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1/*
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>
31#include <linux/ratelimit.h>
32#include <linux/export.h>
33
34#include <drm/drm_device.h>
35#include <drm/drm_file.h>
36#include <drm/drm_print.h>
37
38#include "drm_crtc_internal.h"
39#include "drm_internal.h"
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
73#define DRM_IOCTL_UPDATE_DRAW32 DRM_IOW( 0x3f, drm_update_draw32_t)
74
75#define DRM_IOCTL_WAIT_VBLANK32 DRM_IOWR(0x3a, drm_wait_vblank32_t)
76
77#define DRM_IOCTL_MODE_ADDFB232 DRM_IOWR(0xb8, drm_mode_fb_cmd232_t)
78
79typedef struct drm_version_32 {
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 */
89} drm_version32_t;
90
91static int compat_drm_version(struct file *file, unsigned int cmd,
92 unsigned long arg)
93{
94 drm_version32_t v32;
95 struct drm_version v;
96 int err;
97
98 if (copy_from_user(&v32, (void __user *)arg, sizeof(v32)))
99 return -EFAULT;
100
101 memset(&v, 0, sizeof(v));
102
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,
112 DRM_RENDER_ALLOW);
113 if (err)
114 return err;
115
116 v32.version_major = v.version_major;
117 v32.version_minor = v.version_minor;
118 v32.version_patchlevel = v.version_patchlevel;
119 v32.name_len = v.name_len;
120 v32.date_len = v.date_len;
121 v32.desc_len = v.desc_len;
122 if (copy_to_user((void __user *)arg, &v32, sizeof(v32)))
123 return -EFAULT;
124 return 0;
125}
126
127typedef struct drm_unique32 {
128 u32 unique_len; /* Length of unique */
129 u32 unique; /* Unique name for driver instantiation */
130} drm_unique32_t;
131
132static int compat_drm_getunique(struct file *file, unsigned int cmd,
133 unsigned long arg)
134{
135 drm_unique32_t uq32;
136 struct drm_unique uq;
137 int err;
138
139 if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32)))
140 return -EFAULT;
141
142 memset(&uq, 0, sizeof(uq));
143
144 uq = (struct drm_unique){
145 .unique_len = uq32.unique_len,
146 .unique = compat_ptr(uq32.unique),
147 };
148
149 err = drm_ioctl_kernel(file, drm_getunique, &uq, 0);
150 if (err)
151 return err;
152
153 uq32.unique_len = uq.unique_len;
154 if (copy_to_user((void __user *)arg, &uq32, sizeof(uq32)))
155 return -EFAULT;
156 return 0;
157}
158
159static int compat_drm_setunique(struct file *file, unsigned int cmd,
160 unsigned long arg)
161{
162 /* it's dead */
163 return -EINVAL;
164}
165
166typedef struct drm_client32 {
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 */
173} drm_client32_t;
174
175static 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;
180 struct drm_client client;
181 int err;
182
183 if (copy_from_user(&c32, argp, sizeof(c32)))
184 return -EFAULT;
185
186 memset(&client, 0, sizeof(client));
187
188 client.idx = c32.idx;
189
190 err = drm_ioctl_kernel(file, drm_getclient, &client, 0);
191 if (err)
192 return err;
193
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;
200
201 if (copy_to_user(argp, &c32, sizeof(c32)))
202 return -EFAULT;
203 return 0;
204}
205
206typedef struct drm_stats32 {
207 u32 count;
208 struct {
209 u32 value;
210 enum drm_stat_type type;
211 } data[15];
212} drm_stats32_t;
213
214static int compat_drm_getstats(struct file *file, unsigned int cmd,
215 unsigned long arg)
216{
217 drm_stats32_t __user *argp = (void __user *)arg;
218
219 /* getstats is defunct, just clear */
220 if (clear_user(argp, sizeof(drm_stats32_t)))
221 return -EFAULT;
222 return 0;
223}
224
225#if defined(CONFIG_X86)
226typedef 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
234static int compat_drm_update_draw(struct file *file, unsigned int cmd,
235 unsigned long arg)
236{
237 /* update_draw is defunct */
238 return 0;
239}
240#endif
241
242struct drm_wait_vblank_request32 {
243 enum drm_vblank_seq_type type;
244 unsigned int sequence;
245 u32 signal;
246};
247
248struct drm_wait_vblank_reply32 {
249 enum drm_vblank_seq_type type;
250 unsigned int sequence;
251 s32 tval_sec;
252 s32 tval_usec;
253};
254
255typedef union drm_wait_vblank32 {
256 struct drm_wait_vblank_request32 request;
257 struct drm_wait_vblank_reply32 reply;
258} drm_wait_vblank32_t;
259
260static 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;
265 union drm_wait_vblank req;
266 int err;
267
268 if (copy_from_user(&req32, argp, sizeof(req32)))
269 return -EFAULT;
270
271 memset(&req, 0, sizeof(req));
272
273 req.request.type = req32.request.type;
274 req.request.sequence = req32.request.sequence;
275 req.request.signal = req32.request.signal;
276 err = drm_ioctl_kernel(file, drm_wait_vblank_ioctl, &req, 0);
277
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;
282 if (copy_to_user(argp, &req32, sizeof(req32)))
283 return -EFAULT;
284
285 return err;
286}
287
288#if defined(CONFIG_X86)
289typedef 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
301static 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;
305 struct drm_mode_fb_cmd2 req64;
306 int err;
307
308 memset(&req64, 0, sizeof(req64));
309
310 if (copy_from_user(&req64, argp,
311 offsetof(drm_mode_fb_cmd232_t, modifier)))
312 return -EFAULT;
313
314 if (copy_from_user(&req64.modifier, &argp->modifier,
315 sizeof(req64.modifier)))
316 return -EFAULT;
317
318 err = drm_ioctl_kernel(file, drm_mode_addfb2, &req64, 0);
319 if (err)
320 return err;
321
322 if (put_user(req64.fb_id, &argp->fb_id))
323 return -EFAULT;
324
325 return 0;
326}
327#endif
328
329static struct {
330 drm_ioctl_compat_t *fn;
331 char *name;
332} drm_compat_ioctls[] = {
333#define DRM_IOCTL32_DEF(n, f) [DRM_IOCTL_NR(n##32)] = {.fn = f, .name = #n}
334 DRM_IOCTL32_DEF(DRM_IOCTL_VERSION, compat_drm_version),
335 DRM_IOCTL32_DEF(DRM_IOCTL_GET_UNIQUE, compat_drm_getunique),
336 DRM_IOCTL32_DEF(DRM_IOCTL_GET_CLIENT, compat_drm_getclient),
337 DRM_IOCTL32_DEF(DRM_IOCTL_GET_STATS, compat_drm_getstats),
338 DRM_IOCTL32_DEF(DRM_IOCTL_SET_UNIQUE, compat_drm_setunique),
339#if defined(CONFIG_X86)
340 DRM_IOCTL32_DEF(DRM_IOCTL_UPDATE_DRAW, compat_drm_update_draw),
341#endif
342 DRM_IOCTL32_DEF(DRM_IOCTL_WAIT_VBLANK, compat_drm_wait_vblank),
343#if defined(CONFIG_X86)
344 DRM_IOCTL32_DEF(DRM_IOCTL_MODE_ADDFB2, compat_drm_mode_addfb2),
345#endif
346};
347
348/**
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.
358 *
359 * Returns:
360 * Zero on success, negative error code on failure.
361 */
362long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
363{
364 unsigned int nr = DRM_IOCTL_NR(cmd);
365 struct drm_file *file_priv = filp->private_data;
366 struct drm_device *dev = file_priv->minor->dev;
367 drm_ioctl_compat_t *fn;
368 int ret;
369
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 */
374 if (nr >= ARRAY_SIZE(drm_compat_ioctls))
375 return drm_ioctl(filp, cmd, arg);
376
377 fn = drm_compat_ioctls[nr].fn;
378 if (!fn)
379 return drm_ioctl(filp, cmd, arg);
380
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);
386 ret = (*fn)(filp, cmd, arg);
387 if (ret)
388 drm_dbg_core(dev, "ret = %d\n", ret);
389 return ret;
390}
391EXPORT_SYMBOL(drm_compat_ioctl);
1/*
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>
31#include <linux/ratelimit.h>
32#include <linux/export.h>
33
34#include <drm/drmP.h>
35#include "drm_legacy.h"
36#include "drm_internal.h"
37#include "drm_crtc_internal.h"
38
39#define DRM_IOCTL_VERSION32 DRM_IOWR(0x00, drm_version32_t)
40#define DRM_IOCTL_GET_UNIQUE32 DRM_IOWR(0x01, drm_unique32_t)
41#define DRM_IOCTL_GET_MAP32 DRM_IOWR(0x04, drm_map32_t)
42#define DRM_IOCTL_GET_CLIENT32 DRM_IOWR(0x05, drm_client32_t)
43#define DRM_IOCTL_GET_STATS32 DRM_IOR( 0x06, drm_stats32_t)
44
45#define DRM_IOCTL_SET_UNIQUE32 DRM_IOW( 0x10, drm_unique32_t)
46#define DRM_IOCTL_ADD_MAP32 DRM_IOWR(0x15, drm_map32_t)
47#define DRM_IOCTL_ADD_BUFS32 DRM_IOWR(0x16, drm_buf_desc32_t)
48#define DRM_IOCTL_MARK_BUFS32 DRM_IOW( 0x17, drm_buf_desc32_t)
49#define DRM_IOCTL_INFO_BUFS32 DRM_IOWR(0x18, drm_buf_info32_t)
50#define DRM_IOCTL_MAP_BUFS32 DRM_IOWR(0x19, drm_buf_map32_t)
51#define DRM_IOCTL_FREE_BUFS32 DRM_IOW( 0x1a, drm_buf_free32_t)
52
53#define DRM_IOCTL_RM_MAP32 DRM_IOW( 0x1b, drm_map32_t)
54
55#define DRM_IOCTL_SET_SAREA_CTX32 DRM_IOW( 0x1c, drm_ctx_priv_map32_t)
56#define DRM_IOCTL_GET_SAREA_CTX32 DRM_IOWR(0x1d, drm_ctx_priv_map32_t)
57
58#define DRM_IOCTL_RES_CTX32 DRM_IOWR(0x26, drm_ctx_res32_t)
59#define DRM_IOCTL_DMA32 DRM_IOWR(0x29, drm_dma32_t)
60
61#define DRM_IOCTL_AGP_ENABLE32 DRM_IOW( 0x32, drm_agp_mode32_t)
62#define DRM_IOCTL_AGP_INFO32 DRM_IOR( 0x33, drm_agp_info32_t)
63#define DRM_IOCTL_AGP_ALLOC32 DRM_IOWR(0x34, drm_agp_buffer32_t)
64#define DRM_IOCTL_AGP_FREE32 DRM_IOW( 0x35, drm_agp_buffer32_t)
65#define DRM_IOCTL_AGP_BIND32 DRM_IOW( 0x36, drm_agp_binding32_t)
66#define DRM_IOCTL_AGP_UNBIND32 DRM_IOW( 0x37, drm_agp_binding32_t)
67
68#define DRM_IOCTL_SG_ALLOC32 DRM_IOW( 0x38, drm_scatter_gather32_t)
69#define DRM_IOCTL_SG_FREE32 DRM_IOW( 0x39, drm_scatter_gather32_t)
70
71#define DRM_IOCTL_UPDATE_DRAW32 DRM_IOW( 0x3f, drm_update_draw32_t)
72
73#define DRM_IOCTL_WAIT_VBLANK32 DRM_IOWR(0x3a, drm_wait_vblank32_t)
74
75#define DRM_IOCTL_MODE_ADDFB232 DRM_IOWR(0xb8, drm_mode_fb_cmd232_t)
76
77typedef struct drm_version_32 {
78 int version_major; /* Major version */
79 int version_minor; /* Minor version */
80 int version_patchlevel; /* Patch level */
81 u32 name_len; /* Length of name buffer */
82 u32 name; /* Name of driver */
83 u32 date_len; /* Length of date buffer */
84 u32 date; /* User-space buffer to hold date */
85 u32 desc_len; /* Length of desc buffer */
86 u32 desc; /* User-space buffer to hold desc */
87} drm_version32_t;
88
89static int compat_drm_version(struct file *file, unsigned int cmd,
90 unsigned long arg)
91{
92 drm_version32_t v32;
93 struct drm_version v;
94 int err;
95
96 if (copy_from_user(&v32, (void __user *)arg, sizeof(v32)))
97 return -EFAULT;
98
99 v = (struct drm_version) {
100 .name_len = v32.name_len,
101 .name = compat_ptr(v32.name),
102 .date_len = v32.date_len,
103 .date = compat_ptr(v32.date),
104 .desc_len = v32.desc_len,
105 .desc = compat_ptr(v32.desc),
106 };
107 err = drm_ioctl_kernel(file, drm_version, &v,
108 DRM_UNLOCKED|DRM_RENDER_ALLOW|DRM_CONTROL_ALLOW);
109 if (err)
110 return err;
111
112 v32.version_major = v.version_major;
113 v32.version_minor = v.version_minor;
114 v32.version_patchlevel = v.version_patchlevel;
115 v32.name_len = v.name_len;
116 v32.date_len = v.date_len;
117 v32.desc_len = v.desc_len;
118 if (copy_to_user((void __user *)arg, &v32, sizeof(v32)))
119 return -EFAULT;
120 return 0;
121}
122
123typedef struct drm_unique32 {
124 u32 unique_len; /* Length of unique */
125 u32 unique; /* Unique name for driver instantiation */
126} drm_unique32_t;
127
128static int compat_drm_getunique(struct file *file, unsigned int cmd,
129 unsigned long arg)
130{
131 drm_unique32_t uq32;
132 struct drm_unique uq;
133 int err;
134
135 if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32)))
136 return -EFAULT;
137 uq = (struct drm_unique){
138 .unique_len = uq32.unique_len,
139 .unique = compat_ptr(uq32.unique),
140 };
141
142 err = drm_ioctl_kernel(file, drm_getunique, &uq, DRM_UNLOCKED);
143 if (err)
144 return err;
145
146 uq32.unique_len = uq.unique_len;
147 if (copy_to_user((void __user *)arg, &uq32, sizeof(uq32)))
148 return -EFAULT;
149 return 0;
150}
151
152static int compat_drm_setunique(struct file *file, unsigned int cmd,
153 unsigned long arg)
154{
155 /* it's dead */
156 return -EINVAL;
157}
158
159typedef struct drm_map32 {
160 u32 offset; /* Requested physical address (0 for SAREA) */
161 u32 size; /* Requested physical size (bytes) */
162 enum drm_map_type type; /* Type of memory to map */
163 enum drm_map_flags flags; /* Flags */
164 u32 handle; /* User-space: "Handle" to pass to mmap() */
165 int mtrr; /* MTRR slot used */
166} drm_map32_t;
167
168static int compat_drm_getmap(struct file *file, unsigned int cmd,
169 unsigned long arg)
170{
171 drm_map32_t __user *argp = (void __user *)arg;
172 drm_map32_t m32;
173 struct drm_map map;
174 int err;
175
176 if (copy_from_user(&m32, argp, sizeof(m32)))
177 return -EFAULT;
178
179 map.offset = m32.offset;
180 err = drm_ioctl_kernel(file, drm_legacy_getmap_ioctl, &map, DRM_UNLOCKED);
181 if (err)
182 return err;
183
184 m32.offset = map.offset;
185 m32.size = map.size;
186 m32.type = map.type;
187 m32.flags = map.flags;
188 m32.handle = ptr_to_compat(map.handle);
189 m32.mtrr = map.mtrr;
190 if (copy_to_user(argp, &m32, sizeof(m32)))
191 return -EFAULT;
192 return 0;
193
194}
195
196static int compat_drm_addmap(struct file *file, unsigned int cmd,
197 unsigned long arg)
198{
199 drm_map32_t __user *argp = (void __user *)arg;
200 drm_map32_t m32;
201 struct drm_map map;
202 int err;
203
204 if (copy_from_user(&m32, argp, sizeof(m32)))
205 return -EFAULT;
206
207 map.offset = m32.offset;
208 map.size = m32.size;
209 map.type = m32.type;
210 map.flags = m32.flags;
211
212 err = drm_ioctl_kernel(file, drm_legacy_addmap_ioctl, &map,
213 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
214 if (err)
215 return err;
216
217 m32.offset = map.offset;
218 m32.mtrr = map.mtrr;
219 m32.handle = ptr_to_compat(map.handle);
220 if (map.handle != compat_ptr(m32.handle))
221 pr_err_ratelimited("compat_drm_addmap truncated handle %p for type %d offset %x\n",
222 map.handle, m32.type, m32.offset);
223
224 if (copy_to_user(argp, &m32, sizeof(m32)))
225 return -EFAULT;
226
227 return 0;
228}
229
230static int compat_drm_rmmap(struct file *file, unsigned int cmd,
231 unsigned long arg)
232{
233 drm_map32_t __user *argp = (void __user *)arg;
234 struct drm_map map;
235 u32 handle;
236
237 if (get_user(handle, &argp->handle))
238 return -EFAULT;
239 map.handle = compat_ptr(handle);
240 return drm_ioctl_kernel(file, drm_legacy_rmmap_ioctl, &map, DRM_AUTH);
241}
242
243typedef struct drm_client32 {
244 int idx; /* Which client desired? */
245 int auth; /* Is client authenticated? */
246 u32 pid; /* Process ID */
247 u32 uid; /* User ID */
248 u32 magic; /* Magic */
249 u32 iocs; /* Ioctl count */
250} drm_client32_t;
251
252static int compat_drm_getclient(struct file *file, unsigned int cmd,
253 unsigned long arg)
254{
255 drm_client32_t c32;
256 drm_client32_t __user *argp = (void __user *)arg;
257 struct drm_client client;
258 int err;
259
260 if (copy_from_user(&c32, argp, sizeof(c32)))
261 return -EFAULT;
262
263 client.idx = c32.idx;
264
265 err = drm_ioctl_kernel(file, drm_getclient, &client, DRM_UNLOCKED);
266 if (err)
267 return err;
268
269 c32.idx = client.idx;
270 c32.auth = client.auth;
271 c32.pid = client.pid;
272 c32.uid = client.uid;
273 c32.magic = client.magic;
274 c32.iocs = client.iocs;
275
276 if (copy_to_user(argp, &c32, sizeof(c32)))
277 return -EFAULT;
278 return 0;
279}
280
281typedef struct drm_stats32 {
282 u32 count;
283 struct {
284 u32 value;
285 enum drm_stat_type type;
286 } data[15];
287} drm_stats32_t;
288
289static int compat_drm_getstats(struct file *file, unsigned int cmd,
290 unsigned long arg)
291{
292 drm_stats32_t __user *argp = (void __user *)arg;
293 int err;
294
295 err = drm_ioctl_kernel(file, drm_noop, NULL, DRM_UNLOCKED);
296 if (err)
297 return err;
298
299 if (clear_user(argp, sizeof(drm_stats32_t)))
300 return -EFAULT;
301 return 0;
302}
303
304typedef struct drm_buf_desc32 {
305 int count; /* Number of buffers of this size */
306 int size; /* Size in bytes */
307 int low_mark; /* Low water mark */
308 int high_mark; /* High water mark */
309 int flags;
310 u32 agp_start; /* Start address in the AGP aperture */
311} drm_buf_desc32_t;
312
313static int compat_drm_addbufs(struct file *file, unsigned int cmd,
314 unsigned long arg)
315{
316 drm_buf_desc32_t __user *argp = (void __user *)arg;
317 drm_buf_desc32_t desc32;
318 struct drm_buf_desc desc;
319 int err;
320
321 if (copy_from_user(&desc32, argp, sizeof(drm_buf_desc32_t)))
322 return -EFAULT;
323
324 desc = (struct drm_buf_desc){
325 desc32.count, desc32.size, desc32.low_mark, desc32.high_mark,
326 desc32.flags, desc32.agp_start
327 };
328
329 err = drm_ioctl_kernel(file, drm_legacy_addbufs, &desc,
330 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
331 if (err)
332 return err;
333
334 desc32 = (drm_buf_desc32_t){
335 desc.count, desc.size, desc.low_mark, desc.high_mark,
336 desc.flags, desc.agp_start
337 };
338 if (copy_to_user(argp, &desc32, sizeof(drm_buf_desc32_t)))
339 return -EFAULT;
340
341 return 0;
342}
343
344static int compat_drm_markbufs(struct file *file, unsigned int cmd,
345 unsigned long arg)
346{
347 drm_buf_desc32_t b32;
348 drm_buf_desc32_t __user *argp = (void __user *)arg;
349 struct drm_buf_desc buf;
350
351 if (copy_from_user(&b32, argp, sizeof(b32)))
352 return -EFAULT;
353
354 buf.size = b32.size;
355 buf.low_mark = b32.low_mark;
356 buf.high_mark = b32.high_mark;
357
358 return drm_ioctl_kernel(file, drm_legacy_markbufs, &buf,
359 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
360}
361
362typedef struct drm_buf_info32 {
363 int count; /**< Entries in list */
364 u32 list;
365} drm_buf_info32_t;
366
367static int copy_one_buf32(void *data, int count, struct drm_buf_entry *from)
368{
369 drm_buf_info32_t *request = data;
370 drm_buf_desc32_t __user *to = compat_ptr(request->list);
371 drm_buf_desc32_t v = {.count = from->buf_count,
372 .size = from->buf_size,
373 .low_mark = from->low_mark,
374 .high_mark = from->high_mark};
375 return copy_to_user(to + count, &v, offsetof(drm_buf_desc32_t, flags));
376}
377
378static int drm_legacy_infobufs32(struct drm_device *dev, void *data,
379 struct drm_file *file_priv)
380{
381 drm_buf_info32_t *request = data;
382 return __drm_legacy_infobufs(dev, data, &request->count, copy_one_buf32);
383}
384
385static int compat_drm_infobufs(struct file *file, unsigned int cmd,
386 unsigned long arg)
387{
388 drm_buf_info32_t req32;
389 drm_buf_info32_t __user *argp = (void __user *)arg;
390 int err;
391
392 if (copy_from_user(&req32, argp, sizeof(req32)))
393 return -EFAULT;
394
395 if (req32.count < 0)
396 req32.count = 0;
397
398 err = drm_ioctl_kernel(file, drm_legacy_infobufs32, &req32, DRM_AUTH);
399 if (err)
400 return err;
401
402 if (put_user(req32.count, &argp->count))
403 return -EFAULT;
404
405 return 0;
406}
407
408typedef struct drm_buf_pub32 {
409 int idx; /**< Index into the master buffer list */
410 int total; /**< Buffer size */
411 int used; /**< Amount of buffer in use (for DMA) */
412 u32 address; /**< Address of buffer */
413} drm_buf_pub32_t;
414
415typedef struct drm_buf_map32 {
416 int count; /**< Length of the buffer list */
417 u32 virtual; /**< Mmap'd area in user-virtual */
418 u32 list; /**< Buffer information */
419} drm_buf_map32_t;
420
421static int map_one_buf32(void *data, int idx, unsigned long virtual,
422 struct drm_buf *buf)
423{
424 drm_buf_map32_t *request = data;
425 drm_buf_pub32_t __user *to = compat_ptr(request->list) + idx;
426 drm_buf_pub32_t v;
427
428 v.idx = buf->idx;
429 v.total = buf->total;
430 v.used = 0;
431 v.address = virtual + buf->offset;
432 if (copy_to_user(to, &v, sizeof(v)))
433 return -EFAULT;
434 return 0;
435}
436
437static int drm_legacy_mapbufs32(struct drm_device *dev, void *data,
438 struct drm_file *file_priv)
439{
440 drm_buf_map32_t *request = data;
441 void __user *v;
442 int err = __drm_legacy_mapbufs(dev, data, &request->count,
443 &v, map_one_buf32,
444 file_priv);
445 request->virtual = ptr_to_compat(v);
446 return err;
447}
448
449static int compat_drm_mapbufs(struct file *file, unsigned int cmd,
450 unsigned long arg)
451{
452 drm_buf_map32_t __user *argp = (void __user *)arg;
453 drm_buf_map32_t req32;
454 int err;
455
456 if (copy_from_user(&req32, argp, sizeof(req32)))
457 return -EFAULT;
458 if (req32.count < 0)
459 return -EINVAL;
460
461 err = drm_ioctl_kernel(file, drm_legacy_mapbufs32, &req32, DRM_AUTH);
462 if (err)
463 return err;
464
465 if (put_user(req32.count, &argp->count)
466 || put_user(req32.virtual, &argp->virtual))
467 return -EFAULT;
468
469 return 0;
470}
471
472typedef struct drm_buf_free32 {
473 int count;
474 u32 list;
475} drm_buf_free32_t;
476
477static int compat_drm_freebufs(struct file *file, unsigned int cmd,
478 unsigned long arg)
479{
480 drm_buf_free32_t req32;
481 struct drm_buf_free request;
482 drm_buf_free32_t __user *argp = (void __user *)arg;
483
484 if (copy_from_user(&req32, argp, sizeof(req32)))
485 return -EFAULT;
486
487 request.count = req32.count;
488 request.list = compat_ptr(req32.list);
489 return drm_ioctl_kernel(file, drm_legacy_freebufs, &request, DRM_AUTH);
490}
491
492typedef struct drm_ctx_priv_map32 {
493 unsigned int ctx_id; /**< Context requesting private mapping */
494 u32 handle; /**< Handle of map */
495} drm_ctx_priv_map32_t;
496
497static int compat_drm_setsareactx(struct file *file, unsigned int cmd,
498 unsigned long arg)
499{
500 drm_ctx_priv_map32_t req32;
501 struct drm_ctx_priv_map request;
502 drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
503
504 if (copy_from_user(&req32, argp, sizeof(req32)))
505 return -EFAULT;
506
507 request.ctx_id = req32.ctx_id;
508 request.handle = compat_ptr(req32.handle);
509 return drm_ioctl_kernel(file, drm_legacy_setsareactx, &request,
510 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
511}
512
513static int compat_drm_getsareactx(struct file *file, unsigned int cmd,
514 unsigned long arg)
515{
516 struct drm_ctx_priv_map req;
517 drm_ctx_priv_map32_t req32;
518 drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
519 int err;
520
521 if (copy_from_user(&req32, argp, sizeof(req32)))
522 return -EFAULT;
523
524 req.ctx_id = req32.ctx_id;
525 err = drm_ioctl_kernel(file, drm_legacy_getsareactx, &req, DRM_AUTH);
526 if (err)
527 return err;
528
529 req32.handle = ptr_to_compat(req.handle);
530 if (copy_to_user(argp, &req32, sizeof(req32)))
531 return -EFAULT;
532
533 return 0;
534}
535
536typedef struct drm_ctx_res32 {
537 int count;
538 u32 contexts;
539} drm_ctx_res32_t;
540
541static int compat_drm_resctx(struct file *file, unsigned int cmd,
542 unsigned long arg)
543{
544 drm_ctx_res32_t __user *argp = (void __user *)arg;
545 drm_ctx_res32_t res32;
546 struct drm_ctx_res res;
547 int err;
548
549 if (copy_from_user(&res32, argp, sizeof(res32)))
550 return -EFAULT;
551
552 res.count = res32.count;
553 res.contexts = compat_ptr(res32.contexts);
554 err = drm_ioctl_kernel(file, drm_legacy_resctx, &res, DRM_AUTH);
555 if (err)
556 return err;
557
558 res32.count = res.count;
559 if (copy_to_user(argp, &res32, sizeof(res32)))
560 return -EFAULT;
561
562 return 0;
563}
564
565typedef struct drm_dma32 {
566 int context; /**< Context handle */
567 int send_count; /**< Number of buffers to send */
568 u32 send_indices; /**< List of handles to buffers */
569 u32 send_sizes; /**< Lengths of data to send */
570 enum drm_dma_flags flags; /**< Flags */
571 int request_count; /**< Number of buffers requested */
572 int request_size; /**< Desired size for buffers */
573 u32 request_indices; /**< Buffer information */
574 u32 request_sizes;
575 int granted_count; /**< Number of buffers granted */
576} drm_dma32_t;
577
578static int compat_drm_dma(struct file *file, unsigned int cmd,
579 unsigned long arg)
580{
581 drm_dma32_t d32;
582 drm_dma32_t __user *argp = (void __user *)arg;
583 struct drm_dma d;
584 int err;
585
586 if (copy_from_user(&d32, argp, sizeof(d32)))
587 return -EFAULT;
588
589 d.context = d32.context;
590 d.send_count = d32.send_count;
591 d.send_indices = compat_ptr(d32.send_indices);
592 d.send_sizes = compat_ptr(d32.send_sizes);
593 d.flags = d32.flags;
594 d.request_count = d32.request_count;
595 d.request_indices = compat_ptr(d32.request_indices);
596 d.request_sizes = compat_ptr(d32.request_sizes);
597 err = drm_ioctl_kernel(file, drm_legacy_dma_ioctl, &d, DRM_AUTH);
598 if (err)
599 return err;
600
601 if (put_user(d.request_size, &argp->request_size)
602 || put_user(d.granted_count, &argp->granted_count))
603 return -EFAULT;
604
605 return 0;
606}
607
608#if IS_ENABLED(CONFIG_AGP)
609typedef struct drm_agp_mode32 {
610 u32 mode; /**< AGP mode */
611} drm_agp_mode32_t;
612
613static int compat_drm_agp_enable(struct file *file, unsigned int cmd,
614 unsigned long arg)
615{
616 drm_agp_mode32_t __user *argp = (void __user *)arg;
617 struct drm_agp_mode mode;
618
619 if (get_user(mode.mode, &argp->mode))
620 return -EFAULT;
621
622 return drm_ioctl_kernel(file, drm_agp_enable_ioctl, &mode,
623 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
624}
625
626typedef struct drm_agp_info32 {
627 int agp_version_major;
628 int agp_version_minor;
629 u32 mode;
630 u32 aperture_base; /* physical address */
631 u32 aperture_size; /* bytes */
632 u32 memory_allowed; /* bytes */
633 u32 memory_used;
634
635 /* PCI information */
636 unsigned short id_vendor;
637 unsigned short id_device;
638} drm_agp_info32_t;
639
640static int compat_drm_agp_info(struct file *file, unsigned int cmd,
641 unsigned long arg)
642{
643 drm_agp_info32_t __user *argp = (void __user *)arg;
644 drm_agp_info32_t i32;
645 struct drm_agp_info info;
646 int err;
647
648 err = drm_ioctl_kernel(file, drm_agp_info_ioctl, &info, DRM_AUTH);
649 if (err)
650 return err;
651
652 i32.agp_version_major = info.agp_version_major;
653 i32.agp_version_minor = info.agp_version_minor;
654 i32.mode = info.mode;
655 i32.aperture_base = info.aperture_base;
656 i32.aperture_size = info.aperture_size;
657 i32.memory_allowed = info.memory_allowed;
658 i32.memory_used = info.memory_used;
659 i32.id_vendor = info.id_vendor;
660 i32.id_device = info.id_device;
661 if (copy_to_user(argp, &i32, sizeof(i32)))
662 return -EFAULT;
663
664 return 0;
665}
666
667typedef struct drm_agp_buffer32 {
668 u32 size; /**< In bytes -- will round to page boundary */
669 u32 handle; /**< Used for binding / unbinding */
670 u32 type; /**< Type of memory to allocate */
671 u32 physical; /**< Physical used by i810 */
672} drm_agp_buffer32_t;
673
674static int compat_drm_agp_alloc(struct file *file, unsigned int cmd,
675 unsigned long arg)
676{
677 drm_agp_buffer32_t __user *argp = (void __user *)arg;
678 drm_agp_buffer32_t req32;
679 struct drm_agp_buffer request;
680 int err;
681
682 if (copy_from_user(&req32, argp, sizeof(req32)))
683 return -EFAULT;
684
685 request.size = req32.size;
686 request.type = req32.type;
687 err = drm_ioctl_kernel(file, drm_agp_alloc_ioctl, &request,
688 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
689 if (err)
690 return err;
691
692 req32.handle = request.handle;
693 req32.physical = request.physical;
694 if (copy_to_user(argp, &req32, sizeof(req32))) {
695 drm_ioctl_kernel(file, drm_agp_free_ioctl, &request,
696 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
697 return -EFAULT;
698 }
699
700 return 0;
701}
702
703static int compat_drm_agp_free(struct file *file, unsigned int cmd,
704 unsigned long arg)
705{
706 drm_agp_buffer32_t __user *argp = (void __user *)arg;
707 struct drm_agp_buffer request;
708
709 if (get_user(request.handle, &argp->handle))
710 return -EFAULT;
711
712 return drm_ioctl_kernel(file, drm_agp_free_ioctl, &request,
713 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
714}
715
716typedef struct drm_agp_binding32 {
717 u32 handle; /**< From drm_agp_buffer */
718 u32 offset; /**< In bytes -- will round to page boundary */
719} drm_agp_binding32_t;
720
721static int compat_drm_agp_bind(struct file *file, unsigned int cmd,
722 unsigned long arg)
723{
724 drm_agp_binding32_t __user *argp = (void __user *)arg;
725 drm_agp_binding32_t req32;
726 struct drm_agp_binding request;
727
728 if (copy_from_user(&req32, argp, sizeof(req32)))
729 return -EFAULT;
730
731 request.handle = req32.handle;
732 request.offset = req32.offset;
733 return drm_ioctl_kernel(file, drm_agp_bind_ioctl, &request,
734 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
735}
736
737static int compat_drm_agp_unbind(struct file *file, unsigned int cmd,
738 unsigned long arg)
739{
740 drm_agp_binding32_t __user *argp = (void __user *)arg;
741 struct drm_agp_binding request;
742
743 if (get_user(request.handle, &argp->handle))
744 return -EFAULT;
745
746 return drm_ioctl_kernel(file, drm_agp_unbind_ioctl, &request,
747 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
748}
749#endif /* CONFIG_AGP */
750
751typedef struct drm_scatter_gather32 {
752 u32 size; /**< In bytes -- will round to page boundary */
753 u32 handle; /**< Used for mapping / unmapping */
754} drm_scatter_gather32_t;
755
756static int compat_drm_sg_alloc(struct file *file, unsigned int cmd,
757 unsigned long arg)
758{
759 drm_scatter_gather32_t __user *argp = (void __user *)arg;
760 struct drm_scatter_gather request;
761 int err;
762
763 if (get_user(request.size, &argp->size))
764 return -EFAULT;
765
766 err = drm_ioctl_kernel(file, drm_legacy_sg_alloc, &request,
767 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
768 if (err)
769 return err;
770
771 /* XXX not sure about the handle conversion here... */
772 if (put_user(request.handle >> PAGE_SHIFT, &argp->handle))
773 return -EFAULT;
774
775 return 0;
776}
777
778static int compat_drm_sg_free(struct file *file, unsigned int cmd,
779 unsigned long arg)
780{
781 drm_scatter_gather32_t __user *argp = (void __user *)arg;
782 struct drm_scatter_gather request;
783 unsigned long x;
784
785 if (get_user(x, &argp->handle))
786 return -EFAULT;
787 request.handle = x << PAGE_SHIFT;
788 return drm_ioctl_kernel(file, drm_legacy_sg_free, &request,
789 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
790}
791
792#if defined(CONFIG_X86)
793typedef struct drm_update_draw32 {
794 drm_drawable_t handle;
795 unsigned int type;
796 unsigned int num;
797 /* 64-bit version has a 32-bit pad here */
798 u64 data; /**< Pointer */
799} __attribute__((packed)) drm_update_draw32_t;
800
801static int compat_drm_update_draw(struct file *file, unsigned int cmd,
802 unsigned long arg)
803{
804 drm_update_draw32_t update32;
805 if (copy_from_user(&update32, (void __user *)arg, sizeof(update32)))
806 return -EFAULT;
807
808 return drm_ioctl_kernel(file, drm_noop, NULL,
809 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
810}
811#endif
812
813struct drm_wait_vblank_request32 {
814 enum drm_vblank_seq_type type;
815 unsigned int sequence;
816 u32 signal;
817};
818
819struct drm_wait_vblank_reply32 {
820 enum drm_vblank_seq_type type;
821 unsigned int sequence;
822 s32 tval_sec;
823 s32 tval_usec;
824};
825
826typedef union drm_wait_vblank32 {
827 struct drm_wait_vblank_request32 request;
828 struct drm_wait_vblank_reply32 reply;
829} drm_wait_vblank32_t;
830
831static int compat_drm_wait_vblank(struct file *file, unsigned int cmd,
832 unsigned long arg)
833{
834 drm_wait_vblank32_t __user *argp = (void __user *)arg;
835 drm_wait_vblank32_t req32;
836 union drm_wait_vblank req;
837 int err;
838
839 if (copy_from_user(&req32, argp, sizeof(req32)))
840 return -EFAULT;
841
842 req.request.type = req32.request.type;
843 req.request.sequence = req32.request.sequence;
844 req.request.signal = req32.request.signal;
845 err = drm_ioctl_kernel(file, drm_wait_vblank_ioctl, &req, DRM_UNLOCKED);
846 if (err)
847 return err;
848
849 req32.reply.type = req.reply.type;
850 req32.reply.sequence = req.reply.sequence;
851 req32.reply.tval_sec = req.reply.tval_sec;
852 req32.reply.tval_usec = req.reply.tval_usec;
853 if (copy_to_user(argp, &req32, sizeof(req32)))
854 return -EFAULT;
855
856 return 0;
857}
858
859#if defined(CONFIG_X86)
860typedef struct drm_mode_fb_cmd232 {
861 u32 fb_id;
862 u32 width;
863 u32 height;
864 u32 pixel_format;
865 u32 flags;
866 u32 handles[4];
867 u32 pitches[4];
868 u32 offsets[4];
869 u64 modifier[4];
870} __attribute__((packed)) drm_mode_fb_cmd232_t;
871
872static int compat_drm_mode_addfb2(struct file *file, unsigned int cmd,
873 unsigned long arg)
874{
875 struct drm_mode_fb_cmd232 __user *argp = (void __user *)arg;
876 struct drm_mode_fb_cmd2 req64;
877 int err;
878
879 if (copy_from_user(&req64, argp,
880 offsetof(drm_mode_fb_cmd232_t, modifier)))
881 return -EFAULT;
882
883 if (copy_from_user(&req64.modifier, &argp->modifier,
884 sizeof(req64.modifier)))
885 return -EFAULT;
886
887 err = drm_ioctl_kernel(file, drm_mode_addfb2, &req64,
888 DRM_CONTROL_ALLOW|DRM_UNLOCKED);
889 if (err)
890 return err;
891
892 if (put_user(req64.fb_id, &argp->fb_id))
893 return -EFAULT;
894
895 return 0;
896}
897#endif
898
899static struct {
900 drm_ioctl_compat_t *fn;
901 char *name;
902} drm_compat_ioctls[] = {
903#define DRM_IOCTL32_DEF(n, f) [DRM_IOCTL_NR(n##32)] = {.fn = f, .name = #n}
904 DRM_IOCTL32_DEF(DRM_IOCTL_VERSION, compat_drm_version),
905 DRM_IOCTL32_DEF(DRM_IOCTL_GET_UNIQUE, compat_drm_getunique),
906 DRM_IOCTL32_DEF(DRM_IOCTL_GET_MAP, compat_drm_getmap),
907 DRM_IOCTL32_DEF(DRM_IOCTL_GET_CLIENT, compat_drm_getclient),
908 DRM_IOCTL32_DEF(DRM_IOCTL_GET_STATS, compat_drm_getstats),
909 DRM_IOCTL32_DEF(DRM_IOCTL_SET_UNIQUE, compat_drm_setunique),
910 DRM_IOCTL32_DEF(DRM_IOCTL_ADD_MAP, compat_drm_addmap),
911 DRM_IOCTL32_DEF(DRM_IOCTL_ADD_BUFS, compat_drm_addbufs),
912 DRM_IOCTL32_DEF(DRM_IOCTL_MARK_BUFS, compat_drm_markbufs),
913 DRM_IOCTL32_DEF(DRM_IOCTL_INFO_BUFS, compat_drm_infobufs),
914 DRM_IOCTL32_DEF(DRM_IOCTL_MAP_BUFS, compat_drm_mapbufs),
915 DRM_IOCTL32_DEF(DRM_IOCTL_FREE_BUFS, compat_drm_freebufs),
916 DRM_IOCTL32_DEF(DRM_IOCTL_RM_MAP, compat_drm_rmmap),
917 DRM_IOCTL32_DEF(DRM_IOCTL_SET_SAREA_CTX, compat_drm_setsareactx),
918 DRM_IOCTL32_DEF(DRM_IOCTL_GET_SAREA_CTX, compat_drm_getsareactx),
919 DRM_IOCTL32_DEF(DRM_IOCTL_RES_CTX, compat_drm_resctx),
920 DRM_IOCTL32_DEF(DRM_IOCTL_DMA, compat_drm_dma),
921#if IS_ENABLED(CONFIG_AGP)
922 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_ENABLE, compat_drm_agp_enable),
923 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_INFO, compat_drm_agp_info),
924 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_ALLOC, compat_drm_agp_alloc),
925 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_FREE, compat_drm_agp_free),
926 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_BIND, compat_drm_agp_bind),
927 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_UNBIND, compat_drm_agp_unbind),
928#endif
929 DRM_IOCTL32_DEF(DRM_IOCTL_SG_ALLOC, compat_drm_sg_alloc),
930 DRM_IOCTL32_DEF(DRM_IOCTL_SG_FREE, compat_drm_sg_free),
931#if defined(CONFIG_X86) || defined(CONFIG_IA64)
932 DRM_IOCTL32_DEF(DRM_IOCTL_UPDATE_DRAW, compat_drm_update_draw),
933#endif
934 DRM_IOCTL32_DEF(DRM_IOCTL_WAIT_VBLANK, compat_drm_wait_vblank),
935#if defined(CONFIG_X86) || defined(CONFIG_IA64)
936 DRM_IOCTL32_DEF(DRM_IOCTL_MODE_ADDFB2, compat_drm_mode_addfb2),
937#endif
938};
939
940/**
941 * drm_compat_ioctl - 32bit IOCTL compatibility handler for DRM drivers
942 * @filp: file this ioctl is called on
943 * @cmd: ioctl cmd number
944 * @arg: user argument
945 *
946 * Compatibility handler for 32 bit userspace running on 64 kernels. All actual
947 * IOCTL handling is forwarded to drm_ioctl(), while marshalling structures as
948 * appropriate. Note that this only handles DRM core IOCTLs, if the driver has
949 * botched IOCTL itself, it must handle those by wrapping this function.
950 *
951 * Returns:
952 * Zero on success, negative error code on failure.
953 */
954long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
955{
956 unsigned int nr = DRM_IOCTL_NR(cmd);
957 struct drm_file *file_priv = filp->private_data;
958 drm_ioctl_compat_t *fn;
959 int ret;
960
961 /* Assume that ioctls without an explicit compat routine will just
962 * work. This may not always be a good assumption, but it's better
963 * than always failing.
964 */
965 if (nr >= ARRAY_SIZE(drm_compat_ioctls))
966 return drm_ioctl(filp, cmd, arg);
967
968 fn = drm_compat_ioctls[nr].fn;
969 if (!fn)
970 return drm_ioctl(filp, cmd, arg);
971
972 DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",
973 task_pid_nr(current),
974 (long)old_encode_dev(file_priv->minor->kdev->devt),
975 file_priv->authenticated,
976 drm_compat_ioctls[nr].name);
977 ret = (*fn)(filp, cmd, arg);
978 if (ret)
979 DRM_DEBUG("ret = %d\n", ret);
980 return ret;
981}
982EXPORT_SYMBOL(drm_compat_ioctl);