// SPDX-License-Identifier: GPL-2.0 /* * Driver for FPGA Accelerated Function Unit (AFU) * * Copyright (C) 2017-2018 Intel Corporation, Inc. * * Authors: * Wu Hao <[email protected]> * Xiao Guangrong <[email protected]> * Joseph Grecco <[email protected]> * Enno Luebbers <[email protected]> * Tim Whisonant <[email protected]> * Ananda Ravuri <[email protected]> * Henry Mitchel <[email protected]> */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/uaccess.h> #include <linux/fpga-dfl.h> #include "dfl-afu.h" #define RST_POLL_INVL … #define RST_POLL_TIMEOUT … /** * __afu_port_enable - enable a port by clear reset * @pdev: port platform device. * * Enable Port by clear the port soft reset bit, which is set by default. * The AFU is unable to respond to any MMIO access while in reset. * __afu_port_enable function should only be used after __afu_port_disable * function. * * The caller needs to hold lock for protection. */ int __afu_port_enable(struct platform_device *pdev) { … } /** * __afu_port_disable - disable a port by hold reset * @pdev: port platform device. * * Disable Port by setting the port soft reset bit, it puts the port into reset. * * The caller needs to hold lock for protection. */ int __afu_port_disable(struct platform_device *pdev) { … } /* * This function resets the FPGA Port and its accelerator (AFU) by function * __port_disable and __port_enable (set port soft reset bit and then clear * it). Userspace can do Port reset at any time, e.g. during DMA or Partial * Reconfiguration. But it should never cause any system level issue, only * functional failure (e.g. DMA or PR operation failure) and be recoverable * from the failure. * * Note: the accelerator (AFU) is not accessible when its port is in reset * (disabled). Any attempts on MMIO access to AFU while in reset, will * result errors reported via port error reporting sub feature (if present). */ static int __port_reset(struct platform_device *pdev) { … } static int port_reset(struct platform_device *pdev) { … } static int port_get_id(struct platform_device *pdev) { … } static ssize_t id_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR_RO(id); static ssize_t ltr_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t ltr_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static DEVICE_ATTR_RW(ltr); static ssize_t ap1_event_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t ap1_event_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static DEVICE_ATTR_RW(ap1_event); static ssize_t ap2_event_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t ap2_event_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static DEVICE_ATTR_RW(ap2_event); static ssize_t power_state_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR_RO(power_state); static ssize_t userclk_freqcmd_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static DEVICE_ATTR_WO(userclk_freqcmd); static ssize_t userclk_freqcntrcmd_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static DEVICE_ATTR_WO(userclk_freqcntrcmd); static ssize_t userclk_freqsts_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR_RO(userclk_freqsts); static ssize_t userclk_freqcntrsts_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR_RO(userclk_freqcntrsts); static struct attribute *port_hdr_attrs[] = …; static umode_t port_hdr_attrs_visible(struct kobject *kobj, struct attribute *attr, int n) { … } static const struct attribute_group port_hdr_group = …; static int port_hdr_init(struct platform_device *pdev, struct dfl_feature *feature) { … } static long port_hdr_ioctl(struct platform_device *pdev, struct dfl_feature *feature, unsigned int cmd, unsigned long arg) { … } static const struct dfl_feature_id port_hdr_id_table[] = …; static const struct dfl_feature_ops port_hdr_ops = …; static ssize_t afu_id_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR_RO(afu_id); static struct attribute *port_afu_attrs[] = …; static umode_t port_afu_attrs_visible(struct kobject *kobj, struct attribute *attr, int n) { … } static const struct attribute_group port_afu_group = …; static int port_afu_init(struct platform_device *pdev, struct dfl_feature *feature) { … } static const struct dfl_feature_id port_afu_id_table[] = …; static const struct dfl_feature_ops port_afu_ops = …; static int port_stp_init(struct platform_device *pdev, struct dfl_feature *feature) { … } static const struct dfl_feature_id port_stp_id_table[] = …; static const struct dfl_feature_ops port_stp_ops = …; static long port_uint_ioctl(struct platform_device *pdev, struct dfl_feature *feature, unsigned int cmd, unsigned long arg) { … } static const struct dfl_feature_id port_uint_id_table[] = …; static const struct dfl_feature_ops port_uint_ops = …; static struct dfl_feature_driver port_feature_drvs[] = …; static int afu_open(struct inode *inode, struct file *filp) { … } static int afu_release(struct inode *inode, struct file *filp) { … } static long afu_ioctl_check_extension(struct dfl_feature_platform_data *pdata, unsigned long arg) { … } static long afu_ioctl_get_info(struct dfl_feature_platform_data *pdata, void __user *arg) { … } static long afu_ioctl_get_region_info(struct dfl_feature_platform_data *pdata, void __user *arg) { … } static long afu_ioctl_dma_map(struct dfl_feature_platform_data *pdata, void __user *arg) { … } static long afu_ioctl_dma_unmap(struct dfl_feature_platform_data *pdata, void __user *arg) { … } static long afu_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) { … } static const struct vm_operations_struct afu_vma_ops = …; static int afu_mmap(struct file *filp, struct vm_area_struct *vma) { … } static const struct file_operations afu_fops = …; static int afu_dev_init(struct platform_device *pdev) { … } static int afu_dev_destroy(struct platform_device *pdev) { … } static int port_enable_set(struct platform_device *pdev, bool enable) { … } static struct dfl_fpga_port_ops afu_port_ops = …; static int afu_probe(struct platform_device *pdev) { … } static void afu_remove(struct platform_device *pdev) { … } static const struct attribute_group *afu_dev_groups[] = …; static struct platform_driver afu_driver = …; static int __init afu_init(void) { … } static void __exit afu_exit(void) { … } module_init(…) …; module_exit(afu_exit); MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …; MODULE_ALIAS(…) …;
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