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/*
* I2O Configuration Interface Driver
*
* (C) Copyright 1999 Red Hat Software
*
* Written by Alan Cox, Building Number Three Ltd
*
* Modified 04/20/1999 by Deepak Saxena
* - Added basic ioctl() support
* Modified 06/07/1999 by Deepak Saxena
* - Added software download ioctl (still testing)
* Modified 09/10/1999 by Auvo Häkkinen
* - Changes to i2o_cfg_reply(), ioctl_parms()
* - Added ioct_validate()
* Modified 09/30/1999 by Taneli Vähäkangas
* - Fixed ioctl_swdl()
* Modified 10/04/1999 by Taneli Vähäkangas
* - Changed ioctl_swdl(), implemented ioctl_swul() and ioctl_swdel()
* Modified 11/18/199 by Deepak Saxena
* - Added event managmenet support
*
* 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/module.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/i2o.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/miscdevice.h>
#include <linux/mm.h>
#include <linux/spinlock.h>
#include <linux/smp_lock.h>
#include <asm/uaccess.h>
#include <asm/io.h>
static int i2o_cfg_context = -1;
static void *page_buf;
static spinlock_t i2o_config_lock = SPIN_LOCK_UNLOCKED;
struct wait_queue *i2o_wait_queue;
#define MODINC(x,y) ((x) = ((x) + 1) % (y))
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
u32 q_id; // Event queue ID...used as tx_context
struct i2o_cfg_info *next;
};
static struct i2o_cfg_info *open_files = NULL;
static int i2o_cfg_info_id = 0;
static int ioctl_getiops(unsigned long);
static int ioctl_gethrt(unsigned long);
static int ioctl_getlct(unsigned long);
static int ioctl_parms(unsigned long, unsigned int);
static int ioctl_html(unsigned long);
static int ioctl_swdl(unsigned long);
static int ioctl_swul(unsigned long);
static int ioctl_swdel(unsigned long);
static int ioctl_validate(unsigned long);
static int ioctl_evt_reg(unsigned long, struct file *);
static int ioctl_evt_get(unsigned long, struct file *);
static int cfg_fasync(int, struct file*, int);
/*
* This is the callback for any message we have posted. The message itself
* will be returned to the message pool when we return from the IRQ
*
* This runs in irq context so be short and sweet.
*/
static void i2o_cfg_reply(struct i2o_handler *h, struct i2o_controller *c, struct i2o_message *m)
{
u32 *msg = (u32 *)m;
if (msg[0] & MSG_FAIL) {
u32 *preserved_msg = (u32*)(c->mem_offset + msg[7]);
printk(KERN_ERR "i2o_config: IOP failed to process the msg.\n");
/* Release the preserved msg frame by resubmitting it as a NOP */
preserved_msg[0] = THREE_WORD_MSG_SIZE | SGL_OFFSET_0;
preserved_msg[1] = I2O_CMD_UTIL_NOP << 24 | HOST_TID << 12 | 0;
preserved_msg[2] = 0;
i2o_post_message(c, msg[7]);
}
if (msg[4] >> 24) // ReqStatus != SUCCESS
i2o_report_status(KERN_INFO,"i2o_config", msg);
if(m->function == I2O_CMD_UTIL_EVT_REGISTER)
{
struct i2o_cfg_info *inf;
for(inf = open_files; inf; inf = inf->next)
if(inf->q_id == msg[3])
break;
//
// If this is the case, it means that we're getting
// events for a file descriptor that's been close()'d
// w/o the user unregistering for events first.
// The code currently assumes that the user will
// take care of unregistering for events before closing
// a file.
//
// TODO:
// Should we track event registartion and deregister
// for events when a file is close()'d so this doesn't
// happen? That would get rid of the search through
// the linked list since file->private_data could point
// directly to the i2o_config_info data structure...but
// it would mean having all sorts of tables to track
// what each file is registered for...I think the
// current method is simpler. - DS
//
if(!inf)
return;
inf->event_q[inf->q_in].id.iop = c->unit;
inf->event_q[inf->q_in].id.tid = m->target_tid;
inf->event_q[inf->q_in].id.evt_mask = msg[4];
//
// Data size = msg size - reply header
//
inf->event_q[inf->q_in].data_size = (m->size - 5) * 4;
if(inf->event_q[inf->q_in].data_size)
memcpy(inf->event_q[inf->q_in].evt_data,
(unsigned char *)(msg + 5),
inf->event_q[inf->q_in].data_size);
spin_lock(&i2o_config_lock);
MODINC(inf->q_in, I2O_EVT_Q_LEN);
if(inf->q_len == I2O_EVT_Q_LEN)
{
MODINC(inf->q_out, I2O_EVT_Q_LEN);
inf->q_lost++;
}
else
{
// Keep I2OEVTGET on another CPU from touching this
inf->q_len++;
}
spin_unlock(&i2o_config_lock);
// printk(KERN_INFO "File %p w/id %d has %d events\n",
// inf->fp, inf->q_id, inf->q_len);
kill_fasync(&inf->fasync, SIGIO, POLL_IN);
}
return;
}
/*
* Each of these describes an i2o message handler. They are
* multiplexed by the i2o_core code
*/
struct i2o_handler cfg_handler=
{
i2o_cfg_reply,
NULL,
NULL,
NULL,
"Configuration",
0,
0xffffffff // All classes
};
static ssize_t cfg_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
{
printk(KERN_INFO "i2o_config write not yet supported\n");
return 0;
}
static ssize_t cfg_read(struct file *file, char *buf, size_t count, loff_t *ptr)
{
return 0;
}
/*
* IOCTL Handler
*/
static int cfg_ioctl(struct inode *inode, struct file *fp, unsigned int cmd,
unsigned long arg)
{
int ret;
switch(cmd)
{
case I2OGETIOPS:
ret = ioctl_getiops(arg);
break;
case I2OHRTGET:
ret = ioctl_gethrt(arg);
break;
case I2OLCTGET:
ret = ioctl_getlct(arg);
break;
case I2OPARMSET:
ret = ioctl_parms(arg, I2OPARMSET);
break;
case I2OPARMGET:
ret = ioctl_parms(arg, I2OPARMGET);
break;
case I2OSWDL:
ret = ioctl_swdl(arg);
break;
case I2OSWUL:
ret = ioctl_swul(arg);
break;
case I2OSWDEL:
ret = ioctl_swdel(arg);
break;
case I2OVALIDATE:
ret = ioctl_validate(arg);
break;
case I2OHTML:
ret = ioctl_html(arg);
break;
case I2OEVTREG:
ret = ioctl_evt_reg(arg, fp);
break;
case I2OEVTGET:
ret = ioctl_evt_get(arg, fp);
break;
default:
ret = -EINVAL;
}
return ret;
}
int ioctl_getiops(unsigned long arg)
{
u8 *user_iop_table = (u8*)arg;
struct i2o_controller *c = NULL;
int i;
u8 foo[MAX_I2O_CONTROLLERS];
if(!access_ok(VERIFY_WRITE, user_iop_table, MAX_I2O_CONTROLLERS))
return -EFAULT;
for(i = 0; i < MAX_I2O_CONTROLLERS; i++)
{
c = i2o_find_controller(i);
if(c)
{
foo[i] = 1;
i2o_unlock_controller(c);
}
else
{
foo[i] = 0;
}
}
__copy_to_user(user_iop_table, foo, MAX_I2O_CONTROLLERS);
return 0;
}
int ioctl_gethrt(unsigned long arg)
{
struct i2o_controller *c;
struct i2o_cmd_hrtlct *cmd = (struct i2o_cmd_hrtlct*)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_controller(kcmd.iop);
if(!c)
return -ENXIO;
hrt = (i2o_hrt *)c->hrt;
i2o_unlock_controller(c);
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;
}
int ioctl_getlct(unsigned long arg)
{
struct i2o_controller *c;
struct i2o_cmd_hrtlct *cmd = (struct i2o_cmd_hrtlct*)arg;
struct i2o_cmd_hrtlct kcmd;
i2o_lct *lct;
int len;
int ret = 0;
u32 reslen;
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_controller(kcmd.iop);
if(!c)
return -ENXIO;
lct = (i2o_lct *)c->lct;
i2o_unlock_controller(c);
len = (unsigned int)lct->table_size << 2;
put_user(len, kcmd.reslen);
if(len > reslen)
ret = -ENOBUFS;
else if(copy_to_user(kcmd.resbuf, (void*)lct, len))
ret = -EFAULT;
return ret;
}
static int ioctl_parms(unsigned long arg, unsigned int type)
{
int ret = 0;
struct i2o_controller *c;
struct i2o_cmd_psetget *cmd = (struct i2o_cmd_psetget*)arg;
struct i2o_cmd_psetget kcmd;
u32 reslen;
u8 *ops;
u8 *res;
int len;
u32 i2o_cmd = (type == I2OPARMGET ?
I2O_CMD_UTIL_PARAMS_GET :
I2O_CMD_UTIL_PARAMS_SET);
if(copy_from_user(&kcmd, cmd, sizeof(struct i2o_cmd_psetget)))
return -EFAULT;
if(get_user(reslen, kcmd.reslen))
return -EFAULT;
c = i2o_find_controller(kcmd.iop);
if(!c)
return -ENXIO;
ops = (u8*)kmalloc(kcmd.oplen, GFP_KERNEL);
if(!ops)
{
i2o_unlock_controller(c);
return -ENOMEM;
}
if(copy_from_user(ops, kcmd.opbuf, kcmd.oplen))
{
i2o_unlock_controller(c);
kfree(ops);
return -EFAULT;
}
/*
* It's possible to have a _very_ large table
* and that the user asks for all of it at once...
*/
res = (u8*)kmalloc(65536, GFP_KERNEL);
if(!res)
{
i2o_unlock_controller(c);
kfree(ops);
return -ENOMEM;
}
len = i2o_issue_params(i2o_cmd, c, kcmd.tid,
ops, kcmd.oplen, res, 65536);
i2o_unlock_controller(c);
kfree(ops);
if (len < 0) {
kfree(res);
return -EAGAIN;
}
put_user(len, kcmd.reslen);
if(len > reslen)
ret = -ENOBUFS;
else if(copy_to_user(cmd->resbuf, res, len))
ret = -EFAULT;
kfree(res);
return ret;
}
int ioctl_html(unsigned long arg)
{
struct i2o_html *cmd = (struct i2o_html*)arg;
struct i2o_html kcmd;
struct i2o_controller *c;
u8 *res = NULL;
void *query = NULL;
int ret = 0;
int token;
u32 len;
u32 reslen;
u32 msg[MSG_FRAME_SIZE/4];
if(copy_from_user(&kcmd, cmd, sizeof(struct i2o_html)))
{
printk(KERN_INFO "i2o_config: can't copy html cmd\n");
return -EFAULT;
}
if(get_user(reslen, kcmd.reslen) < 0)
{
printk(KERN_INFO "i2o_config: can't copy html reslen\n");
return -EFAULT;
}
if(!kcmd.resbuf)
{
printk(KERN_INFO "i2o_config: NULL html buffer\n");
return -EFAULT;
}
c = i2o_find_controller(kcmd.iop);
if(!c)
return -ENXIO;
if(kcmd.qlen) /* Check for post data */
{
query = kmalloc(kcmd.qlen, GFP_KERNEL);
if(!query)
{
i2o_unlock_controller(c);
return -ENOMEM;
}
if(copy_from_user(query, kcmd.qbuf, kcmd.qlen))
{
i2o_unlock_controller(c);
printk(KERN_INFO "i2o_config: could not get query\n");
kfree(query);
return -EFAULT;
}
}
res = kmalloc(65536, GFP_KERNEL);
if(!res)
{
i2o_unlock_controller(c);
kfree(query);
return -ENOMEM;
}
msg[1] = (I2O_CMD_UTIL_CONFIG_DIALOG << 24)|HOST_TID<<12|kcmd.tid;
msg[2] = i2o_cfg_context;
msg[3] = 0;
msg[4] = kcmd.page;
msg[5] = 0xD0000000|65536;
msg[6] = virt_to_bus(res);
if(!kcmd.qlen) /* Check for post data */
msg[0] = SEVEN_WORD_MSG_SIZE|SGL_OFFSET_5;
else
{
msg[0] = NINE_WORD_MSG_SIZE|SGL_OFFSET_5;
msg[5] = 0x50000000|65536;
msg[7] = 0xD4000000|(kcmd.qlen);
msg[8] = virt_to_bus(query);
}
/*
Wait for a considerable time till the Controller
does its job before timing out. The controller might
take more time to process this request if there are
many devices connected to it.
*/
token = i2o_post_wait_mem(c, msg, 9*4, 400, query, res);
if(token < 0)
{
printk(KERN_DEBUG "token = %#10x\n", token);
i2o_unlock_controller(c);
if(token != -ETIMEDOUT)
{
kfree(res);
if(kcmd.qlen) kfree(query);
}
return token;
}
i2o_unlock_controller(c);
len = strnlen(res, 65536);
put_user(len, kcmd.reslen);
if(len > reslen)
ret = -ENOMEM;
if(copy_to_user(kcmd.resbuf, res, len))
ret = -EFAULT;
kfree(res);
if(kcmd.qlen)
kfree(query);
return ret;
}
int ioctl_swdl(unsigned long arg)
{
struct i2o_sw_xfer kxfer;
struct i2o_sw_xfer *pxfer = (struct i2o_sw_xfer *)arg;
unsigned char maxfrag = 0, curfrag = 1;
unsigned char *buffer;
u32 msg[9];
unsigned int status = 0, swlen = 0, fragsize = 8192;
struct i2o_controller *c;
if(copy_from_user(&kxfer, pxfer, sizeof(struct i2o_sw_xfer)))
return -EFAULT;
if(get_user(swlen, kxfer.swlen) < 0)
return -EFAULT;
if(get_user(maxfrag, kxfer.maxfrag) < 0)
return -EFAULT;
if(get_user(curfrag, kxfer.curfrag) < 0)
return -EFAULT;
if(curfrag==maxfrag) fragsize = swlen-(maxfrag-1)*8192;
if(!kxfer.buf || !access_ok(VERIFY_READ, kxfer.buf, fragsize))
return -EFAULT;
c = i2o_find_controller(kxfer.iop);
if(!c)
return -ENXIO;
buffer=kmalloc(fragsize, GFP_KERNEL);
if (buffer==NULL)
{
i2o_unlock_controller(c);
return -ENOMEM;
}
__copy_from_user(buffer, kxfer.buf, fragsize);
msg[0]= NINE_WORD_MSG_SIZE | SGL_OFFSET_7;
msg[1]= I2O_CMD_SW_DOWNLOAD<<24 | HOST_TID<<12 | ADAPTER_TID;
msg[2]= (u32)cfg_handler.context;
msg[3]= 0;
msg[4]= (((u32)kxfer.flags)<<24) | (((u32)kxfer.sw_type)<<16) |
(((u32)maxfrag)<<8) | (((u32)curfrag));
msg[5]= swlen;
msg[6]= kxfer.sw_id;
msg[7]= (0xD0000000 | fragsize);
msg[8]= virt_to_bus(buffer);
// printk("i2o_config: swdl frag %d/%d (size %d)\n", curfrag, maxfrag, fragsize);
status = i2o_post_wait_mem(c, msg, sizeof(msg), 60, buffer, NULL);
i2o_unlock_controller(c);
if(status != -ETIMEDOUT)
kfree(buffer);
if (status != I2O_POST_WAIT_OK)
{
// it fails if you try and send frags out of order
// and for some yet unknown reasons too
printk(KERN_INFO "i2o_config: swdl failed, DetailedStatus = %d\n", status);
return status;
}
return 0;
}
int ioctl_swul(unsigned long arg)
{
struct i2o_sw_xfer kxfer;
struct i2o_sw_xfer *pxfer = (struct i2o_sw_xfer *)arg;
unsigned char maxfrag = 0, curfrag = 1;
unsigned char *buffer;
u32 msg[9];
unsigned int status = 0, swlen = 0, fragsize = 8192;
struct i2o_controller *c;
if(copy_from_user(&kxfer, pxfer, sizeof(struct i2o_sw_xfer)))
return -EFAULT;
if(get_user(swlen, kxfer.swlen) < 0)
return -EFAULT;
if(get_user(maxfrag, kxfer.maxfrag) < 0)
return -EFAULT;
if(get_user(curfrag, kxfer.curfrag) < 0)
return -EFAULT;
if(curfrag==maxfrag) fragsize = swlen-(maxfrag-1)*8192;
if(!kxfer.buf || !access_ok(VERIFY_WRITE, kxfer.buf, fragsize))
return -EFAULT;
c = i2o_find_controller(kxfer.iop);
if(!c)
return -ENXIO;
buffer=kmalloc(fragsize, GFP_KERNEL);
if (buffer==NULL)
{
i2o_unlock_controller(c);
return -ENOMEM;
}
msg[0]= NINE_WORD_MSG_SIZE | SGL_OFFSET_7;
msg[1]= I2O_CMD_SW_UPLOAD<<24 | HOST_TID<<12 | ADAPTER_TID;
msg[2]= (u32)cfg_handler.context;
msg[3]= 0;
msg[4]= (u32)kxfer.flags<<24|(u32)kxfer.sw_type<<16|(u32)maxfrag<<8|(u32)curfrag;
msg[5]= swlen;
msg[6]= kxfer.sw_id;
msg[7]= (0xD0000000 | fragsize);
msg[8]= virt_to_bus(buffer);
// printk("i2o_config: swul frag %d/%d (size %d)\n", curfrag, maxfrag, fragsize);
status = i2o_post_wait_mem(c, msg, sizeof(msg), 60, buffer, NULL);
i2o_unlock_controller(c);
if (status != I2O_POST_WAIT_OK)
{
if(status != -ETIMEDOUT)
kfree(buffer);
printk(KERN_INFO "i2o_config: swul failed, DetailedStatus = %d\n", status);
return status;
}
__copy_to_user(kxfer.buf, buffer, fragsize);
kfree(buffer);
return 0;
}
int ioctl_swdel(unsigned long arg)
{
struct i2o_controller *c;
struct i2o_sw_xfer kxfer, *pxfer = (struct i2o_sw_xfer *)arg;
u32 msg[7];
unsigned int swlen;
int token;
if (copy_from_user(&kxfer, pxfer, sizeof(struct i2o_sw_xfer)))
return -EFAULT;
if (get_user(swlen, kxfer.swlen) < 0)
return -EFAULT;
c = i2o_find_controller(kxfer.iop);
if (!c)
return -ENXIO;
msg[0] = SEVEN_WORD_MSG_SIZE | SGL_OFFSET_0;
msg[1] = I2O_CMD_SW_REMOVE<<24 | HOST_TID<<12 | ADAPTER_TID;
msg[2] = (u32)i2o_cfg_context;
msg[3] = 0;
msg[4] = (u32)kxfer.flags<<24 | (u32)kxfer.sw_type<<16;
msg[5] = swlen;
msg[6] = kxfer.sw_id;
token = i2o_post_wait(c, msg, sizeof(msg), 10);
i2o_unlock_controller(c);
if (token != I2O_POST_WAIT_OK)
{
printk(KERN_INFO "i2o_config: swdel failed, DetailedStatus = %d\n", token);
return -ETIMEDOUT;
}
return 0;
}
int ioctl_validate(unsigned long arg)
{
int token;
int iop = (int)arg;
u32 msg[4];
struct i2o_controller *c;
c=i2o_find_controller(iop);
if (!c)
return -ENXIO;
msg[0] = FOUR_WORD_MSG_SIZE|SGL_OFFSET_0;
msg[1] = I2O_CMD_CONFIG_VALIDATE<<24 | HOST_TID<<12 | iop;
msg[2] = (u32)i2o_cfg_context;
msg[3] = 0;
token = i2o_post_wait(c, msg, sizeof(msg), 10);
i2o_unlock_controller(c);
if (token != I2O_POST_WAIT_OK)
{
printk(KERN_INFO "Can't validate configuration, ErrorStatus = %d\n",
token);
return -ETIMEDOUT;
}
return 0;
}
static int ioctl_evt_reg(unsigned long arg, struct file *fp)
{
u32 msg[5];
struct i2o_evt_id *pdesc = (struct i2o_evt_id *)arg;
struct i2o_evt_id kdesc;
struct i2o_controller *iop;
struct i2o_device *d;
if (copy_from_user(&kdesc, pdesc, sizeof(struct i2o_evt_id)))
return -EFAULT;
/* IOP exists? */
iop = i2o_find_controller(kdesc.iop);
if(!iop)
return -ENXIO;
i2o_unlock_controller(iop);
/* Device exists? */
for(d = iop->devices; d; d = d->next)
if(d->lct_data.tid == kdesc.tid)
break;
if(!d)
return -ENODEV;
msg[0] = FOUR_WORD_MSG_SIZE|SGL_OFFSET_0;
msg[1] = I2O_CMD_UTIL_EVT_REGISTER<<24 | HOST_TID<<12 | kdesc.tid;
msg[2] = (u32)i2o_cfg_context;
msg[3] = (u32)fp->private_data;
msg[4] = kdesc.evt_mask;
i2o_post_this(iop, msg, 20);
return 0;
}
static int ioctl_evt_get(unsigned long arg, struct file *fp)
{
u32 id = (u32)fp->private_data;
struct i2o_cfg_info *p = NULL;
struct i2o_evt_get *uget = (struct i2o_evt_get*)arg;
struct i2o_evt_get kget;
unsigned long flags;
for(p = open_files; p; p = p->next)
if(p->q_id == id)
break;
if(!p->q_len)
{
return -ENOENT;
return 0;
}
memcpy(&kget.info, &p->event_q[p->q_out], sizeof(struct i2o_evt_info));
MODINC(p->q_out, I2O_EVT_Q_LEN);
spin_lock_irqsave(&i2o_config_lock, flags);
p->q_len--;
kget.pending = p->q_len;
kget.lost = p->q_lost;
spin_unlock_irqrestore(&i2o_config_lock, flags);
if(copy_to_user(uget, &kget, sizeof(struct i2o_evt_get)))
return -EFAULT;
return 0;
}
static int cfg_open(struct inode *inode, struct file *file)
{
struct i2o_cfg_info *tmp =
(struct i2o_cfg_info *)kmalloc(sizeof(struct i2o_cfg_info), GFP_KERNEL);
unsigned long flags;
if(!tmp)
return -ENOMEM;
file->private_data = (void*)(i2o_cfg_info_id++);
tmp->fp = file;
tmp->fasync = NULL;
tmp->q_id = (u32)file->private_data;
tmp->q_len = 0;
tmp->q_in = 0;
tmp->q_out = 0;
tmp->q_lost = 0;
tmp->next = open_files;
spin_lock_irqsave(&i2o_config_lock, flags);
open_files = tmp;
spin_unlock_irqrestore(&i2o_config_lock, flags);
return 0;
}
static int cfg_release(struct inode *inode, struct file *file)
{
u32 id = (u32)file->private_data;
struct i2o_cfg_info *p1, *p2;
unsigned long flags;
lock_kernel();
p1 = p2 = NULL;
spin_lock_irqsave(&i2o_config_lock, flags);
for(p1 = open_files; p1; )
{
if(p1->q_id == id)
{
if(p1->fasync)
cfg_fasync(-1, file, 0);
if(p2)
p2->next = p1->next;
else
open_files = p1->next;
kfree(p1);
break;
}
p2 = p1;
p1 = p1->next;
}
spin_unlock_irqrestore(&i2o_config_lock, flags);
unlock_kernel();
return 0;
}
static int cfg_fasync(int fd, struct file *fp, int on)
{
u32 id = (u32)fp->private_data;
struct i2o_cfg_info *p;
for(p = open_files; p; p = p->next)
if(p->q_id == id)
break;
if(!p)
return -EBADF;
return fasync_helper(fd, fp, on, &p->fasync);
}
static struct file_operations config_fops =
{
owner: THIS_MODULE,
llseek: no_llseek,
read: cfg_read,
write: cfg_write,
ioctl: cfg_ioctl,
open: cfg_open,
release: cfg_release,
fasync: cfg_fasync,
};
static struct miscdevice i2o_miscdev = {
I2O_MINOR,
"i2octl",
&config_fops
};
#ifdef MODULE
int init_module(void)
#else
int __init i2o_config_init(void)
#endif
{
printk(KERN_INFO "I2O configuration manager v 0.04.\n");
printk(KERN_INFO " (C) Copyright 1999 Red Hat Software\n");
if((page_buf = kmalloc(4096, GFP_KERNEL))==NULL)
{
printk(KERN_ERR "i2o_config: no memory for page buffer.\n");
return -ENOBUFS;
}
if(misc_register(&i2o_miscdev)==-1)
{
printk(KERN_ERR "i2o_config: can't register device.\n");
kfree(page_buf);
return -EBUSY;
}
/*
* Install our handler
*/
if(i2o_install_handler(&cfg_handler)<0)
{
kfree(page_buf);
printk(KERN_ERR "i2o_config: handler register failed.\n");
misc_deregister(&i2o_miscdev);
return -EBUSY;
}
/*
* The low 16bits of the transaction context must match this
* for everything we post. Otherwise someone else gets our mail
*/
i2o_cfg_context = cfg_handler.context;
return 0;
}
#ifdef MODULE
void cleanup_module(void)
{
misc_deregister(&i2o_miscdev);
if(page_buf)
kfree(page_buf);
if(i2o_cfg_context != -1)
i2o_remove_handler(&cfg_handler);
}
EXPORT_NO_SYMBOLS;
MODULE_AUTHOR("Red Hat Software");
MODULE_DESCRIPTION("I2O Configuration");
MODULE_LICENSE("GPL");
#endif
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