[net-next-2.6.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/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/smp_lock.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(dev_name(&ctrl->pci_dev->dev),
					   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>
1da177e4 LT	30	#include <linux/kernel.h>
5a0e3ad6	31	#include <linux/slab.h>
1da177e4 LT	32	#include <linux/types.h>
	33	#include <linux/proc_fs.h>
	34	#include <linux/workqueue.h>
	35	#include <linux/pci.h>
7a54f25c	36	#include <linux/pci_hotplug.h>
405f5571	37	#include <linux/smp_lock.h>
9f3f4681	38	#include <linux/debugfs.h>
1da177e4 LT	39	#include "cpqphp.h"
1da177e4 LT	40
9f3f4681	41	static int show_ctrl (struct controller ctrl, char buf)
1da177e4	42	{
9f3f4681	43	char *out = buf;
1da177e4 LT	44	int index;
	45	struct pci_resource *res;
	46
1da177e4 LT	47	out += sprintf(buf, "Free resources: memory\n");
	48	index = 11;
	49	res = ctrl->mem_head;
	50	while (res && index--) {
	51	out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
	52	res = res->next;
	53	}
	54	out += sprintf(out, "Free resources: prefetchable memory\n");
	55	index = 11;
	56	res = ctrl->p_mem_head;
	57	while (res && index--) {
	58	out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
	59	res = res->next;
	60	}
	61	out += sprintf(out, "Free resources: IO\n");
	62	index = 11;
	63	res = ctrl->io_head;
	64	while (res && index--) {
	65	out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
	66	res = res->next;
	67	}
	68	out += sprintf(out, "Free resources: bus numbers\n");
	69	index = 11;
	70	res = ctrl->bus_head;
	71	while (res && index--) {
	72	out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
	73	res = res->next;
	74	}
	75
	76	return out - buf;
	77	}
1da177e4	78
9f3f4681	79	static int show_dev (struct controller ctrl, char buf)
1da177e4	80	{
1da177e4 LT	81	char * out = buf;
	82	int index;
	83	struct pci_resource *res;
	84	struct pci_func *new_slot;
	85	struct slot *slot;
	86
9f3f4681	87	slot = ctrl->slot;
1da177e4 LT	88
	89	while (slot) {
	90	new_slot = cpqhp_slot_find(slot->bus, slot->device, 0);
	91	if (!new_slot)
	92	break;
	93	out += sprintf(out, "assigned resources: memory\n");
	94	index = 11;
	95	res = new_slot->mem_head;
	96	while (res && index--) {
	97	out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
	98	res = res->next;
	99	}
	100	out += sprintf(out, "assigned resources: prefetchable memory\n");
	101	index = 11;
	102	res = new_slot->p_mem_head;
	103	while (res && index--) {
	104	out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
	105	res = res->next;
	106	}
	107	out += sprintf(out, "assigned resources: IO\n");
	108	index = 11;
	109	res = new_slot->io_head;
	110	while (res && index--) {
	111	out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
	112	res = res->next;
	113	}
	114	out += sprintf(out, "assigned resources: bus numbers\n");
	115	index = 11;
	116	res = new_slot->bus_head;
	117	while (res && index--) {
	118	out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
	119	res = res->next;
	120	}
	121	slot=slot->next;
	122	}
	123
	124	return out - buf;
	125	}
1da177e4	126
9f3f4681	127	static int spew_debug_info(struct controller ctrl, char data, int size)
1da177e4	128	{
9f3f4681 GKH	129	int used;
	130
	131	used = size - show_ctrl(ctrl, data);
	132	used = (size - used) - show_dev(ctrl, &data[used]);
	133	return used;
	134	}
	135
	136	struct ctrl_dbg {
	137	int size;
	138	char *data;
	139	struct controller *ctrl;
	140	};
	141
	142	#define MAX_OUTPUT (4*PAGE_SIZE)
	143
	144	static int open(struct inode inode, struct file file)
	145	{
8e18e294	146	struct controller *ctrl = inode->i_private;
9f3f4681 GKH	147	struct ctrl_dbg *dbg;
	148	int retval = -ENOMEM;
	149
	150	lock_kernel();
	151	dbg = kmalloc(sizeof(*dbg), GFP_KERNEL);
	152	if (!dbg)
	153	goto exit;
	154	dbg->data = kmalloc(MAX_OUTPUT, GFP_KERNEL);
	155	if (!dbg->data) {
	156	kfree(dbg);
	157	goto exit;
	158	}
	159	dbg->size = spew_debug_info(ctrl, dbg->data, MAX_OUTPUT);
	160	file->private_data = dbg;
	161	retval = 0;
	162	exit:
	163	unlock_kernel();
	164	return retval;
	165	}
	166
	167	static loff_t lseek(struct file *file, loff_t off, int whence)
	168	{
	169	struct ctrl_dbg *dbg;
	170	loff_t new = -1;
	171
	172	lock_kernel();
	173	dbg = file->private_data;
	174
	175	switch (whence) {
	176	case 0:
	177	new = off;
	178	break;
	179	case 1:
	180	new = file->f_pos + off;
	181	break;
	182	}
	183	if (new < 0 \|\| new > dbg->size) {
	184	unlock_kernel();
	185	return -EINVAL;
	186	}
	187	unlock_kernel();
	188	return (file->f_pos = new);
1da177e4	189	}
9f3f4681 GKH	190
	191	static ssize_t read(struct file file, char __user buf,
	192	size_t nbytes, loff_t *ppos)
	193	{
	194	struct ctrl_dbg *dbg = file->private_data;
	195	return simple_read_from_buffer(buf, nbytes, ppos, dbg->data, dbg->size);
	196	}
	197
	198	static int release(struct inode inode, struct file file)
	199	{
	200	struct ctrl_dbg *dbg = file->private_data;
	201
	202	kfree(dbg->data);
	203	kfree(dbg);
	204	return 0;
	205	}
	206
d54b1fdb	207	static const struct file_operations debug_ops = {
9f3f4681 GKH	208	.owner = THIS_MODULE,
	209	.open = open,
	210	.llseek = lseek,
	211	.read = read,
	212	.release = release,
	213	};
	214
	215	static struct dentry *root;
	216
	217	void cpqhp_initialize_debugfs(void)
	218	{
	219	if (!root)
	220	root = debugfs_create_dir("cpqhp", NULL);
	221	}
	222
	223	void cpqhp_shutdown_debugfs(void)
	224	{
	225	debugfs_remove(root);
	226	}
	227
	228	void cpqhp_create_debugfs_files(struct controller *ctrl)
	229	{
54cc6954 KS	230	ctrl->dentry = debugfs_create_file(dev_name(&ctrl->pci_dev->dev),
54cc6954 KS	231	S_IRUGO, root, ctrl, &debug_ops);
9f3f4681 GKH	232	}
	233
	234	void cpqhp_remove_debugfs_files(struct controller *ctrl)
	235	{
	236	if (ctrl->dentry)
	237	debugfs_remove(ctrl->dentry);
	238	ctrl->dentry = NULL;
	239	}
	240