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 memset(&v, 0, sizeof(v));
101 v = (struct drm_version) {
102 .name_len = v32.name_len,
103 .name = compat_ptr(v32.name),
104 .date_len = v32.date_len,
105 .date = compat_ptr(v32.date),
106 .desc_len = v32.desc_len,
107 .desc = compat_ptr(v32.desc),
109 err = drm_ioctl_kernel(file, drm_version, &v,
110 DRM_UNLOCKED|DRM_RENDER_ALLOW|DRM_CONTROL_ALLOW);
114 v32.version_major = v.version_major;
115 v32.version_minor = v.version_minor;
116 v32.version_patchlevel = v.version_patchlevel;
117 v32.name_len = v.name_len;
118 v32.date_len = v.date_len;
119 v32.desc_len = v.desc_len;
120 if (copy_to_user((void __user *)arg, &v32, sizeof(v32)))
125 typedef struct drm_unique32 {
126 u32 unique_len; /* Length of unique */
127 u32 unique; /* Unique name for driver instantiation */
130 static int compat_drm_getunique(struct file *file, unsigned int cmd,
134 struct drm_unique uq;
137 if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32)))
140 memset(&uq, 0, sizeof(uq));
142 uq = (struct drm_unique){
143 .unique_len = uq32.unique_len,
144 .unique = compat_ptr(uq32.unique),
147 err = drm_ioctl_kernel(file, drm_getunique, &uq, DRM_UNLOCKED);
151 uq32.unique_len = uq.unique_len;
152 if (copy_to_user((void __user *)arg, &uq32, sizeof(uq32)))
157 static int compat_drm_setunique(struct file *file, unsigned int cmd,
164 typedef struct drm_map32 {
165 u32 offset; /* Requested physical address (0 for SAREA) */
166 u32 size; /* Requested physical size (bytes) */
167 enum drm_map_type type; /* Type of memory to map */
168 enum drm_map_flags flags; /* Flags */
169 u32 handle; /* User-space: "Handle" to pass to mmap() */
170 int mtrr; /* MTRR slot used */
173 static int compat_drm_getmap(struct file *file, unsigned int cmd,
176 drm_map32_t __user *argp = (void __user *)arg;
181 if (copy_from_user(&m32, argp, sizeof(m32)))
184 map.offset = m32.offset;
185 err = drm_ioctl_kernel(file, drm_legacy_getmap_ioctl, &map, DRM_UNLOCKED);
189 m32.offset = map.offset;
192 m32.flags = map.flags;
193 m32.handle = ptr_to_compat(map.handle);
195 if (copy_to_user(argp, &m32, sizeof(m32)))
201 static int compat_drm_addmap(struct file *file, unsigned int cmd,
204 drm_map32_t __user *argp = (void __user *)arg;
209 if (copy_from_user(&m32, argp, sizeof(m32)))
212 map.offset = m32.offset;
215 map.flags = m32.flags;
217 err = drm_ioctl_kernel(file, drm_legacy_addmap_ioctl, &map,
218 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
222 m32.offset = map.offset;
224 m32.handle = ptr_to_compat(map.handle);
225 if (map.handle != compat_ptr(m32.handle))
226 pr_err_ratelimited("compat_drm_addmap truncated handle %p for type %d offset %x\n",
227 map.handle, m32.type, m32.offset);
229 if (copy_to_user(argp, &m32, sizeof(m32)))
235 static int compat_drm_rmmap(struct file *file, unsigned int cmd,
238 drm_map32_t __user *argp = (void __user *)arg;
242 if (get_user(handle, &argp->handle))
244 map.handle = compat_ptr(handle);
245 return drm_ioctl_kernel(file, drm_legacy_rmmap_ioctl, &map, DRM_AUTH);
248 typedef struct drm_client32 {
249 int idx; /* Which client desired? */
250 int auth; /* Is client authenticated? */
251 u32 pid; /* Process ID */
252 u32 uid; /* User ID */
253 u32 magic; /* Magic */
254 u32 iocs; /* Ioctl count */
257 static int compat_drm_getclient(struct file *file, unsigned int cmd,
261 drm_client32_t __user *argp = (void __user *)arg;
262 struct drm_client client;
265 if (copy_from_user(&c32, argp, sizeof(c32)))
268 memset(&client, 0, sizeof(client));
270 client.idx = c32.idx;
272 err = drm_ioctl_kernel(file, drm_getclient, &client, DRM_UNLOCKED);
276 c32.idx = client.idx;
277 c32.auth = client.auth;
278 c32.pid = client.pid;
279 c32.uid = client.uid;
280 c32.magic = client.magic;
281 c32.iocs = client.iocs;
283 if (copy_to_user(argp, &c32, sizeof(c32)))
288 typedef struct drm_stats32 {
292 enum drm_stat_type type;
296 static int compat_drm_getstats(struct file *file, unsigned int cmd,
299 drm_stats32_t __user *argp = (void __user *)arg;
302 err = drm_ioctl_kernel(file, drm_noop, NULL, DRM_UNLOCKED);
306 if (clear_user(argp, sizeof(drm_stats32_t)))
311 typedef struct drm_buf_desc32 {
312 int count; /* Number of buffers of this size */
313 int size; /* Size in bytes */
314 int low_mark; /* Low water mark */
315 int high_mark; /* High water mark */
317 u32 agp_start; /* Start address in the AGP aperture */
320 static int compat_drm_addbufs(struct file *file, unsigned int cmd,
323 drm_buf_desc32_t __user *argp = (void __user *)arg;
324 drm_buf_desc32_t desc32;
325 struct drm_buf_desc desc;
328 if (copy_from_user(&desc32, argp, sizeof(drm_buf_desc32_t)))
331 desc = (struct drm_buf_desc){
332 desc32.count, desc32.size, desc32.low_mark, desc32.high_mark,
333 desc32.flags, desc32.agp_start
336 err = drm_ioctl_kernel(file, drm_legacy_addbufs, &desc,
337 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
341 desc32 = (drm_buf_desc32_t){
342 desc.count, desc.size, desc.low_mark, desc.high_mark,
343 desc.flags, desc.agp_start
345 if (copy_to_user(argp, &desc32, sizeof(drm_buf_desc32_t)))
351 static int compat_drm_markbufs(struct file *file, unsigned int cmd,
354 drm_buf_desc32_t b32;
355 drm_buf_desc32_t __user *argp = (void __user *)arg;
356 struct drm_buf_desc buf;
358 if (copy_from_user(&b32, argp, sizeof(b32)))
362 buf.low_mark = b32.low_mark;
363 buf.high_mark = b32.high_mark;
365 return drm_ioctl_kernel(file, drm_legacy_markbufs, &buf,
366 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
369 typedef struct drm_buf_info32 {
370 int count; /**< Entries in list */
374 static int copy_one_buf32(void *data, int count, struct drm_buf_entry *from)
376 drm_buf_info32_t *request = data;
377 drm_buf_desc32_t __user *to = compat_ptr(request->list);
378 drm_buf_desc32_t v = {.count = from->buf_count,
379 .size = from->buf_size,
380 .low_mark = from->low_mark,
381 .high_mark = from->high_mark};
383 if (copy_to_user(to + count, &v, offsetof(drm_buf_desc32_t, flags)))
388 static int drm_legacy_infobufs32(struct drm_device *dev, void *data,
389 struct drm_file *file_priv)
391 drm_buf_info32_t *request = data;
392 return __drm_legacy_infobufs(dev, data, &request->count, copy_one_buf32);
395 static int compat_drm_infobufs(struct file *file, unsigned int cmd,
398 drm_buf_info32_t req32;
399 drm_buf_info32_t __user *argp = (void __user *)arg;
402 if (copy_from_user(&req32, argp, sizeof(req32)))
408 err = drm_ioctl_kernel(file, drm_legacy_infobufs32, &req32, DRM_AUTH);
412 if (put_user(req32.count, &argp->count))
418 typedef struct drm_buf_pub32 {
419 int idx; /**< Index into the master buffer list */
420 int total; /**< Buffer size */
421 int used; /**< Amount of buffer in use (for DMA) */
422 u32 address; /**< Address of buffer */
425 typedef struct drm_buf_map32 {
426 int count; /**< Length of the buffer list */
427 u32 virtual; /**< Mmap'd area in user-virtual */
428 u32 list; /**< Buffer information */
431 static int map_one_buf32(void *data, int idx, unsigned long virtual,
434 drm_buf_map32_t *request = data;
435 drm_buf_pub32_t __user *to = compat_ptr(request->list) + idx;
439 v.total = buf->total;
441 v.address = virtual + buf->offset;
442 if (copy_to_user(to, &v, sizeof(v)))
447 static int drm_legacy_mapbufs32(struct drm_device *dev, void *data,
448 struct drm_file *file_priv)
450 drm_buf_map32_t *request = data;
452 int err = __drm_legacy_mapbufs(dev, data, &request->count,
455 request->virtual = ptr_to_compat(v);
459 static int compat_drm_mapbufs(struct file *file, unsigned int cmd,
462 drm_buf_map32_t __user *argp = (void __user *)arg;
463 drm_buf_map32_t req32;
466 if (copy_from_user(&req32, argp, sizeof(req32)))
471 err = drm_ioctl_kernel(file, drm_legacy_mapbufs32, &req32, DRM_AUTH);
475 if (put_user(req32.count, &argp->count)
476 || put_user(req32.virtual, &argp->virtual))
482 typedef struct drm_buf_free32 {
487 static int compat_drm_freebufs(struct file *file, unsigned int cmd,
490 drm_buf_free32_t req32;
491 struct drm_buf_free request;
492 drm_buf_free32_t __user *argp = (void __user *)arg;
494 if (copy_from_user(&req32, argp, sizeof(req32)))
497 request.count = req32.count;
498 request.list = compat_ptr(req32.list);
499 return drm_ioctl_kernel(file, drm_legacy_freebufs, &request, DRM_AUTH);
502 typedef struct drm_ctx_priv_map32 {
503 unsigned int ctx_id; /**< Context requesting private mapping */
504 u32 handle; /**< Handle of map */
505 } drm_ctx_priv_map32_t;
507 static int compat_drm_setsareactx(struct file *file, unsigned int cmd,
510 drm_ctx_priv_map32_t req32;
511 struct drm_ctx_priv_map request;
512 drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
514 if (copy_from_user(&req32, argp, sizeof(req32)))
517 request.ctx_id = req32.ctx_id;
518 request.handle = compat_ptr(req32.handle);
519 return drm_ioctl_kernel(file, drm_legacy_setsareactx, &request,
520 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
523 static int compat_drm_getsareactx(struct file *file, unsigned int cmd,
526 struct drm_ctx_priv_map req;
527 drm_ctx_priv_map32_t req32;
528 drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
531 if (copy_from_user(&req32, argp, sizeof(req32)))
534 req.ctx_id = req32.ctx_id;
535 err = drm_ioctl_kernel(file, drm_legacy_getsareactx, &req, DRM_AUTH);
539 req32.handle = ptr_to_compat(req.handle);
540 if (copy_to_user(argp, &req32, sizeof(req32)))
546 typedef struct drm_ctx_res32 {
551 static int compat_drm_resctx(struct file *file, unsigned int cmd,
554 drm_ctx_res32_t __user *argp = (void __user *)arg;
555 drm_ctx_res32_t res32;
556 struct drm_ctx_res res;
559 if (copy_from_user(&res32, argp, sizeof(res32)))
562 res.count = res32.count;
563 res.contexts = compat_ptr(res32.contexts);
564 err = drm_ioctl_kernel(file, drm_legacy_resctx, &res, DRM_AUTH);
568 res32.count = res.count;
569 if (copy_to_user(argp, &res32, sizeof(res32)))
575 typedef struct drm_dma32 {
576 int context; /**< Context handle */
577 int send_count; /**< Number of buffers to send */
578 u32 send_indices; /**< List of handles to buffers */
579 u32 send_sizes; /**< Lengths of data to send */
580 enum drm_dma_flags flags; /**< Flags */
581 int request_count; /**< Number of buffers requested */
582 int request_size; /**< Desired size for buffers */
583 u32 request_indices; /**< Buffer information */
585 int granted_count; /**< Number of buffers granted */
588 static int compat_drm_dma(struct file *file, unsigned int cmd,
592 drm_dma32_t __user *argp = (void __user *)arg;
596 if (copy_from_user(&d32, argp, sizeof(d32)))
599 d.context = d32.context;
600 d.send_count = d32.send_count;
601 d.send_indices = compat_ptr(d32.send_indices);
602 d.send_sizes = compat_ptr(d32.send_sizes);
604 d.request_count = d32.request_count;
605 d.request_indices = compat_ptr(d32.request_indices);
606 d.request_sizes = compat_ptr(d32.request_sizes);
607 err = drm_ioctl_kernel(file, drm_legacy_dma_ioctl, &d, DRM_AUTH);
611 if (put_user(d.request_size, &argp->request_size)
612 || put_user(d.granted_count, &argp->granted_count))
618 #if IS_ENABLED(CONFIG_AGP)
619 typedef struct drm_agp_mode32 {
620 u32 mode; /**< AGP mode */
623 static int compat_drm_agp_enable(struct file *file, unsigned int cmd,
626 drm_agp_mode32_t __user *argp = (void __user *)arg;
627 struct drm_agp_mode mode;
629 if (get_user(mode.mode, &argp->mode))
632 return drm_ioctl_kernel(file, drm_agp_enable_ioctl, &mode,
633 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
636 typedef struct drm_agp_info32 {
637 int agp_version_major;
638 int agp_version_minor;
640 u32 aperture_base; /* physical address */
641 u32 aperture_size; /* bytes */
642 u32 memory_allowed; /* bytes */
645 /* PCI information */
646 unsigned short id_vendor;
647 unsigned short id_device;
650 static int compat_drm_agp_info(struct file *file, unsigned int cmd,
653 drm_agp_info32_t __user *argp = (void __user *)arg;
654 drm_agp_info32_t i32;
655 struct drm_agp_info info;
658 err = drm_ioctl_kernel(file, drm_agp_info_ioctl, &info, DRM_AUTH);
662 i32.agp_version_major = info.agp_version_major;
663 i32.agp_version_minor = info.agp_version_minor;
664 i32.mode = info.mode;
665 i32.aperture_base = info.aperture_base;
666 i32.aperture_size = info.aperture_size;
667 i32.memory_allowed = info.memory_allowed;
668 i32.memory_used = info.memory_used;
669 i32.id_vendor = info.id_vendor;
670 i32.id_device = info.id_device;
671 if (copy_to_user(argp, &i32, sizeof(i32)))
677 typedef struct drm_agp_buffer32 {
678 u32 size; /**< In bytes -- will round to page boundary */
679 u32 handle; /**< Used for binding / unbinding */
680 u32 type; /**< Type of memory to allocate */
681 u32 physical; /**< Physical used by i810 */
682 } drm_agp_buffer32_t;
684 static int compat_drm_agp_alloc(struct file *file, unsigned int cmd,
687 drm_agp_buffer32_t __user *argp = (void __user *)arg;
688 drm_agp_buffer32_t req32;
689 struct drm_agp_buffer request;
692 if (copy_from_user(&req32, argp, sizeof(req32)))
695 request.size = req32.size;
696 request.type = req32.type;
697 err = drm_ioctl_kernel(file, drm_agp_alloc_ioctl, &request,
698 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
702 req32.handle = request.handle;
703 req32.physical = request.physical;
704 if (copy_to_user(argp, &req32, sizeof(req32))) {
705 drm_ioctl_kernel(file, drm_agp_free_ioctl, &request,
706 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
713 static int compat_drm_agp_free(struct file *file, unsigned int cmd,
716 drm_agp_buffer32_t __user *argp = (void __user *)arg;
717 struct drm_agp_buffer request;
719 if (get_user(request.handle, &argp->handle))
722 return drm_ioctl_kernel(file, drm_agp_free_ioctl, &request,
723 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
726 typedef struct drm_agp_binding32 {
727 u32 handle; /**< From drm_agp_buffer */
728 u32 offset; /**< In bytes -- will round to page boundary */
729 } drm_agp_binding32_t;
731 static int compat_drm_agp_bind(struct file *file, unsigned int cmd,
734 drm_agp_binding32_t __user *argp = (void __user *)arg;
735 drm_agp_binding32_t req32;
736 struct drm_agp_binding request;
738 if (copy_from_user(&req32, argp, sizeof(req32)))
741 request.handle = req32.handle;
742 request.offset = req32.offset;
743 return drm_ioctl_kernel(file, drm_agp_bind_ioctl, &request,
744 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
747 static int compat_drm_agp_unbind(struct file *file, unsigned int cmd,
750 drm_agp_binding32_t __user *argp = (void __user *)arg;
751 struct drm_agp_binding request;
753 if (get_user(request.handle, &argp->handle))
756 return drm_ioctl_kernel(file, drm_agp_unbind_ioctl, &request,
757 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
759 #endif /* CONFIG_AGP */
761 typedef struct drm_scatter_gather32 {
762 u32 size; /**< In bytes -- will round to page boundary */
763 u32 handle; /**< Used for mapping / unmapping */
764 } drm_scatter_gather32_t;
766 static int compat_drm_sg_alloc(struct file *file, unsigned int cmd,
769 drm_scatter_gather32_t __user *argp = (void __user *)arg;
770 struct drm_scatter_gather request;
773 if (get_user(request.size, &argp->size))
776 err = drm_ioctl_kernel(file, drm_legacy_sg_alloc, &request,
777 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
781 /* XXX not sure about the handle conversion here... */
782 if (put_user(request.handle >> PAGE_SHIFT, &argp->handle))
788 static int compat_drm_sg_free(struct file *file, unsigned int cmd,
791 drm_scatter_gather32_t __user *argp = (void __user *)arg;
792 struct drm_scatter_gather request;
795 if (get_user(x, &argp->handle))
797 request.handle = x << PAGE_SHIFT;
798 return drm_ioctl_kernel(file, drm_legacy_sg_free, &request,
799 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
802 #if defined(CONFIG_X86)
803 typedef struct drm_update_draw32 {
804 drm_drawable_t handle;
807 /* 64-bit version has a 32-bit pad here */
808 u64 data; /**< Pointer */
809 } __attribute__((packed)) drm_update_draw32_t;
811 static int compat_drm_update_draw(struct file *file, unsigned int cmd,
814 drm_update_draw32_t update32;
815 if (copy_from_user(&update32, (void __user *)arg, sizeof(update32)))
818 return drm_ioctl_kernel(file, drm_noop, NULL,
819 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
823 struct drm_wait_vblank_request32 {
824 enum drm_vblank_seq_type type;
825 unsigned int sequence;
829 struct drm_wait_vblank_reply32 {
830 enum drm_vblank_seq_type type;
831 unsigned int sequence;
836 typedef union drm_wait_vblank32 {
837 struct drm_wait_vblank_request32 request;
838 struct drm_wait_vblank_reply32 reply;
839 } drm_wait_vblank32_t;
841 static int compat_drm_wait_vblank(struct file *file, unsigned int cmd,
844 drm_wait_vblank32_t __user *argp = (void __user *)arg;
845 drm_wait_vblank32_t req32;
846 union drm_wait_vblank req;
849 if (copy_from_user(&req32, argp, sizeof(req32)))
852 memset(&req, 0, sizeof(req));
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);
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)))
869 #if defined(CONFIG_X86)
870 typedef struct drm_mode_fb_cmd232 {
880 } __attribute__((packed)) drm_mode_fb_cmd232_t;
882 static int compat_drm_mode_addfb2(struct file *file, unsigned int cmd,
885 struct drm_mode_fb_cmd232 __user *argp = (void __user *)arg;
886 struct drm_mode_fb_cmd2 req64;
889 memset(&req64, 0, sizeof(req64));
891 if (copy_from_user(&req64, argp,
892 offsetof(drm_mode_fb_cmd232_t, modifier)))
895 if (copy_from_user(&req64.modifier, &argp->modifier,
896 sizeof(req64.modifier)))
899 err = drm_ioctl_kernel(file, drm_mode_addfb2, &req64,
900 DRM_CONTROL_ALLOW|DRM_UNLOCKED);
904 if (put_user(req64.fb_id, &argp->fb_id))
912 drm_ioctl_compat_t *fn;
914 } drm_compat_ioctls[] = {
915 #define DRM_IOCTL32_DEF(n, f) [DRM_IOCTL_NR(n##32)] = {.fn = f, .name = #n}
916 DRM_IOCTL32_DEF(DRM_IOCTL_VERSION, compat_drm_version),
917 DRM_IOCTL32_DEF(DRM_IOCTL_GET_UNIQUE, compat_drm_getunique),
918 DRM_IOCTL32_DEF(DRM_IOCTL_GET_MAP, compat_drm_getmap),
919 DRM_IOCTL32_DEF(DRM_IOCTL_GET_CLIENT, compat_drm_getclient),
920 DRM_IOCTL32_DEF(DRM_IOCTL_GET_STATS, compat_drm_getstats),
921 DRM_IOCTL32_DEF(DRM_IOCTL_SET_UNIQUE, compat_drm_setunique),
922 DRM_IOCTL32_DEF(DRM_IOCTL_ADD_MAP, compat_drm_addmap),
923 DRM_IOCTL32_DEF(DRM_IOCTL_ADD_BUFS, compat_drm_addbufs),
924 DRM_IOCTL32_DEF(DRM_IOCTL_MARK_BUFS, compat_drm_markbufs),
925 DRM_IOCTL32_DEF(DRM_IOCTL_INFO_BUFS, compat_drm_infobufs),
926 DRM_IOCTL32_DEF(DRM_IOCTL_MAP_BUFS, compat_drm_mapbufs),
927 DRM_IOCTL32_DEF(DRM_IOCTL_FREE_BUFS, compat_drm_freebufs),
928 DRM_IOCTL32_DEF(DRM_IOCTL_RM_MAP, compat_drm_rmmap),
929 DRM_IOCTL32_DEF(DRM_IOCTL_SET_SAREA_CTX, compat_drm_setsareactx),
930 DRM_IOCTL32_DEF(DRM_IOCTL_GET_SAREA_CTX, compat_drm_getsareactx),
931 DRM_IOCTL32_DEF(DRM_IOCTL_RES_CTX, compat_drm_resctx),
932 DRM_IOCTL32_DEF(DRM_IOCTL_DMA, compat_drm_dma),
933 #if IS_ENABLED(CONFIG_AGP)
934 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_ENABLE, compat_drm_agp_enable),
935 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_INFO, compat_drm_agp_info),
936 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_ALLOC, compat_drm_agp_alloc),
937 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_FREE, compat_drm_agp_free),
938 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_BIND, compat_drm_agp_bind),
939 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_UNBIND, compat_drm_agp_unbind),
941 DRM_IOCTL32_DEF(DRM_IOCTL_SG_ALLOC, compat_drm_sg_alloc),
942 DRM_IOCTL32_DEF(DRM_IOCTL_SG_FREE, compat_drm_sg_free),
943 #if defined(CONFIG_X86) || defined(CONFIG_IA64)
944 DRM_IOCTL32_DEF(DRM_IOCTL_UPDATE_DRAW, compat_drm_update_draw),
946 DRM_IOCTL32_DEF(DRM_IOCTL_WAIT_VBLANK, compat_drm_wait_vblank),
947 #if defined(CONFIG_X86) || defined(CONFIG_IA64)
948 DRM_IOCTL32_DEF(DRM_IOCTL_MODE_ADDFB2, compat_drm_mode_addfb2),
953 * drm_compat_ioctl - 32bit IOCTL compatibility handler for DRM drivers
954 * @filp: file this ioctl is called on
955 * @cmd: ioctl cmd number
956 * @arg: user argument
958 * Compatibility handler for 32 bit userspace running on 64 kernels. All actual
959 * IOCTL handling is forwarded to drm_ioctl(), while marshalling structures as
960 * appropriate. Note that this only handles DRM core IOCTLs, if the driver has
961 * botched IOCTL itself, it must handle those by wrapping this function.
964 * Zero on success, negative error code on failure.
966 long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
968 unsigned int nr = DRM_IOCTL_NR(cmd);
969 struct drm_file *file_priv = filp->private_data;
970 drm_ioctl_compat_t *fn;
973 /* Assume that ioctls without an explicit compat routine will just
974 * work. This may not always be a good assumption, but it's better
975 * than always failing.
977 if (nr >= ARRAY_SIZE(drm_compat_ioctls))
978 return drm_ioctl(filp, cmd, arg);
980 fn = drm_compat_ioctls[nr].fn;
982 return drm_ioctl(filp, cmd, arg);
984 DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",
985 task_pid_nr(current),
986 (long)old_encode_dev(file_priv->minor->kdev->devt),
987 file_priv->authenticated,
988 drm_compat_ioctls[nr].name);
989 ret = (*fn)(filp, cmd, arg);
991 DRM_DEBUG("ret = %d\n", ret);
994 EXPORT_SYMBOL(drm_compat_ioctl);