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linux/drivers/isdn/hardware/eicon/diva.c
David Howells 7d12e780e0 IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.

The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around.  On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).

Where appropriate, an arch may override the generic storage facility and do
something different with the variable.  On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.

Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions.  Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller.  A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.

I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.

This will affect all archs.  Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

	struct pt_regs *old_regs = set_irq_regs(regs);

And put the old one back at the end:

	set_irq_regs(old_regs);

Don't pass regs through to generic_handle_irq() or __do_IRQ().

In timer_interrupt(), this sort of change will be necessary:

	-	update_process_times(user_mode(regs));
	-	profile_tick(CPU_PROFILING, regs);
	+	update_process_times(user_mode(get_irq_regs()));
	+	profile_tick(CPU_PROFILING);

I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().

Some notes on the interrupt handling in the drivers:

 (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
     the input_dev struct.

 (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
     something different depending on whether it's been supplied with a regs
     pointer or not.

 (*) Various IRQ handler function pointers have been moved to type
     irq_handler_t.

Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 15:10:12 +01:00

659 lines
17 KiB
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/* $Id: diva.c,v 1.21.4.1 2004/05/08 14:33:43 armin Exp $ */
#define CARDTYPE_H_WANT_DATA 1
#define CARDTYPE_H_WANT_IDI_DATA 0
#define CARDTYPE_H_WANT_RESOURCE_DATA 0
#define CARDTYPE_H_WANT_FILE_DATA 0
#include "platform.h"
#include "debuglib.h"
#include "cardtype.h"
#include "pc.h"
#include "di_defs.h"
#include "di.h"
#include "io.h"
#include "pc_maint.h"
#include "xdi_msg.h"
#include "xdi_adapter.h"
#include "diva_pci.h"
#include "diva.h"
#ifdef CONFIG_ISDN_DIVAS_PRIPCI
#include "os_pri.h"
#endif
#ifdef CONFIG_ISDN_DIVAS_BRIPCI
#include "os_bri.h"
#include "os_4bri.h"
#endif
PISDN_ADAPTER IoAdapters[MAX_ADAPTER];
extern IDI_CALL Requests[MAX_ADAPTER];
extern int create_adapter_proc(diva_os_xdi_adapter_t * a);
extern void remove_adapter_proc(diva_os_xdi_adapter_t * a);
#define DivaIdiReqFunc(N) \
static void DivaIdiRequest##N(ENTITY *e) \
{ if ( IoAdapters[N] ) (* IoAdapters[N]->DIRequest)(IoAdapters[N], e) ; }
/*
** Create own 32 Adapters
*/
DivaIdiReqFunc(0)
DivaIdiReqFunc(1)
DivaIdiReqFunc(2)
DivaIdiReqFunc(3)
DivaIdiReqFunc(4)
DivaIdiReqFunc(5)
DivaIdiReqFunc(6)
DivaIdiReqFunc(7)
DivaIdiReqFunc(8)
DivaIdiReqFunc(9)
DivaIdiReqFunc(10)
DivaIdiReqFunc(11)
DivaIdiReqFunc(12)
DivaIdiReqFunc(13)
DivaIdiReqFunc(14)
DivaIdiReqFunc(15)
DivaIdiReqFunc(16)
DivaIdiReqFunc(17)
DivaIdiReqFunc(18)
DivaIdiReqFunc(19)
DivaIdiReqFunc(20)
DivaIdiReqFunc(21)
DivaIdiReqFunc(22)
DivaIdiReqFunc(23)
DivaIdiReqFunc(24)
DivaIdiReqFunc(25)
DivaIdiReqFunc(26)
DivaIdiReqFunc(27)
DivaIdiReqFunc(28)
DivaIdiReqFunc(29)
DivaIdiReqFunc(30)
DivaIdiReqFunc(31)
/*
** LOCALS
*/
static LIST_HEAD(adapter_queue);
typedef struct _diva_get_xlog {
word command;
byte req;
byte rc;
byte data[sizeof(struct mi_pc_maint)];
} diva_get_xlog_t;
typedef struct _diva_supported_cards_info {
int CardOrdinal;
diva_init_card_proc_t init_card;
} diva_supported_cards_info_t;
static diva_supported_cards_info_t divas_supported_cards[] = {
#ifdef CONFIG_ISDN_DIVAS_PRIPCI
/*
PRI Cards
*/
{CARDTYPE_DIVASRV_P_30M_PCI, diva_pri_init_card},
/*
PRI Rev.2 Cards
*/
{CARDTYPE_DIVASRV_P_30M_V2_PCI, diva_pri_init_card},
/*
PRI Rev.2 VoIP Cards
*/
{CARDTYPE_DIVASRV_VOICE_P_30M_V2_PCI, diva_pri_init_card},
#endif
#ifdef CONFIG_ISDN_DIVAS_BRIPCI
/*
4BRI Rev 1 Cards
*/
{CARDTYPE_DIVASRV_Q_8M_PCI, diva_4bri_init_card},
{CARDTYPE_DIVASRV_VOICE_Q_8M_PCI, diva_4bri_init_card},
/*
4BRI Rev 2 Cards
*/
{CARDTYPE_DIVASRV_Q_8M_V2_PCI, diva_4bri_init_card},
{CARDTYPE_DIVASRV_VOICE_Q_8M_V2_PCI, diva_4bri_init_card},
/*
4BRI Based BRI Rev 2 Cards
*/
{CARDTYPE_DIVASRV_B_2M_V2_PCI, diva_4bri_init_card},
{CARDTYPE_DIVASRV_B_2F_PCI, diva_4bri_init_card},
{CARDTYPE_DIVASRV_VOICE_B_2M_V2_PCI, diva_4bri_init_card},
/*
BRI
*/
{CARDTYPE_MAESTRA_PCI, diva_bri_init_card},
#endif
/*
EOL
*/
{-1}
};
static void diva_init_request_array(void);
static void *divas_create_pci_card(int handle, void *pci_dev_handle);
static diva_os_spin_lock_t adapter_lock;
static int diva_find_free_adapters(int base, int nr)
{
int i;
for (i = 0; i < nr; i++) {
if (IoAdapters[base + i]) {
return (-1);
}
}
return (0);
}
static diva_os_xdi_adapter_t *diva_q_get_next(struct list_head * what)
{
diva_os_xdi_adapter_t *a = NULL;
if (what && (what->next != &adapter_queue))
a = list_entry(what->next, diva_os_xdi_adapter_t, link);
return(a);
}
/* --------------------------------------------------------------------------
Add card to the card list
-------------------------------------------------------------------------- */
void *diva_driver_add_card(void *pdev, unsigned long CardOrdinal)
{
diva_os_spin_lock_magic_t old_irql;
diva_os_xdi_adapter_t *pdiva, *pa;
int i, j, max, nr;
for (i = 0; divas_supported_cards[i].CardOrdinal != -1; i++) {
if (divas_supported_cards[i].CardOrdinal == CardOrdinal) {
if (!(pdiva = divas_create_pci_card(i, pdev))) {
return NULL;
}
switch (CardOrdinal) {
case CARDTYPE_DIVASRV_Q_8M_PCI:
case CARDTYPE_DIVASRV_VOICE_Q_8M_PCI:
case CARDTYPE_DIVASRV_Q_8M_V2_PCI:
case CARDTYPE_DIVASRV_VOICE_Q_8M_V2_PCI:
max = MAX_ADAPTER - 4;
nr = 4;
break;
default:
max = MAX_ADAPTER;
nr = 1;
}
diva_os_enter_spin_lock(&adapter_lock, &old_irql, "add card");
for (i = 0; i < max; i++) {
if (!diva_find_free_adapters(i, nr)) {
pdiva->controller = i + 1;
pdiva->xdi_adapter.ANum = pdiva->controller;
IoAdapters[i] = &pdiva->xdi_adapter;
diva_os_leave_spin_lock(&adapter_lock, &old_irql, "add card");
create_adapter_proc(pdiva); /* add adapter to proc file system */
DBG_LOG(("add %s:%d",
CardProperties
[CardOrdinal].Name,
pdiva->controller))
diva_os_enter_spin_lock(&adapter_lock, &old_irql, "add card");
pa = pdiva;
for (j = 1; j < nr; j++) { /* slave adapters, if any */
pa = diva_q_get_next(&pa->link);
if (pa && !pa->interface.cleanup_adapter_proc) {
pa->controller = i + 1 + j;
pa->xdi_adapter.ANum = pa->controller;
IoAdapters[i + j] = &pa->xdi_adapter;
diva_os_leave_spin_lock(&adapter_lock, &old_irql, "add card");
DBG_LOG(("add slave adapter (%d)",
pa->controller))
create_adapter_proc(pa); /* add adapter to proc file system */
diva_os_enter_spin_lock(&adapter_lock, &old_irql, "add card");
} else {
DBG_ERR(("slave adapter problem"))
break;
}
}
diva_os_leave_spin_lock(&adapter_lock, &old_irql, "add card");
return (pdiva);
}
}
diva_os_leave_spin_lock(&adapter_lock, &old_irql, "add card");
/*
Not able to add adapter - remove it and return error
*/
DBG_ERR(("can not alloc request array"))
diva_driver_remove_card(pdiva);
return NULL;
}
}
return NULL;
}
/* --------------------------------------------------------------------------
Called on driver load, MAIN, main, DriverEntry
-------------------------------------------------------------------------- */
int divasa_xdi_driver_entry(void)
{
diva_os_initialize_spin_lock(&adapter_lock, "adapter");
memset(&IoAdapters[0], 0x00, sizeof(IoAdapters));
diva_init_request_array();
return (0);
}
/* --------------------------------------------------------------------------
Remove adapter from list
-------------------------------------------------------------------------- */
static diva_os_xdi_adapter_t *get_and_remove_from_queue(void)
{
diva_os_spin_lock_magic_t old_irql;
diva_os_xdi_adapter_t *a = NULL;
diva_os_enter_spin_lock(&adapter_lock, &old_irql, "driver_unload");
if (!list_empty(&adapter_queue)) {
a = list_entry(adapter_queue.next, diva_os_xdi_adapter_t, link);
list_del(adapter_queue.next);
}
diva_os_leave_spin_lock(&adapter_lock, &old_irql, "driver_unload");
return (a);
}
/* --------------------------------------------------------------------------
Remove card from the card list
-------------------------------------------------------------------------- */
void diva_driver_remove_card(void *pdiva)
{
diva_os_spin_lock_magic_t old_irql;
diva_os_xdi_adapter_t *a[4];
diva_os_xdi_adapter_t *pa;
int i;
pa = a[0] = (diva_os_xdi_adapter_t *) pdiva;
a[1] = a[2] = a[3] = NULL;
diva_os_enter_spin_lock(&adapter_lock, &old_irql, "remode adapter");
for (i = 1; i < 4; i++) {
if ((pa = diva_q_get_next(&pa->link))
&& !pa->interface.cleanup_adapter_proc) {
a[i] = pa;
} else {
break;
}
}
for (i = 0; ((i < 4) && a[i]); i++) {
list_del(&a[i]->link);
}
diva_os_leave_spin_lock(&adapter_lock, &old_irql, "driver_unload");
(*(a[0]->interface.cleanup_adapter_proc)) (a[0]);
for (i = 0; i < 4; i++) {
if (a[i]) {
if (a[i]->controller) {
DBG_LOG(("remove adapter (%d)",
a[i]->controller)) IoAdapters[a[i]->controller - 1] = NULL;
remove_adapter_proc(a[i]);
}
diva_os_free(0, a[i]);
}
}
}
/* --------------------------------------------------------------------------
Create diva PCI adapter and init internal adapter structures
-------------------------------------------------------------------------- */
static void *divas_create_pci_card(int handle, void *pci_dev_handle)
{
diva_supported_cards_info_t *pI = &divas_supported_cards[handle];
diva_os_spin_lock_magic_t old_irql;
diva_os_xdi_adapter_t *a;
DBG_LOG(("found %d-%s", pI->CardOrdinal, CardProperties[pI->CardOrdinal].Name))
if (!(a = (diva_os_xdi_adapter_t *) diva_os_malloc(0, sizeof(*a)))) {
DBG_ERR(("A: can't alloc adapter"));
return NULL;
}
memset(a, 0x00, sizeof(*a));
a->CardIndex = handle;
a->CardOrdinal = pI->CardOrdinal;
a->Bus = DIVAS_XDI_ADAPTER_BUS_PCI;
a->xdi_adapter.cardType = a->CardOrdinal;
a->resources.pci.bus = diva_os_get_pci_bus(pci_dev_handle);
a->resources.pci.func = diva_os_get_pci_func(pci_dev_handle);
a->resources.pci.hdev = pci_dev_handle;
/*
Add master adapter first, so slave adapters will receive higher
numbers as master adapter
*/
diva_os_enter_spin_lock(&adapter_lock, &old_irql, "found_pci_card");
list_add_tail(&a->link, &adapter_queue);
diva_os_leave_spin_lock(&adapter_lock, &old_irql, "found_pci_card");
if ((*(pI->init_card)) (a)) {
diva_os_enter_spin_lock(&adapter_lock, &old_irql, "found_pci_card");
list_del(&a->link);
diva_os_leave_spin_lock(&adapter_lock, &old_irql, "found_pci_card");
diva_os_free(0, a);
DBG_ERR(("A: can't get adapter resources"));
return NULL;
}
return (a);
}
/* --------------------------------------------------------------------------
Called on driver unload FINIT, finit, Unload
-------------------------------------------------------------------------- */
void divasa_xdi_driver_unload(void)
{
diva_os_xdi_adapter_t *a;
while ((a = get_and_remove_from_queue())) {
if (a->interface.cleanup_adapter_proc) {
(*(a->interface.cleanup_adapter_proc)) (a);
}
if (a->controller) {
IoAdapters[a->controller - 1] = NULL;
remove_adapter_proc(a);
}
diva_os_free(0, a);
}
diva_os_destroy_spin_lock(&adapter_lock, "adapter");
}
/*
** Receive and process command from user mode utility
*/
void *diva_xdi_open_adapter(void *os_handle, const void __user *src,
int length,
divas_xdi_copy_from_user_fn_t cp_fn)
{
diva_xdi_um_cfg_cmd_t msg;
diva_os_xdi_adapter_t *a = NULL;
diva_os_spin_lock_magic_t old_irql;
struct list_head *tmp;
if (length < sizeof(diva_xdi_um_cfg_cmd_t)) {
DBG_ERR(("A: A(?) open, msg too small (%d < %d)",
length, sizeof(diva_xdi_um_cfg_cmd_t)))
return NULL;
}
if ((*cp_fn) (os_handle, &msg, src, sizeof(msg)) <= 0) {
DBG_ERR(("A: A(?) open, write error"))
return NULL;
}
diva_os_enter_spin_lock(&adapter_lock, &old_irql, "open_adapter");
list_for_each(tmp, &adapter_queue) {
a = list_entry(tmp, diva_os_xdi_adapter_t, link);
if (a->controller == (int)msg.adapter)
break;
a = NULL;
}
diva_os_leave_spin_lock(&adapter_lock, &old_irql, "open_adapter");
if (!a) {
DBG_ERR(("A: A(%d) open, adapter not found", msg.adapter))
}
return (a);
}
/*
** Easy cleanup mailbox status
*/
void diva_xdi_close_adapter(void *adapter, void *os_handle)
{
diva_os_xdi_adapter_t *a = (diva_os_xdi_adapter_t *) adapter;
a->xdi_mbox.status &= ~DIVA_XDI_MBOX_BUSY;
if (a->xdi_mbox.data) {
diva_os_free(0, a->xdi_mbox.data);
a->xdi_mbox.data = NULL;
}
}
int
diva_xdi_write(void *adapter, void *os_handle, const void __user *src,
int length, divas_xdi_copy_from_user_fn_t cp_fn)
{
diva_os_xdi_adapter_t *a = (diva_os_xdi_adapter_t *) adapter;
void *data;
if (a->xdi_mbox.status & DIVA_XDI_MBOX_BUSY) {
DBG_ERR(("A: A(%d) write, mbox busy", a->controller))
return (-1);
}
if (length < sizeof(diva_xdi_um_cfg_cmd_t)) {
DBG_ERR(("A: A(%d) write, message too small (%d < %d)",
a->controller, length,
sizeof(diva_xdi_um_cfg_cmd_t)))
return (-3);
}
if (!(data = diva_os_malloc(0, length))) {
DBG_ERR(("A: A(%d) write, ENOMEM", a->controller))
return (-2);
}
length = (*cp_fn) (os_handle, data, src, length);
if (length > 0) {
if ((*(a->interface.cmd_proc))
(a, (diva_xdi_um_cfg_cmd_t *) data, length)) {
length = -3;
}
} else {
DBG_ERR(("A: A(%d) write error (%d)", a->controller,
length))
}
diva_os_free(0, data);
return (length);
}
/*
** Write answers to user mode utility, if any
*/
int
diva_xdi_read(void *adapter, void *os_handle, void __user *dst,
int max_length, divas_xdi_copy_to_user_fn_t cp_fn)
{
diva_os_xdi_adapter_t *a = (diva_os_xdi_adapter_t *) adapter;
int ret;
if (!(a->xdi_mbox.status & DIVA_XDI_MBOX_BUSY)) {
DBG_ERR(("A: A(%d) rx mbox empty", a->controller))
return (-1);
}
if (!a->xdi_mbox.data) {
a->xdi_mbox.status &= ~DIVA_XDI_MBOX_BUSY;
DBG_ERR(("A: A(%d) rx ENOMEM", a->controller))
return (-2);
}
if (max_length < a->xdi_mbox.data_length) {
DBG_ERR(("A: A(%d) rx buffer too short(%d < %d)",
a->controller, max_length,
a->xdi_mbox.data_length))
return (-3);
}
ret = (*cp_fn) (os_handle, dst, a->xdi_mbox.data,
a->xdi_mbox.data_length);
if (ret > 0) {
diva_os_free(0, a->xdi_mbox.data);
a->xdi_mbox.data = NULL;
a->xdi_mbox.status &= ~DIVA_XDI_MBOX_BUSY;
}
return (ret);
}
irqreturn_t diva_os_irq_wrapper(int irq, void *context)
{
diva_os_xdi_adapter_t *a = (diva_os_xdi_adapter_t *) context;
diva_xdi_clear_interrupts_proc_t clear_int_proc;
if (!a || !a->xdi_adapter.diva_isr_handler) {
return IRQ_NONE;
}
if ((clear_int_proc = a->clear_interrupts_proc)) {
(*clear_int_proc) (a);
a->clear_interrupts_proc = NULL;
return IRQ_HANDLED;
}
(*(a->xdi_adapter.diva_isr_handler)) (&a->xdi_adapter);
return IRQ_HANDLED;
}
static void diva_init_request_array(void)
{
Requests[0] = DivaIdiRequest0;
Requests[1] = DivaIdiRequest1;
Requests[2] = DivaIdiRequest2;
Requests[3] = DivaIdiRequest3;
Requests[4] = DivaIdiRequest4;
Requests[5] = DivaIdiRequest5;
Requests[6] = DivaIdiRequest6;
Requests[7] = DivaIdiRequest7;
Requests[8] = DivaIdiRequest8;
Requests[9] = DivaIdiRequest9;
Requests[10] = DivaIdiRequest10;
Requests[11] = DivaIdiRequest11;
Requests[12] = DivaIdiRequest12;
Requests[13] = DivaIdiRequest13;
Requests[14] = DivaIdiRequest14;
Requests[15] = DivaIdiRequest15;
Requests[16] = DivaIdiRequest16;
Requests[17] = DivaIdiRequest17;
Requests[18] = DivaIdiRequest18;
Requests[19] = DivaIdiRequest19;
Requests[20] = DivaIdiRequest20;
Requests[21] = DivaIdiRequest21;
Requests[22] = DivaIdiRequest22;
Requests[23] = DivaIdiRequest23;
Requests[24] = DivaIdiRequest24;
Requests[25] = DivaIdiRequest25;
Requests[26] = DivaIdiRequest26;
Requests[27] = DivaIdiRequest27;
Requests[28] = DivaIdiRequest28;
Requests[29] = DivaIdiRequest29;
Requests[30] = DivaIdiRequest30;
Requests[31] = DivaIdiRequest31;
}
void diva_xdi_display_adapter_features(int card)
{
dword features;
if (!card || ((card - 1) >= MAX_ADAPTER) || !IoAdapters[card - 1]) {
return;
}
card--;
features = IoAdapters[card]->Properties.Features;
DBG_LOG(("FEATURES FOR ADAPTER: %d", card + 1))
DBG_LOG((" DI_FAX3 : %s",
(features & DI_FAX3) ? "Y" : "N"))
DBG_LOG((" DI_MODEM : %s",
(features & DI_MODEM) ? "Y" : "N"))
DBG_LOG((" DI_POST : %s",
(features & DI_POST) ? "Y" : "N"))
DBG_LOG((" DI_V110 : %s",
(features & DI_V110) ? "Y" : "N"))
DBG_LOG((" DI_V120 : %s",
(features & DI_V120) ? "Y" : "N"))
DBG_LOG((" DI_POTS : %s",
(features & DI_POTS) ? "Y" : "N"))
DBG_LOG((" DI_CODEC : %s",
(features & DI_CODEC) ? "Y" : "N"))
DBG_LOG((" DI_MANAGE : %s",
(features & DI_MANAGE) ? "Y" : "N"))
DBG_LOG((" DI_V_42 : %s",
(features & DI_V_42) ? "Y" : "N"))
DBG_LOG((" DI_EXTD_FAX : %s",
(features & DI_EXTD_FAX) ? "Y" : "N"))
DBG_LOG((" DI_AT_PARSER : %s",
(features & DI_AT_PARSER) ? "Y" : "N"))
DBG_LOG((" DI_VOICE_OVER_IP : %s",
(features & DI_VOICE_OVER_IP) ? "Y" : "N"))
}
void diva_add_slave_adapter(diva_os_xdi_adapter_t * a)
{
diva_os_spin_lock_magic_t old_irql;
diva_os_enter_spin_lock(&adapter_lock, &old_irql, "add_slave");
list_add_tail(&a->link, &adapter_queue);
diva_os_leave_spin_lock(&adapter_lock, &old_irql, "add_slave");
}
int diva_card_read_xlog(diva_os_xdi_adapter_t * a)
{
diva_get_xlog_t *req;
byte *data;
if (!a->xdi_adapter.Initialized || !a->xdi_adapter.DIRequest) {
return (-1);
}
if (!(data = diva_os_malloc(0, sizeof(struct mi_pc_maint)))) {
return (-1);
}
memset(data, 0x00, sizeof(struct mi_pc_maint));
if (!(req = diva_os_malloc(0, sizeof(*req)))) {
diva_os_free(0, data);
return (-1);
}
req->command = 0x0400;
req->req = LOG;
req->rc = 0x00;
(*(a->xdi_adapter.DIRequest)) (&a->xdi_adapter, (ENTITY *) req);
if (!req->rc || req->req) {
diva_os_free(0, data);
diva_os_free(0, req);
return (-1);
}
memcpy(data, &req->req, sizeof(struct mi_pc_maint));
diva_os_free(0, req);
a->xdi_mbox.data_length = sizeof(struct mi_pc_maint);
a->xdi_mbox.data = data;
a->xdi_mbox.status = DIVA_XDI_MBOX_BUSY;
return (0);
}
void xdiFreeFile(void *handle)
{
}
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