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"
37 #include "drm_crtc_internal.h"
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)
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)
53 #define DRM_IOCTL_RM_MAP32 DRM_IOW( 0x1b, drm_map32_t)
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)
58 #define DRM_IOCTL_RES_CTX32 DRM_IOWR(0x26, drm_ctx_res32_t)
59 #define DRM_IOCTL_DMA32 DRM_IOWR(0x29, drm_dma32_t)
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)
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)
71 #define DRM_IOCTL_UPDATE_DRAW32 DRM_IOW( 0x3f, drm_update_draw32_t)
73 #define DRM_IOCTL_WAIT_VBLANK32 DRM_IOWR(0x3a, drm_wait_vblank32_t)
75 #define DRM_IOCTL_MODE_ADDFB232 DRM_IOWR(0xb8, drm_mode_fb_cmd232_t)
77 typedef 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 */
89 static int compat_drm_version(struct file *file, unsigned int cmd,
96 if (copy_from_user(&v32, (void __user *)arg, sizeof(v32)))
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),
107 err = drm_ioctl_kernel(file, drm_version, &v,
108 DRM_UNLOCKED|DRM_RENDER_ALLOW);
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)))
123 typedef struct drm_unique32 {
124 u32 unique_len; /* Length of unique */
125 u32 unique; /* Unique name for driver instantiation */
128 static int compat_drm_getunique(struct file *file, unsigned int cmd,
132 struct drm_unique uq;
135 if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32)))
137 uq = (struct drm_unique){
138 .unique_len = uq32.unique_len,
139 .unique = compat_ptr(uq32.unique),
142 err = drm_ioctl_kernel(file, drm_getunique, &uq, DRM_UNLOCKED);
146 uq32.unique_len = uq.unique_len;
147 if (copy_to_user((void __user *)arg, &uq32, sizeof(uq32)))
152 static int compat_drm_setunique(struct file *file, unsigned int cmd,
159 #if IS_ENABLED(CONFIG_DRM_LEGACY)
160 typedef struct drm_map32 {
161 u32 offset; /* Requested physical address (0 for SAREA) */
162 u32 size; /* Requested physical size (bytes) */
163 enum drm_map_type type; /* Type of memory to map */
164 enum drm_map_flags flags; /* Flags */
165 u32 handle; /* User-space: "Handle" to pass to mmap() */
166 int mtrr; /* MTRR slot used */
169 static int compat_drm_getmap(struct file *file, unsigned int cmd,
172 drm_map32_t __user *argp = (void __user *)arg;
177 if (copy_from_user(&m32, argp, sizeof(m32)))
180 map.offset = m32.offset;
181 err = drm_ioctl_kernel(file, drm_legacy_getmap_ioctl, &map, DRM_UNLOCKED);
185 m32.offset = map.offset;
188 m32.flags = map.flags;
189 m32.handle = ptr_to_compat((void __user *)map.handle);
191 if (copy_to_user(argp, &m32, sizeof(m32)))
197 static int compat_drm_addmap(struct file *file, unsigned int cmd,
200 drm_map32_t __user *argp = (void __user *)arg;
205 if (copy_from_user(&m32, argp, sizeof(m32)))
208 map.offset = m32.offset;
211 map.flags = m32.flags;
213 err = drm_ioctl_kernel(file, drm_legacy_addmap_ioctl, &map,
214 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
218 m32.offset = map.offset;
220 m32.handle = ptr_to_compat((void __user *)map.handle);
221 if (map.handle != compat_ptr(m32.handle))
222 pr_err_ratelimited("compat_drm_addmap truncated handle %p for type %d offset %x\n",
223 map.handle, m32.type, m32.offset);
225 if (copy_to_user(argp, &m32, sizeof(m32)))
231 static int compat_drm_rmmap(struct file *file, unsigned int cmd,
234 drm_map32_t __user *argp = (void __user *)arg;
238 if (get_user(handle, &argp->handle))
240 map.handle = compat_ptr(handle);
241 return drm_ioctl_kernel(file, drm_legacy_rmmap_ioctl, &map, DRM_AUTH);
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 #if IS_ENABLED(CONFIG_DRM_LEGACY)
307 typedef struct drm_buf_desc32 {
308 int count; /* Number of buffers of this size */
309 int size; /* Size in bytes */
310 int low_mark; /* Low water mark */
311 int high_mark; /* High water mark */
313 u32 agp_start; /* Start address in the AGP aperture */
316 static int compat_drm_addbufs(struct file *file, unsigned int cmd,
319 drm_buf_desc32_t __user *argp = (void __user *)arg;
320 drm_buf_desc32_t desc32;
321 struct drm_buf_desc desc;
324 if (copy_from_user(&desc32, argp, sizeof(drm_buf_desc32_t)))
327 desc = (struct drm_buf_desc){
328 desc32.count, desc32.size, desc32.low_mark, desc32.high_mark,
329 desc32.flags, desc32.agp_start
332 err = drm_ioctl_kernel(file, drm_legacy_addbufs, &desc,
333 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
337 desc32 = (drm_buf_desc32_t){
338 desc.count, desc.size, desc.low_mark, desc.high_mark,
339 desc.flags, desc.agp_start
341 if (copy_to_user(argp, &desc32, sizeof(drm_buf_desc32_t)))
347 static int compat_drm_markbufs(struct file *file, unsigned int cmd,
350 drm_buf_desc32_t b32;
351 drm_buf_desc32_t __user *argp = (void __user *)arg;
352 struct drm_buf_desc buf;
354 if (copy_from_user(&b32, argp, sizeof(b32)))
358 buf.low_mark = b32.low_mark;
359 buf.high_mark = b32.high_mark;
361 return drm_ioctl_kernel(file, drm_legacy_markbufs, &buf,
362 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
365 typedef struct drm_buf_info32 {
366 int count; /**< Entries in list */
370 static int copy_one_buf32(void *data, int count, struct drm_buf_entry *from)
372 drm_buf_info32_t *request = data;
373 drm_buf_desc32_t __user *to = compat_ptr(request->list);
374 drm_buf_desc32_t v = {.count = from->buf_count,
375 .size = from->buf_size,
376 .low_mark = from->low_mark,
377 .high_mark = from->high_mark};
378 return copy_to_user(to + count, &v, offsetof(drm_buf_desc32_t, flags));
381 static int drm_legacy_infobufs32(struct drm_device *dev, void *data,
382 struct drm_file *file_priv)
384 drm_buf_info32_t *request = data;
385 return __drm_legacy_infobufs(dev, data, &request->count, copy_one_buf32);
388 static int compat_drm_infobufs(struct file *file, unsigned int cmd,
391 drm_buf_info32_t req32;
392 drm_buf_info32_t __user *argp = (void __user *)arg;
395 if (copy_from_user(&req32, argp, sizeof(req32)))
401 err = drm_ioctl_kernel(file, drm_legacy_infobufs32, &req32, DRM_AUTH);
405 if (put_user(req32.count, &argp->count))
411 typedef struct drm_buf_pub32 {
412 int idx; /**< Index into the master buffer list */
413 int total; /**< Buffer size */
414 int used; /**< Amount of buffer in use (for DMA) */
415 u32 address; /**< Address of buffer */
418 typedef struct drm_buf_map32 {
419 int count; /**< Length of the buffer list */
420 u32 virtual; /**< Mmap'd area in user-virtual */
421 u32 list; /**< Buffer information */
424 static int map_one_buf32(void *data, int idx, unsigned long virtual,
427 drm_buf_map32_t *request = data;
428 drm_buf_pub32_t __user *to = compat_ptr(request->list) + idx;
432 v.total = buf->total;
434 v.address = virtual + buf->offset;
435 if (copy_to_user(to, &v, sizeof(v)))
440 static int drm_legacy_mapbufs32(struct drm_device *dev, void *data,
441 struct drm_file *file_priv)
443 drm_buf_map32_t *request = data;
445 int err = __drm_legacy_mapbufs(dev, data, &request->count,
448 request->virtual = ptr_to_compat(v);
452 static int compat_drm_mapbufs(struct file *file, unsigned int cmd,
455 drm_buf_map32_t __user *argp = (void __user *)arg;
456 drm_buf_map32_t req32;
459 if (copy_from_user(&req32, argp, sizeof(req32)))
464 err = drm_ioctl_kernel(file, drm_legacy_mapbufs32, &req32, DRM_AUTH);
468 if (put_user(req32.count, &argp->count)
469 || put_user(req32.virtual, &argp->virtual))
475 typedef struct drm_buf_free32 {
480 static int compat_drm_freebufs(struct file *file, unsigned int cmd,
483 drm_buf_free32_t req32;
484 struct drm_buf_free request;
485 drm_buf_free32_t __user *argp = (void __user *)arg;
487 if (copy_from_user(&req32, argp, sizeof(req32)))
490 request.count = req32.count;
491 request.list = compat_ptr(req32.list);
492 return drm_ioctl_kernel(file, drm_legacy_freebufs, &request, DRM_AUTH);
495 typedef struct drm_ctx_priv_map32 {
496 unsigned int ctx_id; /**< Context requesting private mapping */
497 u32 handle; /**< Handle of map */
498 } drm_ctx_priv_map32_t;
500 static int compat_drm_setsareactx(struct file *file, unsigned int cmd,
503 drm_ctx_priv_map32_t req32;
504 struct drm_ctx_priv_map request;
505 drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
507 if (copy_from_user(&req32, argp, sizeof(req32)))
510 request.ctx_id = req32.ctx_id;
511 request.handle = compat_ptr(req32.handle);
512 return drm_ioctl_kernel(file, drm_legacy_setsareactx, &request,
513 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
516 static int compat_drm_getsareactx(struct file *file, unsigned int cmd,
519 struct drm_ctx_priv_map req;
520 drm_ctx_priv_map32_t req32;
521 drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
524 if (copy_from_user(&req32, argp, sizeof(req32)))
527 req.ctx_id = req32.ctx_id;
528 err = drm_ioctl_kernel(file, drm_legacy_getsareactx, &req, DRM_AUTH);
532 req32.handle = ptr_to_compat((void __user *)req.handle);
533 if (copy_to_user(argp, &req32, sizeof(req32)))
539 typedef struct drm_ctx_res32 {
544 static int compat_drm_resctx(struct file *file, unsigned int cmd,
547 drm_ctx_res32_t __user *argp = (void __user *)arg;
548 drm_ctx_res32_t res32;
549 struct drm_ctx_res res;
552 if (copy_from_user(&res32, argp, sizeof(res32)))
555 res.count = res32.count;
556 res.contexts = compat_ptr(res32.contexts);
557 err = drm_ioctl_kernel(file, drm_legacy_resctx, &res, DRM_AUTH);
561 res32.count = res.count;
562 if (copy_to_user(argp, &res32, sizeof(res32)))
568 typedef struct drm_dma32 {
569 int context; /**< Context handle */
570 int send_count; /**< Number of buffers to send */
571 u32 send_indices; /**< List of handles to buffers */
572 u32 send_sizes; /**< Lengths of data to send */
573 enum drm_dma_flags flags; /**< Flags */
574 int request_count; /**< Number of buffers requested */
575 int request_size; /**< Desired size for buffers */
576 u32 request_indices; /**< Buffer information */
578 int granted_count; /**< Number of buffers granted */
581 static int compat_drm_dma(struct file *file, unsigned int cmd,
585 drm_dma32_t __user *argp = (void __user *)arg;
589 if (copy_from_user(&d32, argp, sizeof(d32)))
592 d.context = d32.context;
593 d.send_count = d32.send_count;
594 d.send_indices = compat_ptr(d32.send_indices);
595 d.send_sizes = compat_ptr(d32.send_sizes);
597 d.request_count = d32.request_count;
598 d.request_indices = compat_ptr(d32.request_indices);
599 d.request_sizes = compat_ptr(d32.request_sizes);
600 err = drm_ioctl_kernel(file, drm_legacy_dma_ioctl, &d, DRM_AUTH);
604 if (put_user(d.request_size, &argp->request_size)
605 || 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 #if IS_ENABLED(CONFIG_DRM_LEGACY)
756 typedef struct drm_scatter_gather32 {
757 u32 size; /**< In bytes -- will round to page boundary */
758 u32 handle; /**< Used for mapping / unmapping */
759 } drm_scatter_gather32_t;
761 static int compat_drm_sg_alloc(struct file *file, unsigned int cmd,
764 drm_scatter_gather32_t __user *argp = (void __user *)arg;
765 struct drm_scatter_gather request;
768 if (get_user(request.size, &argp->size))
771 err = drm_ioctl_kernel(file, drm_legacy_sg_alloc, &request,
772 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
776 /* XXX not sure about the handle conversion here... */
777 if (put_user(request.handle >> PAGE_SHIFT, &argp->handle))
783 static int compat_drm_sg_free(struct file *file, unsigned int cmd,
786 drm_scatter_gather32_t __user *argp = (void __user *)arg;
787 struct drm_scatter_gather request;
790 if (get_user(x, &argp->handle))
792 request.handle = x << PAGE_SHIFT;
793 return drm_ioctl_kernel(file, drm_legacy_sg_free, &request,
794 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
797 #if defined(CONFIG_X86)
798 typedef struct drm_update_draw32 {
799 drm_drawable_t handle;
802 /* 64-bit version has a 32-bit pad here */
803 u64 data; /**< Pointer */
804 } __attribute__((packed)) drm_update_draw32_t;
806 static int compat_drm_update_draw(struct file *file, unsigned int cmd,
809 drm_update_draw32_t update32;
810 if (copy_from_user(&update32, (void __user *)arg, sizeof(update32)))
813 return drm_ioctl_kernel(file, drm_noop, NULL,
814 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
818 struct drm_wait_vblank_request32 {
819 enum drm_vblank_seq_type type;
820 unsigned int sequence;
824 struct drm_wait_vblank_reply32 {
825 enum drm_vblank_seq_type type;
826 unsigned int sequence;
831 typedef union drm_wait_vblank32 {
832 struct drm_wait_vblank_request32 request;
833 struct drm_wait_vblank_reply32 reply;
834 } drm_wait_vblank32_t;
836 static int compat_drm_wait_vblank(struct file *file, unsigned int cmd,
839 drm_wait_vblank32_t __user *argp = (void __user *)arg;
840 drm_wait_vblank32_t req32;
841 union drm_wait_vblank req;
844 if (copy_from_user(&req32, argp, sizeof(req32)))
847 req.request.type = req32.request.type;
848 req.request.sequence = req32.request.sequence;
849 req.request.signal = req32.request.signal;
850 err = drm_ioctl_kernel(file, drm_wait_vblank_ioctl, &req, DRM_UNLOCKED);
854 req32.reply.type = req.reply.type;
855 req32.reply.sequence = req.reply.sequence;
856 req32.reply.tval_sec = req.reply.tval_sec;
857 req32.reply.tval_usec = req.reply.tval_usec;
858 if (copy_to_user(argp, &req32, sizeof(req32)))
864 #if defined(CONFIG_X86)
865 typedef struct drm_mode_fb_cmd232 {
875 } __attribute__((packed)) drm_mode_fb_cmd232_t;
877 static int compat_drm_mode_addfb2(struct file *file, unsigned int cmd,
880 struct drm_mode_fb_cmd232 __user *argp = (void __user *)arg;
881 struct drm_mode_fb_cmd2 req64;
884 if (copy_from_user(&req64, argp,
885 offsetof(drm_mode_fb_cmd232_t, modifier)))
888 if (copy_from_user(&req64.modifier, &argp->modifier,
889 sizeof(req64.modifier)))
892 err = drm_ioctl_kernel(file, drm_mode_addfb2, &req64,
897 if (put_user(req64.fb_id, &argp->fb_id))
905 drm_ioctl_compat_t *fn;
907 } drm_compat_ioctls[] = {
908 #define DRM_IOCTL32_DEF(n, f) [DRM_IOCTL_NR(n##32)] = {.fn = f, .name = #n}
909 DRM_IOCTL32_DEF(DRM_IOCTL_VERSION, compat_drm_version),
910 DRM_IOCTL32_DEF(DRM_IOCTL_GET_UNIQUE, compat_drm_getunique),
911 #if IS_ENABLED(CONFIG_DRM_LEGACY)
912 DRM_IOCTL32_DEF(DRM_IOCTL_GET_MAP, compat_drm_getmap),
914 DRM_IOCTL32_DEF(DRM_IOCTL_GET_CLIENT, compat_drm_getclient),
915 DRM_IOCTL32_DEF(DRM_IOCTL_GET_STATS, compat_drm_getstats),
916 DRM_IOCTL32_DEF(DRM_IOCTL_SET_UNIQUE, compat_drm_setunique),
917 #if IS_ENABLED(CONFIG_DRM_LEGACY)
918 DRM_IOCTL32_DEF(DRM_IOCTL_ADD_MAP, compat_drm_addmap),
919 DRM_IOCTL32_DEF(DRM_IOCTL_ADD_BUFS, compat_drm_addbufs),
920 DRM_IOCTL32_DEF(DRM_IOCTL_MARK_BUFS, compat_drm_markbufs),
921 DRM_IOCTL32_DEF(DRM_IOCTL_INFO_BUFS, compat_drm_infobufs),
922 DRM_IOCTL32_DEF(DRM_IOCTL_MAP_BUFS, compat_drm_mapbufs),
923 DRM_IOCTL32_DEF(DRM_IOCTL_FREE_BUFS, compat_drm_freebufs),
924 DRM_IOCTL32_DEF(DRM_IOCTL_RM_MAP, compat_drm_rmmap),
925 DRM_IOCTL32_DEF(DRM_IOCTL_SET_SAREA_CTX, compat_drm_setsareactx),
926 DRM_IOCTL32_DEF(DRM_IOCTL_GET_SAREA_CTX, compat_drm_getsareactx),
927 DRM_IOCTL32_DEF(DRM_IOCTL_RES_CTX, compat_drm_resctx),
928 DRM_IOCTL32_DEF(DRM_IOCTL_DMA, compat_drm_dma),
930 #if IS_ENABLED(CONFIG_AGP)
931 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_ENABLE, compat_drm_agp_enable),
932 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_INFO, compat_drm_agp_info),
933 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_ALLOC, compat_drm_agp_alloc),
934 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_FREE, compat_drm_agp_free),
935 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_BIND, compat_drm_agp_bind),
936 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_UNBIND, compat_drm_agp_unbind),
938 #if IS_ENABLED(CONFIG_DRM_LEGACY)
939 DRM_IOCTL32_DEF(DRM_IOCTL_SG_ALLOC, compat_drm_sg_alloc),
940 DRM_IOCTL32_DEF(DRM_IOCTL_SG_FREE, compat_drm_sg_free),
942 #if defined(CONFIG_X86) || defined(CONFIG_IA64)
943 DRM_IOCTL32_DEF(DRM_IOCTL_UPDATE_DRAW, compat_drm_update_draw),
945 DRM_IOCTL32_DEF(DRM_IOCTL_WAIT_VBLANK, compat_drm_wait_vblank),
946 #if defined(CONFIG_X86) || defined(CONFIG_IA64)
947 DRM_IOCTL32_DEF(DRM_IOCTL_MODE_ADDFB2, compat_drm_mode_addfb2),
952 * drm_compat_ioctl - 32bit IOCTL compatibility handler for DRM drivers
953 * @filp: file this ioctl is called on
954 * @cmd: ioctl cmd number
955 * @arg: user argument
957 * Compatibility handler for 32 bit userspace running on 64 kernels. All actual
958 * IOCTL handling is forwarded to drm_ioctl(), while marshalling structures as
959 * appropriate. Note that this only handles DRM core IOCTLs, if the driver has
960 * botched IOCTL itself, it must handle those by wrapping this function.
963 * Zero on success, negative error code on failure.
965 long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
967 unsigned int nr = DRM_IOCTL_NR(cmd);
968 struct drm_file *file_priv = filp->private_data;
969 drm_ioctl_compat_t *fn;
972 /* Assume that ioctls without an explicit compat routine will just
973 * work. This may not always be a good assumption, but it's better
974 * than always failing.
976 if (nr >= ARRAY_SIZE(drm_compat_ioctls))
977 return drm_ioctl(filp, cmd, arg);
979 fn = drm_compat_ioctls[nr].fn;
981 return drm_ioctl(filp, cmd, arg);
983 DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",
984 task_pid_nr(current),
985 (long)old_encode_dev(file_priv->minor->kdev->devt),
986 file_priv->authenticated,
987 drm_compat_ioctls[nr].name);
988 ret = (*fn)(filp, cmd, arg);
990 DRM_DEBUG("ret = %d\n", ret);
993 EXPORT_SYMBOL(drm_compat_ioctl);