[deliverable/linux.git] / drivers / ide / ide-floppy_ioctl.c

/*
 * ide-floppy IOCTLs handling.
 */

#include <linux/kernel.h>
#include <linux/ide.h>
#include <linux/cdrom.h>

#include <asm/unaligned.h>

#include <scsi/scsi_ioctl.h>

#include "ide-floppy.h"

/*
 * Obtain the list of formattable capacities.
 * Very similar to ide_floppy_get_capacity, except that we push the capacity
 * descriptors to userland, instead of our own structures.
 *
 * Userland gives us the following structure:
 *
 * struct idefloppy_format_capacities {
 *	int nformats;
 *	struct {
 *		int nblocks;
 *		int blocksize;
 *	} formats[];
 * };
 *
 * userland initializes nformats to the number of allocated formats[] records.
 * On exit we set nformats to the number of records we've actually initialized.
 */

static int ide_floppy_get_format_capacities(ide_drive_t *drive,
					    struct ide_atapi_pc *pc,
					    int __user *arg)
{
	struct ide_disk_obj *floppy = drive->driver_data;
	u8 header_len, desc_cnt;
	int i, blocks, length, u_array_size, u_index;
	int __user *argp;

	if (get_user(u_array_size, arg))
		return -EFAULT;

	if (u_array_size <= 0)
		return -EINVAL;

	ide_floppy_create_read_capacity_cmd(pc);
	if (ide_queue_pc_tail(drive, floppy->disk, pc)) {
		printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
		return -EIO;
	}

	header_len = pc->buf[3];
	desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */

	u_index = 0;
	argp = arg + 1;

	/*
	 * We always skip the first capacity descriptor.  That's the current
	 * capacity.  We are interested in the remaining descriptors, the
	 * formattable capacities.
	 */
	for (i = 1; i < desc_cnt; i++) {
		unsigned int desc_start = 4 + i*8;

		if (u_index >= u_array_size)
			break;	/* User-supplied buffer too small */

		blocks = be32_to_cpup((__be32 *)&pc->buf[desc_start]);
		length = be16_to_cpup((__be16 *)&pc->buf[desc_start + 6]);

		if (put_user(blocks, argp))
			return -EFAULT;

		++argp;

		if (put_user(length, argp))
			return -EFAULT;

		++argp;

		++u_index;
	}

	if (put_user(u_index, arg))
		return -EFAULT;

	return 0;
}

static void ide_floppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b,
		int l, int flags)
{
	ide_init_pc(pc);
	pc->c[0] = GPCMD_FORMAT_UNIT;
	pc->c[1] = 0x17;

	memset(pc->buf, 0, 12);
	pc->buf[1] = 0xA2;
	/* Default format list header, u8 1: FOV/DCRT/IMM bits set */

	if (flags & 1)				/* Verify bit on... */
		pc->buf[1] ^= 0x20;		/* ... turn off DCRT bit */
	pc->buf[3] = 8;

	put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buf[4]));
	put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buf[8]));
	pc->buf_size = 12;
	pc->flags |= PC_FLAG_WRITING;
}

static int ide_floppy_get_sfrp_bit(ide_drive_t *drive, struct ide_atapi_pc *pc)
{
	struct ide_disk_obj *floppy = drive->driver_data;

	drive->atapi_flags &= ~IDE_AFLAG_SRFP;

	ide_floppy_create_mode_sense_cmd(pc, IDEFLOPPY_CAPABILITIES_PAGE);
	pc->flags |= PC_FLAG_SUPPRESS_ERROR;

	if (ide_queue_pc_tail(drive, floppy->disk, pc))
		return 1;

	if (pc->buf[8 + 2] & 0x40)
		drive->atapi_flags |= IDE_AFLAG_SRFP;

	return 0;
}

static int ide_floppy_format_unit(ide_drive_t *drive, struct ide_atapi_pc *pc,
				  int __user *arg)
{
	struct ide_disk_obj *floppy = drive->driver_data;
	int blocks, length, flags, err = 0;

	if (floppy->openers > 1) {
		/* Don't format if someone is using the disk */
		drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS;
		return -EBUSY;
	}

	drive->dev_flags |= IDE_DFLAG_FORMAT_IN_PROGRESS;

	/*
	 * Send ATAPI_FORMAT_UNIT to the drive.
	 *
	 * Userland gives us the following structure:
	 *
	 * struct idefloppy_format_command {
	 *        int nblocks;
	 *        int blocksize;
	 *        int flags;
	 *        } ;
	 *
	 * flags is a bitmask, currently, the only defined flag is:
	 *
	 *        0x01 - verify media after format.
	 */
	if (get_user(blocks, arg) ||
			get_user(length, arg+1) ||
			get_user(flags, arg+2)) {
		err = -EFAULT;
		goto out;
	}

	ide_floppy_get_sfrp_bit(drive, pc);
	ide_floppy_create_format_unit_cmd(pc, blocks, length, flags);

	if (ide_queue_pc_tail(drive, floppy->disk, pc))
		err = -EIO;

out:
	if (err)
		drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS;
	return err;
}

/*
 * Get ATAPI_FORMAT_UNIT progress indication.
 *
 * Userland gives a pointer to an int.  The int is set to a progress
 * indicator 0-65536, with 65536=100%.
 *
 * If the drive does not support format progress indication, we just check
 * the dsc bit, and return either 0 or 65536.
 */

static int ide_floppy_get_format_progress(ide_drive_t *drive,
					  struct ide_atapi_pc *pc,
					  int __user *arg)
{
	struct ide_disk_obj *floppy = drive->driver_data;
	int progress_indication = 0x10000;

	if (drive->atapi_flags & IDE_AFLAG_SRFP) {
		ide_create_request_sense_cmd(drive, pc);
		if (ide_queue_pc_tail(drive, floppy->disk, pc))
			return -EIO;

		if (floppy->sense_key == 2 &&
		    floppy->asc == 4 &&
		    floppy->ascq == 4)
			progress_indication = floppy->progress_indication;

		/* Else assume format_unit has finished, and we're at 0x10000 */
	} else {
		ide_hwif_t *hwif = drive->hwif;
		unsigned long flags;
		u8 stat;

		local_irq_save(flags);
		stat = hwif->tp_ops->read_status(hwif);
		local_irq_restore(flags);

		progress_indication = ((stat & ATA_DSC) == 0) ? 0 : 0x10000;
	}

	if (put_user(progress_indication, arg))
		return -EFAULT;

	return 0;
}

static int ide_floppy_lockdoor(ide_drive_t *drive, struct ide_atapi_pc *pc,
			       unsigned long arg, unsigned int cmd)
{
	struct ide_disk_obj *floppy = drive->driver_data;
	struct gendisk *disk = floppy->disk;
	int prevent = (arg && cmd != CDROMEJECT) ? 1 : 0;

	if (floppy->openers > 1)
		return -EBUSY;

	ide_set_media_lock(drive, disk, prevent);

	if (cmd == CDROMEJECT)
		ide_do_start_stop(drive, disk, 2);

	return 0;
}

static int ide_floppy_format_ioctl(ide_drive_t *drive, struct ide_atapi_pc *pc,
				   fmode_t mode, unsigned int cmd,
				   void __user *argp)
{
	switch (cmd) {
	case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
		return 0;
	case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
		return ide_floppy_get_format_capacities(drive, pc, argp);
	case IDEFLOPPY_IOCTL_FORMAT_START:
		if (!(mode & FMODE_WRITE))
			return -EPERM;
		return ide_floppy_format_unit(drive, pc, (int __user *)argp);
	case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
		return ide_floppy_get_format_progress(drive, pc, argp);
	default:
		return -ENOTTY;
	}
}

int ide_floppy_ioctl(ide_drive_t *drive, struct block_device *bdev,
		     fmode_t mode, unsigned int cmd, unsigned long arg)
{
	struct ide_atapi_pc pc;
	void __user *argp = (void __user *)arg;
	int err;

	if (cmd == CDROMEJECT || cmd == CDROM_LOCKDOOR)
		return ide_floppy_lockdoor(drive, &pc, arg, cmd);

	err = ide_floppy_format_ioctl(drive, &pc, mode, cmd, argp);
	if (err != -ENOTTY)
		return err;

	/*
	 * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
	 * and CDROM_SEND_PACKET (legacy) ioctls
	 */
	if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
		err = scsi_cmd_ioctl(bdev->bd_disk->queue, bdev->bd_disk,
				mode, cmd, argp);

	if (err == -ENOTTY)
		err = generic_ide_ioctl(drive, bdev, cmd, arg);

	return err;
}
Commit	Line	Data
0127854d BZ	1	/*
	2	* ide-floppy IOCTLs handling.
	3	*/
	4
	5	#include <linux/kernel.h>
	6	#include <linux/ide.h>
	7	#include <linux/cdrom.h>
	8
	9	#include <asm/unaligned.h>
	10
	11	#include <scsi/scsi_ioctl.h>
	12
	13	#include "ide-floppy.h"
	14
	15	/*
	16	* Obtain the list of formattable capacities.
	17	* Very similar to ide_floppy_get_capacity, except that we push the capacity
	18	* descriptors to userland, instead of our own structures.
	19	*
	20	* Userland gives us the following structure:
	21	*
	22	* struct idefloppy_format_capacities {
	23	* int nformats;
	24	* struct {
	25	* int nblocks;
	26	* int blocksize;
	27	* } formats[];
	28	* };
	29	*
	30	* userland initializes nformats to the number of allocated formats[] records.
	31	* On exit we set nformats to the number of records we've actually initialized.
	32	*/
	33
07bd3f47 LT	34	static int ide_floppy_get_format_capacities(ide_drive_t *drive,
	35	struct ide_atapi_pc *pc,
	36	int __user *arg)
0127854d	37	{
806f80a6	38	struct ide_disk_obj *floppy = drive->driver_data;
0127854d BZ	39	u8 header_len, desc_cnt;
	40	int i, blocks, length, u_array_size, u_index;
	41	int __user *argp;
	42
	43	if (get_user(u_array_size, arg))
	44	return -EFAULT;
	45
	46	if (u_array_size <= 0)
	47	return -EINVAL;
	48
07bd3f47 LT	49	ide_floppy_create_read_capacity_cmd(pc);
07bd3f47 LT	50	if (ide_queue_pc_tail(drive, floppy->disk, pc)) {
0127854d BZ	51	printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
	52	return -EIO;
	53	}
	54
07bd3f47	55	header_len = pc->buf[3];
0127854d BZ	56	desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
	57
	58	u_index = 0;
	59	argp = arg + 1;
	60
	61	/*
	62	* We always skip the first capacity descriptor. That's the current
	63	* capacity. We are interested in the remaining descriptors, the
	64	* formattable capacities.
	65	*/
	66	for (i = 1; i < desc_cnt; i++) {
	67	unsigned int desc_start = 4 + i*8;
	68
	69	if (u_index >= u_array_size)
	70	break; /* User-supplied buffer too small */
	71
07bd3f47 LT	72	blocks = be32_to_cpup((__be32 *)&pc->buf[desc_start]);
07bd3f47 LT	73	length = be16_to_cpup((__be16 *)&pc->buf[desc_start + 6]);
0127854d BZ	74
	75	if (put_user(blocks, argp))
	76	return -EFAULT;
	77
	78	++argp;
	79
	80	if (put_user(length, argp))
	81	return -EFAULT;
	82
	83	++argp;
	84
	85	++u_index;
	86	}
	87
	88	if (put_user(u_index, arg))
	89	return -EFAULT;
	90
	91	return 0;
	92	}
	93
	94	static void ide_floppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b,
	95	int l, int flags)
	96	{
	97	ide_init_pc(pc);
	98	pc->c[0] = GPCMD_FORMAT_UNIT;
	99	pc->c[1] = 0x17;
	100
	101	memset(pc->buf, 0, 12);
	102	pc->buf[1] = 0xA2;
	103	/* Default format list header, u8 1: FOV/DCRT/IMM bits set */
	104
	105	if (flags & 1) /* Verify bit on... */
	106	pc->buf[1] ^= 0x20; /* ... turn off DCRT bit */
	107	pc->buf[3] = 8;
	108
	109	put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buf[4]));
	110	put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buf[8]));
	111	pc->buf_size = 12;
	112	pc->flags \|= PC_FLAG_WRITING;
	113	}
	114
07bd3f47	115	static int ide_floppy_get_sfrp_bit(ide_drive_t drive, struct ide_atapi_pc pc)
0127854d	116	{
0df96277	117	struct ide_disk_obj *floppy = drive->driver_data;
0127854d BZ	118
	119	drive->atapi_flags &= ~IDE_AFLAG_SRFP;
	120
07bd3f47 LT	121	ide_floppy_create_mode_sense_cmd(pc, IDEFLOPPY_CAPABILITIES_PAGE);
07bd3f47 LT	122	pc->flags \|= PC_FLAG_SUPPRESS_ERROR;
0127854d	123
07bd3f47	124	if (ide_queue_pc_tail(drive, floppy->disk, pc))
0127854d BZ	125	return 1;
0127854d BZ	126
07bd3f47	127	if (pc->buf[8 + 2] & 0x40)
0127854d BZ	128	drive->atapi_flags \|= IDE_AFLAG_SRFP;
	129
	130	return 0;
	131	}
	132
07bd3f47 LT	133	static int ide_floppy_format_unit(ide_drive_t drive, struct ide_atapi_pc pc,
07bd3f47 LT	134	int __user *arg)
0127854d	135	{
0df96277	136	struct ide_disk_obj *floppy = drive->driver_data;
0127854d BZ	137	int blocks, length, flags, err = 0;
	138
	139	if (floppy->openers > 1) {
	140	/* Don't format if someone is using the disk */
e0128628	141	drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS;
0127854d BZ	142	return -EBUSY;
	143	}
	144
e0128628	145	drive->dev_flags \|= IDE_DFLAG_FORMAT_IN_PROGRESS;
0127854d BZ	146
	147	/*
	148	* Send ATAPI_FORMAT_UNIT to the drive.
	149	*
	150	* Userland gives us the following structure:
	151	*
	152	* struct idefloppy_format_command {
	153	* int nblocks;
	154	* int blocksize;
	155	* int flags;
	156	* } ;
	157	*
	158	* flags is a bitmask, currently, the only defined flag is:
	159	*
	160	* 0x01 - verify media after format.
	161	*/
	162	if (get_user(blocks, arg) \|\|
	163	get_user(length, arg+1) \|\|
	164	get_user(flags, arg+2)) {
	165	err = -EFAULT;
	166	goto out;
	167	}
	168
07bd3f47 LT	169	ide_floppy_get_sfrp_bit(drive, pc);
07bd3f47 LT	170	ide_floppy_create_format_unit_cmd(pc, blocks, length, flags);
0127854d	171
07bd3f47	172	if (ide_queue_pc_tail(drive, floppy->disk, pc))
0127854d BZ	173	err = -EIO;
	174
	175	out:
	176	if (err)
e0128628	177	drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS;
0127854d BZ	178	return err;
	179	}
	180
	181	/*
	182	* Get ATAPI_FORMAT_UNIT progress indication.
	183	*
	184	* Userland gives a pointer to an int. The int is set to a progress
	185	* indicator 0-65536, with 65536=100%.
	186	*
	187	* If the drive does not support format progress indication, we just check
	188	* the dsc bit, and return either 0 or 65536.
	189	*/
	190
07bd3f47 LT	191	static int ide_floppy_get_format_progress(ide_drive_t *drive,
	192	struct ide_atapi_pc *pc,
	193	int __user *arg)
0127854d	194	{
0df96277	195	struct ide_disk_obj *floppy = drive->driver_data;
0127854d BZ	196	int progress_indication = 0x10000;
	197
	198	if (drive->atapi_flags & IDE_AFLAG_SRFP) {
07bd3f47 LT	199	ide_create_request_sense_cmd(drive, pc);
07bd3f47 LT	200	if (ide_queue_pc_tail(drive, floppy->disk, pc))
0127854d BZ	201	return -EIO;
	202
	203	if (floppy->sense_key == 2 &&
	204	floppy->asc == 4 &&
	205	floppy->ascq == 4)
	206	progress_indication = floppy->progress_indication;
	207
	208	/* Else assume format_unit has finished, and we're at 0x10000 */
	209	} else {
	210	ide_hwif_t *hwif = drive->hwif;
	211	unsigned long flags;
	212	u8 stat;
	213
	214	local_irq_save(flags);
	215	stat = hwif->tp_ops->read_status(hwif);
	216	local_irq_restore(flags);
	217
	218	progress_indication = ((stat & ATA_DSC) == 0) ? 0 : 0x10000;
	219	}
	220
	221	if (put_user(progress_indication, arg))
	222	return -EFAULT;
	223
	224	return 0;
	225	}
	226
5bb1536a BZ	227	static int ide_floppy_lockdoor(ide_drive_t drive, struct ide_atapi_pc pc,
	228	unsigned long arg, unsigned int cmd)
	229	{
0df96277	230	struct ide_disk_obj *floppy = drive->driver_data;
5bb1536a BZ	231	struct gendisk *disk = floppy->disk;
	232	int prevent = (arg && cmd != CDROMEJECT) ? 1 : 0;
	233
	234	if (floppy->openers > 1)
	235	return -EBUSY;
	236
	237	ide_set_media_lock(drive, disk, prevent);
	238
	239	if (cmd == CDROMEJECT)
	240	ide_do_start_stop(drive, disk, 2);
	241
	242	return 0;
	243	}
	244
07bd3f47 LT	245	static int ide_floppy_format_ioctl(ide_drive_t drive, struct ide_atapi_pc pc,
	246	fmode_t mode, unsigned int cmd,
	247	void __user *argp)
0127854d BZ	248	{
	249	switch (cmd) {
	250	case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
	251	return 0;
	252	case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
07bd3f47	253	return ide_floppy_get_format_capacities(drive, pc, argp);
0127854d	254	case IDEFLOPPY_IOCTL_FORMAT_START:
badf8082	255	if (!(mode & FMODE_WRITE))
0127854d	256	return -EPERM;
07bd3f47	257	return ide_floppy_format_unit(drive, pc, (int __user *)argp);
0127854d	258	case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
07bd3f47	259	return ide_floppy_get_format_progress(drive, pc, argp);
0127854d BZ	260	default:
	261	return -ENOTTY;
	262	}
	263	}
5bb1536a	264
badf8082 AV	265	int ide_floppy_ioctl(ide_drive_t drive, struct block_device bdev,
badf8082 AV	266	fmode_t mode, unsigned int cmd, unsigned long arg)
5bb1536a	267	{
5bb1536a BZ	268	struct ide_atapi_pc pc;
	269	void __user argp = (void __user )arg;
	270	int err;
	271
	272	if (cmd == CDROMEJECT \|\| cmd == CDROM_LOCKDOOR)
	273	return ide_floppy_lockdoor(drive, &pc, arg, cmd);
	274
07bd3f47	275	err = ide_floppy_format_ioctl(drive, &pc, mode, cmd, argp);
5bb1536a BZ	276	if (err != -ENOTTY)
	277	return err;
	278
	279	/*
	280	* skip SCSI_IOCTL_SEND_COMMAND (deprecated)
	281	* and CDROM_SEND_PACKET (legacy) ioctls
	282	*/
	283	if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
74f3c8af	284	err = scsi_cmd_ioctl(bdev->bd_disk->queue, bdev->bd_disk,
badf8082	285	mode, cmd, argp);
5bb1536a BZ	286
5bb1536a BZ	287	if (err == -ENOTTY)
1bddd9e6	288	err = generic_ide_ioctl(drive, bdev, cmd, arg);
5bb1536a BZ	289
	290	return err;
	291	}