232 lines
7.5 KiB
C
232 lines
7.5 KiB
C
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/**
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* \file mga_ioc32.c
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*
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* 32-bit ioctl compatibility routines for the MGA DRM.
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*
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* \author Dave Airlie <airlied@linux.ie> with code from patches by Egbert Eich
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*
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*
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* Copyright (C) Paul Mackerras 2005
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* Copyright (C) Egbert Eich 2003,2004
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* Copyright (C) Dave Airlie 2005
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include <linux/compat.h>
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#include "drmP.h"
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#include "drm.h"
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#include "mga_drm.h"
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typedef struct drm32_mga_init {
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int func;
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u32 sarea_priv_offset;
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int chipset;
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int sgram;
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unsigned int maccess;
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unsigned int fb_cpp;
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unsigned int front_offset, front_pitch;
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unsigned int back_offset, back_pitch;
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unsigned int depth_cpp;
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unsigned int depth_offset, depth_pitch;
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unsigned int texture_offset[MGA_NR_TEX_HEAPS];
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unsigned int texture_size[MGA_NR_TEX_HEAPS];
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u32 fb_offset;
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u32 mmio_offset;
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u32 status_offset;
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u32 warp_offset;
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u32 primary_offset;
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u32 buffers_offset;
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} drm_mga_init32_t;
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static int compat_mga_init(struct file *file, unsigned int cmd,
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unsigned long arg)
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{
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drm_mga_init32_t init32;
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drm_mga_init_t __user *init;
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int err = 0, i;
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if (copy_from_user(&init32, (void __user *)arg, sizeof(init32)))
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return -EFAULT;
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init = compat_alloc_user_space(sizeof(*init));
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if (!access_ok(VERIFY_WRITE, init, sizeof(*init))
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|| __put_user(init32.func, &init->func)
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|| __put_user(init32.sarea_priv_offset, &init->sarea_priv_offset)
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|| __put_user(init32.chipset, &init->chipset)
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|| __put_user(init32.sgram, &init->sgram)
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|| __put_user(init32.maccess, &init->maccess)
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|| __put_user(init32.fb_cpp, &init->fb_cpp)
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|| __put_user(init32.front_offset, &init->front_offset)
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|| __put_user(init32.front_pitch, &init->front_pitch)
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|| __put_user(init32.back_offset, &init->back_offset)
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|| __put_user(init32.back_pitch, &init->back_pitch)
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|| __put_user(init32.depth_cpp, &init->depth_cpp)
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|| __put_user(init32.depth_offset, &init->depth_offset)
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|| __put_user(init32.depth_pitch, &init->depth_pitch)
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|| __put_user(init32.fb_offset, &init->fb_offset)
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|| __put_user(init32.mmio_offset, &init->mmio_offset)
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|| __put_user(init32.status_offset, &init->status_offset)
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|| __put_user(init32.warp_offset, &init->warp_offset)
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|| __put_user(init32.primary_offset, &init->primary_offset)
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|| __put_user(init32.buffers_offset, &init->buffers_offset))
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return -EFAULT;
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for (i = 0; i < MGA_NR_TEX_HEAPS; i++) {
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err |=
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__put_user(init32.texture_offset[i],
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&init->texture_offset[i]);
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err |=
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__put_user(init32.texture_size[i], &init->texture_size[i]);
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}
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if (err)
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return -EFAULT;
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return drm_ioctl(file->f_path.dentry->d_inode, file,
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DRM_IOCTL_MGA_INIT, (unsigned long)init);
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}
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typedef struct drm_mga_getparam32 {
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int param;
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u32 value;
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} drm_mga_getparam32_t;
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static int compat_mga_getparam(struct file *file, unsigned int cmd,
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unsigned long arg)
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{
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drm_mga_getparam32_t getparam32;
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drm_mga_getparam_t __user *getparam;
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if (copy_from_user(&getparam32, (void __user *)arg, sizeof(getparam32)))
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return -EFAULT;
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getparam = compat_alloc_user_space(sizeof(*getparam));
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if (!access_ok(VERIFY_WRITE, getparam, sizeof(*getparam))
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|| __put_user(getparam32.param, &getparam->param)
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|| __put_user((void __user *)(unsigned long)getparam32.value,
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&getparam->value))
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return -EFAULT;
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return drm_ioctl(file->f_path.dentry->d_inode, file,
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DRM_IOCTL_MGA_GETPARAM, (unsigned long)getparam);
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}
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typedef struct drm_mga_drm_bootstrap32 {
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u32 texture_handle;
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u32 texture_size;
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u32 primary_size;
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u32 secondary_bin_count;
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u32 secondary_bin_size;
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u32 agp_mode;
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u8 agp_size;
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} drm_mga_dma_bootstrap32_t;
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static int compat_mga_dma_bootstrap(struct file *file, unsigned int cmd,
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unsigned long arg)
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{
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drm_mga_dma_bootstrap32_t dma_bootstrap32;
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drm_mga_dma_bootstrap_t __user *dma_bootstrap;
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int err;
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if (copy_from_user(&dma_bootstrap32, (void __user *)arg,
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sizeof(dma_bootstrap32)))
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return -EFAULT;
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dma_bootstrap = compat_alloc_user_space(sizeof(*dma_bootstrap));
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if (!access_ok(VERIFY_WRITE, dma_bootstrap, sizeof(*dma_bootstrap))
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|| __put_user(dma_bootstrap32.texture_handle,
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&dma_bootstrap->texture_handle)
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|| __put_user(dma_bootstrap32.texture_size,
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&dma_bootstrap->texture_size)
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|| __put_user(dma_bootstrap32.primary_size,
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&dma_bootstrap->primary_size)
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|| __put_user(dma_bootstrap32.secondary_bin_count,
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&dma_bootstrap->secondary_bin_count)
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|| __put_user(dma_bootstrap32.secondary_bin_size,
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&dma_bootstrap->secondary_bin_size)
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|| __put_user(dma_bootstrap32.agp_mode, &dma_bootstrap->agp_mode)
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|| __put_user(dma_bootstrap32.agp_size, &dma_bootstrap->agp_size))
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return -EFAULT;
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err = drm_ioctl(file->f_path.dentry->d_inode, file,
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DRM_IOCTL_MGA_DMA_BOOTSTRAP,
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(unsigned long)dma_bootstrap);
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if (err)
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return err;
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if (__get_user(dma_bootstrap32.texture_handle,
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&dma_bootstrap->texture_handle)
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|| __get_user(dma_bootstrap32.texture_size,
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&dma_bootstrap->texture_size)
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|| __get_user(dma_bootstrap32.primary_size,
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&dma_bootstrap->primary_size)
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|| __get_user(dma_bootstrap32.secondary_bin_count,
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&dma_bootstrap->secondary_bin_count)
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|| __get_user(dma_bootstrap32.secondary_bin_size,
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&dma_bootstrap->secondary_bin_size)
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|| __get_user(dma_bootstrap32.agp_mode, &dma_bootstrap->agp_mode)
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|| __get_user(dma_bootstrap32.agp_size, &dma_bootstrap->agp_size))
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return -EFAULT;
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if (copy_to_user((void __user *)arg, &dma_bootstrap32,
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sizeof(dma_bootstrap32)))
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return -EFAULT;
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return 0;
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}
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drm_ioctl_compat_t *mga_compat_ioctls[] = {
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[DRM_MGA_INIT] = compat_mga_init,
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[DRM_MGA_GETPARAM] = compat_mga_getparam,
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[DRM_MGA_DMA_BOOTSTRAP] = compat_mga_dma_bootstrap,
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};
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/**
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* Called whenever a 32-bit process running under a 64-bit kernel
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* performs an ioctl on /dev/dri/card<n>.
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*
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* \param filp file pointer.
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* \param cmd command.
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* \param arg user argument.
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* \return zero on success or negative number on failure.
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*/
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long mga_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
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{
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unsigned int nr = DRM_IOCTL_NR(cmd);
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drm_ioctl_compat_t *fn = NULL;
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int ret;
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if (nr < DRM_COMMAND_BASE)
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return drm_compat_ioctl(filp, cmd, arg);
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if (nr < DRM_COMMAND_BASE + DRM_ARRAY_SIZE(mga_compat_ioctls))
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fn = mga_compat_ioctls[nr - DRM_COMMAND_BASE];
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lock_kernel(); /* XXX for now */
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if (fn != NULL)
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ret = (*fn) (filp, cmd, arg);
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else
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ret = drm_ioctl(filp->f_path.dentry->d_inode, filp, cmd, arg);
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unlock_kernel();
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return ret;
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}
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