Commit | Line | Data |
---|---|---|
2640981f | 1 | /* |
9a186645 DA |
2 | * \file drm_ioc32.c |
3 | * | |
4 | * 32-bit ioctl compatibility routines for the DRM. | |
5 | * | |
6 | * \author Paul Mackerras <paulus@samba.org> | |
7 | * | |
8 | * Copyright (C) Paul Mackerras 2005. | |
9 | * All Rights Reserved. | |
10 | * | |
11 | * Permission is hereby granted, free of charge, to any person obtaining a | |
12 | * copy of this software and associated documentation files (the "Software"), | |
13 | * to deal in the Software without restriction, including without limitation | |
14 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
15 | * and/or sell copies of the Software, and to permit persons to whom the | |
16 | * Software is furnished to do so, subject to the following conditions: | |
17 | * | |
18 | * The above copyright notice and this permission notice (including the next | |
19 | * paragraph) shall be included in all copies or substantial portions of the | |
20 | * Software. | |
21 | * | |
22 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
23 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
24 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
25 | * THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, | |
26 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
27 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS | |
28 | * IN THE SOFTWARE. | |
29 | */ | |
30 | #include <linux/compat.h> | |
cafe8d84 | 31 | #include <linux/ratelimit.h> |
2d1a8a48 | 32 | #include <linux/export.h> |
9a186645 | 33 | |
9f4db449 | 34 | #include <drm/drm_device.h> |
0500c04e SR |
35 | #include <drm/drm_file.h> |
36 | #include <drm/drm_print.h> | |
37 | ||
d6c56613 | 38 | #include "drm_crtc_internal.h" |
0500c04e | 39 | #include "drm_internal.h" |
9a186645 DA |
40 | |
41 | #define DRM_IOCTL_VERSION32 DRM_IOWR(0x00, drm_version32_t) | |
42 | #define DRM_IOCTL_GET_UNIQUE32 DRM_IOWR(0x01, drm_unique32_t) | |
43 | #define DRM_IOCTL_GET_MAP32 DRM_IOWR(0x04, drm_map32_t) | |
44 | #define DRM_IOCTL_GET_CLIENT32 DRM_IOWR(0x05, drm_client32_t) | |
45 | #define DRM_IOCTL_GET_STATS32 DRM_IOR( 0x06, drm_stats32_t) | |
46 | ||
47 | #define DRM_IOCTL_SET_UNIQUE32 DRM_IOW( 0x10, drm_unique32_t) | |
48 | #define DRM_IOCTL_ADD_MAP32 DRM_IOWR(0x15, drm_map32_t) | |
49 | #define DRM_IOCTL_ADD_BUFS32 DRM_IOWR(0x16, drm_buf_desc32_t) | |
50 | #define DRM_IOCTL_MARK_BUFS32 DRM_IOW( 0x17, drm_buf_desc32_t) | |
51 | #define DRM_IOCTL_INFO_BUFS32 DRM_IOWR(0x18, drm_buf_info32_t) | |
52 | #define DRM_IOCTL_MAP_BUFS32 DRM_IOWR(0x19, drm_buf_map32_t) | |
53 | #define DRM_IOCTL_FREE_BUFS32 DRM_IOW( 0x1a, drm_buf_free32_t) | |
54 | ||
55 | #define DRM_IOCTL_RM_MAP32 DRM_IOW( 0x1b, drm_map32_t) | |
56 | ||
57 | #define DRM_IOCTL_SET_SAREA_CTX32 DRM_IOW( 0x1c, drm_ctx_priv_map32_t) | |
58 | #define DRM_IOCTL_GET_SAREA_CTX32 DRM_IOWR(0x1d, drm_ctx_priv_map32_t) | |
59 | ||
60 | #define DRM_IOCTL_RES_CTX32 DRM_IOWR(0x26, drm_ctx_res32_t) | |
61 | #define DRM_IOCTL_DMA32 DRM_IOWR(0x29, drm_dma32_t) | |
62 | ||
63 | #define DRM_IOCTL_AGP_ENABLE32 DRM_IOW( 0x32, drm_agp_mode32_t) | |
64 | #define DRM_IOCTL_AGP_INFO32 DRM_IOR( 0x33, drm_agp_info32_t) | |
65 | #define DRM_IOCTL_AGP_ALLOC32 DRM_IOWR(0x34, drm_agp_buffer32_t) | |
66 | #define DRM_IOCTL_AGP_FREE32 DRM_IOW( 0x35, drm_agp_buffer32_t) | |
67 | #define DRM_IOCTL_AGP_BIND32 DRM_IOW( 0x36, drm_agp_binding32_t) | |
68 | #define DRM_IOCTL_AGP_UNBIND32 DRM_IOW( 0x37, drm_agp_binding32_t) | |
69 | ||
70 | #define DRM_IOCTL_SG_ALLOC32 DRM_IOW( 0x38, drm_scatter_gather32_t) | |
71 | #define DRM_IOCTL_SG_FREE32 DRM_IOW( 0x39, drm_scatter_gather32_t) | |
72 | ||
49568873 EA |
73 | #define DRM_IOCTL_UPDATE_DRAW32 DRM_IOW( 0x3f, drm_update_draw32_t) |
74 | ||
9a186645 DA |
75 | #define DRM_IOCTL_WAIT_VBLANK32 DRM_IOWR(0x3a, drm_wait_vblank32_t) |
76 | ||
c631d5f9 TU |
77 | #define DRM_IOCTL_MODE_ADDFB232 DRM_IOWR(0xb8, drm_mode_fb_cmd232_t) |
78 | ||
9a186645 | 79 | typedef struct drm_version_32 { |
2640981f DV |
80 | int version_major; /* Major version */ |
81 | int version_minor; /* Minor version */ | |
82 | int version_patchlevel; /* Patch level */ | |
83 | u32 name_len; /* Length of name buffer */ | |
84 | u32 name; /* Name of driver */ | |
85 | u32 date_len; /* Length of date buffer */ | |
86 | u32 date; /* User-space buffer to hold date */ | |
87 | u32 desc_len; /* Length of desc buffer */ | |
88 | u32 desc; /* User-space buffer to hold desc */ | |
9a186645 DA |
89 | } drm_version32_t; |
90 | ||
91 | static int compat_drm_version(struct file *file, unsigned int cmd, | |
92 | unsigned long arg) | |
93 | { | |
94 | drm_version32_t v32; | |
012c6741 | 95 | struct drm_version v; |
9a186645 DA |
96 | int err; |
97 | ||
b5e89ed5 | 98 | if (copy_from_user(&v32, (void __user *)arg, sizeof(v32))) |
9a186645 DA |
99 | return -EFAULT; |
100 | ||
e926c474 DV |
101 | memset(&v, 0, sizeof(v)); |
102 | ||
012c6741 AV |
103 | v = (struct drm_version) { |
104 | .name_len = v32.name_len, | |
105 | .name = compat_ptr(v32.name), | |
106 | .date_len = v32.date_len, | |
107 | .date = compat_ptr(v32.date), | |
108 | .desc_len = v32.desc_len, | |
109 | .desc = compat_ptr(v32.desc), | |
110 | }; | |
111 | err = drm_ioctl_kernel(file, drm_version, &v, | |
75426367 | 112 | DRM_RENDER_ALLOW); |
9a186645 DA |
113 | if (err) |
114 | return err; | |
115 | ||
012c6741 AV |
116 | v32.version_major = v.version_major; |
117 | v32.version_minor = v.version_minor; | |
118 | v32.version_patchlevel = v.version_patchlevel; | |
266530b3 JC |
119 | v32.name_len = v.name_len; |
120 | v32.date_len = v.date_len; | |
121 | v32.desc_len = v.desc_len; | |
b5e89ed5 | 122 | if (copy_to_user((void __user *)arg, &v32, sizeof(v32))) |
9a186645 DA |
123 | return -EFAULT; |
124 | return 0; | |
125 | } | |
126 | ||
127 | typedef struct drm_unique32 { | |
2640981f DV |
128 | u32 unique_len; /* Length of unique */ |
129 | u32 unique; /* Unique name for driver instantiation */ | |
9a186645 DA |
130 | } drm_unique32_t; |
131 | ||
132 | static int compat_drm_getunique(struct file *file, unsigned int cmd, | |
133 | unsigned long arg) | |
134 | { | |
135 | drm_unique32_t uq32; | |
17e3dade | 136 | struct drm_unique uq; |
9a186645 DA |
137 | int err; |
138 | ||
b5e89ed5 | 139 | if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32))) |
9a186645 | 140 | return -EFAULT; |
e926c474 DV |
141 | |
142 | memset(&uq, 0, sizeof(uq)); | |
143 | ||
17e3dade AV |
144 | uq = (struct drm_unique){ |
145 | .unique_len = uq32.unique_len, | |
146 | .unique = compat_ptr(uq32.unique), | |
147 | }; | |
9a186645 | 148 | |
75426367 | 149 | err = drm_ioctl_kernel(file, drm_getunique, &uq, 0); |
9a186645 DA |
150 | if (err) |
151 | return err; | |
152 | ||
17e3dade | 153 | uq32.unique_len = uq.unique_len; |
b5e89ed5 | 154 | if (copy_to_user((void __user *)arg, &uq32, sizeof(uq32))) |
9a186645 DA |
155 | return -EFAULT; |
156 | return 0; | |
157 | } | |
158 | ||
159 | static int compat_drm_setunique(struct file *file, unsigned int cmd, | |
160 | unsigned long arg) | |
161 | { | |
56c275cc AV |
162 | /* it's dead */ |
163 | return -EINVAL; | |
9a186645 DA |
164 | } |
165 | ||
9a186645 | 166 | typedef struct drm_client32 { |
2640981f DV |
167 | int idx; /* Which client desired? */ |
168 | int auth; /* Is client authenticated? */ | |
169 | u32 pid; /* Process ID */ | |
170 | u32 uid; /* User ID */ | |
171 | u32 magic; /* Magic */ | |
172 | u32 iocs; /* Ioctl count */ | |
9a186645 DA |
173 | } drm_client32_t; |
174 | ||
175 | static int compat_drm_getclient(struct file *file, unsigned int cmd, | |
176 | unsigned long arg) | |
177 | { | |
178 | drm_client32_t c32; | |
179 | drm_client32_t __user *argp = (void __user *)arg; | |
9e92662d AV |
180 | struct drm_client client; |
181 | int err; | |
9a186645 | 182 | |
9e92662d | 183 | if (copy_from_user(&c32, argp, sizeof(c32))) |
9a186645 DA |
184 | return -EFAULT; |
185 | ||
e926c474 DV |
186 | memset(&client, 0, sizeof(client)); |
187 | ||
9e92662d | 188 | client.idx = c32.idx; |
9a186645 | 189 | |
75426367 | 190 | err = drm_ioctl_kernel(file, drm_getclient, &client, 0); |
9a186645 DA |
191 | if (err) |
192 | return err; | |
193 | ||
9e92662d AV |
194 | c32.idx = client.idx; |
195 | c32.auth = client.auth; | |
196 | c32.pid = client.pid; | |
197 | c32.uid = client.uid; | |
198 | c32.magic = client.magic; | |
199 | c32.iocs = client.iocs; | |
9a186645 DA |
200 | |
201 | if (copy_to_user(argp, &c32, sizeof(c32))) | |
202 | return -EFAULT; | |
203 | return 0; | |
204 | } | |
205 | ||
206 | typedef struct drm_stats32 { | |
207 | u32 count; | |
208 | struct { | |
209 | u32 value; | |
ff4135ae | 210 | enum drm_stat_type type; |
9a186645 DA |
211 | } data[15]; |
212 | } drm_stats32_t; | |
213 | ||
214 | static int compat_drm_getstats(struct file *file, unsigned int cmd, | |
215 | unsigned long arg) | |
216 | { | |
9a186645 | 217 | drm_stats32_t __user *argp = (void __user *)arg; |
9a186645 | 218 | |
2da9a1a2 | 219 | /* getstats is defunct, just clear */ |
8547ee9d | 220 | if (clear_user(argp, sizeof(drm_stats32_t))) |
9a186645 DA |
221 | return -EFAULT; |
222 | return 0; | |
223 | } | |
224 | ||
9cc73ce2 | 225 | #if defined(CONFIG_X86) |
49568873 EA |
226 | typedef struct drm_update_draw32 { |
227 | drm_drawable_t handle; | |
228 | unsigned int type; | |
229 | unsigned int num; | |
230 | /* 64-bit version has a 32-bit pad here */ | |
231 | u64 data; /**< Pointer */ | |
232 | } __attribute__((packed)) drm_update_draw32_t; | |
233 | ||
234 | static int compat_drm_update_draw(struct file *file, unsigned int cmd, | |
235 | unsigned long arg) | |
236 | { | |
2da9a1a2 DV |
237 | /* update_draw is defunct */ |
238 | return 0; | |
49568873 | 239 | } |
09e40d65 | 240 | #endif |
49568873 | 241 | |
9a186645 | 242 | struct drm_wait_vblank_request32 { |
ff4135ae | 243 | enum drm_vblank_seq_type type; |
9a186645 DA |
244 | unsigned int sequence; |
245 | u32 signal; | |
246 | }; | |
247 | ||
248 | struct drm_wait_vblank_reply32 { | |
ff4135ae | 249 | enum drm_vblank_seq_type type; |
9a186645 DA |
250 | unsigned int sequence; |
251 | s32 tval_sec; | |
252 | s32 tval_usec; | |
253 | }; | |
254 | ||
255 | typedef union drm_wait_vblank32 { | |
256 | struct drm_wait_vblank_request32 request; | |
257 | struct drm_wait_vblank_reply32 reply; | |
258 | } drm_wait_vblank32_t; | |
259 | ||
260 | static int compat_drm_wait_vblank(struct file *file, unsigned int cmd, | |
261 | unsigned long arg) | |
262 | { | |
263 | drm_wait_vblank32_t __user *argp = (void __user *)arg; | |
264 | drm_wait_vblank32_t req32; | |
d5288c88 | 265 | union drm_wait_vblank req; |
9a186645 DA |
266 | int err; |
267 | ||
268 | if (copy_from_user(&req32, argp, sizeof(req32))) | |
269 | return -EFAULT; | |
270 | ||
e926c474 DV |
271 | memset(&req, 0, sizeof(req)); |
272 | ||
d5288c88 AV |
273 | req.request.type = req32.request.type; |
274 | req.request.sequence = req32.request.sequence; | |
275 | req.request.signal = req32.request.signal; | |
2798ffcc | 276 | err = drm_ioctl_kernel(file, drm_wait_vblank_ioctl, &req, 0); |
9a186645 | 277 | |
d5288c88 AV |
278 | req32.reply.type = req.reply.type; |
279 | req32.reply.sequence = req.reply.sequence; | |
280 | req32.reply.tval_sec = req.reply.tval_sec; | |
281 | req32.reply.tval_usec = req.reply.tval_usec; | |
9a186645 DA |
282 | if (copy_to_user(argp, &req32, sizeof(req32))) |
283 | return -EFAULT; | |
284 | ||
fa0b1ef5 | 285 | return err; |
9a186645 DA |
286 | } |
287 | ||
9cc73ce2 | 288 | #if defined(CONFIG_X86) |
c631d5f9 TU |
289 | typedef struct drm_mode_fb_cmd232 { |
290 | u32 fb_id; | |
291 | u32 width; | |
292 | u32 height; | |
293 | u32 pixel_format; | |
294 | u32 flags; | |
295 | u32 handles[4]; | |
296 | u32 pitches[4]; | |
297 | u32 offsets[4]; | |
298 | u64 modifier[4]; | |
299 | } __attribute__((packed)) drm_mode_fb_cmd232_t; | |
300 | ||
301 | static int compat_drm_mode_addfb2(struct file *file, unsigned int cmd, | |
302 | unsigned long arg) | |
303 | { | |
304 | struct drm_mode_fb_cmd232 __user *argp = (void __user *)arg; | |
b87b786b | 305 | struct drm_mode_fb_cmd2 req64; |
c631d5f9 TU |
306 | int err; |
307 | ||
e926c474 DV |
308 | memset(&req64, 0, sizeof(req64)); |
309 | ||
d6c56613 AV |
310 | if (copy_from_user(&req64, argp, |
311 | offsetof(drm_mode_fb_cmd232_t, modifier))) | |
c631d5f9 TU |
312 | return -EFAULT; |
313 | ||
d6c56613 AV |
314 | if (copy_from_user(&req64.modifier, &argp->modifier, |
315 | sizeof(req64.modifier))) | |
c631d5f9 TU |
316 | return -EFAULT; |
317 | ||
75426367 | 318 | err = drm_ioctl_kernel(file, drm_mode_addfb2, &req64, 0); |
c631d5f9 TU |
319 | if (err) |
320 | return err; | |
321 | ||
d6c56613 | 322 | if (put_user(req64.fb_id, &argp->fb_id)) |
c631d5f9 TU |
323 | return -EFAULT; |
324 | ||
325 | return 0; | |
326 | } | |
a988588b | 327 | #endif |
c631d5f9 | 328 | |
9f43e542 AV |
329 | static struct { |
330 | drm_ioctl_compat_t *fn; | |
331 | char *name; | |
332 | } drm_compat_ioctls[] = { | |
ff22ff9e | 333 | #define DRM_IOCTL32_DEF(n, f) [DRM_IOCTL_NR(n##32)] = {.fn = f, .name = #n} |
012c6741 | 334 | DRM_IOCTL32_DEF(DRM_IOCTL_VERSION, compat_drm_version), |
17e3dade | 335 | DRM_IOCTL32_DEF(DRM_IOCTL_GET_UNIQUE, compat_drm_getunique), |
9e92662d | 336 | DRM_IOCTL32_DEF(DRM_IOCTL_GET_CLIENT, compat_drm_getclient), |
8547ee9d | 337 | DRM_IOCTL32_DEF(DRM_IOCTL_GET_STATS, compat_drm_getstats), |
56c275cc | 338 | DRM_IOCTL32_DEF(DRM_IOCTL_SET_UNIQUE, compat_drm_setunique), |
cf8e8658 | 339 | #if defined(CONFIG_X86) |
1a36bf1d | 340 | DRM_IOCTL32_DEF(DRM_IOCTL_UPDATE_DRAW, compat_drm_update_draw), |
09e40d65 | 341 | #endif |
d5288c88 | 342 | DRM_IOCTL32_DEF(DRM_IOCTL_WAIT_VBLANK, compat_drm_wait_vblank), |
cf8e8658 | 343 | #if defined(CONFIG_X86) |
d6c56613 | 344 | DRM_IOCTL32_DEF(DRM_IOCTL_MODE_ADDFB2, compat_drm_mode_addfb2), |
a988588b | 345 | #endif |
9a186645 DA |
346 | }; |
347 | ||
348 | /** | |
2640981f DV |
349 | * drm_compat_ioctl - 32bit IOCTL compatibility handler for DRM drivers |
350 | * @filp: file this ioctl is called on | |
351 | * @cmd: ioctl cmd number | |
352 | * @arg: user argument | |
353 | * | |
354 | * Compatibility handler for 32 bit userspace running on 64 kernels. All actual | |
355 | * IOCTL handling is forwarded to drm_ioctl(), while marshalling structures as | |
356 | * appropriate. Note that this only handles DRM core IOCTLs, if the driver has | |
357 | * botched IOCTL itself, it must handle those by wrapping this function. | |
9a186645 | 358 | * |
2640981f DV |
359 | * Returns: |
360 | * Zero on success, negative error code on failure. | |
9a186645 DA |
361 | */ |
362 | long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) | |
363 | { | |
364 | unsigned int nr = DRM_IOCTL_NR(cmd); | |
88e3cb07 | 365 | struct drm_file *file_priv = filp->private_data; |
723dad97 | 366 | struct drm_device *dev = file_priv->minor->dev; |
9a186645 DA |
367 | drm_ioctl_compat_t *fn; |
368 | int ret; | |
369 | ||
7ffa05e0 IR |
370 | /* Assume that ioctls without an explicit compat routine will just |
371 | * work. This may not always be a good assumption, but it's better | |
372 | * than always failing. | |
373 | */ | |
3d77461e | 374 | if (nr >= ARRAY_SIZE(drm_compat_ioctls)) |
ed8b6704 | 375 | return drm_ioctl(filp, cmd, arg); |
9a186645 | 376 | |
9f43e542 AV |
377 | fn = drm_compat_ioctls[nr].fn; |
378 | if (!fn) | |
379 | return drm_ioctl(filp, cmd, arg); | |
9a186645 | 380 | |
723dad97 TU |
381 | drm_dbg_core(dev, "comm=\"%s\", pid=%d, dev=0x%lx, auth=%d, %s\n", |
382 | current->comm, task_pid_nr(current), | |
383 | (long)old_encode_dev(file_priv->minor->kdev->devt), | |
384 | file_priv->authenticated, | |
385 | drm_compat_ioctls[nr].name); | |
88e3cb07 AV |
386 | ret = (*fn)(filp, cmd, arg); |
387 | if (ret) | |
723dad97 | 388 | drm_dbg_core(dev, "ret = %d\n", ret); |
9a186645 DA |
389 | return ret; |
390 | } | |
391 | EXPORT_SYMBOL(drm_compat_ioctl); |