216 lines
6.8 KiB
C
216 lines
6.8 KiB
C
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/**
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* \file r128_ioc32.c
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*
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* 32-bit ioctl compatibility routines for the R128 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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* 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 <drm/drmP.h>
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#include <drm/r128_drm.h>
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#include "r128_drv.h"
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typedef struct drm_r128_init32 {
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int func;
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unsigned int sarea_priv_offset;
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int is_pci;
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int cce_mode;
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int cce_secure;
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int ring_size;
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int usec_timeout;
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unsigned int fb_bpp;
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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_bpp;
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unsigned int depth_offset, depth_pitch;
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unsigned int span_offset;
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unsigned int fb_offset;
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unsigned int mmio_offset;
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unsigned int ring_offset;
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unsigned int ring_rptr_offset;
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unsigned int buffers_offset;
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unsigned int agp_textures_offset;
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} drm_r128_init32_t;
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static int compat_r128_init(struct file *file, unsigned int cmd,
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unsigned long arg)
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{
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drm_r128_init32_t init32;
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drm_r128_init_t __user *init;
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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.is_pci, &init->is_pci)
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|| __put_user(init32.cce_mode, &init->cce_mode)
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|| __put_user(init32.cce_secure, &init->cce_secure)
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|| __put_user(init32.ring_size, &init->ring_size)
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|| __put_user(init32.usec_timeout, &init->usec_timeout)
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|| __put_user(init32.fb_bpp, &init->fb_bpp)
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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_bpp, &init->depth_bpp)
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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.span_offset, &init->span_offset)
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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.ring_offset, &init->ring_offset)
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|| __put_user(init32.ring_rptr_offset, &init->ring_rptr_offset)
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|| __put_user(init32.buffers_offset, &init->buffers_offset)
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|| __put_user(init32.agp_textures_offset,
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&init->agp_textures_offset))
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return -EFAULT;
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return drm_ioctl(file, DRM_IOCTL_R128_INIT, (unsigned long)init);
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}
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typedef struct drm_r128_depth32 {
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int func;
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int n;
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u32 x;
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u32 y;
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u32 buffer;
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u32 mask;
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} drm_r128_depth32_t;
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static int compat_r128_depth(struct file *file, unsigned int cmd,
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unsigned long arg)
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{
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drm_r128_depth32_t depth32;
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drm_r128_depth_t __user *depth;
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if (copy_from_user(&depth32, (void __user *)arg, sizeof(depth32)))
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return -EFAULT;
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depth = compat_alloc_user_space(sizeof(*depth));
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if (!access_ok(VERIFY_WRITE, depth, sizeof(*depth))
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|| __put_user(depth32.func, &depth->func)
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|| __put_user(depth32.n, &depth->n)
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|| __put_user((int __user *)(unsigned long)depth32.x, &depth->x)
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|| __put_user((int __user *)(unsigned long)depth32.y, &depth->y)
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|| __put_user((unsigned int __user *)(unsigned long)depth32.buffer,
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&depth->buffer)
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|| __put_user((unsigned char __user *)(unsigned long)depth32.mask,
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&depth->mask))
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return -EFAULT;
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return drm_ioctl(file, DRM_IOCTL_R128_DEPTH, (unsigned long)depth);
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}
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typedef struct drm_r128_stipple32 {
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u32 mask;
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} drm_r128_stipple32_t;
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static int compat_r128_stipple(struct file *file, unsigned int cmd,
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unsigned long arg)
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{
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drm_r128_stipple32_t stipple32;
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drm_r128_stipple_t __user *stipple;
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if (copy_from_user(&stipple32, (void __user *)arg, sizeof(stipple32)))
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return -EFAULT;
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stipple = compat_alloc_user_space(sizeof(*stipple));
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if (!access_ok(VERIFY_WRITE, stipple, sizeof(*stipple))
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|| __put_user((unsigned int __user *)(unsigned long)stipple32.mask,
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&stipple->mask))
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return -EFAULT;
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return drm_ioctl(file, DRM_IOCTL_R128_STIPPLE, (unsigned long)stipple);
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}
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typedef struct drm_r128_getparam32 {
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int param;
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u32 value;
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} drm_r128_getparam32_t;
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static int compat_r128_getparam(struct file *file, unsigned int cmd,
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unsigned long arg)
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{
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drm_r128_getparam32_t getparam32;
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drm_r128_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, DRM_IOCTL_R128_GETPARAM, (unsigned long)getparam);
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}
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drm_ioctl_compat_t *r128_compat_ioctls[] = {
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[DRM_R128_INIT] = compat_r128_init,
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[DRM_R128_DEPTH] = compat_r128_depth,
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[DRM_R128_STIPPLE] = compat_r128_stipple,
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[DRM_R128_GETPARAM] = compat_r128_getparam,
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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 r128_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 + ARRAY_SIZE(r128_compat_ioctls))
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fn = r128_compat_ioctls[nr - DRM_COMMAND_BASE];
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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, cmd, arg);
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return ret;
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}
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