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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} __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} __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/drm_file.h>
35#include <drm/drm_print.h>
36
37#include "drm_crtc_internal.h"
38#include "drm_internal.h"
39#include "drm_legacy.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
166#if IS_ENABLED(CONFIG_DRM_LEGACY)
167typedef struct drm_map32 {
168 u32 offset; /* Requested physical address (0 for SAREA) */
169 u32 size; /* Requested physical size (bytes) */
170 enum drm_map_type type; /* Type of memory to map */
171 enum drm_map_flags flags; /* Flags */
172 u32 handle; /* User-space: "Handle" to pass to mmap() */
173 int mtrr; /* MTRR slot used */
174} drm_map32_t;
175
176static int compat_drm_getmap(struct file *file, unsigned int cmd,
177 unsigned long arg)
178{
179 drm_map32_t __user *argp = (void __user *)arg;
180 drm_map32_t m32;
181 struct drm_map map;
182 int err;
183
184 if (copy_from_user(&m32, argp, sizeof(m32)))
185 return -EFAULT;
186
187 map.offset = m32.offset;
188 err = drm_ioctl_kernel(file, drm_legacy_getmap_ioctl, &map, 0);
189 if (err)
190 return err;
191
192 m32.offset = map.offset;
193 m32.size = map.size;
194 m32.type = map.type;
195 m32.flags = map.flags;
196 m32.handle = ptr_to_compat((void __user *)map.handle);
197 m32.mtrr = map.mtrr;
198 if (copy_to_user(argp, &m32, sizeof(m32)))
199 return -EFAULT;
200 return 0;
201
202}
203
204static int compat_drm_addmap(struct file *file, unsigned int cmd,
205 unsigned long arg)
206{
207 drm_map32_t __user *argp = (void __user *)arg;
208 drm_map32_t m32;
209 struct drm_map map;
210 int err;
211
212 if (copy_from_user(&m32, argp, sizeof(m32)))
213 return -EFAULT;
214
215 map.offset = m32.offset;
216 map.size = m32.size;
217 map.type = m32.type;
218 map.flags = m32.flags;
219
220 err = drm_ioctl_kernel(file, drm_legacy_addmap_ioctl, &map,
221 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
222 if (err)
223 return err;
224
225 m32.offset = map.offset;
226 m32.mtrr = map.mtrr;
227 m32.handle = ptr_to_compat((void __user *)map.handle);
228 if (map.handle != compat_ptr(m32.handle))
229 pr_err_ratelimited("compat_drm_addmap truncated handle %p for type %d offset %x\n",
230 map.handle, m32.type, m32.offset);
231
232 if (copy_to_user(argp, &m32, sizeof(m32)))
233 return -EFAULT;
234
235 return 0;
236}
237
238static int compat_drm_rmmap(struct file *file, unsigned int cmd,
239 unsigned long arg)
240{
241 drm_map32_t __user *argp = (void __user *)arg;
242 struct drm_map map;
243 u32 handle;
244
245 if (get_user(handle, &argp->handle))
246 return -EFAULT;
247 map.handle = compat_ptr(handle);
248 return drm_ioctl_kernel(file, drm_legacy_rmmap_ioctl, &map, DRM_AUTH);
249}
250#endif
251
252typedef struct drm_client32 {
253 int idx; /* Which client desired? */
254 int auth; /* Is client authenticated? */
255 u32 pid; /* Process ID */
256 u32 uid; /* User ID */
257 u32 magic; /* Magic */
258 u32 iocs; /* Ioctl count */
259} drm_client32_t;
260
261static int compat_drm_getclient(struct file *file, unsigned int cmd,
262 unsigned long arg)
263{
264 drm_client32_t c32;
265 drm_client32_t __user *argp = (void __user *)arg;
266 struct drm_client client;
267 int err;
268
269 if (copy_from_user(&c32, argp, sizeof(c32)))
270 return -EFAULT;
271
272 memset(&client, 0, sizeof(client));
273
274 client.idx = c32.idx;
275
276 err = drm_ioctl_kernel(file, drm_getclient, &client, 0);
277 if (err)
278 return err;
279
280 c32.idx = client.idx;
281 c32.auth = client.auth;
282 c32.pid = client.pid;
283 c32.uid = client.uid;
284 c32.magic = client.magic;
285 c32.iocs = client.iocs;
286
287 if (copy_to_user(argp, &c32, sizeof(c32)))
288 return -EFAULT;
289 return 0;
290}
291
292typedef struct drm_stats32 {
293 u32 count;
294 struct {
295 u32 value;
296 enum drm_stat_type type;
297 } data[15];
298} drm_stats32_t;
299
300static int compat_drm_getstats(struct file *file, unsigned int cmd,
301 unsigned long arg)
302{
303 drm_stats32_t __user *argp = (void __user *)arg;
304
305 /* getstats is defunct, just clear */
306 if (clear_user(argp, sizeof(drm_stats32_t)))
307 return -EFAULT;
308 return 0;
309}
310
311#if IS_ENABLED(CONFIG_DRM_LEGACY)
312typedef struct drm_buf_desc32 {
313 int count; /* Number of buffers of this size */
314 int size; /* Size in bytes */
315 int low_mark; /* Low water mark */
316 int high_mark; /* High water mark */
317 int flags;
318 u32 agp_start; /* Start address in the AGP aperture */
319} drm_buf_desc32_t;
320
321static int compat_drm_addbufs(struct file *file, unsigned int cmd,
322 unsigned long arg)
323{
324 drm_buf_desc32_t __user *argp = (void __user *)arg;
325 drm_buf_desc32_t desc32;
326 struct drm_buf_desc desc;
327 int err;
328
329 if (copy_from_user(&desc32, argp, sizeof(drm_buf_desc32_t)))
330 return -EFAULT;
331
332 desc = (struct drm_buf_desc){
333 desc32.count, desc32.size, desc32.low_mark, desc32.high_mark,
334 desc32.flags, desc32.agp_start
335 };
336
337 err = drm_ioctl_kernel(file, drm_legacy_addbufs, &desc,
338 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
339 if (err)
340 return err;
341
342 desc32 = (drm_buf_desc32_t){
343 desc.count, desc.size, desc.low_mark, desc.high_mark,
344 desc.flags, desc.agp_start
345 };
346 if (copy_to_user(argp, &desc32, sizeof(drm_buf_desc32_t)))
347 return -EFAULT;
348
349 return 0;
350}
351
352static int compat_drm_markbufs(struct file *file, unsigned int cmd,
353 unsigned long arg)
354{
355 drm_buf_desc32_t b32;
356 drm_buf_desc32_t __user *argp = (void __user *)arg;
357 struct drm_buf_desc buf;
358
359 if (copy_from_user(&b32, argp, sizeof(b32)))
360 return -EFAULT;
361
362 buf.size = b32.size;
363 buf.low_mark = b32.low_mark;
364 buf.high_mark = b32.high_mark;
365
366 return drm_ioctl_kernel(file, drm_legacy_markbufs, &buf,
367 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
368}
369
370typedef struct drm_buf_info32 {
371 int count; /**< Entries in list */
372 u32 list;
373} drm_buf_info32_t;
374
375static int copy_one_buf32(void *data, int count, struct drm_buf_entry *from)
376{
377 drm_buf_info32_t *request = data;
378 drm_buf_desc32_t __user *to = compat_ptr(request->list);
379 drm_buf_desc32_t v = {.count = from->buf_count,
380 .size = from->buf_size,
381 .low_mark = from->low_mark,
382 .high_mark = from->high_mark};
383
384 if (copy_to_user(to + count, &v, offsetof(drm_buf_desc32_t, flags)))
385 return -EFAULT;
386 return 0;
387}
388
389static int drm_legacy_infobufs32(struct drm_device *dev, void *data,
390 struct drm_file *file_priv)
391{
392 drm_buf_info32_t *request = data;
393
394 return __drm_legacy_infobufs(dev, data, &request->count, copy_one_buf32);
395}
396
397static int compat_drm_infobufs(struct file *file, unsigned int cmd,
398 unsigned long arg)
399{
400 drm_buf_info32_t req32;
401 drm_buf_info32_t __user *argp = (void __user *)arg;
402 int err;
403
404 if (copy_from_user(&req32, argp, sizeof(req32)))
405 return -EFAULT;
406
407 if (req32.count < 0)
408 req32.count = 0;
409
410 err = drm_ioctl_kernel(file, drm_legacy_infobufs32, &req32, DRM_AUTH);
411 if (err)
412 return err;
413
414 if (put_user(req32.count, &argp->count))
415 return -EFAULT;
416
417 return 0;
418}
419
420typedef struct drm_buf_pub32 {
421 int idx; /**< Index into the master buffer list */
422 int total; /**< Buffer size */
423 int used; /**< Amount of buffer in use (for DMA) */
424 u32 address; /**< Address of buffer */
425} drm_buf_pub32_t;
426
427typedef struct drm_buf_map32 {
428 int count; /**< Length of the buffer list */
429 u32 virtual; /**< Mmap'd area in user-virtual */
430 u32 list; /**< Buffer information */
431} drm_buf_map32_t;
432
433static int map_one_buf32(void *data, int idx, unsigned long virtual,
434 struct drm_buf *buf)
435{
436 drm_buf_map32_t *request = data;
437 drm_buf_pub32_t __user *to = compat_ptr(request->list) + idx;
438 drm_buf_pub32_t v;
439
440 v.idx = buf->idx;
441 v.total = buf->total;
442 v.used = 0;
443 v.address = virtual + buf->offset;
444 if (copy_to_user(to, &v, sizeof(v)))
445 return -EFAULT;
446 return 0;
447}
448
449static int drm_legacy_mapbufs32(struct drm_device *dev, void *data,
450 struct drm_file *file_priv)
451{
452 drm_buf_map32_t *request = data;
453 void __user *v;
454 int err = __drm_legacy_mapbufs(dev, data, &request->count,
455 &v, map_one_buf32,
456 file_priv);
457 request->virtual = ptr_to_compat(v);
458 return err;
459}
460
461static int compat_drm_mapbufs(struct file *file, unsigned int cmd,
462 unsigned long arg)
463{
464 drm_buf_map32_t __user *argp = (void __user *)arg;
465 drm_buf_map32_t req32;
466 int err;
467
468 if (copy_from_user(&req32, argp, sizeof(req32)))
469 return -EFAULT;
470 if (req32.count < 0)
471 return -EINVAL;
472
473 err = drm_ioctl_kernel(file, drm_legacy_mapbufs32, &req32, DRM_AUTH);
474 if (err)
475 return err;
476
477 if (put_user(req32.count, &argp->count)
478 || put_user(req32.virtual, &argp->virtual))
479 return -EFAULT;
480
481 return 0;
482}
483
484typedef struct drm_buf_free32 {
485 int count;
486 u32 list;
487} drm_buf_free32_t;
488
489static int compat_drm_freebufs(struct file *file, unsigned int cmd,
490 unsigned long arg)
491{
492 drm_buf_free32_t req32;
493 struct drm_buf_free request;
494 drm_buf_free32_t __user *argp = (void __user *)arg;
495
496 if (copy_from_user(&req32, argp, sizeof(req32)))
497 return -EFAULT;
498
499 request.count = req32.count;
500 request.list = compat_ptr(req32.list);
501 return drm_ioctl_kernel(file, drm_legacy_freebufs, &request, DRM_AUTH);
502}
503
504typedef struct drm_ctx_priv_map32 {
505 unsigned int ctx_id; /**< Context requesting private mapping */
506 u32 handle; /**< Handle of map */
507} drm_ctx_priv_map32_t;
508
509static int compat_drm_setsareactx(struct file *file, unsigned int cmd,
510 unsigned long arg)
511{
512 drm_ctx_priv_map32_t req32;
513 struct drm_ctx_priv_map request;
514 drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
515
516 if (copy_from_user(&req32, argp, sizeof(req32)))
517 return -EFAULT;
518
519 request.ctx_id = req32.ctx_id;
520 request.handle = compat_ptr(req32.handle);
521 return drm_ioctl_kernel(file, drm_legacy_setsareactx, &request,
522 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
523}
524
525static int compat_drm_getsareactx(struct file *file, unsigned int cmd,
526 unsigned long arg)
527{
528 struct drm_ctx_priv_map req;
529 drm_ctx_priv_map32_t req32;
530 drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
531 int err;
532
533 if (copy_from_user(&req32, argp, sizeof(req32)))
534 return -EFAULT;
535
536 req.ctx_id = req32.ctx_id;
537 err = drm_ioctl_kernel(file, drm_legacy_getsareactx, &req, DRM_AUTH);
538 if (err)
539 return err;
540
541 req32.handle = ptr_to_compat((void __user *)req.handle);
542 if (copy_to_user(argp, &req32, sizeof(req32)))
543 return -EFAULT;
544
545 return 0;
546}
547
548typedef struct drm_ctx_res32 {
549 int count;
550 u32 contexts;
551} drm_ctx_res32_t;
552
553static int compat_drm_resctx(struct file *file, unsigned int cmd,
554 unsigned long arg)
555{
556 drm_ctx_res32_t __user *argp = (void __user *)arg;
557 drm_ctx_res32_t res32;
558 struct drm_ctx_res res;
559 int err;
560
561 if (copy_from_user(&res32, argp, sizeof(res32)))
562 return -EFAULT;
563
564 res.count = res32.count;
565 res.contexts = compat_ptr(res32.contexts);
566 err = drm_ioctl_kernel(file, drm_legacy_resctx, &res, DRM_AUTH);
567 if (err)
568 return err;
569
570 res32.count = res.count;
571 if (copy_to_user(argp, &res32, sizeof(res32)))
572 return -EFAULT;
573
574 return 0;
575}
576
577typedef struct drm_dma32 {
578 int context; /**< Context handle */
579 int send_count; /**< Number of buffers to send */
580 u32 send_indices; /**< List of handles to buffers */
581 u32 send_sizes; /**< Lengths of data to send */
582 enum drm_dma_flags flags; /**< Flags */
583 int request_count; /**< Number of buffers requested */
584 int request_size; /**< Desired size for buffers */
585 u32 request_indices; /**< Buffer information */
586 u32 request_sizes;
587 int granted_count; /**< Number of buffers granted */
588} drm_dma32_t;
589
590static int compat_drm_dma(struct file *file, unsigned int cmd,
591 unsigned long arg)
592{
593 drm_dma32_t d32;
594 drm_dma32_t __user *argp = (void __user *)arg;
595 struct drm_dma d;
596 int err;
597
598 if (copy_from_user(&d32, argp, sizeof(d32)))
599 return -EFAULT;
600
601 d.context = d32.context;
602 d.send_count = d32.send_count;
603 d.send_indices = compat_ptr(d32.send_indices);
604 d.send_sizes = compat_ptr(d32.send_sizes);
605 d.flags = d32.flags;
606 d.request_count = d32.request_count;
607 d.request_indices = compat_ptr(d32.request_indices);
608 d.request_sizes = compat_ptr(d32.request_sizes);
609 err = drm_ioctl_kernel(file, drm_legacy_dma_ioctl, &d, DRM_AUTH);
610 if (err)
611 return err;
612
613 if (put_user(d.request_size, &argp->request_size)
614 || put_user(d.granted_count, &argp->granted_count))
615 return -EFAULT;
616
617 return 0;
618}
619#endif
620
621#if IS_ENABLED(CONFIG_DRM_LEGACY)
622#if IS_ENABLED(CONFIG_AGP)
623typedef struct drm_agp_mode32 {
624 u32 mode; /**< AGP mode */
625} drm_agp_mode32_t;
626
627static int compat_drm_agp_enable(struct file *file, unsigned int cmd,
628 unsigned long arg)
629{
630 drm_agp_mode32_t __user *argp = (void __user *)arg;
631 struct drm_agp_mode mode;
632
633 if (get_user(mode.mode, &argp->mode))
634 return -EFAULT;
635
636 return drm_ioctl_kernel(file, drm_legacy_agp_enable_ioctl, &mode,
637 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
638}
639
640typedef struct drm_agp_info32 {
641 int agp_version_major;
642 int agp_version_minor;
643 u32 mode;
644 u32 aperture_base; /* physical address */
645 u32 aperture_size; /* bytes */
646 u32 memory_allowed; /* bytes */
647 u32 memory_used;
648
649 /* PCI information */
650 unsigned short id_vendor;
651 unsigned short id_device;
652} drm_agp_info32_t;
653
654static int compat_drm_agp_info(struct file *file, unsigned int cmd,
655 unsigned long arg)
656{
657 drm_agp_info32_t __user *argp = (void __user *)arg;
658 drm_agp_info32_t i32;
659 struct drm_agp_info info;
660 int err;
661
662 err = drm_ioctl_kernel(file, drm_legacy_agp_info_ioctl, &info, DRM_AUTH);
663 if (err)
664 return err;
665
666 i32.agp_version_major = info.agp_version_major;
667 i32.agp_version_minor = info.agp_version_minor;
668 i32.mode = info.mode;
669 i32.aperture_base = info.aperture_base;
670 i32.aperture_size = info.aperture_size;
671 i32.memory_allowed = info.memory_allowed;
672 i32.memory_used = info.memory_used;
673 i32.id_vendor = info.id_vendor;
674 i32.id_device = info.id_device;
675 if (copy_to_user(argp, &i32, sizeof(i32)))
676 return -EFAULT;
677
678 return 0;
679}
680
681typedef struct drm_agp_buffer32 {
682 u32 size; /**< In bytes -- will round to page boundary */
683 u32 handle; /**< Used for binding / unbinding */
684 u32 type; /**< Type of memory to allocate */
685 u32 physical; /**< Physical used by i810 */
686} drm_agp_buffer32_t;
687
688static int compat_drm_agp_alloc(struct file *file, unsigned int cmd,
689 unsigned long arg)
690{
691 drm_agp_buffer32_t __user *argp = (void __user *)arg;
692 drm_agp_buffer32_t req32;
693 struct drm_agp_buffer request;
694 int err;
695
696 if (copy_from_user(&req32, argp, sizeof(req32)))
697 return -EFAULT;
698
699 request.size = req32.size;
700 request.type = req32.type;
701 err = drm_ioctl_kernel(file, drm_legacy_agp_alloc_ioctl, &request,
702 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
703 if (err)
704 return err;
705
706 req32.handle = request.handle;
707 req32.physical = request.physical;
708 if (copy_to_user(argp, &req32, sizeof(req32))) {
709 drm_ioctl_kernel(file, drm_legacy_agp_free_ioctl, &request,
710 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
711 return -EFAULT;
712 }
713
714 return 0;
715}
716
717static int compat_drm_agp_free(struct file *file, unsigned int cmd,
718 unsigned long arg)
719{
720 drm_agp_buffer32_t __user *argp = (void __user *)arg;
721 struct drm_agp_buffer request;
722
723 if (get_user(request.handle, &argp->handle))
724 return -EFAULT;
725
726 return drm_ioctl_kernel(file, drm_legacy_agp_free_ioctl, &request,
727 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
728}
729
730typedef struct drm_agp_binding32 {
731 u32 handle; /**< From drm_agp_buffer */
732 u32 offset; /**< In bytes -- will round to page boundary */
733} drm_agp_binding32_t;
734
735static int compat_drm_agp_bind(struct file *file, unsigned int cmd,
736 unsigned long arg)
737{
738 drm_agp_binding32_t __user *argp = (void __user *)arg;
739 drm_agp_binding32_t req32;
740 struct drm_agp_binding request;
741
742 if (copy_from_user(&req32, argp, sizeof(req32)))
743 return -EFAULT;
744
745 request.handle = req32.handle;
746 request.offset = req32.offset;
747 return drm_ioctl_kernel(file, drm_legacy_agp_bind_ioctl, &request,
748 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
749}
750
751static int compat_drm_agp_unbind(struct file *file, unsigned int cmd,
752 unsigned long arg)
753{
754 drm_agp_binding32_t __user *argp = (void __user *)arg;
755 struct drm_agp_binding request;
756
757 if (get_user(request.handle, &argp->handle))
758 return -EFAULT;
759
760 return drm_ioctl_kernel(file, drm_legacy_agp_unbind_ioctl, &request,
761 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
762}
763#endif /* CONFIG_AGP */
764
765typedef struct drm_scatter_gather32 {
766 u32 size; /**< In bytes -- will round to page boundary */
767 u32 handle; /**< Used for mapping / unmapping */
768} drm_scatter_gather32_t;
769
770static int compat_drm_sg_alloc(struct file *file, unsigned int cmd,
771 unsigned long arg)
772{
773 drm_scatter_gather32_t __user *argp = (void __user *)arg;
774 struct drm_scatter_gather request;
775 int err;
776
777 if (get_user(request.size, &argp->size))
778 return -EFAULT;
779
780 err = drm_ioctl_kernel(file, drm_legacy_sg_alloc, &request,
781 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
782 if (err)
783 return err;
784
785 /* XXX not sure about the handle conversion here... */
786 if (put_user(request.handle >> PAGE_SHIFT, &argp->handle))
787 return -EFAULT;
788
789 return 0;
790}
791
792static int compat_drm_sg_free(struct file *file, unsigned int cmd,
793 unsigned long arg)
794{
795 drm_scatter_gather32_t __user *argp = (void __user *)arg;
796 struct drm_scatter_gather request;
797 unsigned long x;
798
799 if (get_user(x, &argp->handle))
800 return -EFAULT;
801 request.handle = x << PAGE_SHIFT;
802 return drm_ioctl_kernel(file, drm_legacy_sg_free, &request,
803 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
804}
805#endif
806#if defined(CONFIG_X86)
807typedef struct drm_update_draw32 {
808 drm_drawable_t handle;
809 unsigned int type;
810 unsigned int num;
811 /* 64-bit version has a 32-bit pad here */
812 u64 data; /**< Pointer */
813} __attribute__((packed)) drm_update_draw32_t;
814
815static int compat_drm_update_draw(struct file *file, unsigned int cmd,
816 unsigned long arg)
817{
818 /* update_draw is defunct */
819 return 0;
820}
821#endif
822
823struct drm_wait_vblank_request32 {
824 enum drm_vblank_seq_type type;
825 unsigned int sequence;
826 u32 signal;
827};
828
829struct drm_wait_vblank_reply32 {
830 enum drm_vblank_seq_type type;
831 unsigned int sequence;
832 s32 tval_sec;
833 s32 tval_usec;
834};
835
836typedef union drm_wait_vblank32 {
837 struct drm_wait_vblank_request32 request;
838 struct drm_wait_vblank_reply32 reply;
839} drm_wait_vblank32_t;
840
841static int compat_drm_wait_vblank(struct file *file, unsigned int cmd,
842 unsigned long arg)
843{
844 drm_wait_vblank32_t __user *argp = (void __user *)arg;
845 drm_wait_vblank32_t req32;
846 union drm_wait_vblank req;
847 int err;
848
849 if (copy_from_user(&req32, argp, sizeof(req32)))
850 return -EFAULT;
851
852 memset(&req, 0, sizeof(req));
853
854 req.request.type = req32.request.type;
855 req.request.sequence = req32.request.sequence;
856 req.request.signal = req32.request.signal;
857 err = drm_ioctl_kernel(file, drm_wait_vblank_ioctl, &req, DRM_UNLOCKED);
858
859 req32.reply.type = req.reply.type;
860 req32.reply.sequence = req.reply.sequence;
861 req32.reply.tval_sec = req.reply.tval_sec;
862 req32.reply.tval_usec = req.reply.tval_usec;
863 if (copy_to_user(argp, &req32, sizeof(req32)))
864 return -EFAULT;
865
866 return err;
867}
868
869#if defined(CONFIG_X86)
870typedef struct drm_mode_fb_cmd232 {
871 u32 fb_id;
872 u32 width;
873 u32 height;
874 u32 pixel_format;
875 u32 flags;
876 u32 handles[4];
877 u32 pitches[4];
878 u32 offsets[4];
879 u64 modifier[4];
880} __attribute__((packed)) drm_mode_fb_cmd232_t;
881
882static int compat_drm_mode_addfb2(struct file *file, unsigned int cmd,
883 unsigned long arg)
884{
885 struct drm_mode_fb_cmd232 __user *argp = (void __user *)arg;
886 struct drm_mode_fb_cmd2 req64;
887 int err;
888
889 memset(&req64, 0, sizeof(req64));
890
891 if (copy_from_user(&req64, argp,
892 offsetof(drm_mode_fb_cmd232_t, modifier)))
893 return -EFAULT;
894
895 if (copy_from_user(&req64.modifier, &argp->modifier,
896 sizeof(req64.modifier)))
897 return -EFAULT;
898
899 err = drm_ioctl_kernel(file, drm_mode_addfb2, &req64, 0);
900 if (err)
901 return err;
902
903 if (put_user(req64.fb_id, &argp->fb_id))
904 return -EFAULT;
905
906 return 0;
907}
908#endif
909
910static struct {
911 drm_ioctl_compat_t *fn;
912 char *name;
913} drm_compat_ioctls[] = {
914#define DRM_IOCTL32_DEF(n, f) [DRM_IOCTL_NR(n##32)] = {.fn = f, .name = #n}
915 DRM_IOCTL32_DEF(DRM_IOCTL_VERSION, compat_drm_version),
916 DRM_IOCTL32_DEF(DRM_IOCTL_GET_UNIQUE, compat_drm_getunique),
917#if IS_ENABLED(CONFIG_DRM_LEGACY)
918 DRM_IOCTL32_DEF(DRM_IOCTL_GET_MAP, compat_drm_getmap),
919#endif
920 DRM_IOCTL32_DEF(DRM_IOCTL_GET_CLIENT, compat_drm_getclient),
921 DRM_IOCTL32_DEF(DRM_IOCTL_GET_STATS, compat_drm_getstats),
922 DRM_IOCTL32_DEF(DRM_IOCTL_SET_UNIQUE, compat_drm_setunique),
923#if IS_ENABLED(CONFIG_DRM_LEGACY)
924 DRM_IOCTL32_DEF(DRM_IOCTL_ADD_MAP, compat_drm_addmap),
925 DRM_IOCTL32_DEF(DRM_IOCTL_ADD_BUFS, compat_drm_addbufs),
926 DRM_IOCTL32_DEF(DRM_IOCTL_MARK_BUFS, compat_drm_markbufs),
927 DRM_IOCTL32_DEF(DRM_IOCTL_INFO_BUFS, compat_drm_infobufs),
928 DRM_IOCTL32_DEF(DRM_IOCTL_MAP_BUFS, compat_drm_mapbufs),
929 DRM_IOCTL32_DEF(DRM_IOCTL_FREE_BUFS, compat_drm_freebufs),
930 DRM_IOCTL32_DEF(DRM_IOCTL_RM_MAP, compat_drm_rmmap),
931 DRM_IOCTL32_DEF(DRM_IOCTL_SET_SAREA_CTX, compat_drm_setsareactx),
932 DRM_IOCTL32_DEF(DRM_IOCTL_GET_SAREA_CTX, compat_drm_getsareactx),
933 DRM_IOCTL32_DEF(DRM_IOCTL_RES_CTX, compat_drm_resctx),
934 DRM_IOCTL32_DEF(DRM_IOCTL_DMA, compat_drm_dma),
935#if IS_ENABLED(CONFIG_AGP)
936 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_ENABLE, compat_drm_agp_enable),
937 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_INFO, compat_drm_agp_info),
938 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_ALLOC, compat_drm_agp_alloc),
939 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_FREE, compat_drm_agp_free),
940 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_BIND, compat_drm_agp_bind),
941 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_UNBIND, compat_drm_agp_unbind),
942#endif
943#endif
944#if IS_ENABLED(CONFIG_DRM_LEGACY)
945 DRM_IOCTL32_DEF(DRM_IOCTL_SG_ALLOC, compat_drm_sg_alloc),
946 DRM_IOCTL32_DEF(DRM_IOCTL_SG_FREE, compat_drm_sg_free),
947#endif
948#if defined(CONFIG_X86) || defined(CONFIG_IA64)
949 DRM_IOCTL32_DEF(DRM_IOCTL_UPDATE_DRAW, compat_drm_update_draw),
950#endif
951 DRM_IOCTL32_DEF(DRM_IOCTL_WAIT_VBLANK, compat_drm_wait_vblank),
952#if defined(CONFIG_X86) || defined(CONFIG_IA64)
953 DRM_IOCTL32_DEF(DRM_IOCTL_MODE_ADDFB2, compat_drm_mode_addfb2),
954#endif
955};
956
957/**
958 * drm_compat_ioctl - 32bit IOCTL compatibility handler for DRM drivers
959 * @filp: file this ioctl is called on
960 * @cmd: ioctl cmd number
961 * @arg: user argument
962 *
963 * Compatibility handler for 32 bit userspace running on 64 kernels. All actual
964 * IOCTL handling is forwarded to drm_ioctl(), while marshalling structures as
965 * appropriate. Note that this only handles DRM core IOCTLs, if the driver has
966 * botched IOCTL itself, it must handle those by wrapping this function.
967 *
968 * Returns:
969 * Zero on success, negative error code on failure.
970 */
971long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
972{
973 unsigned int nr = DRM_IOCTL_NR(cmd);
974 struct drm_file *file_priv = filp->private_data;
975 drm_ioctl_compat_t *fn;
976 int ret;
977
978 /* Assume that ioctls without an explicit compat routine will just
979 * work. This may not always be a good assumption, but it's better
980 * than always failing.
981 */
982 if (nr >= ARRAY_SIZE(drm_compat_ioctls))
983 return drm_ioctl(filp, cmd, arg);
984
985 fn = drm_compat_ioctls[nr].fn;
986 if (!fn)
987 return drm_ioctl(filp, cmd, arg);
988
989 DRM_DEBUG("comm=\"%s\", pid=%d, dev=0x%lx, auth=%d, %s\n",
990 current->comm, task_pid_nr(current),
991 (long)old_encode_dev(file_priv->minor->kdev->devt),
992 file_priv->authenticated,
993 drm_compat_ioctls[nr].name);
994 ret = (*fn)(filp, cmd, arg);
995 if (ret)
996 DRM_DEBUG("ret = %d\n", ret);
997 return ret;
998}
999EXPORT_SYMBOL(drm_compat_ioctl);