drivers/ide/ide-ioctls.c - kernel/msm-5.4 - Gitiles

 /*
  * IDE ioctls handling.
  */

 #include <linux/hdreg.h>
 #include <linux/ide.h>

 static const struct ide_ioctl_devset ide_ioctl_settings[] = {
 { HDIO_GET_32BIT,	 HDIO_SET_32BIT,	&ide_devset_io_32bit  },
 { HDIO_GET_KEEPSETTINGS, HDIO_SET_KEEPSETTINGS,	&ide_devset_keepsettings },
 { HDIO_GET_UNMASKINTR,	 HDIO_SET_UNMASKINTR,	&ide_devset_unmaskirq },
 { HDIO_GET_DMA,		 HDIO_SET_DMA,		&ide_devset_using_dma },
 { -1,			 HDIO_SET_PIO_MODE,	&ide_devset_pio_mode  },
 { 0 }
 };

 int ide_setting_ioctl(ide_drive_t *drive, struct block_device *bdev,
 		      unsigned int cmd, unsigned long arg,
 		      const struct ide_ioctl_devset *s)
 {
 	const struct ide_devset *ds;
 	int err = -EOPNOTSUPP;

 	for (; (ds = s->setting); s++) {
 		if (ds->get && s->get_ioctl == cmd)
 			goto read_val;
 		else if (ds->set && s->set_ioctl == cmd)
 			goto set_val;
 	}

 	return err;

 read_val:
 	mutex_lock(&ide_setting_mtx);
 	err = ds->get(drive);
 	mutex_unlock(&ide_setting_mtx);
 	return err >= 0 ? put_user(err, (long __user *)arg) : err;

 set_val:
 	if (bdev != bdev->bd_contains)
 		err = -EINVAL;
 	else {
 		if (!capable(CAP_SYS_ADMIN))
 			err = -EACCES;
 		else {
 			mutex_lock(&ide_setting_mtx);
 			err = ide_devset_execute(drive, ds, arg);
 			mutex_unlock(&ide_setting_mtx);
 		}
 	}
 	return err;
 }
 EXPORT_SYMBOL_GPL(ide_setting_ioctl);

 static int ide_get_identity_ioctl(ide_drive_t *drive, unsigned int cmd,
 				  unsigned long arg)
 {
 	u16 *id = NULL;
 	int size = (cmd == HDIO_GET_IDENTITY) ? (ATA_ID_WORDS * 2) : 142;
 	int rc = 0;

 	if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) {
 		rc = -ENOMSG;
 		goto out;
 	}

 	id = kmalloc(size, GFP_KERNEL);
 	if (id == NULL) {
 		rc = -ENOMEM;
 		goto out;
 	}

 	memcpy(id, drive->id, size);
 	ata_id_to_hd_driveid(id);

 	if (copy_to_user((void __user *)arg, id, size))
 		rc = -EFAULT;

 	kfree(id);
 out:
 	return rc;
 }

 static int ide_get_nice_ioctl(ide_drive_t *drive, unsigned long arg)
 {
 	return put_user((!!(drive->dev_flags & IDE_DFLAG_DSC_OVERLAP)
 			 << IDE_NICE_DSC_OVERLAP) |
 			(!!(drive->dev_flags & IDE_DFLAG_NICE1)
 			 << IDE_NICE_1), (long __user *)arg);
 }

 static int ide_set_nice_ioctl(ide_drive_t *drive, unsigned long arg)
 {
 	if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
 		return -EPERM;

 	if (((arg >> IDE_NICE_DSC_OVERLAP) & 1) &&
 	    (drive->media != ide_tape ||
 	     (drive->dev_flags & IDE_DFLAG_SCSI)))
 		return -EPERM;

 	if ((arg >> IDE_NICE_DSC_OVERLAP) & 1)
 		drive->dev_flags |= IDE_DFLAG_DSC_OVERLAP;
 	else
 		drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP;

 	if ((arg >> IDE_NICE_1) & 1)
 		drive->dev_flags |= IDE_DFLAG_NICE1;
 	else
 		drive->dev_flags &= ~IDE_DFLAG_NICE1;

 	return 0;
 }

 static int ide_cmd_ioctl(ide_drive_t *drive, unsigned cmd, unsigned long arg)
 {
 	u8 *buf = NULL;
 	int bufsize = 0, err = 0;
 	u8 args[4], xfer_rate = 0;
 	ide_task_t tfargs;
 	struct ide_taskfile *tf = &tfargs.tf;
 	u16 *id = drive->id;

 	if (NULL == (void *) arg) {
 		struct request *rq;

 		rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 		rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
 		err = blk_execute_rq(drive->queue, NULL, rq, 0);
 		blk_put_request(rq);

 		return err;
 	}

 	if (copy_from_user(args, (void __user *)arg, 4))
 		return -EFAULT;

 	memset(&tfargs, 0, sizeof(ide_task_t));
 	tf->feature = args[2];
 	if (args[0] == ATA_CMD_SMART) {
 		tf->nsect = args[3];
 		tf->lbal  = args[1];
 		tf->lbam  = 0x4f;
 		tf->lbah  = 0xc2;
 		tfargs.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_IN_NSECT;
 	} else {
 		tf->nsect = args[1];
 		tfargs.tf_flags = IDE_TFLAG_OUT_FEATURE |
 				  IDE_TFLAG_OUT_NSECT | IDE_TFLAG_IN_NSECT;
 	}
 	tf->command = args[0];
 	tfargs.data_phase = args[3] ? TASKFILE_IN : TASKFILE_NO_DATA;

 	if (args[3]) {
 		tfargs.tf_flags |= IDE_TFLAG_IO_16BIT;
 		bufsize = SECTOR_SIZE * args[3];
 		buf = kzalloc(bufsize, GFP_KERNEL);
 		if (buf == NULL)
 			return -ENOMEM;
 	}

 	if (tf->command == ATA_CMD_SET_FEATURES &&
 	    tf->feature == SETFEATURES_XFER &&
 	    tf->nsect >= XFER_SW_DMA_0 &&
 	    (id[ATA_ID_UDMA_MODES] ||
 	     id[ATA_ID_MWDMA_MODES] ||
 	     id[ATA_ID_SWDMA_MODES])) {
 		xfer_rate = args[1];
 		if (tf->nsect > XFER_UDMA_2 && !eighty_ninty_three(drive)) {
 			printk(KERN_WARNING "%s: UDMA speeds >UDMA33 cannot "
 					    "be set\n", drive->name);
 			goto abort;
 		}
 	}

 	err = ide_raw_taskfile(drive, &tfargs, buf, args[3]);

 	args[0] = tf->status;
 	args[1] = tf->error;
 	args[2] = tf->nsect;

 	if (!err && xfer_rate) {
 		/* active-retuning-calls future */
 		ide_set_xfer_rate(drive, xfer_rate);
 		ide_driveid_update(drive);
 	}
 abort:
 	if (copy_to_user((void __user *)arg, &args, 4))
 		err = -EFAULT;
 	if (buf) {
 		if (copy_to_user((void __user *)(arg + 4), buf, bufsize))
 			err = -EFAULT;
 		kfree(buf);
 	}
 	return err;
 }

 static int ide_task_ioctl(ide_drive_t *drive, unsigned cmd, unsigned long arg)
 {
 	void __user *p = (void __user *)arg;
 	int err = 0;
 	u8 args[7];
 	ide_task_t task;

 	if (copy_from_user(args, p, 7))
 		return -EFAULT;

 	memset(&task, 0, sizeof(task));
 	memcpy(&task.tf_array[7], &args[1], 6);
 	task.tf.command = args[0];
 	task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;

 	err = ide_no_data_taskfile(drive, &task);

 	args[0] = task.tf.command;
 	memcpy(&args[1], &task.tf_array[7], 6);

 	if (copy_to_user(p, args, 7))
 		err = -EFAULT;

 	return err;
 }

 static int generic_drive_reset(ide_drive_t *drive)
 {
 	struct request *rq;
 	int ret = 0;

 	rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 	rq->cmd_type = REQ_TYPE_SPECIAL;
 	rq->cmd_len = 1;
 	rq->cmd[0] = REQ_DRIVE_RESET;
 	rq->cmd_flags |= REQ_SOFTBARRIER;
 	if (blk_execute_rq(drive->queue, NULL, rq, 1))
 		ret = rq->errors;
 	blk_put_request(rq);
 	return ret;
 }

 int generic_ide_ioctl(ide_drive_t *drive, struct block_device *bdev,
 		      unsigned int cmd, unsigned long arg)
 {
 	int err;

 	err = ide_setting_ioctl(drive, bdev, cmd, arg, ide_ioctl_settings);
 	if (err != -EOPNOTSUPP)
 		return err;

 	switch (cmd) {
 	case HDIO_OBSOLETE_IDENTITY:
 	case HDIO_GET_IDENTITY:
 		if (bdev != bdev->bd_contains)
 			return -EINVAL;
 		return ide_get_identity_ioctl(drive, cmd, arg);
 	case HDIO_GET_NICE:
 		return ide_get_nice_ioctl(drive, arg);
 	case HDIO_SET_NICE:
 		if (!capable(CAP_SYS_ADMIN))
 			return -EACCES;
 		return ide_set_nice_ioctl(drive, arg);
 #ifdef CONFIG_IDE_TASK_IOCTL
 	case HDIO_DRIVE_TASKFILE:
 		if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
 			return -EACCES;
 		if (drive->media == ide_disk)
 			return ide_taskfile_ioctl(drive, cmd, arg);
 		return -ENOMSG;
 #endif
 	case HDIO_DRIVE_CMD:
 		if (!capable(CAP_SYS_RAWIO))
 			return -EACCES;
 		return ide_cmd_ioctl(drive, cmd, arg);
 	case HDIO_DRIVE_TASK:
 		if (!capable(CAP_SYS_RAWIO))
 			return -EACCES;
 		return ide_task_ioctl(drive, cmd, arg);
 	case HDIO_DRIVE_RESET:
 		if (!capable(CAP_SYS_ADMIN))
 			return -EACCES;
 		return generic_drive_reset(drive);
 	case HDIO_GET_BUSSTATE:
 		if (!capable(CAP_SYS_ADMIN))
 			return -EACCES;
 		if (put_user(BUSSTATE_ON, (long __user *)arg))
 			return -EFAULT;
 		return 0;
 	case HDIO_SET_BUSSTATE:
 		if (!capable(CAP_SYS_ADMIN))
 			return -EACCES;
 		return -EOPNOTSUPP;
 	default:
 		return -EINVAL;
 	}
 }
 EXPORT_SYMBOL(generic_ide_ioctl);
	/*
	* IDE ioctls handling.
	*/

	#include <linux/hdreg.h>
	#include <linux/ide.h>

	static const struct ide_ioctl_devset ide_ioctl_settings[] = {
	{ HDIO_GET_32BIT, HDIO_SET_32BIT, &ide_devset_io_32bit },
	{ HDIO_GET_KEEPSETTINGS, HDIO_SET_KEEPSETTINGS, &ide_devset_keepsettings },
	{ HDIO_GET_UNMASKINTR, HDIO_SET_UNMASKINTR, &ide_devset_unmaskirq },
	{ HDIO_GET_DMA, HDIO_SET_DMA, &ide_devset_using_dma },
	{ -1, HDIO_SET_PIO_MODE, &ide_devset_pio_mode },
	{ 0 }
	};

	int ide_setting_ioctl(ide_drive_t drive, struct block_device bdev,
	unsigned int cmd, unsigned long arg,
	const struct ide_ioctl_devset *s)
	{
	const struct ide_devset *ds;
	int err = -EOPNOTSUPP;

	for (; (ds = s->setting); s++) {
	if (ds->get && s->get_ioctl == cmd)
	goto read_val;
	else if (ds->set && s->set_ioctl == cmd)
	goto set_val;
	}

	return err;

	read_val:
	mutex_lock(&ide_setting_mtx);
	err = ds->get(drive);
	mutex_unlock(&ide_setting_mtx);
	return err >= 0 ? put_user(err, (long __user *)arg) : err;

	set_val:
	if (bdev != bdev->bd_contains)
	err = -EINVAL;
	else {
	if (!capable(CAP_SYS_ADMIN))
	err = -EACCES;
	else {
	mutex_lock(&ide_setting_mtx);
	err = ide_devset_execute(drive, ds, arg);
	mutex_unlock(&ide_setting_mtx);
	}
	}
	return err;
	}
	EXPORT_SYMBOL_GPL(ide_setting_ioctl);

	static int ide_get_identity_ioctl(ide_drive_t *drive, unsigned int cmd,
	unsigned long arg)
	{
	u16 *id = NULL;
	int size = (cmd == HDIO_GET_IDENTITY) ? (ATA_ID_WORDS * 2) : 142;
	int rc = 0;

	if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) {
	rc = -ENOMSG;
	goto out;
	}

	id = kmalloc(size, GFP_KERNEL);
	if (id == NULL) {
	rc = -ENOMEM;
	goto out;
	}

	memcpy(id, drive->id, size);
	ata_id_to_hd_driveid(id);

	if (copy_to_user((void __user *)arg, id, size))
	rc = -EFAULT;

	kfree(id);
	out:
	return rc;
	}

	static int ide_get_nice_ioctl(ide_drive_t *drive, unsigned long arg)
	{
	return put_user((!!(drive->dev_flags & IDE_DFLAG_DSC_OVERLAP)
	<< IDE_NICE_DSC_OVERLAP) \|
	(!!(drive->dev_flags & IDE_DFLAG_NICE1)
	<< IDE_NICE_1), (long __user *)arg);
	}

	static int ide_set_nice_ioctl(ide_drive_t *drive, unsigned long arg)
	{
	if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) \| (1 << IDE_NICE_1))))
	return -EPERM;

	if (((arg >> IDE_NICE_DSC_OVERLAP) & 1) &&
	(drive->media != ide_tape \|\|
	(drive->dev_flags & IDE_DFLAG_SCSI)))
	return -EPERM;

	if ((arg >> IDE_NICE_DSC_OVERLAP) & 1)
	drive->dev_flags \|= IDE_DFLAG_DSC_OVERLAP;
	else
	drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP;

	if ((arg >> IDE_NICE_1) & 1)
	drive->dev_flags \|= IDE_DFLAG_NICE1;
	else
	drive->dev_flags &= ~IDE_DFLAG_NICE1;

	return 0;
	}

	static int ide_cmd_ioctl(ide_drive_t *drive, unsigned cmd, unsigned long arg)
	{
	u8 *buf = NULL;
	int bufsize = 0, err = 0;
	u8 args[4], xfer_rate = 0;
	ide_task_t tfargs;
	struct ide_taskfile *tf = &tfargs.tf;
	u16 *id = drive->id;

	if (NULL == (void *) arg) {
	struct request *rq;

	rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
	rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
	err = blk_execute_rq(drive->queue, NULL, rq, 0);
	blk_put_request(rq);

	return err;
	}

	if (copy_from_user(args, (void __user *)arg, 4))
	return -EFAULT;

	memset(&tfargs, 0, sizeof(ide_task_t));
	tf->feature = args[2];
	if (args[0] == ATA_CMD_SMART) {
	tf->nsect = args[3];
	tf->lbal = args[1];
	tf->lbam = 0x4f;
	tf->lbah = 0xc2;
	tfargs.tf_flags = IDE_TFLAG_OUT_TF \| IDE_TFLAG_IN_NSECT;
	} else {
	tf->nsect = args[1];
	tfargs.tf_flags = IDE_TFLAG_OUT_FEATURE \|
	IDE_TFLAG_OUT_NSECT \| IDE_TFLAG_IN_NSECT;
	}
	tf->command = args[0];
	tfargs.data_phase = args[3] ? TASKFILE_IN : TASKFILE_NO_DATA;

	if (args[3]) {
	tfargs.tf_flags \|= IDE_TFLAG_IO_16BIT;
	bufsize = SECTOR_SIZE * args[3];
	buf = kzalloc(bufsize, GFP_KERNEL);
	if (buf == NULL)
	return -ENOMEM;
	}

	if (tf->command == ATA_CMD_SET_FEATURES &&
	tf->feature == SETFEATURES_XFER &&
	tf->nsect >= XFER_SW_DMA_0 &&
	(id[ATA_ID_UDMA_MODES] \|\|
	id[ATA_ID_MWDMA_MODES] \|\|
	id[ATA_ID_SWDMA_MODES])) {
	xfer_rate = args[1];
	if (tf->nsect > XFER_UDMA_2 && !eighty_ninty_three(drive)) {
	printk(KERN_WARNING "%s: UDMA speeds >UDMA33 cannot "
	"be set\n", drive->name);
	goto abort;
	}
	}

	err = ide_raw_taskfile(drive, &tfargs, buf, args[3]);

	args[0] = tf->status;
	args[1] = tf->error;
	args[2] = tf->nsect;

	if (!err && xfer_rate) {
	/* active-retuning-calls future */
	ide_set_xfer_rate(drive, xfer_rate);
	ide_driveid_update(drive);
	}
	abort:
	if (copy_to_user((void __user *)arg, &args, 4))
	err = -EFAULT;
	if (buf) {
	if (copy_to_user((void __user *)(arg + 4), buf, bufsize))
	err = -EFAULT;
	kfree(buf);
	}
	return err;
	}

	static int ide_task_ioctl(ide_drive_t *drive, unsigned cmd, unsigned long arg)
	{
	void __user p = (void __user )arg;
	int err = 0;
	u8 args[7];
	ide_task_t task;

	if (copy_from_user(args, p, 7))
	return -EFAULT;

	memset(&task, 0, sizeof(task));
	memcpy(&task.tf_array[7], &args[1], 6);
	task.tf.command = args[0];
	task.tf_flags = IDE_TFLAG_TF \| IDE_TFLAG_DEVICE;

	err = ide_no_data_taskfile(drive, &task);

	args[0] = task.tf.command;
	memcpy(&args[1], &task.tf_array[7], 6);

	if (copy_to_user(p, args, 7))
	err = -EFAULT;

	return err;
	}

	static int generic_drive_reset(ide_drive_t *drive)
	{
	struct request *rq;
	int ret = 0;

	rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
	rq->cmd_type = REQ_TYPE_SPECIAL;
	rq->cmd_len = 1;
	rq->cmd[0] = REQ_DRIVE_RESET;
	rq->cmd_flags \|= REQ_SOFTBARRIER;
	if (blk_execute_rq(drive->queue, NULL, rq, 1))
	ret = rq->errors;
	blk_put_request(rq);
	return ret;
	}

	int generic_ide_ioctl(ide_drive_t drive, struct block_device bdev,
	unsigned int cmd, unsigned long arg)
	{
	int err;

	err = ide_setting_ioctl(drive, bdev, cmd, arg, ide_ioctl_settings);
	if (err != -EOPNOTSUPP)
	return err;

	switch (cmd) {
	case HDIO_OBSOLETE_IDENTITY:
	case HDIO_GET_IDENTITY:
	if (bdev != bdev->bd_contains)
	return -EINVAL;
	return ide_get_identity_ioctl(drive, cmd, arg);
	case HDIO_GET_NICE:
	return ide_get_nice_ioctl(drive, arg);
	case HDIO_SET_NICE:
	if (!capable(CAP_SYS_ADMIN))
	return -EACCES;
	return ide_set_nice_ioctl(drive, arg);
	#ifdef CONFIG_IDE_TASK_IOCTL
	case HDIO_DRIVE_TASKFILE:
	if (!capable(CAP_SYS_ADMIN) \|\| !capable(CAP_SYS_RAWIO))
	return -EACCES;
	if (drive->media == ide_disk)
	return ide_taskfile_ioctl(drive, cmd, arg);
	return -ENOMSG;
	#endif
	case HDIO_DRIVE_CMD:
	if (!capable(CAP_SYS_RAWIO))
	return -EACCES;
	return ide_cmd_ioctl(drive, cmd, arg);
	case HDIO_DRIVE_TASK:
	if (!capable(CAP_SYS_RAWIO))
	return -EACCES;
	return ide_task_ioctl(drive, cmd, arg);
	case HDIO_DRIVE_RESET:
	if (!capable(CAP_SYS_ADMIN))
	return -EACCES;
	return generic_drive_reset(drive);
	case HDIO_GET_BUSSTATE:
	if (!capable(CAP_SYS_ADMIN))
	return -EACCES;
	if (put_user(BUSSTATE_ON, (long __user *)arg))
	return -EFAULT;
	return 0;
	case HDIO_SET_BUSSTATE:
	if (!capable(CAP_SYS_ADMIN))
	return -EACCES;
	return -EOPNOTSUPP;
	default:
	return -EINVAL;
	}
	}
	EXPORT_SYMBOL(generic_ide_ioctl);