// SPDX-License-Identifier: GPL-2.0+/* * 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. * * 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;} 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;} 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;} struct ctrl_dbg {	int size;	char *data;}; #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_obj(*dbg);	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;} 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);} 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);} static int release(struct inode *inode, struct file *file){	struct ctrl_dbg *dbg = file->private_data; 	kfree(dbg->data);	kfree(dbg);	return 0;} 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);} void cpqhp_shutdown_debugfs(void){	debugfs_remove(root);} 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);} void cpqhp_remove_debugfs_files(struct controller *ctrl){	debugfs_remove(ctrl->dentry);	ctrl->dentry = NULL;}