4 * 32-bit ioctl compatibility routines for the i915 DRM.
6 * \author Alan Hourihane <alanh@fairlite.demon.co.uk>
9 * Copyright (C) Paul Mackerras 2005
10 * Copyright (C) Alan Hourihane 2005
11 * All Rights Reserved.
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14 * copy of this software and associated documentation files (the "Software"),
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18 * Software is furnished to do so, subject to the following conditions:
20 * The above copyright notice and this permission notice (including the next
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32 #include <linux/compat.h>
35 #include <drm/i915_drm.h>
38 typedef struct drm_i915_getparam32 {
41 } drm_i915_getparam32_t;
43 static int compat_i915_getparam(struct file *file, unsigned int cmd,
46 drm_i915_getparam32_t req32;
47 drm_i915_getparam_t __user *request;
49 if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
52 request = compat_alloc_user_space(sizeof(*request));
53 if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
54 || __put_user(req32.param, &request->param)
55 || __put_user((void __user *)(unsigned long)req32.value,
59 return drm_ioctl(file, DRM_IOCTL_I915_GETPARAM,
60 (unsigned long)request);
63 static drm_ioctl_compat_t *i915_compat_ioctls[] = {
64 [DRM_I915_GETPARAM] = compat_i915_getparam,
68 * Called whenever a 32-bit process running under a 64-bit kernel
69 * performs an ioctl on /dev/dri/card<n>.
71 * \param filp file pointer.
73 * \param arg user argument.
74 * \return zero on success or negative number on failure.
76 long i915_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
78 unsigned int nr = DRM_IOCTL_NR(cmd);
79 drm_ioctl_compat_t *fn = NULL;
82 if (nr < DRM_COMMAND_BASE)
83 return drm_compat_ioctl(filp, cmd, arg);
85 if (nr < DRM_COMMAND_BASE + ARRAY_SIZE(i915_compat_ioctls))
86 fn = i915_compat_ioctls[nr - DRM_COMMAND_BASE];
89 ret = (*fn) (filp, cmd, arg);
91 ret = drm_ioctl(filp, cmd, arg);