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