From 0127854d7c96612a454bed6de242e28f8021fa7f Mon Sep 17 00:00:00 2001 From: Bartlomiej Zolnierkiewicz Date: Fri, 10 Oct 2008 22:39:38 +0200 Subject: ide-floppy: move floppy ioctls handling to ide-floppy_ioctl.c While at it: - idefloppy_create_read_capacity_cmd() -> ide_floppy_create_read_capacity_cmd() - idefloppy_create_mode_sense_cmd() -> ide_floppy_create_mode_sense_cmd() - idefloppy_create_request_sense_cmd() -> ide_floppy_create_request_sense_cmd() - idefloppy_create_format_unit_cmd() -> ide_floppy_create_format_unit_cmd() - idefloppy_get_sfrp_bit() -> ide_floppy_get_sfrp_bit() Acked-by: Borislav Petkov Signed-off-by: Bartlomiej Zolnierkiewicz --- drivers/ide/ide-floppy_ioctl.c | 243 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 243 insertions(+) create mode 100644 drivers/ide/ide-floppy_ioctl.c (limited to 'drivers/ide/ide-floppy_ioctl.c') diff --git a/drivers/ide/ide-floppy_ioctl.c b/drivers/ide/ide-floppy_ioctl.c new file mode 100644 index 00000000000..5ffc4512d14 --- /dev/null +++ b/drivers/ide/ide-floppy_ioctl.c @@ -0,0 +1,243 @@ +/* + * ide-floppy IOCTLs handling. + */ + +#include +#include +#include + +#include + +#include + +#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, int __user *arg) +{ + struct ide_floppy_obj *floppy = drive->driver_data; + struct ide_atapi_pc pc; + 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) +{ + idefloppy_floppy_t *floppy = drive->driver_data; + struct ide_atapi_pc pc; + + 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, int __user *arg) +{ + idefloppy_floppy_t *floppy = drive->driver_data; + struct ide_atapi_pc pc; + int blocks, length, flags, err = 0; + + if (floppy->openers > 1) { + /* Don't format if someone is using the disk */ + drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS; + return -EBUSY; + } + + drive->atapi_flags |= IDE_AFLAG_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; + } + + (void)ide_floppy_get_sfrp_bit(drive); + 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->atapi_flags &= ~IDE_AFLAG_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, int __user *arg) +{ + idefloppy_floppy_t *floppy = drive->driver_data; + struct ide_atapi_pc pc; + int progress_indication = 0x10000; + + if (drive->atapi_flags & IDE_AFLAG_SRFP) { + ide_floppy_create_request_sense_cmd(&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; +} + +int ide_floppy_format_ioctl(ide_drive_t *drive, struct file *file, + 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, argp); + case IDEFLOPPY_IOCTL_FORMAT_START: + if (!(file->f_mode & 2)) + return -EPERM; + return ide_floppy_format_unit(drive, (int __user *)argp); + case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS: + return ide_floppy_get_format_progress(drive, argp); + default: + return -ENOTTY; + } +} -- cgit v1.2.3