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/**
* \file mga_ioc32.c
*
* 32-bit ioctl compatibility routines for the MGA 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/drmP.h>
#include <drm/mga_drm.h>
#include "mga_drv.h"
typedef struct drm32_mga_init {
int func;
u32 sarea_priv_offset;
int chipset;
int sgram;
unsigned int maccess;
unsigned int fb_cpp;
unsigned int front_offset, front_pitch;
unsigned int back_offset, back_pitch;
unsigned int depth_cpp;
unsigned int depth_offset, depth_pitch;
unsigned int texture_offset[MGA_NR_TEX_HEAPS];
unsigned int texture_size[MGA_NR_TEX_HEAPS];
u32 fb_offset;
u32 mmio_offset;
u32 status_offset;
u32 warp_offset;
u32 primary_offset;
u32 buffers_offset;
} drm_mga_init32_t;
static int compat_mga_init(struct file *file, unsigned int cmd,
unsigned long arg)
{
drm_mga_init32_t init32;
drm_mga_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;
memcpy(&init.chipset, &init32.chipset,
offsetof(drm_mga_init_t, fb_offset) -
offsetof(drm_mga_init_t, chipset));
init.fb_offset = init32.fb_offset;
init.mmio_offset = init32.mmio_offset;
init.status_offset = init32.status_offset;
init.warp_offset = init32.warp_offset;
init.primary_offset = init32.primary_offset;
init.buffers_offset = init32.buffers_offset;
return drm_ioctl_kernel(file, mga_dma_init, &init,
DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
}
typedef struct drm_mga_getparam32 {
int param;
u32 value;
} drm_mga_getparam32_t;
static int compat_mga_getparam(struct file *file, unsigned int cmd,
unsigned long arg)
{
drm_mga_getparam32_t getparam32;
drm_mga_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, mga_getparam, &getparam, DRM_AUTH);
}
typedef struct drm_mga_drm_bootstrap32 {
u32 texture_handle;
u32 texture_size;
u32 primary_size;
u32 secondary_bin_count;
u32 secondary_bin_size;
u32 agp_mode;
u8 agp_size;
} drm_mga_dma_bootstrap32_t;
static int compat_mga_dma_bootstrap(struct file *file, unsigned int cmd,
unsigned long arg)
{
drm_mga_dma_bootstrap32_t dma_bootstrap32;
drm_mga_dma_bootstrap_t dma_bootstrap;
int err;
if (copy_from_user(&dma_bootstrap32, (void __user *)arg,
sizeof(dma_bootstrap32)))
return -EFAULT;
dma_bootstrap.texture_handle = dma_bootstrap32.texture_handle;
dma_bootstrap.texture_size = dma_bootstrap32.texture_size;
dma_bootstrap.primary_size = dma_bootstrap32.primary_size;
dma_bootstrap.secondary_bin_count = dma_bootstrap32.secondary_bin_count;
dma_bootstrap.secondary_bin_size = dma_bootstrap32.secondary_bin_size;
dma_bootstrap.agp_mode = dma_bootstrap32.agp_mode;
dma_bootstrap.agp_size = dma_bootstrap32.agp_size;
err = drm_ioctl_kernel(file, mga_dma_bootstrap, &dma_bootstrap,
DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
if (err)
return err;
dma_bootstrap32.texture_handle = dma_bootstrap.texture_handle;
dma_bootstrap32.texture_size = dma_bootstrap.texture_size;
dma_bootstrap32.primary_size = dma_bootstrap.primary_size;
dma_bootstrap32.secondary_bin_count = dma_bootstrap.secondary_bin_count;
dma_bootstrap32.secondary_bin_size = dma_bootstrap.secondary_bin_size;
dma_bootstrap32.agp_mode = dma_bootstrap.agp_mode;
dma_bootstrap32.agp_size = dma_bootstrap.agp_size;
if (copy_to_user((void __user *)arg, &dma_bootstrap32,
sizeof(dma_bootstrap32)))
return -EFAULT;
return 0;
}
static struct {
drm_ioctl_compat_t *fn;
char *name;
} mga_compat_ioctls[] = {
#define DRM_IOCTL32_DEF(n, f)[DRM_##n] = {.fn = f, .name = #n}
DRM_IOCTL32_DEF(MGA_INIT, compat_mga_init),
DRM_IOCTL32_DEF(MGA_GETPARAM, compat_mga_getparam),
DRM_IOCTL32_DEF(MGA_DMA_BOOTSTRAP, compat_mga_dma_bootstrap),
};
/**
* 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 mga_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
unsigned int nr = DRM_IOCTL_NR(cmd);
struct drm_file *file_priv = filp->private_data;
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(mga_compat_ioctls))
return drm_ioctl(filp, cmd, arg);
fn = mga_compat_ioctls[nr - DRM_COMMAND_BASE].fn;
if (!fn)
return drm_ioctl(filp, cmd, arg);
DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",
task_pid_nr(current),
(long)old_encode_dev(file_priv->minor->kdev->devt),
file_priv->authenticated,
mga_compat_ioctls[nr - DRM_COMMAND_BASE].name);
ret = (*fn) (filp, cmd, arg);
if (ret)
DRM_DEBUG("ret = %d\n", ret);
return ret;
}
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