numam-dpdk/drivers/net/thunderx/nicvf_rxtx.c

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/*
* BSD LICENSE
*
* Copyright (C) Cavium networks Ltd. 2016.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Cavium networks nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <unistd.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <rte_atomic.h>
#include <rte_branch_prediction.h>
#include <rte_byteorder.h>
#include <rte_common.h>
#include <rte_cycles.h>
#include <rte_errno.h>
#include <rte_ethdev.h>
#include <rte_ether.h>
#include <rte_log.h>
#include <rte_mbuf.h>
#include <rte_prefetch.h>
#include "base/nicvf_plat.h"
#include "nicvf_ethdev.h"
#include "nicvf_rxtx.h"
#include "nicvf_logs.h"
static inline void __hot
fill_sq_desc_header(union sq_entry_t *entry, struct rte_mbuf *pkt)
{
/* Local variable sqe to avoid read from sq desc memory*/
union sq_entry_t sqe;
uint64_t ol_flags;
/* Fill SQ header descriptor */
sqe.buff[0] = 0;
sqe.hdr.subdesc_type = SQ_DESC_TYPE_HEADER;
/* Number of sub-descriptors following this one */
sqe.hdr.subdesc_cnt = pkt->nb_segs;
sqe.hdr.tot_len = pkt->pkt_len;
ol_flags = pkt->ol_flags & NICVF_TX_OFFLOAD_MASK;
if (unlikely(ol_flags)) {
/* L4 cksum */
if (ol_flags & PKT_TX_TCP_CKSUM)
sqe.hdr.csum_l4 = SEND_L4_CSUM_TCP;
else if (ol_flags & PKT_TX_UDP_CKSUM)
sqe.hdr.csum_l4 = SEND_L4_CSUM_UDP;
else
sqe.hdr.csum_l4 = SEND_L4_CSUM_DISABLE;
sqe.hdr.l4_offset = pkt->l3_len + pkt->l2_len;
/* L3 cksum */
if (ol_flags & PKT_TX_IP_CKSUM) {
sqe.hdr.csum_l3 = 1;
sqe.hdr.l3_offset = pkt->l2_len;
}
}
entry->buff[0] = sqe.buff[0];
}
void __hot
nicvf_single_pool_free_xmited_buffers(struct nicvf_txq *sq)
{
int j = 0;
uint32_t curr_head;
uint32_t head = sq->head;
struct rte_mbuf **txbuffs = sq->txbuffs;
void *obj_p[NICVF_MAX_TX_FREE_THRESH] __rte_cache_aligned;
curr_head = nicvf_addr_read(sq->sq_head) >> 4;
while (head != curr_head) {
if (txbuffs[head])
obj_p[j++] = txbuffs[head];
head = (head + 1) & sq->qlen_mask;
}
rte_mempool_put_bulk(sq->pool, obj_p, j);
sq->head = curr_head;
sq->xmit_bufs -= j;
NICVF_TX_ASSERT(sq->xmit_bufs >= 0);
}
void __hot
nicvf_multi_pool_free_xmited_buffers(struct nicvf_txq *sq)
{
uint32_t n = 0;
uint32_t curr_head;
uint32_t head = sq->head;
struct rte_mbuf **txbuffs = sq->txbuffs;
curr_head = nicvf_addr_read(sq->sq_head) >> 4;
while (head != curr_head) {
if (txbuffs[head]) {
rte_pktmbuf_free_seg(txbuffs[head]);
n++;
}
head = (head + 1) & sq->qlen_mask;
}
sq->head = curr_head;
sq->xmit_bufs -= n;
NICVF_TX_ASSERT(sq->xmit_bufs >= 0);
}
static inline uint32_t __hot
nicvf_free_tx_desc(struct nicvf_txq *sq)
{
return ((sq->head - sq->tail - 1) & sq->qlen_mask);
}
/* Send Header + Packet */
#define TX_DESC_PER_PKT 2
static inline uint32_t __hot
nicvf_free_xmitted_buffers(struct nicvf_txq *sq, struct rte_mbuf **tx_pkts,
uint16_t nb_pkts)
{
uint32_t free_desc = nicvf_free_tx_desc(sq);
if (free_desc < nb_pkts * TX_DESC_PER_PKT ||
sq->xmit_bufs > sq->tx_free_thresh) {
if (unlikely(sq->pool == NULL))
sq->pool = tx_pkts[0]->pool;
sq->pool_free(sq);
/* Freed now, let see the number of free descs again */
free_desc = nicvf_free_tx_desc(sq);
}
return free_desc;
}
uint16_t __hot
nicvf_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
{
int i;
uint32_t free_desc;
uint32_t tail;
struct nicvf_txq *sq = tx_queue;
union sq_entry_t *desc_ptr = sq->desc;
struct rte_mbuf **txbuffs = sq->txbuffs;
struct rte_mbuf *pkt;
uint32_t qlen_mask = sq->qlen_mask;
tail = sq->tail;
free_desc = nicvf_free_xmitted_buffers(sq, tx_pkts, nb_pkts);
for (i = 0; i < nb_pkts && (int)free_desc >= TX_DESC_PER_PKT; i++) {
pkt = tx_pkts[i];
txbuffs[tail] = NULL;
fill_sq_desc_header(desc_ptr + tail, pkt);
tail = (tail + 1) & qlen_mask;
txbuffs[tail] = pkt;
fill_sq_desc_gather(desc_ptr + tail, pkt);
tail = (tail + 1) & qlen_mask;
free_desc -= TX_DESC_PER_PKT;
}
sq->tail = tail;
sq->xmit_bufs += i;
rte_wmb();
/* Inform HW to xmit the packets */
nicvf_addr_write(sq->sq_door, i * TX_DESC_PER_PKT);
return i;
}
uint16_t __hot
nicvf_xmit_pkts_multiseg(void *tx_queue, struct rte_mbuf **tx_pkts,
uint16_t nb_pkts)
{
int i, k;
uint32_t used_desc, next_used_desc, used_bufs, free_desc, tail;
struct nicvf_txq *sq = tx_queue;
union sq_entry_t *desc_ptr = sq->desc;
struct rte_mbuf **txbuffs = sq->txbuffs;
struct rte_mbuf *pkt, *seg;
uint32_t qlen_mask = sq->qlen_mask;
uint16_t nb_segs;
tail = sq->tail;
used_desc = 0;
used_bufs = 0;
free_desc = nicvf_free_xmitted_buffers(sq, tx_pkts, nb_pkts);
for (i = 0; i < nb_pkts; i++) {
pkt = tx_pkts[i];
nb_segs = pkt->nb_segs;
next_used_desc = used_desc + nb_segs + 1;
if (next_used_desc > free_desc)
break;
used_desc = next_used_desc;
used_bufs += nb_segs;
txbuffs[tail] = NULL;
fill_sq_desc_header(desc_ptr + tail, pkt);
tail = (tail + 1) & qlen_mask;
txbuffs[tail] = pkt;
fill_sq_desc_gather(desc_ptr + tail, pkt);
tail = (tail + 1) & qlen_mask;
seg = pkt->next;
for (k = 1; k < nb_segs; k++) {
txbuffs[tail] = seg;
fill_sq_desc_gather(desc_ptr + tail, seg);
tail = (tail + 1) & qlen_mask;
seg = seg->next;
}
}
sq->tail = tail;
sq->xmit_bufs += used_bufs;
rte_wmb();
/* Inform HW to xmit the packets */
nicvf_addr_write(sq->sq_door, used_desc);
return nb_pkts;
}
static const uint32_t ptype_table[16][16] __rte_cache_aligned = {
[L3_NONE][L4_NONE] = RTE_PTYPE_UNKNOWN,
[L3_NONE][L4_IPSEC_ESP] = RTE_PTYPE_UNKNOWN,
[L3_NONE][L4_IPFRAG] = RTE_PTYPE_L4_FRAG,
[L3_NONE][L4_IPCOMP] = RTE_PTYPE_UNKNOWN,
[L3_NONE][L4_TCP] = RTE_PTYPE_L4_TCP,
[L3_NONE][L4_UDP_PASS1] = RTE_PTYPE_L4_UDP,
[L3_NONE][L4_GRE] = RTE_PTYPE_TUNNEL_GRE,
[L3_NONE][L4_UDP_PASS2] = RTE_PTYPE_L4_UDP,
[L3_NONE][L4_UDP_GENEVE] = RTE_PTYPE_TUNNEL_GENEVE,
[L3_NONE][L4_UDP_VXLAN] = RTE_PTYPE_TUNNEL_VXLAN,
[L3_NONE][L4_NVGRE] = RTE_PTYPE_TUNNEL_NVGRE,
[L3_IPV4][L4_NONE] = RTE_PTYPE_L3_IPV4 | RTE_PTYPE_UNKNOWN,
[L3_IPV4][L4_IPSEC_ESP] = RTE_PTYPE_L3_IPV4 | RTE_PTYPE_L3_IPV4,
[L3_IPV4][L4_IPFRAG] = RTE_PTYPE_L3_IPV4 | RTE_PTYPE_L4_FRAG,
[L3_IPV4][L4_IPCOMP] = RTE_PTYPE_L3_IPV4 | RTE_PTYPE_UNKNOWN,
[L3_IPV4][L4_TCP] = RTE_PTYPE_L3_IPV4 | RTE_PTYPE_L4_TCP,
[L3_IPV4][L4_UDP_PASS1] = RTE_PTYPE_L3_IPV4 | RTE_PTYPE_L4_UDP,
[L3_IPV4][L4_GRE] = RTE_PTYPE_L3_IPV4 | RTE_PTYPE_TUNNEL_GRE,
[L3_IPV4][L4_UDP_PASS2] = RTE_PTYPE_L3_IPV4 | RTE_PTYPE_L4_UDP,
[L3_IPV4][L4_UDP_GENEVE] = RTE_PTYPE_L3_IPV4 | RTE_PTYPE_TUNNEL_GENEVE,
[L3_IPV4][L4_UDP_VXLAN] = RTE_PTYPE_L3_IPV4 | RTE_PTYPE_TUNNEL_VXLAN,
[L3_IPV4][L4_NVGRE] = RTE_PTYPE_L3_IPV4 | RTE_PTYPE_TUNNEL_NVGRE,
[L3_IPV4_OPT][L4_NONE] = RTE_PTYPE_L3_IPV4_EXT | RTE_PTYPE_UNKNOWN,
[L3_IPV4_OPT][L4_IPSEC_ESP] = RTE_PTYPE_L3_IPV4_EXT |
RTE_PTYPE_L3_IPV4,
[L3_IPV4_OPT][L4_IPFRAG] = RTE_PTYPE_L3_IPV4_EXT | RTE_PTYPE_L4_FRAG,
[L3_IPV4_OPT][L4_IPCOMP] = RTE_PTYPE_L3_IPV4_EXT | RTE_PTYPE_UNKNOWN,
[L3_IPV4_OPT][L4_TCP] = RTE_PTYPE_L3_IPV4_EXT | RTE_PTYPE_L4_TCP,
[L3_IPV4_OPT][L4_UDP_PASS1] = RTE_PTYPE_L3_IPV4_EXT | RTE_PTYPE_L4_UDP,
[L3_IPV4_OPT][L4_GRE] = RTE_PTYPE_L3_IPV4_EXT | RTE_PTYPE_TUNNEL_GRE,
[L3_IPV4_OPT][L4_UDP_PASS2] = RTE_PTYPE_L3_IPV4_EXT | RTE_PTYPE_L4_UDP,
[L3_IPV4_OPT][L4_UDP_GENEVE] = RTE_PTYPE_L3_IPV4_EXT |
RTE_PTYPE_TUNNEL_GENEVE,
[L3_IPV4_OPT][L4_UDP_VXLAN] = RTE_PTYPE_L3_IPV4_EXT |
RTE_PTYPE_TUNNEL_VXLAN,
[L3_IPV4_OPT][L4_NVGRE] = RTE_PTYPE_L3_IPV4_EXT |
RTE_PTYPE_TUNNEL_NVGRE,
[L3_IPV6][L4_NONE] = RTE_PTYPE_L3_IPV6 | RTE_PTYPE_UNKNOWN,
[L3_IPV6][L4_IPSEC_ESP] = RTE_PTYPE_L3_IPV6 | RTE_PTYPE_L3_IPV4,
[L3_IPV6][L4_IPFRAG] = RTE_PTYPE_L3_IPV6 | RTE_PTYPE_L4_FRAG,
[L3_IPV6][L4_IPCOMP] = RTE_PTYPE_L3_IPV6 | RTE_PTYPE_UNKNOWN,
[L3_IPV6][L4_TCP] = RTE_PTYPE_L3_IPV6 | RTE_PTYPE_L4_TCP,
[L3_IPV6][L4_UDP_PASS1] = RTE_PTYPE_L3_IPV6 | RTE_PTYPE_L4_UDP,
[L3_IPV6][L4_GRE] = RTE_PTYPE_L3_IPV6 | RTE_PTYPE_TUNNEL_GRE,
[L3_IPV6][L4_UDP_PASS2] = RTE_PTYPE_L3_IPV6 | RTE_PTYPE_L4_UDP,
[L3_IPV6][L4_UDP_GENEVE] = RTE_PTYPE_L3_IPV6 | RTE_PTYPE_TUNNEL_GENEVE,
[L3_IPV6][L4_UDP_VXLAN] = RTE_PTYPE_L3_IPV6 | RTE_PTYPE_TUNNEL_VXLAN,
[L3_IPV6][L4_NVGRE] = RTE_PTYPE_L3_IPV6 | RTE_PTYPE_TUNNEL_NVGRE,
[L3_IPV6_OPT][L4_NONE] = RTE_PTYPE_L3_IPV6_EXT | RTE_PTYPE_UNKNOWN,
[L3_IPV6_OPT][L4_IPSEC_ESP] = RTE_PTYPE_L3_IPV6_EXT |
RTE_PTYPE_L3_IPV4,
[L3_IPV6_OPT][L4_IPFRAG] = RTE_PTYPE_L3_IPV6_EXT | RTE_PTYPE_L4_FRAG,
[L3_IPV6_OPT][L4_IPCOMP] = RTE_PTYPE_L3_IPV6_EXT | RTE_PTYPE_UNKNOWN,
[L3_IPV6_OPT][L4_TCP] = RTE_PTYPE_L3_IPV6_EXT | RTE_PTYPE_L4_TCP,
[L3_IPV6_OPT][L4_UDP_PASS1] = RTE_PTYPE_L3_IPV6_EXT | RTE_PTYPE_L4_UDP,
[L3_IPV6_OPT][L4_GRE] = RTE_PTYPE_L3_IPV6_EXT | RTE_PTYPE_TUNNEL_GRE,
[L3_IPV6_OPT][L4_UDP_PASS2] = RTE_PTYPE_L3_IPV6_EXT | RTE_PTYPE_L4_UDP,
[L3_IPV6_OPT][L4_UDP_GENEVE] = RTE_PTYPE_L3_IPV6_EXT |
RTE_PTYPE_TUNNEL_GENEVE,
[L3_IPV6_OPT][L4_UDP_VXLAN] = RTE_PTYPE_L3_IPV6_EXT |
RTE_PTYPE_TUNNEL_VXLAN,
[L3_IPV6_OPT][L4_NVGRE] = RTE_PTYPE_L3_IPV6_EXT |
RTE_PTYPE_TUNNEL_NVGRE,
[L3_ET_STOP][L4_NONE] = RTE_PTYPE_UNKNOWN,
[L3_ET_STOP][L4_IPSEC_ESP] = RTE_PTYPE_UNKNOWN,
[L3_ET_STOP][L4_IPFRAG] = RTE_PTYPE_L4_FRAG,
[L3_ET_STOP][L4_IPCOMP] = RTE_PTYPE_UNKNOWN,
[L3_ET_STOP][L4_TCP] = RTE_PTYPE_L4_TCP,
[L3_ET_STOP][L4_UDP_PASS1] = RTE_PTYPE_L4_UDP,
[L3_ET_STOP][L4_GRE] = RTE_PTYPE_TUNNEL_GRE,
[L3_ET_STOP][L4_UDP_PASS2] = RTE_PTYPE_L4_UDP,
[L3_ET_STOP][L4_UDP_GENEVE] = RTE_PTYPE_TUNNEL_GENEVE,
[L3_ET_STOP][L4_UDP_VXLAN] = RTE_PTYPE_TUNNEL_VXLAN,
[L3_ET_STOP][L4_NVGRE] = RTE_PTYPE_TUNNEL_NVGRE,
[L3_OTHER][L4_NONE] = RTE_PTYPE_UNKNOWN,
[L3_OTHER][L4_IPSEC_ESP] = RTE_PTYPE_UNKNOWN,
[L3_OTHER][L4_IPFRAG] = RTE_PTYPE_L4_FRAG,
[L3_OTHER][L4_IPCOMP] = RTE_PTYPE_UNKNOWN,
[L3_OTHER][L4_TCP] = RTE_PTYPE_L4_TCP,
[L3_OTHER][L4_UDP_PASS1] = RTE_PTYPE_L4_UDP,
[L3_OTHER][L4_GRE] = RTE_PTYPE_TUNNEL_GRE,
[L3_OTHER][L4_UDP_PASS2] = RTE_PTYPE_L4_UDP,
[L3_OTHER][L4_UDP_GENEVE] = RTE_PTYPE_TUNNEL_GENEVE,
[L3_OTHER][L4_UDP_VXLAN] = RTE_PTYPE_TUNNEL_VXLAN,
[L3_OTHER][L4_NVGRE] = RTE_PTYPE_TUNNEL_NVGRE,
};
static inline uint32_t __hot
nicvf_rx_classify_pkt(cqe_rx_word0_t cqe_rx_w0)
{
return ptype_table[cqe_rx_w0.l3_type][cqe_rx_w0.l4_type];
}
static inline int __hot
nicvf_fill_rbdr(struct nicvf_rxq *rxq, int to_fill)
{
int i;
uint32_t ltail, next_tail;
struct nicvf_rbdr *rbdr = rxq->shared_rbdr;
uint64_t mbuf_phys_off = rxq->mbuf_phys_off;
struct rbdr_entry_t *desc = rbdr->desc;
uint32_t qlen_mask = rbdr->qlen_mask;
uintptr_t door = rbdr->rbdr_door;
void *obj_p[NICVF_MAX_RX_FREE_THRESH] __rte_cache_aligned;
if (unlikely(rte_mempool_get_bulk(rxq->pool, obj_p, to_fill) < 0)) {
rxq->nic->eth_dev->data->rx_mbuf_alloc_failed += to_fill;
return 0;
}
NICVF_RX_ASSERT((unsigned int)to_fill <= (qlen_mask -
(nicvf_addr_read(rbdr->rbdr_status) & NICVF_RBDR_COUNT_MASK)));
next_tail = __atomic_fetch_add(&rbdr->next_tail, to_fill,
__ATOMIC_ACQUIRE);
ltail = next_tail;
for (i = 0; i < to_fill; i++) {
struct rbdr_entry_t *entry = desc + (ltail & qlen_mask);
entry->full_addr = nicvf_mbuff_virt2phy((uintptr_t)obj_p[i],
mbuf_phys_off);
ltail++;
}
while (__atomic_load_n(&rbdr->tail, __ATOMIC_RELAXED) != next_tail)
rte_pause();
__atomic_store_n(&rbdr->tail, ltail, __ATOMIC_RELEASE);
nicvf_addr_write(door, to_fill);
return to_fill;
}
static inline int32_t __hot
nicvf_rx_pkts_to_process(struct nicvf_rxq *rxq, uint16_t nb_pkts,
int32_t available_space)
{
if (unlikely(available_space < nb_pkts))
rxq->available_space = nicvf_addr_read(rxq->cq_status)
& NICVF_CQ_CQE_COUNT_MASK;
return RTE_MIN(nb_pkts, available_space);
}
static inline void __hot
nicvf_rx_offload(cqe_rx_word0_t cqe_rx_w0, cqe_rx_word2_t cqe_rx_w2,
struct rte_mbuf *pkt)
{
if (likely(cqe_rx_w0.rss_alg)) {
pkt->hash.rss = cqe_rx_w2.rss_tag;
pkt->ol_flags |= PKT_RX_RSS_HASH;
}
}
uint16_t __hot
nicvf_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
{
uint32_t i, to_process;
struct cqe_rx_t *cqe_rx;
struct rte_mbuf *pkt;
cqe_rx_word0_t cqe_rx_w0;
cqe_rx_word1_t cqe_rx_w1;
cqe_rx_word2_t cqe_rx_w2;
cqe_rx_word3_t cqe_rx_w3;
struct nicvf_rxq *rxq = rx_queue;
union cq_entry_t *desc = rxq->desc;
const uint64_t cqe_mask = rxq->qlen_mask;
uint64_t rb0_ptr, mbuf_phys_off = rxq->mbuf_phys_off;
uint32_t cqe_head = rxq->head & cqe_mask;
int32_t available_space = rxq->available_space;
uint8_t port_id = rxq->port_id;
const uint8_t rbptr_offset = rxq->rbptr_offset;
to_process = nicvf_rx_pkts_to_process(rxq, nb_pkts, available_space);
for (i = 0; i < to_process; i++) {
rte_prefetch_non_temporal(&desc[cqe_head + 2]);
cqe_rx = (struct cqe_rx_t *)&desc[cqe_head];
NICVF_RX_ASSERT(((struct cq_entry_type_t *)cqe_rx)->cqe_type
== CQE_TYPE_RX);
NICVF_LOAD_PAIR(cqe_rx_w0.u64, cqe_rx_w1.u64, cqe_rx);
NICVF_LOAD_PAIR(cqe_rx_w2.u64, cqe_rx_w3.u64, &cqe_rx->word2);
rb0_ptr = *((uint64_t *)cqe_rx + rbptr_offset);
pkt = (struct rte_mbuf *)nicvf_mbuff_phy2virt
(rb0_ptr - cqe_rx_w1.align_pad, mbuf_phys_off);
pkt->ol_flags = 0;
pkt->port = port_id;
pkt->data_len = cqe_rx_w3.rb0_sz;
pkt->data_off = RTE_PKTMBUF_HEADROOM + cqe_rx_w1.align_pad;
pkt->nb_segs = 1;
pkt->pkt_len = cqe_rx_w3.rb0_sz;
pkt->packet_type = nicvf_rx_classify_pkt(cqe_rx_w0);
nicvf_rx_offload(cqe_rx_w0, cqe_rx_w2, pkt);
rte_mbuf_refcnt_set(pkt, 1);
rx_pkts[i] = pkt;
cqe_head = (cqe_head + 1) & cqe_mask;
nicvf_prefetch_store_keep(pkt);
}
if (likely(to_process)) {
rxq->available_space -= to_process;
rxq->head = cqe_head;
nicvf_addr_write(rxq->cq_door, to_process);
rxq->recv_buffers += to_process;
if (rxq->recv_buffers > rxq->rx_free_thresh) {
rxq->recv_buffers -= nicvf_fill_rbdr(rxq,
rxq->rx_free_thresh);
NICVF_RX_ASSERT(rxq->recv_buffers >= 0);
}
}
return to_process;
}
static inline uint16_t __hot
nicvf_process_cq_mseg_entry(struct cqe_rx_t *cqe_rx,
uint64_t mbuf_phys_off, uint8_t port_id,
struct rte_mbuf **rx_pkt, uint8_t rbptr_offset)
{
struct rte_mbuf *pkt, *seg, *prev;
cqe_rx_word0_t cqe_rx_w0;
cqe_rx_word1_t cqe_rx_w1;
cqe_rx_word2_t cqe_rx_w2;
uint16_t *rb_sz, nb_segs, seg_idx;
uint64_t *rb_ptr;
NICVF_LOAD_PAIR(cqe_rx_w0.u64, cqe_rx_w1.u64, cqe_rx);
NICVF_RX_ASSERT(cqe_rx_w0.cqe_type == CQE_TYPE_RX);
cqe_rx_w2 = cqe_rx->word2;
rb_sz = &cqe_rx->word3.rb0_sz;
rb_ptr = (uint64_t *)cqe_rx + rbptr_offset;
nb_segs = cqe_rx_w0.rb_cnt;
pkt = (struct rte_mbuf *)nicvf_mbuff_phy2virt
(rb_ptr[0] - cqe_rx_w1.align_pad, mbuf_phys_off);
pkt->ol_flags = 0;
pkt->port = port_id;
pkt->data_off = RTE_PKTMBUF_HEADROOM + cqe_rx_w1.align_pad;
pkt->nb_segs = nb_segs;
pkt->pkt_len = cqe_rx_w1.pkt_len;
pkt->data_len = rb_sz[nicvf_frag_num(0)];
rte_mbuf_refcnt_set(pkt, 1);
pkt->packet_type = nicvf_rx_classify_pkt(cqe_rx_w0);
nicvf_rx_offload(cqe_rx_w0, cqe_rx_w2, pkt);
*rx_pkt = pkt;
prev = pkt;
for (seg_idx = 1; seg_idx < nb_segs; seg_idx++) {
seg = (struct rte_mbuf *)nicvf_mbuff_phy2virt
(rb_ptr[seg_idx], mbuf_phys_off);
prev->next = seg;
seg->data_len = rb_sz[nicvf_frag_num(seg_idx)];
seg->port = port_id;
seg->data_off = RTE_PKTMBUF_HEADROOM;
rte_mbuf_refcnt_set(seg, 1);
prev = seg;
}
prev->next = NULL;
return nb_segs;
}
uint16_t __hot
nicvf_recv_pkts_multiseg(void *rx_queue, struct rte_mbuf **rx_pkts,
uint16_t nb_pkts)
{
union cq_entry_t *cq_entry;
struct cqe_rx_t *cqe_rx;
struct nicvf_rxq *rxq = rx_queue;
union cq_entry_t *desc = rxq->desc;
const uint64_t cqe_mask = rxq->qlen_mask;
uint64_t mbuf_phys_off = rxq->mbuf_phys_off;
uint32_t i, to_process, cqe_head, buffers_consumed = 0;
int32_t available_space = rxq->available_space;
uint16_t nb_segs;
const uint8_t port_id = rxq->port_id;
const uint8_t rbptr_offset = rxq->rbptr_offset;
cqe_head = rxq->head & cqe_mask;
to_process = nicvf_rx_pkts_to_process(rxq, nb_pkts, available_space);
for (i = 0; i < to_process; i++) {
rte_prefetch_non_temporal(&desc[cqe_head + 2]);
cq_entry = &desc[cqe_head];
cqe_rx = (struct cqe_rx_t *)cq_entry;
nb_segs = nicvf_process_cq_mseg_entry(cqe_rx, mbuf_phys_off,
port_id, rx_pkts + i, rbptr_offset);
buffers_consumed += nb_segs;
cqe_head = (cqe_head + 1) & cqe_mask;
nicvf_prefetch_store_keep(rx_pkts[i]);
}
if (likely(to_process)) {
rxq->available_space -= to_process;
rxq->head = cqe_head;
nicvf_addr_write(rxq->cq_door, to_process);
rxq->recv_buffers += buffers_consumed;
if (rxq->recv_buffers > rxq->rx_free_thresh) {
rxq->recv_buffers -=
nicvf_fill_rbdr(rxq, rxq->rx_free_thresh);
NICVF_RX_ASSERT(rxq->recv_buffers >= 0);
}
}
return to_process;
}