1/** 2 * \file r128_ioc32.c 3 * 4 * 32-bit ioctl compatibility routines for the R128 DRM. 5 * 6 * \author Dave Airlie <airlied@linux.ie> with code from patches by Egbert Eich 7 * 8 * Copyright (C) Paul Mackerras 2005 9 * Copyright (C) Egbert Eich 2003,2004 10 * Copyright (C) Dave Airlie 2005 11 * All Rights Reserved. 12 * 13 * Permission is hereby granted, free of charge, to any person obtaining a 14 * copy of this software and associated documentation files (the "Software"), 15 * to deal in the Software without restriction, including without limitation 16 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 17 * and/or sell copies of the Software, and to permit persons to whom the 18 * Software is furnished to do so, subject to the following conditions: 19 * 20 * The above copyright notice and this permission notice (including the next 21 * paragraph) shall be included in all copies or substantial portions of the 22 * Software. 23 * 24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 25 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 26 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 27 * THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 28 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 29 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 30 * IN THE SOFTWARE. 31 */ 32#include <linux/compat.h> 33 34#include "drmP.h" 35#include "drm.h" 36#include "r128_drm.h" 37 38typedef struct drm_r128_init32 { 39 int func; 40 unsigned int sarea_priv_offset; 41 int is_pci; 42 int cce_mode; 43 int cce_secure; 44 int ring_size; 45 int usec_timeout; 46 47 unsigned int fb_bpp; 48 unsigned int front_offset, front_pitch; 49 unsigned int back_offset, back_pitch; 50 unsigned int depth_bpp; 51 unsigned int depth_offset, depth_pitch; 52 unsigned int span_offset; 53 54 unsigned int fb_offset; 55 unsigned int mmio_offset; 56 unsigned int ring_offset; 57 unsigned int ring_rptr_offset; 58 unsigned int buffers_offset; 59 unsigned int agp_textures_offset; 60} drm_r128_init32_t; 61 62static int compat_r128_init(struct file *file, unsigned int cmd, 63 unsigned long arg) 64{ 65 drm_r128_init32_t init32; 66 drm_r128_init_t __user *init; 67 68 if (copy_from_user(&init32, (void __user *)arg, sizeof(init32))) 69 return -EFAULT; 70 71 init = compat_alloc_user_space(sizeof(*init)); 72 if (!access_ok(VERIFY_WRITE, init, sizeof(*init)) 73 || __put_user(init32.func, &init->func) 74 || __put_user(init32.sarea_priv_offset, &init->sarea_priv_offset) 75 || __put_user(init32.is_pci, &init->is_pci) 76 || __put_user(init32.cce_mode, &init->cce_mode) 77 || __put_user(init32.cce_secure, &init->cce_secure) 78 || __put_user(init32.ring_size, &init->ring_size) 79 || __put_user(init32.usec_timeout, &init->usec_timeout) 80 || __put_user(init32.fb_bpp, &init->fb_bpp) 81 || __put_user(init32.front_offset, &init->front_offset) 82 || __put_user(init32.front_pitch, &init->front_pitch) 83 || __put_user(init32.back_offset, &init->back_offset) 84 || __put_user(init32.back_pitch, &init->back_pitch) 85 || __put_user(init32.depth_bpp, &init->depth_bpp) 86 || __put_user(init32.depth_offset, &init->depth_offset) 87 || __put_user(init32.depth_pitch, &init->depth_pitch) 88 || __put_user(init32.span_offset, &init->span_offset) 89 || __put_user(init32.fb_offset, &init->fb_offset) 90 || __put_user(init32.mmio_offset, &init->mmio_offset) 91 || __put_user(init32.ring_offset, &init->ring_offset) 92 || __put_user(init32.ring_rptr_offset, &init->ring_rptr_offset) 93 || __put_user(init32.buffers_offset, &init->buffers_offset) 94 || __put_user(init32.agp_textures_offset, 95 &init->agp_textures_offset)) 96 return -EFAULT; 97 98 return drm_ioctl(file, DRM_IOCTL_R128_INIT, (unsigned long)init); 99} 100 101typedef struct drm_r128_depth32 { 102 int func; 103 int n; 104 u32 x; 105 u32 y; 106 u32 buffer; 107 u32 mask; 108} drm_r128_depth32_t; 109 110static int compat_r128_depth(struct file *file, unsigned int cmd, 111 unsigned long arg) 112{ 113 drm_r128_depth32_t depth32; 114 drm_r128_depth_t __user *depth; 115 116 if (copy_from_user(&depth32, (void __user *)arg, sizeof(depth32))) 117 return -EFAULT; 118 119 depth = compat_alloc_user_space(sizeof(*depth)); 120 if (!access_ok(VERIFY_WRITE, depth, sizeof(*depth)) 121 || __put_user(depth32.func, &depth->func) 122 || __put_user(depth32.n, &depth->n) 123 || __put_user((int __user *)(unsigned long)depth32.x, &depth->x) 124 || __put_user((int __user *)(unsigned long)depth32.y, &depth->y) 125 || __put_user((unsigned int __user *)(unsigned long)depth32.buffer, 126 &depth->buffer) 127 || __put_user((unsigned char __user *)(unsigned long)depth32.mask, 128 &depth->mask)) 129 return -EFAULT; 130 131 return drm_ioctl(file, DRM_IOCTL_R128_DEPTH, (unsigned long)depth); 132 133} 134 135typedef struct drm_r128_stipple32 { 136 u32 mask; 137} drm_r128_stipple32_t; 138 139static int compat_r128_stipple(struct file *file, unsigned int cmd, 140 unsigned long arg) 141{ 142 drm_r128_stipple32_t stipple32; 143 drm_r128_stipple_t __user *stipple; 144 145 if (copy_from_user(&stipple32, (void __user *)arg, sizeof(stipple32))) 146 return -EFAULT; 147 148 stipple = compat_alloc_user_space(sizeof(*stipple)); 149 if (!access_ok(VERIFY_WRITE, stipple, sizeof(*stipple)) 150 || __put_user((unsigned int __user *)(unsigned long)stipple32.mask, 151 &stipple->mask)) 152 return -EFAULT; 153 154 return drm_ioctl(file, DRM_IOCTL_R128_STIPPLE, (unsigned long)stipple); 155} 156 157typedef struct drm_r128_getparam32 { 158 int param; 159 u32 value; 160} drm_r128_getparam32_t; 161 162static int compat_r128_getparam(struct file *file, unsigned int cmd, 163 unsigned long arg) 164{ 165 drm_r128_getparam32_t getparam32; 166 drm_r128_getparam_t __user *getparam; 167 168 if (copy_from_user(&getparam32, (void __user *)arg, sizeof(getparam32))) 169 return -EFAULT; 170 171 getparam = compat_alloc_user_space(sizeof(*getparam)); 172 if (!access_ok(VERIFY_WRITE, getparam, sizeof(*getparam)) 173 || __put_user(getparam32.param, &getparam->param) 174 || __put_user((void __user *)(unsigned long)getparam32.value, 175 &getparam->value)) 176 return -EFAULT; 177 178 return drm_ioctl(file, DRM_IOCTL_R128_GETPARAM, (unsigned long)getparam); 179} 180 181drm_ioctl_compat_t *r128_compat_ioctls[] = { 182 [DRM_R128_INIT] = compat_r128_init, 183 [DRM_R128_DEPTH] = compat_r128_depth, 184 [DRM_R128_STIPPLE] = compat_r128_stipple, 185 [DRM_R128_GETPARAM] = compat_r128_getparam, 186}; 187 188/** 189 * Called whenever a 32-bit process running under a 64-bit kernel 190 * performs an ioctl on /dev/dri/card<n>. 191 * 192 * \param filp file pointer. 193 * \param cmd command. 194 * \param arg user argument. 195 * \return zero on success or negative number on failure. 196 */ 197long r128_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 198{ 199 unsigned int nr = DRM_IOCTL_NR(cmd); 200 drm_ioctl_compat_t *fn = NULL; 201 int ret; 202 203 if (nr < DRM_COMMAND_BASE) 204 return drm_compat_ioctl(filp, cmd, arg); 205 206 if (nr < DRM_COMMAND_BASE + DRM_ARRAY_SIZE(r128_compat_ioctls)) 207 fn = r128_compat_ioctls[nr - DRM_COMMAND_BASE]; 208 209 if (fn != NULL) 210 ret = (*fn) (filp, cmd, arg); 211 else 212 ret = drm_ioctl(filp, cmd, arg); 213 214 return ret; 215} 216