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linux/drivers/isdn/hardware/eicon/divasproc.c
Arjan van de Ven 2b8693c061 [PATCH] mark struct file_operations const 3 
Many struct file_operations in the kernel can be "const".  Marking them const
moves these to the .rodata section, which avoids false sharing with potential
dirty data.  In addition it'll catch accidental writes at compile time to
these shared resources.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-12 09:48:45 -08:00

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/* $Id: divasproc.c,v 1.19.4.3 2005/01/31 12:22:20 armin Exp $
*
* Low level driver for Eicon DIVA Server ISDN cards.
* /proc functions
*
* Copyright 2000-2003 by Armin Schindler (mac@melware.de)
* Copyright 2000-2003 Cytronics & Melware (info@melware.de)
*
* This software may be used and distributed according to the terms
* of the GNU General Public License, incorporated herein by reference.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/poll.h>
#include <linux/proc_fs.h>
#include <linux/list.h>
#include <asm/uaccess.h>
#include "platform.h"
#include "debuglib.h"
#undef ID_MASK
#undef N_DATA
#include "pc.h"
#include "di_defs.h"
#include "divasync.h"
#include "di.h"
#include "io.h"
#include "xdi_msg.h"
#include "xdi_adapter.h"
#include "diva.h"
#include "diva_pci.h"
extern PISDN_ADAPTER IoAdapters[MAX_ADAPTER];
extern void divas_get_version(char *);
extern void diva_get_vserial_number(PISDN_ADAPTER IoAdapter, char *buf);
/*********************************************************
** Functions for /proc interface / File operations
*********************************************************/
static char *divas_proc_name = "divas";
static char *adapter_dir_name = "adapter";
static char *info_proc_name = "info";
static char *grp_opt_proc_name = "group_optimization";
static char *d_l1_down_proc_name = "dynamic_l1_down";
/*
** "divas" entry
*/
extern struct proc_dir_entry *proc_net_eicon;
static struct proc_dir_entry *divas_proc_entry = NULL;
static ssize_t
divas_read(struct file *file, char __user *buf, size_t count, loff_t * off)
{
int len = 0;
int cadapter;
char tmpbuf[80];
char tmpser[16];
if (*off)
return 0;
divas_get_version(tmpbuf);
if (copy_to_user(buf + len, &tmpbuf, strlen(tmpbuf)))
return -EFAULT;
len += strlen(tmpbuf);
for (cadapter = 0; cadapter < MAX_ADAPTER; cadapter++) {
if (IoAdapters[cadapter]) {
diva_get_vserial_number(IoAdapters[cadapter],
tmpser);
sprintf(tmpbuf,
"%2d: %-30s Serial:%-10s IRQ:%2d\n",
cadapter + 1,
IoAdapters[cadapter]->Properties.Name,
tmpser,
IoAdapters[cadapter]->irq_info.irq_nr);
if ((strlen(tmpbuf) + len) > count)
break;
if (copy_to_user
(buf + len, &tmpbuf,
strlen(tmpbuf))) return -EFAULT;
len += strlen(tmpbuf);
}
}
*off += len;
return (len);
}
static ssize_t
divas_write(struct file *file, const char __user *buf, size_t count, loff_t * off)
{
return (-ENODEV);
}
static unsigned int divas_poll(struct file *file, poll_table * wait)
{
return (POLLERR);
}
static int divas_open(struct inode *inode, struct file *file)
{
return nonseekable_open(inode, file);
}
static int divas_close(struct inode *inode, struct file *file)
{
return (0);
}
static const struct file_operations divas_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.read = divas_read,
.write = divas_write,
.poll = divas_poll,
.open = divas_open,
.release = divas_close
};
int create_divas_proc(void)
{
divas_proc_entry = create_proc_entry(divas_proc_name,
S_IFREG | S_IRUGO,
proc_net_eicon);
if (!divas_proc_entry)
return (0);
divas_proc_entry->proc_fops = &divas_fops;
divas_proc_entry->owner = THIS_MODULE;
return (1);
}
void remove_divas_proc(void)
{
if (divas_proc_entry) {
remove_proc_entry(divas_proc_name, proc_net_eicon);
divas_proc_entry = NULL;
}
}
/*
** write group_optimization
*/
static int
write_grp_opt(struct file *file, const char __user *buffer, unsigned long count,
void *data)
{
diva_os_xdi_adapter_t *a = (diva_os_xdi_adapter_t *) data;
PISDN_ADAPTER IoAdapter = IoAdapters[a->controller - 1];
if ((count == 1) || (count == 2)) {
char c;
if (get_user(c, buffer))
return -EFAULT;
switch (c) {
case '0':
IoAdapter->capi_cfg.cfg_1 &=
~DIVA_XDI_CAPI_CFG_1_GROUP_POPTIMIZATION_ON;
break;
case '1':
IoAdapter->capi_cfg.cfg_1 |=
DIVA_XDI_CAPI_CFG_1_GROUP_POPTIMIZATION_ON;
break;
default:
return (-EINVAL);
}
return (count);
}
return (-EINVAL);
}
/*
** write dynamic_l1_down
*/
static int
write_d_l1_down(struct file *file, const char __user *buffer, unsigned long count,
void *data)
{
diva_os_xdi_adapter_t *a = (diva_os_xdi_adapter_t *) data;
PISDN_ADAPTER IoAdapter = IoAdapters[a->controller - 1];
if ((count == 1) || (count == 2)) {
char c;
if (get_user(c, buffer))
return -EFAULT;
switch (c) {
case '0':
IoAdapter->capi_cfg.cfg_1 &=
~DIVA_XDI_CAPI_CFG_1_DYNAMIC_L1_ON;
break;
case '1':
IoAdapter->capi_cfg.cfg_1 |=
DIVA_XDI_CAPI_CFG_1_DYNAMIC_L1_ON;
break;
default:
return (-EINVAL);
}
return (count);
}
return (-EINVAL);
}
/*
** read dynamic_l1_down
*/
static int
read_d_l1_down(char *page, char **start, off_t off, int count, int *eof,
void *data)
{
int len = 0;
diva_os_xdi_adapter_t *a = (diva_os_xdi_adapter_t *) data;
PISDN_ADAPTER IoAdapter = IoAdapters[a->controller - 1];
len += sprintf(page + len, "%s\n",
(IoAdapter->capi_cfg.
cfg_1 & DIVA_XDI_CAPI_CFG_1_DYNAMIC_L1_ON) ? "1" :
"0");
if (off + count >= len)
*eof = 1;
if (len < off)
return 0;
*start = page + off;
return ((count < len - off) ? count : len - off);
}
/*
** read group_optimization
*/
static int
read_grp_opt(char *page, char **start, off_t off, int count, int *eof,
void *data)
{
int len = 0;
diva_os_xdi_adapter_t *a = (diva_os_xdi_adapter_t *) data;
PISDN_ADAPTER IoAdapter = IoAdapters[a->controller - 1];
len += sprintf(page + len, "%s\n",
(IoAdapter->capi_cfg.
cfg_1 & DIVA_XDI_CAPI_CFG_1_GROUP_POPTIMIZATION_ON)
? "1" : "0");
if (off + count >= len)
*eof = 1;
if (len < off)
return 0;
*start = page + off;
return ((count < len - off) ? count : len - off);
}
/*
** info write
*/
static int
info_write(struct file *file, const char __user *buffer, unsigned long count,
void *data)
{
diva_os_xdi_adapter_t *a = (diva_os_xdi_adapter_t *) data;
PISDN_ADAPTER IoAdapter = IoAdapters[a->controller - 1];
char c[4];
if (count <= 4)
return -EINVAL;
if (copy_from_user(c, buffer, 4))
return -EFAULT;
/* this is for test purposes only */
if (!memcmp(c, "trap", 4)) {
(*(IoAdapter->os_trap_nfy_Fnc)) (IoAdapter, IoAdapter->ANum);
return (count);
}
return (-EINVAL);
}
/*
** info read
*/
static int
info_read(char *page, char **start, off_t off, int count, int *eof,
void *data)
{
int i = 0;
int len = 0;
char *p;
char tmpser[16];
diva_os_xdi_adapter_t *a = (diva_os_xdi_adapter_t *) data;
PISDN_ADAPTER IoAdapter = IoAdapters[a->controller - 1];
len +=
sprintf(page + len, "Name : %s\n",
IoAdapter->Properties.Name);
len += sprintf(page + len, "DSP state : %08x\n", a->dsp_mask);
len += sprintf(page + len, "Channels : %02d\n",
IoAdapter->Properties.Channels);
len += sprintf(page + len, "E. max/used : %03d/%03d\n",
IoAdapter->e_max, IoAdapter->e_count);
diva_get_vserial_number(IoAdapter, tmpser);
len += sprintf(page + len, "Serial : %s\n", tmpser);
len +=
sprintf(page + len, "IRQ : %d\n",
IoAdapter->irq_info.irq_nr);
len += sprintf(page + len, "CardIndex : %d\n", a->CardIndex);
len += sprintf(page + len, "CardOrdinal : %d\n", a->CardOrdinal);
len += sprintf(page + len, "Controller : %d\n", a->controller);
len += sprintf(page + len, "Bus-Type : %s\n",
(a->Bus ==
DIVAS_XDI_ADAPTER_BUS_ISA) ? "ISA" : "PCI");
len += sprintf(page + len, "Port-Name : %s\n", a->port_name);
if (a->Bus == DIVAS_XDI_ADAPTER_BUS_PCI) {
len +=
sprintf(page + len, "PCI-bus : %d\n",
a->resources.pci.bus);
len +=
sprintf(page + len, "PCI-func : %d\n",
a->resources.pci.func);
for (i = 0; i < 8; i++) {
if (a->resources.pci.bar[i]) {
len +=
sprintf(page + len,
"Mem / I/O %d : 0x%x / mapped : 0x%lx",
i, a->resources.pci.bar[i],
(unsigned long) a->resources.
pci.addr[i]);
if (a->resources.pci.length[i]) {
len +=
sprintf(page + len,
" / length : %d",
a->resources.pci.
length[i]);
}
len += sprintf(page + len, "\n");
}
}
}
if ((!a->xdi_adapter.port) &&
((!a->xdi_adapter.ram) ||
(!a->xdi_adapter.reset)
|| (!a->xdi_adapter.cfg))) {
if (!IoAdapter->irq_info.irq_nr) {
p = "slave";
} else {
p = "out of service";
}
} else if (a->xdi_adapter.trapped) {
p = "trapped";
} else if (a->xdi_adapter.Initialized) {
p = "active";
} else {
p = "ready";
}
len += sprintf(page + len, "State : %s\n", p);
if (off + count >= len)
*eof = 1;
if (len < off)
return 0;
*start = page + off;
return ((count < len - off) ? count : len - off);
}
/*
** adapter proc init/de-init
*/
/* --------------------------------------------------------------------------
Create adapter directory and files in proc file system
-------------------------------------------------------------------------- */
int create_adapter_proc(diva_os_xdi_adapter_t * a)
{
struct proc_dir_entry *de, *pe;
char tmp[16];
sprintf(tmp, "%s%d", adapter_dir_name, a->controller);
if (!(de = proc_mkdir(tmp, proc_net_eicon)))
return (0);
a->proc_adapter_dir = (void *) de;
if (!(pe =
create_proc_entry(info_proc_name, S_IFREG | S_IRUGO | S_IWUSR, de)))
return (0);
a->proc_info = (void *) pe;
pe->write_proc = info_write;
pe->read_proc = info_read;
pe->data = a;
if ((pe = create_proc_entry(grp_opt_proc_name,
S_IFREG | S_IRUGO | S_IWUSR, de))) {
a->proc_grp_opt = (void *) pe;
pe->write_proc = write_grp_opt;
pe->read_proc = read_grp_opt;
pe->data = a;
}
if ((pe = create_proc_entry(d_l1_down_proc_name,
S_IFREG | S_IRUGO | S_IWUSR, de))) {
a->proc_d_l1_down = (void *) pe;
pe->write_proc = write_d_l1_down;
pe->read_proc = read_d_l1_down;
pe->data = a;
}
DBG_TRC(("proc entry %s created", tmp));
return (1);
}
/* --------------------------------------------------------------------------
Remove adapter directory and files in proc file system
-------------------------------------------------------------------------- */
void remove_adapter_proc(diva_os_xdi_adapter_t * a)
{
char tmp[16];
if (a->proc_adapter_dir) {
if (a->proc_d_l1_down) {
remove_proc_entry(d_l1_down_proc_name,
(struct proc_dir_entry *) a->proc_adapter_dir);
}
if (a->proc_grp_opt) {
remove_proc_entry(grp_opt_proc_name,
(struct proc_dir_entry *) a->proc_adapter_dir);
}
if (a->proc_info) {
remove_proc_entry(info_proc_name,
(struct proc_dir_entry *) a->proc_adapter_dir);
}
sprintf(tmp, "%s%d", adapter_dir_name, a->controller);
remove_proc_entry(tmp, proc_net_eicon);
DBG_TRC(("proc entry %s%d removed", adapter_dir_name,
a->controller));
}
}
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