diff options
Diffstat (limited to 'drivers/fpga/dfl-afu-main.c')
| -rw-r--r-- | drivers/fpga/dfl-afu-main.c | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/drivers/fpga/dfl-afu-main.c b/drivers/fpga/dfl-afu-main.c new file mode 100644 index 000000000000..08f88cdb3bfc --- /dev/null +++ b/drivers/fpga/dfl-afu-main.c @@ -0,0 +1,162 @@ +// 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"); |