cregit-Linux how code gets into the kernel

Release 4.11 drivers/misc/mic/card/mic_debugfs.c

/*
 * Intel MIC Platform Software Stack (MPSS)
 *
 * Copyright(c) 2013 Intel Corporation.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2, as
 * published by the Free Software Foundation.
 *
 * 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.
 *
 * The full GNU General Public License is included in this distribution in
 * the file called "COPYING".
 *
 * Disclaimer: The codes contained in these modules may be specific to
 * the Intel Software Development Platform codenamed: Knights Ferry, and
 * the Intel product codenamed: Knights Corner, and are not backward
 * compatible with other Intel products. Additionally, Intel will NOT
 * support the codes or instruction set in future products.
 *
 * Intel MIC Card driver.
 *
 */
#include <linux/debugfs.h>
#include <linux/delay.h>
#include <linux/seq_file.h>
#include <linux/interrupt.h>
#include <linux/device.h>

#include "../common/mic_dev.h"
#include "mic_device.h"

/* Debugfs parent dir */

static struct dentry *mic_dbg;

/**
 * mic_intr_test - Send interrupts to host.
 */

static int mic_intr_test(struct seq_file *s, void *unused) { struct mic_driver *mdrv = s->private; struct mic_device *mdev = &mdrv->mdev; mic_send_intr(mdev, 0); msleep(1000); mic_send_intr(mdev, 1); msleep(1000); mic_send_intr(mdev, 2); msleep(1000); mic_send_intr(mdev, 3); msleep(1000); return 0; }

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static int mic_intr_test_open(struct inode *inode, struct file *file) { return single_open(file, mic_intr_test, inode->i_private); }

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static int mic_intr_test_release(struct inode *inode, struct file *file) { return single_release(inode, file); }

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static const struct file_operations intr_test_ops = { .owner = THIS_MODULE, .open = mic_intr_test_open, .read = seq_read, .llseek = seq_lseek, .release = mic_intr_test_release }; /** * mic_create_card_debug_dir - Initialize MIC debugfs entries. */
void __init mic_create_card_debug_dir(struct mic_driver *mdrv) { struct dentry *d; if (!mic_dbg) return; mdrv->dbg_dir = debugfs_create_dir(mdrv->name, mic_dbg); if (!mdrv->dbg_dir) { dev_err(mdrv->dev, "Cant create dbg_dir %s\n", mdrv->name); return; } d = debugfs_create_file("intr_test", 0444, mdrv->dbg_dir, mdrv, &intr_test_ops); if (!d) { dev_err(mdrv->dev, "Cant create dbg intr_test %s\n", mdrv->name); return; } }

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/** * mic_delete_card_debug_dir - Uninitialize MIC debugfs entries. */
void mic_delete_card_debug_dir(struct mic_driver *mdrv) { if (!mdrv->dbg_dir) return; debugfs_remove_recursive(mdrv->dbg_dir); }

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/** * mic_init_card_debugfs - Initialize global debugfs entry. */
void __init mic_init_card_debugfs(void) { mic_dbg = debugfs_create_dir(KBUILD_MODNAME, NULL); if (!mic_dbg) pr_err("can't create debugfs dir\n"); }

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/** * mic_exit_card_debugfs - Uninitialize global debugfs entry */
void mic_exit_card_debugfs(void) { debugfs_remove(mic_dbg); }

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