2 * ide-floppy IOCTLs handling.
5 #include <linux/kernel.h>
7 #include <linux/cdrom.h>
8 #include <linux/smp_lock.h>
10 #include <asm/unaligned.h>
12 #include <scsi/scsi_ioctl.h>
14 #include "ide-floppy.h"
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.
21 * Userland gives us the following structure:
23 * struct idefloppy_format_capacities {
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.
35 static int ide_floppy_get_format_capacities(ide_drive_t
*drive
,
36 struct ide_atapi_pc
*pc
,
39 struct ide_disk_obj
*floppy
= drive
->driver_data
;
40 int i
, blocks
, length
, u_array_size
, u_index
;
42 u8 pc_buf
[256], header_len
, desc_cnt
;
44 if (get_user(u_array_size
, arg
))
47 if (u_array_size
<= 0)
50 ide_floppy_create_read_capacity_cmd(pc
);
52 if (ide_queue_pc_tail(drive
, floppy
->disk
, pc
, pc_buf
, pc
->req_xfer
)) {
53 printk(KERN_ERR
"ide-floppy: Can't get floppy parameters\n");
57 header_len
= pc_buf
[3];
58 desc_cnt
= header_len
/ 8; /* capacity descriptor of 8 bytes */
64 * We always skip the first capacity descriptor. That's the current
65 * capacity. We are interested in the remaining descriptors, the
66 * formattable capacities.
68 for (i
= 1; i
< desc_cnt
; i
++) {
69 unsigned int desc_start
= 4 + i
*8;
71 if (u_index
>= u_array_size
)
72 break; /* User-supplied buffer too small */
74 blocks
= be32_to_cpup((__be32
*)&pc_buf
[desc_start
]);
75 length
= be16_to_cpup((__be16
*)&pc_buf
[desc_start
+ 6]);
77 if (put_user(blocks
, argp
))
82 if (put_user(length
, argp
))
90 if (put_user(u_index
, arg
))
96 static void ide_floppy_create_format_unit_cmd(struct ide_atapi_pc
*pc
,
97 u8
*buf
, int b
, int l
,
101 pc
->c
[0] = GPCMD_FORMAT_UNIT
;
106 /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
108 if (flags
& 1) /* Verify bit on... */
109 buf
[1] ^= 0x20; /* ... turn off DCRT bit */
112 put_unaligned(cpu_to_be32(b
), (unsigned int *)(&buf
[4]));
113 put_unaligned(cpu_to_be32(l
), (unsigned int *)(&buf
[8]));
115 pc
->flags
|= PC_FLAG_WRITING
;
118 static int ide_floppy_get_sfrp_bit(ide_drive_t
*drive
, struct ide_atapi_pc
*pc
)
120 struct ide_disk_obj
*floppy
= drive
->driver_data
;
123 drive
->atapi_flags
&= ~IDE_AFLAG_SRFP
;
125 ide_floppy_create_mode_sense_cmd(pc
, IDEFLOPPY_CAPABILITIES_PAGE
);
126 pc
->flags
|= PC_FLAG_SUPPRESS_ERROR
;
128 if (ide_queue_pc_tail(drive
, floppy
->disk
, pc
, buf
, pc
->req_xfer
))
131 if (buf
[8 + 2] & 0x40)
132 drive
->atapi_flags
|= IDE_AFLAG_SRFP
;
137 static int ide_floppy_format_unit(ide_drive_t
*drive
, struct ide_atapi_pc
*pc
,
140 struct ide_disk_obj
*floppy
= drive
->driver_data
;
142 int blocks
, length
, flags
, err
= 0;
144 if (floppy
->openers
> 1) {
145 /* Don't format if someone is using the disk */
146 drive
->dev_flags
&= ~IDE_DFLAG_FORMAT_IN_PROGRESS
;
150 drive
->dev_flags
|= IDE_DFLAG_FORMAT_IN_PROGRESS
;
153 * Send ATAPI_FORMAT_UNIT to the drive.
155 * Userland gives us the following structure:
157 * struct idefloppy_format_command {
163 * flags is a bitmask, currently, the only defined flag is:
165 * 0x01 - verify media after format.
167 if (get_user(blocks
, arg
) ||
168 get_user(length
, arg
+1) ||
169 get_user(flags
, arg
+2)) {
174 ide_floppy_get_sfrp_bit(drive
, pc
);
175 ide_floppy_create_format_unit_cmd(pc
, buf
, blocks
, length
, flags
);
177 if (ide_queue_pc_tail(drive
, floppy
->disk
, pc
, buf
, pc
->req_xfer
))
182 drive
->dev_flags
&= ~IDE_DFLAG_FORMAT_IN_PROGRESS
;
187 * Get ATAPI_FORMAT_UNIT progress indication.
189 * Userland gives a pointer to an int. The int is set to a progress
190 * indicator 0-65536, with 65536=100%.
192 * If the drive does not support format progress indication, we just check
193 * the dsc bit, and return either 0 or 65536.
196 static int ide_floppy_get_format_progress(ide_drive_t
*drive
,
197 struct ide_atapi_pc
*pc
,
200 struct ide_disk_obj
*floppy
= drive
->driver_data
;
202 int progress_indication
= 0x10000;
204 if (drive
->atapi_flags
& IDE_AFLAG_SRFP
) {
205 ide_create_request_sense_cmd(drive
, pc
);
206 if (ide_queue_pc_tail(drive
, floppy
->disk
, pc
, sense_buf
,
210 if (floppy
->sense_key
== 2 &&
213 progress_indication
= floppy
->progress_indication
;
215 /* Else assume format_unit has finished, and we're at 0x10000 */
217 ide_hwif_t
*hwif
= drive
->hwif
;
221 local_irq_save(flags
);
222 stat
= hwif
->tp_ops
->read_status(hwif
);
223 local_irq_restore(flags
);
225 progress_indication
= ((stat
& ATA_DSC
) == 0) ? 0 : 0x10000;
228 if (put_user(progress_indication
, arg
))
234 static int ide_floppy_lockdoor(ide_drive_t
*drive
, struct ide_atapi_pc
*pc
,
235 unsigned long arg
, unsigned int cmd
)
237 struct ide_disk_obj
*floppy
= drive
->driver_data
;
238 struct gendisk
*disk
= floppy
->disk
;
239 int prevent
= (arg
&& cmd
!= CDROMEJECT
) ? 1 : 0;
241 if (floppy
->openers
> 1)
244 ide_set_media_lock(drive
, disk
, prevent
);
246 if (cmd
== CDROMEJECT
)
247 ide_do_start_stop(drive
, disk
, 2);
252 static int ide_floppy_format_ioctl(ide_drive_t
*drive
, struct ide_atapi_pc
*pc
,
253 fmode_t mode
, unsigned int cmd
,
257 case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED
:
259 case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY
:
260 return ide_floppy_get_format_capacities(drive
, pc
, argp
);
261 case IDEFLOPPY_IOCTL_FORMAT_START
:
262 if (!(mode
& FMODE_WRITE
))
264 return ide_floppy_format_unit(drive
, pc
, (int __user
*)argp
);
265 case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS
:
266 return ide_floppy_get_format_progress(drive
, pc
, argp
);
272 int ide_floppy_ioctl(ide_drive_t
*drive
, struct block_device
*bdev
,
273 fmode_t mode
, unsigned int cmd
, unsigned long arg
)
275 struct ide_atapi_pc pc
;
276 void __user
*argp
= (void __user
*)arg
;
280 if (cmd
== CDROMEJECT
|| cmd
== CDROM_LOCKDOOR
) {
281 err
= ide_floppy_lockdoor(drive
, &pc
, arg
, cmd
);
285 err
= ide_floppy_format_ioctl(drive
, &pc
, mode
, cmd
, argp
);
290 * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
291 * and CDROM_SEND_PACKET (legacy) ioctls
293 if (cmd
!= CDROM_SEND_PACKET
&& cmd
!= SCSI_IOCTL_SEND_COMMAND
)
294 err
= scsi_cmd_ioctl(bdev
->bd_disk
->queue
, bdev
->bd_disk
,
298 err
= generic_ide_ioctl(drive
, bdev
, cmd
, arg
);