diff options
Diffstat (limited to 'drivers/gpu/drm/r128/r128_ioc32.c')
| -rw-r--r-- | drivers/gpu/drm/r128/r128_ioc32.c | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/drivers/gpu/drm/r128/r128_ioc32.c b/drivers/gpu/drm/r128/r128_ioc32.c new file mode 100644 index 000000000..cdeb1db87 --- /dev/null +++ b/drivers/gpu/drm/r128/r128_ioc32.c @@ -0,0 +1,199 @@ +/* + * \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 <drm/r128_drm.h> + +#include "r128_drv.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 init; + + if (copy_from_user(&init32, (void __user *)arg, sizeof(init32))) + return -EFAULT; + + init.func = init32.func; + init.sarea_priv_offset = init32.sarea_priv_offset; + init.is_pci = init32.is_pci; + init.cce_mode = init32.cce_mode; + init.cce_secure = init32.cce_secure; + init.ring_size = init32.ring_size; + init.usec_timeout = init32.usec_timeout; + init.fb_bpp = init32.fb_bpp; + init.front_offset = init32.front_offset; + init.front_pitch = init32.front_pitch; + init.back_offset = init32.back_offset; + init.back_pitch = init32.back_pitch; + init.depth_bpp = init32.depth_bpp; + init.depth_offset = init32.depth_offset; + init.depth_pitch = init32.depth_pitch; + init.span_offset = init32.span_offset; + init.fb_offset = init32.fb_offset; + init.mmio_offset = init32.mmio_offset; + init.ring_offset = init32.ring_offset; + init.ring_rptr_offset = init32.ring_rptr_offset; + init.buffers_offset = init32.buffers_offset; + init.agp_textures_offset = init32.agp_textures_offset; + + return drm_ioctl_kernel(file, r128_cce_init, &init, + DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); +} + +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 depth; + + if (copy_from_user(&depth32, (void __user *)arg, sizeof(depth32))) + return -EFAULT; + + depth.func = depth32.func; + depth.n = depth32.n; + depth.x = compat_ptr(depth32.x); + depth.y = compat_ptr(depth32.y); + depth.buffer = compat_ptr(depth32.buffer); + depth.mask = compat_ptr(depth32.mask); + + return drm_ioctl_kernel(file, r128_cce_depth, &depth, DRM_AUTH); +} + +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 stipple; + + if (copy_from_user(&stipple32, (void __user *)arg, sizeof(stipple32))) + return -EFAULT; + + stipple.mask = compat_ptr(stipple32.mask); + + return drm_ioctl_kernel(file, r128_cce_stipple, &stipple, DRM_AUTH); +} + +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 getparam; + + if (copy_from_user(&getparam32, (void __user *)arg, sizeof(getparam32))) + return -EFAULT; + + getparam.param = getparam32.param; + getparam.value = compat_ptr(getparam32.value); + + return drm_ioctl_kernel(file, r128_getparam, &getparam, DRM_AUTH); +} + +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, +}; + +/** + * r128_compat_ioctl - Called whenever a 32-bit process running under + * a 64-bit kernel performs an ioctl on /dev/dri/card<n>. + * + * @filp: file pointer. + * @cmd: command. + * @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 + ARRAY_SIZE(r128_compat_ioctls)) + fn = r128_compat_ioctls[nr - DRM_COMMAND_BASE]; + + if (fn != NULL) + ret = (*fn) (filp, cmd, arg); + else + ret = drm_ioctl(filp, cmd, arg); + + return ret; +} |