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 memcpy(rte_pktmbuf_mtod_offset(mbuf, void *, dst_off),
387 (uint8_t *)memif_get_buffer(proc_private, d0) + src_off,
398 if (d0->flags & MEMIF_DESC_FLAG_NEXT)
401 mq->n_bytes += rte_pktmbuf_pkt_len(mbuf_head);
407 if (type == MEMIF_RING_C2S) {
408 __atomic_store_n(&ring->tail, cur_slot, __ATOMIC_RELEASE);
409 mq->last_head = cur_slot;
411 mq->last_tail = cur_slot;
415 if (type == MEMIF_RING_S2C) {
416 /* ring->head is updated by the receiver and this function
417 * is called in the context of receiver thread. The loads in
418 * the receiver do not need to synchronize with its own stores.
420 head = __atomic_load_n(&ring->head, __ATOMIC_RELAXED);
421 n_slots = ring_size - head + mq->last_tail;
425 d0 = &ring->desc[s0];
426 d0->length = pmd->run.pkt_buffer_size;
428 __atomic_store_n(&ring->head, head, __ATOMIC_RELEASE);
431 mq->n_pkts += n_rx_pkts;
436 eth_memif_rx_zc(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
438 struct memif_queue *mq = queue;
439 struct pmd_internals *pmd = rte_eth_devices[mq->in_port].data->dev_private;
440 struct pmd_process_private *proc_private =
441 rte_eth_devices[mq->in_port].process_private;
442 memif_ring_t *ring = memif_get_ring_from_queue(proc_private, mq);
443 uint16_t cur_slot, last_slot, n_slots, ring_size, mask, s0, head;
444 uint16_t n_rx_pkts = 0;
446 struct rte_mbuf *mbuf, *mbuf_tail;
447 struct rte_mbuf *mbuf_head = NULL;
449 struct rte_eth_link link;
451 if (unlikely((pmd->flags & ETH_MEMIF_FLAG_CONNECTED) == 0))
453 if (unlikely(ring == NULL)) {
454 /* Secondary process will attempt to request regions. */
455 rte_eth_link_get(mq->in_port, &link);
459 /* consume interrupt */
460 if ((ring->flags & MEMIF_RING_FLAG_MASK_INT) == 0) {
462 ssize_t size __rte_unused;
463 size = read(mq->intr_handle.fd, &b, sizeof(b));
466 ring_size = 1 << mq->log2_ring_size;
467 mask = ring_size - 1;
469 cur_slot = mq->last_tail;
470 /* The ring->tail acts as a guard variable between Tx and Rx
471 * threads, so using load-acquire pairs with store-release
472 * to synchronize it between threads.
474 last_slot = __atomic_load_n(&ring->tail, __ATOMIC_ACQUIRE);
475 if (cur_slot == last_slot)
477 n_slots = last_slot - cur_slot;
479 while (n_slots && n_rx_pkts < nb_pkts) {
480 s0 = cur_slot & mask;
482 d0 = &ring->desc[s0];
483 mbuf_head = mq->buffers[s0];
487 /* prefetch next descriptor */
488 if (n_rx_pkts + 1 < nb_pkts)
489 rte_prefetch0(&ring->desc[(cur_slot + 1) & mask]);
491 mbuf->port = mq->in_port;
492 rte_pktmbuf_data_len(mbuf) = d0->length;
493 rte_pktmbuf_pkt_len(mbuf) = rte_pktmbuf_data_len(mbuf);
495 mq->n_bytes += rte_pktmbuf_data_len(mbuf);
499 if (d0->flags & MEMIF_DESC_FLAG_NEXT) {
500 s0 = cur_slot & mask;
501 d0 = &ring->desc[s0];
503 mbuf = mq->buffers[s0];
504 ret = memif_pktmbuf_chain(mbuf_head, mbuf_tail, mbuf);
505 if (unlikely(ret < 0)) {
506 MIF_LOG(ERR, "number-of-segments-overflow");
516 mq->last_tail = cur_slot;
518 /* Supply server with new buffers */
520 /* ring->head is updated by the receiver and this function
521 * is called in the context of receiver thread. The loads in
522 * the receiver do not need to synchronize with its own stores.
524 head = __atomic_load_n(&ring->head, __ATOMIC_RELAXED);
525 n_slots = ring_size - head + mq->last_tail;
530 ret = rte_pktmbuf_alloc_bulk(mq->mempool, &mq->buffers[head & mask], n_slots);
531 if (unlikely(ret < 0))
537 rte_prefetch0(mq->buffers[head & mask]);
538 d0 = &ring->desc[s0];
539 /* store buffer header */
540 mbuf = mq->buffers[s0];
541 /* populate descriptor */
542 d0->length = rte_pktmbuf_data_room_size(mq->mempool) -
543 RTE_PKTMBUF_HEADROOM;
545 d0->offset = rte_pktmbuf_mtod(mbuf, uint8_t *) -
546 (uint8_t *)proc_private->regions[d0->region]->addr;
549 /* The ring->head acts as a guard variable between Tx and Rx
550 * threads, so using store-release pairs with load-acquire
551 * in function eth_memif_tx.
553 __atomic_store_n(&ring->head, head, __ATOMIC_RELEASE);
555 mq->n_pkts += n_rx_pkts;
561 eth_memif_tx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
563 struct memif_queue *mq = queue;
564 struct pmd_internals *pmd = rte_eth_devices[mq->in_port].data->dev_private;
565 struct pmd_process_private *proc_private =
566 rte_eth_devices[mq->in_port].process_private;
567 memif_ring_t *ring = memif_get_ring_from_queue(proc_private, mq);
568 uint16_t slot, saved_slot, n_free, ring_size, mask, n_tx_pkts = 0;
569 uint16_t src_len, src_off, dst_len, dst_off, cp_len;
570 memif_ring_type_t type = mq->type;
572 struct rte_mbuf *mbuf;
573 struct rte_mbuf *mbuf_head;
576 struct rte_eth_link link;
578 if (unlikely((pmd->flags & ETH_MEMIF_FLAG_CONNECTED) == 0))
580 if (unlikely(ring == NULL)) {
583 /* Secondary process will attempt to request regions. */
584 ret = rte_eth_link_get(mq->in_port, &link);
586 MIF_LOG(ERR, "Failed to get port %u link info: %s",
587 mq->in_port, rte_strerror(-ret));
591 ring_size = 1 << mq->log2_ring_size;
592 mask = ring_size - 1;
594 if (type == MEMIF_RING_C2S) {
595 /* For C2S queues ring->head is updated by the sender and
596 * this function is called in the context of sending thread.
597 * The loads in the sender do not need to synchronize with
598 * its own stores. Hence, the following load can be a
601 slot = __atomic_load_n(&ring->head, __ATOMIC_RELAXED);
602 n_free = ring_size - slot +
603 __atomic_load_n(&ring->tail, __ATOMIC_ACQUIRE);
605 /* For S2C queues ring->tail is updated by the sender and
606 * this function is called in the context of sending thread.
607 * The loads in the sender do not need to synchronize with
608 * its own stores. Hence, the following load can be a
611 slot = __atomic_load_n(&ring->tail, __ATOMIC_RELAXED);
612 n_free = __atomic_load_n(&ring->head, __ATOMIC_ACQUIRE) - slot;
615 while (n_tx_pkts < nb_pkts && n_free) {
620 d0 = &ring->desc[slot & mask];
622 dst_len = (type == MEMIF_RING_C2S) ?
623 pmd->run.pkt_buffer_size : d0->length;
627 src_len = rte_pktmbuf_data_len(mbuf);
634 d0->flags |= MEMIF_DESC_FLAG_NEXT;
635 d0 = &ring->desc[slot & mask];
637 dst_len = (type == MEMIF_RING_C2S) ?
638 pmd->run.pkt_buffer_size : d0->length;
645 cp_len = RTE_MIN(dst_len, src_len);
647 memcpy((uint8_t *)memif_get_buffer(proc_private, d0) + dst_off,
648 rte_pktmbuf_mtod_offset(mbuf, void *, src_off),
651 mq->n_bytes += cp_len;
657 d0->length = dst_off;
660 if (rte_pktmbuf_is_contiguous(mbuf) == 0) {
668 rte_pktmbuf_free(mbuf_head);
672 if (type == MEMIF_RING_C2S)
673 __atomic_store_n(&ring->head, slot, __ATOMIC_RELEASE);
675 __atomic_store_n(&ring->tail, slot, __ATOMIC_RELEASE);
677 if ((ring->flags & MEMIF_RING_FLAG_MASK_INT) == 0) {
679 size = write(mq->intr_handle.fd, &a, sizeof(a));
680 if (unlikely(size < 0)) {
682 "Failed to send interrupt. %s", strerror(errno));
686 mq->n_pkts += n_tx_pkts;
692 memif_tx_one_zc(struct pmd_process_private *proc_private, struct memif_queue *mq,
693 memif_ring_t *ring, struct rte_mbuf *mbuf, const uint16_t mask,
694 uint16_t slot, uint16_t n_free)
700 /* store pointer to mbuf to free it later */
701 mq->buffers[slot & mask] = mbuf;
702 /* Increment refcnt to make sure the buffer is not freed before server
703 * receives it. (current segment)
705 rte_mbuf_refcnt_update(mbuf, 1);
706 /* populate descriptor */
707 d0 = &ring->desc[slot & mask];
708 d0->length = rte_pktmbuf_data_len(mbuf);
709 mq->n_bytes += rte_pktmbuf_data_len(mbuf);
710 /* FIXME: get region index */
712 d0->offset = rte_pktmbuf_mtod(mbuf, uint8_t *) -
713 (uint8_t *)proc_private->regions[d0->region]->addr;
716 /* check if buffer is chained */
717 if (rte_pktmbuf_is_contiguous(mbuf) == 0) {
720 /* mark buffer as chained */
721 d0->flags |= MEMIF_DESC_FLAG_NEXT;
724 /* update counters */
734 eth_memif_tx_zc(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
736 struct memif_queue *mq = queue;
737 struct pmd_internals *pmd = rte_eth_devices[mq->in_port].data->dev_private;
738 struct pmd_process_private *proc_private =
739 rte_eth_devices[mq->in_port].process_private;
740 memif_ring_t *ring = memif_get_ring_from_queue(proc_private, mq);
741 uint16_t slot, n_free, ring_size, mask, n_tx_pkts = 0;
742 struct rte_eth_link link;
744 if (unlikely((pmd->flags & ETH_MEMIF_FLAG_CONNECTED) == 0))
746 if (unlikely(ring == NULL)) {
747 /* Secondary process will attempt to request regions. */
748 rte_eth_link_get(mq->in_port, &link);
752 ring_size = 1 << mq->log2_ring_size;
753 mask = ring_size - 1;
755 /* free mbufs received by server */
756 memif_free_stored_mbufs(proc_private, mq);
758 /* ring type always MEMIF_RING_C2S */
759 /* For C2S queues ring->head is updated by the sender and
760 * this function is called in the context of sending thread.
761 * The loads in the sender do not need to synchronize with
762 * its own stores. Hence, the following load can be a
765 slot = __atomic_load_n(&ring->head, __ATOMIC_RELAXED);
766 n_free = ring_size - slot + mq->last_tail;
770 while (n_free && (n_tx_pkts < nb_pkts)) {
771 while ((n_free > 4) && ((nb_pkts - n_tx_pkts) > 4)) {
772 if ((nb_pkts - n_tx_pkts) > 8) {
773 rte_prefetch0(*bufs + 4);
774 rte_prefetch0(*bufs + 5);
775 rte_prefetch0(*bufs + 6);
776 rte_prefetch0(*bufs + 7);
778 used_slots = memif_tx_one_zc(proc_private, mq, ring, *bufs++,
780 if (unlikely(used_slots < 1))
784 n_free -= used_slots;
786 used_slots = memif_tx_one_zc(proc_private, mq, ring, *bufs++,
788 if (unlikely(used_slots < 1))
792 n_free -= used_slots;
794 used_slots = memif_tx_one_zc(proc_private, mq, ring, *bufs++,
796 if (unlikely(used_slots < 1))
800 n_free -= used_slots;
802 used_slots = memif_tx_one_zc(proc_private, mq, ring, *bufs++,
804 if (unlikely(used_slots < 1))
808 n_free -= used_slots;
810 used_slots = memif_tx_one_zc(proc_private, mq, ring, *bufs++,
812 if (unlikely(used_slots < 1))
816 n_free -= used_slots;
820 /* ring type always MEMIF_RING_C2S */
821 /* The ring->head acts as a guard variable between Tx and Rx
822 * threads, so using store-release pairs with load-acquire
823 * in function eth_memif_rx for C2S rings.
825 __atomic_store_n(&ring->head, slot, __ATOMIC_RELEASE);
827 /* Send interrupt, if enabled. */
828 if ((ring->flags & MEMIF_RING_FLAG_MASK_INT) == 0) {
830 ssize_t size = write(mq->intr_handle.fd, &a, sizeof(a));
831 if (unlikely(size < 0)) {
833 "Failed to send interrupt. %s", strerror(errno));
837 /* increment queue counters */
838 mq->n_pkts += n_tx_pkts;
844 memif_free_regions(struct rte_eth_dev *dev)
846 struct pmd_process_private *proc_private = dev->process_private;
847 struct pmd_internals *pmd = dev->data->dev_private;
849 struct memif_region *r;
851 /* regions are allocated contiguously, so it's
852 * enough to loop until 'proc_private->regions_num'
854 for (i = 0; i < proc_private->regions_num; i++) {
855 r = proc_private->regions[i];
857 /* This is memzone */
858 if (i > 0 && (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY)) {
863 if (r->addr != NULL) {
864 munmap(r->addr, r->region_size);
871 proc_private->regions[i] = NULL;
874 proc_private->regions_num = 0;
878 memif_region_init_zc(const struct rte_memseg_list *msl, const struct rte_memseg *ms,
881 struct pmd_process_private *proc_private = (struct pmd_process_private *)arg;
882 struct memif_region *r;
884 if (proc_private->regions_num < 1) {
885 MIF_LOG(ERR, "Missing descriptor region");
889 r = proc_private->regions[proc_private->regions_num - 1];
891 if (r->addr != msl->base_va)
892 r = proc_private->regions[++proc_private->regions_num - 1];
895 r = rte_zmalloc("region", sizeof(struct memif_region), 0);
897 MIF_LOG(ERR, "Failed to alloc memif region.");
901 r->addr = msl->base_va;
902 r->region_size = ms->len;
903 r->fd = rte_memseg_get_fd(ms);
906 r->pkt_buffer_offset = 0;
908 proc_private->regions[proc_private->regions_num - 1] = r;
910 r->region_size += ms->len;
917 memif_region_init_shm(struct rte_eth_dev *dev, uint8_t has_buffers)
919 struct pmd_internals *pmd = dev->data->dev_private;
920 struct pmd_process_private *proc_private = dev->process_private;
921 char shm_name[ETH_MEMIF_SHM_NAME_SIZE];
923 struct memif_region *r;
925 if (proc_private->regions_num >= ETH_MEMIF_MAX_REGION_NUM) {
926 MIF_LOG(ERR, "Too many regions.");
930 r = rte_zmalloc("region", sizeof(struct memif_region), 0);
932 MIF_LOG(ERR, "Failed to alloc memif region.");
936 /* calculate buffer offset */
937 r->pkt_buffer_offset = (pmd->run.num_c2s_rings + pmd->run.num_s2c_rings) *
938 (sizeof(memif_ring_t) + sizeof(memif_desc_t) *
939 (1 << pmd->run.log2_ring_size));
941 r->region_size = r->pkt_buffer_offset;
942 /* if region has buffers, add buffers size to region_size */
943 if (has_buffers == 1)
944 r->region_size += (uint32_t)(pmd->run.pkt_buffer_size *
945 (1 << pmd->run.log2_ring_size) *
946 (pmd->run.num_c2s_rings +
947 pmd->run.num_s2c_rings));
949 memset(shm_name, 0, sizeof(char) * ETH_MEMIF_SHM_NAME_SIZE);
950 snprintf(shm_name, ETH_MEMIF_SHM_NAME_SIZE, "memif_region_%d",
951 proc_private->regions_num);
953 r->fd = memfd_create(shm_name, MFD_ALLOW_SEALING);
955 MIF_LOG(ERR, "Failed to create shm file: %s.", strerror(errno));
960 ret = fcntl(r->fd, F_ADD_SEALS, F_SEAL_SHRINK);
962 MIF_LOG(ERR, "Failed to add seals to shm file: %s.", strerror(errno));
966 ret = ftruncate(r->fd, r->region_size);
968 MIF_LOG(ERR, "Failed to truncate shm file: %s.", strerror(errno));
972 r->addr = mmap(NULL, r->region_size, PROT_READ |
973 PROT_WRITE, MAP_SHARED, r->fd, 0);
974 if (r->addr == MAP_FAILED) {
975 MIF_LOG(ERR, "Failed to mmap shm region: %s.", strerror(ret));
980 proc_private->regions[proc_private->regions_num] = r;
981 proc_private->regions_num++;
994 memif_regions_init(struct rte_eth_dev *dev)
996 struct pmd_internals *pmd = dev->data->dev_private;
1000 * Zero-copy exposes dpdk memory.
1001 * Each memseg list will be represented by memif region.
1002 * Zero-copy regions indexing: memseg list idx + 1,
1003 * as we already have region 0 reserved for descriptors.
1005 if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) {
1006 /* create region idx 0 containing descriptors */
1007 ret = memif_region_init_shm(dev, 0);
1010 ret = rte_memseg_walk(memif_region_init_zc, (void *)dev->process_private);
1014 /* create one memory region contaning rings and buffers */
1015 ret = memif_region_init_shm(dev, /* has buffers */ 1);
1024 memif_init_rings(struct rte_eth_dev *dev)
1026 struct pmd_internals *pmd = dev->data->dev_private;
1027 struct pmd_process_private *proc_private = dev->process_private;
1032 for (i = 0; i < pmd->run.num_c2s_rings; i++) {
1033 ring = memif_get_ring(pmd, proc_private, MEMIF_RING_C2S, i);
1034 __atomic_store_n(&ring->head, 0, __ATOMIC_RELAXED);
1035 __atomic_store_n(&ring->tail, 0, __ATOMIC_RELAXED);
1036 ring->cookie = MEMIF_COOKIE;
1039 if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY)
1042 for (j = 0; j < (1 << pmd->run.log2_ring_size); j++) {
1043 slot = i * (1 << pmd->run.log2_ring_size) + j;
1044 ring->desc[j].region = 0;
1045 ring->desc[j].offset =
1046 proc_private->regions[0]->pkt_buffer_offset +
1047 (uint32_t)(slot * pmd->run.pkt_buffer_size);
1048 ring->desc[j].length = pmd->run.pkt_buffer_size;
1052 for (i = 0; i < pmd->run.num_s2c_rings; i++) {
1053 ring = memif_get_ring(pmd, proc_private, MEMIF_RING_S2C, i);
1054 __atomic_store_n(&ring->head, 0, __ATOMIC_RELAXED);
1055 __atomic_store_n(&ring->tail, 0, __ATOMIC_RELAXED);
1056 ring->cookie = MEMIF_COOKIE;
1059 if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY)
1062 for (j = 0; j < (1 << pmd->run.log2_ring_size); j++) {
1063 slot = (i + pmd->run.num_c2s_rings) *
1064 (1 << pmd->run.log2_ring_size) + j;
1065 ring->desc[j].region = 0;
1066 ring->desc[j].offset =
1067 proc_private->regions[0]->pkt_buffer_offset +
1068 (uint32_t)(slot * pmd->run.pkt_buffer_size);
1069 ring->desc[j].length = pmd->run.pkt_buffer_size;
1074 /* called only by client */
1076 memif_init_queues(struct rte_eth_dev *dev)
1078 struct pmd_internals *pmd = dev->data->dev_private;
1079 struct memif_queue *mq;
1082 for (i = 0; i < pmd->run.num_c2s_rings; i++) {
1083 mq = dev->data->tx_queues[i];
1084 mq->log2_ring_size = pmd->run.log2_ring_size;
1085 /* queues located only in region 0 */
1087 mq->ring_offset = memif_get_ring_offset(dev, mq, MEMIF_RING_C2S, i);
1090 mq->intr_handle.fd = eventfd(0, EFD_NONBLOCK);
1091 if (mq->intr_handle.fd < 0) {
1093 "Failed to create eventfd for tx queue %d: %s.", i,
1097 if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) {
1098 mq->buffers = rte_zmalloc("bufs", sizeof(struct rte_mbuf *) *
1099 (1 << mq->log2_ring_size), 0);
1100 if (mq->buffers == NULL)
1105 for (i = 0; i < pmd->run.num_s2c_rings; i++) {
1106 mq = dev->data->rx_queues[i];
1107 mq->log2_ring_size = pmd->run.log2_ring_size;
1108 /* queues located only in region 0 */
1110 mq->ring_offset = memif_get_ring_offset(dev, mq, MEMIF_RING_S2C, i);
1113 mq->intr_handle.fd = eventfd(0, EFD_NONBLOCK);
1114 if (mq->intr_handle.fd < 0) {
1116 "Failed to create eventfd for rx queue %d: %s.", i,
1120 if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) {
1121 mq->buffers = rte_zmalloc("bufs", sizeof(struct rte_mbuf *) *
1122 (1 << mq->log2_ring_size), 0);
1123 if (mq->buffers == NULL)
1131 memif_init_regions_and_queues(struct rte_eth_dev *dev)
1135 ret = memif_regions_init(dev);
1139 memif_init_rings(dev);
1141 ret = memif_init_queues(dev);
1149 memif_connect(struct rte_eth_dev *dev)
1151 struct pmd_internals *pmd = dev->data->dev_private;
1152 struct pmd_process_private *proc_private = dev->process_private;
1153 struct memif_region *mr;
1154 struct memif_queue *mq;
1158 for (i = 0; i < proc_private->regions_num; i++) {
1159 mr = proc_private->regions[i];
1161 if (mr->addr == NULL) {
1164 mr->addr = mmap(NULL, mr->region_size,
1165 PROT_READ | PROT_WRITE,
1166 MAP_SHARED, mr->fd, 0);
1167 if (mr->addr == MAP_FAILED) {
1168 MIF_LOG(ERR, "mmap failed: %s\n",
1173 if (i > 0 && (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY)) {
1174 /* close memseg file */
1181 if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
1182 for (i = 0; i < pmd->run.num_c2s_rings; i++) {
1183 mq = (pmd->role == MEMIF_ROLE_CLIENT) ?
1184 dev->data->tx_queues[i] : dev->data->rx_queues[i];
1185 ring = memif_get_ring_from_queue(proc_private, mq);
1186 if (ring == NULL || ring->cookie != MEMIF_COOKIE) {
1187 MIF_LOG(ERR, "Wrong ring");
1190 __atomic_store_n(&ring->head, 0, __ATOMIC_RELAXED);
1191 __atomic_store_n(&ring->tail, 0, __ATOMIC_RELAXED);
1194 /* enable polling mode */
1195 if (pmd->role == MEMIF_ROLE_SERVER)
1196 ring->flags = MEMIF_RING_FLAG_MASK_INT;
1198 for (i = 0; i < pmd->run.num_s2c_rings; i++) {
1199 mq = (pmd->role == MEMIF_ROLE_CLIENT) ?
1200 dev->data->rx_queues[i] : dev->data->tx_queues[i];
1201 ring = memif_get_ring_from_queue(proc_private, mq);
1202 if (ring == NULL || ring->cookie != MEMIF_COOKIE) {
1203 MIF_LOG(ERR, "Wrong ring");
1206 __atomic_store_n(&ring->head, 0, __ATOMIC_RELAXED);
1207 __atomic_store_n(&ring->tail, 0, __ATOMIC_RELAXED);
1210 /* enable polling mode */
1211 if (pmd->role == MEMIF_ROLE_CLIENT)
1212 ring->flags = MEMIF_RING_FLAG_MASK_INT;
1215 pmd->flags &= ~ETH_MEMIF_FLAG_CONNECTING;
1216 pmd->flags |= ETH_MEMIF_FLAG_CONNECTED;
1217 dev->data->dev_link.link_status = ETH_LINK_UP;
1219 MIF_LOG(INFO, "Connected.");
1224 memif_dev_start(struct rte_eth_dev *dev)
1226 struct pmd_internals *pmd = dev->data->dev_private;
1229 switch (pmd->role) {
1230 case MEMIF_ROLE_CLIENT:
1231 ret = memif_connect_client(dev);
1233 case MEMIF_ROLE_SERVER:
1234 ret = memif_connect_server(dev);
1237 MIF_LOG(ERR, "Unknown role: %d.", pmd->role);
1246 memif_dev_close(struct rte_eth_dev *dev)
1248 struct pmd_internals *pmd = dev->data->dev_private;
1251 if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
1252 memif_msg_enq_disconnect(pmd->cc, "Device closed", 0);
1253 memif_disconnect(dev);
1255 for (i = 0; i < dev->data->nb_rx_queues; i++)
1256 (*dev->dev_ops->rx_queue_release)(dev->data->rx_queues[i]);
1257 for (i = 0; i < dev->data->nb_tx_queues; i++)
1258 (*dev->dev_ops->tx_queue_release)(dev->data->tx_queues[i]);
1260 memif_socket_remove_device(dev);
1262 memif_disconnect(dev);
1265 rte_free(dev->process_private);
1271 memif_dev_configure(struct rte_eth_dev *dev)
1273 struct pmd_internals *pmd = dev->data->dev_private;
1279 pmd->cfg.num_c2s_rings = (pmd->role == MEMIF_ROLE_CLIENT) ?
1280 dev->data->nb_tx_queues : dev->data->nb_rx_queues;
1286 pmd->cfg.num_s2c_rings = (pmd->role == MEMIF_ROLE_CLIENT) ?
1287 dev->data->nb_rx_queues : dev->data->nb_tx_queues;
1293 memif_tx_queue_setup(struct rte_eth_dev *dev,
1295 uint16_t nb_tx_desc __rte_unused,
1296 unsigned int socket_id __rte_unused,
1297 const struct rte_eth_txconf *tx_conf __rte_unused)
1299 struct pmd_internals *pmd = dev->data->dev_private;
1300 struct memif_queue *mq;
1302 mq = rte_zmalloc("tx-queue", sizeof(struct memif_queue), 0);
1304 MIF_LOG(ERR, "Failed to allocate tx queue id: %u", qid);
1309 (pmd->role == MEMIF_ROLE_CLIENT) ? MEMIF_RING_C2S : MEMIF_RING_S2C;
1312 mq->intr_handle.fd = -1;
1313 mq->intr_handle.type = RTE_INTR_HANDLE_EXT;
1314 mq->in_port = dev->data->port_id;
1315 dev->data->tx_queues[qid] = mq;
1321 memif_rx_queue_setup(struct rte_eth_dev *dev,
1323 uint16_t nb_rx_desc __rte_unused,
1324 unsigned int socket_id __rte_unused,
1325 const struct rte_eth_rxconf *rx_conf __rte_unused,
1326 struct rte_mempool *mb_pool)
1328 struct pmd_internals *pmd = dev->data->dev_private;
1329 struct memif_queue *mq;
1331 mq = rte_zmalloc("rx-queue", sizeof(struct memif_queue), 0);
1333 MIF_LOG(ERR, "Failed to allocate rx queue id: %u", qid);
1337 mq->type = (pmd->role == MEMIF_ROLE_CLIENT) ? MEMIF_RING_S2C : MEMIF_RING_C2S;
1340 mq->intr_handle.fd = -1;
1341 mq->intr_handle.type = RTE_INTR_HANDLE_EXT;
1342 mq->mempool = mb_pool;
1343 mq->in_port = dev->data->port_id;
1344 dev->data->rx_queues[qid] = mq;
1350 memif_queue_release(void *queue)
1352 struct memif_queue *mq = (struct memif_queue *)queue;
1361 memif_link_update(struct rte_eth_dev *dev,
1362 int wait_to_complete __rte_unused)
1364 struct pmd_process_private *proc_private;
1366 if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1367 proc_private = dev->process_private;
1368 if (dev->data->dev_link.link_status == ETH_LINK_UP &&
1369 proc_private->regions_num == 0) {
1370 memif_mp_request_regions(dev);
1371 } else if (dev->data->dev_link.link_status == ETH_LINK_DOWN &&
1372 proc_private->regions_num > 0) {
1373 memif_free_regions(dev);
1380 memif_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
1382 struct pmd_internals *pmd = dev->data->dev_private;
1383 struct memif_queue *mq;
1387 stats->ipackets = 0;
1389 stats->opackets = 0;
1392 tmp = (pmd->role == MEMIF_ROLE_CLIENT) ? pmd->run.num_c2s_rings :
1393 pmd->run.num_s2c_rings;
1394 nq = (tmp < RTE_ETHDEV_QUEUE_STAT_CNTRS) ? tmp :
1395 RTE_ETHDEV_QUEUE_STAT_CNTRS;
1398 for (i = 0; i < nq; i++) {
1399 mq = dev->data->rx_queues[i];
1400 stats->q_ipackets[i] = mq->n_pkts;
1401 stats->q_ibytes[i] = mq->n_bytes;
1402 stats->ipackets += mq->n_pkts;
1403 stats->ibytes += mq->n_bytes;
1406 tmp = (pmd->role == MEMIF_ROLE_CLIENT) ? pmd->run.num_s2c_rings :
1407 pmd->run.num_c2s_rings;
1408 nq = (tmp < RTE_ETHDEV_QUEUE_STAT_CNTRS) ? tmp :
1409 RTE_ETHDEV_QUEUE_STAT_CNTRS;
1412 for (i = 0; i < nq; i++) {
1413 mq = dev->data->tx_queues[i];
1414 stats->q_opackets[i] = mq->n_pkts;
1415 stats->q_obytes[i] = mq->n_bytes;
1416 stats->opackets += mq->n_pkts;
1417 stats->obytes += mq->n_bytes;
1423 memif_stats_reset(struct rte_eth_dev *dev)
1425 struct pmd_internals *pmd = dev->data->dev_private;
1427 struct memif_queue *mq;
1429 for (i = 0; i < pmd->run.num_c2s_rings; i++) {
1430 mq = (pmd->role == MEMIF_ROLE_CLIENT) ? dev->data->tx_queues[i] :
1431 dev->data->rx_queues[i];
1435 for (i = 0; i < pmd->run.num_s2c_rings; i++) {
1436 mq = (pmd->role == MEMIF_ROLE_CLIENT) ? dev->data->rx_queues[i] :
1437 dev->data->tx_queues[i];
1446 memif_rx_queue_intr_enable(struct rte_eth_dev *dev __rte_unused,
1447 uint16_t qid __rte_unused)
1449 MIF_LOG(WARNING, "Interrupt mode not supported.");
1455 memif_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t qid __rte_unused)
1457 struct pmd_internals *pmd __rte_unused = dev->data->dev_private;
1462 static const struct eth_dev_ops ops = {
1463 .dev_start = memif_dev_start,
1464 .dev_close = memif_dev_close,
1465 .dev_infos_get = memif_dev_info,
1466 .dev_configure = memif_dev_configure,
1467 .tx_queue_setup = memif_tx_queue_setup,
1468 .rx_queue_setup = memif_rx_queue_setup,
1469 .rx_queue_release = memif_queue_release,
1470 .tx_queue_release = memif_queue_release,
1471 .rx_queue_intr_enable = memif_rx_queue_intr_enable,
1472 .rx_queue_intr_disable = memif_rx_queue_intr_disable,
1473 .link_update = memif_link_update,
1474 .stats_get = memif_stats_get,
1475 .stats_reset = memif_stats_reset,
1479 memif_create(struct rte_vdev_device *vdev, enum memif_role_t role,
1480 memif_interface_id_t id, uint32_t flags,
1481 const char *socket_filename,
1482 memif_log2_ring_size_t log2_ring_size,
1483 uint16_t pkt_buffer_size, const char *secret,
1484 struct rte_ether_addr *ether_addr)
1487 struct rte_eth_dev *eth_dev;
1488 struct rte_eth_dev_data *data;
1489 struct pmd_internals *pmd;
1490 struct pmd_process_private *process_private;
1491 const unsigned int numa_node = vdev->device.numa_node;
1492 const char *name = rte_vdev_device_name(vdev);
1494 eth_dev = rte_eth_vdev_allocate(vdev, sizeof(*pmd));
1495 if (eth_dev == NULL) {
1496 MIF_LOG(ERR, "%s: Unable to allocate device struct.", name);
1500 process_private = (struct pmd_process_private *)
1501 rte_zmalloc(name, sizeof(struct pmd_process_private),
1502 RTE_CACHE_LINE_SIZE);
1504 if (process_private == NULL) {
1505 MIF_LOG(ERR, "Failed to alloc memory for process private");
1508 eth_dev->process_private = process_private;
1510 pmd = eth_dev->data->dev_private;
1511 memset(pmd, 0, sizeof(*pmd));
1515 pmd->flags |= ETH_MEMIF_FLAG_DISABLED;
1517 /* Zero-copy flag irelevant to server. */
1518 if (pmd->role == MEMIF_ROLE_SERVER)
1519 pmd->flags &= ~ETH_MEMIF_FLAG_ZERO_COPY;
1521 ret = memif_socket_init(eth_dev, socket_filename);
1525 memset(pmd->secret, 0, sizeof(char) * ETH_MEMIF_SECRET_SIZE);
1527 strlcpy(pmd->secret, secret, sizeof(pmd->secret));
1529 pmd->cfg.log2_ring_size = log2_ring_size;
1530 /* set in .dev_configure() */
1531 pmd->cfg.num_c2s_rings = 0;
1532 pmd->cfg.num_s2c_rings = 0;
1534 pmd->cfg.pkt_buffer_size = pkt_buffer_size;
1535 rte_spinlock_init(&pmd->cc_lock);
1537 data = eth_dev->data;
1538 data->dev_private = pmd;
1539 data->numa_node = numa_node;
1540 data->dev_link = pmd_link;
1541 data->mac_addrs = ether_addr;
1542 data->promiscuous = 1;
1543 data->dev_flags |= RTE_ETH_DEV_AUTOFILL_QUEUE_XSTATS;
1545 eth_dev->dev_ops = &ops;
1546 eth_dev->device = &vdev->device;
1547 if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) {
1548 eth_dev->rx_pkt_burst = eth_memif_rx_zc;
1549 eth_dev->tx_pkt_burst = eth_memif_tx_zc;
1551 eth_dev->rx_pkt_burst = eth_memif_rx;
1552 eth_dev->tx_pkt_burst = eth_memif_tx;
1555 rte_eth_dev_probing_finish(eth_dev);
1561 memif_set_role(const char *key __rte_unused, const char *value,
1564 enum memif_role_t *role = (enum memif_role_t *)extra_args;
1566 if (strstr(value, "server") != NULL) {
1567 *role = MEMIF_ROLE_SERVER;
1568 } else if (strstr(value, "client") != NULL) {
1569 *role = MEMIF_ROLE_CLIENT;
1570 } else if (strstr(value, "master") != NULL) {
1571 MIF_LOG(NOTICE, "Role argument \"master\" is deprecated, use \"server\"");
1572 *role = MEMIF_ROLE_SERVER;
1573 } else if (strstr(value, "slave") != NULL) {
1574 MIF_LOG(NOTICE, "Role argument \"slave\" is deprecated, use \"client\"");
1575 *role = MEMIF_ROLE_CLIENT;
1577 MIF_LOG(ERR, "Unknown role: %s.", value);
1584 memif_set_zc(const char *key __rte_unused, const char *value, void *extra_args)
1586 uint32_t *flags = (uint32_t *)extra_args;
1588 if (strstr(value, "yes") != NULL) {
1589 if (!rte_mcfg_get_single_file_segments()) {
1590 MIF_LOG(ERR, "Zero-copy doesn't support multi-file segments.");
1593 *flags |= ETH_MEMIF_FLAG_ZERO_COPY;
1594 } else if (strstr(value, "no") != NULL) {
1595 *flags &= ~ETH_MEMIF_FLAG_ZERO_COPY;
1597 MIF_LOG(ERR, "Failed to parse zero-copy param: %s.", value);
1604 memif_set_id(const char *key __rte_unused, const char *value, void *extra_args)
1606 memif_interface_id_t *id = (memif_interface_id_t *)extra_args;
1608 /* even if parsing fails, 0 is a valid id */
1609 *id = strtoul(value, NULL, 10);
1614 memif_set_bs(const char *key __rte_unused, const char *value, void *extra_args)
1617 uint16_t *pkt_buffer_size = (uint16_t *)extra_args;
1619 tmp = strtoul(value, NULL, 10);
1620 if (tmp == 0 || tmp > 0xFFFF) {
1621 MIF_LOG(ERR, "Invalid buffer size: %s.", value);
1624 *pkt_buffer_size = tmp;
1629 memif_set_rs(const char *key __rte_unused, const char *value, void *extra_args)
1632 memif_log2_ring_size_t *log2_ring_size =
1633 (memif_log2_ring_size_t *)extra_args;
1635 tmp = strtoul(value, NULL, 10);
1636 if (tmp == 0 || tmp > ETH_MEMIF_MAX_LOG2_RING_SIZE) {
1637 MIF_LOG(ERR, "Invalid ring size: %s (max %u).",
1638 value, ETH_MEMIF_MAX_LOG2_RING_SIZE);
1641 *log2_ring_size = tmp;
1645 /* check if directory exists and if we have permission to read/write */
1647 memif_check_socket_filename(const char *filename)
1649 char *dir = NULL, *tmp;
1653 if (strlen(filename) >= MEMIF_SOCKET_UN_SIZE) {
1654 MIF_LOG(ERR, "Unix socket address too long (max 108).");
1658 tmp = strrchr(filename, '/');
1660 idx = tmp - filename;
1661 dir = rte_zmalloc("memif_tmp", sizeof(char) * (idx + 1), 0);
1663 MIF_LOG(ERR, "Failed to allocate memory.");
1666 strlcpy(dir, filename, sizeof(char) * (idx + 1));
1669 if (dir == NULL || (faccessat(-1, dir, F_OK | R_OK |
1670 W_OK, AT_EACCESS) < 0)) {
1671 MIF_LOG(ERR, "Invalid socket directory.");
1682 memif_set_socket_filename(const char *key __rte_unused, const char *value,
1685 const char **socket_filename = (const char **)extra_args;
1687 *socket_filename = value;
1692 memif_set_is_socket_abstract(const char *key __rte_unused, const char *value, void *extra_args)
1694 uint32_t *flags = (uint32_t *)extra_args;
1696 if (strstr(value, "yes") != NULL) {
1697 *flags |= ETH_MEMIF_FLAG_SOCKET_ABSTRACT;
1698 } else if (strstr(value, "no") != NULL) {
1699 *flags &= ~ETH_MEMIF_FLAG_SOCKET_ABSTRACT;
1701 MIF_LOG(ERR, "Failed to parse socket-abstract param: %s.", value);
1708 memif_set_mac(const char *key __rte_unused, const char *value, void *extra_args)
1710 struct rte_ether_addr *ether_addr = (struct rte_ether_addr *)extra_args;
1712 if (rte_ether_unformat_addr(value, ether_addr) < 0)
1713 MIF_LOG(WARNING, "Failed to parse mac '%s'.", value);
1718 memif_set_secret(const char *key __rte_unused, const char *value, void *extra_args)
1720 const char **secret = (const char **)extra_args;
1727 rte_pmd_memif_probe(struct rte_vdev_device *vdev)
1729 RTE_BUILD_BUG_ON(sizeof(memif_msg_t) != 128);
1730 RTE_BUILD_BUG_ON(sizeof(memif_desc_t) != 16);
1732 struct rte_kvargs *kvlist;
1733 const char *name = rte_vdev_device_name(vdev);
1734 enum memif_role_t role = MEMIF_ROLE_CLIENT;
1735 memif_interface_id_t id = 0;
1736 uint16_t pkt_buffer_size = ETH_MEMIF_DEFAULT_PKT_BUFFER_SIZE;
1737 memif_log2_ring_size_t log2_ring_size = ETH_MEMIF_DEFAULT_RING_SIZE;
1738 const char *socket_filename = ETH_MEMIF_DEFAULT_SOCKET_FILENAME;
1740 const char *secret = NULL;
1741 struct rte_ether_addr *ether_addr = rte_zmalloc("",
1742 sizeof(struct rte_ether_addr), 0);
1743 struct rte_eth_dev *eth_dev;
1745 rte_eth_random_addr(ether_addr->addr_bytes);
1747 MIF_LOG(INFO, "Initialize MEMIF: %s.", name);
1749 if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1750 eth_dev = rte_eth_dev_attach_secondary(name);
1752 MIF_LOG(ERR, "Failed to probe %s", name);
1756 eth_dev->dev_ops = &ops;
1757 eth_dev->device = &vdev->device;
1758 eth_dev->rx_pkt_burst = eth_memif_rx;
1759 eth_dev->tx_pkt_burst = eth_memif_tx;
1761 if (!rte_eal_primary_proc_alive(NULL)) {
1762 MIF_LOG(ERR, "Primary process is missing");
1766 eth_dev->process_private = (struct pmd_process_private *)
1768 sizeof(struct pmd_process_private),
1769 RTE_CACHE_LINE_SIZE);
1770 if (eth_dev->process_private == NULL) {
1772 "Failed to alloc memory for process private");
1776 rte_eth_dev_probing_finish(eth_dev);
1781 ret = rte_mp_action_register(MEMIF_MP_SEND_REGION, memif_mp_send_region);
1783 * Primary process can continue probing, but secondary process won't
1784 * be able to get memory regions information
1786 if (ret < 0 && rte_errno != EEXIST)
1787 MIF_LOG(WARNING, "Failed to register mp action callback: %s",
1788 strerror(rte_errno));
1790 /* use abstract address by default */
1791 flags |= ETH_MEMIF_FLAG_SOCKET_ABSTRACT;
1793 kvlist = rte_kvargs_parse(rte_vdev_device_args(vdev), valid_arguments);
1795 /* parse parameters */
1796 if (kvlist != NULL) {
1797 ret = rte_kvargs_process(kvlist, ETH_MEMIF_ROLE_ARG,
1798 &memif_set_role, &role);
1801 ret = rte_kvargs_process(kvlist, ETH_MEMIF_ID_ARG,
1802 &memif_set_id, &id);
1805 ret = rte_kvargs_process(kvlist, ETH_MEMIF_PKT_BUFFER_SIZE_ARG,
1806 &memif_set_bs, &pkt_buffer_size);
1809 ret = rte_kvargs_process(kvlist, ETH_MEMIF_RING_SIZE_ARG,
1810 &memif_set_rs, &log2_ring_size);
1813 ret = rte_kvargs_process(kvlist, ETH_MEMIF_SOCKET_ARG,
1814 &memif_set_socket_filename,
1815 (void *)(&socket_filename));
1818 ret = rte_kvargs_process(kvlist, ETH_MEMIF_SOCKET_ABSTRACT_ARG,
1819 &memif_set_is_socket_abstract, &flags);
1822 ret = rte_kvargs_process(kvlist, ETH_MEMIF_MAC_ARG,
1823 &memif_set_mac, ether_addr);
1826 ret = rte_kvargs_process(kvlist, ETH_MEMIF_ZC_ARG,
1827 &memif_set_zc, &flags);
1830 ret = rte_kvargs_process(kvlist, ETH_MEMIF_SECRET_ARG,
1831 &memif_set_secret, (void *)(&secret));
1836 if (!(flags & ETH_MEMIF_FLAG_SOCKET_ABSTRACT)) {
1837 ret = memif_check_socket_filename(socket_filename);
1842 /* create interface */
1843 ret = memif_create(vdev, role, id, flags, socket_filename,
1844 log2_ring_size, pkt_buffer_size, secret, ether_addr);
1848 rte_kvargs_free(kvlist);
1853 rte_pmd_memif_remove(struct rte_vdev_device *vdev)
1855 struct rte_eth_dev *eth_dev;
1857 eth_dev = rte_eth_dev_allocated(rte_vdev_device_name(vdev));
1858 if (eth_dev == NULL)
1861 return rte_eth_dev_close(eth_dev->data->port_id);
1864 static struct rte_vdev_driver pmd_memif_drv = {
1865 .probe = rte_pmd_memif_probe,
1866 .remove = rte_pmd_memif_remove,
1869 RTE_PMD_REGISTER_VDEV(net_memif, pmd_memif_drv);
1871 RTE_PMD_REGISTER_PARAM_STRING(net_memif,
1872 ETH_MEMIF_ID_ARG "=<int>"
1873 ETH_MEMIF_ROLE_ARG "=server|client"
1874 ETH_MEMIF_PKT_BUFFER_SIZE_ARG "=<int>"
1875 ETH_MEMIF_RING_SIZE_ARG "=<int>"
1876 ETH_MEMIF_SOCKET_ARG "=<string>"
1877 ETH_MEMIF_SOCKET_ABSTRACT_ARG "=yes|no"
1878 ETH_MEMIF_MAC_ARG "=xx:xx:xx:xx:xx:xx"
1879 ETH_MEMIF_ZC_ARG "=yes|no"
1880 ETH_MEMIF_SECRET_ARG "=<string>");
1882 RTE_LOG_REGISTER_DEFAULT(memif_logtype, NOTICE);