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