drm_ioc32.c

linux-2.6.15.6

			  &d->request_indices)
	    || __put_user((int __user *)(unsigned long)d32.request_sizes,
			  &d->request_sizes))
		return -EFAULT;

	err = drm_ioctl(file->f_dentry->d_inode, file,
			DRM_IOCTL_DMA, (unsigned long)d);
	if (err)
		return err;

	if (__get_user(d32.request_size, &d->request_size)
	    || __get_user(d32.granted_count, &d->granted_count)
	    || __put_user(d32.request_size, &argp->request_size)
	    || __put_user(d32.granted_count, &argp->granted_count))
		return -EFAULT;

	return 0;
}

#if __OS_HAS_AGP
typedef struct drm_agp_mode32 {
	u32 mode;	/**< AGP mode */
} drm_agp_mode32_t;

static int compat_drm_agp_enable(struct file *file, unsigned int cmd,
				 unsigned long arg)
{
	drm_agp_mode32_t __user *argp = (void __user *)arg;
	drm_agp_mode32_t m32;
	drm_agp_mode_t __user *mode;

	if (get_user(m32.mode, &argp->mode))
		return -EFAULT;

	mode = compat_alloc_user_space(sizeof(*mode));
	if (put_user(m32.mode, &mode->mode))
		return -EFAULT;

	return drm_ioctl(file->f_dentry->d_inode, file,
			 DRM_IOCTL_AGP_ENABLE, (unsigned long)mode);
}

typedef struct drm_agp_info32 {
	int agp_version_major;
	int agp_version_minor;
	u32 mode;
	u32 aperture_base;	/* physical address */
	u32 aperture_size;	/* bytes */
	u32 memory_allowed;	/* bytes */
	u32 memory_used;

	/* PCI information */
	unsigned short id_vendor;
	unsigned short id_device;
} drm_agp_info32_t;

static int compat_drm_agp_info(struct file *file, unsigned int cmd,
			       unsigned long arg)
{
	drm_agp_info32_t __user *argp = (void __user *)arg;
	drm_agp_info32_t i32;
	drm_agp_info_t __user *info;
	int err;

	info = compat_alloc_user_space(sizeof(*info));
	if (!access_ok(VERIFY_WRITE, info, sizeof(*info)))
		return -EFAULT;

	err = drm_ioctl(file->f_dentry->d_inode, file,
			DRM_IOCTL_AGP_INFO, (unsigned long)info);
	if (err)
		return err;

	if (__get_user(i32.agp_version_major, &info->agp_version_major)
	    || __get_user(i32.agp_version_minor, &info->agp_version_minor)
	    || __get_user(i32.mode, &info->mode)
	    || __get_user(i32.aperture_base, &info->aperture_base)
	    || __get_user(i32.aperture_size, &info->aperture_size)
	    || __get_user(i32.memory_allowed, &info->memory_allowed)
	    || __get_user(i32.memory_used, &info->memory_used)
	    || __get_user(i32.id_vendor, &info->id_vendor)
	    || __get_user(i32.id_device, &info->id_device))
		return -EFAULT;

	if (copy_to_user(argp, &i32, sizeof(i32)))
		return -EFAULT;

	return 0;
}

typedef struct drm_agp_buffer32 {
	u32 size;	/**< In bytes -- will round to page boundary */
	u32 handle;	/**< Used for binding / unbinding */
	u32 type;	/**< Type of memory to allocate */
	u32 physical;	/**< Physical used by i810 */
} drm_agp_buffer32_t;

static int compat_drm_agp_alloc(struct file *file, unsigned int cmd,
				unsigned long arg)
{
	drm_agp_buffer32_t __user *argp = (void __user *)arg;
	drm_agp_buffer32_t req32;
	drm_agp_buffer_t __user *request;
	int err;

	if (copy_from_user(&req32, argp, sizeof(req32)))
		return -EFAULT;

	request = compat_alloc_user_space(sizeof(*request));
	if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
	    || __put_user(req32.size, &request->size)
	    || __put_user(req32.type, &request->type))
		return -EFAULT;

	err = drm_ioctl(file->f_dentry->d_inode, file,
			DRM_IOCTL_AGP_ALLOC, (unsigned long)request);
	if (err)
		return err;

	if (__get_user(req32.handle, &request->handle)
	    || __get_user(req32.physical, &request->physical)
	    || copy_to_user(argp, &req32, sizeof(req32))) {
		drm_ioctl(file->f_dentry->d_inode, file,
			  DRM_IOCTL_AGP_FREE, (unsigned long)request);
		return -EFAULT;
	}

	return 0;
}

static int compat_drm_agp_free(struct file *file, unsigned int cmd,
			       unsigned long arg)
{
	drm_agp_buffer32_t __user *argp = (void __user *)arg;
	drm_agp_buffer_t __user *request;
	u32 handle;

	request = compat_alloc_user_space(sizeof(*request));
	if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
	    || get_user(handle, &argp->handle)
	    || __put_user(handle, &request->handle))
		return -EFAULT;

	return drm_ioctl(file->f_dentry->d_inode, file,
			 DRM_IOCTL_AGP_FREE, (unsigned long)request);
}

typedef struct drm_agp_binding32 {
	u32 handle;	/**< From drm_agp_buffer */
	u32 offset;	/**< In bytes -- will round to page boundary */
} drm_agp_binding32_t;

static int compat_drm_agp_bind(struct file *file, unsigned int cmd,
			       unsigned long arg)
{
	drm_agp_binding32_t __user *argp = (void __user *)arg;
	drm_agp_binding32_t req32;
	drm_agp_binding_t __user *request;

	if (copy_from_user(&req32, argp, sizeof(req32)))
		return -EFAULT;

	request = compat_alloc_user_space(sizeof(*request));
	if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
	    || __put_user(req32.handle, &request->handle)
	    || __put_user(req32.offset, &request->offset))
		return -EFAULT;

	return drm_ioctl(file->f_dentry->d_inode, file,
			 DRM_IOCTL_AGP_BIND, (unsigned long)request);
}

static int compat_drm_agp_unbind(struct file *file, unsigned int cmd,
				 unsigned long arg)
{
	drm_agp_binding32_t __user *argp = (void __user *)arg;
	drm_agp_binding_t __user *request;
	u32 handle;

	request = compat_alloc_user_space(sizeof(*request));
	if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
	    || get_user(handle, &argp->handle)
	    || __put_user(handle, &request->handle))
		return -EFAULT;

	return drm_ioctl(file->f_dentry->d_inode, file,
			 DRM_IOCTL_AGP_UNBIND, (unsigned long)request);
}
#endif				/* __OS_HAS_AGP */

typedef struct drm_scatter_gather32 {
	u32 size;	/**< In bytes -- will round to page boundary */
	u32 handle;	/**< Used for mapping / unmapping */
} drm_scatter_gather32_t;

static int compat_drm_sg_alloc(struct file *file, unsigned int cmd,
			       unsigned long arg)
{
	drm_scatter_gather32_t __user *argp = (void __user *)arg;
	drm_scatter_gather_t __user *request;
	int err;
	unsigned long x;

	request = compat_alloc_user_space(sizeof(*request));
	if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
	    || !access_ok(VERIFY_WRITE, argp, sizeof(*argp))
	    || __get_user(x, &argp->size)
	    || __put_user(x, &request->size))
		return -EFAULT;

	err = drm_ioctl(file->f_dentry->d_inode, file,
			DRM_IOCTL_SG_ALLOC, (unsigned long)request);
	if (err)
		return err;

	/* XXX not sure about the handle conversion here... */
	if (__get_user(x, &request->handle)
	    || __put_user(x >> PAGE_SHIFT, &argp->handle))
		return -EFAULT;

	return 0;
}

static int compat_drm_sg_free(struct file *file, unsigned int cmd,
			      unsigned long arg)
{
	drm_scatter_gather32_t __user *argp = (void __user *)arg;
	drm_scatter_gather_t __user *request;
	unsigned long x;

	request = compat_alloc_user_space(sizeof(*request));
	if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
	    || !access_ok(VERIFY_WRITE, argp, sizeof(*argp))
	    || __get_user(x, &argp->handle)
	    || __put_user(x << PAGE_SHIFT, &request->handle))
		return -EFAULT;

	return drm_ioctl(file->f_dentry->d_inode, file,
			 DRM_IOCTL_SG_FREE, (unsigned long)request);
}

struct drm_wait_vblank_request32 {
	drm_vblank_seq_type_t type;
	unsigned int sequence;
	u32 signal;
};

struct drm_wait_vblank_reply32 {
	drm_vblank_seq_type_t type;
	unsigned int sequence;
	s32 tval_sec;
	s32 tval_usec;
};

typedef union drm_wait_vblank32 {
	struct drm_wait_vblank_request32 request;
	struct drm_wait_vblank_reply32 reply;
} drm_wait_vblank32_t;

static int compat_drm_wait_vblank(struct file *file, unsigned int cmd,
				  unsigned long arg)
{
	drm_wait_vblank32_t __user *argp = (void __user *)arg;
	drm_wait_vblank32_t req32;
	drm_wait_vblank_t __user *request;
	int err;

	if (copy_from_user(&req32, argp, sizeof(req32)))
		return -EFAULT;

	request = compat_alloc_user_space(sizeof(*request));
	if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
	    || __put_user(req32.request.type, &request->request.type)
	    || __put_user(req32.request.sequence, &request->request.sequence)
	    || __put_user(req32.request.signal, &request->request.signal))
		return -EFAULT;

	err = drm_ioctl(file->f_dentry->d_inode, file,
			DRM_IOCTL_WAIT_VBLANK, (unsigned long)request);
	if (err)
		return err;

	if (__get_user(req32.reply.type, &request->reply.type)
	    || __get_user(req32.reply.sequence, &request->reply.sequence)
	    || __get_user(req32.reply.tval_sec, &request->reply.tval_sec)
	    || __get_user(req32.reply.tval_usec, &request->reply.tval_usec))
		return -EFAULT;

	if (copy_to_user(argp, &req32, sizeof(req32)))
		return -EFAULT;

	return 0;
}

drm_ioctl_compat_t *drm_compat_ioctls[] = {
	[DRM_IOCTL_NR(DRM_IOCTL_VERSION32)] = compat_drm_version,
	[DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE32)] = compat_drm_getunique,
	[DRM_IOCTL_NR(DRM_IOCTL_GET_MAP32)] = compat_drm_getmap,
	[DRM_IOCTL_NR(DRM_IOCTL_GET_CLIENT32)] = compat_drm_getclient,
	[DRM_IOCTL_NR(DRM_IOCTL_GET_STATS32)] = compat_drm_getstats,
	[DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE32)] = compat_drm_setunique,
	[DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP32)] = compat_drm_addmap,
	[DRM_IOCTL_NR(DRM_IOCTL_ADD_BUFS32)] = compat_drm_addbufs,
	[DRM_IOCTL_NR(DRM_IOCTL_MARK_BUFS32)] = compat_drm_markbufs,
	[DRM_IOCTL_NR(DRM_IOCTL_INFO_BUFS32)] = compat_drm_infobufs,
	[DRM_IOCTL_NR(DRM_IOCTL_MAP_BUFS32)] = compat_drm_mapbufs,
	[DRM_IOCTL_NR(DRM_IOCTL_FREE_BUFS32)] = compat_drm_freebufs,
	[DRM_IOCTL_NR(DRM_IOCTL_RM_MAP32)] = compat_drm_rmmap,
	[DRM_IOCTL_NR(DRM_IOCTL_SET_SAREA_CTX32)] = compat_drm_setsareactx,
	[DRM_IOCTL_NR(DRM_IOCTL_GET_SAREA_CTX32)] = compat_drm_getsareactx,
	[DRM_IOCTL_NR(DRM_IOCTL_RES_CTX32)] = compat_drm_resctx,
	[DRM_IOCTL_NR(DRM_IOCTL_DMA32)] = compat_drm_dma,
#if __OS_HAS_AGP
	[DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE32)] = compat_drm_agp_enable,
	[DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO32)] = compat_drm_agp_info,
	[DRM_IOCTL_NR(DRM_IOCTL_AGP_ALLOC32)] = compat_drm_agp_alloc,
	[DRM_IOCTL_NR(DRM_IOCTL_AGP_FREE32)] = compat_drm_agp_free,
	[DRM_IOCTL_NR(DRM_IOCTL_AGP_BIND32)] = compat_drm_agp_bind,
	[DRM_IOCTL_NR(DRM_IOCTL_AGP_UNBIND32)] = compat_drm_agp_unbind,
#endif
	[DRM_IOCTL_NR(DRM_IOCTL_SG_ALLOC32)] = compat_drm_sg_alloc,
	[DRM_IOCTL_NR(DRM_IOCTL_SG_FREE32)] = compat_drm_sg_free,
	[DRM_IOCTL_NR(DRM_IOCTL_WAIT_VBLANK32)] = compat_drm_wait_vblank,
};

/**
 * Called whenever a 32-bit process running under a 64-bit kernel
 * performs an ioctl on /dev/drm.
 *
 * \param filp file pointer.
 * \param cmd command.
 * \param arg user argument.
 * \return zero on success or negative number on failure.
 */
long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
	unsigned int nr = DRM_IOCTL_NR(cmd);
	drm_ioctl_compat_t *fn;
	int ret;

	if (nr >= DRM_ARRAY_SIZE(drm_compat_ioctls))
		return -ENOTTY;

	fn = drm_compat_ioctls[nr];

	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;
}

EXPORT_SYMBOL(drm_compat_ioctl);