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// SPDX-License-Identifier: GPL-2.0-only
/*
* evdi_ioc32.c
*
* Copyright (c) 2016 The Chromium OS Authors
* Copyright (c) 2017 - 2020 DisplayLink (UK) Ltd.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/compat.h>
#include <linux/version.h>
#if KERNEL_VERSION(5, 16, 0) <= LINUX_VERSION_CODE || defined(EL8) || defined(EL9)
#include <drm/drm_ioctl.h>
#elif KERNEL_VERSION(5, 5, 0) <= LINUX_VERSION_CODE
#else
#include <drm/drmP.h>
#endif
#include <drm/drm_edid.h>
#include "evdi_drm.h"
#include "evdi_drm_drv.h"
struct drm_evdi_connect32 {
int32_t connected;
int32_t dev_index;
uint32_t edid_ptr32;
uint32_t edid_length;
uint32_t pixel_area_limit;
uint32_t pixel_per_second_limit;
};
struct drm_evdi_grabpix32 {
uint32_t mode;
int32_t buf_width;
int32_t buf_height;
int32_t buf_byte_stride;
uint32_t buffer_ptr32;
int32_t num_rects;
uint32_t rects_ptr32;
};
static int compat_evdi_connect(struct file *file,
unsigned int __always_unused cmd,
unsigned long arg)
{
struct drm_evdi_connect32 req32;
struct drm_evdi_connect krequest;
if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
return -EFAULT;
krequest.connected = req32.connected;
krequest.dev_index = req32.dev_index;
krequest.edid = compat_ptr(req32.edid_ptr32);
krequest.edid_length = req32.edid_length;
krequest.pixel_area_limit = req32.pixel_area_limit;
krequest.pixel_per_second_limit = req32.pixel_per_second_limit;
return drm_ioctl_kernel(file, evdi_painter_connect_ioctl, &krequest, 0);
}
static int compat_evdi_grabpix(struct file *file,
unsigned int __always_unused cmd,
unsigned long arg)
{
struct drm_evdi_grabpix32 req32;
struct drm_evdi_grabpix krequest;
int ret;
if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
return -EFAULT;
krequest.mode = req32.mode;
krequest.buf_width = req32.buf_width;
krequest.buf_height = req32.buf_height;
krequest.buf_byte_stride = req32.buf_byte_stride;
krequest.buffer = compat_ptr(req32.buffer_ptr32);
krequest.num_rects = req32.num_rects;
krequest.rects = compat_ptr(req32.rects_ptr32);
ret = drm_ioctl_kernel(file, evdi_painter_grabpix_ioctl, &krequest, 0);
if (ret)
return ret;
req32.num_rects = krequest.num_rects;
if (copy_to_user((void __user *)arg, &req32, sizeof(req32)))
return -EFAULT;
return 0;
}
static drm_ioctl_compat_t *evdi_compat_ioctls[] = {
[DRM_EVDI_CONNECT] = compat_evdi_connect,
[DRM_EVDI_GRABPIX] = compat_evdi_grabpix,
};
/*
* 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 evdi_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 || nr >= DRM_COMMAND_END)
return drm_compat_ioctl(filp, cmd, arg);
if (nr < DRM_COMMAND_BASE + ARRAY_SIZE(evdi_compat_ioctls))
fn = evdi_compat_ioctls[nr - DRM_COMMAND_BASE];
if (fn != NULL)
ret = (*fn) (filp, cmd, arg);
else
ret = drm_ioctl(filp, cmd, arg);
return ret;
}
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