cregit-Linux how code gets into the kernel

Release 4.7 drivers/pci/hotplug/cpqphp_sysfs.c

Directory: drivers/pci/hotplug
/*
 * Compaq Hot Plug Controller Driver
 *
 * Copyright (C) 1995,2001 Compaq Computer Corporation
 * Copyright (C) 2001,2003 Greg Kroah-Hartman (greg@kroah.com)
 * Copyright (C) 2001 IBM Corp.
 *
 * All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or (at
 * your option) any later version.
 *
 * 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, GOOD TITLE or
 * NON INFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * Send feedback to <greg@kroah.com>
 *
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/proc_fs.h>
#include <linux/workqueue.h>
#include <linux/pci.h>
#include <linux/pci_hotplug.h>
#include <linux/mutex.h>
#include <linux/debugfs.h>
#include "cpqphp.h"

static DEFINE_MUTEX(cpqphp_mutex);



static int show_ctrl(struct controller *ctrl, char *buf)
{
	char *out = buf;
	int index;
	struct pci_resource *res;

	out += sprintf(buf, "Free resources: memory\n");
	index = 11;
	res = ctrl->mem_head;
	while (res && index--) {
		out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
		res = res->next;
	}
	out += sprintf(out, "Free resources: prefetchable memory\n");
	index = 11;
	res = ctrl->p_mem_head;
	while (res && index--) {
		out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
		res = res->next;
	}
	out += sprintf(out, "Free resources: IO\n");
	index = 11;
	res = ctrl->io_head;
	while (res && index--) {
		out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
		res = res->next;
	}
	out += sprintf(out, "Free resources: bus numbers\n");
	index = 11;
	res = ctrl->bus_head;
	while (res && index--) {
		out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
		res = res->next;
	}

	return out - buf;
}


Contributors
PersonTokensPropCommitsCommitProp
linus torvaldslinus torvalds22895.80%125.00%


greg kroah-hartmangreg kroah-hartman83.36%250.00%


yani ioannouyani ioannou20.84%125.00%


Total238100.00%4100.00%






static int show_dev(struct controller *ctrl, char *buf)
{
	char *out = buf;
	int index;
	struct pci_resource *res;
	struct pci_func *new_slot;
	struct slot *slot;

	slot = ctrl->slot;

	while (slot) {
		new_slot = cpqhp_slot_find(slot->bus, slot->device, 0);
		if (!new_slot)
			break;
		out += sprintf(out, "assigned resources: memory\n");
		index = 11;
		res = new_slot->mem_head;
		while (res && index--) {
			out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
			res = res->next;
		}
		out += sprintf(out, "assigned resources: prefetchable memory\n");
		index = 11;
		res = new_slot->p_mem_head;
		while (res && index--) {
			out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
			res = res->next;
		}
		out += sprintf(out, "assigned resources: IO\n");
		index = 11;
		res = new_slot->io_head;
		while (res && index--) {
			out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
			res = res->next;
		}
		out += sprintf(out, "assigned resources: bus numbers\n");
		index = 11;
		res = new_slot->bus_head;
		while (res && index--) {
			out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
			res = res->next;
		}
		slot = slot->next;
	}

	return out - buf;
}


Contributors
PersonTokensPropCommitsCommitProp
linus torvaldslinus torvalds27294.77%120.00%


greg kroah-hartmangreg kroah-hartman134.53%360.00%


yani ioannouyani ioannou20.70%120.00%


Total287100.00%5100.00%






static int spew_debug_info(struct controller *ctrl, char *data, int size)
{
	int used;

	used = size - show_ctrl(ctrl, data);
	used = (size - used) - show_dev(ctrl, &data[used]);
	return used;
}


Contributors
PersonTokensPropCommitsCommitProp
greg kroah-hartmangreg kroah-hartman54100.00%1100.00%


Total54100.00%1100.00%




struct ctrl_dbg {
	
int size;
	
char *data;
	
struct controller *ctrl;
};


#define MAX_OUTPUT	(4*PAGE_SIZE)




static int open(struct inode *inode, struct file *file)
{
	struct controller *ctrl = inode->i_private;
	struct ctrl_dbg *dbg;
	int retval = -ENOMEM;

	mutex_lock(&cpqphp_mutex);
	dbg = kmalloc(sizeof(*dbg), GFP_KERNEL);
	if (!dbg)
		goto exit;
	dbg->data = kmalloc(MAX_OUTPUT, GFP_KERNEL);
	if (!dbg->data) {
		kfree(dbg);
		goto exit;
	}
	dbg->size = spew_debug_info(ctrl, dbg->data, MAX_OUTPUT);
	file->private_data = dbg;
	retval = 0;
exit:
	mutex_unlock(&cpqphp_mutex);
	return retval;
}


Contributors
PersonTokensPropCommitsCommitProp
greg kroah-hartmangreg kroah-hartman11388.98%240.00%


arnd bergmannarnd bergmann107.87%120.00%


linus torvaldslinus torvalds32.36%120.00%


theodore tsotheodore tso10.79%120.00%


Total127100.00%5100.00%






static loff_t lseek(struct file *file, loff_t off, int whence)
{
	struct ctrl_dbg *dbg = file->private_data;
	return fixed_size_llseek(file, off, whence, dbg->size);
}


Contributors
PersonTokensPropCommitsCommitProp
greg kroah-hartmangreg kroah-hartman3177.50%133.33%


al viroal viro820.00%133.33%


arnd bergmannarnd bergmann12.50%133.33%


Total40100.00%3100.00%






static ssize_t read(struct file *file, char __user *buf,
		    size_t nbytes, loff_t *ppos)
{
	struct ctrl_dbg *dbg = file->private_data;
	return simple_read_from_buffer(buf, nbytes, ppos, dbg->data, dbg->size);
}


Contributors
PersonTokensPropCommitsCommitProp
greg kroah-hartmangreg kroah-hartman50100.00%1100.00%


Total50100.00%1100.00%






static int release(struct inode *inode, struct file *file)
{
	struct ctrl_dbg *dbg = file->private_data;

	kfree(dbg->data);
	kfree(dbg);
	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
greg kroah-hartmangreg kroah-hartman40100.00%1100.00%


Total40100.00%1100.00%




static const struct file_operations debug_ops = {
	.owner = THIS_MODULE,
	.open = open,
	.llseek = lseek,
	.read = read,
	.release = release,
};


static struct dentry *root;




void cpqhp_initialize_debugfs(void)
{
	if (!root)
		root = debugfs_create_dir("cpqhp", NULL);
}


Contributors
PersonTokensPropCommitsCommitProp
greg kroah-hartmangreg kroah-hartman1885.71%266.67%


linus torvaldslinus torvalds314.29%133.33%


Total21100.00%3100.00%






void cpqhp_shutdown_debugfs(void)
{
	debugfs_remove(root);
}


Contributors
PersonTokensPropCommitsCommitProp
greg kroah-hartmangreg kroah-hartman12100.00%1100.00%


Total12100.00%1100.00%






void cpqhp_create_debugfs_files(struct controller *ctrl)
{
	ctrl->dentry = debugfs_create_file(dev_name(&ctrl->pci_dev->dev),
					   S_IRUGO, root, ctrl, &debug_ops);
}


Contributors
PersonTokensPropCommitsCommitProp
greg kroah-hartmangreg kroah-hartman1952.78%250.00%


linus torvaldslinus torvalds1336.11%125.00%


kay sieverskay sievers411.11%125.00%


Total36100.00%4100.00%






void cpqhp_remove_debugfs_files(struct controller *ctrl)
{
	debugfs_remove(ctrl->dentry);
	ctrl->dentry = NULL;
}


Contributors
PersonTokensPropCommitsCommitProp
greg kroah-hartmangreg kroah-hartman1982.61%150.00%


linus torvaldslinus torvalds417.39%150.00%


Total23100.00%2100.00%




Overall Contributors
PersonTokensPropCommitsCommitProp
linus torvaldslinus torvalds54152.63%16.25%


greg kroah-hartmangreg kroah-hartman44543.29%637.50%


arnd bergmannarnd bergmann181.75%16.25%


al viroal viro80.78%16.25%


kay sieverskay sievers40.39%16.25%


yani ioannouyani ioannou40.39%16.25%


tejun heotejun heo30.29%16.25%


alexey dobriyanalexey dobriyan20.19%16.25%


theodore tsotheodore tso10.10%16.25%


ingo molnaringo molnar10.10%16.25%


arjan van de venarjan van de ven10.10%16.25%


Total1028100.00%16100.00%

  
Directory: drivers/pci/hotplug



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