1/* 2 * ide-floppy IOCTLs handling. 3 */ 4 5#include <linux/kernel.h> 6#include <linux/ide.h> 7#include <linux/cdrom.h> 8#include <linux/mutex.h> 9 10#include <asm/unaligned.h> 11 12#include <scsi/scsi_ioctl.h> 13 14#include "ide-floppy.h" 15 16/* 17 * Obtain the list of formattable capacities. 18 * Very similar to ide_floppy_get_capacity, except that we push the capacity 19 * descriptors to userland, instead of our own structures. 20 * 21 * Userland gives us the following structure: 22 * 23 * struct idefloppy_format_capacities { 24 * int nformats; 25 * struct { 26 * int nblocks; 27 * int blocksize; 28 * } formats[]; 29 * }; 30 * 31 * userland initializes nformats to the number of allocated formats[] records. 32 * On exit we set nformats to the number of records we've actually initialized. 33 */ 34 35static DEFINE_MUTEX(ide_floppy_ioctl_mutex); 36static int ide_floppy_get_format_capacities(ide_drive_t *drive, 37 struct ide_atapi_pc *pc, 38 int __user *arg) 39{ 40 struct ide_disk_obj *floppy = drive->driver_data; 41 int i, blocks, length, u_array_size, u_index; 42 int __user *argp; 43 u8 pc_buf[256], header_len, desc_cnt; 44 45 if (get_user(u_array_size, arg)) 46 return -EFAULT; 47 48 if (u_array_size <= 0) 49 return -EINVAL; 50 51 ide_floppy_create_read_capacity_cmd(pc); 52 53 if (ide_queue_pc_tail(drive, floppy->disk, pc, pc_buf, pc->req_xfer)) { 54 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n"); 55 return -EIO; 56 } 57 58 header_len = pc_buf[3]; 59 desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */ 60 61 u_index = 0; 62 argp = arg + 1; 63 64 /* 65 * We always skip the first capacity descriptor. That's the current 66 * capacity. We are interested in the remaining descriptors, the 67 * formattable capacities. 68 */ 69 for (i = 1; i < desc_cnt; i++) { 70 unsigned int desc_start = 4 + i*8; 71 72 if (u_index >= u_array_size) 73 break; /* User-supplied buffer too small */ 74 75 blocks = be32_to_cpup((__be32 *)&pc_buf[desc_start]); 76 length = be16_to_cpup((__be16 *)&pc_buf[desc_start + 6]); 77 78 if (put_user(blocks, argp)) 79 return -EFAULT; 80 81 ++argp; 82 83 if (put_user(length, argp)) 84 return -EFAULT; 85 86 ++argp; 87 88 ++u_index; 89 } 90 91 if (put_user(u_index, arg)) 92 return -EFAULT; 93 94 return 0; 95} 96 97static void ide_floppy_create_format_unit_cmd(struct ide_atapi_pc *pc, 98 u8 *buf, int b, int l, 99 int flags) 100{ 101 ide_init_pc(pc); 102 pc->c[0] = GPCMD_FORMAT_UNIT; 103 pc->c[1] = 0x17; 104 105 memset(buf, 0, 12); 106 buf[1] = 0xA2; 107 /* Default format list header, u8 1: FOV/DCRT/IMM bits set */ 108 109 if (flags & 1) /* Verify bit on... */ 110 buf[1] ^= 0x20; /* ... turn off DCRT bit */ 111 buf[3] = 8; 112 113 put_unaligned(cpu_to_be32(b), (unsigned int *)(&buf[4])); 114 put_unaligned(cpu_to_be32(l), (unsigned int *)(&buf[8])); 115 pc->req_xfer = 12; 116 pc->flags |= PC_FLAG_WRITING; 117} 118 119static int ide_floppy_get_sfrp_bit(ide_drive_t *drive, struct ide_atapi_pc *pc) 120{ 121 struct ide_disk_obj *floppy = drive->driver_data; 122 u8 buf[20]; 123 124 drive->atapi_flags &= ~IDE_AFLAG_SRFP; 125 126 ide_floppy_create_mode_sense_cmd(pc, IDEFLOPPY_CAPABILITIES_PAGE); 127 pc->flags |= PC_FLAG_SUPPRESS_ERROR; 128 129 if (ide_queue_pc_tail(drive, floppy->disk, pc, buf, pc->req_xfer)) 130 return 1; 131 132 if (buf[8 + 2] & 0x40) 133 drive->atapi_flags |= IDE_AFLAG_SRFP; 134 135 return 0; 136} 137 138static int ide_floppy_format_unit(ide_drive_t *drive, struct ide_atapi_pc *pc, 139 int __user *arg) 140{ 141 struct ide_disk_obj *floppy = drive->driver_data; 142 u8 buf[12]; 143 int blocks, length, flags, err = 0; 144 145 if (floppy->openers > 1) { 146 /* Don't format if someone is using the disk */ 147 drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS; 148 return -EBUSY; 149 } 150 151 drive->dev_flags |= IDE_DFLAG_FORMAT_IN_PROGRESS; 152 153 /* 154 * Send ATAPI_FORMAT_UNIT to the drive. 155 * 156 * Userland gives us the following structure: 157 * 158 * struct idefloppy_format_command { 159 * int nblocks; 160 * int blocksize; 161 * int flags; 162 * } ; 163 * 164 * flags is a bitmask, currently, the only defined flag is: 165 * 166 * 0x01 - verify media after format. 167 */ 168 if (get_user(blocks, arg) || 169 get_user(length, arg+1) || 170 get_user(flags, arg+2)) { 171 err = -EFAULT; 172 goto out; 173 } 174 175 ide_floppy_get_sfrp_bit(drive, pc); 176 ide_floppy_create_format_unit_cmd(pc, buf, blocks, length, flags); 177 178 if (ide_queue_pc_tail(drive, floppy->disk, pc, buf, pc->req_xfer)) 179 err = -EIO; 180 181out: 182 if (err) 183 drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS; 184 return err; 185} 186 187/* 188 * Get ATAPI_FORMAT_UNIT progress indication. 189 * 190 * Userland gives a pointer to an int. The int is set to a progress 191 * indicator 0-65536, with 65536=100%. 192 * 193 * If the drive does not support format progress indication, we just check 194 * the dsc bit, and return either 0 or 65536. 195 */ 196 197static int ide_floppy_get_format_progress(ide_drive_t *drive, 198 struct ide_atapi_pc *pc, 199 int __user *arg) 200{ 201 struct ide_disk_obj *floppy = drive->driver_data; 202 u8 sense_buf[18]; 203 int progress_indication = 0x10000; 204 205 if (drive->atapi_flags & IDE_AFLAG_SRFP) { 206 ide_create_request_sense_cmd(drive, pc); 207 if (ide_queue_pc_tail(drive, floppy->disk, pc, sense_buf, 208 pc->req_xfer)) 209 return -EIO; 210 211 if (floppy->sense_key == 2 && 212 floppy->asc == 4 && 213 floppy->ascq == 4) 214 progress_indication = floppy->progress_indication; 215 216 /* Else assume format_unit has finished, and we're at 0x10000 */ 217 } else { 218 ide_hwif_t *hwif = drive->hwif; 219 unsigned long flags; 220 u8 stat; 221 222 local_irq_save(flags); 223 stat = hwif->tp_ops->read_status(hwif); 224 local_irq_restore(flags); 225 226 progress_indication = ((stat & ATA_DSC) == 0) ? 0 : 0x10000; 227 } 228 229 if (put_user(progress_indication, arg)) 230 return -EFAULT; 231 232 return 0; 233} 234 235static int ide_floppy_lockdoor(ide_drive_t *drive, struct ide_atapi_pc *pc, 236 unsigned long arg, unsigned int cmd) 237{ 238 struct ide_disk_obj *floppy = drive->driver_data; 239 struct gendisk *disk = floppy->disk; 240 int prevent = (arg && cmd != CDROMEJECT) ? 1 : 0; 241 242 if (floppy->openers > 1) 243 return -EBUSY; 244 245 ide_set_media_lock(drive, disk, prevent); 246 247 if (cmd == CDROMEJECT) 248 ide_do_start_stop(drive, disk, 2); 249 250 return 0; 251} 252 253static int ide_floppy_format_ioctl(ide_drive_t *drive, struct ide_atapi_pc *pc, 254 fmode_t mode, unsigned int cmd, 255 void __user *argp) 256{ 257 switch (cmd) { 258 case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED: 259 return 0; 260 case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY: 261 return ide_floppy_get_format_capacities(drive, pc, argp); 262 case IDEFLOPPY_IOCTL_FORMAT_START: 263 if (!(mode & FMODE_WRITE)) 264 return -EPERM; 265 return ide_floppy_format_unit(drive, pc, (int __user *)argp); 266 case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS: 267 return ide_floppy_get_format_progress(drive, pc, argp); 268 default: 269 return -ENOTTY; 270 } 271} 272 273int ide_floppy_ioctl(ide_drive_t *drive, struct block_device *bdev, 274 fmode_t mode, unsigned int cmd, unsigned long arg) 275{ 276 struct ide_atapi_pc pc; 277 void __user *argp = (void __user *)arg; 278 int err; 279 280 mutex_lock(&ide_floppy_ioctl_mutex); 281 if (cmd == CDROMEJECT || cmd == CDROM_LOCKDOOR) { 282 err = ide_floppy_lockdoor(drive, &pc, arg, cmd); 283 goto out; 284 } 285 286 err = ide_floppy_format_ioctl(drive, &pc, mode, cmd, argp); 287 if (err != -ENOTTY) 288 goto out; 289 290 /* 291 * skip SCSI_IOCTL_SEND_COMMAND (deprecated) 292 * and CDROM_SEND_PACKET (legacy) ioctls 293 */ 294 if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND) 295 err = scsi_cmd_blk_ioctl(bdev, mode, cmd, argp); 296 297 if (err == -ENOTTY) 298 err = generic_ide_ioctl(drive, bdev, cmd, arg); 299 300out: 301 mutex_unlock(&ide_floppy_ioctl_mutex); 302 return err; 303} 304