/* $Id: kcapi.c,v 1.1.2.8 2004/03/26 19:57:20 armin Exp $
*
* Kernel CAPI 2 . 0 Module
*
* Copyright 1999 by Carsten Paeth < calle @ calle . de >
* Copyright 2002 by Kai Germaschewski < kai @ germaschewski . name >
*
* This software may be used and distributed according to the terms
* of the GNU General Public License , incorporated herein by reference .
*
*/
#include "kcapi.h"
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/proc_fs.h>
#include <linux/sched/signal.h>
#include <linux/seq_file.h>
#include <linux/skbuff.h>
#include <linux/workqueue.h>
#include <linux/capi.h>
#include <linux/kernelcapi.h>
#include <linux/init.h>
#include <linux/moduleparam.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <linux/isdn/capicmd.h>
#include <linux/isdn/capiutil.h>
#include <linux/mutex.h>
#include <linux/rcupdate.h>
static int showcapimsgs;
static struct workqueue_struct *kcapi_wq;
module_param(showcapimsgs, uint, 0 );
/* ------------------------------------------------------------- */
struct capictr_event {
struct work_struct work;
unsigned int type;
u32 controller;
};
/* ------------------------------------------------------------- */
static const struct capi_version driver_version = {2 , 0 , 1 , 1 << 4 };
static char driver_serial[CAPI_SERIAL_LEN] = "0004711" ;
static char capi_manufakturer[64 ] = "AVM Berlin" ;
#define NCCI2CTRL(ncci) (((ncci) >> 24 ) & 0 x7f)
struct capi_ctr *capi_controller[CAPI_MAXCONTR];
DEFINE_MUTEX(capi_controller_lock);
struct capi20_appl *capi_applications[CAPI_MAXAPPL];
static int ncontrollers;
/* -------- controller ref counting -------------------------------------- */
static inline struct capi_ctr *
capi_ctr_get(struct capi_ctr *ctr)
{
if (!try_module_get(ctr->owner))
return NULL;
return ctr;
}
static inline void
capi_ctr_put(struct capi_ctr *ctr)
{
module_put(ctr->owner);
}
/* ------------------------------------------------------------- */
static inline struct capi_ctr *get_capi_ctr_by_nr(u16 contr)
{
if (contr < 1 || contr - 1 >= CAPI_MAXCONTR)
return NULL;
return capi_controller[contr - 1 ];
}
static inline struct capi20_appl *__get_capi_appl_by_nr(u16 applid)
{
lockdep_assert_held(&capi_controller_lock);
if (applid < 1 || applid - 1 >= CAPI_MAXAPPL)
return NULL;
return capi_applications[applid - 1 ];
}
static inline struct capi20_appl *get_capi_appl_by_nr(u16 applid)
{
if (applid < 1 || applid - 1 >= CAPI_MAXAPPL)
return NULL;
return rcu_dereference(capi_applications[applid - 1 ]);
}
/* -------- util functions ------------------------------------ */
static inline int capi_cmd_valid(u8 cmd)
{
switch (cmd) {
case CAPI_ALERT:
case CAPI_CONNECT:
case CAPI_CONNECT_ACTIVE:
case CAPI_CONNECT_B3_ACTIVE:
case CAPI_CONNECT_B3:
case CAPI_CONNECT_B3_T90_ACTIVE:
case CAPI_DATA_B3:
case CAPI_DISCONNECT_B3:
case CAPI_DISCONNECT:
case CAPI_FACILITY:
case CAPI_INFO:
case CAPI_LISTEN:
case CAPI_MANUFACTURER:
case CAPI_RESET_B3:
case CAPI_SELECT_B_PROTOCOL:
return 1 ;
}
return 0 ;
}
static inline int capi_subcmd_valid(u8 subcmd)
{
switch (subcmd) {
case CAPI_REQ:
case CAPI_CONF:
case CAPI_IND:
case CAPI_RESP:
return 1 ;
}
return 0 ;
}
/* ------------------------------------------------------------ */
static void
register_appl(struct capi_ctr *ctr, u16 applid, capi_register_params *rparam)
{
ctr = capi_ctr_get(ctr);
if (ctr)
ctr->register_appl(ctr, applid, rparam);
else
printk(KERN_WARNING "%s: cannot get controller resources\n" ,
__func__);
}
static void release_appl(struct capi_ctr *ctr, u16 applid)
{
DBG("applid %#x" , applid);
ctr->release_appl(ctr, applid);
capi_ctr_put(ctr);
}
static void notify_up(u32 contr)
{
struct capi20_appl *ap;
struct capi_ctr *ctr;
u16 applid;
mutex_lock(&capi_controller_lock);
if (showcapimsgs & 1 )
printk(KERN_DEBUG "kcapi: notify up contr %d\n" , contr);
ctr = get_capi_ctr_by_nr(contr);
if (ctr) {
if (ctr->state == CAPI_CTR_RUNNING)
goto unlock_out;
ctr->state = CAPI_CTR_RUNNING;
for (applid = 1 ; applid <= CAPI_MAXAPPL; applid++) {
ap = __get_capi_appl_by_nr(applid);
if (ap)
register_appl(ctr, applid, &ap->rparam);
}
} else
printk(KERN_WARNING "%s: invalid contr %d\n" , __func__, contr);
unlock_out:
mutex_unlock(&capi_controller_lock);
}
static void ctr_down(struct capi_ctr *ctr, int new_state)
{
struct capi20_appl *ap;
u16 applid;
if (ctr->state == CAPI_CTR_DETECTED || ctr->state == CAPI_CTR_DETACHED)
return ;
ctr->state = new_state;
memset(ctr->manu, 0 , sizeof (ctr->manu));
memset(&ctr->version, 0 , sizeof (ctr->version));
memset(&ctr->profile, 0 , sizeof (ctr->profile));
memset(ctr->serial, 0 , sizeof (ctr->serial));
for (applid = 1 ; applid <= CAPI_MAXAPPL; applid++) {
ap = __get_capi_appl_by_nr(applid);
if (ap)
capi_ctr_put(ctr);
}
}
static void notify_down(u32 contr)
{
struct capi_ctr *ctr;
mutex_lock(&capi_controller_lock);
if (showcapimsgs & 1 )
printk(KERN_DEBUG "kcapi: notify down contr %d\n" , contr);
ctr = get_capi_ctr_by_nr(contr);
if (ctr)
ctr_down(ctr, CAPI_CTR_DETECTED);
else
printk(KERN_WARNING "%s: invalid contr %d\n" , __func__, contr);
mutex_unlock(&capi_controller_lock);
}
static void do_notify_work(struct work_struct *work)
{
struct capictr_event *event =
container_of(work, struct capictr_event, work);
switch (event->type) {
case CAPICTR_UP:
notify_up(event->controller);
break ;
case CAPICTR_DOWN:
notify_down(event->controller);
break ;
}
kfree(event);
}
static int notify_push(unsigned int event_type, u32 controller)
{
struct capictr_event *event = kmalloc(sizeof (*event), GFP_ATOMIC);
if (!event)
return -ENOMEM;
INIT_WORK(&event->work, do_notify_work);
event->type = event_type;
event->controller = controller;
queue_work(kcapi_wq, &event->work);
return 0 ;
}
/* -------- Receiver ------------------------------------------ */
static void recv_handler(struct work_struct *work)
{
struct sk_buff *skb;
struct capi20_appl *ap =
container_of(work, struct capi20_appl, recv_work);
if ((!ap) || (ap->release_in_progress))
return ;
mutex_lock(&ap->recv_mtx);
while ((skb = skb_dequeue(&ap->recv_queue))) {
if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3_IND)
ap->nrecvdatapkt++;
else
ap->nrecvctlpkt++;
ap->recv_message(ap, skb);
}
mutex_unlock(&ap->recv_mtx);
}
/**
* capi_ctr_handle_message ( ) - handle incoming CAPI message
* @ ctr : controller descriptor structure .
* @ appl : application ID .
* @ skb : message .
*
* Called by hardware driver to pass a CAPI message to the application .
*/
void capi_ctr_handle_message(struct capi_ctr *ctr, u16 appl,
struct sk_buff *skb)
{
struct capi20_appl *ap;
int showctl = 0 ;
u8 cmd, subcmd;
_cdebbuf *cdb;
if (ctr->state != CAPI_CTR_RUNNING) {
cdb = capi_message2str(skb->data);
if (cdb) {
printk(KERN_INFO "kcapi: controller [%03d] not active, got: %s" ,
ctr->cnr, cdb->buf);
cdebbuf_free(cdb);
} else
printk(KERN_INFO "kcapi: controller [%03d] not active, cannot trace\n" ,
ctr->cnr);
goto error;
}
cmd = CAPIMSG_COMMAND(skb->data);
subcmd = CAPIMSG_SUBCOMMAND(skb->data);
if (cmd == CAPI_DATA_B3 && subcmd == CAPI_IND) {
ctr->nrecvdatapkt++;
if (ctr->traceflag > 2 )
showctl |= 2 ;
} else {
ctr->nrecvctlpkt++;
if (ctr->traceflag)
showctl |= 2 ;
}
showctl |= (ctr->traceflag & 1 );
if (showctl & 2 ) {
if (showctl & 1 ) {
printk(KERN_DEBUG "kcapi: got [%03d] id#%d %s len=%u\n" ,
ctr->cnr, CAPIMSG_APPID(skb->data),
capi_cmd2str(cmd, subcmd),
CAPIMSG_LEN(skb->data));
} else {
cdb = capi_message2str(skb->data);
if (cdb) {
printk(KERN_DEBUG "kcapi: got [%03d] %s\n" ,
ctr->cnr, cdb->buf);
cdebbuf_free(cdb);
} else
printk(KERN_DEBUG "kcapi: got [%03d] id#%d %s len=%u, cannot trace\n" ,
ctr->cnr, CAPIMSG_APPID(skb->data),
capi_cmd2str(cmd, subcmd),
CAPIMSG_LEN(skb->data));
}
}
rcu_read_lock();
ap = get_capi_appl_by_nr(CAPIMSG_APPID(skb->data));
if (!ap) {
rcu_read_unlock();
cdb = capi_message2str(skb->data);
if (cdb) {
printk(KERN_ERR "kcapi: handle_message: applid %d state released (%s)\n" ,
CAPIMSG_APPID(skb->data), cdb->buf);
cdebbuf_free(cdb);
} else
printk(KERN_ERR "kcapi: handle_message: applid %d state released (%s) cannot trace\n" ,
CAPIMSG_APPID(skb->data),
capi_cmd2str(cmd, subcmd));
goto error;
}
skb_queue_tail(&ap->recv_queue, skb);
queue_work(kcapi_wq, &ap->recv_work);
rcu_read_unlock();
return ;
error:
kfree_skb(skb);
}
EXPORT_SYMBOL(capi_ctr_handle_message);
/**
* capi_ctr_ready ( ) - signal CAPI controller ready
* @ ctr : controller descriptor structure .
*
* Called by hardware driver to signal that the controller is up and running .
*/
void capi_ctr_ready(struct capi_ctr *ctr)
{
printk(KERN_NOTICE "kcapi: controller [%03d] \" %s\" ready.\n" ,
ctr->cnr, ctr->name);
notify_push(CAPICTR_UP, ctr->cnr);
}
EXPORT_SYMBOL(capi_ctr_ready);
/**
* capi_ctr_down ( ) - signal CAPI controller not ready
* @ ctr : controller descriptor structure .
*
* Called by hardware driver to signal that the controller is down and
* unavailable for use .
*/
void capi_ctr_down(struct capi_ctr *ctr)
{
printk(KERN_NOTICE "kcapi: controller [%03d] down.\n" , ctr->cnr);
notify_push(CAPICTR_DOWN, ctr->cnr);
}
EXPORT_SYMBOL(capi_ctr_down);
/* ------------------------------------------------------------- */
/**
* attach_capi_ctr ( ) - register CAPI controller
* @ ctr : controller descriptor structure .
*
* Called by hardware driver to register a controller with the CAPI subsystem .
* Return value : 0 on success , error code < 0 on error
*/
int attach_capi_ctr(struct capi_ctr *ctr)
{
int i;
mutex_lock(&capi_controller_lock);
for (i = 0 ; i < CAPI_MAXCONTR; i++) {
if (!capi_controller[i])
break ;
}
if (i == CAPI_MAXCONTR) {
mutex_unlock(&capi_controller_lock);
printk(KERN_ERR "kcapi: out of controller slots\n" );
return -EBUSY;
}
capi_controller[i] = ctr;
ctr->nrecvctlpkt = 0 ;
ctr->nrecvdatapkt = 0 ;
ctr->nsentctlpkt = 0 ;
ctr->nsentdatapkt = 0 ;
ctr->cnr = i + 1 ;
ctr->state = CAPI_CTR_DETECTED;
ctr->blocked = 0 ;
ctr->traceflag = showcapimsgs;
sprintf(ctr->procfn, "capi/controllers/%d" , ctr->cnr);
ctr->procent = proc_create_single_data(ctr->procfn, 0 , NULL,
ctr->proc_show, ctr);
ncontrollers++;
mutex_unlock(&capi_controller_lock);
printk(KERN_NOTICE "kcapi: controller [%03d]: %s attached\n" ,
ctr->cnr, ctr->name);
return 0 ;
}
EXPORT_SYMBOL(attach_capi_ctr);
/**
* detach_capi_ctr ( ) - unregister CAPI controller
* @ ctr : controller descriptor structure .
*
* Called by hardware driver to remove the registration of a controller
* with the CAPI subsystem .
* Return value : 0 on success , error code < 0 on error
*/
int detach_capi_ctr(struct capi_ctr *ctr)
{
int err = 0 ;
mutex_lock(&capi_controller_lock);
ctr_down(ctr, CAPI_CTR_DETACHED);
if (ctr->cnr < 1 || ctr->cnr - 1 >= CAPI_MAXCONTR) {
err = -EINVAL;
goto unlock_out;
}
if (capi_controller[ctr->cnr - 1 ] != ctr) {
err = -EINVAL;
goto unlock_out;
}
capi_controller[ctr->cnr - 1 ] = NULL;
ncontrollers--;
if (ctr->procent)
remove_proc_entry(ctr->procfn, NULL);
printk(KERN_NOTICE "kcapi: controller [%03d]: %s unregistered\n" ,
ctr->cnr, ctr->name);
unlock_out:
mutex_unlock(&capi_controller_lock);
return err;
}
EXPORT_SYMBOL(detach_capi_ctr);
/* ------------------------------------------------------------- */
/* -------- CAPI2.0 Interface ---------------------------------- */
/* ------------------------------------------------------------- */
/**
* capi20_isinstalled ( ) - CAPI 2 . 0 operation CAPI_INSTALLED
*
* Return value : CAPI result code ( CAPI_NOERROR if at least one ISDN controller
* is ready for use , CAPI_REGNOTINSTALLED otherwise )
*/
u16 capi20_isinstalled(void )
{
u16 ret = CAPI_REGNOTINSTALLED;
int i;
mutex_lock(&capi_controller_lock);
for (i = 0 ; i < CAPI_MAXCONTR; i++)
if (capi_controller[i] &&
capi_controller[i]->state == CAPI_CTR_RUNNING) {
ret = CAPI_NOERROR;
break ;
}
mutex_unlock(&capi_controller_lock);
return ret;
}
/**
* capi20_register ( ) - CAPI 2 . 0 operation CAPI_REGISTER
* @ ap : CAPI application descriptor structure .
*
* Register an application ' s presence with CAPI .
* A unique application ID is assigned and stored in @ ap - > applid .
* After this function returns successfully , the message receive
* callback function @ ap - > recv_message ( ) may be called at any time
* until capi20_release ( ) has been called for the same @ ap .
* Return value : CAPI result code
*/
u16 capi20_register(struct capi20_appl *ap)
{
int i;
u16 applid;
DBG("" );
if (ap->rparam.datablklen < 128 )
return CAPI_LOGBLKSIZETOSMALL;
ap->nrecvctlpkt = 0 ;
ap->nrecvdatapkt = 0 ;
ap->nsentctlpkt = 0 ;
ap->nsentdatapkt = 0 ;
mutex_init(&ap->recv_mtx);
skb_queue_head_init(&ap->recv_queue);
INIT_WORK(&ap->recv_work, recv_handler);
ap->release_in_progress = 0 ;
mutex_lock(&capi_controller_lock);
for (applid = 1 ; applid <= CAPI_MAXAPPL; applid++) {
if (capi_applications[applid - 1 ] == NULL)
break ;
}
if (applid > CAPI_MAXAPPL) {
mutex_unlock(&capi_controller_lock);
return CAPI_TOOMANYAPPLS;
}
ap->applid = applid;
capi_applications[applid - 1 ] = ap;
for (i = 0 ; i < CAPI_MAXCONTR; i++) {
if (!capi_controller[i] ||
capi_controller[i]->state != CAPI_CTR_RUNNING)
continue ;
register_appl(capi_controller[i], applid, &ap->rparam);
}
mutex_unlock(&capi_controller_lock);
if (showcapimsgs & 1 ) {
printk(KERN_DEBUG "kcapi: appl %d up\n" , applid);
}
return CAPI_NOERROR;
}
/**
* capi20_release ( ) - CAPI 2 . 0 operation CAPI_RELEASE
* @ ap : CAPI application descriptor structure .
*
* Terminate an application ' s registration with CAPI .
* After this function returns successfully , the message receive
* callback function @ ap - > recv_message ( ) will no longer be called .
* Return value : CAPI result code
*/
u16 capi20_release(struct capi20_appl *ap)
{
int i;
DBG("applid %#x" , ap->applid);
mutex_lock(&capi_controller_lock);
ap->release_in_progress = 1 ;
capi_applications[ap->applid - 1 ] = NULL;
synchronize_rcu();
for (i = 0 ; i < CAPI_MAXCONTR; i++) {
if (!capi_controller[i] ||
capi_controller[i]->state != CAPI_CTR_RUNNING)
continue ;
release_appl(capi_controller[i], ap->applid);
}
mutex_unlock(&capi_controller_lock);
flush_workqueue(kcapi_wq);
skb_queue_purge(&ap->recv_queue);
if (showcapimsgs & 1 ) {
printk(KERN_DEBUG "kcapi: appl %d down\n" , ap->applid);
}
return CAPI_NOERROR;
}
/**
* capi20_put_message ( ) - CAPI 2 . 0 operation CAPI_PUT_MESSAGE
* @ ap : CAPI application descriptor structure .
* @ skb : CAPI message .
*
* Transfer a single message to CAPI .
* Return value : CAPI result code
*/
u16 capi20_put_message(struct capi20_appl *ap, struct sk_buff *skb)
{
struct capi_ctr *ctr;
int showctl = 0 ;
u8 cmd, subcmd;
DBG("applid %#x" , ap->applid);
if (ncontrollers == 0 )
return CAPI_REGNOTINSTALLED;
if ((ap->applid == 0 ) || ap->release_in_progress)
return CAPI_ILLAPPNR;
if (skb->len < 12
|| !capi_cmd_valid(CAPIMSG_COMMAND(skb->data))
|| !capi_subcmd_valid(CAPIMSG_SUBCOMMAND(skb->data)))
return CAPI_ILLCMDORSUBCMDORMSGTOSMALL;
/*
* The controller reference is protected by the existence of the
* application passed to us . We assume that the caller properly
* synchronizes this service with capi20_release .
*/
ctr = get_capi_ctr_by_nr(CAPIMSG_CONTROLLER(skb->data));
if (!ctr || ctr->state != CAPI_CTR_RUNNING)
return CAPI_REGNOTINSTALLED;
if (ctr->blocked)
return CAPI_SENDQUEUEFULL;
cmd = CAPIMSG_COMMAND(skb->data);
subcmd = CAPIMSG_SUBCOMMAND(skb->data);
if (cmd == CAPI_DATA_B3 && subcmd == CAPI_REQ) {
ctr->nsentdatapkt++;
ap->nsentdatapkt++;
if (ctr->traceflag > 2 )
showctl |= 2 ;
} else {
ctr->nsentctlpkt++;
ap->nsentctlpkt++;
if (ctr->traceflag)
showctl |= 2 ;
}
showctl |= (ctr->traceflag & 1 );
if (showctl & 2 ) {
if (showctl & 1 ) {
printk(KERN_DEBUG "kcapi: put [%03d] id#%d %s len=%u\n" ,
CAPIMSG_CONTROLLER(skb->data),
CAPIMSG_APPID(skb->data),
capi_cmd2str(cmd, subcmd),
CAPIMSG_LEN(skb->data));
} else {
_cdebbuf *cdb = capi_message2str(skb->data);
if (cdb) {
printk(KERN_DEBUG "kcapi: put [%03d] %s\n" ,
CAPIMSG_CONTROLLER(skb->data),
cdb->buf);
cdebbuf_free(cdb);
} else
printk(KERN_DEBUG "kcapi: put [%03d] id#%d %s len=%u cannot trace\n" ,
CAPIMSG_CONTROLLER(skb->data),
CAPIMSG_APPID(skb->data),
capi_cmd2str(cmd, subcmd),
CAPIMSG_LEN(skb->data));
}
}
return ctr->send_message(ctr, skb);
}
/**
* capi20_get_manufacturer ( ) - CAPI 2 . 0 operation CAPI_GET_MANUFACTURER
* @ contr : controller number .
* @ buf : result buffer ( 64 bytes ) .
*
* Retrieve information about the manufacturer of the specified ISDN controller
* or ( for @ contr = = 0 ) the driver itself .
* Return value : CAPI result code
*/
u16 capi20_get_manufacturer(u32 contr, u8 buf[CAPI_MANUFACTURER_LEN])
{
struct capi_ctr *ctr;
u16 ret;
if (contr == 0 ) {
strscpy_pad(buf, capi_manufakturer, CAPI_MANUFACTURER_LEN);
return CAPI_NOERROR;
}
mutex_lock(&capi_controller_lock);
ctr = get_capi_ctr_by_nr(contr);
if (ctr && ctr->state == CAPI_CTR_RUNNING) {
strscpy_pad(buf, ctr->manu, CAPI_MANUFACTURER_LEN);
ret = CAPI_NOERROR;
} else
ret = CAPI_REGNOTINSTALLED;
mutex_unlock(&capi_controller_lock);
return ret;
}
/**
* capi20_get_version ( ) - CAPI 2 . 0 operation CAPI_GET_VERSION
* @ contr : controller number .
* @ verp : result structure .
*
* Retrieve version information for the specified ISDN controller
* or ( for @ contr = = 0 ) the driver itself .
* Return value : CAPI result code
*/
u16 capi20_get_version(u32 contr, struct capi_version *verp)
{
struct capi_ctr *ctr;
u16 ret;
if (contr == 0 ) {
*verp = driver_version;
return CAPI_NOERROR;
}
mutex_lock(&capi_controller_lock);
ctr = get_capi_ctr_by_nr(contr);
if (ctr && ctr->state == CAPI_CTR_RUNNING) {
memcpy(verp, &ctr->version, sizeof (capi_version));
ret = CAPI_NOERROR;
} else
ret = CAPI_REGNOTINSTALLED;
mutex_unlock(&capi_controller_lock);
return ret;
}
/**
* capi20_get_serial ( ) - CAPI 2 . 0 operation CAPI_GET_SERIAL_NUMBER
* @ contr : controller number .
* @ serial : result buffer ( 8 bytes ) .
*
* Retrieve the serial number of the specified ISDN controller
* or ( for @ contr = = 0 ) the driver itself .
* Return value : CAPI result code
*/
u16 capi20_get_serial(u32 contr, u8 serial[CAPI_SERIAL_LEN])
{
struct capi_ctr *ctr;
u16 ret;
if (contr == 0 ) {
strscpy(serial, driver_serial, CAPI_SERIAL_LEN);
return CAPI_NOERROR;
}
mutex_lock(&capi_controller_lock);
ctr = get_capi_ctr_by_nr(contr);
if (ctr && ctr->state == CAPI_CTR_RUNNING) {
strscpy(serial, ctr->serial, CAPI_SERIAL_LEN);
ret = CAPI_NOERROR;
} else
ret = CAPI_REGNOTINSTALLED;
mutex_unlock(&capi_controller_lock);
return ret;
}
/**
* capi20_get_profile ( ) - CAPI 2 . 0 operation CAPI_GET_PROFILE
* @ contr : controller number .
* @ profp : result structure .
*
* Retrieve capability information for the specified ISDN controller
* or ( for @ contr = = 0 ) the number of installed controllers .
* Return value : CAPI result code
*/
u16 capi20_get_profile(u32 contr, struct capi_profile *profp)
{
struct capi_ctr *ctr;
u16 ret;
if (contr == 0 ) {
profp->ncontroller = ncontrollers;
return CAPI_NOERROR;
}
mutex_lock(&capi_controller_lock);
ctr = get_capi_ctr_by_nr(contr);
if (ctr && ctr->state == CAPI_CTR_RUNNING) {
memcpy(profp, &ctr->profile, sizeof (struct capi_profile));
ret = CAPI_NOERROR;
} else
ret = CAPI_REGNOTINSTALLED;
mutex_unlock(&capi_controller_lock);
return ret;
}
/**
* capi20_manufacturer ( ) - CAPI 2 . 0 operation CAPI_MANUFACTURER
* @ cmd : command .
* @ data : parameter .
*
* Perform manufacturer specific command .
* Return value : CAPI result code
*/
int capi20_manufacturer(unsigned long cmd, void __user *data)
{
struct capi_ctr *ctr;
int retval;
switch (cmd) {
case KCAPI_CMD_TRACE:
{
kcapi_flagdef fdef;
if (copy_from_user(&fdef, data, sizeof (kcapi_flagdef)))
return -EFAULT;
mutex_lock(&capi_controller_lock);
ctr = get_capi_ctr_by_nr(fdef.contr);
if (ctr) {
ctr->traceflag = fdef.flag;
printk(KERN_INFO "kcapi: contr [%03d] set trace=%d\n" ,
ctr->cnr, ctr->traceflag);
retval = 0 ;
} else
retval = -ESRCH;
mutex_unlock(&capi_controller_lock);
return retval;
}
default :
printk(KERN_ERR "kcapi: manufacturer command %lu unknown.\n" ,
cmd);
break ;
}
return -EINVAL;
}
/* ------------------------------------------------------------- */
/* -------- Init & Cleanup ------------------------------------- */
/* ------------------------------------------------------------- */
/*
* init / exit functions
*/
int __init kcapi_init(void )
{
int err;
kcapi_wq = alloc_workqueue("kcapi" , 0 , 0 );
if (!kcapi_wq)
return -ENOMEM;
err = cdebug_init();
if (err) {
destroy_workqueue(kcapi_wq);
return err;
}
if (IS_ENABLED(CONFIG_PROC_FS))
kcapi_proc_init();
return 0 ;
}
void kcapi_exit(void )
{
if (IS_ENABLED(CONFIG_PROC_FS))
kcapi_proc_exit();
cdebug_exit();
destroy_workqueue(kcapi_wq);
}
Messung V0.5 in Prozent C=92 H=97 G=94
¤ Dauer der Verarbeitung: 0.16 Sekunden
(vorverarbeitet am 2026-09-28)
¤
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