From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/drivers/ide/ide-floppy_ioctl.c | 303 ++++++++++++++++++++++++++++++++++ 1 file changed, 303 insertions(+) create mode 100644 kernel/drivers/ide/ide-floppy_ioctl.c (limited to 'kernel/drivers/ide/ide-floppy_ioctl.c') diff --git a/kernel/drivers/ide/ide-floppy_ioctl.c b/kernel/drivers/ide/ide-floppy_ioctl.c new file mode 100644 index 000000000..a22ca8467 --- /dev/null +++ b/kernel/drivers/ide/ide-floppy_ioctl.c @@ -0,0 +1,303 @@ +/* + * ide-floppy IOCTLs handling. + */ + +#include +#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 DEFINE_MUTEX(ide_floppy_ioctl_mutex); +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; + + mutex_lock(&ide_floppy_ioctl_mutex); + if (cmd == CDROMEJECT || cmd == CDROM_LOCKDOOR) { + err = ide_floppy_lockdoor(drive, &pc, arg, cmd); + goto out; + } + + err = ide_floppy_format_ioctl(drive, &pc, mode, cmd, argp); + if (err != -ENOTTY) + goto out; + + /* + * 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_blk_ioctl(bdev, mode, cmd, argp); + + if (err == -ENOTTY) + err = generic_ide_ioctl(drive, bdev, cmd, arg); + +out: + mutex_unlock(&ide_floppy_ioctl_mutex); + return err; +} -- cgit 1.2.3-korg