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/**
* \file i915_ioc32.c
*
* 32-bit ioctl compatibility routines for the i915 DRM.
*
* \author Alan Hourihane <alanh@fairlite.demon.co.uk>
*
*
* Copyright (C) Paul Mackerras 2005
* Copyright (C) Alan Hourihane 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/i915_drm.h>
#include "i915_drv.h"
typedef struct _drm_i915_batchbuffer32 {
int start; /* agp offset */
int used; /* nr bytes in use */
int DR1; /* hw flags for GFX_OP_DRAWRECT_INFO */
int DR4; /* window origin for GFX_OP_DRAWRECT_INFO */
int num_cliprects; /* mulitpass with multiple cliprects? */
u32 cliprects; /* pointer to userspace cliprects */
} drm_i915_batchbuffer32_t;
static int compat_i915_batchbuffer(struct file *file, unsigned int cmd,
unsigned long arg)
{
drm_i915_batchbuffer32_t batchbuffer32;
drm_i915_batchbuffer_t __user *batchbuffer;
if (copy_from_user
(&batchbuffer32, (void __user *)arg, sizeof(batchbuffer32)))
return -EFAULT;
batchbuffer = compat_alloc_user_space(sizeof(*batchbuffer));
if (!access_ok(VERIFY_WRITE, batchbuffer, sizeof(*batchbuffer))
|| __put_user(batchbuffer32.start, &batchbuffer->start)
|| __put_user(batchbuffer32.used, &batchbuffer->used)
|| __put_user(batchbuffer32.DR1, &batchbuffer->DR1)
|| __put_user(batchbuffer32.DR4, &batchbuffer->DR4)
|| __put_user(batchbuffer32.num_cliprects,
&batchbuffer->num_cliprects)
|| __put_user((int __user *)(unsigned long)batchbuffer32.cliprects,
&batchbuffer->cliprects))
return -EFAULT;
return drm_ioctl(file, DRM_IOCTL_I915_BATCHBUFFER,
(unsigned long)batchbuffer);
}
typedef struct _drm_i915_cmdbuffer32 {
u32 buf; /* pointer to userspace command buffer */
int sz; /* nr bytes in buf */
int DR1; /* hw flags for GFX_OP_DRAWRECT_INFO */
int DR4; /* window origin for GFX_OP_DRAWRECT_INFO */
int num_cliprects; /* mulitpass with multiple cliprects? */
u32 cliprects; /* pointer to userspace cliprects */
} drm_i915_cmdbuffer32_t;
static int compat_i915_cmdbuffer(struct file *file, unsigned int cmd,
unsigned long arg)
{
drm_i915_cmdbuffer32_t cmdbuffer32;
drm_i915_cmdbuffer_t __user *cmdbuffer;
if (copy_from_user
(&cmdbuffer32, (void __user *)arg, sizeof(cmdbuffer32)))
return -EFAULT;
cmdbuffer = compat_alloc_user_space(sizeof(*cmdbuffer));
if (!access_ok(VERIFY_WRITE, cmdbuffer, sizeof(*cmdbuffer))
|| __put_user((int __user *)(unsigned long)cmdbuffer32.buf,
&cmdbuffer->buf)
|| __put_user(cmdbuffer32.sz, &cmdbuffer->sz)
|| __put_user(cmdbuffer32.DR1, &cmdbuffer->DR1)
|| __put_user(cmdbuffer32.DR4, &cmdbuffer->DR4)
|| __put_user(cmdbuffer32.num_cliprects, &cmdbuffer->num_cliprects)
|| __put_user((int __user *)(unsigned long)cmdbuffer32.cliprects,
&cmdbuffer->cliprects))
return -EFAULT;
return drm_ioctl(file, DRM_IOCTL_I915_CMDBUFFER,
(unsigned long)cmdbuffer);
}
typedef struct drm_i915_irq_emit32 {
u32 irq_seq;
} drm_i915_irq_emit32_t;
static int compat_i915_irq_emit(struct file *file, unsigned int cmd,
unsigned long arg)
{
drm_i915_irq_emit32_t req32;
drm_i915_irq_emit_t __user *request;
if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
return -EFAULT;
request = compat_alloc_user_space(sizeof(*request));
if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
|| __put_user((int __user *)(unsigned long)req32.irq_seq,
&request->irq_seq))
return -EFAULT;
return drm_ioctl(file, DRM_IOCTL_I915_IRQ_EMIT,
(unsigned long)request);
}
typedef struct drm_i915_getparam32 {
int param;
u32 value;
} drm_i915_getparam32_t;
static int compat_i915_getparam(struct file *file, unsigned int cmd,
unsigned long arg)
{
drm_i915_getparam32_t req32;
drm_i915_getparam_t __user *request;
if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
return -EFAULT;
request = compat_alloc_user_space(sizeof(*request));
if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
|| __put_user(req32.param, &request->param)
|| __put_user((void __user *)(unsigned long)req32.value,
&request->value))
return -EFAULT;
return drm_ioctl(file, DRM_IOCTL_I915_GETPARAM,
(unsigned long)request);
}
typedef struct drm_i915_mem_alloc32 {
int region;
int alignment;
int size;
u32 region_offset; /* offset from start of fb or agp */
} drm_i915_mem_alloc32_t;
static int compat_i915_alloc(struct file *file, unsigned int cmd,
unsigned long arg)
{
drm_i915_mem_alloc32_t req32;
drm_i915_mem_alloc_t __user *request;
if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
return -EFAULT;
request = compat_alloc_user_space(sizeof(*request));
if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
|| __put_user(req32.region, &request->region)
|| __put_user(req32.alignment, &request->alignment)
|| __put_user(req32.size, &request->size)
|| __put_user((void __user *)(unsigned long)req32.region_offset,
&request->region_offset))
return -EFAULT;
return drm_ioctl(file, DRM_IOCTL_I915_ALLOC,
(unsigned long)request);
}
static drm_ioctl_compat_t *i915_compat_ioctls[] = {
[DRM_I915_BATCHBUFFER] = compat_i915_batchbuffer,
[DRM_I915_CMDBUFFER] = compat_i915_cmdbuffer,
[DRM_I915_GETPARAM] = compat_i915_getparam,
[DRM_I915_IRQ_EMIT] = compat_i915_irq_emit,
[DRM_I915_ALLOC] = compat_i915_alloc
};
#ifdef CONFIG_COMPAT
/**
* 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 i915_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(i915_compat_ioctls))
fn = i915_compat_ioctls[nr - DRM_COMMAND_BASE];
if (fn != NULL)
ret = (*fn) (filp, cmd, arg);
else
ret = drm_ioctl(filp, cmd, arg);
return ret;
}
#endif
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