[PATCH] switch scsi_cmd_ioctl() to passing fmode_t
[linux-2.6.git] / drivers / ide / ide-floppy_ioctl.c
1 /*
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
34 static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
35 {
36         struct ide_disk_obj *floppy = drive->driver_data;
37         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
93 static 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
114 static int ide_floppy_get_sfrp_bit(ide_drive_t *drive)
115 {
116         struct ide_disk_obj *floppy = drive->driver_data;
117         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
133 static int ide_floppy_format_unit(ide_drive_t *drive, int __user *arg)
134 {
135         struct ide_disk_obj *floppy = drive->driver_data;
136         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 */
141                 drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS;
142                 return -EBUSY;
143         }
144
145         drive->dev_flags |= IDE_DFLAG_FORMAT_IN_PROGRESS;
146
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
175 out:
176         if (err)
177                 drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS;
178         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
191 static int ide_floppy_get_format_progress(ide_drive_t *drive, int __user *arg)
192 {
193         struct ide_disk_obj *floppy = drive->driver_data;
194         struct ide_atapi_pc pc;
195         int progress_indication = 0x10000;
196
197         if (drive->atapi_flags & IDE_AFLAG_SRFP) {
198                 ide_create_request_sense_cmd(drive, &pc);
199                 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
226 static int ide_floppy_lockdoor(ide_drive_t *drive, struct ide_atapi_pc *pc,
227                                unsigned long arg, unsigned int cmd)
228 {
229         struct ide_disk_obj *floppy = drive->driver_data;
230         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
244 static int ide_floppy_format_ioctl(ide_drive_t *drive, struct file *file,
245                                    unsigned int cmd, void __user *argp)
246 {
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:
253                 if (!(file->f_mode & FMODE_WRITE))
254                         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 }
262
263 int ide_floppy_ioctl(ide_drive_t *drive, struct inode *inode,
264                      struct file *file, unsigned int cmd, unsigned long arg)
265 {
266         struct block_device *bdev = inode->i_bdev;
267         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)
283                 err = scsi_cmd_ioctl(bdev->bd_disk->queue, bdev->bd_disk,
284                                 file ? file->f_mode : 0, cmd, argp);
285
286         if (err == -ENOTTY)
287                 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
288
289         return err;
290 }