1 /* $NetBSD: mga_ioc32.c,v 1.3 2021/12/18 23:45:32 riastradh Exp $ */ 2 3 /** 4 * \file mga_ioc32.c 5 * 6 * 32-bit ioctl compatibility routines for the MGA DRM. 7 * 8 * \author Dave Airlie <airlied (at) linux.ie> with code from patches by Egbert Eich 9 * 10 * 11 * Copyright (C) Paul Mackerras 2005 12 * Copyright (C) Egbert Eich 2003,2004 13 * Copyright (C) Dave Airlie 2005 14 * All Rights Reserved. 15 * 16 * Permission is hereby granted, free of charge, to any person obtaining a 17 * copy of this software and associated documentation files (the "Software"), 18 * to deal in the Software without restriction, including without limitation 19 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 20 * and/or sell copies of the Software, and to permit persons to whom the 21 * Software is furnished to do so, subject to the following conditions: 22 * 23 * The above copyright notice and this permission notice (including the next 24 * paragraph) shall be included in all copies or substantial portions of the 25 * Software. 26 * 27 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 28 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 29 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 30 * THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 31 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 32 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 33 * IN THE SOFTWARE. 34 */ 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: mga_ioc32.c,v 1.3 2021/12/18 23:45:32 riastradh Exp $"); 38 39 #include <linux/compat.h> 40 41 #include "mga_drv.h" 42 43 typedef struct drm32_mga_init { 44 int func; 45 u32 sarea_priv_offset; 46 int chipset; 47 int sgram; 48 unsigned int maccess; 49 unsigned int fb_cpp; 50 unsigned int front_offset, front_pitch; 51 unsigned int back_offset, back_pitch; 52 unsigned int depth_cpp; 53 unsigned int depth_offset, depth_pitch; 54 unsigned int texture_offset[MGA_NR_TEX_HEAPS]; 55 unsigned int texture_size[MGA_NR_TEX_HEAPS]; 56 u32 fb_offset; 57 u32 mmio_offset; 58 u32 status_offset; 59 u32 warp_offset; 60 u32 primary_offset; 61 u32 buffers_offset; 62 } drm_mga_init32_t; 63 64 static int compat_mga_init(struct file *file, unsigned int cmd, 65 unsigned long arg) 66 { 67 drm_mga_init32_t init32; 68 drm_mga_init_t init; 69 70 if (copy_from_user(&init32, (void __user *)arg, sizeof(init32))) 71 return -EFAULT; 72 73 init.func = init32.func; 74 init.sarea_priv_offset = init32.sarea_priv_offset; 75 memcpy(&init.chipset, &init32.chipset, 76 offsetof(drm_mga_init_t, fb_offset) - 77 offsetof(drm_mga_init_t, chipset)); 78 init.fb_offset = init32.fb_offset; 79 init.mmio_offset = init32.mmio_offset; 80 init.status_offset = init32.status_offset; 81 init.warp_offset = init32.warp_offset; 82 init.primary_offset = init32.primary_offset; 83 init.buffers_offset = init32.buffers_offset; 84 85 return drm_ioctl_kernel(file, mga_dma_init, &init, 86 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 87 } 88 89 typedef struct drm_mga_getparam32 { 90 int param; 91 u32 value; 92 } drm_mga_getparam32_t; 93 94 static int compat_mga_getparam(struct file *file, unsigned int cmd, 95 unsigned long arg) 96 { 97 drm_mga_getparam32_t getparam32; 98 drm_mga_getparam_t getparam; 99 100 if (copy_from_user(&getparam32, (void __user *)arg, sizeof(getparam32))) 101 return -EFAULT; 102 103 getparam.param = getparam32.param; 104 getparam.value = compat_ptr(getparam32.value); 105 return drm_ioctl_kernel(file, mga_getparam, &getparam, DRM_AUTH); 106 } 107 108 typedef struct drm_mga_drm_bootstrap32 { 109 u32 texture_handle; 110 u32 texture_size; 111 u32 primary_size; 112 u32 secondary_bin_count; 113 u32 secondary_bin_size; 114 u32 agp_mode; 115 u8 agp_size; 116 } drm_mga_dma_bootstrap32_t; 117 118 static int compat_mga_dma_bootstrap(struct file *file, unsigned int cmd, 119 unsigned long arg) 120 { 121 drm_mga_dma_bootstrap32_t dma_bootstrap32; 122 drm_mga_dma_bootstrap_t dma_bootstrap; 123 int err; 124 125 if (copy_from_user(&dma_bootstrap32, (void __user *)arg, 126 sizeof(dma_bootstrap32))) 127 return -EFAULT; 128 129 dma_bootstrap.texture_handle = dma_bootstrap32.texture_handle; 130 dma_bootstrap.texture_size = dma_bootstrap32.texture_size; 131 dma_bootstrap.primary_size = dma_bootstrap32.primary_size; 132 dma_bootstrap.secondary_bin_count = dma_bootstrap32.secondary_bin_count; 133 dma_bootstrap.secondary_bin_size = dma_bootstrap32.secondary_bin_size; 134 dma_bootstrap.agp_mode = dma_bootstrap32.agp_mode; 135 dma_bootstrap.agp_size = dma_bootstrap32.agp_size; 136 137 err = drm_ioctl_kernel(file, mga_dma_bootstrap, &dma_bootstrap, 138 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 139 if (err) 140 return err; 141 142 dma_bootstrap32.texture_handle = dma_bootstrap.texture_handle; 143 dma_bootstrap32.texture_size = dma_bootstrap.texture_size; 144 dma_bootstrap32.primary_size = dma_bootstrap.primary_size; 145 dma_bootstrap32.secondary_bin_count = dma_bootstrap.secondary_bin_count; 146 dma_bootstrap32.secondary_bin_size = dma_bootstrap.secondary_bin_size; 147 dma_bootstrap32.agp_mode = dma_bootstrap.agp_mode; 148 dma_bootstrap32.agp_size = dma_bootstrap.agp_size; 149 if (copy_to_user((void __user *)arg, &dma_bootstrap32, 150 sizeof(dma_bootstrap32))) 151 return -EFAULT; 152 153 return 0; 154 } 155 156 static struct { 157 drm_ioctl_compat_t *fn; 158 char *name; 159 } mga_compat_ioctls[] = { 160 #define DRM_IOCTL32_DEF(n, f)[DRM_##n] = {.fn = f, .name = #n} 161 DRM_IOCTL32_DEF(MGA_INIT, compat_mga_init), 162 DRM_IOCTL32_DEF(MGA_GETPARAM, compat_mga_getparam), 163 DRM_IOCTL32_DEF(MGA_DMA_BOOTSTRAP, compat_mga_dma_bootstrap), 164 }; 165 166 /** 167 * Called whenever a 32-bit process running under a 64-bit kernel 168 * performs an ioctl on /dev/dri/card<n>. 169 * 170 * \param filp file pointer. 171 * \param cmd command. 172 * \param arg user argument. 173 * \return zero on success or negative number on failure. 174 */ 175 long mga_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 176 { 177 unsigned int nr = DRM_IOCTL_NR(cmd); 178 struct drm_file *file_priv = filp->private_data; 179 drm_ioctl_compat_t *fn = NULL; 180 int ret; 181 182 if (nr < DRM_COMMAND_BASE) 183 return drm_compat_ioctl(filp, cmd, arg); 184 185 if (nr >= DRM_COMMAND_BASE + ARRAY_SIZE(mga_compat_ioctls)) 186 return drm_ioctl(filp, cmd, arg); 187 188 fn = mga_compat_ioctls[nr - DRM_COMMAND_BASE].fn; 189 if (!fn) 190 return drm_ioctl(filp, cmd, arg); 191 192 DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n", 193 task_pid_nr(current), 194 (long)old_encode_dev(file_priv->minor->kdev->devt), 195 file_priv->authenticated, 196 mga_compat_ioctls[nr - DRM_COMMAND_BASE].name); 197 ret = (*fn) (filp, cmd, arg); 198 if (ret) 199 DRM_DEBUG("ret = %d\n", ret); 200 return ret; 201 } 202
Indexes created Mon Sep 29 21:09:56 GMT 2025