4 * Copyright(c) 2010-2013 Intel Corporation. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * * Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * * Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
17 * * Neither the name of Intel Corporation nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 #include "rte_eth_ring.h"
36 #include <rte_ethdev.h>
37 #include <rte_malloc.h>
38 #include <rte_memcpy.h>
39 #include <rte_string_fns.h>
43 volatile unsigned long rx_pkts;
44 volatile unsigned long tx_pkts;
45 volatile unsigned long err_pkts;
48 struct pmd_internals {
49 unsigned nb_rx_queues;
50 unsigned nb_tx_queues;
52 struct ring_queue rx_ring_queues[RTE_PMD_RING_MAX_RX_RINGS];
53 struct ring_queue tx_ring_queues[RTE_PMD_RING_MAX_TX_RINGS];
57 static struct ether_addr eth_addr = { .addr_bytes = {0} };
58 static const char *drivername = "Rings PMD";
59 static struct rte_eth_link pmd_link = {
61 .link_duplex = ETH_LINK_FULL_DUPLEX,
66 eth_ring_rx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
68 void **ptrs = (void *)&bufs[0];
69 struct ring_queue *r = q;
70 const uint16_t nb_rx = (uint16_t)rte_ring_dequeue_burst(r->rng,
72 if (r->rng->flags & RING_F_SC_DEQ)
75 __sync_fetch_and_add(&r->rx_pkts, nb_rx);
80 eth_ring_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
82 void **ptrs = (void *)&bufs[0];
83 struct ring_queue *r = q;
84 const uint16_t nb_tx = (uint16_t)rte_ring_enqueue_burst(r->rng,
86 if (r->rng->flags & RING_F_SP_ENQ) {
88 r->err_pkts += nb_bufs - nb_tx;
90 __sync_fetch_and_add(&r->tx_pkts, nb_tx);
91 __sync_fetch_and_add(&r->err_pkts, nb_bufs - nb_tx);
97 eth_dev_configure(struct rte_eth_dev *dev __rte_unused) { return 0; }
100 eth_dev_start(struct rte_eth_dev *dev)
102 dev->data->dev_link.link_status = 1;
107 eth_dev_stop(struct rte_eth_dev *dev)
109 dev->data->dev_link.link_status = 0;
113 eth_rx_queue_setup(struct rte_eth_dev *dev,uint16_t rx_queue_id,
114 uint16_t nb_rx_desc __rte_unused,
115 unsigned int socket_id __rte_unused,
116 const struct rte_eth_rxconf *rx_conf __rte_unused,
117 struct rte_mempool *mb_pool __rte_unused)
119 struct pmd_internals *internals = dev->data->dev_private;
120 dev->data->rx_queues[rx_queue_id] = &internals->rx_ring_queues[rx_queue_id];
125 eth_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id,
126 uint16_t nb_tx_desc __rte_unused,
127 unsigned int socket_id __rte_unused,
128 const struct rte_eth_txconf *tx_conf __rte_unused)
130 struct pmd_internals *internals = dev->data->dev_private;
131 dev->data->tx_queues[tx_queue_id] = &internals->tx_ring_queues[tx_queue_id];
137 eth_dev_info(struct rte_eth_dev *dev,
138 struct rte_eth_dev_info *dev_info)
140 struct pmd_internals *internals = dev->data->dev_private;
141 dev_info->driver_name = drivername;
142 dev_info->max_mac_addrs = 1;
143 dev_info->max_rx_pktlen = (uint32_t)-1;
144 dev_info->max_rx_queues = (uint16_t)internals->nb_rx_queues;
145 dev_info->max_tx_queues = (uint16_t)internals->nb_tx_queues;
146 dev_info->min_rx_bufsize = 0;
147 dev_info->pci_dev = NULL;
151 eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *igb_stats)
154 unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
155 const struct pmd_internals *internal = dev->data->dev_private;
157 memset(igb_stats, 0, sizeof(*igb_stats));
158 for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
159 i < internal->nb_rx_queues; i++) {
160 igb_stats->q_ipackets[i] = internal->rx_ring_queues[i].rx_pkts;
161 rx_total += igb_stats->q_ipackets[i];
164 for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
165 i < internal->nb_tx_queues; i++) {
166 igb_stats->q_opackets[i] = internal->tx_ring_queues[i].tx_pkts;
167 igb_stats->q_errors[i] = internal->tx_ring_queues[i].err_pkts;
168 tx_total += igb_stats->q_opackets[i];
169 tx_err_total += igb_stats->q_errors[i];
172 igb_stats->ipackets = rx_total;
173 igb_stats->opackets = tx_total;
174 igb_stats->oerrors = tx_err_total;
178 eth_stats_reset(struct rte_eth_dev *dev)
181 struct pmd_internals *internal = dev->data->dev_private;
182 for (i = 0; i < internal->nb_rx_queues; i++)
183 internal->rx_ring_queues[i].rx_pkts = 0;
184 for (i = 0; i < internal->nb_tx_queues; i++) {
185 internal->tx_ring_queues[i].tx_pkts = 0;
186 internal->tx_ring_queues[i].err_pkts = 0;
191 eth_queue_release(void *q __rte_unused) { ; }
193 eth_link_update(struct rte_eth_dev *dev __rte_unused,
194 int wait_to_complete __rte_unused) { return 0; }
196 static struct eth_dev_ops ops = {
197 .dev_start = eth_dev_start,
198 .dev_stop = eth_dev_stop,
199 .dev_configure = eth_dev_configure,
200 .dev_infos_get = eth_dev_info,
201 .rx_queue_setup = eth_rx_queue_setup,
202 .tx_queue_setup = eth_tx_queue_setup,
203 .rx_queue_release = eth_queue_release,
204 .tx_queue_release = eth_queue_release,
205 .link_update = eth_link_update,
206 .stats_get = eth_stats_get,
207 .stats_reset = eth_stats_reset,
211 rte_eth_from_rings(struct rte_ring *const rx_queues[],
212 const unsigned nb_rx_queues,
213 struct rte_ring *const tx_queues[],
214 const unsigned nb_tx_queues,
215 const unsigned numa_node)
217 struct rte_eth_dev_data *data = NULL;
218 struct rte_pci_device *pci_dev = NULL;
219 struct pmd_internals *internals = NULL;
220 struct rte_eth_dev *eth_dev = NULL;
223 /* do some paramter checking */
224 if (rx_queues == NULL && nb_rx_queues > 0)
226 if (tx_queues == NULL && nb_tx_queues > 0)
229 RTE_LOG(INFO, PMD, "Creating rings-backed ethdev on numa socket %u\n",
232 /* now do all data allocation - for eth_dev structure, dummy pci driver
233 * and internal (private) data
235 data = rte_zmalloc_socket(NULL, sizeof(*data), 0, numa_node);
239 pci_dev = rte_zmalloc_socket(NULL, sizeof(*pci_dev), 0, numa_node);
243 internals = rte_zmalloc_socket(NULL, sizeof(*internals), 0, numa_node);
244 if (internals == NULL)
247 /* reserve an ethdev entry */
248 eth_dev = rte_eth_dev_allocate();
252 /* now put it all together
253 * - store queue data in internals,
254 * - store numa_node info in pci_driver
255 * - point eth_dev_data to internals and pci_driver
256 * - and point eth_dev structure to new eth_dev_data structure
258 /* NOTE: we'll replace the data element, of originally allocated eth_dev
259 * so the rings are local per-process */
261 internals->nb_rx_queues = nb_rx_queues;
262 internals->nb_tx_queues = nb_tx_queues;
263 for (i = 0; i < nb_rx_queues; i++) {
264 internals->rx_ring_queues[i].rng = rx_queues[i];
266 for (i = 0; i < nb_tx_queues; i++) {
267 internals->tx_ring_queues[i].rng = tx_queues[i];
270 pci_dev->numa_node = numa_node;
272 data->dev_private = internals;
273 data->port_id = eth_dev->data->port_id;
274 data->nb_rx_queues = (uint16_t)nb_rx_queues;
275 data->nb_tx_queues = (uint16_t)nb_tx_queues;
276 data->dev_link = pmd_link;
277 data->mac_addrs = ð_addr;
279 eth_dev ->data = data;
280 eth_dev ->dev_ops = &ops;
281 eth_dev ->pci_dev = pci_dev;
283 /* finally assign rx and tx ops */
284 eth_dev->rx_pkt_burst = eth_ring_rx;
285 eth_dev->tx_pkt_burst = eth_ring_tx;
305 eth_dev_ring_create(const char *name, const unsigned numa_node,
306 enum dev_action action)
308 /* rx and tx are so-called from point of view of first port.
309 * They are inverted from the point of view of second port
311 struct rte_ring *rxtx[RTE_PMD_RING_MAX_RX_RINGS];
313 char rng_name[RTE_RING_NAMESIZE];
314 unsigned num_rings = RTE_MIN(RTE_PMD_RING_MAX_RX_RINGS,
315 RTE_PMD_RING_MAX_TX_RINGS);
317 for (i = 0; i < num_rings; i++) {
318 rte_snprintf(rng_name, sizeof(rng_name), "ETH_RXTX%u_%s", i, name);
319 rxtx[i] = (action == DEV_CREATE) ?
320 rte_ring_create(rng_name, 1024, numa_node,
321 RING_F_SP_ENQ|RING_F_SC_DEQ) :
322 rte_ring_lookup(rng_name);
327 if (rte_eth_from_rings(rxtx, num_rings, rxtx, num_rings, numa_node))
335 eth_dev_ring_pair_create(const char *name, const unsigned numa_node,
336 enum dev_action action)
338 /* rx and tx are so-called from point of view of first port.
339 * They are inverted from the point of view of second port
341 struct rte_ring *rx[RTE_PMD_RING_MAX_RX_RINGS];
342 struct rte_ring *tx[RTE_PMD_RING_MAX_TX_RINGS];
344 char rng_name[RTE_RING_NAMESIZE];
345 unsigned num_rings = RTE_MIN(RTE_PMD_RING_MAX_RX_RINGS,
346 RTE_PMD_RING_MAX_TX_RINGS);
348 for (i = 0; i < num_rings; i++) {
349 rte_snprintf(rng_name, sizeof(rng_name), "ETH_RX%u_%s", i, name);
350 rx[i] = (action == DEV_CREATE) ?
351 rte_ring_create(rng_name, 1024, numa_node,
352 RING_F_SP_ENQ|RING_F_SC_DEQ) :
353 rte_ring_lookup(rng_name);
356 rte_snprintf(rng_name, sizeof(rng_name), "ETH_TX%u_%s", i, name);
357 tx[i] = (action == DEV_CREATE) ?
358 rte_ring_create(rng_name, 1024, numa_node,
359 RING_F_SP_ENQ|RING_F_SC_DEQ):
360 rte_ring_lookup(rng_name);
365 if (rte_eth_from_rings(rx, num_rings, tx, num_rings, numa_node) ||
366 rte_eth_from_rings(tx, num_rings, rx, num_rings, numa_node) )
373 rte_eth_ring_pair_create(const char *name, const unsigned numa_node)
375 return eth_dev_ring_pair_create(name, numa_node, DEV_CREATE);
379 rte_eth_ring_pair_attach(const char *name, const unsigned numa_node)
381 return eth_dev_ring_pair_create(name, numa_node, DEV_ATTACH);
385 rte_pmd_ring_init(const char *name, const char *params)
388 eth_dev_ring_create(name, rte_socket_id(), DEV_CREATE);
390 RTE_LOG(INFO, PMD, "Ignoring unsupported parameters when creating"
391 " rings-backed ethernet device\n");
392 eth_dev_ring_create(name, rte_socket_id(), DEV_CREATE);