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