Commit | Line | Data |
---|---|---|
0127854d BZ |
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 | ||
07bd3f47 LT |
34 | static int ide_floppy_get_format_capacities(ide_drive_t *drive, |
35 | struct ide_atapi_pc *pc, | |
36 | int __user *arg) | |
0127854d | 37 | { |
806f80a6 | 38 | struct ide_disk_obj *floppy = drive->driver_data; |
0127854d BZ |
39 | u8 header_len, desc_cnt; |
40 | int i, blocks, length, u_array_size, u_index; | |
41 | int __user *argp; | |
42 | ||
43 | if (get_user(u_array_size, arg)) | |
44 | return -EFAULT; | |
45 | ||
46 | if (u_array_size <= 0) | |
47 | return -EINVAL; | |
48 | ||
07bd3f47 LT |
49 | ide_floppy_create_read_capacity_cmd(pc); |
50 | if (ide_queue_pc_tail(drive, floppy->disk, pc)) { | |
0127854d BZ |
51 | printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n"); |
52 | return -EIO; | |
53 | } | |
54 | ||
07bd3f47 | 55 | header_len = pc->buf[3]; |
0127854d BZ |
56 | desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */ |
57 | ||
58 | u_index = 0; | |
59 | argp = arg + 1; | |
60 | ||
61 | /* | |
62 | * We always skip the first capacity descriptor. That's the current | |
63 | * capacity. We are interested in the remaining descriptors, the | |
64 | * formattable capacities. | |
65 | */ | |
66 | for (i = 1; i < desc_cnt; i++) { | |
67 | unsigned int desc_start = 4 + i*8; | |
68 | ||
69 | if (u_index >= u_array_size) | |
70 | break; /* User-supplied buffer too small */ | |
71 | ||
07bd3f47 LT |
72 | blocks = be32_to_cpup((__be32 *)&pc->buf[desc_start]); |
73 | length = be16_to_cpup((__be16 *)&pc->buf[desc_start + 6]); | |
0127854d BZ |
74 | |
75 | if (put_user(blocks, argp)) | |
76 | return -EFAULT; | |
77 | ||
78 | ++argp; | |
79 | ||
80 | if (put_user(length, argp)) | |
81 | return -EFAULT; | |
82 | ||
83 | ++argp; | |
84 | ||
85 | ++u_index; | |
86 | } | |
87 | ||
88 | if (put_user(u_index, arg)) | |
89 | return -EFAULT; | |
90 | ||
91 | return 0; | |
92 | } | |
93 | ||
94 | static void ide_floppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b, | |
95 | int l, int flags) | |
96 | { | |
97 | ide_init_pc(pc); | |
98 | pc->c[0] = GPCMD_FORMAT_UNIT; | |
99 | pc->c[1] = 0x17; | |
100 | ||
101 | memset(pc->buf, 0, 12); | |
102 | pc->buf[1] = 0xA2; | |
103 | /* Default format list header, u8 1: FOV/DCRT/IMM bits set */ | |
104 | ||
105 | if (flags & 1) /* Verify bit on... */ | |
106 | pc->buf[1] ^= 0x20; /* ... turn off DCRT bit */ | |
107 | pc->buf[3] = 8; | |
108 | ||
109 | put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buf[4])); | |
110 | put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buf[8])); | |
111 | pc->buf_size = 12; | |
112 | pc->flags |= PC_FLAG_WRITING; | |
113 | } | |
114 | ||
07bd3f47 | 115 | static int ide_floppy_get_sfrp_bit(ide_drive_t *drive, struct ide_atapi_pc *pc) |
0127854d | 116 | { |
0df96277 | 117 | struct ide_disk_obj *floppy = drive->driver_data; |
0127854d BZ |
118 | |
119 | drive->atapi_flags &= ~IDE_AFLAG_SRFP; | |
120 | ||
07bd3f47 LT |
121 | ide_floppy_create_mode_sense_cmd(pc, IDEFLOPPY_CAPABILITIES_PAGE); |
122 | pc->flags |= PC_FLAG_SUPPRESS_ERROR; | |
0127854d | 123 | |
07bd3f47 | 124 | if (ide_queue_pc_tail(drive, floppy->disk, pc)) |
0127854d BZ |
125 | return 1; |
126 | ||
07bd3f47 | 127 | if (pc->buf[8 + 2] & 0x40) |
0127854d BZ |
128 | drive->atapi_flags |= IDE_AFLAG_SRFP; |
129 | ||
130 | return 0; | |
131 | } | |
132 | ||
07bd3f47 LT |
133 | static int ide_floppy_format_unit(ide_drive_t *drive, struct ide_atapi_pc *pc, |
134 | int __user *arg) | |
0127854d | 135 | { |
0df96277 | 136 | struct ide_disk_obj *floppy = drive->driver_data; |
0127854d BZ |
137 | int blocks, length, flags, err = 0; |
138 | ||
139 | if (floppy->openers > 1) { | |
140 | /* Don't format if someone is using the disk */ | |
e0128628 | 141 | drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS; |
0127854d BZ |
142 | return -EBUSY; |
143 | } | |
144 | ||
e0128628 | 145 | drive->dev_flags |= IDE_DFLAG_FORMAT_IN_PROGRESS; |
0127854d BZ |
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 | ||
07bd3f47 LT |
169 | ide_floppy_get_sfrp_bit(drive, pc); |
170 | ide_floppy_create_format_unit_cmd(pc, blocks, length, flags); | |
0127854d | 171 | |
07bd3f47 | 172 | if (ide_queue_pc_tail(drive, floppy->disk, pc)) |
0127854d BZ |
173 | err = -EIO; |
174 | ||
175 | out: | |
176 | if (err) | |
e0128628 | 177 | drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS; |
0127854d BZ |
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 | ||
07bd3f47 LT |
191 | static int ide_floppy_get_format_progress(ide_drive_t *drive, |
192 | struct ide_atapi_pc *pc, | |
193 | int __user *arg) | |
0127854d | 194 | { |
0df96277 | 195 | struct ide_disk_obj *floppy = drive->driver_data; |
0127854d BZ |
196 | int progress_indication = 0x10000; |
197 | ||
198 | if (drive->atapi_flags & IDE_AFLAG_SRFP) { | |
07bd3f47 LT |
199 | ide_create_request_sense_cmd(drive, pc); |
200 | if (ide_queue_pc_tail(drive, floppy->disk, pc)) | |
0127854d BZ |
201 | return -EIO; |
202 | ||
203 | if (floppy->sense_key == 2 && | |
204 | floppy->asc == 4 && | |
205 | floppy->ascq == 4) | |
206 | progress_indication = floppy->progress_indication; | |
207 | ||
208 | /* Else assume format_unit has finished, and we're at 0x10000 */ | |
209 | } else { | |
210 | ide_hwif_t *hwif = drive->hwif; | |
211 | unsigned long flags; | |
212 | u8 stat; | |
213 | ||
214 | local_irq_save(flags); | |
215 | stat = hwif->tp_ops->read_status(hwif); | |
216 | local_irq_restore(flags); | |
217 | ||
218 | progress_indication = ((stat & ATA_DSC) == 0) ? 0 : 0x10000; | |
219 | } | |
220 | ||
221 | if (put_user(progress_indication, arg)) | |
222 | return -EFAULT; | |
223 | ||
224 | return 0; | |
225 | } | |
226 | ||
5bb1536a BZ |
227 | static int ide_floppy_lockdoor(ide_drive_t *drive, struct ide_atapi_pc *pc, |
228 | unsigned long arg, unsigned int cmd) | |
229 | { | |
0df96277 | 230 | struct ide_disk_obj *floppy = drive->driver_data; |
5bb1536a BZ |
231 | struct gendisk *disk = floppy->disk; |
232 | int prevent = (arg && cmd != CDROMEJECT) ? 1 : 0; | |
233 | ||
234 | if (floppy->openers > 1) | |
235 | return -EBUSY; | |
236 | ||
237 | ide_set_media_lock(drive, disk, prevent); | |
238 | ||
239 | if (cmd == CDROMEJECT) | |
240 | ide_do_start_stop(drive, disk, 2); | |
241 | ||
242 | return 0; | |
243 | } | |
244 | ||
07bd3f47 LT |
245 | static int ide_floppy_format_ioctl(ide_drive_t *drive, struct ide_atapi_pc *pc, |
246 | fmode_t mode, unsigned int cmd, | |
247 | void __user *argp) | |
0127854d BZ |
248 | { |
249 | switch (cmd) { | |
250 | case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED: | |
251 | return 0; | |
252 | case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY: | |
07bd3f47 | 253 | return ide_floppy_get_format_capacities(drive, pc, argp); |
0127854d | 254 | case IDEFLOPPY_IOCTL_FORMAT_START: |
badf8082 | 255 | if (!(mode & FMODE_WRITE)) |
0127854d | 256 | return -EPERM; |
07bd3f47 | 257 | return ide_floppy_format_unit(drive, pc, (int __user *)argp); |
0127854d | 258 | case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS: |
07bd3f47 | 259 | return ide_floppy_get_format_progress(drive, pc, argp); |
0127854d BZ |
260 | default: |
261 | return -ENOTTY; | |
262 | } | |
263 | } | |
5bb1536a | 264 | |
badf8082 AV |
265 | int ide_floppy_ioctl(ide_drive_t *drive, struct block_device *bdev, |
266 | fmode_t mode, unsigned int cmd, unsigned long arg) | |
5bb1536a | 267 | { |
5bb1536a BZ |
268 | struct ide_atapi_pc pc; |
269 | void __user *argp = (void __user *)arg; | |
270 | int err; | |
271 | ||
272 | if (cmd == CDROMEJECT || cmd == CDROM_LOCKDOOR) | |
273 | return ide_floppy_lockdoor(drive, &pc, arg, cmd); | |
274 | ||
07bd3f47 | 275 | err = ide_floppy_format_ioctl(drive, &pc, mode, cmd, argp); |
5bb1536a BZ |
276 | if (err != -ENOTTY) |
277 | return err; | |
278 | ||
279 | /* | |
280 | * skip SCSI_IOCTL_SEND_COMMAND (deprecated) | |
281 | * and CDROM_SEND_PACKET (legacy) ioctls | |
282 | */ | |
283 | if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND) | |
74f3c8af | 284 | err = scsi_cmd_ioctl(bdev->bd_disk->queue, bdev->bd_disk, |
badf8082 | 285 | mode, cmd, argp); |
5bb1536a BZ |
286 | |
287 | if (err == -ENOTTY) | |
1bddd9e6 | 288 | err = generic_ide_ioctl(drive, bdev, cmd, arg); |
5bb1536a BZ |
289 | |
290 | return err; | |
291 | } |