[linux-block.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;
	int i, blocks, length, u_array_size, u_index;
	int __user *argp;
	u8 pc_buf[256], header_len, desc_cnt;

	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, pc_buf, pc->req_xfer)) {
		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,
					      u8 *buf, int b, int l,
					      int flags)
{
	ide_init_pc(pc);
	pc->c[0] = GPCMD_FORMAT_UNIT;
	pc->c[1] = 0x17;

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

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

	put_unaligned(cpu_to_be32(b), (unsigned int *)(&buf[4]));
	put_unaligned(cpu_to_be32(l), (unsigned int *)(&buf[8]));
	pc->req_xfer = 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;
	u8 buf[20];

	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, buf, pc->req_xfer))
		return 1;

	if (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;
	u8 buf[12];
	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, buf, blocks, length, flags);

	if (ide_queue_pc_tail(drive, floppy->disk, pc, buf, pc->req_xfer))
		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;
	u8 sense_buf[18];
	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, sense_buf,
				      pc->req_xfer))
			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	int i, blocks, length, u_array_size, u_index;
0127854d BZ	40	int __user *argp;
41fa9f86	41	u8 pc_buf[256], header_len, desc_cnt;
0127854d BZ	42
	43	if (get_user(u_array_size, arg))
	44	return -EFAULT;
	45
	46	if (u_array_size <= 0)
	47	return -EINVAL;
	48
07bd3f47	49	ide_floppy_create_read_capacity_cmd(pc);
41fa9f86	50
b13345f3	51	if (ide_queue_pc_tail(drive, floppy->disk, pc, pc_buf, pc->req_xfer)) {
0127854d BZ	52	printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
	53	return -EIO;
	54	}
	55
b13345f3	56	header_len = pc_buf[3];
0127854d BZ	57	desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
	58
	59	u_index = 0;
	60	argp = arg + 1;
	61
	62	/*
	63	* We always skip the first capacity descriptor. That's the current
	64	* capacity. We are interested in the remaining descriptors, the
	65	* formattable capacities.
	66	*/
	67	for (i = 1; i < desc_cnt; i++) {
	68	unsigned int desc_start = 4 + i*8;
	69
	70	if (u_index >= u_array_size)
	71	break; /* User-supplied buffer too small */
	72
b13345f3 BP	73	blocks = be32_to_cpup((__be32 *)&pc_buf[desc_start]);
b13345f3 BP	74	length = be16_to_cpup((__be16 *)&pc_buf[desc_start + 6]);
0127854d BZ	75
	76	if (put_user(blocks, argp))
	77	return -EFAULT;
	78
	79	++argp;
	80
	81	if (put_user(length, argp))
	82	return -EFAULT;
	83
	84	++argp;
	85
	86	++u_index;
	87	}
	88
	89	if (put_user(u_index, arg))
	90	return -EFAULT;
	91
	92	return 0;
	93	}
	94
5122e517 BP	95	static void ide_floppy_create_format_unit_cmd(struct ide_atapi_pc *pc,
	96	u8 *buf, int b, int l,
	97	int flags)
0127854d BZ	98	{
	99	ide_init_pc(pc);
	100	pc->c[0] = GPCMD_FORMAT_UNIT;
	101	pc->c[1] = 0x17;
	102
5122e517 BP	103	memset(buf, 0, 12);
5122e517 BP	104	buf[1] = 0xA2;
0127854d BZ	105	/* Default format list header, u8 1: FOV/DCRT/IMM bits set */
	106
	107	if (flags & 1) /* Verify bit on... */
5122e517 BP	108	buf[1] ^= 0x20; /* ... turn off DCRT bit */
5122e517 BP	109	buf[3] = 8;
0127854d	110
5122e517 BP	111	put_unaligned(cpu_to_be32(b), (unsigned int *)(&buf[4]));
	112	put_unaligned(cpu_to_be32(l), (unsigned int *)(&buf[8]));
	113	pc->req_xfer = 12;
0127854d BZ	114	pc->flags \|= PC_FLAG_WRITING;
	115	}
	116
07bd3f47	117	static int ide_floppy_get_sfrp_bit(ide_drive_t drive, struct ide_atapi_pc pc)
0127854d	118	{
0df96277	119	struct ide_disk_obj *floppy = drive->driver_data;
802e6634	120	u8 buf[20];
0127854d BZ	121
	122	drive->atapi_flags &= ~IDE_AFLAG_SRFP;
	123
07bd3f47 LT	124	ide_floppy_create_mode_sense_cmd(pc, IDEFLOPPY_CAPABILITIES_PAGE);
07bd3f47 LT	125	pc->flags \|= PC_FLAG_SUPPRESS_ERROR;
0127854d	126
802e6634	127	if (ide_queue_pc_tail(drive, floppy->disk, pc, buf, pc->req_xfer))
0127854d BZ	128	return 1;
0127854d BZ	129
802e6634	130	if (buf[8 + 2] & 0x40)
0127854d BZ	131	drive->atapi_flags \|= IDE_AFLAG_SRFP;
	132
	133	return 0;
	134	}
	135
07bd3f47 LT	136	static int ide_floppy_format_unit(ide_drive_t drive, struct ide_atapi_pc pc,
07bd3f47 LT	137	int __user *arg)
0127854d	138	{
0df96277	139	struct ide_disk_obj *floppy = drive->driver_data;
5122e517	140	u8 buf[12];
0127854d BZ	141	int blocks, length, flags, err = 0;
	142
	143	if (floppy->openers > 1) {
	144	/* Don't format if someone is using the disk */
e0128628	145	drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS;
0127854d BZ	146	return -EBUSY;
	147	}
	148
e0128628	149	drive->dev_flags \|= IDE_DFLAG_FORMAT_IN_PROGRESS;
0127854d BZ	150
	151	/*
	152	* Send ATAPI_FORMAT_UNIT to the drive.
	153	*
	154	* Userland gives us the following structure:
	155	*
	156	* struct idefloppy_format_command {
	157	* int nblocks;
	158	* int blocksize;
	159	* int flags;
	160	* } ;
	161	*
	162	* flags is a bitmask, currently, the only defined flag is:
	163	*
	164	* 0x01 - verify media after format.
	165	*/
	166	if (get_user(blocks, arg) \|\|
	167	get_user(length, arg+1) \|\|
	168	get_user(flags, arg+2)) {
	169	err = -EFAULT;
	170	goto out;
	171	}
	172
07bd3f47	173	ide_floppy_get_sfrp_bit(drive, pc);
5122e517	174	ide_floppy_create_format_unit_cmd(pc, buf, blocks, length, flags);
0127854d	175
5122e517	176	if (ide_queue_pc_tail(drive, floppy->disk, pc, buf, pc->req_xfer))
0127854d BZ	177	err = -EIO;
	178
	179	out:
	180	if (err)
e0128628	181	drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS;
0127854d BZ	182	return err;
	183	}
	184
	185	/*
	186	* Get ATAPI_FORMAT_UNIT progress indication.
	187	*
	188	* Userland gives a pointer to an int. The int is set to a progress
	189	* indicator 0-65536, with 65536=100%.
	190	*
	191	* If the drive does not support format progress indication, we just check
	192	* the dsc bit, and return either 0 or 65536.
	193	*/
	194
07bd3f47 LT	195	static int ide_floppy_get_format_progress(ide_drive_t *drive,
	196	struct ide_atapi_pc *pc,
	197	int __user *arg)
0127854d	198	{
0df96277	199	struct ide_disk_obj *floppy = drive->driver_data;
60cfab85	200	u8 sense_buf[18];
0127854d BZ	201	int progress_indication = 0x10000;
	202
	203	if (drive->atapi_flags & IDE_AFLAG_SRFP) {
07bd3f47	204	ide_create_request_sense_cmd(drive, pc);
60cfab85	205	if (ide_queue_pc_tail(drive, floppy->disk, pc, sense_buf,
b13345f3	206	pc->req_xfer))
0127854d BZ	207	return -EIO;
	208
	209	if (floppy->sense_key == 2 &&
	210	floppy->asc == 4 &&
	211	floppy->ascq == 4)
	212	progress_indication = floppy->progress_indication;
	213
	214	/* Else assume format_unit has finished, and we're at 0x10000 */
	215	} else {
	216	ide_hwif_t *hwif = drive->hwif;
	217	unsigned long flags;
	218	u8 stat;
	219
	220	local_irq_save(flags);
	221	stat = hwif->tp_ops->read_status(hwif);
	222	local_irq_restore(flags);
	223
	224	progress_indication = ((stat & ATA_DSC) == 0) ? 0 : 0x10000;
	225	}
	226
	227	if (put_user(progress_indication, arg))
	228	return -EFAULT;
	229
	230	return 0;
	231	}
	232
5bb1536a BZ	233	static int ide_floppy_lockdoor(ide_drive_t drive, struct ide_atapi_pc pc,
	234	unsigned long arg, unsigned int cmd)
	235	{
0df96277	236	struct ide_disk_obj *floppy = drive->driver_data;
5bb1536a BZ	237	struct gendisk *disk = floppy->disk;
	238	int prevent = (arg && cmd != CDROMEJECT) ? 1 : 0;
	239
	240	if (floppy->openers > 1)
	241	return -EBUSY;
	242
	243	ide_set_media_lock(drive, disk, prevent);
	244
	245	if (cmd == CDROMEJECT)
	246	ide_do_start_stop(drive, disk, 2);
	247
	248	return 0;
	249	}
	250
07bd3f47 LT	251	static int ide_floppy_format_ioctl(ide_drive_t drive, struct ide_atapi_pc pc,
	252	fmode_t mode, unsigned int cmd,
	253	void __user *argp)
0127854d BZ	254	{
	255	switch (cmd) {
	256	case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
	257	return 0;
	258	case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
07bd3f47	259	return ide_floppy_get_format_capacities(drive, pc, argp);
0127854d	260	case IDEFLOPPY_IOCTL_FORMAT_START:
badf8082	261	if (!(mode & FMODE_WRITE))
0127854d	262	return -EPERM;
07bd3f47	263	return ide_floppy_format_unit(drive, pc, (int __user *)argp);
0127854d	264	case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
07bd3f47	265	return ide_floppy_get_format_progress(drive, pc, argp);
0127854d BZ	266	default:
	267	return -ENOTTY;
	268	}
	269	}
5bb1536a	270
badf8082 AV	271	int ide_floppy_ioctl(ide_drive_t drive, struct block_device bdev,
badf8082 AV	272	fmode_t mode, unsigned int cmd, unsigned long arg)
5bb1536a	273	{
5bb1536a BZ	274	struct ide_atapi_pc pc;
	275	void __user argp = (void __user )arg;
	276	int err;
	277
	278	if (cmd == CDROMEJECT \|\| cmd == CDROM_LOCKDOOR)
	279	return ide_floppy_lockdoor(drive, &pc, arg, cmd);
	280
07bd3f47	281	err = ide_floppy_format_ioctl(drive, &pc, mode, cmd, argp);
5bb1536a BZ	282	if (err != -ENOTTY)
	283	return err;
	284
	285	/*
	286	* skip SCSI_IOCTL_SEND_COMMAND (deprecated)
	287	* and CDROM_SEND_PACKET (legacy) ioctls
	288	*/
	289	if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
74f3c8af	290	err = scsi_cmd_ioctl(bdev->bd_disk->queue, bdev->bd_disk,
badf8082	291	mode, cmd, argp);
5bb1536a BZ	292
5bb1536a BZ	293	if (err == -ENOTTY)
1bddd9e6	294	err = generic_ide_ioctl(drive, bdev, cmd, arg);
5bb1536a BZ	295
	296	return err;
	297	}