Dave Airlie | 8ca7c1d | 2005-07-07 21:51:26 +1000 | [diff] [blame^] | 1 | /** |
| 2 | * \file mga_ioc32.c |
| 3 | * |
| 4 | * 32-bit ioctl compatibility routines for the MGA DRM. |
| 5 | * |
| 6 | * \author Dave Airlie <airlied@linux.ie> with code from patches by Egbert Eich |
| 7 | * |
| 8 | * |
| 9 | * Copyright (C) Paul Mackerras 2005 |
| 10 | * Copyright (C) Egbert Eich 2003,2004 |
| 11 | * Copyright (C) Dave Airlie 2005 |
| 12 | * All Rights Reserved. |
| 13 | * |
| 14 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 15 | * copy of this software and associated documentation files (the "Software"), |
| 16 | * to deal in the Software without restriction, including without limitation |
| 17 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 18 | * and/or sell copies of the Software, and to permit persons to whom the |
| 19 | * Software is furnished to do so, subject to the following conditions: |
| 20 | * |
| 21 | * The above copyright notice and this permission notice (including the next |
| 22 | * paragraph) shall be included in all copies or substantial portions of the |
| 23 | * Software. |
| 24 | * |
| 25 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 26 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 27 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 28 | * THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
| 29 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 30 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
| 31 | * IN THE SOFTWARE. |
| 32 | */ |
| 33 | #include <linux/compat.h> |
| 34 | #include <linux/ioctl32.h> |
| 35 | |
| 36 | #include "drmP.h" |
| 37 | #include "drm.h" |
| 38 | #include "mga_drm.h" |
| 39 | |
| 40 | typedef struct drm32_mga_init { |
| 41 | int func; |
| 42 | u32 sarea_priv_offset; |
| 43 | int chipset; |
| 44 | int sgram; |
| 45 | unsigned int maccess; |
| 46 | unsigned int fb_cpp; |
| 47 | unsigned int front_offset, front_pitch; |
| 48 | unsigned int back_offset, back_pitch; |
| 49 | unsigned int depth_cpp; |
| 50 | unsigned int depth_offset, depth_pitch; |
| 51 | unsigned int texture_offset[MGA_NR_TEX_HEAPS]; |
| 52 | unsigned int texture_size[MGA_NR_TEX_HEAPS]; |
| 53 | u32 fb_offset; |
| 54 | u32 mmio_offset; |
| 55 | u32 status_offset; |
| 56 | u32 warp_offset; |
| 57 | u32 primary_offset; |
| 58 | u32 buffers_offset; |
| 59 | } drm_mga_init32_t; |
| 60 | |
| 61 | static int compat_mga_init(struct file *file, unsigned int cmd, |
| 62 | unsigned long arg) |
| 63 | { |
| 64 | drm_mga_init32_t init32; |
| 65 | drm_mga_init_t __user *init; |
| 66 | int err = 0, i; |
| 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.chipset, &init->chipset) |
| 76 | || __put_user(init32.sgram, &init->sgram) |
| 77 | || __put_user(init32.maccess, &init->maccess) |
| 78 | || __put_user(init32.fb_cpp, &init->fb_cpp) |
| 79 | || __put_user(init32.front_offset, &init->front_offset) |
| 80 | || __put_user(init32.front_pitch, &init->front_pitch) |
| 81 | || __put_user(init32.back_offset, &init->back_offset) |
| 82 | || __put_user(init32.back_pitch, &init->back_pitch) |
| 83 | || __put_user(init32.depth_cpp, &init->depth_cpp) |
| 84 | || __put_user(init32.depth_offset, &init->depth_offset) |
| 85 | || __put_user(init32.depth_pitch, &init->depth_pitch) |
| 86 | || __put_user(init32.fb_offset, &init->fb_offset) |
| 87 | || __put_user(init32.mmio_offset, &init->mmio_offset) |
| 88 | || __put_user(init32.status_offset, &init->status_offset) |
| 89 | || __put_user(init32.warp_offset, &init->warp_offset) |
| 90 | || __put_user(init32.primary_offset, &init->primary_offset) |
| 91 | || __put_user(init32.buffers_offset, &init->buffers_offset)) |
| 92 | return -EFAULT; |
| 93 | |
| 94 | for (i=0; i<MGA_NR_TEX_HEAPS; i++) |
| 95 | { |
| 96 | err |= __put_user(init32.texture_offset[i], &init->texture_offset[i]); |
| 97 | err |= __put_user(init32.texture_size[i], &init->texture_size[i]); |
| 98 | } |
| 99 | if (err) |
| 100 | return -EFAULT; |
| 101 | |
| 102 | return drm_ioctl(file->f_dentry->d_inode, file, |
| 103 | DRM_IOCTL_MGA_INIT, (unsigned long) init); |
| 104 | } |
| 105 | |
| 106 | |
| 107 | typedef struct drm_mga_getparam32 { |
| 108 | int param; |
| 109 | u32 value; |
| 110 | } drm_mga_getparam32_t; |
| 111 | |
| 112 | |
| 113 | static int compat_mga_getparam(struct file *file, unsigned int cmd, |
| 114 | unsigned long arg) |
| 115 | { |
| 116 | drm_mga_getparam32_t getparam32; |
| 117 | drm_mga_getparam_t __user *getparam; |
| 118 | |
| 119 | if (copy_from_user(&getparam32, (void __user *)arg, sizeof(getparam32))) |
| 120 | return -EFAULT; |
| 121 | |
| 122 | getparam = compat_alloc_user_space(sizeof(*getparam)); |
| 123 | if (!access_ok(VERIFY_WRITE, getparam, sizeof(*getparam)) |
| 124 | || __put_user(getparam32.param, &getparam->param) |
| 125 | || __put_user((void __user *)(unsigned long)getparam32.value, &getparam->value)) |
| 126 | return -EFAULT; |
| 127 | |
| 128 | return drm_ioctl(file->f_dentry->d_inode, file, |
| 129 | DRM_IOCTL_MGA_GETPARAM, (unsigned long)getparam); |
| 130 | } |
| 131 | |
| 132 | drm_ioctl_compat_t *mga_compat_ioctls[] = { |
| 133 | [DRM_MGA_INIT] = compat_mga_init, |
| 134 | [DRM_MGA_GETPARAM] = compat_mga_getparam, |
| 135 | }; |
| 136 | |
| 137 | /** |
| 138 | * Called whenever a 32-bit process running under a 64-bit kernel |
| 139 | * performs an ioctl on /dev/dri/card<n>. |
| 140 | * |
| 141 | * \param filp file pointer. |
| 142 | * \param cmd command. |
| 143 | * \param arg user argument. |
| 144 | * \return zero on success or negative number on failure. |
| 145 | */ |
| 146 | long mga_compat_ioctl(struct file *filp, unsigned int cmd, |
| 147 | unsigned long arg) |
| 148 | { |
| 149 | unsigned int nr = DRM_IOCTL_NR(cmd); |
| 150 | drm_ioctl_compat_t *fn = NULL; |
| 151 | int ret; |
| 152 | |
| 153 | if (nr < DRM_COMMAND_BASE) |
| 154 | return drm_compat_ioctl(filp, cmd, arg); |
| 155 | |
| 156 | if (nr < DRM_COMMAND_BASE + DRM_ARRAY_SIZE(mga_compat_ioctls)) |
| 157 | fn = mga_compat_ioctls[nr - DRM_COMMAND_BASE]; |
| 158 | |
| 159 | lock_kernel(); /* XXX for now */ |
| 160 | if (fn != NULL) |
| 161 | ret = (*fn)(filp, cmd, arg); |
| 162 | else |
| 163 | ret = drm_ioctl(filp->f_dentry->d_inode, filp, cmd, arg); |
| 164 | unlock_kernel(); |
| 165 | |
| 166 | return ret; |
| 167 | } |