ide: add struct ide_taskfile (take 2)
[linux-2.6.git] / drivers / ide / ide-taskfile.c
1 /*
2  * linux/drivers/ide/ide-taskfile.c     Version 0.38    March 05, 2003
3  *
4  *  Copyright (C) 2000-2002     Michael Cornwell <cornwell@acm.org>
5  *  Copyright (C) 2000-2002     Andre Hedrick <andre@linux-ide.org>
6  *  Copyright (C) 2001-2002     Klaus Smolin
7  *                                      IBM Storage Technology Division
8  *  Copyright (C) 2003-2004     Bartlomiej Zolnierkiewicz
9  *
10  *  The big the bad and the ugly.
11  */
12
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>
19 #include <linux/sched.h>
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>
31 #include <linux/scatterlist.h>
32
33 #include <asm/byteorder.h>
34 #include <asm/irq.h>
35 #include <asm/uaccess.h>
36 #include <asm/io.h>
37
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
70         memset(&args, 0, sizeof(ide_task_t));
71         args.tf.nsect = 0x01;
72         if (drive->media == ide_disk)
73                 args.tf.command = WIN_IDENTIFY;
74         else
75                 args.tf.command = WIN_PIDENTIFY;
76         args.command_type = IDE_DRIVE_TASK_IN;
77         args.data_phase   = TASKFILE_IN;
78         args.handler      = &task_in_intr;
79         return ide_raw_taskfile(drive, &args, buf);
80 }
81
82 ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
83 {
84         ide_hwif_t *hwif        = HWIF(drive);
85         struct ide_taskfile *tf = &task->tf;
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(tf->hob_feature, IDE_FEATURE_REG);
97                 hwif->OUTB(tf->hob_nsect, IDE_NSECTOR_REG);
98                 hwif->OUTB(tf->hob_lbal, IDE_SECTOR_REG);
99                 hwif->OUTB(tf->hob_lbam, IDE_LCYL_REG);
100                 hwif->OUTB(tf->hob_lbah, IDE_HCYL_REG);
101         }
102
103         hwif->OUTB(tf->feature, IDE_FEATURE_REG);
104         hwif->OUTB(tf->nsect, IDE_NSECTOR_REG);
105         hwif->OUTB(tf->lbal, IDE_SECTOR_REG);
106         hwif->OUTB(tf->lbam, IDE_LCYL_REG);
107         hwif->OUTB(tf->lbah, IDE_HCYL_REG);
108
109         hwif->OUTB((tf->device & HIHI) | drive->select.all, IDE_SELECT_REG);
110
111         if (task->handler != NULL) {
112                 if (task->prehandler != NULL) {
113                         hwif->OUTBSYNC(drive, tf->command, IDE_COMMAND_REG);
114                         ndelay(400);    /* FIXME */
115                         return task->prehandler(drive, task->rq);
116                 }
117                 ide_execute_command(drive, tf->command, task->handler, WAIT_WORSTCASE, NULL);
118                 return ide_started;
119         }
120
121         if (!drive->using_dma)
122                 return ide_stopped;
123
124         switch (tf->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, tf->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
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
182         BUG_ON(HWGROUP(drive)->handler != NULL);
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
209         local_irq_enable_in_hardirq();
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);
225         int retries;
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          */
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         }
239
240         if (stat & BUSY_STAT)
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;
250         struct scatterlist *cursg = hwif->cursg;
251         struct page *page;
252 #ifdef CONFIG_HIGHMEM
253         unsigned long flags;
254 #endif
255         unsigned int offset;
256         u8 *buf;
257
258         cursg = hwif->cursg;
259         if (!cursg) {
260                 cursg = sg;
261                 hwif->cursg = sg;
262         }
263
264         page = sg_page(cursg);
265         offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
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
279         if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
280                 hwif->cursg = sg_next(hwif->cursg);
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
305 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
306                                      unsigned int write)
307 {
308         if (rq->bio)    /* fs request */
309                 rq->errors = 0;
310
311         touch_softlockup_watchdog();
312
313         switch (drive->hwif->data_phase) {
314         case TASKFILE_MULTI_IN:
315         case TASKFILE_MULTI_OUT:
316                 ide_pio_multi(drive, 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 {
361         HWIF(drive)->cursg = NULL;
362
363         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
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
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);
380 }
381
382 /*
383  * Handler for command with PIO data-in phase (Read/Read Multiple).
384  */
385 ide_startstop_t task_in_intr (ide_drive_t *drive)
386 {
387         ide_hwif_t *hwif = drive->hwif;
388         struct request *rq = HWGROUP(drive)->rq;
389         u8 stat = hwif->INB(IDE_STATUS_REG);
390
391         /* new way for dealing with premature shared PCI interrupts */
392         if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) {
393                 if (stat & (ERR_STAT | DRQ_STAT))
394                         return task_error(drive, rq, __FUNCTION__, stat);
395                 /* No data yet, so wait for another IRQ. */
396                 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
397                 return ide_started;
398         }
399
400         ide_pio_datablock(drive, rq, 0);
401
402         /* If it was the last datablock check status and finish transfer. */
403         if (!hwif->nleft) {
404                 stat = wait_drive_not_busy(drive);
405                 if (!OK_STAT(stat, 0, BAD_R_STAT))
406                         return task_error(drive, rq, __FUNCTION__, stat);
407                 task_end_request(drive, rq, stat);
408                 return ide_stopped;
409         }
410
411         /* Still data left to transfer. */
412         ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
413
414         return ide_started;
415 }
416 EXPORT_SYMBOL(task_in_intr);
417
418 /*
419  * Handler for command with PIO data-out phase (Write/Write Multiple).
420  */
421 static ide_startstop_t task_out_intr (ide_drive_t *drive)
422 {
423         ide_hwif_t *hwif = drive->hwif;
424         struct request *rq = HWGROUP(drive)->rq;
425         u8 stat = hwif->INB(IDE_STATUS_REG);
426
427         if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
428                 return task_error(drive, rq, __FUNCTION__, stat);
429
430         /* Deal with unexpected ATA data phase. */
431         if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
432                 return task_error(drive, rq, __FUNCTION__, stat);
433
434         if (!hwif->nleft) {
435                 task_end_request(drive, rq, stat);
436                 return ide_stopped;
437         }
438
439         /* Still data left to transfer. */
440         ide_pio_datablock(drive, rq, 1);
441         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
442
443         return ide_started;
444 }
445
446 ide_startstop_t pre_task_out_intr (ide_drive_t *drive, struct request *rq)
447 {
448         ide_startstop_t startstop;
449
450         if (ide_wait_stat(&startstop, drive, DATA_READY,
451                           drive->bad_wstat, WAIT_DRQ)) {
452                 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
453                                 drive->name,
454                                 drive->hwif->data_phase ? "MULT" : "",
455                                 drive->addressing ? "_EXT" : "");
456                 return startstop;
457         }
458
459         if (!drive->unmask)
460                 local_irq_disable();
461
462         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
463         ide_pio_datablock(drive, rq, 1);
464
465         return ide_started;
466 }
467 EXPORT_SYMBOL(pre_task_out_intr);
468
469 static int ide_diag_taskfile(ide_drive_t *drive, ide_task_t *args, unsigned long data_size, u8 *buf)
470 {
471         struct request rq;
472
473         memset(&rq, 0, sizeof(rq));
474         rq.ref_count = 1;
475         rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
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->tf.hob_nsect << 8) | args->tf.nsect;
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)
500                         rq.cmd_flags |= REQ_RW;
501         }
502
503         rq.special = args;
504         args->rq = &rq;
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 #ifdef CONFIG_IDE_TASK_IOCTL
516 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
517 {
518         ide_task_request_t      *req_task;
519         ide_task_t              args;
520         u8 *outbuf              = NULL;
521         u8 *inbuf               = NULL;
522         int err                 = 0;
523         int tasksize            = sizeof(struct ide_task_request_s);
524         unsigned int taskin     = 0;
525         unsigned int taskout    = 0;
526         u8 io_32bit             = drive->io_32bit;
527         char __user *buf = (char __user *)arg;
528
529 //      printk("IDE Taskfile ...\n");
530
531         req_task = kzalloc(tasksize, GFP_KERNEL);
532         if (req_task == NULL) return -ENOMEM;
533         if (copy_from_user(req_task, buf, tasksize)) {
534                 kfree(req_task);
535                 return -EFAULT;
536         }
537
538         taskout = req_task->out_size;
539         taskin  = req_task->in_size;
540         
541         if (taskin > 65536 || taskout > 65536) {
542                 err = -EINVAL;
543                 goto abort;
544         }
545
546         if (taskout) {
547                 int outtotal = tasksize;
548                 outbuf = kzalloc(taskout, GFP_KERNEL);
549                 if (outbuf == NULL) {
550                         err = -ENOMEM;
551                         goto abort;
552                 }
553                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
554                         err = -EFAULT;
555                         goto abort;
556                 }
557         }
558
559         if (taskin) {
560                 int intotal = tasksize + taskout;
561                 inbuf = kzalloc(taskin, GFP_KERNEL);
562                 if (inbuf == NULL) {
563                         err = -ENOMEM;
564                         goto abort;
565                 }
566                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
567                         err = -EFAULT;
568                         goto abort;
569                 }
570         }
571
572         memset(&args, 0, sizeof(ide_task_t));
573
574         memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
575         memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
576         args.tf_in_flags  = req_task->in_flags;
577         args.tf_out_flags = req_task->out_flags;
578         args.data_phase   = req_task->data_phase;
579         args.command_type = req_task->req_cmd;
580
581         drive->io_32bit = 0;
582         switch(req_task->data_phase) {
583                 case TASKFILE_OUT_DMAQ:
584                 case TASKFILE_OUT_DMA:
585                         err = ide_diag_taskfile(drive, &args, taskout, outbuf);
586                         break;
587                 case TASKFILE_IN_DMAQ:
588                 case TASKFILE_IN_DMA:
589                         err = ide_diag_taskfile(drive, &args, taskin, inbuf);
590                         break;
591                 case TASKFILE_MULTI_OUT:
592                         if (!drive->mult_count) {
593                                 /* (hs): give up if multcount is not set */
594                                 printk(KERN_ERR "%s: %s Multimode Write " \
595                                         "multcount is not set\n",
596                                         drive->name, __FUNCTION__);
597                                 err = -EPERM;
598                                 goto abort;
599                         }
600                         /* fall through */
601                 case TASKFILE_OUT:
602                         args.prehandler = &pre_task_out_intr;
603                         args.handler = &task_out_intr;
604                         err = ide_diag_taskfile(drive, &args, taskout, outbuf);
605                         break;
606                 case TASKFILE_MULTI_IN:
607                         if (!drive->mult_count) {
608                                 /* (hs): give up if multcount is not set */
609                                 printk(KERN_ERR "%s: %s Multimode Read failure " \
610                                         "multcount is not set\n",
611                                         drive->name, __FUNCTION__);
612                                 err = -EPERM;
613                                 goto abort;
614                         }
615                         /* fall through */
616                 case TASKFILE_IN:
617                         args.handler = &task_in_intr;
618                         err = ide_diag_taskfile(drive, &args, taskin, inbuf);
619                         break;
620                 case TASKFILE_NO_DATA:
621                         args.handler = &task_no_data_intr;
622                         err = ide_diag_taskfile(drive, &args, 0, NULL);
623                         break;
624                 default:
625                         err = -EFAULT;
626                         goto abort;
627         }
628
629         memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
630         memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
631         req_task->in_flags  = args.tf_in_flags;
632         req_task->out_flags = args.tf_out_flags;
633
634         if (copy_to_user(buf, req_task, tasksize)) {
635                 err = -EFAULT;
636                 goto abort;
637         }
638         if (taskout) {
639                 int outtotal = tasksize;
640                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
641                         err = -EFAULT;
642                         goto abort;
643                 }
644         }
645         if (taskin) {
646                 int intotal = tasksize + taskout;
647                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
648                         err = -EFAULT;
649                         goto abort;
650                 }
651         }
652 abort:
653         kfree(req_task);
654         kfree(outbuf);
655         kfree(inbuf);
656
657 //      printk("IDE Taskfile ioctl ended. rc = %i\n", err);
658
659         drive->io_32bit = io_32bit;
660
661         return err;
662 }
663 #endif
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
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         struct ide_taskfile *tf = &tfargs.tf;
690
691         if (NULL == (void *) arg) {
692                 struct request rq;
693                 ide_init_drive_cmd(&rq);
694                 return ide_do_drive_cmd(drive, &rq, ide_wait);
695         }
696
697         if (copy_from_user(args, (void __user *)arg, 4))
698                 return -EFAULT;
699
700         memset(&tfargs, 0, sizeof(ide_task_t));
701         tf->feature = args[2];
702         tf->nsect   = args[3];
703         tf->lbal    = args[1];
704         tf->command = args[0];
705
706         if (args[3]) {
707                 argsize = 4 + (SECTOR_WORDS * 4 * args[3]);
708                 argbuf = kzalloc(argsize, GFP_KERNEL);
709                 if (argbuf == NULL)
710                         return -ENOMEM;
711         }
712         if (set_transfer(drive, &tfargs)) {
713                 xfer_rate = args[1];
714                 if (ide_ata66_check(drive, &tfargs))
715                         goto abort;
716         }
717
718         err = ide_wait_cmd(drive, args[0], args[1], args[2], args[3], argbuf);
719
720         if (!err && xfer_rate) {
721                 /* active-retuning-calls future */
722                 ide_set_xfer_rate(drive, xfer_rate);
723                 ide_driveid_update(drive);
724         }
725 abort:
726         if (copy_to_user((void __user *)arg, argbuf, argsize))
727                 err = -EFAULT;
728         if (argsize > 4)
729                 kfree(argbuf);
730         return err;
731 }
732
733 static int ide_wait_cmd_task(ide_drive_t *drive, u8 *buf)
734 {
735         struct request rq;
736
737         ide_init_drive_cmd(&rq);
738         rq.cmd_type = REQ_TYPE_ATA_TASK;
739         rq.buffer = buf;
740         return ide_do_drive_cmd(drive, &rq, ide_wait);
741 }
742
743 int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
744 {
745         void __user *p = (void __user *)arg;
746         int err = 0;
747         u8 args[7], *argbuf = args;
748         int argsize = 7;
749
750         if (copy_from_user(args, p, 7))
751                 return -EFAULT;
752         err = ide_wait_cmd_task(drive, argbuf);
753         if (copy_to_user(p, argbuf, argsize))
754                 err = -EFAULT;
755         return err;
756 }
757
758 /*
759  * NOTICE: This is additions from IBM to provide a discrete interface,
760  * for selective taskregister access operations.  Nice JOB Klaus!!!
761  * Glad to be able to work and co-develop this with you and IBM.
762  */
763 ide_startstop_t flagged_taskfile (ide_drive_t *drive, ide_task_t *task)
764 {
765         ide_hwif_t *hwif        = HWIF(drive);
766         struct ide_taskfile *tf = &task->tf;
767
768         if (task->data_phase == TASKFILE_MULTI_IN ||
769             task->data_phase == TASKFILE_MULTI_OUT) {
770                 if (!drive->mult_count) {
771                         printk(KERN_ERR "%s: multimode not set!\n", drive->name);
772                         return ide_stopped;
773                 }
774         }
775
776         /*
777          * (ks) Check taskfile in flags.
778          * If set, then execute as it is defined.
779          * If not set, then define default settings.
780          * The default values are:
781          *      read all taskfile registers (except data)
782          *      read the hob registers (sector, nsector, lcyl, hcyl)
783          */
784         if (task->tf_in_flags.all == 0) {
785                 task->tf_in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
786                 if (drive->addressing == 1)
787                         task->tf_in_flags.all |= (IDE_HOB_STD_IN_FLAGS  << 8);
788         }
789
790         /* ALL Command Block Executions SHALL clear nIEN, unless otherwise */
791         if (IDE_CONTROL_REG)
792                 /* clear nIEN */
793                 hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
794         SELECT_MASK(drive, 0);
795
796         if (task->tf_out_flags.b.data)
797                 hwif->OUTW((tf->hob_data << 8) | tf->data, IDE_DATA_REG);
798
799         /* (ks) send hob registers first */
800         if (task->tf_out_flags.b.nsector_hob)
801                 hwif->OUTB(tf->hob_nsect, IDE_NSECTOR_REG);
802         if (task->tf_out_flags.b.sector_hob)
803                 hwif->OUTB(tf->hob_lbal, IDE_SECTOR_REG);
804         if (task->tf_out_flags.b.lcyl_hob)
805                 hwif->OUTB(tf->hob_lbam, IDE_LCYL_REG);
806         if (task->tf_out_flags.b.hcyl_hob)
807                 hwif->OUTB(tf->hob_lbah, IDE_HCYL_REG);
808
809         /* (ks) Send now the standard registers */
810         if (task->tf_out_flags.b.error_feature)
811                 hwif->OUTB(tf->feature, IDE_FEATURE_REG);
812         /* refers to number of sectors to transfer */
813         if (task->tf_out_flags.b.nsector)
814                 hwif->OUTB(tf->nsect, IDE_NSECTOR_REG);
815         /* refers to sector offset or start sector */
816         if (task->tf_out_flags.b.sector)
817                 hwif->OUTB(tf->lbal, IDE_SECTOR_REG);
818         if (task->tf_out_flags.b.lcyl)
819                 hwif->OUTB(tf->lbam, IDE_LCYL_REG);
820         if (task->tf_out_flags.b.hcyl)
821                 hwif->OUTB(tf->lbah, IDE_HCYL_REG);
822
823         /*
824          * (ks) In the flagged taskfile approch, we will use all specified
825          * registers and the register value will not be changed, except the
826          * select bit (master/slave) in the drive_head register. We must make
827          * sure that the desired drive is selected.
828          */
829         hwif->OUTB(tf->device | drive->select.all, IDE_SELECT_REG);
830         switch(task->data_phase) {
831
832                 case TASKFILE_OUT_DMAQ:
833                 case TASKFILE_OUT_DMA:
834                 case TASKFILE_IN_DMAQ:
835                 case TASKFILE_IN_DMA:
836                         if (!drive->using_dma)
837                                 break;
838
839                         if (!hwif->dma_setup(drive)) {
840                                 hwif->dma_exec_cmd(drive, tf->command);
841                                 hwif->dma_start(drive);
842                                 return ide_started;
843                         }
844                         break;
845
846                 default:
847                         if (task->handler == NULL)
848                                 return ide_stopped;
849
850                         /* Issue the command */
851                         if (task->prehandler) {
852                                 hwif->OUTBSYNC(drive, tf->command, IDE_COMMAND_REG);
853                                 ndelay(400);    /* FIXME */
854                                 return task->prehandler(drive, task->rq);
855                         }
856                         ide_execute_command(drive, tf->command, task->handler, WAIT_WORSTCASE, NULL);
857                         return ide_started;
858         }
859
860         return ide_stopped;
861 }