static void poll_noc_rx_buffer(int pcie_eth_if, uint32_t c2h_q)
{
mppa_pcie_noc_rx_buf_t *bufs[MPPA_PCIE_MULTIBUF_BURST], *buf;
int ret = 0, buf_idx, pkt_idx, count;
struct mpodp_if_config *cfg = netdev_get_eth_if_config(pcie_eth_if);
struct mpodp_c2h_entry free_pkt;
int nb_bufs;
int do_it = 1;
if (netdev_c2h_is_full(cfg, c2h_q)) {
dbg_printf("PCIe eth tx is full !!!\n");
return;
}
nb_bufs = buffer_ring_get_multi(&g_full_buf_pool[pcie_eth_if][c2h_q], bufs,
MPPA_PCIE_MULTIBUF_BURST, NULL);
if (nb_bufs == 0)
return;
assert(ret <= MPPA_PCIE_MULTIBUF_COUNT);
dbg_printf("%d buffer ready to be sent\n", nb_bufs);
for(buf_idx = 0, count = 0; buf_idx < nb_bufs; buf_idx++) {
buf = bufs[buf_idx];
for (pkt_idx = 0; pkt_idx < buf->pkt_count; ++pkt_idx) {
/* Read header from packet */
count++;
do_it = (count % IT_BURSTINESS == 0);
if (do_it)
if (!__builtin_k1_lwu(&cfg->interrupt_status))
do_it = 0;
do {
ret = netdev_c2h_enqueue_data(cfg, c2h_q, &buf->pkts[pkt_idx], &free_pkt,
do_it);
} while (ret < 0);
if (free_pkt.data)
buffer_ring_push_multi(&g_free_buf_pool,
(mppa_pcie_noc_rx_buf_t **)(uintptr_t)&free_pkt.data,
1, NULL);
}
pkt_count[pcie_eth_if]++;
dbg_printf("%d packets handled, total %llu\n", buf->pkt_count, pkt_count[pcie_eth_if]);
}
if (!do_it) {
/* Last data push did not trig an IT, flush if required */
if (__builtin_k1_lwu(&cfg->interrupt_status))
mppa_pcie_send_it_to_host();
}
}
static inline int pcie_add_forward(unsigned int pcie_eth_if_id,
struct mppa_pcie_eth_dnoc_tx_cfg *dnoc_tx_cfg)
{
struct mppa_pcie_eth_if_config * cfg = netdev_get_eth_if_config(pcie_eth_if_id);
struct mppa_pcie_eth_h2c_ring_buff_entry entry;
entry.len = dnoc_tx_cfg->mtu;
entry.pkt_addr = (uint32_t)dnoc_tx_cfg->fifo_addr;
entry.flags = MPPA_PCIE_ETH_NEED_PKT_HDR;
return netdev_h2c_enqueue_buffer(cfg, &entry);
}
static inline int pcie_add_forward(struct mppa_pcie_eth_dnoc_tx_cfg *dnoc_tx_cfg,
mppa_rpc_odp_answer_t *answer)
{
struct mpodp_if_config * cfg =
netdev_get_eth_if_config(dnoc_tx_cfg->pcie_eth_if);
struct mpodp_h2c_entry entry;
entry.pkt_addr = (uint32_t)dnoc_tx_cfg->fifo_addr;
if (netdev_h2c_enqueue_buffer(cfg, dnoc_tx_cfg->h2c_q, &entry)) {
PCIE_RPC_ERR_MSG(answer,
"Failed to register cluster to pcie interface %d\n",
dnoc_tx_cfg->pcie_eth_if);
return -1;
}
return 0;
}
ret = mppa_noc_cnoc_tx_alloc_auto(if_id, &tag, MPPA_NOC_BLOCKING);
assert(ret == MPPA_NOC_RET_SUCCESS);
cnoc_tx_tags[if_id] = tag;
}
return cnoc_tx_tags[if_id];
}
static void pcie_open(unsigned remoteClus, mppa_rpc_odp_t * msg,
mppa_rpc_odp_answer_t *answer)
{
mppa_rpc_odp_cmd_pcie_open_t open_cmd = {.inl_data = msg->inl_data};
struct mppa_pcie_eth_dnoc_tx_cfg *tx_cfg;
int if_id = remoteClus % MPPA_PCIE_USABLE_DNOC_IF;
unsigned int tx_id;
const struct mpodp_if_config * cfg =
netdev_get_eth_if_config(open_cmd.pcie_eth_if_id);
dbg_printf("Received request to open PCIe\n");
if (!netdev_initialized) {
if (netdev_start()){
PCIE_RPC_ERR_MSG(answer, "Failed to initialize netdevs\n");
return;
}
netdev_initialized = 1;
}
if (open_cmd.pkt_size < cfg->mtu) {
PCIE_RPC_ERR_MSG(answer, "Cluster MTU %d is smaller than PCI MTU %d\n",
open_cmd.pkt_size, cfg->mtu);
return;
}