static int init(void)
{
unsigned short int i;
void *b;
lock_static_init(&netif_lock);
NET_LOCK_TAKE();
cos_vect_init_static(&tmap);
rb_init(&rb1_md_wildcard, &rb1);
rb_init(&rb2_md, &rb2);
/* Setup the region from which headers will be transmitted. */
if (cos_buff_mgmt(COS_BM_XMIT_REGION, &xmit_headers, sizeof(xmit_headers), 0)) {
prints("net: error setting up xmit region.");
}
/* Wildcard upcall */
if (cos_net_create_net_brand(0, &rb1_md_wildcard)) BUG();
for (i = 0 ; i < NUM_WILDCARD_BUFFS ; i++) {
if(!(b = alloc_rb_buff(&rb1_md_wildcard))) {
prints("net: could not allocate the ring buffer.");
}
if(rb_add_buff(&rb1_md_wildcard, b, MTU)) {
prints("net: could not populate the ring with buffer");
}
}
NET_LOCK_RELEASE();
return 0;
}
static int cos_net_create_net_brand(unsigned short int port, rb_meta_t *rbm)
{
wildcard_brand_id = sched_create_net_brand(cos_spd_id(), port);
assert(wildcard_brand_id > 0);
if (cos_buff_mgmt(COS_BM_RECV_RING, rb1.packets, sizeof(rb1.packets), wildcard_brand_id)) {
prints("net: could not setup recv ring.\n");
return -1;
}
return 0;
}
static int cos_net_create_net_acap(unsigned short int port, rb_meta_t *rbm)
{
int acap;
acap = cos_async_cap_cntl(COS_ACAP_CREATE, cos_spd_id(), cos_spd_id(), cos_get_thd_id());
assert(acap);
/* cli acap not used. The server acap will be triggered by
* network driver. */
wildcard_acap_id = acap & 0xFFFF;
assert(wildcard_acap_id > 0);
if (sched_create_net_acap(cos_spd_id(), wildcard_acap_id, port)) return -1;
if (cos_buff_mgmt(COS_BM_RECV_RING, rb1.packets, sizeof(rb1.packets), wildcard_acap_id)) {
prints("net: could not setup recv ring.\n");
return -1;
}
return 0;
}
static int __netif_xmit(char *d, unsigned int sz)
{
/* If we're just transmitting a TCP packet without data
* (e.g. ack), then use the fast path here */
assert(d && sz > 0);
xmit_headers.len = 0;
if (sz <= sizeof(xmit_headers.headers)) {
memcpy(&xmit_headers.headers, d, sz);
xmit_headers.len = sz;
xmit_headers.gather_len = 0;
} else {
struct gather_item *gi;
gi = &xmit_headers.gather_list[0];
gi->data = d;
gi->len = sz;
xmit_headers.gather_len = 1;
}
/*
* Here we do 2 things: create a separate gather data entry
* for each packet, and separate the data in individual
* packets into separate gather entries if it crosses page
* boundaries.
*
* This is a general implementation for gather of packets. We
* are, of course, currently doing something simpler.
*/
/* for (i = 0 ; p && i < XMIT_HEADERS_GATHER_LEN ; i++) { */
/* char *data = p->payload; */
/* struct gather_item *gi = &xmit_headers.gather_list[i]; */
/* int len_on_page; */
/* assert(data && p->len < PAGE_SIZE); */
/* gi->data = data; */
/* gi->len = p->len; */
/* len_on_page = (unsigned long)round_up_to_page(data) - (unsigned long)data; */
/* /\* Data split across pages??? *\/ */
/* if (len_on_page < p->len) { */
/* int len_on_second = p->len - len_on_page; */
/* if (XMIT_HEADERS_GATHER_LEN == i+1) goto segment_err; */
/* gi->len = len_on_page; */
/* gi = gi+1; */
/* gi->data = data + len_on_page; */
/* gi->len = len_on_second; */
/* i++; */
/* } */
/* assert(p->type != PBUF_POOL); */
/* assert(p->ref == 1); */
/* p = p->next; */
/* } */
/* if (unlikely(NULL != p)) goto segment_err; */
/* xmit_headers.gather_len = i; */
/* Send the collection of pbuf data on its way. */
if (cos_buff_mgmt(COS_BM_XMIT, NULL, 0, 0)) {
prints("net: could not xmit data.\n");
}
return 0;
/* segment_err: */
/* printc("net: attempted to xmit too many segments"); */
/* goto done; */
}