static struct page *alloc_new_pde(void)
{
struct page *page;
size_t size = PDE_TABLE_SIZE;
u32 align = PDE_TABLE_ALIGN_SIZE;
spin_lock_irqsave(&pgt_buffer.pgt_lock);
if (pgt_buffer.nr_free == 0) {
/*
* alloc new pgt from system
*/
page = get_free_pages_align(page_nr(size), align, GFP_PGT);
if (!page) {
spin_unlock_irqstore(&pgt_buffer.pgt_lock);
return NULL;
}
pgt_buffer.alloc_nr++;
} else {
page = list_to_page(list_next(&pgt_buffer.list));
list_del(list_next(&pgt_buffer.list));
pgt_buffer.nr_free--;
}
spin_unlock_irqstore(&pgt_buffer.pgt_lock);
return page;
}
void net_set_state(net_interface_t *interface, net_state_t state) {
if(interface->state == state) return;
//FIXME locking
interface->state = state;
//TODO better handle active devices, etc
switch(state) {
case IF_DOWN: {
logf("net - interface is DOWN");
break;
}
case IF_UP: {
logf("net - interface is UP");
break;
}
case IF_READY: {
logf("net - interface is READY");
break;
}
case IF_ERROR: {
logf("net - interface error");
break;
}
default: break;
}
uint32_t flags;
spin_lock_irqsave(&listener_lock, &flags);
listener_chain_fire(state, interface, &listeners);
spin_unlock_irqstore(&listener_lock, flags);
}
void net_put_hostname() {
uint32_t flags;
spin_lock_irqsave(&interface_lock, &flags);
hostname_handles--;
spin_unlock_irqstore(&interface_lock, flags);
}
void unregister_net_state_listener(listener_t *listener) {
uint32_t flags;
spin_lock_irqsave(&listener_lock, &flags);
listener_chain_rm(listener);
spin_unlock_irqstore(&listener_lock, flags);
}
void unregister_net_interface(net_interface_t *interface) {
uint32_t flags;
spin_lock_irqsave(&interface_lock, &flags);
list_rm(&interface->list);
spin_unlock_irqstore(&interface_lock, flags);
}
const char * net_get_hostname() {
uint32_t flags;
spin_lock_irqsave(&interface_lock, &flags);
hostname_handles++;
char *local_name = ACCESS_ONCE(hostname);
spin_unlock_irqstore(&interface_lock, flags);
return local_name;
}
static int release_pde(unsigned long base)
{
struct page *page = va_to_page(base);
spin_lock_irqsave(&pgt_buffer.pgt_lock);
add_page_to_list_tail(page, &pgt_buffer.list);
pgt_buffer.nr_free++;
spin_unlock_irqstore(&pgt_buffer.pgt_lock);
return 0;
}
void register_net_interface(net_interface_t *interface) {
interface->rx_total = 0;
interface->tx_total = 0;
interface->ip_data = 0;
uint32_t flags;
spin_lock_irqsave(&interface_lock, &flags);
list_add(&interface->list, &interfaces);
spin_unlock_irqstore(&interface_lock, flags);
net_set_state(interface, IF_DOWN);
}
