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36 #include <rte_common.h>
37 #include <rte_debug.h>
38 #include <rte_errno.h>
39 #include <rte_ethdev.h>
40 #include <rte_launch.h>
41 #include <rte_lcore.h>
46 #include <rte_byteorder.h>
51 #include "../include/conf.h"
55 #define SEND_PAUSE_FRAME(port_id, duration) send_pause_frame(port_id, duration)
57 #define SEND_PAUSE_FRAME(port_id, duration) do { } while(0)
60 #define ETHER_TYPE_FLOW_CONTROL 0x8808
62 struct ether_fc_frame {
65 } __attribute__((__packed__));
69 unsigned int *low_watermark;
71 uint8_t port_pairs[RTE_MAX_ETHPORTS];
73 struct rte_ring *rings[RTE_MAX_LCORE][RTE_MAX_ETHPORTS];
74 struct rte_mempool *mbuf_pool;
77 static void send_pause_frame(uint8_t port_id, uint16_t duration)
79 struct rte_mbuf *mbuf;
80 struct ether_fc_frame *pause_frame;
81 struct ether_hdr *hdr;
82 struct ether_addr mac_addr;
84 RTE_LOG(DEBUG, USER1, "Sending PAUSE frame (duration=%d) on port %d\n",
87 /* Get a mbuf from the pool */
88 mbuf = rte_pktmbuf_alloc(mbuf_pool);
89 if (unlikely(mbuf == NULL))
92 /* Prepare a PAUSE frame */
93 hdr = rte_pktmbuf_mtod(mbuf, struct ether_hdr *);
94 pause_frame = (struct ether_fc_frame *) &hdr[1];
96 rte_eth_macaddr_get(port_id, &mac_addr);
97 ether_addr_copy(&mac_addr, &hdr->s_addr);
99 void *tmp = &hdr->d_addr.addr_bytes[0];
100 *((uint64_t *)tmp) = 0x010000C28001ULL;
102 hdr->ether_type = rte_cpu_to_be_16(ETHER_TYPE_FLOW_CONTROL);
104 pause_frame->opcode = rte_cpu_to_be_16(0x0001);
105 pause_frame->param = rte_cpu_to_be_16(duration);
110 rte_eth_tx_burst(port_id, 0, &mbuf, 1);
114 * Get the previous enabled lcore ID
117 * The current lcore ID.
119 * The previous enabled lcore_id or -1 if not found.
122 get_previous_lcore_id(unsigned int lcore_id)
126 for (i = lcore_id - 1; i >= 0; i--)
127 if (rte_lcore_is_enabled(i))
134 * Get the last enabled lcore ID
137 * The last enabled lcore_id.
140 get_last_lcore_id(void)
144 for (i = RTE_MAX_LCORE; i >= 0; i--)
145 if (rte_lcore_is_enabled(i))
152 receive_stage(__attribute__((unused)) void *args)
159 unsigned int lcore_id;
161 struct rte_mbuf *pkts[MAX_PKT_QUOTA];
162 struct rte_ring *ring;
163 enum ring_state ring_state[RTE_MAX_ETHPORTS] = { RING_READY };
165 lcore_id = rte_lcore_id();
168 "%s() started on core %u\n", __func__, lcore_id);
172 /* Process each port round robin style */
173 for (port_id = 0; port_id < RTE_MAX_ETHPORTS; port_id++) {
175 if (!is_bit_set(port_id, portmask))
178 ring = rings[lcore_id][port_id];
180 if (ring_state[port_id] != RING_READY) {
181 if (rte_ring_count(ring) > *low_watermark)
184 ring_state[port_id] = RING_READY;
187 /* Enqueue received packets on the RX ring */
188 nb_rx_pkts = rte_eth_rx_burst(port_id, 0, pkts, (uint16_t) *quota);
189 ret = rte_ring_enqueue_bulk(ring, (void *) pkts, nb_rx_pkts);
190 if (ret == -EDQUOT) {
191 ring_state[port_id] = RING_OVERLOADED;
192 send_pause_frame(port_id, 1337);
195 else if (ret == -ENOBUFS) {
197 /* Return mbufs to the pool, effectively dropping packets */
198 for (i = 0; i < nb_rx_pkts; i++)
199 rte_pktmbuf_free(pkts[i]);
206 pipeline_stage(__attribute__((unused)) void *args)
213 unsigned int lcore_id, previous_lcore_id;
215 void *pkts[MAX_PKT_QUOTA];
216 struct rte_ring *rx, *tx;
217 enum ring_state ring_state[RTE_MAX_ETHPORTS] = { RING_READY };
219 lcore_id = rte_lcore_id();
220 previous_lcore_id = get_previous_lcore_id(lcore_id);
223 "%s() started on core %u - processing packets from core %u\n",
224 __func__, lcore_id, previous_lcore_id);
228 for (port_id = 0; port_id < RTE_MAX_ETHPORTS; port_id++) {
230 if (!is_bit_set(port_id, portmask))
233 tx = rings[lcore_id][port_id];
234 rx = rings[previous_lcore_id][port_id];
236 if (ring_state[port_id] != RING_READY) {
237 if (rte_ring_count(tx) > *low_watermark)
240 ring_state[port_id] = RING_READY;
243 /* Dequeue up to quota mbuf from rx */
244 nb_dq_pkts = rte_ring_dequeue_burst(rx, pkts, *quota);
245 if (unlikely(nb_dq_pkts < 0))
248 /* Enqueue them on tx */
249 ret = rte_ring_enqueue_bulk(tx, pkts, nb_dq_pkts);
251 ring_state[port_id] = RING_OVERLOADED;
253 else if (ret == -ENOBUFS) {
255 /* Return mbufs to the pool, effectively dropping packets */
256 for (i = 0; i < nb_dq_pkts; i++)
257 rte_pktmbuf_free(pkts[i]);
264 send_stage(__attribute__((unused)) void *args)
269 uint8_t dest_port_id;
271 unsigned int lcore_id, previous_lcore_id;
274 struct rte_mbuf *tx_pkts[MAX_PKT_QUOTA];
276 lcore_id = rte_lcore_id();
277 previous_lcore_id = get_previous_lcore_id(lcore_id);
280 "%s() started on core %u - processing packets from core %u\n",
281 __func__, lcore_id, previous_lcore_id);
285 /* Process each ring round robin style */
286 for (port_id = 0; port_id < RTE_MAX_ETHPORTS; port_id++) {
288 if (!is_bit_set(port_id, portmask))
291 dest_port_id = port_pairs[port_id];
292 tx = rings[previous_lcore_id][port_id];
294 if (rte_ring_empty(tx))
297 /* Dequeue packets from tx and send them */
298 nb_dq_pkts = (uint16_t) rte_ring_dequeue_burst(tx, (void *) tx_pkts, *quota);
299 rte_eth_tx_burst(dest_port_id, 0, tx_pkts, nb_dq_pkts);
301 /* TODO: Check if nb_dq_pkts == nb_tx_pkts? */
307 main(int argc, char **argv)
310 unsigned int lcore_id, master_lcore_id, last_lcore_id;
314 rte_set_log_level(RTE_LOG_INFO);
316 ret = rte_eal_init(argc, argv);
318 rte_exit(EXIT_FAILURE, "Cannot initialize EAL\n");
324 setup_shared_variables();
327 *low_watermark = 60 * RING_SIZE / 100;
329 last_lcore_id = get_last_lcore_id();
330 master_lcore_id = rte_get_master_lcore();
332 /* Parse the application's arguments */
333 ret = parse_qw_args(argc, argv);
335 rte_exit(EXIT_FAILURE, "Invalid quota/watermark argument(s)\n");
337 /* Create a pool of mbuf to store packets */
338 mbuf_pool = rte_pktmbuf_pool_create("mbuf_pool", MBUF_PER_POOL, 32, 0,
339 MBUF_DATA_SIZE, rte_socket_id());
340 if (mbuf_pool == NULL)
341 rte_panic("%s\n", rte_strerror(rte_errno));
343 for (port_id = 0; port_id < RTE_MAX_ETHPORTS; port_id++)
344 if (is_bit_set(port_id, portmask)) {
345 configure_eth_port(port_id);
346 init_ring(master_lcore_id, port_id);
351 /* Start pipeline_connect() on all the available slave lcore but the last */
352 for (lcore_id = 0 ; lcore_id < last_lcore_id; lcore_id++) {
353 if (rte_lcore_is_enabled(lcore_id) && lcore_id != master_lcore_id) {
355 for (port_id = 0; port_id < RTE_MAX_ETHPORTS; port_id++)
356 if (is_bit_set(port_id, portmask))
357 init_ring(lcore_id, port_id);
359 /* typecast is a workaround for GCC 4.3 bug */
360 rte_eal_remote_launch((int (*)(void *))pipeline_stage, NULL, lcore_id);
364 /* Start send_stage() on the last slave core */
365 /* typecast is a workaround for GCC 4.3 bug */
366 rte_eal_remote_launch((int (*)(void *))send_stage, NULL, last_lcore_id);
368 /* Start receive_stage() on the master core */