1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright 2018-2019 Cisco Systems, Inc. All rights reserved.
9 #include <sys/socket.h>
11 #include <sys/ioctl.h>
13 #include <linux/if_ether.h>
15 #include <sys/eventfd.h>
17 #include <rte_version.h>
19 #include <rte_ether.h>
20 #include <ethdev_driver.h>
21 #include <ethdev_vdev.h>
22 #include <rte_malloc.h>
23 #include <rte_kvargs.h>
24 #include <rte_bus_vdev.h>
25 #include <rte_string_fns.h>
26 #include <rte_errno.h>
27 #include <rte_memory.h>
28 #include <rte_memzone.h>
29 #include <rte_eal_memconfig.h>
31 #include "rte_eth_memif.h"
32 #include "memif_socket.h"
34 #define ETH_MEMIF_ID_ARG "id"
35 #define ETH_MEMIF_ROLE_ARG "role"
36 #define ETH_MEMIF_PKT_BUFFER_SIZE_ARG "bsize"
37 #define ETH_MEMIF_RING_SIZE_ARG "rsize"
38 #define ETH_MEMIF_SOCKET_ARG "socket"
39 #define ETH_MEMIF_SOCKET_ABSTRACT_ARG "socket-abstract"
40 #define ETH_MEMIF_MAC_ARG "mac"
41 #define ETH_MEMIF_ZC_ARG "zero-copy"
42 #define ETH_MEMIF_SECRET_ARG "secret"
44 static const char * const valid_arguments[] = {
47 ETH_MEMIF_PKT_BUFFER_SIZE_ARG,
48 ETH_MEMIF_RING_SIZE_ARG,
50 ETH_MEMIF_SOCKET_ABSTRACT_ARG,
57 static const struct rte_eth_link pmd_link = {
58 .link_speed = ETH_SPEED_NUM_10G,
59 .link_duplex = ETH_LINK_FULL_DUPLEX,
60 .link_status = ETH_LINK_DOWN,
61 .link_autoneg = ETH_LINK_AUTONEG
64 #define MEMIF_MP_SEND_REGION "memif_mp_send_region"
67 static int memif_region_init_zc(const struct rte_memseg_list *msl,
68 const struct rte_memseg *ms, void *arg);
73 return ("memif-" RTE_STR(MEMIF_VERSION_MAJOR) "." RTE_STR(MEMIF_VERSION_MINOR));
76 /* Message header to synchronize regions */
77 struct mp_region_msg {
78 char port_name[RTE_DEV_NAME_MAX_LEN];
79 memif_region_index_t idx;
80 memif_region_size_t size;
84 memif_mp_send_region(const struct rte_mp_msg *msg, const void *peer)
86 struct rte_eth_dev *dev;
87 struct pmd_process_private *proc_private;
88 const struct mp_region_msg *msg_param = (const struct mp_region_msg *)msg->param;
89 struct rte_mp_msg reply;
90 struct mp_region_msg *reply_param = (struct mp_region_msg *)reply.param;
94 /* Get requested port */
95 ret = rte_eth_dev_get_port_by_name(msg_param->port_name, &port_id);
97 MIF_LOG(ERR, "Failed to get port id for %s",
98 msg_param->port_name);
101 dev = &rte_eth_devices[port_id];
102 proc_private = dev->process_private;
104 memset(&reply, 0, sizeof(reply));
105 strlcpy(reply.name, msg->name, sizeof(reply.name));
106 reply_param->idx = msg_param->idx;
107 if (proc_private->regions[msg_param->idx] != NULL) {
108 reply_param->size = proc_private->regions[msg_param->idx]->region_size;
109 reply.fds[0] = proc_private->regions[msg_param->idx]->fd;
112 reply.len_param = sizeof(*reply_param);
113 if (rte_mp_reply(&reply, peer) < 0) {
114 MIF_LOG(ERR, "Failed to reply to an add region request");
123 * Called by secondary process, when ports link status goes up.
126 memif_mp_request_regions(struct rte_eth_dev *dev)
129 struct timespec timeout = {.tv_sec = 5, .tv_nsec = 0};
130 struct rte_mp_msg msg, *reply;
131 struct rte_mp_reply replies;
132 struct mp_region_msg *msg_param = (struct mp_region_msg *)msg.param;
133 struct mp_region_msg *reply_param;
134 struct memif_region *r;
135 struct pmd_process_private *proc_private = dev->process_private;
136 struct pmd_internals *pmd = dev->data->dev_private;
137 /* in case of zero-copy client, only request region 0 */
138 uint16_t max_region_num = (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) ?
139 1 : ETH_MEMIF_MAX_REGION_NUM;
141 MIF_LOG(DEBUG, "Requesting memory regions");
143 for (i = 0; i < max_region_num; i++) {
144 /* Prepare the message */
145 memset(&msg, 0, sizeof(msg));
146 strlcpy(msg.name, MEMIF_MP_SEND_REGION, sizeof(msg.name));
147 strlcpy(msg_param->port_name, dev->data->name,
148 sizeof(msg_param->port_name));
150 msg.len_param = sizeof(*msg_param);
153 ret = rte_mp_request_sync(&msg, &replies, &timeout);
154 if (ret < 0 || replies.nb_received != 1) {
155 MIF_LOG(ERR, "Failed to send mp msg: %d",
160 reply = &replies.msgs[0];
161 reply_param = (struct mp_region_msg *)reply->param;
163 if (reply_param->size > 0) {
164 r = rte_zmalloc("region", sizeof(struct memif_region), 0);
166 MIF_LOG(ERR, "Failed to alloc memif region.");
170 r->region_size = reply_param->size;
171 if (reply->num_fds < 1) {
172 MIF_LOG(ERR, "Missing file descriptor.");
176 r->fd = reply->fds[0];
179 proc_private->regions[reply_param->idx] = r;
180 proc_private->regions_num++;
185 if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) {
186 ret = rte_memseg_walk(memif_region_init_zc, (void *)proc_private);
191 return memif_connect(dev);
195 memif_dev_info(struct rte_eth_dev *dev __rte_unused, struct rte_eth_dev_info *dev_info)
197 dev_info->max_mac_addrs = 1;
198 dev_info->max_rx_pktlen = (uint32_t)ETH_FRAME_LEN;
199 dev_info->max_rx_queues = ETH_MEMIF_MAX_NUM_Q_PAIRS;
200 dev_info->max_tx_queues = ETH_MEMIF_MAX_NUM_Q_PAIRS;
201 dev_info->min_rx_bufsize = 0;
206 static memif_ring_t *
207 memif_get_ring(struct pmd_internals *pmd, struct pmd_process_private *proc_private,
208 memif_ring_type_t type, uint16_t ring_num)
210 /* rings only in region 0 */
211 void *p = proc_private->regions[0]->addr;
212 int ring_size = sizeof(memif_ring_t) + sizeof(memif_desc_t) *
213 (1 << pmd->run.log2_ring_size);
215 p = (uint8_t *)p + (ring_num + type * pmd->run.num_c2s_rings) * ring_size;
217 return (memif_ring_t *)p;
220 static memif_region_offset_t
221 memif_get_ring_offset(struct rte_eth_dev *dev, struct memif_queue *mq,
222 memif_ring_type_t type, uint16_t num)
224 struct pmd_internals *pmd = dev->data->dev_private;
225 struct pmd_process_private *proc_private = dev->process_private;
227 return ((uint8_t *)memif_get_ring(pmd, proc_private, type, num) -
228 (uint8_t *)proc_private->regions[mq->region]->addr);
231 static memif_ring_t *
232 memif_get_ring_from_queue(struct pmd_process_private *proc_private,
233 struct memif_queue *mq)
235 struct memif_region *r;
237 r = proc_private->regions[mq->region];
241 return (memif_ring_t *)((uint8_t *)r->addr + mq->ring_offset);
245 memif_get_buffer(struct pmd_process_private *proc_private, memif_desc_t *d)
247 return ((uint8_t *)proc_private->regions[d->region]->addr + d->offset);
250 /* Free mbufs received by server */
252 memif_free_stored_mbufs(struct pmd_process_private *proc_private, struct memif_queue *mq)
255 uint16_t mask = (1 << mq->log2_ring_size) - 1;
256 memif_ring_t *ring = memif_get_ring_from_queue(proc_private, mq);
258 /* FIXME: improve performance */
259 /* The ring->tail acts as a guard variable between Tx and Rx
260 * threads, so using load-acquire pairs with store-release
261 * in function eth_memif_rx for C2S queues.
263 cur_tail = __atomic_load_n(&ring->tail, __ATOMIC_ACQUIRE);
264 while (mq->last_tail != cur_tail) {
265 RTE_MBUF_PREFETCH_TO_FREE(mq->buffers[(mq->last_tail + 1) & mask]);
266 /* Decrement refcnt and free mbuf. (current segment) */
267 rte_mbuf_refcnt_update(mq->buffers[mq->last_tail & mask], -1);
268 rte_pktmbuf_free_seg(mq->buffers[mq->last_tail & mask]);
274 memif_pktmbuf_chain(struct rte_mbuf *head, struct rte_mbuf *cur_tail,
275 struct rte_mbuf *tail)
277 /* Check for number-of-segments-overflow */
278 if (unlikely(head->nb_segs + tail->nb_segs > RTE_MBUF_MAX_NB_SEGS))
281 /* Chain 'tail' onto the old tail */
282 cur_tail->next = tail;
284 /* accumulate number of segments and total length. */
285 head->nb_segs = (uint16_t)(head->nb_segs + tail->nb_segs);
287 tail->pkt_len = tail->data_len;
288 head->pkt_len += tail->pkt_len;
294 eth_memif_rx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
296 struct memif_queue *mq = queue;
297 struct pmd_internals *pmd = rte_eth_devices[mq->in_port].data->dev_private;
298 struct pmd_process_private *proc_private =
299 rte_eth_devices[mq->in_port].process_private;
300 memif_ring_t *ring = memif_get_ring_from_queue(proc_private, mq);
301 uint16_t cur_slot, last_slot, n_slots, ring_size, mask, s0;
302 uint16_t n_rx_pkts = 0;
303 uint16_t mbuf_size = rte_pktmbuf_data_room_size(mq->mempool) -
304 RTE_PKTMBUF_HEADROOM;
305 uint16_t src_len, src_off, dst_len, dst_off, cp_len;
306 memif_ring_type_t type = mq->type;
308 struct rte_mbuf *mbuf, *mbuf_head, *mbuf_tail;
310 ssize_t size __rte_unused;
313 struct rte_eth_link link;
315 if (unlikely((pmd->flags & ETH_MEMIF_FLAG_CONNECTED) == 0))
317 if (unlikely(ring == NULL)) {
318 /* Secondary process will attempt to request regions. */
319 ret = rte_eth_link_get(mq->in_port, &link);
321 MIF_LOG(ERR, "Failed to get port %u link info: %s",
322 mq->in_port, rte_strerror(-ret));
326 /* consume interrupt */
327 if ((ring->flags & MEMIF_RING_FLAG_MASK_INT) == 0)
328 size = read(mq->intr_handle.fd, &b, sizeof(b));
330 ring_size = 1 << mq->log2_ring_size;
331 mask = ring_size - 1;
333 if (type == MEMIF_RING_C2S) {
334 cur_slot = mq->last_head;
335 last_slot = __atomic_load_n(&ring->head, __ATOMIC_ACQUIRE);
337 cur_slot = mq->last_tail;
338 last_slot = __atomic_load_n(&ring->tail, __ATOMIC_ACQUIRE);
341 if (cur_slot == last_slot)
343 n_slots = last_slot - cur_slot;
345 while (n_slots && n_rx_pkts < nb_pkts) {
346 mbuf_head = rte_pktmbuf_alloc(mq->mempool);
347 if (unlikely(mbuf_head == NULL))
350 mbuf->port = mq->in_port;
353 s0 = cur_slot & mask;
354 d0 = &ring->desc[s0];
356 src_len = d0->length;
361 dst_len = mbuf_size - dst_off;
366 /* store pointer to tail */
368 mbuf = rte_pktmbuf_alloc(mq->mempool);
369 if (unlikely(mbuf == NULL))
371 mbuf->port = mq->in_port;
372 ret = memif_pktmbuf_chain(mbuf_head, mbuf_tail, mbuf);
373 if (unlikely(ret < 0)) {
374 MIF_LOG(ERR, "number-of-segments-overflow");
375 rte_pktmbuf_free(mbuf);
379 cp_len = RTE_MIN(dst_len, src_len);
381 rte_pktmbuf_data_len(mbuf) += cp_len;
382 rte_pktmbuf_pkt_len(mbuf) = rte_pktmbuf_data_len(mbuf);
383 if (mbuf != mbuf_head)
384 rte_pktmbuf_pkt_len(mbuf_head) += cp_len;
386 rte_memcpy(rte_pktmbuf_mtod_offset(mbuf, void *,
388 (uint8_t *)memif_get_buffer(proc_private, d0) +
399 if (d0->flags & MEMIF_DESC_FLAG_NEXT)
402 mq->n_bytes += rte_pktmbuf_pkt_len(mbuf_head);
408 if (type == MEMIF_RING_C2S) {
409 __atomic_store_n(&ring->tail, cur_slot, __ATOMIC_RELEASE);
410 mq->last_head = cur_slot;
412 mq->last_tail = cur_slot;
416 if (type == MEMIF_RING_S2C) {
417 /* ring->head is updated by the receiver and this function
418 * is called in the context of receiver thread. The loads in
419 * the receiver do not need to synchronize with its own stores.
421 head = __atomic_load_n(&ring->head, __ATOMIC_RELAXED);
422 n_slots = ring_size - head + mq->last_tail;
426 d0 = &ring->desc[s0];
427 d0->length = pmd->run.pkt_buffer_size;
429 __atomic_store_n(&ring->head, head, __ATOMIC_RELEASE);
432 mq->n_pkts += n_rx_pkts;
437 eth_memif_rx_zc(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
439 struct memif_queue *mq = queue;
440 struct pmd_internals *pmd = rte_eth_devices[mq->in_port].data->dev_private;
441 struct pmd_process_private *proc_private =
442 rte_eth_devices[mq->in_port].process_private;
443 memif_ring_t *ring = memif_get_ring_from_queue(proc_private, mq);
444 uint16_t cur_slot, last_slot, n_slots, ring_size, mask, s0, head;
445 uint16_t n_rx_pkts = 0;
447 struct rte_mbuf *mbuf, *mbuf_tail;
448 struct rte_mbuf *mbuf_head = NULL;
450 struct rte_eth_link link;
452 if (unlikely((pmd->flags & ETH_MEMIF_FLAG_CONNECTED) == 0))
454 if (unlikely(ring == NULL)) {
455 /* Secondary process will attempt to request regions. */
456 rte_eth_link_get(mq->in_port, &link);
460 /* consume interrupt */
461 if ((ring->flags & MEMIF_RING_FLAG_MASK_INT) == 0) {
463 ssize_t size __rte_unused;
464 size = read(mq->intr_handle.fd, &b, sizeof(b));
467 ring_size = 1 << mq->log2_ring_size;
468 mask = ring_size - 1;
470 cur_slot = mq->last_tail;
471 /* The ring->tail acts as a guard variable between Tx and Rx
472 * threads, so using load-acquire pairs with store-release
473 * to synchronize it between threads.
475 last_slot = __atomic_load_n(&ring->tail, __ATOMIC_ACQUIRE);
476 if (cur_slot == last_slot)
478 n_slots = last_slot - cur_slot;
480 while (n_slots && n_rx_pkts < nb_pkts) {
481 s0 = cur_slot & mask;
483 d0 = &ring->desc[s0];
484 mbuf_head = mq->buffers[s0];
488 /* prefetch next descriptor */
489 if (n_rx_pkts + 1 < nb_pkts)
490 rte_prefetch0(&ring->desc[(cur_slot + 1) & mask]);
492 mbuf->port = mq->in_port;
493 rte_pktmbuf_data_len(mbuf) = d0->length;
494 rte_pktmbuf_pkt_len(mbuf) = rte_pktmbuf_data_len(mbuf);
496 mq->n_bytes += rte_pktmbuf_data_len(mbuf);
500 if (d0->flags & MEMIF_DESC_FLAG_NEXT) {
501 s0 = cur_slot & mask;
502 d0 = &ring->desc[s0];
504 mbuf = mq->buffers[s0];
505 ret = memif_pktmbuf_chain(mbuf_head, mbuf_tail, mbuf);
506 if (unlikely(ret < 0)) {
507 MIF_LOG(ERR, "number-of-segments-overflow");
517 mq->last_tail = cur_slot;
519 /* Supply server with new buffers */
521 /* ring->head is updated by the receiver and this function
522 * is called in the context of receiver thread. The loads in
523 * the receiver do not need to synchronize with its own stores.
525 head = __atomic_load_n(&ring->head, __ATOMIC_RELAXED);
526 n_slots = ring_size - head + mq->last_tail;
531 ret = rte_pktmbuf_alloc_bulk(mq->mempool, &mq->buffers[head & mask], n_slots);
532 if (unlikely(ret < 0))
538 rte_prefetch0(mq->buffers[head & mask]);
539 d0 = &ring->desc[s0];
540 /* store buffer header */
541 mbuf = mq->buffers[s0];
542 /* populate descriptor */
543 d0->length = rte_pktmbuf_data_room_size(mq->mempool) -
544 RTE_PKTMBUF_HEADROOM;
546 d0->offset = rte_pktmbuf_mtod(mbuf, uint8_t *) -
547 (uint8_t *)proc_private->regions[d0->region]->addr;
550 /* The ring->head acts as a guard variable between Tx and Rx
551 * threads, so using store-release pairs with load-acquire
552 * in function eth_memif_tx.
554 __atomic_store_n(&ring->head, head, __ATOMIC_RELEASE);
556 mq->n_pkts += n_rx_pkts;
562 eth_memif_tx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
564 struct memif_queue *mq = queue;
565 struct pmd_internals *pmd = rte_eth_devices[mq->in_port].data->dev_private;
566 struct pmd_process_private *proc_private =
567 rte_eth_devices[mq->in_port].process_private;
568 memif_ring_t *ring = memif_get_ring_from_queue(proc_private, mq);
569 uint16_t slot, saved_slot, n_free, ring_size, mask, n_tx_pkts = 0;
570 uint16_t src_len, src_off, dst_len, dst_off, cp_len;
571 memif_ring_type_t type = mq->type;
573 struct rte_mbuf *mbuf;
574 struct rte_mbuf *mbuf_head;
577 struct rte_eth_link link;
579 if (unlikely((pmd->flags & ETH_MEMIF_FLAG_CONNECTED) == 0))
581 if (unlikely(ring == NULL)) {
584 /* Secondary process will attempt to request regions. */
585 ret = rte_eth_link_get(mq->in_port, &link);
587 MIF_LOG(ERR, "Failed to get port %u link info: %s",
588 mq->in_port, rte_strerror(-ret));
592 ring_size = 1 << mq->log2_ring_size;
593 mask = ring_size - 1;
595 if (type == MEMIF_RING_C2S) {
596 /* For C2S queues ring->head is updated by the sender and
597 * this function is called in the context of sending thread.
598 * The loads in the sender do not need to synchronize with
599 * its own stores. Hence, the following load can be a
602 slot = __atomic_load_n(&ring->head, __ATOMIC_RELAXED);
603 n_free = ring_size - slot +
604 __atomic_load_n(&ring->tail, __ATOMIC_ACQUIRE);
606 /* For S2C queues ring->tail is updated by the sender and
607 * this function is called in the context of sending thread.
608 * The loads in the sender do not need to synchronize with
609 * its own stores. Hence, the following load can be a
612 slot = __atomic_load_n(&ring->tail, __ATOMIC_RELAXED);
613 n_free = __atomic_load_n(&ring->head, __ATOMIC_ACQUIRE) - slot;
616 while (n_tx_pkts < nb_pkts && n_free) {
621 d0 = &ring->desc[slot & mask];
623 dst_len = (type == MEMIF_RING_C2S) ?
624 pmd->run.pkt_buffer_size : d0->length;
628 src_len = rte_pktmbuf_data_len(mbuf);
635 d0->flags |= MEMIF_DESC_FLAG_NEXT;
636 d0 = &ring->desc[slot & mask];
638 dst_len = (type == MEMIF_RING_C2S) ?
639 pmd->run.pkt_buffer_size : d0->length;
646 cp_len = RTE_MIN(dst_len, src_len);
648 rte_memcpy((uint8_t *)memif_get_buffer(proc_private,
650 rte_pktmbuf_mtod_offset(mbuf, void *, src_off),
653 mq->n_bytes += cp_len;
659 d0->length = dst_off;
662 if (rte_pktmbuf_is_contiguous(mbuf) == 0) {
670 rte_pktmbuf_free(mbuf_head);
674 if (type == MEMIF_RING_C2S)
675 __atomic_store_n(&ring->head, slot, __ATOMIC_RELEASE);
677 __atomic_store_n(&ring->tail, slot, __ATOMIC_RELEASE);
679 if ((ring->flags & MEMIF_RING_FLAG_MASK_INT) == 0) {
681 size = write(mq->intr_handle.fd, &a, sizeof(a));
682 if (unlikely(size < 0)) {
684 "Failed to send interrupt. %s", strerror(errno));
688 mq->n_pkts += n_tx_pkts;
694 memif_tx_one_zc(struct pmd_process_private *proc_private, struct memif_queue *mq,
695 memif_ring_t *ring, struct rte_mbuf *mbuf, const uint16_t mask,
696 uint16_t slot, uint16_t n_free)
702 /* store pointer to mbuf to free it later */
703 mq->buffers[slot & mask] = mbuf;
704 /* Increment refcnt to make sure the buffer is not freed before server
705 * receives it. (current segment)
707 rte_mbuf_refcnt_update(mbuf, 1);
708 /* populate descriptor */
709 d0 = &ring->desc[slot & mask];
710 d0->length = rte_pktmbuf_data_len(mbuf);
711 mq->n_bytes += rte_pktmbuf_data_len(mbuf);
712 /* FIXME: get region index */
714 d0->offset = rte_pktmbuf_mtod(mbuf, uint8_t *) -
715 (uint8_t *)proc_private->regions[d0->region]->addr;
718 /* check if buffer is chained */
719 if (rte_pktmbuf_is_contiguous(mbuf) == 0) {
722 /* mark buffer as chained */
723 d0->flags |= MEMIF_DESC_FLAG_NEXT;
726 /* update counters */
736 eth_memif_tx_zc(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
738 struct memif_queue *mq = queue;
739 struct pmd_internals *pmd = rte_eth_devices[mq->in_port].data->dev_private;
740 struct pmd_process_private *proc_private =
741 rte_eth_devices[mq->in_port].process_private;
742 memif_ring_t *ring = memif_get_ring_from_queue(proc_private, mq);
743 uint16_t slot, n_free, ring_size, mask, n_tx_pkts = 0;
744 struct rte_eth_link link;
746 if (unlikely((pmd->flags & ETH_MEMIF_FLAG_CONNECTED) == 0))
748 if (unlikely(ring == NULL)) {
749 /* Secondary process will attempt to request regions. */
750 rte_eth_link_get(mq->in_port, &link);
754 ring_size = 1 << mq->log2_ring_size;
755 mask = ring_size - 1;
757 /* free mbufs received by server */
758 memif_free_stored_mbufs(proc_private, mq);
760 /* ring type always MEMIF_RING_C2S */
761 /* For C2S queues ring->head is updated by the sender and
762 * this function is called in the context of sending thread.
763 * The loads in the sender do not need to synchronize with
764 * its own stores. Hence, the following load can be a
767 slot = __atomic_load_n(&ring->head, __ATOMIC_RELAXED);
768 n_free = ring_size - slot + mq->last_tail;
772 while (n_free && (n_tx_pkts < nb_pkts)) {
773 while ((n_free > 4) && ((nb_pkts - n_tx_pkts) > 4)) {
774 if ((nb_pkts - n_tx_pkts) > 8) {
775 rte_prefetch0(*bufs + 4);
776 rte_prefetch0(*bufs + 5);
777 rte_prefetch0(*bufs + 6);
778 rte_prefetch0(*bufs + 7);
780 used_slots = memif_tx_one_zc(proc_private, mq, ring, *bufs++,
782 if (unlikely(used_slots < 1))
786 n_free -= used_slots;
788 used_slots = memif_tx_one_zc(proc_private, mq, ring, *bufs++,
790 if (unlikely(used_slots < 1))
794 n_free -= used_slots;
796 used_slots = memif_tx_one_zc(proc_private, mq, ring, *bufs++,
798 if (unlikely(used_slots < 1))
802 n_free -= used_slots;
804 used_slots = memif_tx_one_zc(proc_private, mq, ring, *bufs++,
806 if (unlikely(used_slots < 1))
810 n_free -= used_slots;
812 used_slots = memif_tx_one_zc(proc_private, mq, ring, *bufs++,
814 if (unlikely(used_slots < 1))
818 n_free -= used_slots;
822 /* ring type always MEMIF_RING_C2S */
823 /* The ring->head acts as a guard variable between Tx and Rx
824 * threads, so using store-release pairs with load-acquire
825 * in function eth_memif_rx for C2S rings.
827 __atomic_store_n(&ring->head, slot, __ATOMIC_RELEASE);
829 /* Send interrupt, if enabled. */
830 if ((ring->flags & MEMIF_RING_FLAG_MASK_INT) == 0) {
832 ssize_t size = write(mq->intr_handle.fd, &a, sizeof(a));
833 if (unlikely(size < 0)) {
835 "Failed to send interrupt. %s", strerror(errno));
839 /* increment queue counters */
840 mq->n_pkts += n_tx_pkts;
846 memif_free_regions(struct rte_eth_dev *dev)
848 struct pmd_process_private *proc_private = dev->process_private;
849 struct pmd_internals *pmd = dev->data->dev_private;
851 struct memif_region *r;
853 /* regions are allocated contiguously, so it's
854 * enough to loop until 'proc_private->regions_num'
856 for (i = 0; i < proc_private->regions_num; i++) {
857 r = proc_private->regions[i];
859 /* This is memzone */
860 if (i > 0 && (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY)) {
865 if (r->addr != NULL) {
866 munmap(r->addr, r->region_size);
873 proc_private->regions[i] = NULL;
876 proc_private->regions_num = 0;
880 memif_region_init_zc(const struct rte_memseg_list *msl, const struct rte_memseg *ms,
883 struct pmd_process_private *proc_private = (struct pmd_process_private *)arg;
884 struct memif_region *r;
886 if (proc_private->regions_num < 1) {
887 MIF_LOG(ERR, "Missing descriptor region");
891 r = proc_private->regions[proc_private->regions_num - 1];
893 if (r->addr != msl->base_va)
894 r = proc_private->regions[++proc_private->regions_num - 1];
897 r = rte_zmalloc("region", sizeof(struct memif_region), 0);
899 MIF_LOG(ERR, "Failed to alloc memif region.");
903 r->addr = msl->base_va;
904 r->region_size = ms->len;
905 r->fd = rte_memseg_get_fd(ms);
908 r->pkt_buffer_offset = 0;
910 proc_private->regions[proc_private->regions_num - 1] = r;
912 r->region_size += ms->len;
919 memif_region_init_shm(struct rte_eth_dev *dev, uint8_t has_buffers)
921 struct pmd_internals *pmd = dev->data->dev_private;
922 struct pmd_process_private *proc_private = dev->process_private;
923 char shm_name[ETH_MEMIF_SHM_NAME_SIZE];
925 struct memif_region *r;
927 if (proc_private->regions_num >= ETH_MEMIF_MAX_REGION_NUM) {
928 MIF_LOG(ERR, "Too many regions.");
932 r = rte_zmalloc("region", sizeof(struct memif_region), 0);
934 MIF_LOG(ERR, "Failed to alloc memif region.");
938 /* calculate buffer offset */
939 r->pkt_buffer_offset = (pmd->run.num_c2s_rings + pmd->run.num_s2c_rings) *
940 (sizeof(memif_ring_t) + sizeof(memif_desc_t) *
941 (1 << pmd->run.log2_ring_size));
943 r->region_size = r->pkt_buffer_offset;
944 /* if region has buffers, add buffers size to region_size */
945 if (has_buffers == 1)
946 r->region_size += (uint32_t)(pmd->run.pkt_buffer_size *
947 (1 << pmd->run.log2_ring_size) *
948 (pmd->run.num_c2s_rings +
949 pmd->run.num_s2c_rings));
951 memset(shm_name, 0, sizeof(char) * ETH_MEMIF_SHM_NAME_SIZE);
952 snprintf(shm_name, ETH_MEMIF_SHM_NAME_SIZE, "memif_region_%d",
953 proc_private->regions_num);
955 r->fd = memfd_create(shm_name, MFD_ALLOW_SEALING);
957 MIF_LOG(ERR, "Failed to create shm file: %s.", strerror(errno));
962 ret = fcntl(r->fd, F_ADD_SEALS, F_SEAL_SHRINK);
964 MIF_LOG(ERR, "Failed to add seals to shm file: %s.", strerror(errno));
968 ret = ftruncate(r->fd, r->region_size);
970 MIF_LOG(ERR, "Failed to truncate shm file: %s.", strerror(errno));
974 r->addr = mmap(NULL, r->region_size, PROT_READ |
975 PROT_WRITE, MAP_SHARED, r->fd, 0);
976 if (r->addr == MAP_FAILED) {
977 MIF_LOG(ERR, "Failed to mmap shm region: %s.", strerror(ret));
982 proc_private->regions[proc_private->regions_num] = r;
983 proc_private->regions_num++;
996 memif_regions_init(struct rte_eth_dev *dev)
998 struct pmd_internals *pmd = dev->data->dev_private;
1002 * Zero-copy exposes dpdk memory.
1003 * Each memseg list will be represented by memif region.
1004 * Zero-copy regions indexing: memseg list idx + 1,
1005 * as we already have region 0 reserved for descriptors.
1007 if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) {
1008 /* create region idx 0 containing descriptors */
1009 ret = memif_region_init_shm(dev, 0);
1012 ret = rte_memseg_walk(memif_region_init_zc, (void *)dev->process_private);
1016 /* create one memory region contaning rings and buffers */
1017 ret = memif_region_init_shm(dev, /* has buffers */ 1);
1026 memif_init_rings(struct rte_eth_dev *dev)
1028 struct pmd_internals *pmd = dev->data->dev_private;
1029 struct pmd_process_private *proc_private = dev->process_private;
1034 for (i = 0; i < pmd->run.num_c2s_rings; i++) {
1035 ring = memif_get_ring(pmd, proc_private, MEMIF_RING_C2S, i);
1036 __atomic_store_n(&ring->head, 0, __ATOMIC_RELAXED);
1037 __atomic_store_n(&ring->tail, 0, __ATOMIC_RELAXED);
1038 ring->cookie = MEMIF_COOKIE;
1041 if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY)
1044 for (j = 0; j < (1 << pmd->run.log2_ring_size); j++) {
1045 slot = i * (1 << pmd->run.log2_ring_size) + j;
1046 ring->desc[j].region = 0;
1047 ring->desc[j].offset =
1048 proc_private->regions[0]->pkt_buffer_offset +
1049 (uint32_t)(slot * pmd->run.pkt_buffer_size);
1050 ring->desc[j].length = pmd->run.pkt_buffer_size;
1054 for (i = 0; i < pmd->run.num_s2c_rings; i++) {
1055 ring = memif_get_ring(pmd, proc_private, MEMIF_RING_S2C, i);
1056 __atomic_store_n(&ring->head, 0, __ATOMIC_RELAXED);
1057 __atomic_store_n(&ring->tail, 0, __ATOMIC_RELAXED);
1058 ring->cookie = MEMIF_COOKIE;
1061 if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY)
1064 for (j = 0; j < (1 << pmd->run.log2_ring_size); j++) {
1065 slot = (i + pmd->run.num_c2s_rings) *
1066 (1 << pmd->run.log2_ring_size) + j;
1067 ring->desc[j].region = 0;
1068 ring->desc[j].offset =
1069 proc_private->regions[0]->pkt_buffer_offset +
1070 (uint32_t)(slot * pmd->run.pkt_buffer_size);
1071 ring->desc[j].length = pmd->run.pkt_buffer_size;
1076 /* called only by client */
1078 memif_init_queues(struct rte_eth_dev *dev)
1080 struct pmd_internals *pmd = dev->data->dev_private;
1081 struct memif_queue *mq;
1084 for (i = 0; i < pmd->run.num_c2s_rings; i++) {
1085 mq = dev->data->tx_queues[i];
1086 mq->log2_ring_size = pmd->run.log2_ring_size;
1087 /* queues located only in region 0 */
1089 mq->ring_offset = memif_get_ring_offset(dev, mq, MEMIF_RING_C2S, i);
1092 mq->intr_handle.fd = eventfd(0, EFD_NONBLOCK);
1093 if (mq->intr_handle.fd < 0) {
1095 "Failed to create eventfd for tx queue %d: %s.", i,
1099 if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) {
1100 mq->buffers = rte_zmalloc("bufs", sizeof(struct rte_mbuf *) *
1101 (1 << mq->log2_ring_size), 0);
1102 if (mq->buffers == NULL)
1107 for (i = 0; i < pmd->run.num_s2c_rings; i++) {
1108 mq = dev->data->rx_queues[i];
1109 mq->log2_ring_size = pmd->run.log2_ring_size;
1110 /* queues located only in region 0 */
1112 mq->ring_offset = memif_get_ring_offset(dev, mq, MEMIF_RING_S2C, i);
1115 mq->intr_handle.fd = eventfd(0, EFD_NONBLOCK);
1116 if (mq->intr_handle.fd < 0) {
1118 "Failed to create eventfd for rx queue %d: %s.", i,
1122 if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) {
1123 mq->buffers = rte_zmalloc("bufs", sizeof(struct rte_mbuf *) *
1124 (1 << mq->log2_ring_size), 0);
1125 if (mq->buffers == NULL)
1133 memif_init_regions_and_queues(struct rte_eth_dev *dev)
1137 ret = memif_regions_init(dev);
1141 memif_init_rings(dev);
1143 ret = memif_init_queues(dev);
1151 memif_connect(struct rte_eth_dev *dev)
1153 struct pmd_internals *pmd = dev->data->dev_private;
1154 struct pmd_process_private *proc_private = dev->process_private;
1155 struct memif_region *mr;
1156 struct memif_queue *mq;
1160 for (i = 0; i < proc_private->regions_num; i++) {
1161 mr = proc_private->regions[i];
1163 if (mr->addr == NULL) {
1166 mr->addr = mmap(NULL, mr->region_size,
1167 PROT_READ | PROT_WRITE,
1168 MAP_SHARED, mr->fd, 0);
1169 if (mr->addr == MAP_FAILED) {
1170 MIF_LOG(ERR, "mmap failed: %s\n",
1175 if (i > 0 && (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY)) {
1176 /* close memseg file */
1183 if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
1184 for (i = 0; i < pmd->run.num_c2s_rings; i++) {
1185 mq = (pmd->role == MEMIF_ROLE_CLIENT) ?
1186 dev->data->tx_queues[i] : dev->data->rx_queues[i];
1187 ring = memif_get_ring_from_queue(proc_private, mq);
1188 if (ring == NULL || ring->cookie != MEMIF_COOKIE) {
1189 MIF_LOG(ERR, "Wrong ring");
1192 __atomic_store_n(&ring->head, 0, __ATOMIC_RELAXED);
1193 __atomic_store_n(&ring->tail, 0, __ATOMIC_RELAXED);
1196 /* enable polling mode */
1197 if (pmd->role == MEMIF_ROLE_SERVER)
1198 ring->flags = MEMIF_RING_FLAG_MASK_INT;
1200 for (i = 0; i < pmd->run.num_s2c_rings; i++) {
1201 mq = (pmd->role == MEMIF_ROLE_CLIENT) ?
1202 dev->data->rx_queues[i] : dev->data->tx_queues[i];
1203 ring = memif_get_ring_from_queue(proc_private, mq);
1204 if (ring == NULL || ring->cookie != MEMIF_COOKIE) {
1205 MIF_LOG(ERR, "Wrong ring");
1208 __atomic_store_n(&ring->head, 0, __ATOMIC_RELAXED);
1209 __atomic_store_n(&ring->tail, 0, __ATOMIC_RELAXED);
1212 /* enable polling mode */
1213 if (pmd->role == MEMIF_ROLE_CLIENT)
1214 ring->flags = MEMIF_RING_FLAG_MASK_INT;
1217 pmd->flags &= ~ETH_MEMIF_FLAG_CONNECTING;
1218 pmd->flags |= ETH_MEMIF_FLAG_CONNECTED;
1219 dev->data->dev_link.link_status = ETH_LINK_UP;
1221 MIF_LOG(INFO, "Connected.");
1226 memif_dev_start(struct rte_eth_dev *dev)
1228 struct pmd_internals *pmd = dev->data->dev_private;
1231 switch (pmd->role) {
1232 case MEMIF_ROLE_CLIENT:
1233 ret = memif_connect_client(dev);
1235 case MEMIF_ROLE_SERVER:
1236 ret = memif_connect_server(dev);
1239 MIF_LOG(ERR, "Unknown role: %d.", pmd->role);
1248 memif_dev_close(struct rte_eth_dev *dev)
1250 struct pmd_internals *pmd = dev->data->dev_private;
1253 if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
1254 memif_msg_enq_disconnect(pmd->cc, "Device closed", 0);
1255 memif_disconnect(dev);
1257 for (i = 0; i < dev->data->nb_rx_queues; i++)
1258 (*dev->dev_ops->rx_queue_release)(dev->data->rx_queues[i]);
1259 for (i = 0; i < dev->data->nb_tx_queues; i++)
1260 (*dev->dev_ops->tx_queue_release)(dev->data->tx_queues[i]);
1262 memif_socket_remove_device(dev);
1264 memif_disconnect(dev);
1267 rte_free(dev->process_private);
1273 memif_dev_configure(struct rte_eth_dev *dev)
1275 struct pmd_internals *pmd = dev->data->dev_private;
1281 pmd->cfg.num_c2s_rings = (pmd->role == MEMIF_ROLE_CLIENT) ?
1282 dev->data->nb_tx_queues : dev->data->nb_rx_queues;
1288 pmd->cfg.num_s2c_rings = (pmd->role == MEMIF_ROLE_CLIENT) ?
1289 dev->data->nb_rx_queues : dev->data->nb_tx_queues;
1295 memif_tx_queue_setup(struct rte_eth_dev *dev,
1297 uint16_t nb_tx_desc __rte_unused,
1298 unsigned int socket_id __rte_unused,
1299 const struct rte_eth_txconf *tx_conf __rte_unused)
1301 struct pmd_internals *pmd = dev->data->dev_private;
1302 struct memif_queue *mq;
1304 mq = rte_zmalloc("tx-queue", sizeof(struct memif_queue), 0);
1306 MIF_LOG(ERR, "Failed to allocate tx queue id: %u", qid);
1311 (pmd->role == MEMIF_ROLE_CLIENT) ? MEMIF_RING_C2S : MEMIF_RING_S2C;
1314 mq->intr_handle.fd = -1;
1315 mq->intr_handle.type = RTE_INTR_HANDLE_EXT;
1316 mq->in_port = dev->data->port_id;
1317 dev->data->tx_queues[qid] = mq;
1323 memif_rx_queue_setup(struct rte_eth_dev *dev,
1325 uint16_t nb_rx_desc __rte_unused,
1326 unsigned int socket_id __rte_unused,
1327 const struct rte_eth_rxconf *rx_conf __rte_unused,
1328 struct rte_mempool *mb_pool)
1330 struct pmd_internals *pmd = dev->data->dev_private;
1331 struct memif_queue *mq;
1333 mq = rte_zmalloc("rx-queue", sizeof(struct memif_queue), 0);
1335 MIF_LOG(ERR, "Failed to allocate rx queue id: %u", qid);
1339 mq->type = (pmd->role == MEMIF_ROLE_CLIENT) ? MEMIF_RING_S2C : MEMIF_RING_C2S;
1342 mq->intr_handle.fd = -1;
1343 mq->intr_handle.type = RTE_INTR_HANDLE_EXT;
1344 mq->mempool = mb_pool;
1345 mq->in_port = dev->data->port_id;
1346 dev->data->rx_queues[qid] = mq;
1352 memif_queue_release(void *queue)
1354 struct memif_queue *mq = (struct memif_queue *)queue;
1363 memif_link_update(struct rte_eth_dev *dev,
1364 int wait_to_complete __rte_unused)
1366 struct pmd_process_private *proc_private;
1368 if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1369 proc_private = dev->process_private;
1370 if (dev->data->dev_link.link_status == ETH_LINK_UP &&
1371 proc_private->regions_num == 0) {
1372 memif_mp_request_regions(dev);
1373 } else if (dev->data->dev_link.link_status == ETH_LINK_DOWN &&
1374 proc_private->regions_num > 0) {
1375 memif_free_regions(dev);
1382 memif_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
1384 struct pmd_internals *pmd = dev->data->dev_private;
1385 struct memif_queue *mq;
1389 stats->ipackets = 0;
1391 stats->opackets = 0;
1394 tmp = (pmd->role == MEMIF_ROLE_CLIENT) ? pmd->run.num_c2s_rings :
1395 pmd->run.num_s2c_rings;
1396 nq = (tmp < RTE_ETHDEV_QUEUE_STAT_CNTRS) ? tmp :
1397 RTE_ETHDEV_QUEUE_STAT_CNTRS;
1400 for (i = 0; i < nq; i++) {
1401 mq = dev->data->rx_queues[i];
1402 stats->q_ipackets[i] = mq->n_pkts;
1403 stats->q_ibytes[i] = mq->n_bytes;
1404 stats->ipackets += mq->n_pkts;
1405 stats->ibytes += mq->n_bytes;
1408 tmp = (pmd->role == MEMIF_ROLE_CLIENT) ? pmd->run.num_s2c_rings :
1409 pmd->run.num_c2s_rings;
1410 nq = (tmp < RTE_ETHDEV_QUEUE_STAT_CNTRS) ? tmp :
1411 RTE_ETHDEV_QUEUE_STAT_CNTRS;
1414 for (i = 0; i < nq; i++) {
1415 mq = dev->data->tx_queues[i];
1416 stats->q_opackets[i] = mq->n_pkts;
1417 stats->q_obytes[i] = mq->n_bytes;
1418 stats->opackets += mq->n_pkts;
1419 stats->obytes += mq->n_bytes;
1425 memif_stats_reset(struct rte_eth_dev *dev)
1427 struct pmd_internals *pmd = dev->data->dev_private;
1429 struct memif_queue *mq;
1431 for (i = 0; i < pmd->run.num_c2s_rings; i++) {
1432 mq = (pmd->role == MEMIF_ROLE_CLIENT) ? dev->data->tx_queues[i] :
1433 dev->data->rx_queues[i];
1437 for (i = 0; i < pmd->run.num_s2c_rings; i++) {
1438 mq = (pmd->role == MEMIF_ROLE_CLIENT) ? dev->data->rx_queues[i] :
1439 dev->data->tx_queues[i];
1448 memif_rx_queue_intr_enable(struct rte_eth_dev *dev __rte_unused,
1449 uint16_t qid __rte_unused)
1451 MIF_LOG(WARNING, "Interrupt mode not supported.");
1457 memif_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t qid __rte_unused)
1459 struct pmd_internals *pmd __rte_unused = dev->data->dev_private;
1464 static const struct eth_dev_ops ops = {
1465 .dev_start = memif_dev_start,
1466 .dev_close = memif_dev_close,
1467 .dev_infos_get = memif_dev_info,
1468 .dev_configure = memif_dev_configure,
1469 .tx_queue_setup = memif_tx_queue_setup,
1470 .rx_queue_setup = memif_rx_queue_setup,
1471 .rx_queue_release = memif_queue_release,
1472 .tx_queue_release = memif_queue_release,
1473 .rx_queue_intr_enable = memif_rx_queue_intr_enable,
1474 .rx_queue_intr_disable = memif_rx_queue_intr_disable,
1475 .link_update = memif_link_update,
1476 .stats_get = memif_stats_get,
1477 .stats_reset = memif_stats_reset,
1481 memif_create(struct rte_vdev_device *vdev, enum memif_role_t role,
1482 memif_interface_id_t id, uint32_t flags,
1483 const char *socket_filename,
1484 memif_log2_ring_size_t log2_ring_size,
1485 uint16_t pkt_buffer_size, const char *secret,
1486 struct rte_ether_addr *ether_addr)
1489 struct rte_eth_dev *eth_dev;
1490 struct rte_eth_dev_data *data;
1491 struct pmd_internals *pmd;
1492 struct pmd_process_private *process_private;
1493 const unsigned int numa_node = vdev->device.numa_node;
1494 const char *name = rte_vdev_device_name(vdev);
1496 eth_dev = rte_eth_vdev_allocate(vdev, sizeof(*pmd));
1497 if (eth_dev == NULL) {
1498 MIF_LOG(ERR, "%s: Unable to allocate device struct.", name);
1502 process_private = (struct pmd_process_private *)
1503 rte_zmalloc(name, sizeof(struct pmd_process_private),
1504 RTE_CACHE_LINE_SIZE);
1506 if (process_private == NULL) {
1507 MIF_LOG(ERR, "Failed to alloc memory for process private");
1510 eth_dev->process_private = process_private;
1512 pmd = eth_dev->data->dev_private;
1513 memset(pmd, 0, sizeof(*pmd));
1517 pmd->flags |= ETH_MEMIF_FLAG_DISABLED;
1519 /* Zero-copy flag irelevant to server. */
1520 if (pmd->role == MEMIF_ROLE_SERVER)
1521 pmd->flags &= ~ETH_MEMIF_FLAG_ZERO_COPY;
1523 ret = memif_socket_init(eth_dev, socket_filename);
1527 memset(pmd->secret, 0, sizeof(char) * ETH_MEMIF_SECRET_SIZE);
1529 strlcpy(pmd->secret, secret, sizeof(pmd->secret));
1531 pmd->cfg.log2_ring_size = log2_ring_size;
1532 /* set in .dev_configure() */
1533 pmd->cfg.num_c2s_rings = 0;
1534 pmd->cfg.num_s2c_rings = 0;
1536 pmd->cfg.pkt_buffer_size = pkt_buffer_size;
1537 rte_spinlock_init(&pmd->cc_lock);
1539 data = eth_dev->data;
1540 data->dev_private = pmd;
1541 data->numa_node = numa_node;
1542 data->dev_link = pmd_link;
1543 data->mac_addrs = ether_addr;
1544 data->promiscuous = 1;
1545 data->dev_flags |= RTE_ETH_DEV_AUTOFILL_QUEUE_XSTATS;
1547 eth_dev->dev_ops = &ops;
1548 eth_dev->device = &vdev->device;
1549 if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) {
1550 eth_dev->rx_pkt_burst = eth_memif_rx_zc;
1551 eth_dev->tx_pkt_burst = eth_memif_tx_zc;
1553 eth_dev->rx_pkt_burst = eth_memif_rx;
1554 eth_dev->tx_pkt_burst = eth_memif_tx;
1557 rte_eth_dev_probing_finish(eth_dev);
1563 memif_set_role(const char *key __rte_unused, const char *value,
1566 enum memif_role_t *role = (enum memif_role_t *)extra_args;
1568 if (strstr(value, "server") != NULL) {
1569 *role = MEMIF_ROLE_SERVER;
1570 } else if (strstr(value, "client") != NULL) {
1571 *role = MEMIF_ROLE_CLIENT;
1572 } else if (strstr(value, "master") != NULL) {
1573 MIF_LOG(NOTICE, "Role argument \"master\" is deprecated, use \"server\"");
1574 *role = MEMIF_ROLE_SERVER;
1575 } else if (strstr(value, "slave") != NULL) {
1576 MIF_LOG(NOTICE, "Role argument \"slave\" is deprecated, use \"client\"");
1577 *role = MEMIF_ROLE_CLIENT;
1579 MIF_LOG(ERR, "Unknown role: %s.", value);
1586 memif_set_zc(const char *key __rte_unused, const char *value, void *extra_args)
1588 uint32_t *flags = (uint32_t *)extra_args;
1590 if (strstr(value, "yes") != NULL) {
1591 if (!rte_mcfg_get_single_file_segments()) {
1592 MIF_LOG(ERR, "Zero-copy doesn't support multi-file segments.");
1595 *flags |= ETH_MEMIF_FLAG_ZERO_COPY;
1596 } else if (strstr(value, "no") != NULL) {
1597 *flags &= ~ETH_MEMIF_FLAG_ZERO_COPY;
1599 MIF_LOG(ERR, "Failed to parse zero-copy param: %s.", value);
1606 memif_set_id(const char *key __rte_unused, const char *value, void *extra_args)
1608 memif_interface_id_t *id = (memif_interface_id_t *)extra_args;
1610 /* even if parsing fails, 0 is a valid id */
1611 *id = strtoul(value, NULL, 10);
1616 memif_set_bs(const char *key __rte_unused, const char *value, void *extra_args)
1619 uint16_t *pkt_buffer_size = (uint16_t *)extra_args;
1621 tmp = strtoul(value, NULL, 10);
1622 if (tmp == 0 || tmp > 0xFFFF) {
1623 MIF_LOG(ERR, "Invalid buffer size: %s.", value);
1626 *pkt_buffer_size = tmp;
1631 memif_set_rs(const char *key __rte_unused, const char *value, void *extra_args)
1634 memif_log2_ring_size_t *log2_ring_size =
1635 (memif_log2_ring_size_t *)extra_args;
1637 tmp = strtoul(value, NULL, 10);
1638 if (tmp == 0 || tmp > ETH_MEMIF_MAX_LOG2_RING_SIZE) {
1639 MIF_LOG(ERR, "Invalid ring size: %s (max %u).",
1640 value, ETH_MEMIF_MAX_LOG2_RING_SIZE);
1643 *log2_ring_size = tmp;
1647 /* check if directory exists and if we have permission to read/write */
1649 memif_check_socket_filename(const char *filename)
1651 char *dir = NULL, *tmp;
1655 if (strlen(filename) >= MEMIF_SOCKET_UN_SIZE) {
1656 MIF_LOG(ERR, "Unix socket address too long (max 108).");
1660 tmp = strrchr(filename, '/');
1662 idx = tmp - filename;
1663 dir = rte_zmalloc("memif_tmp", sizeof(char) * (idx + 1), 0);
1665 MIF_LOG(ERR, "Failed to allocate memory.");
1668 strlcpy(dir, filename, sizeof(char) * (idx + 1));
1671 if (dir == NULL || (faccessat(-1, dir, F_OK | R_OK |
1672 W_OK, AT_EACCESS) < 0)) {
1673 MIF_LOG(ERR, "Invalid socket directory.");
1684 memif_set_socket_filename(const char *key __rte_unused, const char *value,
1687 const char **socket_filename = (const char **)extra_args;
1689 *socket_filename = value;
1694 memif_set_is_socket_abstract(const char *key __rte_unused, const char *value, void *extra_args)
1696 uint32_t *flags = (uint32_t *)extra_args;
1698 if (strstr(value, "yes") != NULL) {
1699 *flags |= ETH_MEMIF_FLAG_SOCKET_ABSTRACT;
1700 } else if (strstr(value, "no") != NULL) {
1701 *flags &= ~ETH_MEMIF_FLAG_SOCKET_ABSTRACT;
1703 MIF_LOG(ERR, "Failed to parse socket-abstract param: %s.", value);
1710 memif_set_mac(const char *key __rte_unused, const char *value, void *extra_args)
1712 struct rte_ether_addr *ether_addr = (struct rte_ether_addr *)extra_args;
1714 if (rte_ether_unformat_addr(value, ether_addr) < 0)
1715 MIF_LOG(WARNING, "Failed to parse mac '%s'.", value);
1720 memif_set_secret(const char *key __rte_unused, const char *value, void *extra_args)
1722 const char **secret = (const char **)extra_args;
1729 rte_pmd_memif_probe(struct rte_vdev_device *vdev)
1731 RTE_BUILD_BUG_ON(sizeof(memif_msg_t) != 128);
1732 RTE_BUILD_BUG_ON(sizeof(memif_desc_t) != 16);
1734 struct rte_kvargs *kvlist;
1735 const char *name = rte_vdev_device_name(vdev);
1736 enum memif_role_t role = MEMIF_ROLE_CLIENT;
1737 memif_interface_id_t id = 0;
1738 uint16_t pkt_buffer_size = ETH_MEMIF_DEFAULT_PKT_BUFFER_SIZE;
1739 memif_log2_ring_size_t log2_ring_size = ETH_MEMIF_DEFAULT_RING_SIZE;
1740 const char *socket_filename = ETH_MEMIF_DEFAULT_SOCKET_FILENAME;
1742 const char *secret = NULL;
1743 struct rte_ether_addr *ether_addr = rte_zmalloc("",
1744 sizeof(struct rte_ether_addr), 0);
1745 struct rte_eth_dev *eth_dev;
1747 rte_eth_random_addr(ether_addr->addr_bytes);
1749 MIF_LOG(INFO, "Initialize MEMIF: %s.", name);
1751 if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1752 eth_dev = rte_eth_dev_attach_secondary(name);
1754 MIF_LOG(ERR, "Failed to probe %s", name);
1758 eth_dev->dev_ops = &ops;
1759 eth_dev->device = &vdev->device;
1760 eth_dev->rx_pkt_burst = eth_memif_rx;
1761 eth_dev->tx_pkt_burst = eth_memif_tx;
1763 if (!rte_eal_primary_proc_alive(NULL)) {
1764 MIF_LOG(ERR, "Primary process is missing");
1768 eth_dev->process_private = (struct pmd_process_private *)
1770 sizeof(struct pmd_process_private),
1771 RTE_CACHE_LINE_SIZE);
1772 if (eth_dev->process_private == NULL) {
1774 "Failed to alloc memory for process private");
1778 rte_eth_dev_probing_finish(eth_dev);
1783 ret = rte_mp_action_register(MEMIF_MP_SEND_REGION, memif_mp_send_region);
1785 * Primary process can continue probing, but secondary process won't
1786 * be able to get memory regions information
1788 if (ret < 0 && rte_errno != EEXIST)
1789 MIF_LOG(WARNING, "Failed to register mp action callback: %s",
1790 strerror(rte_errno));
1792 /* use abstract address by default */
1793 flags |= ETH_MEMIF_FLAG_SOCKET_ABSTRACT;
1795 kvlist = rte_kvargs_parse(rte_vdev_device_args(vdev), valid_arguments);
1797 /* parse parameters */
1798 if (kvlist != NULL) {
1799 ret = rte_kvargs_process(kvlist, ETH_MEMIF_ROLE_ARG,
1800 &memif_set_role, &role);
1803 ret = rte_kvargs_process(kvlist, ETH_MEMIF_ID_ARG,
1804 &memif_set_id, &id);
1807 ret = rte_kvargs_process(kvlist, ETH_MEMIF_PKT_BUFFER_SIZE_ARG,
1808 &memif_set_bs, &pkt_buffer_size);
1811 ret = rte_kvargs_process(kvlist, ETH_MEMIF_RING_SIZE_ARG,
1812 &memif_set_rs, &log2_ring_size);
1815 ret = rte_kvargs_process(kvlist, ETH_MEMIF_SOCKET_ARG,
1816 &memif_set_socket_filename,
1817 (void *)(&socket_filename));
1820 ret = rte_kvargs_process(kvlist, ETH_MEMIF_SOCKET_ABSTRACT_ARG,
1821 &memif_set_is_socket_abstract, &flags);
1824 ret = rte_kvargs_process(kvlist, ETH_MEMIF_MAC_ARG,
1825 &memif_set_mac, ether_addr);
1828 ret = rte_kvargs_process(kvlist, ETH_MEMIF_ZC_ARG,
1829 &memif_set_zc, &flags);
1832 ret = rte_kvargs_process(kvlist, ETH_MEMIF_SECRET_ARG,
1833 &memif_set_secret, (void *)(&secret));
1838 if (!(flags & ETH_MEMIF_FLAG_SOCKET_ABSTRACT)) {
1839 ret = memif_check_socket_filename(socket_filename);
1844 /* create interface */
1845 ret = memif_create(vdev, role, id, flags, socket_filename,
1846 log2_ring_size, pkt_buffer_size, secret, ether_addr);
1850 rte_kvargs_free(kvlist);
1855 rte_pmd_memif_remove(struct rte_vdev_device *vdev)
1857 struct rte_eth_dev *eth_dev;
1859 eth_dev = rte_eth_dev_allocated(rte_vdev_device_name(vdev));
1860 if (eth_dev == NULL)
1863 return rte_eth_dev_close(eth_dev->data->port_id);
1866 static struct rte_vdev_driver pmd_memif_drv = {
1867 .probe = rte_pmd_memif_probe,
1868 .remove = rte_pmd_memif_remove,
1871 RTE_PMD_REGISTER_VDEV(net_memif, pmd_memif_drv);
1873 RTE_PMD_REGISTER_PARAM_STRING(net_memif,
1874 ETH_MEMIF_ID_ARG "=<int>"
1875 ETH_MEMIF_ROLE_ARG "=server|client"
1876 ETH_MEMIF_PKT_BUFFER_SIZE_ARG "=<int>"
1877 ETH_MEMIF_RING_SIZE_ARG "=<int>"
1878 ETH_MEMIF_SOCKET_ARG "=<string>"
1879 ETH_MEMIF_SOCKET_ABSTRACT_ARG "=yes|no"
1880 ETH_MEMIF_MAC_ARG "=xx:xx:xx:xx:xx:xx"
1881 ETH_MEMIF_ZC_ARG "=yes|no"
1882 ETH_MEMIF_SECRET_ARG "=<string>");
1884 RTE_LOG_REGISTER_DEFAULT(memif_logtype, NOTICE);