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/******************************************************************************
* Copyright (c) 2004, 2011 IBM Corporation
* All rights reserved.
* This program and the accompanying materials
* are made available under the terms of the BSD License
* which accompanies this distribution, and is available at
* http://www.opensource.org/licenses/bsd-license.php
*
* Contributors:
* IBM Corporation - initial implementation
*****************************************************************************/
#include <netdriver_int.h>
#include <kernel.h>
#include <of.h>
#include <rtas.h>
#include <libelf.h>
#include <cpu.h> /* flush_cache */
#include <unistd.h> /* open, close, read, write */
#include <stdio.h>
#include <pci.h>
#include "modules.h"
extern snk_module_t of_module;
extern char __client_start[];
typedef snk_module_t *(*module_init_t) (snk_kernel_t *, pci_config_t *);
typedef struct {
const char *name;
int type;
} mod_descriptor_t;
static const mod_descriptor_t modules[] = {
{ "net_e1000", MOD_TYPE_NETWORK },
{ "net_bcm", MOD_TYPE_NETWORK },
{ "net_veth", MOD_TYPE_NETWORK },
{ "net_virtio", MOD_TYPE_NETWORK },
{ NULL, 0 }
};
snk_module_t *snk_modules[MODULES_MAX];
extern snk_kernel_t snk_kernel_interface;
/* Load module and call init code.
Init code will check, if module is responsible for device.
Returns -1, if not responsible for device, 0 otherwise.
*/
static int
load_module(const char *name)
{
int len, i;
void *addr;
void *link_addr;
module_init_t module_init;
// Load modules right after the SNK...
// FIXME: hard-coded offset!
link_addr = (void*)__client_start + 0x800000;
// snk_kernel_interface.print("Loading Module '%s'\n", name);
/* find module in module list and lookup link address */
for(i=0; modules[i].name; ++i) {
if(strcmp(modules[i].name, name) == 0)
break;
}
if( modules[i].name == 0 ) {
/* module not in list */
return -1;
}
/* check if link address is used already */
for(i=1; i<MODULES_MAX; ++i) {
if(snk_modules[i] /* && snk_modules[i]->link_addr == link_addr*/) {
// busy, can't load modules
return -2;
}
}
/* find empty position in array of loaded modules */
for(i=0; i<MODULES_MAX; ++i) {
if(snk_modules[i] == 0) {
break;
}
}
if(i == MODULES_MAX) {
// no space avaliable!
return -3;
}
/* Read module from FLASH */
len = romfs_lookup(name, &addr);
if (len <= 0) {
/* file not found */
return -4;
}
/* Copy image from flash to RAM */
if (elf_load_file_to_addr(addr, link_addr, (void*)&module_init,
NULL, flush_cache) != 2) {
snk_kernel_interface.print("ELF loading failed!\n");
return -5;
}
snk_modules[i] = module_init(&snk_kernel_interface, &snk_kernel_interface.pci_conf);
if(snk_modules[i] == 0) {
/* no device found that can be managed by this module */
return -5;
}
if(snk_modules[i]->type == MOD_TYPE_NETWORK) {
/* Get mac address from device tree */
get_mac(snk_modules[i]->mac_addr);
}
return i;
}
void
modules_init(void)
{
int i;
snk_kernel_interface.io_read = read_io;
snk_kernel_interface.io_write = write_io;
snk_modules[0] = &of_module;
/* Setup Module List */
for(i=1; i<MODULES_MAX; ++i) {
snk_modules[i] = 0;
}
/* Load all modules */
for(i=0; modules[i].name; ++i) {
load_module(modules[i].name);
}
}
void
modules_term(void)
{
int i;
/* remove all modules */
for(i=0; i<MODULES_MAX; ++i) {
if(snk_modules[i] && snk_modules[i]->running != 0) {
snk_modules[i]->term();
}
snk_modules[i] = 0;
}
}
snk_module_t *
get_module_by_type(int type) {
int i;
for(i=0; i<MODULES_MAX; ++i) {
if(snk_modules[i] && snk_modules[i]->type == type) {
return snk_modules[i];
}
}
return 0;
}
/**
* insmod_by_type - Load first module of given type
*
* @param type Type of module that we want to load
* @return module descriptor on success
* NULL if not successful
*/
snk_module_t *
insmod_by_type(int type) {
int i, j;
for(i = 0; modules[i].name; ++i) {
if(modules[i].type != type)
continue;
j = load_module(modules[i].name);
if(j >= 0)
return snk_modules[j];
}
return 0;
}
/**
* rmmod_by_type - Remove all module of given type
*
* @param type Type of module that we want to load
*/
void
rmmod_by_type(int type) {
int i;
for (i = 0; i < MODULES_MAX; ++i) {
if (snk_modules[i] && snk_modules[i]->type == type) {
if (snk_modules[i]->running)
snk_modules[i]->term();
snk_modules[i] = 0;
}
}
}
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