diff options
Diffstat (limited to 'drivers/char/drm/r128_ioc32.c')
| -rw-r--r-- | drivers/char/drm/r128_ioc32.c | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/drivers/char/drm/r128_ioc32.c b/drivers/char/drm/r128_ioc32.c new file mode 100644 index 000000000000..60598ef9475a --- /dev/null +++ b/drivers/char/drm/r128_ioc32.c @@ -0,0 +1,219 @@ +/** + * \file r128_ioc32.c + * + * 32-bit ioctl compatibility routines for the R128 DRM. + * + * \author Dave Airlie <airlied@linux.ie> with code from patches by Egbert Eich + * + * Copyright (C) Paul Mackerras 2005 + * Copyright (C) Egbert Eich 2003,2004 + * Copyright (C) Dave Airlie 2005 + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, + * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ +#include <linux/compat.h> +#include <linux/ioctl32.h> + +#include "drmP.h" +#include "drm.h" +#include "r128_drm.h" + +typedef struct drm_r128_init32 { + int func; + unsigned int sarea_priv_offset; + int is_pci; + int cce_mode; + int cce_secure; + int ring_size; + int usec_timeout; + + unsigned int fb_bpp; + unsigned int front_offset, front_pitch; + unsigned int back_offset, back_pitch; + unsigned int depth_bpp; + unsigned int depth_offset, depth_pitch; + unsigned int span_offset; + + unsigned int fb_offset; + unsigned int mmio_offset; + unsigned int ring_offset; + unsigned int ring_rptr_offset; + unsigned int buffers_offset; + unsigned int agp_textures_offset; +} drm_r128_init32_t; + +static int compat_r128_init(struct file *file, unsigned int cmd, + unsigned long arg) +{ + drm_r128_init32_t init32; + drm_r128_init_t __user *init; + + if (copy_from_user(&init32, (void __user *)arg, sizeof(init32))) + return -EFAULT; + + init = compat_alloc_user_space(sizeof(*init)); + if (!access_ok(VERIFY_WRITE, init, sizeof(*init)) + || __put_user(init32.func, &init->func) + || __put_user(init32.sarea_priv_offset, &init->sarea_priv_offset) + || __put_user(init32.is_pci, &init->is_pci) + || __put_user(init32.cce_mode, &init->cce_mode) + || __put_user(init32.cce_secure, &init->cce_secure) + || __put_user(init32.ring_size, &init->ring_size) + || __put_user(init32.usec_timeout, &init->usec_timeout) + || __put_user(init32.fb_bpp, &init->fb_bpp) + || __put_user(init32.front_offset, &init->front_offset) + || __put_user(init32.front_pitch, &init->front_pitch) + || __put_user(init32.back_offset, &init->back_offset) + || __put_user(init32.back_pitch, &init->back_pitch) + || __put_user(init32.depth_bpp, &init->depth_bpp) + || __put_user(init32.depth_offset, &init->depth_offset) + || __put_user(init32.depth_pitch, &init->depth_pitch) + || __put_user(init32.span_offset, &init->span_offset) + || __put_user(init32.fb_offset, &init->fb_offset) + || __put_user(init32.mmio_offset, &init->mmio_offset) + || __put_user(init32.ring_offset, &init->ring_offset) + || __put_user(init32.ring_rptr_offset, &init->ring_rptr_offset) + || __put_user(init32.buffers_offset, &init->buffers_offset) + || __put_user(init32.agp_textures_offset, &init->agp_textures_offset)) + return -EFAULT; + + return drm_ioctl(file->f_dentry->d_inode, file, + DRM_IOCTL_R128_INIT, (unsigned long)init); +} + + +typedef struct drm_r128_depth32 { + int func; + int n; + u32 x; + u32 y; + u32 buffer; + u32 mask; +} drm_r128_depth32_t; + +static int compat_r128_depth(struct file *file, unsigned int cmd, + unsigned long arg) +{ + drm_r128_depth32_t depth32; + drm_r128_depth_t __user *depth; + + if (copy_from_user(&depth32, (void __user *)arg, sizeof(depth32))) + return -EFAULT; + + depth = compat_alloc_user_space(sizeof(*depth)); + if (!access_ok(VERIFY_WRITE, depth, sizeof(*depth)) + || __put_user(depth32.func, &depth->func) + || __put_user(depth32.n, &depth->n) + || __put_user((int __user *)(unsigned long)depth32.x, &depth->x) + || __put_user((int __user *)(unsigned long)depth32.y, &depth->y) + || __put_user((unsigned int __user *)(unsigned long)depth32.buffer, &depth->buffer) + || __put_user((unsigned char __user *)(unsigned long)depth32.mask, &depth->mask)) + return -EFAULT; + + return drm_ioctl(file->f_dentry->d_inode, file, + DRM_IOCTL_R128_DEPTH, (unsigned long)depth); + +} + +typedef struct drm_r128_stipple32 { + u32 mask; +} drm_r128_stipple32_t; + +static int compat_r128_stipple(struct file *file, unsigned int cmd, + unsigned long arg) +{ + drm_r128_stipple32_t stipple32; + drm_r128_stipple_t __user *stipple; + + if (copy_from_user(&stipple32, (void __user *)arg, sizeof(stipple32))) + return -EFAULT; + + stipple = compat_alloc_user_space(sizeof(*stipple)); + if (!access_ok(VERIFY_WRITE, stipple, sizeof(*stipple)) + || __put_user((unsigned int __user *)(unsigned long)stipple32.mask, &stipple->mask)) + return -EFAULT; + + return drm_ioctl(file->f_dentry->d_inode, file, + DRM_IOCTL_R128_STIPPLE, (unsigned long)stipple); +} + +typedef struct drm_r128_getparam32 { + int param; + u32 value; +} drm_r128_getparam32_t; + +static int compat_r128_getparam(struct file *file, unsigned int cmd, + unsigned long arg) +{ + drm_r128_getparam32_t getparam32; + drm_r128_getparam_t __user *getparam; + + if (copy_from_user(&getparam32, (void __user *)arg, sizeof(getparam32))) + return -EFAULT; + + getparam = compat_alloc_user_space(sizeof(*getparam)); + if (!access_ok(VERIFY_WRITE, getparam, sizeof(*getparam)) + || __put_user(getparam32.param, &getparam->param) + || __put_user((void __user *)(unsigned long)getparam32.value, &getparam->value)) + return -EFAULT; + + return drm_ioctl(file->f_dentry->d_inode, file, + DRM_IOCTL_R128_GETPARAM, (unsigned long)getparam); +} + +drm_ioctl_compat_t *r128_compat_ioctls[] = { + [DRM_R128_INIT] = compat_r128_init, + [DRM_R128_DEPTH] = compat_r128_depth, + [DRM_R128_STIPPLE] = compat_r128_stipple, + [DRM_R128_GETPARAM] = compat_r128_getparam, +}; + +/** + * Called whenever a 32-bit process running under a 64-bit kernel + * performs an ioctl on /dev/dri/card<n>. + * + * \param filp file pointer. + * \param cmd command. + * \param arg user argument. + * \return zero on success or negative number on failure. + */ +long r128_compat_ioctl(struct file *filp, unsigned int cmd, + unsigned long arg) +{ + unsigned int nr = DRM_IOCTL_NR(cmd); + drm_ioctl_compat_t *fn = NULL; + int ret; + + if (nr < DRM_COMMAND_BASE) + return drm_compat_ioctl(filp, cmd, arg); + + if (nr < DRM_COMMAND_BASE + DRM_ARRAY_SIZE(r128_compat_ioctls)) + fn = r128_compat_ioctls[nr - DRM_COMMAND_BASE]; + + lock_kernel(); /* XXX for now */ + if (fn != NULL) + ret = (*fn)(filp, cmd, arg); + else + ret = drm_ioctl(filp->f_dentry->d_inode, filp, cmd, arg); + unlock_kernel(); + + return ret; +} |