2 * (C) Copyright IBM Corporation 2007
3 * Copyright (C) Paul Mackerras 2005.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * on the rights to use, copy, modify, merge, publish, distribute, sub
10 * license, and/or sell copies of the Software, and to permit persons to whom
11 * the Software is furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice (including the next
14 * paragraph) shall be included in all copies or substantial portions of the
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23 * OTHER DEALINGS IN THE SOFTWARE.
26 * Ian Romanick <idr@us.ibm.com>
29 #include <linux/compat.h>
36 /* This is copied from drm_ioc32.c.
39 u32 offset; /**< Requested physical address (0 for SAREA)*/
40 u32 size; /**< Requested physical size (bytes) */
41 enum drm_map_type type; /**< Type of memory to map */
42 enum drm_map_flags flags; /**< Flags */
43 u32 handle; /**< User-space: "Handle" to pass to mmap() */
44 int mtrr; /**< MTRR slot used */
47 struct drm32_xgi_bootstrap {
48 struct drm_map32 gart;
52 extern int xgi_bootstrap(struct drm_device *, void *, struct drm_file *);
54 static int compat_xgi_bootstrap(struct file *filp, unsigned int cmd,
57 struct drm32_xgi_bootstrap __user *const argp = (void __user *)arg;
58 struct drm32_xgi_bootstrap bs32;
59 struct xgi_bootstrap __user *bs;
64 if (copy_from_user(&bs32, argp, sizeof(bs32))) {
68 bs = compat_alloc_user_space(sizeof(*bs));
69 if (!access_ok(VERIFY_WRITE, bs, sizeof(*bs))) {
73 if (__put_user(bs32.gart.offset, &bs->gart.offset)
74 || __put_user(bs32.gart.size, &bs->gart.size)
75 || __put_user(bs32.gart.type, &bs->gart.type)
76 || __put_user(bs32.gart.flags, &bs->gart.flags)) {
80 err = drm_ioctl(filp->f_dentry->d_inode, filp, XGI_IOCTL_BOOTSTRAP,
86 if (__get_user(bs32.gart.offset, &bs->gart.offset)
87 || __get_user(bs32.gart.mtrr, &bs->gart.mtrr)
88 || __get_user(handle, &bs->gart.handle)) {
92 bs32.gart.handle = (unsigned long)handle;
93 if (bs32.gart.handle != (unsigned long)handle && printk_ratelimit()) {
94 printk(KERN_ERR "%s truncated handle %p for type %d "
96 __func__, handle, bs32.gart.type, bs32.gart.offset);
99 if (copy_to_user(argp, &bs32, sizeof(bs32))) {
107 drm_ioctl_compat_t *xgi_compat_ioctls[] = {
108 [DRM_XGI_BOOTSTRAP] = compat_xgi_bootstrap,
112 * Called whenever a 32-bit process running under a 64-bit kernel
113 * performs an ioctl on /dev/dri/card<n>.
115 * \param filp file pointer.
116 * \param cmd command.
117 * \param arg user argument.
118 * \return zero on success or negative number on failure.
120 long xgi_compat_ioctl(struct file *filp, unsigned int cmd,
123 const unsigned int nr = DRM_IOCTL_NR(cmd);
124 drm_ioctl_compat_t *fn = NULL;
127 if (nr < DRM_COMMAND_BASE)
128 return drm_compat_ioctl(filp, cmd, arg);
130 if (nr < DRM_COMMAND_BASE + DRM_ARRAY_SIZE(xgi_compat_ioctls))
131 fn = xgi_compat_ioctls[nr - DRM_COMMAND_BASE];
135 ? (*fn)(filp, cmd, arg)
136 : drm_ioctl(filp->f_dentry->d_inode, filp, cmd, arg);