256 lines
6.4 KiB
C
256 lines
6.4 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2016 Intel Corporation.
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* Copyright(c) 2017 IBM Corporation.
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* All rights reserved.
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*/
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#ifndef _L3FWD_ALTIVEC_H_
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#define _L3FWD_ALTIVEC_H_
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#include "l3fwd.h"
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#include "l3fwd_common.h"
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/*
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* Update source and destination MAC addresses in the ethernet header.
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* Perform RFC1812 checks and updates for IPV4 packets.
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*/
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static inline void
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processx4_step3(struct rte_mbuf *pkt[FWDSTEP], uint16_t dst_port[FWDSTEP])
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{
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vector unsigned int te[FWDSTEP];
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vector unsigned int ve[FWDSTEP];
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vector unsigned int *p[FWDSTEP];
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p[0] = rte_pktmbuf_mtod(pkt[0], vector unsigned int *);
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p[1] = rte_pktmbuf_mtod(pkt[1], vector unsigned int *);
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p[2] = rte_pktmbuf_mtod(pkt[2], vector unsigned int *);
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p[3] = rte_pktmbuf_mtod(pkt[3], vector unsigned int *);
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ve[0] = (vector unsigned int)val_eth[dst_port[0]];
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te[0] = *p[0];
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ve[1] = (vector unsigned int)val_eth[dst_port[1]];
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te[1] = *p[1];
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ve[2] = (vector unsigned int)val_eth[dst_port[2]];
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te[2] = *p[2];
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ve[3] = (vector unsigned int)val_eth[dst_port[3]];
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te[3] = *p[3];
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/* Update first 12 bytes, keep rest bytes intact. */
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te[0] = (vector unsigned int)vec_sel(
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(vector unsigned short)ve[0],
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(vector unsigned short)te[0],
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(vector unsigned short) {0, 0, 0, 0,
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0, 0, 0xffff, 0xffff});
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te[1] = (vector unsigned int)vec_sel(
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(vector unsigned short)ve[1],
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(vector unsigned short)te[1],
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(vector unsigned short) {0, 0, 0, 0,
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0, 0, 0xffff, 0xffff});
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te[2] = (vector unsigned int)vec_sel(
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(vector unsigned short)ve[2],
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(vector unsigned short)te[2],
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(vector unsigned short) {0, 0, 0, 0, 0,
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0, 0xffff, 0xffff});
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te[3] = (vector unsigned int)vec_sel(
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(vector unsigned short)ve[3],
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(vector unsigned short)te[3],
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(vector unsigned short) {0, 0, 0, 0,
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0, 0, 0xffff, 0xffff});
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*p[0] = te[0];
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*p[1] = te[1];
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*p[2] = te[2];
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*p[3] = te[3];
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rfc1812_process((struct ipv4_hdr *)((struct ether_hdr *)p[0] + 1),
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&dst_port[0], pkt[0]->packet_type);
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rfc1812_process((struct ipv4_hdr *)((struct ether_hdr *)p[1] + 1),
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&dst_port[1], pkt[1]->packet_type);
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rfc1812_process((struct ipv4_hdr *)((struct ether_hdr *)p[2] + 1),
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&dst_port[2], pkt[2]->packet_type);
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rfc1812_process((struct ipv4_hdr *)((struct ether_hdr *)p[3] + 1),
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&dst_port[3], pkt[3]->packet_type);
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}
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/*
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* Group consecutive packets with the same destination port in bursts of 4.
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* Suppose we have array of destination ports:
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* dst_port[] = {a, b, c, d,, e, ... }
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* dp1 should contain: <a, b, c, d>, dp2: <b, c, d, e>.
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* We doing 4 comparisons at once and the result is 4 bit mask.
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* This mask is used as an index into prebuild array of pnum values.
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*/
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static inline uint16_t *
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port_groupx4(uint16_t pn[FWDSTEP + 1], uint16_t *lp, vector unsigned short dp1,
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vector unsigned short dp2)
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{
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union {
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uint16_t u16[FWDSTEP + 1];
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uint64_t u64;
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} *pnum = (void *)pn;
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int32_t v;
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v = vec_any_eq(dp1, dp2);
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/* update last port counter. */
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lp[0] += gptbl[v].lpv;
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/* if dest port value has changed. */
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if (v != GRPMSK) {
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pnum->u64 = gptbl[v].pnum;
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pnum->u16[FWDSTEP] = 1;
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lp = pnum->u16 + gptbl[v].idx;
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}
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return lp;
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}
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/**
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* Process one packet:
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* Update source and destination MAC addresses in the ethernet header.
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* Perform RFC1812 checks and updates for IPV4 packets.
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*/
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static inline void
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process_packet(struct rte_mbuf *pkt, uint16_t *dst_port)
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{
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struct ether_hdr *eth_hdr;
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vector unsigned int te, ve;
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eth_hdr = rte_pktmbuf_mtod(pkt, struct ether_hdr *);
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te = *(vector unsigned int *)eth_hdr;
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ve = (vector unsigned int)val_eth[dst_port[0]];
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rfc1812_process((struct ipv4_hdr *)(eth_hdr + 1), dst_port,
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pkt->packet_type);
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/* dynamically vec_sel te and ve for MASK_ETH (0x3f) */
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te = (vector unsigned int)vec_sel(
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(vector unsigned short)ve,
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(vector unsigned short)te,
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(vector unsigned short){0, 0, 0, 0,
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0, 0, 0xffff, 0xffff});
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*(vector unsigned int *)eth_hdr = te;
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}
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/**
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* Send packets burst from pkts_burst to the ports in dst_port array
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*/
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static __rte_always_inline void
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send_packets_multi(struct lcore_conf *qconf, struct rte_mbuf **pkts_burst,
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uint16_t dst_port[MAX_PKT_BURST], int nb_rx)
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{
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int32_t k;
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int j = 0;
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uint16_t dlp;
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uint16_t *lp;
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uint16_t pnum[MAX_PKT_BURST + 1];
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/*
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* Finish packet processing and group consecutive
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* packets with the same destination port.
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*/
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k = RTE_ALIGN_FLOOR(nb_rx, FWDSTEP);
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if (k != 0) {
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vector unsigned short dp1, dp2;
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lp = pnum;
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lp[0] = 1;
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processx4_step3(pkts_burst, dst_port);
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/* dp1: <d[0], d[1], d[2], d[3], ... > */
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dp1 = *(vector unsigned short *)dst_port;
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for (j = FWDSTEP; j != k; j += FWDSTEP) {
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processx4_step3(&pkts_burst[j], &dst_port[j]);
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/*
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* dp2:
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* <d[j-3], d[j-2], d[j-1], d[j], ... >
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*/
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dp2 = *((vector unsigned short *)
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&dst_port[j - FWDSTEP + 1]);
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lp = port_groupx4(&pnum[j - FWDSTEP], lp, dp1, dp2);
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/*
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* dp1:
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* <d[j], d[j+1], d[j+2], d[j+3], ... >
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*/
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dp1 = vec_sro(dp2, (vector unsigned char) {
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, (FWDSTEP - 1) * sizeof(dst_port[0])});
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}
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/*
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* dp2: <d[j-3], d[j-2], d[j-1], d[j-1], ... >
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*/
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dp2 = vec_perm(dp1, (vector unsigned short){},
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(vector unsigned char){0xf9});
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lp = port_groupx4(&pnum[j - FWDSTEP], lp, dp1, dp2);
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/*
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* remove values added by the last repeated
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* dst port.
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*/
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lp[0]--;
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dlp = dst_port[j - 1];
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} else {
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/* set dlp and lp to the never used values. */
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dlp = BAD_PORT - 1;
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lp = pnum + MAX_PKT_BURST;
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}
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/* Process up to last 3 packets one by one. */
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switch (nb_rx % FWDSTEP) {
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case 3:
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process_packet(pkts_burst[j], dst_port + j);
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GROUP_PORT_STEP(dlp, dst_port, lp, pnum, j);
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j++;
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/* fall-through */
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case 2:
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process_packet(pkts_burst[j], dst_port + j);
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GROUP_PORT_STEP(dlp, dst_port, lp, pnum, j);
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j++;
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/* fall-through */
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case 1:
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process_packet(pkts_burst[j], dst_port + j);
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GROUP_PORT_STEP(dlp, dst_port, lp, pnum, j);
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j++;
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}
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/*
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* Send packets out, through destination port.
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* Consecutive packets with the same destination port
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* are already grouped together.
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* If destination port for the packet equals BAD_PORT,
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* then free the packet without sending it out.
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*/
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for (j = 0; j < nb_rx; j += k) {
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int32_t m;
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uint16_t pn;
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pn = dst_port[j];
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k = pnum[j];
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if (likely(pn != BAD_PORT))
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send_packetsx4(qconf, pn, pkts_burst + j, k);
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else
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for (m = j; m != j + k; m++)
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rte_pktmbuf_free(pkts_burst[m]);
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}
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}
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#endif /* _L3FWD_ALTIVEC_H_ */
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