path: root/drivers/message/i2o/i2o_config.c

/*
 * I2O Configuration Interface Driver
 *
 * (C) Copyright 1999-2002  Red Hat
 *
 * Written by Alan Cox, Building Number Three Ltd
 *
 * Fixes/additions:
 *	Deepak Saxena (04/20/1999):
 *		Added basic ioctl() support
 *	Deepak Saxena (06/07/1999):
 *		Added software download ioctl (still testing)
 *	Auvo H�kkinen (09/10/1999):
 *		Changes to i2o_cfg_reply(), ioctl_parms()
 *		Added ioct_validate()
 *	Taneli V�h�kangas (09/30/1999):
 *		Fixed ioctl_swdl()
 *	Taneli V�h�kangas (10/04/1999):
 *		Changed ioctl_swdl(), implemented ioctl_swul() and ioctl_swdel()
 *	Deepak Saxena (11/18/1999):
 *		Added event managmenet support
 *	Alan Cox <alan@redhat.com>:
 *		2.4 rewrite ported to 2.5
 *	Markus Lidel <Markus.Lidel@shadowconnect.com>:
 *		Added pass-thru support for Adaptec's raidutils
 *
 * 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.
 */

#include <linux/miscdevice.h>
#include <linux/smp_lock.h>
#include <linux/compat.h>

#include <asm/uaccess.h>

#include "core.h"

#define SG_TABLESIZE		30

static int i2o_cfg_ioctl(struct inode *, struct file *, unsigned int,
			 unsigned long);

static spinlock_t i2o_config_lock;

#define MODINC(x,y) ((x) = ((x) + 1) % (y))

struct sg_simple_element {
	u32 flag_count;
	u32 addr_bus;
};

struct i2o_cfg_info {
	struct file *fp;
	struct fasync_struct *fasync;
	struct i2o_evt_info event_q[I2O_EVT_Q_LEN];
	u16 q_in;		// Queue head index
	u16 q_out;		// Queue tail index
	u16 q_len;		// Queue length
	u16 q_lost;		// Number of lost events
	ulong q_id;		// Event queue ID...used as tx_context
	struct i2o_cfg_info *next;
};
static struct i2o_cfg_info *open_files = NULL;
static ulong i2o_cfg_info_id = 0;

static int i2o_cfg_getiops(unsigned long arg)
{
	struct i2o_controller *c;
	u8 __user *user_iop_table = (void __user *)arg;
	u8 tmp[MAX_I2O_CONTROLLERS];
	int ret = 0;

	memset(tmp, 0, MAX_I2O_CONTROLLERS);

	list_for_each_entry(c, &i2o_controllers, list)
	    tmp[c->unit] = 1;

	if (copy_to_user(user_iop_table, tmp, MAX_I2O_CONTROLLERS))
		ret = -EFAULT;

	return ret;
};

static int i2o_cfg_gethrt(unsigned long arg)
{
	struct i2o_controller *c;
	struct i2o_cmd_hrtlct __user *cmd = (struct i2o_cmd_hrtlct __user *)arg;
	struct i2o_cmd_hrtlct kcmd;
	i2o_hrt *hrt;
	int len;
	u32 reslen;
	int ret = 0;

	if (copy_from_user(&kcmd, cmd, sizeof(struct i2o_cmd_hrtlct)))
		return -EFAULT;

	if (get_user(reslen, kcmd.reslen) < 0)
		return -EFAULT;

	if (kcmd.resbuf == NULL)
		return -EFAULT;

	c = i2o_find_iop(kcmd.iop);
	if (!c)
		return -ENXIO;

	hrt = (i2o_hrt *) c->hrt.virt;

	len = 8 + ((hrt->entry_len * hrt->num_entries) << 2);

	/* We did a get user...so assuming mem is ok...is this bad? */
	put_user(len, kcmd.reslen);
	if (len > reslen)
		ret = -ENOBUFS;
	if (copy_to_user(kcmd.resbuf, (void *)hrt, len))
		ret = -EFAULT;

	return ret;
};

static int i2o_cfg_getlct(unsigned long arg)
{
	struct i2o_controller *c;
	struct i2o_cmd_hrtlct __user