.b.sector_hob)
583 args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
584 if (req_task->out_flags.b.lcyl_hob)
585 args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
586 if (req_task->out_flags.b.hcyl_hob)
587 args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
588
589 if (req_task->out_flags.b.error_feature)
590 args.tf_flags |= IDE_TFLAG_OUT_FEATURE;
591 if (req_task->out_flags.b.nsector)
592 args.tf_flags |= IDE_TFLAG_OUT_NSECT;
593 if (req_task->out_flags.b.sector)
594 args.tf_flags |= IDE_TFLAG_OUT_LBAL;
595 if (req_task->out_flags.b.lcyl)
596 args.tf_flags |= IDE_TFLAG_OUT_LBAM;
597 if (req_task->out_flags.b.hcyl)
598 args.tf_flags |= IDE_TFLAG_OUT_LBAH;
Bartlomiej Zolnierkiewicza3bbb9d2008-01-25 22:17:10 +0100599 } else {
600 args.tf_flags |= IDE_TFLAG_OUT_TF;
601 if (args.tf_flags & IDE_TFLAG_LBA48)
602 args.tf_flags |= IDE_TFLAG_OUT_HOB;
Bartlomiej Zolnierkiewicz74095a92008-01-25 22:17:07 +0100603 }
604
Bartlomiej Zolnierkiewicz866e2ec2008-01-25 22:17:14 +0100605 if (req_task->in_flags.b.data)
606 args.tf_flags |= IDE_TFLAG_IN_DATA;
607
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608 switch(req_task->data_phase) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609 case TASKFILE_MULTI_OUT:
610 if (!drive->mult_count) {
611 /* (hs): give up if multcount is not set */
612 printk(KERN_ERR "%s: %s Multimode Write " \
613 "multcount is not set\n",
Harvey Harrisoneb639632008-04-26 22:25:20 +0200614 drive->name, __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615 err = -EPERM;
616 goto abort;
617 }
618 /* fall through */
619 case TASKFILE_OUT:
Bartlomiej Zolnierkiewiczac026ff2008-01-25 22:17:14 +0100620 /* fall through */
621 case TASKFILE_OUT_DMAQ:
622 case TASKFILE_OUT_DMA:
623 nsect = taskout / SECTOR_SIZE;
624 data_buf = outbuf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625 break;
626 case TASKFILE_MULTI_IN:
627 if (!drive->mult_count) {
628 /* (hs): give up if multcount is not set */
629 printk(KERN_ERR "%s: %s Multimode Read failure " \
630 "multcount is not set\n",
Harvey Harrisoneb639632008-04-26 22:25:20 +0200631 drive->name, __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632 err = -EPERM;
633 goto abort;
634 }
635 /* fall through */
636 case TASKFILE_IN:
Bartlomiej Zolnierkiewiczac026ff2008-01-25 22:17:14 +0100637 /* fall through */
638 case TASKFILE_IN_DMAQ:
639 case TASKFILE_IN_DMA:
640 nsect = taskin / SECTOR_SIZE;
641 data_buf = inbuf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642 break;
643 case TASKFILE_NO_DATA:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644 break;
645 default:
646 err = -EFAULT;
647 goto abort;
648 }
649
Bartlomiej Zolnierkiewiczac026ff2008-01-25 22:17:14 +0100650 if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
651 nsect = 0;
652 else if (!nsect) {
653 nsect = (args.tf.hob_nsect << 8) | args.tf.nsect;
654
655 if (!nsect) {
656 printk(KERN_ERR "%s: in/out command without data\n",
657 drive->name);
658 err = -EFAULT;
659 goto abort;
660 }
661 }
662
663 if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE)
664 args.tf_flags |= IDE_TFLAG_WRITE;
665
666 err = ide_raw_taskfile(drive, &args, data_buf, nsect);
667
Bartlomiej Zolnierkiewicz650d8412008-01-25 22:17:06 +0100668 memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
669 memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
Bartlomiej Zolnierkiewicz866e2ec2008-01-25 22:17:14 +0100670
671 if ((args.tf_flags & IDE_TFLAG_FLAGGED_SET_IN_FLAGS) &&
672 req_task->in_flags.all == 0) {
673 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
674 if (drive->addressing == 1)
675 req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
676 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677
678 if (copy_to_user(buf, req_task, tasksize)) {
679 err = -EFAULT;
680 goto abort;
681 }
682 if (taskout) {
683 int outtotal = tasksize;
684 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
685 err = -EFAULT;
686 goto abort;
687 }
688 }
689 if (taskin) {
690 int intotal = tasksize + taskout;
691 if (copy_to_user(buf + intotal, inbuf, taskin)) {
692 err = -EFAULT;
693 goto abort;
694 }
695 }
696abort:
697 kfree(req_task);
Jesper Juhl6044ec82005-11-07 01:01:32 -0800698 kfree(outbuf);
699 kfree(inbuf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700
701// printk("IDE Taskfile ioctl ended. rc = %i\n", err);
702
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703 return err;
704}
Bartlomiej Zolnierkiewicz26a5b042007-11-05 21:42:27 +0100705#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
708{
Bartlomiej Zolnierkiewicz5a9e77a2008-01-26 20:13:13 +0100709 u8 *buf = NULL;
710 int bufsize = 0, err = 0;
711 u8 args[4], xfer_rate = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712 ide_task_t tfargs;
Bartlomiej Zolnierkiewicz650d8412008-01-25 22:17:06 +0100713 struct ide_taskfile *tf = &tfargs.tf;
Bartlomiej Zolnierkiewicz5efe7c52008-02-02 19:56:46 +0100714 struct hd_driveid *id = drive->id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715
716 if (NULL == (void *) arg) {
FUJITA Tomonori154ed282008-07-15 21:21:43 +0200717 struct request *rq;
Bartlomiej Zolnierkiewicz145b75e2008-01-26 20:13:11 +0100718
FUJITA Tomonori154ed282008-07-15 21:21:43 +0200719 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
720 rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
721 err = blk_execute_rq(drive->queue, NULL, rq, 0);
722 blk_put_request(rq);
Bartlomiej Zolnierkiewicz145b75e2008-01-26 20:13:11 +0100723
FUJITA Tomonori154ed282008-07-15 21:21:43 +0200724 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725 }
726
727 if (copy_from_user(args, (void __user *)arg, 4))
728 return -EFAULT;
729
730 memset(&tfargs, 0, sizeof(ide_task_t));
Bartlomiej Zolnierkiewicz650d8412008-01-25 22:17:06 +0100731 tf->feature = args[2];
Bartlomiej Zolnierkiewicz5a9e77a2008-01-26 20:13:13 +0100732 if (args[0] == WIN_SMART) {
733 tf->nsect = args[3];
734 tf->lbal = args[1];
735 tf->lbam = 0x4f;
736 tf->lbah = 0xc2;
737 tfargs.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_IN_NSECT;
738 } else {
739 tf->nsect = args[1];
740 tfargs.tf_flags = IDE_TFLAG_OUT_FEATURE |
741 IDE_TFLAG_OUT_NSECT | IDE_TFLAG_IN_NSECT;
742 }
Bartlomiej Zolnierkiewicz650d8412008-01-25 22:17:06 +0100743 tf->command = args[0];
Bartlomiej Zolnierkiewicz5a9e77a2008-01-26 20:13:13 +0100744 tfargs.data_phase = args[3] ? TASKFILE_IN : TASKFILE_NO_DATA;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745
746 if (args[3]) {
Bartlomiej Zolnierkiewicz5a9e77a2008-01-26 20:13:13 +0100747 tfargs.tf_flags |= IDE_TFLAG_IO_16BIT;
748 bufsize = SECTOR_WORDS * 4 * args[3];
749 buf = kzalloc(bufsize, GFP_KERNEL);
750 if (buf == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752 }
Bartlomiej Zolnierkiewicz5a9e77a2008-01-26 20:13:13 +0100753
Bartlomiej Zolnierkiewicz5efe7c52008-02-02 19:56:46 +0100754 if (tf->command == WIN_SETFEATURES &&
755 tf->feature == SETFEATURES_XFER &&
756 tf->nsect >= XFER_SW_DMA_0 &&
757 (id->dma_ultra || id->dma_mword || id->dma_1word)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758 xfer_rate = args[1];
Bartlomiej Zolnierkiewiczaf10f772008-02-02 19:56:46 +0100759 if (tf->nsect > XFER_UDMA_2 && !eighty_ninty_three(drive)) {
760 printk(KERN_WARNING "%s: UDMA speeds >UDMA33 cannot "
761 "be set\n", drive->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762 goto abort;
Bartlomiej Zolnierkiewiczaf10f772008-02-02 19:56:46 +0100763 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764 }
765
Bartlomiej Zolnierkiewicz5a9e77a2008-01-26 20:13:13 +0100766 err = ide_raw_taskfile(drive, &tfargs, buf, args[3]);
767
768 args[0] = tf->status;
769 args[1] = tf->error;
770 args[2] = tf->nsect;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771
772 if (!err && xfer_rate) {
773 /* active-retuning-calls future */
774 ide_set_xfer_rate(drive, xfer_rate);
775 ide_driveid_update(drive);
776 }
777abort:
Bartlomiej Zolnierkiewicz5a9e77a2008-01-26 20:13:13 +0100778 if (copy_to_user((void __user *)arg, &args, 4))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779 err = -EFAULT;
Bartlomiej Zolnierkiewicz5a9e77a2008-01-26 20:13:13 +0100780 if (buf) {
781 if (copy_to_user((void __user *)(arg + 4), buf, bufsize))
782 err = -EFAULT;
783 kfree(buf);
784 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785 return err;
786}
787
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
789{
790 void __user *p = (void __user *)arg;
791 int err = 0;
Bartlomiej Zolnierkiewicz14b89ef2008-01-25 22:17:11 +0100792 u8 args[7];
793 ide_task_t task;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794
795 if (copy_from_user(args, p, 7))
796 return -EFAULT;
Bartlomiej Zolnierkiewicz14b89ef2008-01-25 22:17:11 +0100797
798 memset(&task, 0, sizeof(task));
799 memcpy(&task.tf_array[7], &args[1], 6);
800 task.tf.command = args[0];
Bartlomiej Zolnierkiewicz657cc1a2008-01-26 20:13:10 +0100801 task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
Bartlomiej Zolnierkiewicz14b89ef2008-01-25 22:17:11 +0100802
803 err = ide_no_data_taskfile(drive, &task);
804
805 args[0] = task.tf.command;
806 memcpy(&args[1], &task.tf_array[7], 6);
807
808 if (copy_to_user(p, args, 7))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809 err = -EFAULT;
Bartlomiej Zolnierkiewicz14b89ef2008-01-25 22:17:11 +0100810
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811 return err;
812}