Commit | Line | Data |
---|---|---|
05236ea6 BZ |
1 | /* |
2 | * IDE ioctls handling. | |
3 | */ | |
4 | ||
5 | #include <linux/hdreg.h> | |
6 | #include <linux/ide.h> | |
7 | ||
8 | static const struct ide_ioctl_devset ide_ioctl_settings[] = { | |
92f1f8fd EO |
9 | { HDIO_GET_32BIT, HDIO_SET_32BIT, &ide_devset_io_32bit }, |
10 | { HDIO_GET_KEEPSETTINGS, HDIO_SET_KEEPSETTINGS, &ide_devset_keepsettings }, | |
11 | { HDIO_GET_UNMASKINTR, HDIO_SET_UNMASKINTR, &ide_devset_unmaskirq }, | |
12 | { HDIO_GET_DMA, HDIO_SET_DMA, &ide_devset_using_dma }, | |
13 | { -1, HDIO_SET_PIO_MODE, &ide_devset_pio_mode }, | |
05236ea6 BZ |
14 | { 0 } |
15 | }; | |
16 | ||
17 | int ide_setting_ioctl(ide_drive_t *drive, struct block_device *bdev, | |
18 | unsigned int cmd, unsigned long arg, | |
19 | const struct ide_ioctl_devset *s) | |
20 | { | |
92f1f8fd | 21 | const struct ide_devset *ds; |
05236ea6 BZ |
22 | unsigned long flags; |
23 | int err = -EOPNOTSUPP; | |
24 | ||
92f1f8fd EO |
25 | for (; (ds = s->setting); s++) { |
26 | if (ds->get && s->get_ioctl == cmd) | |
05236ea6 | 27 | goto read_val; |
92f1f8fd | 28 | else if (ds->set && s->set_ioctl == cmd) |
05236ea6 BZ |
29 | goto set_val; |
30 | } | |
31 | ||
32 | return err; | |
33 | ||
34 | read_val: | |
35 | mutex_lock(&ide_setting_mtx); | |
36 | spin_lock_irqsave(&ide_lock, flags); | |
92f1f8fd | 37 | err = ds->get(drive); |
05236ea6 BZ |
38 | spin_unlock_irqrestore(&ide_lock, flags); |
39 | mutex_unlock(&ide_setting_mtx); | |
40 | return err >= 0 ? put_user(err, (long __user *)arg) : err; | |
41 | ||
42 | set_val: | |
43 | if (bdev != bdev->bd_contains) | |
44 | err = -EINVAL; | |
45 | else { | |
46 | if (!capable(CAP_SYS_ADMIN)) | |
47 | err = -EACCES; | |
48 | else { | |
49 | mutex_lock(&ide_setting_mtx); | |
92f1f8fd | 50 | err = ide_devset_execute(drive, ds, arg); |
05236ea6 BZ |
51 | mutex_unlock(&ide_setting_mtx); |
52 | } | |
53 | } | |
54 | return err; | |
55 | } | |
56 | EXPORT_SYMBOL_GPL(ide_setting_ioctl); | |
57 | ||
58 | static int ide_get_identity_ioctl(ide_drive_t *drive, unsigned int cmd, | |
59 | unsigned long arg) | |
60 | { | |
61 | u16 *id = NULL; | |
62 | int size = (cmd == HDIO_GET_IDENTITY) ? (ATA_ID_WORDS * 2) : 142; | |
63 | int rc = 0; | |
64 | ||
97100fc8 | 65 | if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { |
05236ea6 BZ |
66 | rc = -ENOMSG; |
67 | goto out; | |
68 | } | |
69 | ||
70 | id = kmalloc(size, GFP_KERNEL); | |
71 | if (id == NULL) { | |
72 | rc = -ENOMEM; | |
73 | goto out; | |
74 | } | |
75 | ||
76 | memcpy(id, drive->id, size); | |
77 | ata_id_to_hd_driveid(id); | |
78 | ||
79 | if (copy_to_user((void __user *)arg, id, size)) | |
80 | rc = -EFAULT; | |
81 | ||
82 | kfree(id); | |
83 | out: | |
84 | return rc; | |
85 | } | |
86 | ||
87 | static int ide_get_nice_ioctl(ide_drive_t *drive, unsigned long arg) | |
88 | { | |
97100fc8 BZ |
89 | return put_user((!!(drive->dev_flags & IDE_DFLAG_DSC_OVERLAP) |
90 | << IDE_NICE_DSC_OVERLAP) | | |
91 | (!!(drive->dev_flags & IDE_DFLAG_NICE1) | |
92 | << IDE_NICE_1), (long __user *)arg); | |
05236ea6 BZ |
93 | } |
94 | ||
95 | static int ide_set_nice_ioctl(ide_drive_t *drive, unsigned long arg) | |
96 | { | |
97 | if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1)))) | |
98 | return -EPERM; | |
99 | ||
100 | if (((arg >> IDE_NICE_DSC_OVERLAP) & 1) && | |
101 | (drive->media == ide_disk || drive->media == ide_floppy || | |
97100fc8 | 102 | (drive->dev_flags & IDE_DFLAG_SCSI))) |
05236ea6 BZ |
103 | return -EPERM; |
104 | ||
97100fc8 BZ |
105 | if ((arg >> IDE_NICE_DSC_OVERLAP) & 1) |
106 | drive->dev_flags |= IDE_DFLAG_DSC_OVERLAP; | |
107 | else | |
108 | drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP; | |
109 | ||
110 | if ((arg >> IDE_NICE_1) & 1) | |
111 | drive->dev_flags |= IDE_DFLAG_NICE1; | |
112 | else | |
113 | drive->dev_flags &= ~IDE_DFLAG_NICE1; | |
05236ea6 BZ |
114 | |
115 | return 0; | |
116 | } | |
117 | ||
118 | static int ide_cmd_ioctl(ide_drive_t *drive, unsigned cmd, unsigned long arg) | |
119 | { | |
120 | u8 *buf = NULL; | |
121 | int bufsize = 0, err = 0; | |
122 | u8 args[4], xfer_rate = 0; | |
123 | ide_task_t tfargs; | |
124 | struct ide_taskfile *tf = &tfargs.tf; | |
125 | u16 *id = drive->id; | |
126 | ||
127 | if (NULL == (void *) arg) { | |
128 | struct request *rq; | |
129 | ||
130 | rq = blk_get_request(drive->queue, READ, __GFP_WAIT); | |
131 | rq->cmd_type = REQ_TYPE_ATA_TASKFILE; | |
132 | err = blk_execute_rq(drive->queue, NULL, rq, 0); | |
133 | blk_put_request(rq); | |
134 | ||
135 | return err; | |
136 | } | |
137 | ||
138 | if (copy_from_user(args, (void __user *)arg, 4)) | |
139 | return -EFAULT; | |
140 | ||
141 | memset(&tfargs, 0, sizeof(ide_task_t)); | |
142 | tf->feature = args[2]; | |
143 | if (args[0] == ATA_CMD_SMART) { | |
144 | tf->nsect = args[3]; | |
145 | tf->lbal = args[1]; | |
146 | tf->lbam = 0x4f; | |
147 | tf->lbah = 0xc2; | |
148 | tfargs.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_IN_NSECT; | |
149 | } else { | |
150 | tf->nsect = args[1]; | |
151 | tfargs.tf_flags = IDE_TFLAG_OUT_FEATURE | | |
152 | IDE_TFLAG_OUT_NSECT | IDE_TFLAG_IN_NSECT; | |
153 | } | |
154 | tf->command = args[0]; | |
155 | tfargs.data_phase = args[3] ? TASKFILE_IN : TASKFILE_NO_DATA; | |
156 | ||
157 | if (args[3]) { | |
158 | tfargs.tf_flags |= IDE_TFLAG_IO_16BIT; | |
159 | bufsize = SECTOR_SIZE * args[3]; | |
160 | buf = kzalloc(bufsize, GFP_KERNEL); | |
161 | if (buf == NULL) | |
162 | return -ENOMEM; | |
163 | } | |
164 | ||
165 | if (tf->command == ATA_CMD_SET_FEATURES && | |
166 | tf->feature == SETFEATURES_XFER && | |
167 | tf->nsect >= XFER_SW_DMA_0 && | |
168 | (id[ATA_ID_UDMA_MODES] || | |
169 | id[ATA_ID_MWDMA_MODES] || | |
170 | id[ATA_ID_SWDMA_MODES])) { | |
171 | xfer_rate = args[1]; | |
172 | if (tf->nsect > XFER_UDMA_2 && !eighty_ninty_three(drive)) { | |
173 | printk(KERN_WARNING "%s: UDMA speeds >UDMA33 cannot " | |
174 | "be set\n", drive->name); | |
175 | goto abort; | |
176 | } | |
177 | } | |
178 | ||
179 | err = ide_raw_taskfile(drive, &tfargs, buf, args[3]); | |
180 | ||
181 | args[0] = tf->status; | |
182 | args[1] = tf->error; | |
183 | args[2] = tf->nsect; | |
184 | ||
185 | if (!err && xfer_rate) { | |
186 | /* active-retuning-calls future */ | |
187 | ide_set_xfer_rate(drive, xfer_rate); | |
188 | ide_driveid_update(drive); | |
189 | } | |
190 | abort: | |
191 | if (copy_to_user((void __user *)arg, &args, 4)) | |
192 | err = -EFAULT; | |
193 | if (buf) { | |
194 | if (copy_to_user((void __user *)(arg + 4), buf, bufsize)) | |
195 | err = -EFAULT; | |
196 | kfree(buf); | |
197 | } | |
198 | return err; | |
199 | } | |
200 | ||
201 | static int ide_task_ioctl(ide_drive_t *drive, unsigned cmd, unsigned long arg) | |
202 | { | |
203 | void __user *p = (void __user *)arg; | |
204 | int err = 0; | |
205 | u8 args[7]; | |
206 | ide_task_t task; | |
207 | ||
208 | if (copy_from_user(args, p, 7)) | |
209 | return -EFAULT; | |
210 | ||
211 | memset(&task, 0, sizeof(task)); | |
212 | memcpy(&task.tf_array[7], &args[1], 6); | |
213 | task.tf.command = args[0]; | |
214 | task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; | |
215 | ||
216 | err = ide_no_data_taskfile(drive, &task); | |
217 | ||
218 | args[0] = task.tf.command; | |
219 | memcpy(&args[1], &task.tf_array[7], 6); | |
220 | ||
221 | if (copy_to_user(p, args, 7)) | |
222 | err = -EFAULT; | |
223 | ||
224 | return err; | |
225 | } | |
226 | ||
227 | static int generic_drive_reset(ide_drive_t *drive) | |
228 | { | |
229 | struct request *rq; | |
230 | int ret = 0; | |
231 | ||
232 | rq = blk_get_request(drive->queue, READ, __GFP_WAIT); | |
233 | rq->cmd_type = REQ_TYPE_SPECIAL; | |
234 | rq->cmd_len = 1; | |
235 | rq->cmd[0] = REQ_DRIVE_RESET; | |
236 | rq->cmd_flags |= REQ_SOFTBARRIER; | |
237 | if (blk_execute_rq(drive->queue, NULL, rq, 1)) | |
238 | ret = rq->errors; | |
239 | blk_put_request(rq); | |
240 | return ret; | |
241 | } | |
242 | ||
243 | int generic_ide_ioctl(ide_drive_t *drive, struct file *file, | |
244 | struct block_device *bdev, | |
245 | unsigned int cmd, unsigned long arg) | |
246 | { | |
247 | int err; | |
248 | ||
249 | err = ide_setting_ioctl(drive, bdev, cmd, arg, ide_ioctl_settings); | |
250 | if (err != -EOPNOTSUPP) | |
251 | return err; | |
252 | ||
253 | switch (cmd) { | |
254 | case HDIO_OBSOLETE_IDENTITY: | |
255 | case HDIO_GET_IDENTITY: | |
256 | if (bdev != bdev->bd_contains) | |
257 | return -EINVAL; | |
258 | return ide_get_identity_ioctl(drive, cmd, arg); | |
259 | case HDIO_GET_NICE: | |
260 | return ide_get_nice_ioctl(drive, arg); | |
261 | case HDIO_SET_NICE: | |
262 | if (!capable(CAP_SYS_ADMIN)) | |
263 | return -EACCES; | |
264 | return ide_set_nice_ioctl(drive, arg); | |
265 | #ifdef CONFIG_IDE_TASK_IOCTL | |
266 | case HDIO_DRIVE_TASKFILE: | |
267 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) | |
268 | return -EACCES; | |
269 | if (drive->media == ide_disk) | |
270 | return ide_taskfile_ioctl(drive, cmd, arg); | |
271 | return -ENOMSG; | |
272 | #endif | |
273 | case HDIO_DRIVE_CMD: | |
274 | if (!capable(CAP_SYS_RAWIO)) | |
275 | return -EACCES; | |
276 | return ide_cmd_ioctl(drive, cmd, arg); | |
277 | case HDIO_DRIVE_TASK: | |
278 | if (!capable(CAP_SYS_RAWIO)) | |
279 | return -EACCES; | |
280 | return ide_task_ioctl(drive, cmd, arg); | |
281 | case HDIO_DRIVE_RESET: | |
282 | if (!capable(CAP_SYS_ADMIN)) | |
283 | return -EACCES; | |
284 | return generic_drive_reset(drive); | |
285 | case HDIO_GET_BUSSTATE: | |
286 | if (!capable(CAP_SYS_ADMIN)) | |
287 | return -EACCES; | |
288 | if (put_user(BUSSTATE_ON, (long __user *)arg)) | |
289 | return -EFAULT; | |
290 | return 0; | |
291 | case HDIO_SET_BUSSTATE: | |
292 | if (!capable(CAP_SYS_ADMIN)) | |
293 | return -EACCES; | |
294 | return -EOPNOTSUPP; | |
295 | default: | |
296 | return -EINVAL; | |
297 | } | |
298 | } | |
299 | EXPORT_SYMBOL(generic_ide_ioctl); |