4 * 32-bit ioctl compatibility routines for the DRM.
6 * \author Paul Mackerras <paulus@samba.org>
8 * Copyright (C) Paul Mackerras 2005.
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:
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
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
30 #include <linux/compat.h>
31 #include <linux/ratelimit.h>
32 #include <linux/export.h>
35 #include "drm_legacy.h"
36 #include "drm_internal.h"
38 #define DRM_IOCTL_VERSION32 DRM_IOWR(0x00, drm_version32_t)
39 #define DRM_IOCTL_GET_UNIQUE32 DRM_IOWR(0x01, drm_unique32_t)
40 #define DRM_IOCTL_GET_MAP32 DRM_IOWR(0x04, drm_map32_t)
41 #define DRM_IOCTL_GET_CLIENT32 DRM_IOWR(0x05, drm_client32_t)
42 #define DRM_IOCTL_GET_STATS32 DRM_IOR( 0x06, drm_stats32_t)
44 #define DRM_IOCTL_SET_UNIQUE32 DRM_IOW( 0x10, drm_unique32_t)
45 #define DRM_IOCTL_ADD_MAP32 DRM_IOWR(0x15, drm_map32_t)
46 #define DRM_IOCTL_ADD_BUFS32 DRM_IOWR(0x16, drm_buf_desc32_t)
47 #define DRM_IOCTL_MARK_BUFS32 DRM_IOW( 0x17, drm_buf_desc32_t)
48 #define DRM_IOCTL_INFO_BUFS32 DRM_IOWR(0x18, drm_buf_info32_t)
49 #define DRM_IOCTL_MAP_BUFS32 DRM_IOWR(0x19, drm_buf_map32_t)
50 #define DRM_IOCTL_FREE_BUFS32 DRM_IOW( 0x1a, drm_buf_free32_t)
52 #define DRM_IOCTL_RM_MAP32 DRM_IOW( 0x1b, drm_map32_t)
54 #define DRM_IOCTL_SET_SAREA_CTX32 DRM_IOW( 0x1c, drm_ctx_priv_map32_t)
55 #define DRM_IOCTL_GET_SAREA_CTX32 DRM_IOWR(0x1d, drm_ctx_priv_map32_t)
57 #define DRM_IOCTL_RES_CTX32 DRM_IOWR(0x26, drm_ctx_res32_t)
58 #define DRM_IOCTL_DMA32 DRM_IOWR(0x29, drm_dma32_t)
60 #define DRM_IOCTL_AGP_ENABLE32 DRM_IOW( 0x32, drm_agp_mode32_t)
61 #define DRM_IOCTL_AGP_INFO32 DRM_IOR( 0x33, drm_agp_info32_t)
62 #define DRM_IOCTL_AGP_ALLOC32 DRM_IOWR(0x34, drm_agp_buffer32_t)
63 #define DRM_IOCTL_AGP_FREE32 DRM_IOW( 0x35, drm_agp_buffer32_t)
64 #define DRM_IOCTL_AGP_BIND32 DRM_IOW( 0x36, drm_agp_binding32_t)
65 #define DRM_IOCTL_AGP_UNBIND32 DRM_IOW( 0x37, drm_agp_binding32_t)
67 #define DRM_IOCTL_SG_ALLOC32 DRM_IOW( 0x38, drm_scatter_gather32_t)
68 #define DRM_IOCTL_SG_FREE32 DRM_IOW( 0x39, drm_scatter_gather32_t)
70 #define DRM_IOCTL_UPDATE_DRAW32 DRM_IOW( 0x3f, drm_update_draw32_t)
72 #define DRM_IOCTL_WAIT_VBLANK32 DRM_IOWR(0x3a, drm_wait_vblank32_t)
74 #define DRM_IOCTL_MODE_ADDFB232 DRM_IOWR(0xb8, drm_mode_fb_cmd232_t)
76 typedef struct drm_version_32 {
77 int version_major; /* Major version */
78 int version_minor; /* Minor version */
79 int version_patchlevel; /* Patch level */
80 u32 name_len; /* Length of name buffer */
81 u32 name; /* Name of driver */
82 u32 date_len; /* Length of date buffer */
83 u32 date; /* User-space buffer to hold date */
84 u32 desc_len; /* Length of desc buffer */
85 u32 desc; /* User-space buffer to hold desc */
88 static int compat_drm_version(struct file *file, unsigned int cmd,
95 if (copy_from_user(&v32, (void __user *)arg, sizeof(v32)))
98 v = (struct drm_version) {
99 .name_len = v32.name_len,
100 .name = compat_ptr(v32.name),
101 .date_len = v32.date_len,
102 .date = compat_ptr(v32.date),
103 .desc_len = v32.desc_len,
104 .desc = compat_ptr(v32.desc),
106 err = drm_ioctl_kernel(file, drm_version, &v,
107 DRM_UNLOCKED|DRM_RENDER_ALLOW|DRM_CONTROL_ALLOW);
111 v32.version_major = v.version_major;
112 v32.version_minor = v.version_minor;
113 v32.version_patchlevel = v.version_patchlevel;
114 if (copy_to_user((void __user *)arg, &v32, sizeof(v32)))
119 typedef struct drm_unique32 {
120 u32 unique_len; /* Length of unique */
121 u32 unique; /* Unique name for driver instantiation */
124 static int compat_drm_getunique(struct file *file, unsigned int cmd,
128 struct drm_unique uq;
131 if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32)))
133 uq = (struct drm_unique){
134 .unique_len = uq32.unique_len,
135 .unique = compat_ptr(uq32.unique),
138 err = drm_ioctl_kernel(file, drm_getunique, &uq, DRM_UNLOCKED);
142 uq32.unique_len = uq.unique_len;
143 if (copy_to_user((void __user *)arg, &uq32, sizeof(uq32)))
148 static int compat_drm_setunique(struct file *file, unsigned int cmd,
155 typedef struct drm_map32 {
156 u32 offset; /* Requested physical address (0 for SAREA) */
157 u32 size; /* Requested physical size (bytes) */
158 enum drm_map_type type; /* Type of memory to map */
159 enum drm_map_flags flags; /* Flags */
160 u32 handle; /* User-space: "Handle" to pass to mmap() */
161 int mtrr; /* MTRR slot used */
164 static int compat_drm_getmap(struct file *file, unsigned int cmd,
167 drm_map32_t __user *argp = (void __user *)arg;
172 if (copy_from_user(&m32, argp, sizeof(m32)))
175 map.offset = m32.offset;
176 err = drm_ioctl_kernel(file, drm_legacy_getmap_ioctl, &map, DRM_UNLOCKED);
180 m32.offset = map.offset;
183 m32.flags = map.flags;
184 m32.handle = ptr_to_compat(map.handle);
186 if (copy_to_user(argp, &m32, sizeof(m32)))
192 static int compat_drm_addmap(struct file *file, unsigned int cmd,
195 drm_map32_t __user *argp = (void __user *)arg;
200 if (copy_from_user(&m32, argp, sizeof(m32)))
203 map.offset = m32.offset;
206 map.flags = m32.flags;
208 err = drm_ioctl_kernel(file, drm_legacy_addmap_ioctl, &map,
209 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
213 m32.offset = map.offset;
215 m32.handle = ptr_to_compat(map.handle);
216 if (map.handle != compat_ptr(m32.handle))
217 pr_err_ratelimited("compat_drm_addmap truncated handle %p for type %d offset %x\n",
218 map.handle, m32.type, m32.offset);
220 if (copy_to_user(argp, &m32, sizeof(m32)))
226 static int compat_drm_rmmap(struct file *file, unsigned int cmd,
229 drm_map32_t __user *argp = (void __user *)arg;
230 struct drm_map __user *map;
233 if (get_user(handle, &argp->handle))
236 map = compat_alloc_user_space(sizeof(*map));
239 if (__put_user((void *)(unsigned long)handle, &map->handle))
242 return drm_ioctl(file, DRM_IOCTL_RM_MAP, (unsigned long)map);
245 typedef struct drm_client32 {
246 int idx; /* Which client desired? */
247 int auth; /* Is client authenticated? */
248 u32 pid; /* Process ID */
249 u32 uid; /* User ID */
250 u32 magic; /* Magic */
251 u32 iocs; /* Ioctl count */
254 static int compat_drm_getclient(struct file *file, unsigned int cmd,
258 drm_client32_t __user *argp = (void __user *)arg;
259 struct drm_client client;
262 if (copy_from_user(&c32, argp, sizeof(c32)))
265 client.idx = c32.idx;
267 err = drm_ioctl_kernel(file, drm_getclient, &client, DRM_UNLOCKED);
271 c32.idx = client.idx;
272 c32.auth = client.auth;
273 c32.pid = client.pid;
274 c32.uid = client.uid;
275 c32.magic = client.magic;
276 c32.iocs = client.iocs;
278 if (copy_to_user(argp, &c32, sizeof(c32)))
283 typedef struct drm_stats32 {
287 enum drm_stat_type type;
291 static int compat_drm_getstats(struct file *file, unsigned int cmd,
294 drm_stats32_t __user *argp = (void __user *)arg;
297 err = drm_ioctl_kernel(file, drm_noop, NULL, DRM_UNLOCKED);
301 if (clear_user(argp, sizeof(drm_stats32_t)))
306 typedef struct drm_buf_desc32 {
307 int count; /* Number of buffers of this size */
308 int size; /* Size in bytes */
309 int low_mark; /* Low water mark */
310 int high_mark; /* High water mark */
312 u32 agp_start; /* Start address in the AGP aperture */
315 static int compat_drm_addbufs(struct file *file, unsigned int cmd,
318 drm_buf_desc32_t __user *argp = (void __user *)arg;
319 drm_buf_desc32_t desc32;
320 struct drm_buf_desc desc;
323 if (copy_from_user(&desc32, argp, sizeof(drm_buf_desc32_t)))
326 desc = (struct drm_buf_desc){
327 desc32.count, desc32.size, desc32.low_mark, desc32.high_mark,
328 desc32.flags, desc32.agp_start
331 err = drm_ioctl_kernel(file, drm_legacy_addbufs, &desc,
332 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
336 desc32 = (drm_buf_desc32_t){
337 desc.count, desc.size, desc.low_mark, desc.high_mark,
338 desc.flags, desc.agp_start
340 if (copy_to_user(argp, &desc32, sizeof(drm_buf_desc32_t)))
346 static int compat_drm_markbufs(struct file *file, unsigned int cmd,
349 drm_buf_desc32_t b32;
350 drm_buf_desc32_t __user *argp = (void __user *)arg;
351 struct drm_buf_desc __user buf;
353 if (copy_from_user(&b32, argp, sizeof(b32)))
357 buf.low_mark = b32.low_mark;
358 buf.high_mark = b32.high_mark;
360 return drm_ioctl_kernel(file, drm_legacy_markbufs, &buf,
361 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
364 typedef struct drm_buf_info32 {
365 int count; /**< Entries in list */
369 static int copy_one_buf32(void *data, int count, struct drm_buf_entry *from)
371 drm_buf_info32_t *request = data;
372 drm_buf_desc32_t __user *to = compat_ptr(request->list);
373 drm_buf_desc32_t v = {.count = from->buf_count,
374 .size = from->buf_size,
375 .low_mark = from->low_mark,
376 .high_mark = from->high_mark};
377 return copy_to_user(to + count, &v, offsetof(drm_buf_desc32_t, flags));
380 static int drm_legacy_infobufs32(struct drm_device *dev, void *data,
381 struct drm_file *file_priv)
383 drm_buf_info32_t *request = data;
384 return __drm_legacy_infobufs(dev, data, &request->count, copy_one_buf32);
387 static int compat_drm_infobufs(struct file *file, unsigned int cmd,
390 drm_buf_info32_t req32;
391 drm_buf_info32_t __user *argp = (void __user *)arg;
394 if (copy_from_user(&req32, argp, sizeof(req32)))
400 err = drm_ioctl_kernel(file, drm_legacy_infobufs32, &req32, DRM_AUTH);
404 if (put_user(req32.count, &argp->count))
410 typedef struct drm_buf_pub32 {
411 int idx; /**< Index into the master buffer list */
412 int total; /**< Buffer size */
413 int used; /**< Amount of buffer in use (for DMA) */
414 u32 address; /**< Address of buffer */
417 typedef struct drm_buf_map32 {
418 int count; /**< Length of the buffer list */
419 u32 virtual; /**< Mmap'd area in user-virtual */
420 u32 list; /**< Buffer information */
423 static int compat_drm_mapbufs(struct file *file, unsigned int cmd,
426 drm_buf_map32_t __user *argp = (void __user *)arg;
427 drm_buf_map32_t req32;
428 drm_buf_pub32_t __user *list32;
429 struct drm_buf_map __user *request;
430 struct drm_buf_pub __user *list;
436 if (copy_from_user(&req32, argp, sizeof(req32)))
439 list32 = (void __user *)(unsigned long)req32.list;
443 nbytes = sizeof(*request) + count * sizeof(struct drm_buf_pub);
444 request = compat_alloc_user_space(nbytes);
447 list = (struct drm_buf_pub *) (request + 1);
449 if (__put_user(count, &request->count)
450 || __put_user(list, &request->list))
453 err = drm_ioctl(file, DRM_IOCTL_MAP_BUFS, (unsigned long)request);
457 if (__get_user(actual, &request->count))
460 for (i = 0; i < actual; ++i)
461 if (__copy_in_user(&list32[i], &list[i],
462 offsetof(struct drm_buf_pub, address))
463 || __get_user(addr, &list[i].address)
464 || __put_user((unsigned long)addr,
468 if (__put_user(actual, &argp->count)
469 || __get_user(addr, &request->virtual)
470 || __put_user((unsigned long)addr, &argp->virtual))
476 typedef struct drm_buf_free32 {
481 static int compat_drm_freebufs(struct file *file, unsigned int cmd,
484 drm_buf_free32_t req32;
485 struct drm_buf_free request;
486 drm_buf_free32_t __user *argp = (void __user *)arg;
488 if (copy_from_user(&req32, argp, sizeof(req32)))
491 request.count = req32.count;
492 request.list = compat_ptr(req32.list);
493 return drm_ioctl_kernel(file, drm_legacy_freebufs, &request, DRM_AUTH);
496 typedef struct drm_ctx_priv_map32 {
497 unsigned int ctx_id; /**< Context requesting private mapping */
498 u32 handle; /**< Handle of map */
499 } drm_ctx_priv_map32_t;
501 static int compat_drm_setsareactx(struct file *file, unsigned int cmd,
504 drm_ctx_priv_map32_t req32;
505 struct drm_ctx_priv_map request;
506 drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
508 if (copy_from_user(&req32, argp, sizeof(req32)))
511 request.ctx_id = req32.ctx_id;
512 request.handle = compat_ptr(req32.handle);
513 return drm_ioctl_kernel(file, drm_legacy_setsareactx, &request,
514 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
517 static int compat_drm_getsareactx(struct file *file, unsigned int cmd,
520 struct drm_ctx_priv_map req;
521 drm_ctx_priv_map32_t req32;
522 drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
525 if (copy_from_user(&req32, argp, sizeof(req32)))
528 req.ctx_id = req32.ctx_id;
529 err = drm_ioctl_kernel(file, drm_legacy_getsareactx, &req, DRM_AUTH);
533 req32.handle = ptr_to_compat(req.handle);
534 if (copy_to_user(argp, &req32, sizeof(req32)))
540 typedef struct drm_ctx_res32 {
545 static int compat_drm_resctx(struct file *file, unsigned int cmd,
548 drm_ctx_res32_t __user *argp = (void __user *)arg;
549 drm_ctx_res32_t res32;
550 struct drm_ctx_res res;
553 if (copy_from_user(&res32, argp, sizeof(res32)))
556 res.count = res32.count;
557 res.contexts = compat_ptr(res32.contexts);
558 err = drm_ioctl_kernel(file, drm_legacy_resctx, &res, DRM_AUTH);
562 res32.count = res.count;
563 if (copy_to_user(argp, &res32, sizeof(res32)))
569 typedef struct drm_dma32 {
570 int context; /**< Context handle */
571 int send_count; /**< Number of buffers to send */
572 u32 send_indices; /**< List of handles to buffers */
573 u32 send_sizes; /**< Lengths of data to send */
574 enum drm_dma_flags flags; /**< Flags */
575 int request_count; /**< Number of buffers requested */
576 int request_size; /**< Desired size for buffers */
577 u32 request_indices; /**< Buffer information */
579 int granted_count; /**< Number of buffers granted */
582 static int compat_drm_dma(struct file *file, unsigned int cmd,
586 drm_dma32_t __user *argp = (void __user *)arg;
590 if (copy_from_user(&d32, argp, sizeof(d32)))
593 d.context = d32.context;
594 d.send_count = d32.send_count;
595 d.send_indices = compat_ptr(d32.send_indices);
596 d.send_sizes = compat_ptr(d32.send_sizes);
598 d.request_count = d32.request_count;
599 d.request_indices = compat_ptr(d32.request_indices);
600 d.request_sizes = compat_ptr(d32.request_sizes);
601 err = drm_ioctl_kernel(file, drm_legacy_dma_ioctl, &d, DRM_AUTH);
605 if (put_user(d.request_size, &argp->request_size)
606 || put_user(d.granted_count, &argp->granted_count))
612 #if IS_ENABLED(CONFIG_AGP)
613 typedef struct drm_agp_mode32 {
614 u32 mode; /**< AGP mode */
617 static int compat_drm_agp_enable(struct file *file, unsigned int cmd,
620 drm_agp_mode32_t __user *argp = (void __user *)arg;
621 struct drm_agp_mode mode;
623 if (get_user(mode.mode, &argp->mode))
626 return drm_ioctl_kernel(file, drm_agp_enable_ioctl, &mode,
627 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
630 typedef struct drm_agp_info32 {
631 int agp_version_major;
632 int agp_version_minor;
634 u32 aperture_base; /* physical address */
635 u32 aperture_size; /* bytes */
636 u32 memory_allowed; /* bytes */
639 /* PCI information */
640 unsigned short id_vendor;
641 unsigned short id_device;
644 static int compat_drm_agp_info(struct file *file, unsigned int cmd,
647 drm_agp_info32_t __user *argp = (void __user *)arg;
648 drm_agp_info32_t i32;
649 struct drm_agp_info info;
652 err = drm_ioctl_kernel(file, drm_agp_info_ioctl, &info, DRM_AUTH);
656 i32.agp_version_major = info.agp_version_major;
657 i32.agp_version_minor = info.agp_version_minor;
658 i32.mode = info.mode;
659 i32.aperture_base = info.aperture_base;
660 i32.aperture_size = info.aperture_size;
661 i32.memory_allowed = info.memory_allowed;
662 i32.memory_used = info.memory_used;
663 i32.id_vendor = info.id_vendor;
664 i32.id_device = info.id_device;
665 if (copy_to_user(argp, &i32, sizeof(i32)))
671 typedef struct drm_agp_buffer32 {
672 u32 size; /**< In bytes -- will round to page boundary */
673 u32 handle; /**< Used for binding / unbinding */
674 u32 type; /**< Type of memory to allocate */
675 u32 physical; /**< Physical used by i810 */
676 } drm_agp_buffer32_t;
678 static int compat_drm_agp_alloc(struct file *file, unsigned int cmd,
681 drm_agp_buffer32_t __user *argp = (void __user *)arg;
682 drm_agp_buffer32_t req32;
683 struct drm_agp_buffer request;
686 if (copy_from_user(&req32, argp, sizeof(req32)))
689 request.size = req32.size;
690 request.type = req32.type;
691 err = drm_ioctl_kernel(file, drm_agp_alloc_ioctl, &request,
692 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
696 req32.handle = request.handle;
697 req32.physical = request.physical;
698 if (copy_to_user(argp, &req32, sizeof(req32))) {
699 drm_ioctl_kernel(file, drm_agp_free_ioctl, &request,
700 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
707 static int compat_drm_agp_free(struct file *file, unsigned int cmd,
710 drm_agp_buffer32_t __user *argp = (void __user *)arg;
711 struct drm_agp_buffer request;
713 if (get_user(request.handle, &argp->handle))
716 return drm_ioctl_kernel(file, drm_agp_free_ioctl, &request,
717 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
720 typedef struct drm_agp_binding32 {
721 u32 handle; /**< From drm_agp_buffer */
722 u32 offset; /**< In bytes -- will round to page boundary */
723 } drm_agp_binding32_t;
725 static int compat_drm_agp_bind(struct file *file, unsigned int cmd,
728 drm_agp_binding32_t __user *argp = (void __user *)arg;
729 drm_agp_binding32_t req32;
730 struct drm_agp_binding request;
732 if (copy_from_user(&req32, argp, sizeof(req32)))
735 request.handle = req32.handle;
736 request.offset = req32.offset;
737 return drm_ioctl_kernel(file, drm_agp_bind_ioctl, &request,
738 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
741 static int compat_drm_agp_unbind(struct file *file, unsigned int cmd,
744 drm_agp_binding32_t __user *argp = (void __user *)arg;
745 struct drm_agp_binding request;
747 if (get_user(request.handle, &argp->handle))
750 return drm_ioctl_kernel(file, drm_agp_unbind_ioctl, &request,
751 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
753 #endif /* CONFIG_AGP */
755 typedef struct drm_scatter_gather32 {
756 u32 size; /**< In bytes -- will round to page boundary */
757 u32 handle; /**< Used for mapping / unmapping */
758 } drm_scatter_gather32_t;
760 static int compat_drm_sg_alloc(struct file *file, unsigned int cmd,
763 drm_scatter_gather32_t __user *argp = (void __user *)arg;
764 struct drm_scatter_gather request;
767 if (get_user(request.size, &argp->size))
770 err = drm_ioctl_kernel(file, drm_legacy_sg_alloc, &request,
771 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
775 /* XXX not sure about the handle conversion here... */
776 if (put_user(request.handle >> PAGE_SHIFT, &argp->handle))
782 static int compat_drm_sg_free(struct file *file, unsigned int cmd,
785 drm_scatter_gather32_t __user *argp = (void __user *)arg;
786 struct drm_scatter_gather request;
789 if (get_user(x, &argp->handle))
791 request.handle = x << PAGE_SHIFT;
792 return drm_ioctl_kernel(file, drm_legacy_sg_free, &request,
793 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
796 #if defined(CONFIG_X86) || defined(CONFIG_IA64)
797 typedef struct drm_update_draw32 {
798 drm_drawable_t handle;
801 /* 64-bit version has a 32-bit pad here */
802 u64 data; /**< Pointer */
803 } __attribute__((packed)) drm_update_draw32_t;
805 static int compat_drm_update_draw(struct file *file, unsigned int cmd,
808 drm_update_draw32_t update32;
809 if (copy_from_user(&update32, (void __user *)arg, sizeof(update32)))
812 return drm_ioctl_kernel(file, drm_noop, NULL,
813 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
817 struct drm_wait_vblank_request32 {
818 enum drm_vblank_seq_type type;
819 unsigned int sequence;
823 struct drm_wait_vblank_reply32 {
824 enum drm_vblank_seq_type type;
825 unsigned int sequence;
830 typedef union drm_wait_vblank32 {
831 struct drm_wait_vblank_request32 request;
832 struct drm_wait_vblank_reply32 reply;
833 } drm_wait_vblank32_t;
835 static int compat_drm_wait_vblank(struct file *file, unsigned int cmd,
838 drm_wait_vblank32_t __user *argp = (void __user *)arg;
839 drm_wait_vblank32_t req32;
840 union drm_wait_vblank req;
843 if (copy_from_user(&req32, argp, sizeof(req32)))
846 req.request.type = req32.request.type;
847 req.request.sequence = req32.request.sequence;
848 req.request.signal = req32.request.signal;
849 err = drm_ioctl_kernel(file, drm_wait_vblank, &req, DRM_UNLOCKED);
853 req32.reply.type = req.reply.type;
854 req32.reply.sequence = req.reply.sequence;
855 req32.reply.tval_sec = req.reply.tval_sec;
856 req32.reply.tval_usec = req.reply.tval_usec;
857 if (copy_to_user(argp, &req32, sizeof(req32)))
863 #if defined(CONFIG_X86) || defined(CONFIG_IA64)
864 typedef struct drm_mode_fb_cmd232 {
874 } __attribute__((packed)) drm_mode_fb_cmd232_t;
876 static int compat_drm_mode_addfb2(struct file *file, unsigned int cmd,
879 struct drm_mode_fb_cmd232 __user *argp = (void __user *)arg;
880 struct drm_mode_fb_cmd232 req32;
881 struct drm_mode_fb_cmd2 __user *req64;
885 if (copy_from_user(&req32, argp, sizeof(req32)))
888 req64 = compat_alloc_user_space(sizeof(*req64));
890 if (!access_ok(VERIFY_WRITE, req64, sizeof(*req64))
891 || __put_user(req32.width, &req64->width)
892 || __put_user(req32.height, &req64->height)
893 || __put_user(req32.pixel_format, &req64->pixel_format)
894 || __put_user(req32.flags, &req64->flags))
897 for (i = 0; i < 4; i++) {
898 if (__put_user(req32.handles[i], &req64->handles[i]))
900 if (__put_user(req32.pitches[i], &req64->pitches[i]))
902 if (__put_user(req32.offsets[i], &req64->offsets[i]))
904 if (__put_user(req32.modifier[i], &req64->modifier[i]))
908 err = drm_ioctl(file, DRM_IOCTL_MODE_ADDFB2, (unsigned long)req64);
912 if (__get_user(req32.fb_id, &req64->fb_id))
915 if (copy_to_user(argp, &req32, sizeof(req32)))
923 drm_ioctl_compat_t *fn;
925 } drm_compat_ioctls[] = {
926 #define DRM_IOCTL32_DEF(n, f) [DRM_IOCTL_NR(n##32)] = {.fn = f, .name = #n}
927 DRM_IOCTL32_DEF(DRM_IOCTL_VERSION, compat_drm_version),
928 DRM_IOCTL32_DEF(DRM_IOCTL_GET_UNIQUE, compat_drm_getunique),
929 DRM_IOCTL32_DEF(DRM_IOCTL_GET_MAP, compat_drm_getmap),
930 DRM_IOCTL32_DEF(DRM_IOCTL_GET_CLIENT, compat_drm_getclient),
931 DRM_IOCTL32_DEF(DRM_IOCTL_GET_STATS, compat_drm_getstats),
932 DRM_IOCTL32_DEF(DRM_IOCTL_SET_UNIQUE, compat_drm_setunique),
933 DRM_IOCTL32_DEF(DRM_IOCTL_ADD_MAP, compat_drm_addmap),
934 DRM_IOCTL32_DEF(DRM_IOCTL_ADD_BUFS, compat_drm_addbufs),
935 DRM_IOCTL32_DEF(DRM_IOCTL_MARK_BUFS, compat_drm_markbufs),
936 DRM_IOCTL32_DEF(DRM_IOCTL_INFO_BUFS, compat_drm_infobufs),
937 [DRM_IOCTL_NR(DRM_IOCTL_MAP_BUFS32)].fn = compat_drm_mapbufs,
938 DRM_IOCTL32_DEF(DRM_IOCTL_FREE_BUFS, compat_drm_freebufs),
939 [DRM_IOCTL_NR(DRM_IOCTL_RM_MAP32)].fn = compat_drm_rmmap,
940 DRM_IOCTL32_DEF(DRM_IOCTL_SET_SAREA_CTX, compat_drm_setsareactx),
941 DRM_IOCTL32_DEF(DRM_IOCTL_GET_SAREA_CTX, compat_drm_getsareactx),
942 DRM_IOCTL32_DEF(DRM_IOCTL_RES_CTX, compat_drm_resctx),
943 DRM_IOCTL32_DEF(DRM_IOCTL_DMA, compat_drm_dma),
944 #if IS_ENABLED(CONFIG_AGP)
945 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_ENABLE, compat_drm_agp_enable),
946 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_INFO, compat_drm_agp_info),
947 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_ALLOC, compat_drm_agp_alloc),
948 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_FREE, compat_drm_agp_free),
949 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_BIND, compat_drm_agp_bind),
950 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_UNBIND, compat_drm_agp_unbind),
952 DRM_IOCTL32_DEF(DRM_IOCTL_SG_ALLOC, compat_drm_sg_alloc),
953 DRM_IOCTL32_DEF(DRM_IOCTL_SG_FREE, compat_drm_sg_free),
954 #if defined(CONFIG_X86) || defined(CONFIG_IA64)
955 DRM_IOCTL32_DEF(DRM_IOCTL_UPDATE_DRAW, compat_drm_update_draw),
957 DRM_IOCTL32_DEF(DRM_IOCTL_WAIT_VBLANK, compat_drm_wait_vblank),
958 #if defined(CONFIG_X86) || defined(CONFIG_IA64)
959 [DRM_IOCTL_NR(DRM_IOCTL_MODE_ADDFB232)].fn = compat_drm_mode_addfb2,
964 * drm_compat_ioctl - 32bit IOCTL compatibility handler for DRM drivers
965 * @filp: file this ioctl is called on
966 * @cmd: ioctl cmd number
967 * @arg: user argument
969 * Compatibility handler for 32 bit userspace running on 64 kernels. All actual
970 * IOCTL handling is forwarded to drm_ioctl(), while marshalling structures as
971 * appropriate. Note that this only handles DRM core IOCTLs, if the driver has
972 * botched IOCTL itself, it must handle those by wrapping this function.
975 * Zero on success, negative error code on failure.
977 long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
979 unsigned int nr = DRM_IOCTL_NR(cmd);
980 drm_ioctl_compat_t *fn;
983 /* Assume that ioctls without an explicit compat routine will just
984 * work. This may not always be a good assumption, but it's better
985 * than always failing.
987 if (nr >= ARRAY_SIZE(drm_compat_ioctls))
988 return drm_ioctl(filp, cmd, arg);
990 fn = drm_compat_ioctls[nr].fn;
992 return drm_ioctl(filp, cmd, arg);
994 if (drm_compat_ioctls[nr].name) {
995 struct drm_file *file_priv = filp->private_data;
996 DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",
997 task_pid_nr(current),
998 (long)old_encode_dev(file_priv->minor->kdev->devt),
999 file_priv->authenticated,
1000 drm_compat_ioctls[nr].name);
1001 ret = (*fn) (filp, cmd, arg);
1003 DRM_DEBUG("ret = %d\n", ret);
1005 ret = (*fn) (filp, cmd, arg);
1009 EXPORT_SYMBOL(drm_compat_ioctl);