[mirror_ubuntu-bionic-kernel.git] / drivers / pci / hotplug / cpqphp_sysfs.c

/*
 * 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/types.h>
#include <linux/proc_fs.h>
#include <linux/workqueue.h>
#include <linux/pci.h>
#include <linux/pci_hotplug.h>
#include <linux/debugfs.h>
#include "cpqphp.h"

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;
	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;

	lock_kernel();
	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:
	unlock_kernel();
	return retval;
}

static loff_t lseek(struct file *file, loff_t off, int whence)
{
	struct ctrl_dbg *dbg;
	loff_t new = -1;

	lock_kernel();
	dbg = file->private_data;

	switch (whence) {
	case 0:
		new = off;
		break;
	case 1:
		new = file->f_pos + off;
		break;
	}
	if (new < 0 || new > dbg->size) {
		unlock_kernel();
		return -EINVAL;
	}
	unlock_kernel();
	return (file->f_pos = new);
}

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(ctrl->pci_dev->dev.bus_id, S_IRUGO, root, ctrl, &debug_ops);
}

void cpqhp_remove_debugfs_files(struct controller *ctrl)
{
	if (ctrl->dentry)
		debugfs_remove(ctrl->dentry);
	ctrl->dentry = NULL;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Compaq Hot Plug Controller Driver
	3	*
	4	* Copyright (C) 1995,2001 Compaq Computer Corporation
	5	* Copyright (C) 2001,2003 Greg Kroah-Hartman (greg@kroah.com)
	6	* Copyright (C) 2001 IBM Corp.
	7	*
	8	* All rights reserved.
	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License as published by
	12	* the Free Software Foundation; either version 2 of the License, or (at
	13	* your option) any later version.
	14	*
	15	* This program is distributed in the hope that it will be useful, but
	16	* WITHOUT ANY WARRANTY; without even the implied warranty of
	17	* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
	18	* NON INFRINGEMENT. See the GNU General Public License for more
	19	* details.
	20	*
	21	* You should have received a copy of the GNU General Public License
	22	* along with this program; if not, write to the Free Software
	23	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	24	*
	25	* Send feedback to <greg@kroah.com>
	26	*
	27	*/
	28
1da177e4 LT	29	#include <linux/module.h>
	30	#include <linux/kernel.h>
	31	#include <linux/types.h>
	32	#include <linux/proc_fs.h>
	33	#include <linux/workqueue.h>
	34	#include <linux/pci.h>
7a54f25c	35	#include <linux/pci_hotplug.h>
9f3f4681	36	#include <linux/debugfs.h>
1da177e4 LT	37	#include "cpqphp.h"
1da177e4 LT	38
9f3f4681	39	static int show_ctrl (struct controller ctrl, char buf)
1da177e4	40	{
9f3f4681	41	char *out = buf;
1da177e4 LT	42	int index;
	43	struct pci_resource *res;
	44
1da177e4 LT	45	out += sprintf(buf, "Free resources: memory\n");
	46	index = 11;
	47	res = ctrl->mem_head;
	48	while (res && index--) {
	49	out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
	50	res = res->next;
	51	}
	52	out += sprintf(out, "Free resources: prefetchable memory\n");
	53	index = 11;
	54	res = ctrl->p_mem_head;
	55	while (res && index--) {
	56	out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
	57	res = res->next;
	58	}
	59	out += sprintf(out, "Free resources: IO\n");
	60	index = 11;
	61	res = ctrl->io_head;
	62	while (res && index--) {
	63	out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
	64	res = res->next;
	65	}
	66	out += sprintf(out, "Free resources: bus numbers\n");
	67	index = 11;
	68	res = ctrl->bus_head;
	69	while (res && index--) {
	70	out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
	71	res = res->next;
	72	}
	73
	74	return out - buf;
	75	}
1da177e4	76
9f3f4681	77	static int show_dev (struct controller ctrl, char buf)
1da177e4	78	{
1da177e4 LT	79	char * out = buf;
	80	int index;
	81	struct pci_resource *res;
	82	struct pci_func *new_slot;
	83	struct slot *slot;
	84
9f3f4681	85	slot = ctrl->slot;
1da177e4 LT	86
	87	while (slot) {
	88	new_slot = cpqhp_slot_find(slot->bus, slot->device, 0);
	89	if (!new_slot)
	90	break;
	91	out += sprintf(out, "assigned resources: memory\n");
	92	index = 11;
	93	res = new_slot->mem_head;
	94	while (res && index--) {
	95	out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
	96	res = res->next;
	97	}
	98	out += sprintf(out, "assigned resources: prefetchable memory\n");
	99	index = 11;
	100	res = new_slot->p_mem_head;
	101	while (res && index--) {
	102	out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
	103	res = res->next;
	104	}
	105	out += sprintf(out, "assigned resources: IO\n");
	106	index = 11;
	107	res = new_slot->io_head;
	108	while (res && index--) {
	109	out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
	110	res = res->next;
	111	}
	112	out += sprintf(out, "assigned resources: bus numbers\n");
	113	index = 11;
	114	res = new_slot->bus_head;
	115	while (res && index--) {
	116	out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
	117	res = res->next;
	118	}
	119	slot=slot->next;
	120	}
	121
	122	return out - buf;
	123	}
1da177e4	124
9f3f4681	125	static int spew_debug_info(struct controller ctrl, char data, int size)
1da177e4	126	{
9f3f4681 GKH	127	int used;
	128
	129	used = size - show_ctrl(ctrl, data);
	130	used = (size - used) - show_dev(ctrl, &data[used]);
	131	return used;
	132	}
	133
	134	struct ctrl_dbg {
	135	int size;
	136	char *data;
	137	struct controller *ctrl;
	138	};
	139
	140	#define MAX_OUTPUT (4*PAGE_SIZE)
	141
	142	static int open(struct inode inode, struct file file)
	143	{
8e18e294	144	struct controller *ctrl = inode->i_private;
9f3f4681 GKH	145	struct ctrl_dbg *dbg;
	146	int retval = -ENOMEM;
	147
	148	lock_kernel();
	149	dbg = kmalloc(sizeof(*dbg), GFP_KERNEL);
	150	if (!dbg)
	151	goto exit;
	152	dbg->data = kmalloc(MAX_OUTPUT, GFP_KERNEL);
	153	if (!dbg->data) {
	154	kfree(dbg);
	155	goto exit;
	156	}
	157	dbg->size = spew_debug_info(ctrl, dbg->data, MAX_OUTPUT);
	158	file->private_data = dbg;
	159	retval = 0;
	160	exit:
	161	unlock_kernel();
	162	return retval;
	163	}
	164
	165	static loff_t lseek(struct file *file, loff_t off, int whence)
	166	{
	167	struct ctrl_dbg *dbg;
	168	loff_t new = -1;
	169
	170	lock_kernel();
	171	dbg = file->private_data;
	172
	173	switch (whence) {
	174	case 0:
	175	new = off;
	176	break;
	177	case 1:
	178	new = file->f_pos + off;
	179	break;
	180	}
	181	if (new < 0 \|\| new > dbg->size) {
	182	unlock_kernel();
	183	return -EINVAL;
	184	}
	185	unlock_kernel();
	186	return (file->f_pos = new);
1da177e4	187	}
9f3f4681 GKH	188
	189	static ssize_t read(struct file file, char __user buf,
	190	size_t nbytes, loff_t *ppos)
	191	{
	192	struct ctrl_dbg *dbg = file->private_data;
	193	return simple_read_from_buffer(buf, nbytes, ppos, dbg->data, dbg->size);
	194	}
	195
	196	static int release(struct inode inode, struct file file)
	197	{
	198	struct ctrl_dbg *dbg = file->private_data;
	199
	200	kfree(dbg->data);
	201	kfree(dbg);
	202	return 0;
	203	}
	204
d54b1fdb	205	static const struct file_operations debug_ops = {
9f3f4681 GKH	206	.owner = THIS_MODULE,
	207	.open = open,
	208	.llseek = lseek,
	209	.read = read,
	210	.release = release,
	211	};
	212
	213	static struct dentry *root;
	214
	215	void cpqhp_initialize_debugfs(void)
	216	{
	217	if (!root)
	218	root = debugfs_create_dir("cpqhp", NULL);
	219	}
	220
	221	void cpqhp_shutdown_debugfs(void)
	222	{
	223	debugfs_remove(root);
	224	}
	225
	226	void cpqhp_create_debugfs_files(struct controller *ctrl)
	227	{
	228	ctrl->dentry = debugfs_create_file(ctrl->pci_dev->dev.bus_id, S_IRUGO, root, ctrl, &debug_ops);
	229	}
	230
	231	void cpqhp_remove_debugfs_files(struct controller *ctrl)
	232	{
	233	if (ctrl->dentry)
	234	debugfs_remove(ctrl->dentry);
	235	ctrl->dentry = NULL;
	236	}
	237