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/*
* ddi.c Implement the Device Driver Interface (DDI) routines.
* Currently, this is only used by the NET layer of LINUX,
* but it eventually might move to an upper directory of
* the system.
*
* Version: @(#)ddi.c 1.0.5 04/22/93
*
* Author: Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
*/
#include <asm/segment.h>
#include <asm/system.h>
#include <linux/types.h>
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/socket.h>
#include <linux/ddi.h>
#undef DDI_DEBUG
#ifdef DDI_DEBUG
# define PRINTK(x) printk x
#else
# define PRINTK(x) /**/
#endif
extern struct ddi_device devices[]; /* device driver map */
extern struct ddi_proto protocols[]; /* network protocols */
/*
* This function gets called with an ASCII string representing the
* ID of some DDI driver. We loop through the DDI Devices table
* and return the address of the control block that has a matching
* "name" field. It is used by upper-level layers that want to
* dynamically bind some UNIX-domain "/dev/XXXX" file name to a
* DDI device driver. The "iflink(8)" program is an example of
* this behaviour.
*/
struct ddi_device *
ddi_map(const char *id)
{
register struct ddi_device *dev;
PRINTK (("DDI: MAP: looking for \"%s\": ", id));
dev = devices;
while (dev->title != NULL) {
if (strncmp(dev->name, id, DDI_MAXNAME) == 0) {
PRINTK (("OK at 0x%X\n", dev));
return(dev);
}
dev++;
}
PRINTK (("NOT FOUND\n"));
return(NULL);
}
/*
* This is the function that is called by a kernel routine during
* system startup. Its purpose is to walk trough the "devices"
* table (defined above), and to call all moduled defined in it.
*/
void
ddi_init(void)
{
struct ddi_proto *pro;
struct ddi_device *dev;
PRINTK (("DDI: Starting up!\n"));
/* First off, kick all configured protocols. */
pro = protocols;
while (pro->name != NULL) {
(*pro->init)(pro);
pro++;
}
/* Done. Now kick all configured device drivers. */
dev = devices;
while (dev->title != NULL) {
(*dev->init)(dev);
dev++;
}
/* We're all done... */
}