blob: 5af70a2c9ef889422c7d6206a54f6fb4ce735fe6 [file] [log] [blame]
Bartlomiej Zolnierkiewicz01278542008-10-10 22:39:38 +02001/*
2 * ide-floppy IOCTLs handling.
3 */
4
5#include <linux/kernel.h>
6#include <linux/ide.h>
7#include <linux/cdrom.h>
8
9#include <asm/unaligned.h>
10
11#include <scsi/scsi_ioctl.h>
12
13#include "ide-floppy.h"
14
15/*
16 * Obtain the list of formattable capacities.
17 * Very similar to ide_floppy_get_capacity, except that we push the capacity
18 * descriptors to userland, instead of our own structures.
19 *
20 * Userland gives us the following structure:
21 *
22 * struct idefloppy_format_capacities {
23 * int nformats;
24 * struct {
25 * int nblocks;
26 * int blocksize;
27 * } formats[];
28 * };
29 *
30 * userland initializes nformats to the number of allocated formats[] records.
31 * On exit we set nformats to the number of records we've actually initialized.
32 */
33
34static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
35{
Bartlomiej Zolnierkiewicz806f80a2008-10-17 18:09:14 +020036 struct ide_disk_obj *floppy = drive->driver_data;
Bartlomiej Zolnierkiewicz01278542008-10-10 22:39:38 +020037 struct ide_atapi_pc pc;
38 u8 header_len, desc_cnt;
39 int i, blocks, length, u_array_size, u_index;
40 int __user *argp;
41
42 if (get_user(u_array_size, arg))
43 return -EFAULT;
44
45 if (u_array_size <= 0)
46 return -EINVAL;
47
48 ide_floppy_create_read_capacity_cmd(&pc);
49 if (ide_queue_pc_tail(drive, floppy->disk, &pc)) {
50 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
51 return -EIO;
52 }
53
54 header_len = pc.buf[3];
55 desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
56
57 u_index = 0;
58 argp = arg + 1;
59
60 /*
61 * We always skip the first capacity descriptor. That's the current
62 * capacity. We are interested in the remaining descriptors, the
63 * formattable capacities.
64 */
65 for (i = 1; i < desc_cnt; i++) {
66 unsigned int desc_start = 4 + i*8;
67
68 if (u_index >= u_array_size)
69 break; /* User-supplied buffer too small */
70
71 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
72 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
73
74 if (put_user(blocks, argp))
75 return -EFAULT;
76
77 ++argp;
78
79 if (put_user(length, argp))
80 return -EFAULT;
81
82 ++argp;
83
84 ++u_index;
85 }
86
87 if (put_user(u_index, arg))
88 return -EFAULT;
89
90 return 0;
91}
92
93static void ide_floppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b,
94 int l, int flags)
95{
96 ide_init_pc(pc);
97 pc->c[0] = GPCMD_FORMAT_UNIT;
98 pc->c[1] = 0x17;
99
100 memset(pc->buf, 0, 12);
101 pc->buf[1] = 0xA2;
102 /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
103
104 if (flags & 1) /* Verify bit on... */
105 pc->buf[1] ^= 0x20; /* ... turn off DCRT bit */
106 pc->buf[3] = 8;
107
108 put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buf[4]));
109 put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buf[8]));
110 pc->buf_size = 12;
111 pc->flags |= PC_FLAG_WRITING;
112}
113
114static int ide_floppy_get_sfrp_bit(ide_drive_t *drive)
115{
Bartlomiej Zolnierkiewicz0df96272008-10-17 18:09:16 +0200116 struct ide_disk_obj *floppy = drive->driver_data;
Bartlomiej Zolnierkiewicz01278542008-10-10 22:39:38 +0200117 struct ide_atapi_pc pc;
118
119 drive->atapi_flags &= ~IDE_AFLAG_SRFP;
120
121 ide_floppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE);
122 pc.flags |= PC_FLAG_SUPPRESS_ERROR;
123
124 if (ide_queue_pc_tail(drive, floppy->disk, &pc))
125 return 1;
126
127 if (pc.buf[8 + 2] & 0x40)
128 drive->atapi_flags |= IDE_AFLAG_SRFP;
129
130 return 0;
131}
132
133static int ide_floppy_format_unit(ide_drive_t *drive, int __user *arg)
134{
Bartlomiej Zolnierkiewicz0df96272008-10-17 18:09:16 +0200135 struct ide_disk_obj *floppy = drive->driver_data;
Bartlomiej Zolnierkiewicz01278542008-10-10 22:39:38 +0200136 struct ide_atapi_pc pc;
137 int blocks, length, flags, err = 0;
138
139 if (floppy->openers > 1) {
140 /* Don't format if someone is using the disk */
Bartlomiej Zolnierkiewicze0128622008-10-17 18:09:11 +0200141 drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS;
Bartlomiej Zolnierkiewicz01278542008-10-10 22:39:38 +0200142 return -EBUSY;
143 }
144
Bartlomiej Zolnierkiewicze0128622008-10-17 18:09:11 +0200145 drive->dev_flags |= IDE_DFLAG_FORMAT_IN_PROGRESS;
Bartlomiej Zolnierkiewicz01278542008-10-10 22:39:38 +0200146
147 /*
148 * Send ATAPI_FORMAT_UNIT to the drive.
149 *
150 * Userland gives us the following structure:
151 *
152 * struct idefloppy_format_command {
153 * int nblocks;
154 * int blocksize;
155 * int flags;
156 * } ;
157 *
158 * flags is a bitmask, currently, the only defined flag is:
159 *
160 * 0x01 - verify media after format.
161 */
162 if (get_user(blocks, arg) ||
163 get_user(length, arg+1) ||
164 get_user(flags, arg+2)) {
165 err = -EFAULT;
166 goto out;
167 }
168
169 (void)ide_floppy_get_sfrp_bit(drive);
170 ide_floppy_create_format_unit_cmd(&pc, blocks, length, flags);
171
172 if (ide_queue_pc_tail(drive, floppy->disk, &pc))
173 err = -EIO;
174
175out:
176 if (err)
Bartlomiej Zolnierkiewicze0128622008-10-17 18:09:11 +0200177 drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS;
Bartlomiej Zolnierkiewicz01278542008-10-10 22:39:38 +0200178 return err;
179}
180
181/*
182 * Get ATAPI_FORMAT_UNIT progress indication.
183 *
184 * Userland gives a pointer to an int. The int is set to a progress
185 * indicator 0-65536, with 65536=100%.
186 *
187 * If the drive does not support format progress indication, we just check
188 * the dsc bit, and return either 0 or 65536.
189 */
190
191static int ide_floppy_get_format_progress(ide_drive_t *drive, int __user *arg)
192{
Bartlomiej Zolnierkiewicz0df96272008-10-17 18:09:16 +0200193 struct ide_disk_obj *floppy = drive->driver_data;
Bartlomiej Zolnierkiewicz01278542008-10-10 22:39:38 +0200194 struct ide_atapi_pc pc;
195 int progress_indication = 0x10000;
196
197 if (drive->atapi_flags & IDE_AFLAG_SRFP) {
Bartlomiej Zolnierkiewicz6b0da282008-10-13 21:39:32 +0200198 ide_create_request_sense_cmd(drive, &pc);
Bartlomiej Zolnierkiewicz01278542008-10-10 22:39:38 +0200199 if (ide_queue_pc_tail(drive, floppy->disk, &pc))
200 return -EIO;
201
202 if (floppy->sense_key == 2 &&
203 floppy->asc == 4 &&
204 floppy->ascq == 4)
205 progress_indication = floppy->progress_indication;
206
207 /* Else assume format_unit has finished, and we're at 0x10000 */
208 } else {
209 ide_hwif_t *hwif = drive->hwif;
210 unsigned long flags;
211 u8 stat;
212
213 local_irq_save(flags);
214 stat = hwif->tp_ops->read_status(hwif);
215 local_irq_restore(flags);
216
217 progress_indication = ((stat & ATA_DSC) == 0) ? 0 : 0x10000;
218 }
219
220 if (put_user(progress_indication, arg))
221 return -EFAULT;
222
223 return 0;
224}
225
Bartlomiej Zolnierkiewicz5bb15362008-10-13 21:39:44 +0200226static int ide_floppy_lockdoor(ide_drive_t *drive, struct ide_atapi_pc *pc,
227 unsigned long arg, unsigned int cmd)
228{
Bartlomiej Zolnierkiewicz0df96272008-10-17 18:09:16 +0200229 struct ide_disk_obj *floppy = drive->driver_data;
Bartlomiej Zolnierkiewicz5bb15362008-10-13 21:39:44 +0200230 struct gendisk *disk = floppy->disk;
231 int prevent = (arg && cmd != CDROMEJECT) ? 1 : 0;
232
233 if (floppy->openers > 1)
234 return -EBUSY;
235
236 ide_set_media_lock(drive, disk, prevent);
237
238 if (cmd == CDROMEJECT)
239 ide_do_start_stop(drive, disk, 2);
240
241 return 0;
242}
243
244static int ide_floppy_format_ioctl(ide_drive_t *drive, struct file *file,
245 unsigned int cmd, void __user *argp)
Bartlomiej Zolnierkiewicz01278542008-10-10 22:39:38 +0200246{
247 switch (cmd) {
248 case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
249 return 0;
250 case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
251 return ide_floppy_get_format_capacities(drive, argp);
252 case IDEFLOPPY_IOCTL_FORMAT_START:
Al Viroaeb5d722008-09-02 15:28:45 -0400253 if (!(file->f_mode & FMODE_WRITE))
Bartlomiej Zolnierkiewicz01278542008-10-10 22:39:38 +0200254 return -EPERM;
255 return ide_floppy_format_unit(drive, (int __user *)argp);
256 case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
257 return ide_floppy_get_format_progress(drive, argp);
258 default:
259 return -ENOTTY;
260 }
261}
Bartlomiej Zolnierkiewicz5bb15362008-10-13 21:39:44 +0200262
Bartlomiej Zolnierkiewicz806f80a2008-10-17 18:09:14 +0200263int ide_floppy_ioctl(ide_drive_t *drive, struct inode *inode,
264 struct file *file, unsigned int cmd, unsigned long arg)
Bartlomiej Zolnierkiewicz5bb15362008-10-13 21:39:44 +0200265{
266 struct block_device *bdev = inode->i_bdev;
Bartlomiej Zolnierkiewicz5bb15362008-10-13 21:39:44 +0200267 struct ide_atapi_pc pc;
268 void __user *argp = (void __user *)arg;
269 int err;
270
271 if (cmd == CDROMEJECT || cmd == CDROM_LOCKDOOR)
272 return ide_floppy_lockdoor(drive, &pc, arg, cmd);
273
274 err = ide_floppy_format_ioctl(drive, file, cmd, argp);
275 if (err != -ENOTTY)
276 return err;
277
278 /*
279 * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
280 * and CDROM_SEND_PACKET (legacy) ioctls
281 */
282 if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
Al Viro74f3c8a2007-08-27 15:38:10 -0400283 err = scsi_cmd_ioctl(bdev->bd_disk->queue, bdev->bd_disk,
284 file ? file->f_mode : 0, cmd, argp);
Bartlomiej Zolnierkiewicz5bb15362008-10-13 21:39:44 +0200285
286 if (err == -ENOTTY)
Al Viro1bddd9e2008-09-02 17:19:43 -0400287 err = generic_ide_ioctl(drive, bdev, cmd, arg);
Bartlomiej Zolnierkiewicz5bb15362008-10-13 21:39:44 +0200288
289 return err;
290}