Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
0127854d BZ |
2 | /* |
3 | * ide-floppy IOCTLs handling. | |
4 | */ | |
5 | ||
6 | #include <linux/kernel.h> | |
7 | #include <linux/ide.h> | |
8 | #include <linux/cdrom.h> | |
2a48fc0a | 9 | #include <linux/mutex.h> |
0127854d BZ |
10 | |
11 | #include <asm/unaligned.h> | |
12 | ||
13 | #include <scsi/scsi_ioctl.h> | |
14 | ||
15 | #include "ide-floppy.h" | |
16 | ||
17 | /* | |
18 | * Obtain the list of formattable capacities. | |
19 | * Very similar to ide_floppy_get_capacity, except that we push the capacity | |
20 | * descriptors to userland, instead of our own structures. | |
21 | * | |
22 | * Userland gives us the following structure: | |
23 | * | |
24 | * struct idefloppy_format_capacities { | |
25 | * int nformats; | |
26 | * struct { | |
27 | * int nblocks; | |
28 | * int blocksize; | |
29 | * } formats[]; | |
30 | * }; | |
31 | * | |
32 | * userland initializes nformats to the number of allocated formats[] records. | |
33 | * On exit we set nformats to the number of records we've actually initialized. | |
34 | */ | |
35 | ||
2a48fc0a | 36 | static DEFINE_MUTEX(ide_floppy_ioctl_mutex); |
07bd3f47 LT |
37 | static int ide_floppy_get_format_capacities(ide_drive_t *drive, |
38 | struct ide_atapi_pc *pc, | |
39 | int __user *arg) | |
0127854d | 40 | { |
806f80a6 | 41 | struct ide_disk_obj *floppy = drive->driver_data; |
0127854d BZ |
42 | int i, blocks, length, u_array_size, u_index; |
43 | int __user *argp; | |
41fa9f86 | 44 | u8 pc_buf[256], header_len, desc_cnt; |
0127854d BZ |
45 | |
46 | if (get_user(u_array_size, arg)) | |
47 | return -EFAULT; | |
48 | ||
49 | if (u_array_size <= 0) | |
50 | return -EINVAL; | |
51 | ||
07bd3f47 | 52 | ide_floppy_create_read_capacity_cmd(pc); |
41fa9f86 | 53 | |
b13345f3 | 54 | if (ide_queue_pc_tail(drive, floppy->disk, pc, pc_buf, pc->req_xfer)) { |
0127854d BZ |
55 | printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n"); |
56 | return -EIO; | |
57 | } | |
58 | ||
b13345f3 | 59 | header_len = pc_buf[3]; |
0127854d BZ |
60 | desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */ |
61 | ||
62 | u_index = 0; | |
63 | argp = arg + 1; | |
64 | ||
65 | /* | |
66 | * We always skip the first capacity descriptor. That's the current | |
67 | * capacity. We are interested in the remaining descriptors, the | |
68 | * formattable capacities. | |
69 | */ | |
70 | for (i = 1; i < desc_cnt; i++) { | |
71 | unsigned int desc_start = 4 + i*8; | |
72 | ||
73 | if (u_index >= u_array_size) | |
74 | break; /* User-supplied buffer too small */ | |
75 | ||
b13345f3 BP |
76 | blocks = be32_to_cpup((__be32 *)&pc_buf[desc_start]); |
77 | length = be16_to_cpup((__be16 *)&pc_buf[desc_start + 6]); | |
0127854d BZ |
78 | |
79 | if (put_user(blocks, argp)) | |
80 | return -EFAULT; | |
81 | ||
82 | ++argp; | |
83 | ||
84 | if (put_user(length, argp)) | |
85 | return -EFAULT; | |
86 | ||
87 | ++argp; | |
88 | ||
89 | ++u_index; | |
90 | } | |
91 | ||
92 | if (put_user(u_index, arg)) | |
93 | return -EFAULT; | |
94 | ||
95 | return 0; | |
96 | } | |
97 | ||
5122e517 BP |
98 | static void ide_floppy_create_format_unit_cmd(struct ide_atapi_pc *pc, |
99 | u8 *buf, int b, int l, | |
100 | int flags) | |
0127854d BZ |
101 | { |
102 | ide_init_pc(pc); | |
103 | pc->c[0] = GPCMD_FORMAT_UNIT; | |
104 | pc->c[1] = 0x17; | |
105 | ||
5122e517 BP |
106 | memset(buf, 0, 12); |
107 | buf[1] = 0xA2; | |
0127854d BZ |
108 | /* Default format list header, u8 1: FOV/DCRT/IMM bits set */ |
109 | ||
110 | if (flags & 1) /* Verify bit on... */ | |
5122e517 BP |
111 | buf[1] ^= 0x20; /* ... turn off DCRT bit */ |
112 | buf[3] = 8; | |
0127854d | 113 | |
5122e517 BP |
114 | put_unaligned(cpu_to_be32(b), (unsigned int *)(&buf[4])); |
115 | put_unaligned(cpu_to_be32(l), (unsigned int *)(&buf[8])); | |
116 | pc->req_xfer = 12; | |
0127854d BZ |
117 | pc->flags |= PC_FLAG_WRITING; |
118 | } | |
119 | ||
07bd3f47 | 120 | static int ide_floppy_get_sfrp_bit(ide_drive_t *drive, struct ide_atapi_pc *pc) |
0127854d | 121 | { |
0df96277 | 122 | struct ide_disk_obj *floppy = drive->driver_data; |
802e6634 | 123 | u8 buf[20]; |
0127854d BZ |
124 | |
125 | drive->atapi_flags &= ~IDE_AFLAG_SRFP; | |
126 | ||
07bd3f47 LT |
127 | ide_floppy_create_mode_sense_cmd(pc, IDEFLOPPY_CAPABILITIES_PAGE); |
128 | pc->flags |= PC_FLAG_SUPPRESS_ERROR; | |
0127854d | 129 | |
802e6634 | 130 | if (ide_queue_pc_tail(drive, floppy->disk, pc, buf, pc->req_xfer)) |
0127854d BZ |
131 | return 1; |
132 | ||
802e6634 | 133 | if (buf[8 + 2] & 0x40) |
0127854d BZ |
134 | drive->atapi_flags |= IDE_AFLAG_SRFP; |
135 | ||
136 | return 0; | |
137 | } | |
138 | ||
07bd3f47 LT |
139 | static int ide_floppy_format_unit(ide_drive_t *drive, struct ide_atapi_pc *pc, |
140 | int __user *arg) | |
0127854d | 141 | { |
0df96277 | 142 | struct ide_disk_obj *floppy = drive->driver_data; |
5122e517 | 143 | u8 buf[12]; |
0127854d BZ |
144 | int blocks, length, flags, err = 0; |
145 | ||
146 | if (floppy->openers > 1) { | |
147 | /* Don't format if someone is using the disk */ | |
e0128628 | 148 | drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS; |
0127854d BZ |
149 | return -EBUSY; |
150 | } | |
151 | ||
e0128628 | 152 | drive->dev_flags |= IDE_DFLAG_FORMAT_IN_PROGRESS; |
0127854d BZ |
153 | |
154 | /* | |
155 | * Send ATAPI_FORMAT_UNIT to the drive. | |
156 | * | |
157 | * Userland gives us the following structure: | |
158 | * | |
159 | * struct idefloppy_format_command { | |
160 | * int nblocks; | |
161 | * int blocksize; | |
162 | * int flags; | |
163 | * } ; | |
164 | * | |
165 | * flags is a bitmask, currently, the only defined flag is: | |
166 | * | |
167 | * 0x01 - verify media after format. | |
168 | */ | |
169 | if (get_user(blocks, arg) || | |
170 | get_user(length, arg+1) || | |
171 | get_user(flags, arg+2)) { | |
172 | err = -EFAULT; | |
173 | goto out; | |
174 | } | |
175 | ||
07bd3f47 | 176 | ide_floppy_get_sfrp_bit(drive, pc); |
5122e517 | 177 | ide_floppy_create_format_unit_cmd(pc, buf, blocks, length, flags); |
0127854d | 178 | |
5122e517 | 179 | if (ide_queue_pc_tail(drive, floppy->disk, pc, buf, pc->req_xfer)) |
0127854d BZ |
180 | err = -EIO; |
181 | ||
182 | out: | |
183 | if (err) | |
e0128628 | 184 | drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS; |
0127854d BZ |
185 | return err; |
186 | } | |
187 | ||
188 | /* | |
189 | * Get ATAPI_FORMAT_UNIT progress indication. | |
190 | * | |
191 | * Userland gives a pointer to an int. The int is set to a progress | |
192 | * indicator 0-65536, with 65536=100%. | |
193 | * | |
194 | * If the drive does not support format progress indication, we just check | |
195 | * the dsc bit, and return either 0 or 65536. | |
196 | */ | |
197 | ||
07bd3f47 LT |
198 | static int ide_floppy_get_format_progress(ide_drive_t *drive, |
199 | struct ide_atapi_pc *pc, | |
200 | int __user *arg) | |
0127854d | 201 | { |
0df96277 | 202 | struct ide_disk_obj *floppy = drive->driver_data; |
60cfab85 | 203 | u8 sense_buf[18]; |
0127854d BZ |
204 | int progress_indication = 0x10000; |
205 | ||
206 | if (drive->atapi_flags & IDE_AFLAG_SRFP) { | |
07bd3f47 | 207 | ide_create_request_sense_cmd(drive, pc); |
60cfab85 | 208 | if (ide_queue_pc_tail(drive, floppy->disk, pc, sense_buf, |
b13345f3 | 209 | pc->req_xfer)) |
0127854d BZ |
210 | return -EIO; |
211 | ||
212 | if (floppy->sense_key == 2 && | |
213 | floppy->asc == 4 && | |
214 | floppy->ascq == 4) | |
215 | progress_indication = floppy->progress_indication; | |
216 | ||
217 | /* Else assume format_unit has finished, and we're at 0x10000 */ | |
218 | } else { | |
219 | ide_hwif_t *hwif = drive->hwif; | |
220 | unsigned long flags; | |
221 | u8 stat; | |
222 | ||
223 | local_irq_save(flags); | |
224 | stat = hwif->tp_ops->read_status(hwif); | |
225 | local_irq_restore(flags); | |
226 | ||
227 | progress_indication = ((stat & ATA_DSC) == 0) ? 0 : 0x10000; | |
228 | } | |
229 | ||
230 | if (put_user(progress_indication, arg)) | |
231 | return -EFAULT; | |
232 | ||
233 | return 0; | |
234 | } | |
235 | ||
5bb1536a BZ |
236 | static int ide_floppy_lockdoor(ide_drive_t *drive, struct ide_atapi_pc *pc, |
237 | unsigned long arg, unsigned int cmd) | |
238 | { | |
0df96277 | 239 | struct ide_disk_obj *floppy = drive->driver_data; |
5bb1536a BZ |
240 | struct gendisk *disk = floppy->disk; |
241 | int prevent = (arg && cmd != CDROMEJECT) ? 1 : 0; | |
242 | ||
243 | if (floppy->openers > 1) | |
244 | return -EBUSY; | |
245 | ||
246 | ide_set_media_lock(drive, disk, prevent); | |
247 | ||
248 | if (cmd == CDROMEJECT) | |
249 | ide_do_start_stop(drive, disk, 2); | |
250 | ||
251 | return 0; | |
252 | } | |
253 | ||
07bd3f47 LT |
254 | static int ide_floppy_format_ioctl(ide_drive_t *drive, struct ide_atapi_pc *pc, |
255 | fmode_t mode, unsigned int cmd, | |
256 | void __user *argp) | |
0127854d BZ |
257 | { |
258 | switch (cmd) { | |
259 | case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED: | |
260 | return 0; | |
261 | case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY: | |
07bd3f47 | 262 | return ide_floppy_get_format_capacities(drive, pc, argp); |
0127854d | 263 | case IDEFLOPPY_IOCTL_FORMAT_START: |
badf8082 | 264 | if (!(mode & FMODE_WRITE)) |
0127854d | 265 | return -EPERM; |
07bd3f47 | 266 | return ide_floppy_format_unit(drive, pc, (int __user *)argp); |
0127854d | 267 | case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS: |
07bd3f47 | 268 | return ide_floppy_get_format_progress(drive, pc, argp); |
0127854d BZ |
269 | default: |
270 | return -ENOTTY; | |
271 | } | |
272 | } | |
5bb1536a | 273 | |
badf8082 AV |
274 | int ide_floppy_ioctl(ide_drive_t *drive, struct block_device *bdev, |
275 | fmode_t mode, unsigned int cmd, unsigned long arg) | |
5bb1536a | 276 | { |
5bb1536a BZ |
277 | struct ide_atapi_pc pc; |
278 | void __user *argp = (void __user *)arg; | |
279 | int err; | |
280 | ||
2a48fc0a | 281 | mutex_lock(&ide_floppy_ioctl_mutex); |
8a6cfeb6 AB |
282 | if (cmd == CDROMEJECT || cmd == CDROM_LOCKDOOR) { |
283 | err = ide_floppy_lockdoor(drive, &pc, arg, cmd); | |
284 | goto out; | |
285 | } | |
5bb1536a | 286 | |
07bd3f47 | 287 | err = ide_floppy_format_ioctl(drive, &pc, mode, cmd, argp); |
5bb1536a | 288 | if (err != -ENOTTY) |
8a6cfeb6 | 289 | goto out; |
5bb1536a BZ |
290 | |
291 | /* | |
292 | * skip SCSI_IOCTL_SEND_COMMAND (deprecated) | |
293 | * and CDROM_SEND_PACKET (legacy) ioctls | |
294 | */ | |
295 | if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND) | |
577ebb37 | 296 | err = scsi_cmd_blk_ioctl(bdev, mode, cmd, argp); |
5bb1536a BZ |
297 | |
298 | if (err == -ENOTTY) | |
1bddd9e6 | 299 | err = generic_ide_ioctl(drive, bdev, cmd, arg); |
5bb1536a | 300 | |
8a6cfeb6 | 301 | out: |
2a48fc0a | 302 | mutex_unlock(&ide_floppy_ioctl_mutex); |
5bb1536a BZ |
303 | return err; |
304 | } |