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// SPDX-License-Identifier: GPL-2.0
/*
* Driver for FPGA Accelerated Function Unit (AFU)
*
* Copyright (C) 2017-2018 Intel Corporation, Inc.
*
* Authors:
* Wu Hao <hao.wu@intel.com>
* Xiao Guangrong <guangrong.xiao@linux.intel.com>
* Joseph Grecco <joe.grecco@intel.com>
* Enno Luebbers <enno.luebbers@intel.com>
* Tim Whisonant <tim.whisonant@intel.com>
* Ananda Ravuri <ananda.ravuri@intel.com>
* Henry Mitchel <henry.mitchel@intel.com>
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include "dfl.h"
static int port_hdr_init(struct platform_device *pdev,
struct dfl_feature *feature)
{
dev_dbg(&pdev->dev, "PORT HDR Init.\n");
return 0;
}
static void port_hdr_uinit(struct platform_device *pdev,
struct dfl_feature *feature)
{
dev_dbg(&pdev->dev, "PORT HDR UInit.\n");
}
static const struct dfl_feature_ops port_hdr_ops = {
.init = port_hdr_init,
.uinit = port_hdr_uinit,
};
static struct dfl_feature_driver port_feature_drvs[] = {
{
.id = PORT_FEATURE_ID_HEADER,
.ops = &port_hdr_ops,
},
{
.ops = NULL,
}
};
static int afu_open(struct inode *inode, struct file *filp)
{
struct platform_device *fdev = dfl_fpga_inode_to_feature_dev(inode);
struct dfl_feature_platform_data *pdata;
int ret;
pdata = dev_get_platdata(&fdev->dev);
if (WARN_ON(!pdata))
return -ENODEV;
ret = dfl_feature_dev_use_begin(pdata);
if (ret)
return ret;
dev_dbg(&fdev->dev, "Device File Open\n");
filp->private_data = fdev;
return 0;
}
static int afu_release(struct inode *inode, struct file *filp)
{
struct platform_device *pdev = filp->private_data;
struct dfl_feature_platform_data *pdata;
dev_dbg(&pdev->dev, "Device File Release\n");
pdata = dev_get_platdata(&pdev->dev);
dfl_feature_dev_use_end(pdata);
return 0;
}
static long afu_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
struct platform_device *pdev = filp->private_data;
struct dfl_feature_platform_data *pdata;
struct dfl_feature *f;
long ret;
dev_dbg(&pdev->dev, "%s cmd 0x%x\n", __func__, cmd);
pdata = dev_get_platdata(&pdev->dev);
switch (cmd) {
default:
/*
* Let sub-feature's ioctl function to handle the cmd
* Sub-feature's ioctl returns -ENODEV when cmd is not
* handled in this sub feature, and returns 0 and other
* error code if cmd is handled.
*/
dfl_fpga_dev_for_each_feature(pdata, f)
if (f->ops && f->ops->ioctl) {
ret = f->ops->ioctl(pdev, f, cmd, arg);
if (ret != -ENODEV)
return ret;
}
}
return -EINVAL;
}
static const struct file_operations afu_fops = {
.owner = THIS_MODULE,
.open = afu_open,
.release = afu_release,
.unlocked_ioctl = afu_ioctl,
};
static int afu_probe(struct platform_device *pdev)
{
int ret;
dev_dbg(&pdev->dev, "%s\n", __func__);
ret = dfl_fpga_dev_feature_init(pdev, port_feature_drvs);
if (ret)
return ret;
ret = dfl_fpga_dev_ops_register(pdev, &afu_fops, THIS_MODULE);
if (ret)
dfl_fpga_dev_feature_uinit(pdev);
return ret;
}
static int afu_remove(struct platform_device *pdev)
{
dev_dbg(&pdev->dev, "%s\n", __func__);
dfl_fpga_dev_ops_unregister(pdev);
dfl_fpga_dev_feature_uinit(pdev);
return 0;
}
static struct platform_driver afu_driver = {
.driver = {
.name = DFL_FPGA_FEATURE_DEV_PORT,
},
.probe = afu_probe,
.remove = afu_remove,
};
module_platform_driver(afu_driver);
MODULE_DESCRIPTION("FPGA Accelerated Function Unit driver");
MODULE_AUTHOR("Intel Corporation");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:dfl-port");
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