2 * Copyright (c) 2014 Nicira, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
30 #include <sys/types.h>
34 #include "dp-packet.h"
35 #include "dpif-netdev.h"
37 #include "netdev-dpdk.h"
38 #include "netdev-provider.h"
39 #include "netdev-vport.h"
41 #include "ofp-print.h"
43 #include "ovs-thread.h"
48 #include "unaligned.h"
51 #include "openvswitch/vlog.h"
53 #include "rte_config.h"
55 #include "rte_virtio_net.h"
57 VLOG_DEFINE_THIS_MODULE(dpdk
);
58 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(5, 20);
60 #define DPDK_PORT_WATCHDOG_INTERVAL 5
62 #define OVS_CACHE_LINE_SIZE CACHE_LINE_SIZE
63 #define OVS_VPORT_DPDK "ovs_dpdk"
66 * need to reserve tons of extra space in the mbufs so we can align the
67 * DMA addresses to 4KB.
70 #define MTU_TO_MAX_LEN(mtu) ((mtu) + ETHER_HDR_LEN + ETHER_CRC_LEN)
71 #define MBUF_SIZE(mtu) (MTU_TO_MAX_LEN(mtu) + (512) + \
72 sizeof(struct rte_mbuf) + RTE_PKTMBUF_HEADROOM)
74 /* Max and min number of packets in the mempool. OVS tries to allocate a
75 * mempool with MAX_NB_MBUF: if this fails (because the system doesn't have
76 * enough hugepages) we keep halving the number until the allocation succeeds
77 * or we reach MIN_NB_MBUF */
79 #define MAX_NB_MBUF (4096 * 64)
80 #define MIN_NB_MBUF (4096 * 4)
81 #define MP_CACHE_SZ RTE_MEMPOOL_CACHE_MAX_SIZE
83 /* MAX_NB_MBUF can be divided by 2 many times, until MIN_NB_MBUF */
84 BUILD_ASSERT_DECL(MAX_NB_MBUF
% ROUND_DOWN_POW2(MAX_NB_MBUF
/MIN_NB_MBUF
) == 0);
86 /* The smallest possible NB_MBUF that we're going to try should be a multiple
87 * of MP_CACHE_SZ. This is advised by DPDK documentation. */
88 BUILD_ASSERT_DECL((MAX_NB_MBUF
/ ROUND_DOWN_POW2(MAX_NB_MBUF
/MIN_NB_MBUF
))
93 #define NIC_PORT_RX_Q_SIZE 2048 /* Size of Physical NIC RX Queue, Max (n+32<=4096)*/
94 #define NIC_PORT_TX_Q_SIZE 2048 /* Size of Physical NIC TX Queue, Max (n+32<=4096)*/
96 static char *cuse_dev_name
= NULL
; /* Character device cuse_dev_name. */
97 static char *vhost_sock_dir
= NULL
; /* Location of vhost-user sockets */
100 * Maximum amount of time in micro seconds to try and enqueue to vhost.
102 #define VHOST_ENQ_RETRY_USECS 100
104 static const struct rte_eth_conf port_conf
= {
106 .mq_mode
= ETH_MQ_RX_RSS
,
108 .header_split
= 0, /* Header Split disabled */
109 .hw_ip_checksum
= 0, /* IP checksum offload disabled */
110 .hw_vlan_filter
= 0, /* VLAN filtering disabled */
111 .jumbo_frame
= 0, /* Jumbo Frame Support disabled */
117 .rss_hf
= ETH_RSS_IP
| ETH_RSS_UDP
| ETH_RSS_TCP
,
121 .mq_mode
= ETH_MQ_TX_NONE
,
125 enum { MAX_TX_QUEUE_LEN
= 384 };
126 enum { DPDK_RING_SIZE
= 256 };
127 BUILD_ASSERT_DECL(IS_POW2(DPDK_RING_SIZE
));
128 enum { DRAIN_TSC
= 200000ULL };
135 static int rte_eal_init_ret
= ENODEV
;
137 static struct ovs_mutex dpdk_mutex
= OVS_MUTEX_INITIALIZER
;
139 /* Contains all 'struct dpdk_dev's. */
140 static struct ovs_list dpdk_list
OVS_GUARDED_BY(dpdk_mutex
)
141 = OVS_LIST_INITIALIZER(&dpdk_list
);
143 static struct ovs_list dpdk_mp_list
OVS_GUARDED_BY(dpdk_mutex
)
144 = OVS_LIST_INITIALIZER(&dpdk_mp_list
);
146 /* This mutex must be used by non pmd threads when allocating or freeing
147 * mbufs through mempools. Since dpdk_queue_pkts() and dpdk_queue_flush() may
148 * use mempools, a non pmd thread should hold this mutex while calling them */
149 static struct ovs_mutex nonpmd_mempool_mutex
= OVS_MUTEX_INITIALIZER
;
152 struct rte_mempool
*mp
;
156 struct ovs_list list_node
OVS_GUARDED_BY(dpdk_mutex
);
159 /* There should be one 'struct dpdk_tx_queue' created for
161 struct dpdk_tx_queue
{
162 bool flush_tx
; /* Set to true to flush queue everytime */
163 /* pkts are queued. */
165 rte_spinlock_t tx_lock
; /* Protects the members and the NIC queue
166 * from concurrent access. It is used only
167 * if the queue is shared among different
168 * pmd threads (see 'txq_needs_locking'). */
170 struct rte_mbuf
*burst_pkts
[MAX_TX_QUEUE_LEN
];
173 /* dpdk has no way to remove dpdk ring ethernet devices
174 so we have to keep them around once they've been created
177 static struct ovs_list dpdk_ring_list
OVS_GUARDED_BY(dpdk_mutex
)
178 = OVS_LIST_INITIALIZER(&dpdk_ring_list
);
181 /* For the client rings */
182 struct rte_ring
*cring_tx
;
183 struct rte_ring
*cring_rx
;
184 int user_port_id
; /* User given port no, parsed from port name */
185 int eth_port_id
; /* ethernet device port id */
186 struct ovs_list list_node
OVS_GUARDED_BY(dpdk_mutex
);
193 enum dpdk_dev_type type
;
195 struct dpdk_tx_queue
*tx_q
;
197 struct ovs_mutex mutex
OVS_ACQ_AFTER(dpdk_mutex
);
199 struct dpdk_mp
*dpdk_mp
;
203 struct netdev_stats stats
;
205 rte_spinlock_t stats_lock
;
207 struct eth_addr hwaddr
;
208 enum netdev_flags flags
;
210 struct rte_eth_link link
;
213 /* The user might request more txqs than the NIC has. We remap those
214 * ('up.n_txq') on these ('real_n_txq').
215 * If the numbers match, 'txq_needs_locking' is false, otherwise it is
216 * true and we will take a spinlock on transmission */
218 bool txq_needs_locking
;
220 /* Spinlock for vhost transmission. Other DPDK devices use spinlocks in
222 rte_spinlock_t vhost_tx_lock
;
224 /* virtio-net structure for vhost device */
225 OVSRCU_TYPE(struct virtio_net
*) virtio_dev
;
227 /* Identifier used to distinguish vhost devices from each other */
228 char vhost_id
[PATH_MAX
];
231 struct ovs_list list_node
OVS_GUARDED_BY(dpdk_mutex
);
234 struct netdev_rxq_dpdk
{
235 struct netdev_rxq up
;
239 static bool thread_is_pmd(void);
241 static int netdev_dpdk_construct(struct netdev
*);
243 struct virtio_net
* netdev_dpdk_get_virtio(const struct netdev_dpdk
*dev
);
246 is_dpdk_class(const struct netdev_class
*class)
248 return class->construct
== netdev_dpdk_construct
;
251 /* XXX: use dpdk malloc for entire OVS. in fact huge page should be used
252 * for all other segments data, bss and text. */
255 dpdk_rte_mzalloc(size_t sz
)
259 ptr
= rte_zmalloc(OVS_VPORT_DPDK
, sz
, OVS_CACHE_LINE_SIZE
);
266 /* XXX this function should be called only by pmd threads (or by non pmd
267 * threads holding the nonpmd_mempool_mutex) */
269 free_dpdk_buf(struct dp_packet
*p
)
271 struct rte_mbuf
*pkt
= (struct rte_mbuf
*) p
;
273 rte_pktmbuf_free_seg(pkt
);
277 __rte_pktmbuf_init(struct rte_mempool
*mp
,
278 void *opaque_arg OVS_UNUSED
,
280 unsigned i OVS_UNUSED
)
282 struct rte_mbuf
*m
= _m
;
283 uint32_t buf_len
= mp
->elt_size
- sizeof(struct dp_packet
);
285 RTE_MBUF_ASSERT(mp
->elt_size
>= sizeof(struct dp_packet
));
287 memset(m
, 0, mp
->elt_size
);
289 /* start of buffer is just after mbuf structure */
290 m
->buf_addr
= (char *)m
+ sizeof(struct dp_packet
);
291 m
->buf_physaddr
= rte_mempool_virt2phy(mp
, m
) +
292 sizeof(struct dp_packet
);
293 m
->buf_len
= (uint16_t)buf_len
;
295 /* keep some headroom between start of buffer and data */
296 m
->data_off
= RTE_MIN(RTE_PKTMBUF_HEADROOM
, m
->buf_len
);
298 /* init some constant fields */
305 ovs_rte_pktmbuf_init(struct rte_mempool
*mp
,
306 void *opaque_arg OVS_UNUSED
,
308 unsigned i OVS_UNUSED
)
310 struct rte_mbuf
*m
= _m
;
312 __rte_pktmbuf_init(mp
, opaque_arg
, _m
, i
);
314 dp_packet_init_dpdk((struct dp_packet
*) m
, m
->buf_len
);
317 static struct dpdk_mp
*
318 dpdk_mp_get(int socket_id
, int mtu
) OVS_REQUIRES(dpdk_mutex
)
320 struct dpdk_mp
*dmp
= NULL
;
321 char mp_name
[RTE_MEMPOOL_NAMESIZE
];
324 LIST_FOR_EACH (dmp
, list_node
, &dpdk_mp_list
) {
325 if (dmp
->socket_id
== socket_id
&& dmp
->mtu
== mtu
) {
331 dmp
= dpdk_rte_mzalloc(sizeof *dmp
);
332 dmp
->socket_id
= socket_id
;
336 mp_size
= MAX_NB_MBUF
;
338 if (snprintf(mp_name
, RTE_MEMPOOL_NAMESIZE
, "ovs_mp_%d_%d_%u",
339 dmp
->mtu
, dmp
->socket_id
, mp_size
) < 0) {
343 dmp
->mp
= rte_mempool_create(mp_name
, mp_size
, MBUF_SIZE(mtu
),
345 sizeof(struct rte_pktmbuf_pool_private
),
346 rte_pktmbuf_pool_init
, NULL
,
347 ovs_rte_pktmbuf_init
, NULL
,
349 } while (!dmp
->mp
&& rte_errno
== ENOMEM
&& (mp_size
/= 2) >= MIN_NB_MBUF
);
351 if (dmp
->mp
== NULL
) {
354 VLOG_DBG("Allocated \"%s\" mempool with %u mbufs", mp_name
, mp_size
);
357 list_push_back(&dpdk_mp_list
, &dmp
->list_node
);
362 dpdk_mp_put(struct dpdk_mp
*dmp
)
370 ovs_assert(dmp
->refcount
>= 0);
373 /* I could not find any API to destroy mp. */
374 if (dmp
->refcount
== 0) {
375 list_delete(dmp
->list_node
);
376 /* destroy mp-pool. */
382 check_link_status(struct netdev_dpdk
*dev
)
384 struct rte_eth_link link
;
386 rte_eth_link_get_nowait(dev
->port_id
, &link
);
388 if (dev
->link
.link_status
!= link
.link_status
) {
389 netdev_change_seq_changed(&dev
->up
);
391 dev
->link_reset_cnt
++;
393 if (dev
->link
.link_status
) {
394 VLOG_DBG_RL(&rl
, "Port %d Link Up - speed %u Mbps - %s",
395 dev
->port_id
, (unsigned)dev
->link
.link_speed
,
396 (dev
->link
.link_duplex
== ETH_LINK_FULL_DUPLEX
) ?
397 ("full-duplex") : ("half-duplex"));
399 VLOG_DBG_RL(&rl
, "Port %d Link Down", dev
->port_id
);
405 dpdk_watchdog(void *dummy OVS_UNUSED
)
407 struct netdev_dpdk
*dev
;
409 pthread_detach(pthread_self());
412 ovs_mutex_lock(&dpdk_mutex
);
413 LIST_FOR_EACH (dev
, list_node
, &dpdk_list
) {
414 ovs_mutex_lock(&dev
->mutex
);
415 check_link_status(dev
);
416 ovs_mutex_unlock(&dev
->mutex
);
418 ovs_mutex_unlock(&dpdk_mutex
);
419 xsleep(DPDK_PORT_WATCHDOG_INTERVAL
);
426 dpdk_eth_dev_queue_setup(struct netdev_dpdk
*dev
, int n_rxq
, int n_txq
)
431 /* A device may report more queues than it makes available (this has
432 * been observed for Intel xl710, which reserves some of them for
433 * SRIOV): rte_eth_*_queue_setup will fail if a queue is not
434 * available. When this happens we can retry the configuration
435 * and request less queues */
436 while (n_rxq
&& n_txq
) {
438 VLOG_INFO("Retrying setup with (rxq:%d txq:%d)", n_rxq
, n_txq
);
441 diag
= rte_eth_dev_configure(dev
->port_id
, n_rxq
, n_txq
, &port_conf
);
446 for (i
= 0; i
< n_txq
; i
++) {
447 diag
= rte_eth_tx_queue_setup(dev
->port_id
, i
, NIC_PORT_TX_Q_SIZE
,
448 dev
->socket_id
, NULL
);
450 VLOG_INFO("Interface %s txq(%d) setup error: %s",
451 dev
->up
.name
, i
, rte_strerror(-diag
));
457 /* Retry with less tx queues */
462 for (i
= 0; i
< n_rxq
; i
++) {
463 diag
= rte_eth_rx_queue_setup(dev
->port_id
, i
, NIC_PORT_RX_Q_SIZE
,
464 dev
->socket_id
, NULL
,
467 VLOG_INFO("Interface %s rxq(%d) setup error: %s",
468 dev
->up
.name
, i
, rte_strerror(-diag
));
474 /* Retry with less rx queues */
479 dev
->up
.n_rxq
= n_rxq
;
480 dev
->real_n_txq
= n_txq
;
490 dpdk_eth_dev_init(struct netdev_dpdk
*dev
) OVS_REQUIRES(dpdk_mutex
)
492 struct rte_pktmbuf_pool_private
*mbp_priv
;
493 struct rte_eth_dev_info info
;
494 struct ether_addr eth_addr
;
498 if (dev
->port_id
< 0 || dev
->port_id
>= rte_eth_dev_count()) {
502 rte_eth_dev_info_get(dev
->port_id
, &info
);
504 n_rxq
= MIN(info
.max_rx_queues
, dev
->up
.n_rxq
);
505 n_txq
= MIN(info
.max_tx_queues
, dev
->up
.n_txq
);
507 diag
= dpdk_eth_dev_queue_setup(dev
, n_rxq
, n_txq
);
509 VLOG_ERR("Interface %s(rxq:%d txq:%d) configure error: %s",
510 dev
->up
.name
, n_rxq
, n_txq
, rte_strerror(-diag
));
514 diag
= rte_eth_dev_start(dev
->port_id
);
516 VLOG_ERR("Interface %s start error: %s", dev
->up
.name
,
517 rte_strerror(-diag
));
521 rte_eth_promiscuous_enable(dev
->port_id
);
522 rte_eth_allmulticast_enable(dev
->port_id
);
524 memset(ð_addr
, 0x0, sizeof(eth_addr
));
525 rte_eth_macaddr_get(dev
->port_id
, ð_addr
);
526 VLOG_INFO_RL(&rl
, "Port %d: "ETH_ADDR_FMT
"",
527 dev
->port_id
, ETH_ADDR_BYTES_ARGS(eth_addr
.addr_bytes
));
529 memcpy(dev
->hwaddr
.ea
, eth_addr
.addr_bytes
, ETH_ADDR_LEN
);
530 rte_eth_link_get_nowait(dev
->port_id
, &dev
->link
);
532 mbp_priv
= rte_mempool_get_priv(dev
->dpdk_mp
->mp
);
533 dev
->buf_size
= mbp_priv
->mbuf_data_room_size
- RTE_PKTMBUF_HEADROOM
;
535 dev
->flags
= NETDEV_UP
| NETDEV_PROMISC
;
539 static struct netdev_dpdk
*
540 netdev_dpdk_cast(const struct netdev
*netdev
)
542 return CONTAINER_OF(netdev
, struct netdev_dpdk
, up
);
545 static struct netdev
*
546 netdev_dpdk_alloc(void)
548 struct netdev_dpdk
*netdev
= dpdk_rte_mzalloc(sizeof *netdev
);
553 netdev_dpdk_alloc_txq(struct netdev_dpdk
*netdev
, unsigned int n_txqs
)
557 netdev
->tx_q
= dpdk_rte_mzalloc(n_txqs
* sizeof *netdev
->tx_q
);
558 for (i
= 0; i
< n_txqs
; i
++) {
559 int numa_id
= ovs_numa_get_numa_id(i
);
561 if (!netdev
->txq_needs_locking
) {
562 /* Each index is considered as a cpu core id, since there should
563 * be one tx queue for each cpu core. If the corresponding core
564 * is not on the same numa node as 'netdev', flags the
566 netdev
->tx_q
[i
].flush_tx
= netdev
->socket_id
== numa_id
;
568 /* Queues are shared among CPUs. Always flush */
569 netdev
->tx_q
[i
].flush_tx
= true;
571 rte_spinlock_init(&netdev
->tx_q
[i
].tx_lock
);
576 netdev_dpdk_init(struct netdev
*netdev_
, unsigned int port_no
,
577 enum dpdk_dev_type type
)
578 OVS_REQUIRES(dpdk_mutex
)
580 struct netdev_dpdk
*netdev
= netdev_dpdk_cast(netdev_
);
584 ovs_mutex_init(&netdev
->mutex
);
585 ovs_mutex_lock(&netdev
->mutex
);
587 rte_spinlock_init(&netdev
->stats_lock
);
589 /* If the 'sid' is negative, it means that the kernel fails
590 * to obtain the pci numa info. In that situation, always
592 if (type
== DPDK_DEV_ETH
) {
593 sid
= rte_eth_dev_socket_id(port_no
);
595 sid
= rte_lcore_to_socket_id(rte_get_master_lcore());
598 netdev
->socket_id
= sid
< 0 ? SOCKET0
: sid
;
599 netdev
->port_id
= port_no
;
602 netdev
->mtu
= ETHER_MTU
;
603 netdev
->max_packet_len
= MTU_TO_MAX_LEN(netdev
->mtu
);
605 netdev
->dpdk_mp
= dpdk_mp_get(netdev
->socket_id
, netdev
->mtu
);
606 if (!netdev
->dpdk_mp
) {
611 netdev_
->n_txq
= NR_QUEUE
;
612 netdev_
->n_rxq
= NR_QUEUE
;
613 netdev
->real_n_txq
= NR_QUEUE
;
615 if (type
== DPDK_DEV_ETH
) {
616 netdev_dpdk_alloc_txq(netdev
, NR_QUEUE
);
617 err
= dpdk_eth_dev_init(netdev
);
623 list_push_back(&dpdk_list
, &netdev
->list_node
);
627 rte_free(netdev
->tx_q
);
629 ovs_mutex_unlock(&netdev
->mutex
);
634 dpdk_dev_parse_name(const char dev_name
[], const char prefix
[],
635 unsigned int *port_no
)
639 if (strncmp(dev_name
, prefix
, strlen(prefix
))) {
643 cport
= dev_name
+ strlen(prefix
);
644 *port_no
= strtol(cport
, NULL
, 0); /* string must be null terminated */
649 vhost_construct_helper(struct netdev
*netdev_
) OVS_REQUIRES(dpdk_mutex
)
651 struct netdev_dpdk
*netdev
= netdev_dpdk_cast(netdev_
);
653 if (rte_eal_init_ret
) {
654 return rte_eal_init_ret
;
657 rte_spinlock_init(&netdev
->vhost_tx_lock
);
658 return netdev_dpdk_init(netdev_
, -1, DPDK_DEV_VHOST
);
662 netdev_dpdk_vhost_cuse_construct(struct netdev
*netdev_
)
664 struct netdev_dpdk
*netdev
= netdev_dpdk_cast(netdev_
);
667 ovs_mutex_lock(&dpdk_mutex
);
668 strncpy(netdev
->vhost_id
, netdev
->up
.name
, sizeof(netdev
->vhost_id
));
669 err
= vhost_construct_helper(netdev_
);
670 ovs_mutex_unlock(&dpdk_mutex
);
675 netdev_dpdk_vhost_user_construct(struct netdev
*netdev_
)
677 struct netdev_dpdk
*netdev
= netdev_dpdk_cast(netdev_
);
680 ovs_mutex_lock(&dpdk_mutex
);
681 /* Take the name of the vhost-user port and append it to the location where
682 * the socket is to be created, then register the socket.
684 snprintf(netdev
->vhost_id
, sizeof(netdev
->vhost_id
), "%s/%s",
685 vhost_sock_dir
, netdev_
->name
);
686 err
= rte_vhost_driver_register(netdev
->vhost_id
);
688 VLOG_ERR("vhost-user socket device setup failure for socket %s\n",
691 VLOG_INFO("Socket %s created for vhost-user port %s\n", netdev
->vhost_id
, netdev_
->name
);
692 err
= vhost_construct_helper(netdev_
);
693 ovs_mutex_unlock(&dpdk_mutex
);
698 netdev_dpdk_construct(struct netdev
*netdev
)
700 unsigned int port_no
;
703 if (rte_eal_init_ret
) {
704 return rte_eal_init_ret
;
707 /* Names always start with "dpdk" */
708 err
= dpdk_dev_parse_name(netdev
->name
, "dpdk", &port_no
);
713 ovs_mutex_lock(&dpdk_mutex
);
714 err
= netdev_dpdk_init(netdev
, port_no
, DPDK_DEV_ETH
);
715 ovs_mutex_unlock(&dpdk_mutex
);
720 netdev_dpdk_destruct(struct netdev
*netdev_
)
722 struct netdev_dpdk
*dev
= netdev_dpdk_cast(netdev_
);
724 ovs_mutex_lock(&dev
->mutex
);
725 rte_eth_dev_stop(dev
->port_id
);
726 ovs_mutex_unlock(&dev
->mutex
);
728 ovs_mutex_lock(&dpdk_mutex
);
730 list_remove(&dev
->list_node
);
731 dpdk_mp_put(dev
->dpdk_mp
);
732 ovs_mutex_unlock(&dpdk_mutex
);
736 netdev_dpdk_vhost_destruct(struct netdev
*netdev_
)
738 struct netdev_dpdk
*dev
= netdev_dpdk_cast(netdev_
);
740 /* Can't remove a port while a guest is attached to it. */
741 if (netdev_dpdk_get_virtio(dev
) != NULL
) {
742 VLOG_ERR("Can not remove port, vhost device still attached");
746 ovs_mutex_lock(&dpdk_mutex
);
747 list_remove(&dev
->list_node
);
748 dpdk_mp_put(dev
->dpdk_mp
);
749 ovs_mutex_unlock(&dpdk_mutex
);
753 netdev_dpdk_dealloc(struct netdev
*netdev_
)
755 struct netdev_dpdk
*netdev
= netdev_dpdk_cast(netdev_
);
761 netdev_dpdk_get_config(const struct netdev
*netdev_
, struct smap
*args
)
763 struct netdev_dpdk
*dev
= netdev_dpdk_cast(netdev_
);
765 ovs_mutex_lock(&dev
->mutex
);
767 smap_add_format(args
, "configured_rx_queues", "%d", netdev_
->n_rxq
);
768 smap_add_format(args
, "requested_tx_queues", "%d", netdev_
->n_txq
);
769 smap_add_format(args
, "configured_tx_queues", "%d", dev
->real_n_txq
);
770 ovs_mutex_unlock(&dev
->mutex
);
776 netdev_dpdk_get_numa_id(const struct netdev
*netdev_
)
778 struct netdev_dpdk
*netdev
= netdev_dpdk_cast(netdev_
);
780 return netdev
->socket_id
;
783 /* Sets the number of tx queues and rx queues for the dpdk interface.
784 * If the configuration fails, do not try restoring its old configuration
785 * and just returns the error. */
787 netdev_dpdk_set_multiq(struct netdev
*netdev_
, unsigned int n_txq
,
790 struct netdev_dpdk
*netdev
= netdev_dpdk_cast(netdev_
);
792 int old_rxq
, old_txq
;
794 if (netdev
->up
.n_txq
== n_txq
&& netdev
->up
.n_rxq
== n_rxq
) {
798 ovs_mutex_lock(&dpdk_mutex
);
799 ovs_mutex_lock(&netdev
->mutex
);
801 rte_eth_dev_stop(netdev
->port_id
);
803 old_txq
= netdev
->up
.n_txq
;
804 old_rxq
= netdev
->up
.n_rxq
;
805 netdev
->up
.n_txq
= n_txq
;
806 netdev
->up
.n_rxq
= n_rxq
;
808 rte_free(netdev
->tx_q
);
809 err
= dpdk_eth_dev_init(netdev
);
810 netdev_dpdk_alloc_txq(netdev
, netdev
->real_n_txq
);
812 /* If there has been an error, it means that the requested queues
813 * have not been created. Restore the old numbers. */
814 netdev
->up
.n_txq
= old_txq
;
815 netdev
->up
.n_rxq
= old_rxq
;
818 netdev
->txq_needs_locking
= netdev
->real_n_txq
!= netdev
->up
.n_txq
;
820 ovs_mutex_unlock(&netdev
->mutex
);
821 ovs_mutex_unlock(&dpdk_mutex
);
827 netdev_dpdk_vhost_set_multiq(struct netdev
*netdev_
, unsigned int n_txq
,
830 struct netdev_dpdk
*netdev
= netdev_dpdk_cast(netdev_
);
833 if (netdev
->up
.n_txq
== n_txq
&& netdev
->up
.n_rxq
== n_rxq
) {
837 ovs_mutex_lock(&dpdk_mutex
);
838 ovs_mutex_lock(&netdev
->mutex
);
840 netdev
->up
.n_txq
= n_txq
;
841 netdev
->real_n_txq
= 1;
842 netdev
->up
.n_rxq
= 1;
844 ovs_mutex_unlock(&netdev
->mutex
);
845 ovs_mutex_unlock(&dpdk_mutex
);
850 static struct netdev_rxq
*
851 netdev_dpdk_rxq_alloc(void)
853 struct netdev_rxq_dpdk
*rx
= dpdk_rte_mzalloc(sizeof *rx
);
858 static struct netdev_rxq_dpdk
*
859 netdev_rxq_dpdk_cast(const struct netdev_rxq
*rx
)
861 return CONTAINER_OF(rx
, struct netdev_rxq_dpdk
, up
);
865 netdev_dpdk_rxq_construct(struct netdev_rxq
*rxq_
)
867 struct netdev_rxq_dpdk
*rx
= netdev_rxq_dpdk_cast(rxq_
);
868 struct netdev_dpdk
*netdev
= netdev_dpdk_cast(rx
->up
.netdev
);
870 ovs_mutex_lock(&netdev
->mutex
);
871 rx
->port_id
= netdev
->port_id
;
872 ovs_mutex_unlock(&netdev
->mutex
);
878 netdev_dpdk_rxq_destruct(struct netdev_rxq
*rxq_ OVS_UNUSED
)
883 netdev_dpdk_rxq_dealloc(struct netdev_rxq
*rxq_
)
885 struct netdev_rxq_dpdk
*rx
= netdev_rxq_dpdk_cast(rxq_
);
891 dpdk_queue_flush__(struct netdev_dpdk
*dev
, int qid
)
893 struct dpdk_tx_queue
*txq
= &dev
->tx_q
[qid
];
896 while (nb_tx
!= txq
->count
) {
899 ret
= rte_eth_tx_burst(dev
->port_id
, qid
, txq
->burst_pkts
+ nb_tx
,
908 if (OVS_UNLIKELY(nb_tx
!= txq
->count
)) {
909 /* free buffers, which we couldn't transmit, one at a time (each
910 * packet could come from a different mempool) */
913 for (i
= nb_tx
; i
< txq
->count
; i
++) {
914 rte_pktmbuf_free_seg(txq
->burst_pkts
[i
]);
916 rte_spinlock_lock(&dev
->stats_lock
);
917 dev
->stats
.tx_dropped
+= txq
->count
-nb_tx
;
918 rte_spinlock_unlock(&dev
->stats_lock
);
922 txq
->tsc
= rte_get_timer_cycles();
926 dpdk_queue_flush(struct netdev_dpdk
*dev
, int qid
)
928 struct dpdk_tx_queue
*txq
= &dev
->tx_q
[qid
];
930 if (txq
->count
== 0) {
933 dpdk_queue_flush__(dev
, qid
);
937 is_vhost_running(struct virtio_net
*dev
)
939 return (dev
!= NULL
&& (dev
->flags
& VIRTIO_DEV_RUNNING
));
943 * The receive path for the vhost port is the TX path out from guest.
946 netdev_dpdk_vhost_rxq_recv(struct netdev_rxq
*rxq_
,
947 struct dp_packet
**packets
, int *c
)
949 struct netdev_rxq_dpdk
*rx
= netdev_rxq_dpdk_cast(rxq_
);
950 struct netdev
*netdev
= rx
->up
.netdev
;
951 struct netdev_dpdk
*vhost_dev
= netdev_dpdk_cast(netdev
);
952 struct virtio_net
*virtio_dev
= netdev_dpdk_get_virtio(vhost_dev
);
956 if (OVS_UNLIKELY(!is_vhost_running(virtio_dev
))) {
960 nb_rx
= rte_vhost_dequeue_burst(virtio_dev
, qid
,
961 vhost_dev
->dpdk_mp
->mp
,
962 (struct rte_mbuf
**)packets
,
968 rte_spinlock_lock(&vhost_dev
->stats_lock
);
969 vhost_dev
->stats
.rx_packets
+= (uint64_t)nb_rx
;
970 rte_spinlock_unlock(&vhost_dev
->stats_lock
);
977 netdev_dpdk_rxq_recv(struct netdev_rxq
*rxq_
, struct dp_packet
**packets
,
980 struct netdev_rxq_dpdk
*rx
= netdev_rxq_dpdk_cast(rxq_
);
981 struct netdev
*netdev
= rx
->up
.netdev
;
982 struct netdev_dpdk
*dev
= netdev_dpdk_cast(netdev
);
985 /* There is only one tx queue for this core. Do not flush other
987 * Do not flush tx queue which is shared among CPUs
988 * since it is always flushed */
989 if (rxq_
->queue_id
== rte_lcore_id() &&
990 OVS_LIKELY(!dev
->txq_needs_locking
)) {
991 dpdk_queue_flush(dev
, rxq_
->queue_id
);
994 nb_rx
= rte_eth_rx_burst(rx
->port_id
, rxq_
->queue_id
,
995 (struct rte_mbuf
**) packets
,
1007 __netdev_dpdk_vhost_send(struct netdev
*netdev
, struct dp_packet
**pkts
,
1008 int cnt
, bool may_steal
)
1010 struct netdev_dpdk
*vhost_dev
= netdev_dpdk_cast(netdev
);
1011 struct virtio_net
*virtio_dev
= netdev_dpdk_get_virtio(vhost_dev
);
1012 struct rte_mbuf
**cur_pkts
= (struct rte_mbuf
**) pkts
;
1013 unsigned int total_pkts
= cnt
;
1016 if (OVS_UNLIKELY(!is_vhost_running(virtio_dev
))) {
1017 rte_spinlock_lock(&vhost_dev
->stats_lock
);
1018 vhost_dev
->stats
.tx_dropped
+= cnt
;
1019 rte_spinlock_unlock(&vhost_dev
->stats_lock
);
1023 /* There is vHost TX single queue, So we need to lock it for TX. */
1024 rte_spinlock_lock(&vhost_dev
->vhost_tx_lock
);
1027 unsigned int tx_pkts
;
1029 tx_pkts
= rte_vhost_enqueue_burst(virtio_dev
, VIRTIO_RXQ
,
1031 if (OVS_LIKELY(tx_pkts
)) {
1032 /* Packets have been sent.*/
1034 /* Prepare for possible next iteration.*/
1035 cur_pkts
= &cur_pkts
[tx_pkts
];
1037 uint64_t timeout
= VHOST_ENQ_RETRY_USECS
* rte_get_timer_hz() / 1E6
;
1038 unsigned int expired
= 0;
1041 start
= rte_get_timer_cycles();
1045 * Unable to enqueue packets to vhost interface.
1046 * Check available entries before retrying.
1048 while (!rte_vring_available_entries(virtio_dev
, VIRTIO_RXQ
)) {
1049 if (OVS_UNLIKELY((rte_get_timer_cycles() - start
) > timeout
)) {
1055 /* break out of main loop. */
1060 rte_spinlock_unlock(&vhost_dev
->vhost_tx_lock
);
1062 rte_spinlock_lock(&vhost_dev
->stats_lock
);
1063 vhost_dev
->stats
.tx_packets
+= (total_pkts
- cnt
);
1064 vhost_dev
->stats
.tx_dropped
+= cnt
;
1065 rte_spinlock_unlock(&vhost_dev
->stats_lock
);
1071 for (i
= 0; i
< total_pkts
; i
++) {
1072 dp_packet_delete(pkts
[i
]);
1078 dpdk_queue_pkts(struct netdev_dpdk
*dev
, int qid
,
1079 struct rte_mbuf
**pkts
, int cnt
)
1081 struct dpdk_tx_queue
*txq
= &dev
->tx_q
[qid
];
1087 int freeslots
= MAX_TX_QUEUE_LEN
- txq
->count
;
1088 int tocopy
= MIN(freeslots
, cnt
-i
);
1090 memcpy(&txq
->burst_pkts
[txq
->count
], &pkts
[i
],
1091 tocopy
* sizeof (struct rte_mbuf
*));
1093 txq
->count
+= tocopy
;
1096 if (txq
->count
== MAX_TX_QUEUE_LEN
|| txq
->flush_tx
) {
1097 dpdk_queue_flush__(dev
, qid
);
1099 diff_tsc
= rte_get_timer_cycles() - txq
->tsc
;
1100 if (diff_tsc
>= DRAIN_TSC
) {
1101 dpdk_queue_flush__(dev
, qid
);
1106 /* Tx function. Transmit packets indefinitely */
1108 dpdk_do_tx_copy(struct netdev
*netdev
, int qid
, struct dp_packet
**pkts
,
1110 OVS_NO_THREAD_SAFETY_ANALYSIS
1112 #if !defined(__CHECKER__) && !defined(_WIN32)
1113 const size_t PKT_ARRAY_SIZE
= cnt
;
1115 /* Sparse or MSVC doesn't like variable length array. */
1116 enum { PKT_ARRAY_SIZE
= NETDEV_MAX_BURST
};
1118 struct netdev_dpdk
*dev
= netdev_dpdk_cast(netdev
);
1119 struct rte_mbuf
*mbufs
[PKT_ARRAY_SIZE
];
1124 /* If we are on a non pmd thread we have to use the mempool mutex, because
1125 * every non pmd thread shares the same mempool cache */
1127 if (!thread_is_pmd()) {
1128 ovs_mutex_lock(&nonpmd_mempool_mutex
);
1131 for (i
= 0; i
< cnt
; i
++) {
1132 int size
= dp_packet_size(pkts
[i
]);
1134 if (OVS_UNLIKELY(size
> dev
->max_packet_len
)) {
1135 VLOG_WARN_RL(&rl
, "Too big size %d max_packet_len %d",
1136 (int)size
, dev
->max_packet_len
);
1142 mbufs
[newcnt
] = rte_pktmbuf_alloc(dev
->dpdk_mp
->mp
);
1144 if (!mbufs
[newcnt
]) {
1149 /* We have to do a copy for now */
1150 memcpy(rte_pktmbuf_mtod(mbufs
[newcnt
], void *), dp_packet_data(pkts
[i
]), size
);
1152 rte_pktmbuf_data_len(mbufs
[newcnt
]) = size
;
1153 rte_pktmbuf_pkt_len(mbufs
[newcnt
]) = size
;
1158 if (OVS_UNLIKELY(dropped
)) {
1159 rte_spinlock_lock(&dev
->stats_lock
);
1160 dev
->stats
.tx_dropped
+= dropped
;
1161 rte_spinlock_unlock(&dev
->stats_lock
);
1164 if (dev
->type
== DPDK_DEV_VHOST
) {
1165 __netdev_dpdk_vhost_send(netdev
, (struct dp_packet
**) mbufs
, newcnt
, true);
1167 dpdk_queue_pkts(dev
, qid
, mbufs
, newcnt
);
1168 dpdk_queue_flush(dev
, qid
);
1171 if (!thread_is_pmd()) {
1172 ovs_mutex_unlock(&nonpmd_mempool_mutex
);
1177 netdev_dpdk_vhost_send(struct netdev
*netdev
, int qid OVS_UNUSED
, struct dp_packet
**pkts
,
1178 int cnt
, bool may_steal
)
1180 if (OVS_UNLIKELY(pkts
[0]->source
!= DPBUF_DPDK
)) {
1183 dpdk_do_tx_copy(netdev
, qid
, pkts
, cnt
);
1185 for (i
= 0; i
< cnt
; i
++) {
1186 dp_packet_delete(pkts
[i
]);
1190 __netdev_dpdk_vhost_send(netdev
, pkts
, cnt
, may_steal
);
1196 netdev_dpdk_send__(struct netdev_dpdk
*dev
, int qid
,
1197 struct dp_packet
**pkts
, int cnt
, bool may_steal
)
1201 if (OVS_UNLIKELY(dev
->txq_needs_locking
)) {
1202 qid
= qid
% dev
->real_n_txq
;
1203 rte_spinlock_lock(&dev
->tx_q
[qid
].tx_lock
);
1206 if (OVS_UNLIKELY(!may_steal
||
1207 pkts
[0]->source
!= DPBUF_DPDK
)) {
1208 struct netdev
*netdev
= &dev
->up
;
1210 dpdk_do_tx_copy(netdev
, qid
, pkts
, cnt
);
1213 for (i
= 0; i
< cnt
; i
++) {
1214 dp_packet_delete(pkts
[i
]);
1218 int next_tx_idx
= 0;
1221 for (i
= 0; i
< cnt
; i
++) {
1222 int size
= dp_packet_size(pkts
[i
]);
1224 if (OVS_UNLIKELY(size
> dev
->max_packet_len
)) {
1225 if (next_tx_idx
!= i
) {
1226 dpdk_queue_pkts(dev
, qid
,
1227 (struct rte_mbuf
**)&pkts
[next_tx_idx
],
1231 VLOG_WARN_RL(&rl
, "Too big size %d max_packet_len %d",
1232 (int)size
, dev
->max_packet_len
);
1234 dp_packet_delete(pkts
[i
]);
1236 next_tx_idx
= i
+ 1;
1239 if (next_tx_idx
!= cnt
) {
1240 dpdk_queue_pkts(dev
, qid
,
1241 (struct rte_mbuf
**)&pkts
[next_tx_idx
],
1245 if (OVS_UNLIKELY(dropped
)) {
1246 rte_spinlock_lock(&dev
->stats_lock
);
1247 dev
->stats
.tx_dropped
+= dropped
;
1248 rte_spinlock_unlock(&dev
->stats_lock
);
1252 if (OVS_UNLIKELY(dev
->txq_needs_locking
)) {
1253 rte_spinlock_unlock(&dev
->tx_q
[qid
].tx_lock
);
1258 netdev_dpdk_eth_send(struct netdev
*netdev
, int qid
,
1259 struct dp_packet
**pkts
, int cnt
, bool may_steal
)
1261 struct netdev_dpdk
*dev
= netdev_dpdk_cast(netdev
);
1263 netdev_dpdk_send__(dev
, qid
, pkts
, cnt
, may_steal
);
1268 netdev_dpdk_set_etheraddr(struct netdev
*netdev
, const struct eth_addr mac
)
1270 struct netdev_dpdk
*dev
= netdev_dpdk_cast(netdev
);
1272 ovs_mutex_lock(&dev
->mutex
);
1273 if (!eth_addr_equals(dev
->hwaddr
, mac
)) {
1275 netdev_change_seq_changed(netdev
);
1277 ovs_mutex_unlock(&dev
->mutex
);
1283 netdev_dpdk_get_etheraddr(const struct netdev
*netdev
, struct eth_addr
*mac
)
1285 struct netdev_dpdk
*dev
= netdev_dpdk_cast(netdev
);
1287 ovs_mutex_lock(&dev
->mutex
);
1289 ovs_mutex_unlock(&dev
->mutex
);
1295 netdev_dpdk_get_mtu(const struct netdev
*netdev
, int *mtup
)
1297 struct netdev_dpdk
*dev
= netdev_dpdk_cast(netdev
);
1299 ovs_mutex_lock(&dev
->mutex
);
1301 ovs_mutex_unlock(&dev
->mutex
);
1307 netdev_dpdk_set_mtu(const struct netdev
*netdev
, int mtu
)
1309 struct netdev_dpdk
*dev
= netdev_dpdk_cast(netdev
);
1311 struct dpdk_mp
*old_mp
;
1314 ovs_mutex_lock(&dpdk_mutex
);
1315 ovs_mutex_lock(&dev
->mutex
);
1316 if (dev
->mtu
== mtu
) {
1321 mp
= dpdk_mp_get(dev
->socket_id
, dev
->mtu
);
1327 rte_eth_dev_stop(dev
->port_id
);
1330 old_mp
= dev
->dpdk_mp
;
1333 dev
->max_packet_len
= MTU_TO_MAX_LEN(dev
->mtu
);
1335 err
= dpdk_eth_dev_init(dev
);
1339 dev
->dpdk_mp
= old_mp
;
1340 dev
->max_packet_len
= MTU_TO_MAX_LEN(dev
->mtu
);
1341 dpdk_eth_dev_init(dev
);
1345 dpdk_mp_put(old_mp
);
1346 netdev_change_seq_changed(netdev
);
1348 ovs_mutex_unlock(&dev
->mutex
);
1349 ovs_mutex_unlock(&dpdk_mutex
);
1354 netdev_dpdk_get_carrier(const struct netdev
*netdev_
, bool *carrier
);
1357 netdev_dpdk_vhost_get_stats(const struct netdev
*netdev
,
1358 struct netdev_stats
*stats
)
1360 struct netdev_dpdk
*dev
= netdev_dpdk_cast(netdev
);
1362 ovs_mutex_lock(&dev
->mutex
);
1363 memset(stats
, 0, sizeof(*stats
));
1364 /* Unsupported Stats */
1365 stats
->rx_errors
= UINT64_MAX
;
1366 stats
->tx_errors
= UINT64_MAX
;
1367 stats
->multicast
= UINT64_MAX
;
1368 stats
->collisions
= UINT64_MAX
;
1369 stats
->rx_crc_errors
= UINT64_MAX
;
1370 stats
->rx_fifo_errors
= UINT64_MAX
;
1371 stats
->rx_frame_errors
= UINT64_MAX
;
1372 stats
->rx_length_errors
= UINT64_MAX
;
1373 stats
->rx_missed_errors
= UINT64_MAX
;
1374 stats
->rx_over_errors
= UINT64_MAX
;
1375 stats
->tx_aborted_errors
= UINT64_MAX
;
1376 stats
->tx_carrier_errors
= UINT64_MAX
;
1377 stats
->tx_errors
= UINT64_MAX
;
1378 stats
->tx_fifo_errors
= UINT64_MAX
;
1379 stats
->tx_heartbeat_errors
= UINT64_MAX
;
1380 stats
->tx_window_errors
= UINT64_MAX
;
1381 stats
->rx_bytes
+= UINT64_MAX
;
1382 stats
->rx_dropped
+= UINT64_MAX
;
1383 stats
->tx_bytes
+= UINT64_MAX
;
1385 rte_spinlock_lock(&dev
->stats_lock
);
1386 /* Supported Stats */
1387 stats
->rx_packets
+= dev
->stats
.rx_packets
;
1388 stats
->tx_packets
+= dev
->stats
.tx_packets
;
1389 stats
->tx_dropped
+= dev
->stats
.tx_dropped
;
1390 rte_spinlock_unlock(&dev
->stats_lock
);
1391 ovs_mutex_unlock(&dev
->mutex
);
1397 netdev_dpdk_get_stats(const struct netdev
*netdev
, struct netdev_stats
*stats
)
1399 struct netdev_dpdk
*dev
= netdev_dpdk_cast(netdev
);
1400 struct rte_eth_stats rte_stats
;
1403 netdev_dpdk_get_carrier(netdev
, &gg
);
1404 ovs_mutex_lock(&dev
->mutex
);
1405 rte_eth_stats_get(dev
->port_id
, &rte_stats
);
1407 memset(stats
, 0, sizeof(*stats
));
1409 stats
->rx_packets
= rte_stats
.ipackets
;
1410 stats
->tx_packets
= rte_stats
.opackets
;
1411 stats
->rx_bytes
= rte_stats
.ibytes
;
1412 stats
->tx_bytes
= rte_stats
.obytes
;
1413 stats
->rx_errors
= rte_stats
.ierrors
;
1414 stats
->tx_errors
= rte_stats
.oerrors
;
1415 stats
->multicast
= rte_stats
.imcasts
;
1417 rte_spinlock_lock(&dev
->stats_lock
);
1418 stats
->tx_dropped
= dev
->stats
.tx_dropped
;
1419 rte_spinlock_unlock(&dev
->stats_lock
);
1420 ovs_mutex_unlock(&dev
->mutex
);
1426 netdev_dpdk_get_features(const struct netdev
*netdev_
,
1427 enum netdev_features
*current
,
1428 enum netdev_features
*advertised OVS_UNUSED
,
1429 enum netdev_features
*supported OVS_UNUSED
,
1430 enum netdev_features
*peer OVS_UNUSED
)
1432 struct netdev_dpdk
*dev
= netdev_dpdk_cast(netdev_
);
1433 struct rte_eth_link link
;
1435 ovs_mutex_lock(&dev
->mutex
);
1437 ovs_mutex_unlock(&dev
->mutex
);
1439 if (link
.link_duplex
== ETH_LINK_AUTONEG_DUPLEX
) {
1440 if (link
.link_speed
== ETH_LINK_SPEED_AUTONEG
) {
1441 *current
= NETDEV_F_AUTONEG
;
1443 } else if (link
.link_duplex
== ETH_LINK_HALF_DUPLEX
) {
1444 if (link
.link_speed
== ETH_LINK_SPEED_10
) {
1445 *current
= NETDEV_F_10MB_HD
;
1447 if (link
.link_speed
== ETH_LINK_SPEED_100
) {
1448 *current
= NETDEV_F_100MB_HD
;
1450 if (link
.link_speed
== ETH_LINK_SPEED_1000
) {
1451 *current
= NETDEV_F_1GB_HD
;
1453 } else if (link
.link_duplex
== ETH_LINK_FULL_DUPLEX
) {
1454 if (link
.link_speed
== ETH_LINK_SPEED_10
) {
1455 *current
= NETDEV_F_10MB_FD
;
1457 if (link
.link_speed
== ETH_LINK_SPEED_100
) {
1458 *current
= NETDEV_F_100MB_FD
;
1460 if (link
.link_speed
== ETH_LINK_SPEED_1000
) {
1461 *current
= NETDEV_F_1GB_FD
;
1463 if (link
.link_speed
== ETH_LINK_SPEED_10000
) {
1464 *current
= NETDEV_F_10GB_FD
;
1472 netdev_dpdk_get_ifindex(const struct netdev
*netdev
)
1474 struct netdev_dpdk
*dev
= netdev_dpdk_cast(netdev
);
1477 ovs_mutex_lock(&dev
->mutex
);
1478 ifindex
= dev
->port_id
;
1479 ovs_mutex_unlock(&dev
->mutex
);
1485 netdev_dpdk_get_carrier(const struct netdev
*netdev_
, bool *carrier
)
1487 struct netdev_dpdk
*dev
= netdev_dpdk_cast(netdev_
);
1489 ovs_mutex_lock(&dev
->mutex
);
1490 check_link_status(dev
);
1491 *carrier
= dev
->link
.link_status
;
1493 ovs_mutex_unlock(&dev
->mutex
);
1499 netdev_dpdk_vhost_get_carrier(const struct netdev
*netdev_
, bool *carrier
)
1501 struct netdev_dpdk
*dev
= netdev_dpdk_cast(netdev_
);
1502 struct virtio_net
*virtio_dev
= netdev_dpdk_get_virtio(dev
);
1504 ovs_mutex_lock(&dev
->mutex
);
1506 if (is_vhost_running(virtio_dev
)) {
1512 ovs_mutex_unlock(&dev
->mutex
);
1517 static long long int
1518 netdev_dpdk_get_carrier_resets(const struct netdev
*netdev_
)
1520 struct netdev_dpdk
*dev
= netdev_dpdk_cast(netdev_
);
1521 long long int carrier_resets
;
1523 ovs_mutex_lock(&dev
->mutex
);
1524 carrier_resets
= dev
->link_reset_cnt
;
1525 ovs_mutex_unlock(&dev
->mutex
);
1527 return carrier_resets
;
1531 netdev_dpdk_set_miimon(struct netdev
*netdev_ OVS_UNUSED
,
1532 long long int interval OVS_UNUSED
)
1538 netdev_dpdk_update_flags__(struct netdev_dpdk
*dev
,
1539 enum netdev_flags off
, enum netdev_flags on
,
1540 enum netdev_flags
*old_flagsp
) OVS_REQUIRES(dev
->mutex
)
1544 if ((off
| on
) & ~(NETDEV_UP
| NETDEV_PROMISC
)) {
1548 *old_flagsp
= dev
->flags
;
1552 if (dev
->flags
== *old_flagsp
) {
1556 if (dev
->type
== DPDK_DEV_ETH
) {
1557 if (dev
->flags
& NETDEV_UP
) {
1558 err
= rte_eth_dev_start(dev
->port_id
);
1563 if (dev
->flags
& NETDEV_PROMISC
) {
1564 rte_eth_promiscuous_enable(dev
->port_id
);
1567 if (!(dev
->flags
& NETDEV_UP
)) {
1568 rte_eth_dev_stop(dev
->port_id
);
1576 netdev_dpdk_update_flags(struct netdev
*netdev_
,
1577 enum netdev_flags off
, enum netdev_flags on
,
1578 enum netdev_flags
*old_flagsp
)
1580 struct netdev_dpdk
*netdev
= netdev_dpdk_cast(netdev_
);
1583 ovs_mutex_lock(&netdev
->mutex
);
1584 error
= netdev_dpdk_update_flags__(netdev
, off
, on
, old_flagsp
);
1585 ovs_mutex_unlock(&netdev
->mutex
);
1591 netdev_dpdk_get_status(const struct netdev
*netdev_
, struct smap
*args
)
1593 struct netdev_dpdk
*dev
= netdev_dpdk_cast(netdev_
);
1594 struct rte_eth_dev_info dev_info
;
1596 if (dev
->port_id
< 0)
1599 ovs_mutex_lock(&dev
->mutex
);
1600 rte_eth_dev_info_get(dev
->port_id
, &dev_info
);
1601 ovs_mutex_unlock(&dev
->mutex
);
1603 smap_add_format(args
, "driver_name", "%s", dev_info
.driver_name
);
1605 smap_add_format(args
, "port_no", "%d", dev
->port_id
);
1606 smap_add_format(args
, "numa_id", "%d", rte_eth_dev_socket_id(dev
->port_id
));
1607 smap_add_format(args
, "driver_name", "%s", dev_info
.driver_name
);
1608 smap_add_format(args
, "min_rx_bufsize", "%u", dev_info
.min_rx_bufsize
);
1609 smap_add_format(args
, "max_rx_pktlen", "%u", dev_info
.max_rx_pktlen
);
1610 smap_add_format(args
, "max_rx_queues", "%u", dev_info
.max_rx_queues
);
1611 smap_add_format(args
, "max_tx_queues", "%u", dev_info
.max_tx_queues
);
1612 smap_add_format(args
, "max_mac_addrs", "%u", dev_info
.max_mac_addrs
);
1613 smap_add_format(args
, "max_hash_mac_addrs", "%u", dev_info
.max_hash_mac_addrs
);
1614 smap_add_format(args
, "max_vfs", "%u", dev_info
.max_vfs
);
1615 smap_add_format(args
, "max_vmdq_pools", "%u", dev_info
.max_vmdq_pools
);
1617 smap_add_format(args
, "pci-vendor_id", "0x%u", dev_info
.pci_dev
->id
.vendor_id
);
1618 smap_add_format(args
, "pci-device_id", "0x%x", dev_info
.pci_dev
->id
.device_id
);
1624 netdev_dpdk_set_admin_state__(struct netdev_dpdk
*dev
, bool admin_state
)
1625 OVS_REQUIRES(dev
->mutex
)
1627 enum netdev_flags old_flags
;
1630 netdev_dpdk_update_flags__(dev
, 0, NETDEV_UP
, &old_flags
);
1632 netdev_dpdk_update_flags__(dev
, NETDEV_UP
, 0, &old_flags
);
1637 netdev_dpdk_set_admin_state(struct unixctl_conn
*conn
, int argc
,
1638 const char *argv
[], void *aux OVS_UNUSED
)
1642 if (!strcasecmp(argv
[argc
- 1], "up")) {
1644 } else if ( !strcasecmp(argv
[argc
- 1], "down")) {
1647 unixctl_command_reply_error(conn
, "Invalid Admin State");
1652 struct netdev
*netdev
= netdev_from_name(argv
[1]);
1653 if (netdev
&& is_dpdk_class(netdev
->netdev_class
)) {
1654 struct netdev_dpdk
*dpdk_dev
= netdev_dpdk_cast(netdev
);
1656 ovs_mutex_lock(&dpdk_dev
->mutex
);
1657 netdev_dpdk_set_admin_state__(dpdk_dev
, up
);
1658 ovs_mutex_unlock(&dpdk_dev
->mutex
);
1660 netdev_close(netdev
);
1662 unixctl_command_reply_error(conn
, "Not a DPDK Interface");
1663 netdev_close(netdev
);
1667 struct netdev_dpdk
*netdev
;
1669 ovs_mutex_lock(&dpdk_mutex
);
1670 LIST_FOR_EACH (netdev
, list_node
, &dpdk_list
) {
1671 ovs_mutex_lock(&netdev
->mutex
);
1672 netdev_dpdk_set_admin_state__(netdev
, up
);
1673 ovs_mutex_unlock(&netdev
->mutex
);
1675 ovs_mutex_unlock(&dpdk_mutex
);
1677 unixctl_command_reply(conn
, "OK");
1681 * Set virtqueue flags so that we do not receive interrupts.
1684 set_irq_status(struct virtio_net
*dev
)
1686 dev
->virtqueue
[VIRTIO_RXQ
]->used
->flags
= VRING_USED_F_NO_NOTIFY
;
1687 dev
->virtqueue
[VIRTIO_TXQ
]->used
->flags
= VRING_USED_F_NO_NOTIFY
;
1691 * A new virtio-net device is added to a vhost port.
1694 new_device(struct virtio_net
*dev
)
1696 struct netdev_dpdk
*netdev
;
1697 bool exists
= false;
1699 ovs_mutex_lock(&dpdk_mutex
);
1700 /* Add device to the vhost port with the same name as that passed down. */
1701 LIST_FOR_EACH(netdev
, list_node
, &dpdk_list
) {
1702 if (strncmp(dev
->ifname
, netdev
->vhost_id
, IF_NAME_SZ
) == 0) {
1703 ovs_mutex_lock(&netdev
->mutex
);
1704 ovsrcu_set(&netdev
->virtio_dev
, dev
);
1705 ovs_mutex_unlock(&netdev
->mutex
);
1707 dev
->flags
|= VIRTIO_DEV_RUNNING
;
1708 /* Disable notifications. */
1709 set_irq_status(dev
);
1713 ovs_mutex_unlock(&dpdk_mutex
);
1716 VLOG_INFO("vHost Device '%s' (%ld) can't be added - name not found",
1717 dev
->ifname
, dev
->device_fh
);
1722 VLOG_INFO("vHost Device '%s' (%ld) has been added",
1723 dev
->ifname
, dev
->device_fh
);
1728 * Remove a virtio-net device from the specific vhost port. Use dev->remove
1729 * flag to stop any more packets from being sent or received to/from a VM and
1730 * ensure all currently queued packets have been sent/received before removing
1734 destroy_device(volatile struct virtio_net
*dev
)
1736 struct netdev_dpdk
*vhost_dev
;
1738 ovs_mutex_lock(&dpdk_mutex
);
1739 LIST_FOR_EACH (vhost_dev
, list_node
, &dpdk_list
) {
1740 if (netdev_dpdk_get_virtio(vhost_dev
) == dev
) {
1742 ovs_mutex_lock(&vhost_dev
->mutex
);
1743 dev
->flags
&= ~VIRTIO_DEV_RUNNING
;
1744 ovsrcu_set(&vhost_dev
->virtio_dev
, NULL
);
1745 ovs_mutex_unlock(&vhost_dev
->mutex
);
1748 * Wait for other threads to quiesce before
1749 * setting the virtio_dev to NULL.
1751 ovsrcu_synchronize();
1753 * As call to ovsrcu_synchronize() will end the quiescent state,
1754 * put thread back into quiescent state before returning.
1756 ovsrcu_quiesce_start();
1759 ovs_mutex_unlock(&dpdk_mutex
);
1761 VLOG_INFO("vHost Device '%s' (%ld) has been removed",
1762 dev
->ifname
, dev
->device_fh
);
1766 netdev_dpdk_get_virtio(const struct netdev_dpdk
*dev
)
1768 return ovsrcu_get(struct virtio_net
*, &dev
->virtio_dev
);
1772 * These callbacks allow virtio-net devices to be added to vhost ports when
1773 * configuration has been fully complete.
1775 static const struct virtio_net_device_ops virtio_net_device_ops
=
1777 .new_device
= new_device
,
1778 .destroy_device
= destroy_device
,
1782 start_vhost_loop(void *dummy OVS_UNUSED
)
1784 pthread_detach(pthread_self());
1785 /* Put the cuse thread into quiescent state. */
1786 ovsrcu_quiesce_start();
1787 rte_vhost_driver_session_start();
1792 dpdk_vhost_class_init(void)
1794 rte_vhost_driver_callback_register(&virtio_net_device_ops
);
1795 ovs_thread_create("vhost_thread", start_vhost_loop
, NULL
);
1800 dpdk_vhost_cuse_class_init(void)
1805 /* Register CUSE device to handle IOCTLs.
1806 * Unless otherwise specified on the vswitchd command line, cuse_dev_name
1807 * is set to vhost-net.
1809 err
= rte_vhost_driver_register(cuse_dev_name
);
1812 VLOG_ERR("CUSE device setup failure.");
1816 dpdk_vhost_class_init();
1821 dpdk_vhost_user_class_init(void)
1823 dpdk_vhost_class_init();
1828 dpdk_common_init(void)
1830 unixctl_command_register("netdev-dpdk/set-admin-state",
1831 "[netdev] up|down", 1, 2,
1832 netdev_dpdk_set_admin_state
, NULL
);
1834 ovs_thread_create("dpdk_watchdog", dpdk_watchdog
, NULL
);
1840 dpdk_ring_create(const char dev_name
[], unsigned int port_no
,
1841 unsigned int *eth_port_id
)
1843 struct dpdk_ring
*ivshmem
;
1847 ivshmem
= dpdk_rte_mzalloc(sizeof *ivshmem
);
1848 if (ivshmem
== NULL
) {
1852 /* XXX: Add support for multiquque ring. */
1853 err
= snprintf(ring_name
, 10, "%s_tx", dev_name
);
1858 /* Create single consumer/producer rings, netdev does explicit locking. */
1859 ivshmem
->cring_tx
= rte_ring_create(ring_name
, DPDK_RING_SIZE
, SOCKET0
,
1860 RING_F_SP_ENQ
| RING_F_SC_DEQ
);
1861 if (ivshmem
->cring_tx
== NULL
) {
1866 err
= snprintf(ring_name
, 10, "%s_rx", dev_name
);
1871 /* Create single consumer/producer rings, netdev does explicit locking. */
1872 ivshmem
->cring_rx
= rte_ring_create(ring_name
, DPDK_RING_SIZE
, SOCKET0
,
1873 RING_F_SP_ENQ
| RING_F_SC_DEQ
);
1874 if (ivshmem
->cring_rx
== NULL
) {
1879 err
= rte_eth_from_rings(dev_name
, &ivshmem
->cring_rx
, 1,
1880 &ivshmem
->cring_tx
, 1, SOCKET0
);
1887 ivshmem
->user_port_id
= port_no
;
1888 ivshmem
->eth_port_id
= rte_eth_dev_count() - 1;
1889 list_push_back(&dpdk_ring_list
, &ivshmem
->list_node
);
1891 *eth_port_id
= ivshmem
->eth_port_id
;
1896 dpdk_ring_open(const char dev_name
[], unsigned int *eth_port_id
) OVS_REQUIRES(dpdk_mutex
)
1898 struct dpdk_ring
*ivshmem
;
1899 unsigned int port_no
;
1902 /* Names always start with "dpdkr" */
1903 err
= dpdk_dev_parse_name(dev_name
, "dpdkr", &port_no
);
1908 /* look through our list to find the device */
1909 LIST_FOR_EACH (ivshmem
, list_node
, &dpdk_ring_list
) {
1910 if (ivshmem
->user_port_id
== port_no
) {
1911 VLOG_INFO("Found dpdk ring device %s:", dev_name
);
1912 *eth_port_id
= ivshmem
->eth_port_id
; /* really all that is needed */
1916 /* Need to create the device rings */
1917 return dpdk_ring_create(dev_name
, port_no
, eth_port_id
);
1921 netdev_dpdk_ring_send(struct netdev
*netdev_
, int qid
,
1922 struct dp_packet
**pkts
, int cnt
, bool may_steal
)
1924 struct netdev_dpdk
*netdev
= netdev_dpdk_cast(netdev_
);
1927 /* When using 'dpdkr' and sending to a DPDK ring, we want to ensure that the
1928 * rss hash field is clear. This is because the same mbuf may be modified by
1929 * the consumer of the ring and return into the datapath without recalculating
1931 for (i
= 0; i
< cnt
; i
++) {
1932 dp_packet_set_rss_hash(pkts
[i
], 0);
1935 netdev_dpdk_send__(netdev
, qid
, pkts
, cnt
, may_steal
);
1940 netdev_dpdk_ring_construct(struct netdev
*netdev
)
1942 unsigned int port_no
= 0;
1945 if (rte_eal_init_ret
) {
1946 return rte_eal_init_ret
;
1949 ovs_mutex_lock(&dpdk_mutex
);
1951 err
= dpdk_ring_open(netdev
->name
, &port_no
);
1956 err
= netdev_dpdk_init(netdev
, port_no
, DPDK_DEV_ETH
);
1959 ovs_mutex_unlock(&dpdk_mutex
);
1963 #define NETDEV_DPDK_CLASS(NAME, INIT, CONSTRUCT, DESTRUCT, MULTIQ, SEND, \
1964 GET_CARRIER, GET_STATS, GET_FEATURES, GET_STATUS, RXQ_RECV) \
1968 NULL, /* netdev_dpdk_run */ \
1969 NULL, /* netdev_dpdk_wait */ \
1971 netdev_dpdk_alloc, \
1974 netdev_dpdk_dealloc, \
1975 netdev_dpdk_get_config, \
1976 NULL, /* netdev_dpdk_set_config */ \
1977 NULL, /* get_tunnel_config */ \
1978 NULL, /* build header */ \
1979 NULL, /* push header */ \
1980 NULL, /* pop header */ \
1981 netdev_dpdk_get_numa_id, /* get_numa_id */ \
1982 MULTIQ, /* set_multiq */ \
1985 NULL, /* send_wait */ \
1987 netdev_dpdk_set_etheraddr, \
1988 netdev_dpdk_get_etheraddr, \
1989 netdev_dpdk_get_mtu, \
1990 netdev_dpdk_set_mtu, \
1991 netdev_dpdk_get_ifindex, \
1993 netdev_dpdk_get_carrier_resets, \
1994 netdev_dpdk_set_miimon, \
1997 NULL, /* set_advertisements */ \
1999 NULL, /* set_policing */ \
2000 NULL, /* get_qos_types */ \
2001 NULL, /* get_qos_capabilities */ \
2002 NULL, /* get_qos */ \
2003 NULL, /* set_qos */ \
2004 NULL, /* get_queue */ \
2005 NULL, /* set_queue */ \
2006 NULL, /* delete_queue */ \
2007 NULL, /* get_queue_stats */ \
2008 NULL, /* queue_dump_start */ \
2009 NULL, /* queue_dump_next */ \
2010 NULL, /* queue_dump_done */ \
2011 NULL, /* dump_queue_stats */ \
2013 NULL, /* get_in4 */ \
2014 NULL, /* set_in4 */ \
2015 NULL, /* get_in6 */ \
2016 NULL, /* add_router */ \
2017 NULL, /* get_next_hop */ \
2019 NULL, /* arp_lookup */ \
2021 netdev_dpdk_update_flags, \
2023 netdev_dpdk_rxq_alloc, \
2024 netdev_dpdk_rxq_construct, \
2025 netdev_dpdk_rxq_destruct, \
2026 netdev_dpdk_rxq_dealloc, \
2028 NULL, /* rx_wait */ \
2029 NULL, /* rxq_drain */ \
2033 process_vhost_flags(char *flag
, char *default_val
, int size
,
2034 char **argv
, char **new_val
)
2038 /* Depending on which version of vhost is in use, process the vhost-specific
2039 * flag if it is provided on the vswitchd command line, otherwise resort to
2042 * For vhost-user: Process "-cuse_dev_name" to set the custom location of
2043 * the vhost-user socket(s).
2044 * For vhost-cuse: Process "-vhost_sock_dir" to set the custom name of the
2045 * vhost-cuse character device.
2047 if (!strcmp(argv
[1], flag
) && (strlen(argv
[2]) <= size
)) {
2049 *new_val
= strdup(argv
[2]);
2050 VLOG_INFO("User-provided %s in use: %s", flag
, *new_val
);
2052 VLOG_INFO("No %s provided - defaulting to %s", flag
, default_val
);
2053 *new_val
= default_val
;
2060 dpdk_init(int argc
, char **argv
)
2064 char *pragram_name
= argv
[0];
2066 if (argc
< 2 || strcmp(argv
[1], "--dpdk"))
2069 /* Remove the --dpdk argument from arg list.*/
2074 if (process_vhost_flags("-cuse_dev_name", strdup("vhost-net"),
2075 PATH_MAX
, argv
, &cuse_dev_name
)) {
2077 if (process_vhost_flags("-vhost_sock_dir", strdup(ovs_rundir()),
2078 NAME_MAX
, argv
, &vhost_sock_dir
)) {
2082 err
= stat(vhost_sock_dir
, &s
);
2084 VLOG_ERR("vHostUser socket DIR '%s' does not exist.",
2089 /* Remove the vhost flag configuration parameters from the argument
2090 * list, so that the correct elements are passed to the DPDK
2091 * initialization function
2094 argv
+= 2; /* Increment by two to bypass the vhost flag arguments */
2098 /* Keep the program name argument as this is needed for call to
2101 argv
[0] = pragram_name
;
2103 /* Make sure things are initialized ... */
2104 result
= rte_eal_init(argc
, argv
);
2106 ovs_abort(result
, "Cannot init EAL");
2109 rte_memzone_dump(stdout
);
2110 rte_eal_init_ret
= 0;
2112 if (argc
> result
) {
2113 argv
[result
] = argv
[0];
2116 /* We are called from the main thread here */
2117 RTE_PER_LCORE(_lcore_id
) = NON_PMD_CORE_ID
;
2119 return result
+ 1 + base
;
2122 static const struct netdev_class dpdk_class
=
2126 netdev_dpdk_construct
,
2127 netdev_dpdk_destruct
,
2128 netdev_dpdk_set_multiq
,
2129 netdev_dpdk_eth_send
,
2130 netdev_dpdk_get_carrier
,
2131 netdev_dpdk_get_stats
,
2132 netdev_dpdk_get_features
,
2133 netdev_dpdk_get_status
,
2134 netdev_dpdk_rxq_recv
);
2136 static const struct netdev_class dpdk_ring_class
=
2140 netdev_dpdk_ring_construct
,
2141 netdev_dpdk_destruct
,
2142 netdev_dpdk_set_multiq
,
2143 netdev_dpdk_ring_send
,
2144 netdev_dpdk_get_carrier
,
2145 netdev_dpdk_get_stats
,
2146 netdev_dpdk_get_features
,
2147 netdev_dpdk_get_status
,
2148 netdev_dpdk_rxq_recv
);
2150 static const struct netdev_class OVS_UNUSED dpdk_vhost_cuse_class
=
2153 dpdk_vhost_cuse_class_init
,
2154 netdev_dpdk_vhost_cuse_construct
,
2155 netdev_dpdk_vhost_destruct
,
2156 netdev_dpdk_vhost_set_multiq
,
2157 netdev_dpdk_vhost_send
,
2158 netdev_dpdk_vhost_get_carrier
,
2159 netdev_dpdk_vhost_get_stats
,
2162 netdev_dpdk_vhost_rxq_recv
);
2164 static const struct netdev_class OVS_UNUSED dpdk_vhost_user_class
=
2167 dpdk_vhost_user_class_init
,
2168 netdev_dpdk_vhost_user_construct
,
2169 netdev_dpdk_vhost_destruct
,
2170 netdev_dpdk_vhost_set_multiq
,
2171 netdev_dpdk_vhost_send
,
2172 netdev_dpdk_vhost_get_carrier
,
2173 netdev_dpdk_vhost_get_stats
,
2176 netdev_dpdk_vhost_rxq_recv
);
2179 netdev_dpdk_register(void)
2181 static struct ovsthread_once once
= OVSTHREAD_ONCE_INITIALIZER
;
2183 if (rte_eal_init_ret
) {
2187 if (ovsthread_once_start(&once
)) {
2189 netdev_register_provider(&dpdk_class
);
2190 netdev_register_provider(&dpdk_ring_class
);
2192 netdev_register_provider(&dpdk_vhost_cuse_class
);
2194 netdev_register_provider(&dpdk_vhost_user_class
);
2196 ovsthread_once_done(&once
);
2201 pmd_thread_setaffinity_cpu(unsigned cpu
)
2207 CPU_SET(cpu
, &cpuset
);
2208 err
= pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t
), &cpuset
);
2210 VLOG_ERR("Thread affinity error %d",err
);
2213 /* NON_PMD_CORE_ID is reserved for use by non pmd threads. */
2214 ovs_assert(cpu
!= NON_PMD_CORE_ID
);
2215 RTE_PER_LCORE(_lcore_id
) = cpu
;
2223 return rte_lcore_id() != NON_PMD_CORE_ID
;