1b73c2d1a1
For i40e_xmit_pkts_vec_xx function, it checks nb_pkts to ensure nb_pkts does not cross rs_thresh. However, in i40e_xmit_fixed_burst_vec_xx function, this check will be performed again. To improve code, delete this redundant check. Suggested-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com> Signed-off-by: Feifei Wang <feifei.wang2@arm.com> Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com> Reviewed-by: Qi Zhang <qi.z.zhang@intel.com>
844 lines
31 KiB
C
844 lines
31 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2017 Intel Corporation
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*/
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#include <stdint.h>
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#include <ethdev_driver.h>
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#include <rte_malloc.h>
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#include "base/i40e_prototype.h"
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#include "base/i40e_type.h"
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#include "i40e_ethdev.h"
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#include "i40e_rxtx.h"
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#include "i40e_rxtx_vec_common.h"
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#include "i40e_rxtx_common_avx.h"
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#include <rte_vect.h>
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#ifndef __INTEL_COMPILER
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#pragma GCC diagnostic ignored "-Wcast-qual"
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#endif
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static __rte_always_inline void
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i40e_rxq_rearm(struct i40e_rx_queue *rxq)
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{
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return i40e_rxq_rearm_common(rxq, false);
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}
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#ifndef RTE_LIBRTE_I40E_16BYTE_RX_DESC
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/* Handles 32B descriptor FDIR ID processing:
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* rxdp: receive descriptor ring, required to load 2nd 16B half of each desc
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* rx_pkts: required to store metadata back to mbufs
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* pkt_idx: offset into the burst, increments in vector widths
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* desc_idx: required to select the correct shift at compile time
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*/
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static inline __m256i
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desc_fdir_processing_32b(volatile union i40e_rx_desc *rxdp,
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struct rte_mbuf **rx_pkts,
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const uint32_t pkt_idx,
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const uint32_t desc_idx)
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{
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/* 32B desc path: load rxdp.wb.qword2 for EXT_STATUS and FLEXBH_STAT */
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__m128i *rxdp_desc_0 = (void *)(&rxdp[desc_idx + 0].wb.qword2);
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__m128i *rxdp_desc_1 = (void *)(&rxdp[desc_idx + 1].wb.qword2);
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const __m128i desc_qw2_0 = _mm_load_si128(rxdp_desc_0);
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const __m128i desc_qw2_1 = _mm_load_si128(rxdp_desc_1);
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/* Mask for FLEXBH_STAT, and the FDIR_ID value to compare against. The
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* remaining data is set to all 1's to pass through data.
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*/
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const __m256i flexbh_mask = _mm256_set_epi32(-1, -1, -1, 3 << 4,
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-1, -1, -1, 3 << 4);
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const __m256i flexbh_id = _mm256_set_epi32(-1, -1, -1, 1 << 4,
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-1, -1, -1, 1 << 4);
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/* Load descriptor, check for FLEXBH bits, generate a mask for both
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* packets in the register.
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*/
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__m256i desc_qw2_0_1 =
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_mm256_inserti128_si256(_mm256_castsi128_si256(desc_qw2_0),
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desc_qw2_1, 1);
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__m256i desc_tmp_msk = _mm256_and_si256(flexbh_mask, desc_qw2_0_1);
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__m256i fdir_mask = _mm256_cmpeq_epi32(flexbh_id, desc_tmp_msk);
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__m256i fdir_data = _mm256_alignr_epi8(desc_qw2_0_1, desc_qw2_0_1, 12);
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__m256i desc_fdir_data = _mm256_and_si256(fdir_mask, fdir_data);
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/* Write data out to the mbuf. There is no store to this area of the
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* mbuf today, so we cannot combine it with another store.
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*/
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const uint32_t idx_0 = pkt_idx + desc_idx;
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const uint32_t idx_1 = pkt_idx + desc_idx + 1;
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rx_pkts[idx_0]->hash.fdir.hi = _mm256_extract_epi32(desc_fdir_data, 0);
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rx_pkts[idx_1]->hash.fdir.hi = _mm256_extract_epi32(desc_fdir_data, 4);
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/* Create mbuf flags as required for mbuf_flags layout
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* (That's high lane [1,3,5,7, 0,2,4,6] as u32 lanes).
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* Approach:
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* - Mask away bits not required from the fdir_mask
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* - Leave the PKT_FDIR_ID bit (1 << 13)
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* - Position that bit correctly based on packet number
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* - OR in the resulting bit to mbuf_flags
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*/
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RTE_BUILD_BUG_ON(RTE_MBUF_F_RX_FDIR_ID != (1 << 13));
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__m256i mbuf_flag_mask = _mm256_set_epi32(0, 0, 0, 1 << 13,
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0, 0, 0, 1 << 13);
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__m256i desc_flag_bit = _mm256_and_si256(mbuf_flag_mask, fdir_mask);
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/* For static-inline function, this will be stripped out
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* as the desc_idx is a hard-coded constant.
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*/
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switch (desc_idx) {
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case 0:
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return _mm256_alignr_epi8(desc_flag_bit, desc_flag_bit, 4);
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case 2:
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return _mm256_alignr_epi8(desc_flag_bit, desc_flag_bit, 8);
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case 4:
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return _mm256_alignr_epi8(desc_flag_bit, desc_flag_bit, 12);
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case 6:
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return desc_flag_bit;
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default:
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break;
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}
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/* NOT REACHED, see above switch returns */
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return _mm256_setzero_si256();
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}
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#endif /* RTE_LIBRTE_I40E_16BYTE_RX_DESC */
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#define PKTLEN_SHIFT 10
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/* Force inline as some compilers will not inline by default. */
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static __rte_always_inline uint16_t
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_recv_raw_pkts_vec_avx2(struct i40e_rx_queue *rxq, struct rte_mbuf **rx_pkts,
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uint16_t nb_pkts, uint8_t *split_packet)
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{
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#define RTE_I40E_DESCS_PER_LOOP_AVX 8
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const uint32_t *ptype_tbl = rxq->vsi->adapter->ptype_tbl;
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const __m256i mbuf_init = _mm256_set_epi64x(0, 0,
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0, rxq->mbuf_initializer);
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struct i40e_rx_entry *sw_ring = &rxq->sw_ring[rxq->rx_tail];
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volatile union i40e_rx_desc *rxdp = rxq->rx_ring + rxq->rx_tail;
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const int avx_aligned = ((rxq->rx_tail & 1) == 0);
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rte_prefetch0(rxdp);
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/* nb_pkts has to be floor-aligned to RTE_I40E_DESCS_PER_LOOP_AVX */
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nb_pkts = RTE_ALIGN_FLOOR(nb_pkts, RTE_I40E_DESCS_PER_LOOP_AVX);
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/* See if we need to rearm the RX queue - gives the prefetch a bit
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* of time to act
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*/
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if (rxq->rxrearm_nb > RTE_I40E_RXQ_REARM_THRESH)
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i40e_rxq_rearm(rxq);
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/* Before we start moving massive data around, check to see if
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* there is actually a packet available
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*/
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if (!(rxdp->wb.qword1.status_error_len &
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rte_cpu_to_le_32(1 << I40E_RX_DESC_STATUS_DD_SHIFT)))
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return 0;
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/* constants used in processing loop */
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const __m256i crc_adjust = _mm256_set_epi16(
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/* first descriptor */
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0, 0, 0, /* ignore non-length fields */
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-rxq->crc_len, /* sub crc on data_len */
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0, /* ignore high-16bits of pkt_len */
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-rxq->crc_len, /* sub crc on pkt_len */
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0, 0, /* ignore pkt_type field */
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/* second descriptor */
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0, 0, 0, /* ignore non-length fields */
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-rxq->crc_len, /* sub crc on data_len */
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0, /* ignore high-16bits of pkt_len */
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-rxq->crc_len, /* sub crc on pkt_len */
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0, 0 /* ignore pkt_type field */
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);
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/* 8 packets DD mask, LSB in each 32-bit value */
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const __m256i dd_check = _mm256_set1_epi32(1);
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/* 8 packets EOP mask, second-LSB in each 32-bit value */
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const __m256i eop_check = _mm256_slli_epi32(dd_check,
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I40E_RX_DESC_STATUS_EOF_SHIFT);
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/* mask to shuffle from desc. to mbuf (2 descriptors)*/
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const __m256i shuf_msk = _mm256_set_epi8(
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/* first descriptor */
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7, 6, 5, 4, /* octet 4~7, 32bits rss */
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3, 2, /* octet 2~3, low 16 bits vlan_macip */
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15, 14, /* octet 15~14, 16 bits data_len */
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0xFF, 0xFF, /* skip high 16 bits pkt_len, zero out */
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15, 14, /* octet 15~14, low 16 bits pkt_len */
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0xFF, 0xFF, /* pkt_type set as unknown */
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0xFF, 0xFF, /*pkt_type set as unknown */
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/* second descriptor */
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7, 6, 5, 4, /* octet 4~7, 32bits rss */
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3, 2, /* octet 2~3, low 16 bits vlan_macip */
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15, 14, /* octet 15~14, 16 bits data_len */
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0xFF, 0xFF, /* skip high 16 bits pkt_len, zero out */
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15, 14, /* octet 15~14, low 16 bits pkt_len */
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0xFF, 0xFF, /* pkt_type set as unknown */
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0xFF, 0xFF /*pkt_type set as unknown */
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);
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/*
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* compile-time check the above crc and shuffle layout is correct.
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* NOTE: the first field (lowest address) is given last in set_epi
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* calls above.
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*/
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RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, pkt_len) !=
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offsetof(struct rte_mbuf, rx_descriptor_fields1) + 4);
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RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, data_len) !=
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offsetof(struct rte_mbuf, rx_descriptor_fields1) + 8);
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RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, vlan_tci) !=
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offsetof(struct rte_mbuf, rx_descriptor_fields1) + 10);
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RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, hash) !=
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offsetof(struct rte_mbuf, rx_descriptor_fields1) + 12);
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/* Status/Error flag masks */
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/*
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* mask everything except RSS, flow director and VLAN flags
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* bit2 is for VLAN tag, bit11 for flow director indication
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* bit13:12 for RSS indication. Bits 3-5 of error
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* field (bits 22-24) are for IP/L4 checksum errors
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*/
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const __m256i flags_mask = _mm256_set1_epi32(
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(1 << 2) | (1 << 11) | (3 << 12) | (7 << 22));
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/*
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* data to be shuffled by result of flag mask. If VLAN bit is set,
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* (bit 2), then position 4 in this array will be used in the
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* destination
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*/
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const __m256i vlan_flags_shuf = _mm256_set_epi32(
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0, 0, RTE_MBUF_F_RX_VLAN | RTE_MBUF_F_RX_VLAN_STRIPPED, 0,
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0, 0, RTE_MBUF_F_RX_VLAN | RTE_MBUF_F_RX_VLAN_STRIPPED, 0);
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/*
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* data to be shuffled by result of flag mask, shifted down 11.
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* If RSS/FDIR bits are set, shuffle moves appropriate flags in
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* place.
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*/
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const __m256i rss_flags_shuf = _mm256_set_epi8(
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0, 0, 0, 0, 0, 0, 0, 0,
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RTE_MBUF_F_RX_RSS_HASH | RTE_MBUF_F_RX_FDIR, RTE_MBUF_F_RX_RSS_HASH, 0, 0,
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0, 0, RTE_MBUF_F_RX_FDIR, 0, /* end up 128-bits */
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0, 0, 0, 0, 0, 0, 0, 0,
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RTE_MBUF_F_RX_RSS_HASH | RTE_MBUF_F_RX_FDIR, RTE_MBUF_F_RX_RSS_HASH, 0, 0,
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0, 0, RTE_MBUF_F_RX_FDIR, 0);
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/*
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* data to be shuffled by the result of the flags mask shifted by 22
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* bits. This gives use the l3_l4 flags.
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*/
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const __m256i l3_l4_flags_shuf = _mm256_set_epi8(0, 0, 0, 0, 0, 0, 0, 0,
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/* shift right 1 bit to make sure it not exceed 255 */
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(RTE_MBUF_F_RX_OUTER_IP_CKSUM_BAD | RTE_MBUF_F_RX_L4_CKSUM_BAD |
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RTE_MBUF_F_RX_IP_CKSUM_BAD) >> 1,
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(RTE_MBUF_F_RX_OUTER_IP_CKSUM_BAD | RTE_MBUF_F_RX_L4_CKSUM_BAD |
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RTE_MBUF_F_RX_IP_CKSUM_GOOD) >> 1,
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(RTE_MBUF_F_RX_OUTER_IP_CKSUM_BAD | RTE_MBUF_F_RX_L4_CKSUM_GOOD |
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RTE_MBUF_F_RX_IP_CKSUM_BAD) >> 1,
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(RTE_MBUF_F_RX_OUTER_IP_CKSUM_BAD | RTE_MBUF_F_RX_L4_CKSUM_GOOD |
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RTE_MBUF_F_RX_IP_CKSUM_GOOD) >> 1,
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(RTE_MBUF_F_RX_L4_CKSUM_BAD | RTE_MBUF_F_RX_IP_CKSUM_BAD) >> 1,
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(RTE_MBUF_F_RX_L4_CKSUM_BAD | RTE_MBUF_F_RX_IP_CKSUM_GOOD) >> 1,
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(RTE_MBUF_F_RX_L4_CKSUM_GOOD | RTE_MBUF_F_RX_IP_CKSUM_BAD) >> 1,
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(RTE_MBUF_F_RX_L4_CKSUM_GOOD | RTE_MBUF_F_RX_IP_CKSUM_GOOD) >> 1,
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/* second 128-bits */
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0, 0, 0, 0, 0, 0, 0, 0,
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(RTE_MBUF_F_RX_OUTER_IP_CKSUM_BAD | RTE_MBUF_F_RX_L4_CKSUM_BAD |
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RTE_MBUF_F_RX_IP_CKSUM_BAD) >> 1,
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(RTE_MBUF_F_RX_OUTER_IP_CKSUM_BAD | RTE_MBUF_F_RX_L4_CKSUM_BAD |
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RTE_MBUF_F_RX_IP_CKSUM_GOOD) >> 1,
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(RTE_MBUF_F_RX_OUTER_IP_CKSUM_BAD | RTE_MBUF_F_RX_L4_CKSUM_GOOD |
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RTE_MBUF_F_RX_IP_CKSUM_BAD) >> 1,
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(RTE_MBUF_F_RX_OUTER_IP_CKSUM_BAD | RTE_MBUF_F_RX_L4_CKSUM_GOOD |
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RTE_MBUF_F_RX_IP_CKSUM_GOOD) >> 1,
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(RTE_MBUF_F_RX_L4_CKSUM_BAD | RTE_MBUF_F_RX_IP_CKSUM_BAD) >> 1,
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(RTE_MBUF_F_RX_L4_CKSUM_BAD | RTE_MBUF_F_RX_IP_CKSUM_GOOD) >> 1,
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(RTE_MBUF_F_RX_L4_CKSUM_GOOD | RTE_MBUF_F_RX_IP_CKSUM_BAD) >> 1,
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(RTE_MBUF_F_RX_L4_CKSUM_GOOD | RTE_MBUF_F_RX_IP_CKSUM_GOOD) >> 1);
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const __m256i cksum_mask = _mm256_set1_epi32(
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RTE_MBUF_F_RX_IP_CKSUM_GOOD | RTE_MBUF_F_RX_IP_CKSUM_BAD |
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RTE_MBUF_F_RX_L4_CKSUM_GOOD | RTE_MBUF_F_RX_L4_CKSUM_BAD |
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RTE_MBUF_F_RX_OUTER_IP_CKSUM_BAD);
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RTE_SET_USED(avx_aligned); /* for 32B descriptors we don't use this */
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uint16_t i, received;
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for (i = 0, received = 0; i < nb_pkts;
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i += RTE_I40E_DESCS_PER_LOOP_AVX,
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rxdp += RTE_I40E_DESCS_PER_LOOP_AVX) {
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/* step 1, copy over 8 mbuf pointers to rx_pkts array */
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_mm256_storeu_si256((void *)&rx_pkts[i],
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_mm256_loadu_si256((void *)&sw_ring[i]));
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#ifdef RTE_ARCH_X86_64
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_mm256_storeu_si256((void *)&rx_pkts[i + 4],
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_mm256_loadu_si256((void *)&sw_ring[i + 4]));
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#endif
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__m256i raw_desc0_1, raw_desc2_3, raw_desc4_5, raw_desc6_7;
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#ifdef RTE_LIBRTE_I40E_16BYTE_RX_DESC
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/* for AVX we need alignment otherwise loads are not atomic */
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if (avx_aligned) {
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/* load in descriptors, 2 at a time, in reverse order */
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raw_desc6_7 = _mm256_load_si256((void *)(rxdp + 6));
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rte_compiler_barrier();
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raw_desc4_5 = _mm256_load_si256((void *)(rxdp + 4));
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rte_compiler_barrier();
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raw_desc2_3 = _mm256_load_si256((void *)(rxdp + 2));
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rte_compiler_barrier();
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raw_desc0_1 = _mm256_load_si256((void *)(rxdp + 0));
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} else
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#endif
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do {
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const __m128i raw_desc7 = _mm_load_si128((void *)(rxdp + 7));
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rte_compiler_barrier();
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const __m128i raw_desc6 = _mm_load_si128((void *)(rxdp + 6));
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rte_compiler_barrier();
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const __m128i raw_desc5 = _mm_load_si128((void *)(rxdp + 5));
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rte_compiler_barrier();
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const __m128i raw_desc4 = _mm_load_si128((void *)(rxdp + 4));
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rte_compiler_barrier();
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const __m128i raw_desc3 = _mm_load_si128((void *)(rxdp + 3));
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rte_compiler_barrier();
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const __m128i raw_desc2 = _mm_load_si128((void *)(rxdp + 2));
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rte_compiler_barrier();
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const __m128i raw_desc1 = _mm_load_si128((void *)(rxdp + 1));
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rte_compiler_barrier();
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const __m128i raw_desc0 = _mm_load_si128((void *)(rxdp + 0));
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raw_desc6_7 = _mm256_inserti128_si256(
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_mm256_castsi128_si256(raw_desc6), raw_desc7, 1);
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raw_desc4_5 = _mm256_inserti128_si256(
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_mm256_castsi128_si256(raw_desc4), raw_desc5, 1);
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raw_desc2_3 = _mm256_inserti128_si256(
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_mm256_castsi128_si256(raw_desc2), raw_desc3, 1);
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raw_desc0_1 = _mm256_inserti128_si256(
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_mm256_castsi128_si256(raw_desc0), raw_desc1, 1);
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} while (0);
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if (split_packet) {
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int j;
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for (j = 0; j < RTE_I40E_DESCS_PER_LOOP_AVX; j++)
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rte_mbuf_prefetch_part2(rx_pkts[i + j]);
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}
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/*
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* convert descriptors 4-7 into mbufs, adjusting length and
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* re-arranging fields. Then write into the mbuf
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*/
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const __m256i len6_7 = _mm256_slli_epi32(raw_desc6_7, PKTLEN_SHIFT);
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const __m256i len4_5 = _mm256_slli_epi32(raw_desc4_5, PKTLEN_SHIFT);
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const __m256i desc6_7 = _mm256_blend_epi16(raw_desc6_7, len6_7, 0x80);
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const __m256i desc4_5 = _mm256_blend_epi16(raw_desc4_5, len4_5, 0x80);
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__m256i mb6_7 = _mm256_shuffle_epi8(desc6_7, shuf_msk);
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__m256i mb4_5 = _mm256_shuffle_epi8(desc4_5, shuf_msk);
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mb6_7 = _mm256_add_epi16(mb6_7, crc_adjust);
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mb4_5 = _mm256_add_epi16(mb4_5, crc_adjust);
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/*
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* to get packet types, shift 64-bit values down 30 bits
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* and so ptype is in lower 8-bits in each
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|
*/
|
|
const __m256i ptypes6_7 = _mm256_srli_epi64(desc6_7, 30);
|
|
const __m256i ptypes4_5 = _mm256_srli_epi64(desc4_5, 30);
|
|
const uint8_t ptype7 = _mm256_extract_epi8(ptypes6_7, 24);
|
|
const uint8_t ptype6 = _mm256_extract_epi8(ptypes6_7, 8);
|
|
const uint8_t ptype5 = _mm256_extract_epi8(ptypes4_5, 24);
|
|
const uint8_t ptype4 = _mm256_extract_epi8(ptypes4_5, 8);
|
|
mb6_7 = _mm256_insert_epi32(mb6_7, ptype_tbl[ptype7], 4);
|
|
mb6_7 = _mm256_insert_epi32(mb6_7, ptype_tbl[ptype6], 0);
|
|
mb4_5 = _mm256_insert_epi32(mb4_5, ptype_tbl[ptype5], 4);
|
|
mb4_5 = _mm256_insert_epi32(mb4_5, ptype_tbl[ptype4], 0);
|
|
/* merge the status bits into one register */
|
|
const __m256i status4_7 = _mm256_unpackhi_epi32(desc6_7,
|
|
desc4_5);
|
|
|
|
/*
|
|
* convert descriptors 0-3 into mbufs, adjusting length and
|
|
* re-arranging fields. Then write into the mbuf
|
|
*/
|
|
const __m256i len2_3 = _mm256_slli_epi32(raw_desc2_3, PKTLEN_SHIFT);
|
|
const __m256i len0_1 = _mm256_slli_epi32(raw_desc0_1, PKTLEN_SHIFT);
|
|
const __m256i desc2_3 = _mm256_blend_epi16(raw_desc2_3, len2_3, 0x80);
|
|
const __m256i desc0_1 = _mm256_blend_epi16(raw_desc0_1, len0_1, 0x80);
|
|
__m256i mb2_3 = _mm256_shuffle_epi8(desc2_3, shuf_msk);
|
|
__m256i mb0_1 = _mm256_shuffle_epi8(desc0_1, shuf_msk);
|
|
mb2_3 = _mm256_add_epi16(mb2_3, crc_adjust);
|
|
mb0_1 = _mm256_add_epi16(mb0_1, crc_adjust);
|
|
/* get the packet types */
|
|
const __m256i ptypes2_3 = _mm256_srli_epi64(desc2_3, 30);
|
|
const __m256i ptypes0_1 = _mm256_srli_epi64(desc0_1, 30);
|
|
const uint8_t ptype3 = _mm256_extract_epi8(ptypes2_3, 24);
|
|
const uint8_t ptype2 = _mm256_extract_epi8(ptypes2_3, 8);
|
|
const uint8_t ptype1 = _mm256_extract_epi8(ptypes0_1, 24);
|
|
const uint8_t ptype0 = _mm256_extract_epi8(ptypes0_1, 8);
|
|
mb2_3 = _mm256_insert_epi32(mb2_3, ptype_tbl[ptype3], 4);
|
|
mb2_3 = _mm256_insert_epi32(mb2_3, ptype_tbl[ptype2], 0);
|
|
mb0_1 = _mm256_insert_epi32(mb0_1, ptype_tbl[ptype1], 4);
|
|
mb0_1 = _mm256_insert_epi32(mb0_1, ptype_tbl[ptype0], 0);
|
|
/* merge the status bits into one register */
|
|
const __m256i status0_3 = _mm256_unpackhi_epi32(desc2_3,
|
|
desc0_1);
|
|
|
|
/*
|
|
* take the two sets of status bits and merge to one
|
|
* After merge, the packets status flags are in the
|
|
* order (hi->lo): [1, 3, 5, 7, 0, 2, 4, 6]
|
|
*/
|
|
__m256i status0_7 = _mm256_unpacklo_epi64(status4_7,
|
|
status0_3);
|
|
|
|
/* now do flag manipulation */
|
|
|
|
/* get only flag/error bits we want */
|
|
const __m256i flag_bits = _mm256_and_si256(
|
|
status0_7, flags_mask);
|
|
/* set vlan and rss flags */
|
|
const __m256i vlan_flags = _mm256_shuffle_epi8(
|
|
vlan_flags_shuf, flag_bits);
|
|
const __m256i rss_fdir_bits = _mm256_srli_epi32(flag_bits, 11);
|
|
const __m256i rss_flags = _mm256_shuffle_epi8(rss_flags_shuf,
|
|
rss_fdir_bits);
|
|
|
|
/*
|
|
* l3_l4_error flags, shuffle, then shift to correct adjustment
|
|
* of flags in flags_shuf, and finally mask out extra bits
|
|
*/
|
|
__m256i l3_l4_flags = _mm256_shuffle_epi8(l3_l4_flags_shuf,
|
|
_mm256_srli_epi32(flag_bits, 22));
|
|
l3_l4_flags = _mm256_slli_epi32(l3_l4_flags, 1);
|
|
l3_l4_flags = _mm256_and_si256(l3_l4_flags, cksum_mask);
|
|
|
|
/* merge flags */
|
|
__m256i mbuf_flags = _mm256_or_si256(l3_l4_flags,
|
|
_mm256_or_si256(rss_flags, vlan_flags));
|
|
|
|
/* If the rxq has FDIR enabled, read and process the FDIR info
|
|
* from the descriptor. This can cause more loads/stores, so is
|
|
* not always performed. Branch over the code when not enabled.
|
|
*/
|
|
if (rxq->fdir_enabled) {
|
|
#ifdef RTE_LIBRTE_I40E_16BYTE_RX_DESC
|
|
/* 16B descriptor code path:
|
|
* RSS and FDIR ID use the same offset in the desc, so
|
|
* only one can be present at a time. The code below
|
|
* identifies an FDIR ID match, and zeros the RSS value
|
|
* in the mbuf on FDIR match to keep mbuf data clean.
|
|
*/
|
|
#define FDIR_BLEND_MASK ((1 << 3) | (1 << 7))
|
|
|
|
/* Flags:
|
|
* - Take flags, shift bits to null out
|
|
* - CMPEQ with known FDIR ID, to get 0xFFFF or 0 mask
|
|
* - Strip bits from mask, leaving 0 or 1 for FDIR ID
|
|
* - Merge with mbuf_flags
|
|
*/
|
|
/* FLM = 1, FLTSTAT = 0b01, (FLM | FLTSTAT) == 3.
|
|
* Shift left by 28 to avoid having to mask.
|
|
*/
|
|
const __m256i fdir = _mm256_slli_epi32(rss_fdir_bits, 28);
|
|
const __m256i fdir_id = _mm256_set1_epi32(3 << 28);
|
|
|
|
/* As above, the fdir_mask to packet mapping is this:
|
|
* order (hi->lo): [1, 3, 5, 7, 0, 2, 4, 6]
|
|
* Then OR FDIR flags to mbuf_flags on FDIR ID hit.
|
|
*/
|
|
RTE_BUILD_BUG_ON(RTE_MBUF_F_RX_FDIR_ID != (1 << 13));
|
|
const __m256i pkt_fdir_bit = _mm256_set1_epi32(1 << 13);
|
|
const __m256i fdir_mask = _mm256_cmpeq_epi32(fdir, fdir_id);
|
|
__m256i fdir_bits = _mm256_and_si256(fdir_mask, pkt_fdir_bit);
|
|
mbuf_flags = _mm256_or_si256(mbuf_flags, fdir_bits);
|
|
|
|
/* Based on FDIR_MASK, clear the RSS or FDIR value.
|
|
* The FDIR ID value is masked to zero if not a hit,
|
|
* otherwise the mb0_1 register RSS field is zeroed.
|
|
*/
|
|
const __m256i fdir_zero_mask = _mm256_setzero_si256();
|
|
__m256i tmp0_1 = _mm256_blend_epi32(fdir_zero_mask,
|
|
fdir_mask, FDIR_BLEND_MASK);
|
|
__m256i fdir_mb0_1 = _mm256_and_si256(mb0_1, fdir_mask);
|
|
mb0_1 = _mm256_andnot_si256(tmp0_1, mb0_1);
|
|
|
|
/* Write to mbuf: no stores to combine with, so just a
|
|
* scalar store to push data here.
|
|
*/
|
|
rx_pkts[i + 0]->hash.fdir.hi = _mm256_extract_epi32(fdir_mb0_1, 3);
|
|
rx_pkts[i + 1]->hash.fdir.hi = _mm256_extract_epi32(fdir_mb0_1, 7);
|
|
|
|
/* Same as above, only shift the fdir_mask to align
|
|
* the packet FDIR mask with the FDIR_ID desc lane.
|
|
*/
|
|
__m256i tmp2_3 = _mm256_alignr_epi8(fdir_mask, fdir_mask, 12);
|
|
__m256i fdir_mb2_3 = _mm256_and_si256(mb2_3, tmp2_3);
|
|
tmp2_3 = _mm256_blend_epi32(fdir_zero_mask, tmp2_3,
|
|
FDIR_BLEND_MASK);
|
|
mb2_3 = _mm256_andnot_si256(tmp2_3, mb2_3);
|
|
rx_pkts[i + 2]->hash.fdir.hi = _mm256_extract_epi32(fdir_mb2_3, 3);
|
|
rx_pkts[i + 3]->hash.fdir.hi = _mm256_extract_epi32(fdir_mb2_3, 7);
|
|
|
|
__m256i tmp4_5 = _mm256_alignr_epi8(fdir_mask, fdir_mask, 8);
|
|
__m256i fdir_mb4_5 = _mm256_and_si256(mb4_5, tmp4_5);
|
|
tmp4_5 = _mm256_blend_epi32(fdir_zero_mask, tmp4_5,
|
|
FDIR_BLEND_MASK);
|
|
mb4_5 = _mm256_andnot_si256(tmp4_5, mb4_5);
|
|
rx_pkts[i + 4]->hash.fdir.hi = _mm256_extract_epi32(fdir_mb4_5, 3);
|
|
rx_pkts[i + 5]->hash.fdir.hi = _mm256_extract_epi32(fdir_mb4_5, 7);
|
|
|
|
__m256i tmp6_7 = _mm256_alignr_epi8(fdir_mask, fdir_mask, 4);
|
|
__m256i fdir_mb6_7 = _mm256_and_si256(mb6_7, tmp6_7);
|
|
tmp6_7 = _mm256_blend_epi32(fdir_zero_mask, tmp6_7,
|
|
FDIR_BLEND_MASK);
|
|
mb6_7 = _mm256_andnot_si256(tmp6_7, mb6_7);
|
|
rx_pkts[i + 6]->hash.fdir.hi = _mm256_extract_epi32(fdir_mb6_7, 3);
|
|
rx_pkts[i + 7]->hash.fdir.hi = _mm256_extract_epi32(fdir_mb6_7, 7);
|
|
|
|
/* End of 16B descriptor handling */
|
|
#else
|
|
/* 32B descriptor FDIR ID mark handling. Returns bits
|
|
* to be OR-ed into the mbuf olflags.
|
|
*/
|
|
__m256i fdir_add_flags;
|
|
fdir_add_flags = desc_fdir_processing_32b(rxdp, rx_pkts, i, 0);
|
|
mbuf_flags = _mm256_or_si256(mbuf_flags, fdir_add_flags);
|
|
|
|
fdir_add_flags = desc_fdir_processing_32b(rxdp, rx_pkts, i, 2);
|
|
mbuf_flags = _mm256_or_si256(mbuf_flags, fdir_add_flags);
|
|
|
|
fdir_add_flags = desc_fdir_processing_32b(rxdp, rx_pkts, i, 4);
|
|
mbuf_flags = _mm256_or_si256(mbuf_flags, fdir_add_flags);
|
|
|
|
fdir_add_flags = desc_fdir_processing_32b(rxdp, rx_pkts, i, 6);
|
|
mbuf_flags = _mm256_or_si256(mbuf_flags, fdir_add_flags);
|
|
/* End 32B desc handling */
|
|
#endif /* RTE_LIBRTE_I40E_16BYTE_RX_DESC */
|
|
|
|
} /* if() on FDIR enabled */
|
|
|
|
/*
|
|
* At this point, we have the 8 sets of flags in the low 16-bits
|
|
* of each 32-bit value in vlan0.
|
|
* We want to extract these, and merge them with the mbuf init data
|
|
* so we can do a single write to the mbuf to set the flags
|
|
* and all the other initialization fields. Extracting the
|
|
* appropriate flags means that we have to do a shift and blend for
|
|
* each mbuf before we do the write. However, we can also
|
|
* add in the previously computed rx_descriptor fields to
|
|
* make a single 256-bit write per mbuf
|
|
*/
|
|
/* check the structure matches expectations */
|
|
RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, ol_flags) !=
|
|
offsetof(struct rte_mbuf, rearm_data) + 8);
|
|
RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, rearm_data) !=
|
|
RTE_ALIGN(offsetof(struct rte_mbuf, rearm_data), 16));
|
|
/* build up data and do writes */
|
|
__m256i rearm0, rearm1, rearm2, rearm3, rearm4, rearm5,
|
|
rearm6, rearm7;
|
|
rearm6 = _mm256_blend_epi32(mbuf_init, _mm256_slli_si256(mbuf_flags, 8), 0x04);
|
|
rearm4 = _mm256_blend_epi32(mbuf_init, _mm256_slli_si256(mbuf_flags, 4), 0x04);
|
|
rearm2 = _mm256_blend_epi32(mbuf_init, mbuf_flags, 0x04);
|
|
rearm0 = _mm256_blend_epi32(mbuf_init, _mm256_srli_si256(mbuf_flags, 4), 0x04);
|
|
/* permute to add in the rx_descriptor e.g. rss fields */
|
|
rearm6 = _mm256_permute2f128_si256(rearm6, mb6_7, 0x20);
|
|
rearm4 = _mm256_permute2f128_si256(rearm4, mb4_5, 0x20);
|
|
rearm2 = _mm256_permute2f128_si256(rearm2, mb2_3, 0x20);
|
|
rearm0 = _mm256_permute2f128_si256(rearm0, mb0_1, 0x20);
|
|
/* write to mbuf */
|
|
_mm256_storeu_si256((__m256i *)&rx_pkts[i + 6]->rearm_data, rearm6);
|
|
_mm256_storeu_si256((__m256i *)&rx_pkts[i + 4]->rearm_data, rearm4);
|
|
_mm256_storeu_si256((__m256i *)&rx_pkts[i + 2]->rearm_data, rearm2);
|
|
_mm256_storeu_si256((__m256i *)&rx_pkts[i + 0]->rearm_data, rearm0);
|
|
|
|
/* repeat for the odd mbufs */
|
|
const __m256i odd_flags = _mm256_castsi128_si256(
|
|
_mm256_extracti128_si256(mbuf_flags, 1));
|
|
rearm7 = _mm256_blend_epi32(mbuf_init, _mm256_slli_si256(odd_flags, 8), 0x04);
|
|
rearm5 = _mm256_blend_epi32(mbuf_init, _mm256_slli_si256(odd_flags, 4), 0x04);
|
|
rearm3 = _mm256_blend_epi32(mbuf_init, odd_flags, 0x04);
|
|
rearm1 = _mm256_blend_epi32(mbuf_init, _mm256_srli_si256(odd_flags, 4), 0x04);
|
|
/* since odd mbufs are already in hi 128-bits use blend */
|
|
rearm7 = _mm256_blend_epi32(rearm7, mb6_7, 0xF0);
|
|
rearm5 = _mm256_blend_epi32(rearm5, mb4_5, 0xF0);
|
|
rearm3 = _mm256_blend_epi32(rearm3, mb2_3, 0xF0);
|
|
rearm1 = _mm256_blend_epi32(rearm1, mb0_1, 0xF0);
|
|
/* again write to mbufs */
|
|
_mm256_storeu_si256((__m256i *)&rx_pkts[i + 7]->rearm_data, rearm7);
|
|
_mm256_storeu_si256((__m256i *)&rx_pkts[i + 5]->rearm_data, rearm5);
|
|
_mm256_storeu_si256((__m256i *)&rx_pkts[i + 3]->rearm_data, rearm3);
|
|
_mm256_storeu_si256((__m256i *)&rx_pkts[i + 1]->rearm_data, rearm1);
|
|
|
|
/* extract and record EOP bit */
|
|
if (split_packet) {
|
|
const __m128i eop_mask = _mm_set1_epi16(
|
|
1 << I40E_RX_DESC_STATUS_EOF_SHIFT);
|
|
const __m256i eop_bits256 = _mm256_and_si256(status0_7,
|
|
eop_check);
|
|
/* pack status bits into a single 128-bit register */
|
|
const __m128i eop_bits = _mm_packus_epi32(
|
|
_mm256_castsi256_si128(eop_bits256),
|
|
_mm256_extractf128_si256(eop_bits256, 1));
|
|
/*
|
|
* flip bits, and mask out the EOP bit, which is now
|
|
* a split-packet bit i.e. !EOP, rather than EOP one.
|
|
*/
|
|
__m128i split_bits = _mm_andnot_si128(eop_bits,
|
|
eop_mask);
|
|
/*
|
|
* eop bits are out of order, so we need to shuffle them
|
|
* back into order again. In doing so, only use low 8
|
|
* bits, which acts like another pack instruction
|
|
* The original order is (hi->lo): 1,3,5,7,0,2,4,6
|
|
* [Since we use epi8, the 16-bit positions are
|
|
* multiplied by 2 in the eop_shuffle value.]
|
|
*/
|
|
__m128i eop_shuffle = _mm_set_epi8(
|
|
0xFF, 0xFF, 0xFF, 0xFF, /* zero hi 64b */
|
|
0xFF, 0xFF, 0xFF, 0xFF,
|
|
8, 0, 10, 2, /* move values to lo 64b */
|
|
12, 4, 14, 6);
|
|
split_bits = _mm_shuffle_epi8(split_bits, eop_shuffle);
|
|
*(uint64_t *)split_packet = _mm_cvtsi128_si64(split_bits);
|
|
split_packet += RTE_I40E_DESCS_PER_LOOP_AVX;
|
|
}
|
|
|
|
/* perform dd_check */
|
|
status0_7 = _mm256_and_si256(status0_7, dd_check);
|
|
status0_7 = _mm256_packs_epi32(status0_7,
|
|
_mm256_setzero_si256());
|
|
|
|
uint64_t burst = __builtin_popcountll(_mm_cvtsi128_si64(
|
|
_mm256_extracti128_si256(status0_7, 1)));
|
|
burst += __builtin_popcountll(_mm_cvtsi128_si64(
|
|
_mm256_castsi256_si128(status0_7)));
|
|
received += burst;
|
|
if (burst != RTE_I40E_DESCS_PER_LOOP_AVX)
|
|
break;
|
|
}
|
|
|
|
/* update tail pointers */
|
|
rxq->rx_tail += received;
|
|
rxq->rx_tail &= (rxq->nb_rx_desc - 1);
|
|
if ((rxq->rx_tail & 1) == 1 && received > 1) { /* keep avx2 aligned */
|
|
rxq->rx_tail--;
|
|
received--;
|
|
}
|
|
rxq->rxrearm_nb += received;
|
|
return received;
|
|
}
|
|
|
|
/*
|
|
* Notice:
|
|
* - nb_pkts < RTE_I40E_DESCS_PER_LOOP, just return no packet
|
|
*/
|
|
uint16_t
|
|
i40e_recv_pkts_vec_avx2(void *rx_queue, struct rte_mbuf **rx_pkts,
|
|
uint16_t nb_pkts)
|
|
{
|
|
return _recv_raw_pkts_vec_avx2(rx_queue, rx_pkts, nb_pkts, NULL);
|
|
}
|
|
|
|
/*
|
|
* vPMD receive routine that reassembles single burst of 32 scattered packets
|
|
* Notice:
|
|
* - nb_pkts < RTE_I40E_DESCS_PER_LOOP, just return no packet
|
|
*/
|
|
static uint16_t
|
|
i40e_recv_scattered_burst_vec_avx2(void *rx_queue, struct rte_mbuf **rx_pkts,
|
|
uint16_t nb_pkts)
|
|
{
|
|
struct i40e_rx_queue *rxq = rx_queue;
|
|
uint8_t split_flags[RTE_I40E_VPMD_RX_BURST] = {0};
|
|
|
|
/* get some new buffers */
|
|
uint16_t nb_bufs = _recv_raw_pkts_vec_avx2(rxq, rx_pkts, nb_pkts,
|
|
split_flags);
|
|
if (nb_bufs == 0)
|
|
return 0;
|
|
|
|
/* happy day case, full burst + no packets to be joined */
|
|
const uint64_t *split_fl64 = (uint64_t *)split_flags;
|
|
|
|
if (rxq->pkt_first_seg == NULL &&
|
|
split_fl64[0] == 0 && split_fl64[1] == 0 &&
|
|
split_fl64[2] == 0 && split_fl64[3] == 0)
|
|
return nb_bufs;
|
|
|
|
/* reassemble any packets that need reassembly*/
|
|
unsigned int i = 0;
|
|
|
|
if (rxq->pkt_first_seg == NULL) {
|
|
/* find the first split flag, and only reassemble then*/
|
|
while (i < nb_bufs && !split_flags[i])
|
|
i++;
|
|
if (i == nb_bufs)
|
|
return nb_bufs;
|
|
rxq->pkt_first_seg = rx_pkts[i];
|
|
}
|
|
return i + reassemble_packets(rxq, &rx_pkts[i], nb_bufs - i,
|
|
&split_flags[i]);
|
|
}
|
|
|
|
/*
|
|
* vPMD receive routine that reassembles scattered packets.
|
|
* Main receive routine that can handle arbitrary burst sizes
|
|
* Notice:
|
|
* - nb_pkts < RTE_I40E_DESCS_PER_LOOP, just return no packet
|
|
*/
|
|
uint16_t
|
|
i40e_recv_scattered_pkts_vec_avx2(void *rx_queue, struct rte_mbuf **rx_pkts,
|
|
uint16_t nb_pkts)
|
|
{
|
|
uint16_t retval = 0;
|
|
while (nb_pkts > RTE_I40E_VPMD_RX_BURST) {
|
|
uint16_t burst = i40e_recv_scattered_burst_vec_avx2(rx_queue,
|
|
rx_pkts + retval, RTE_I40E_VPMD_RX_BURST);
|
|
retval += burst;
|
|
nb_pkts -= burst;
|
|
if (burst < RTE_I40E_VPMD_RX_BURST)
|
|
return retval;
|
|
}
|
|
return retval + i40e_recv_scattered_burst_vec_avx2(rx_queue,
|
|
rx_pkts + retval, nb_pkts);
|
|
}
|
|
|
|
|
|
static inline void
|
|
vtx1(volatile struct i40e_tx_desc *txdp,
|
|
struct rte_mbuf *pkt, uint64_t flags)
|
|
{
|
|
uint64_t high_qw = (I40E_TX_DESC_DTYPE_DATA |
|
|
((uint64_t)flags << I40E_TXD_QW1_CMD_SHIFT) |
|
|
((uint64_t)pkt->data_len << I40E_TXD_QW1_TX_BUF_SZ_SHIFT));
|
|
|
|
__m128i descriptor = _mm_set_epi64x(high_qw,
|
|
pkt->buf_iova + pkt->data_off);
|
|
_mm_store_si128((__m128i *)txdp, descriptor);
|
|
}
|
|
|
|
static inline void
|
|
vtx(volatile struct i40e_tx_desc *txdp,
|
|
struct rte_mbuf **pkt, uint16_t nb_pkts, uint64_t flags)
|
|
{
|
|
const uint64_t hi_qw_tmpl = (I40E_TX_DESC_DTYPE_DATA |
|
|
((uint64_t)flags << I40E_TXD_QW1_CMD_SHIFT));
|
|
|
|
/* if unaligned on 32-bit boundary, do one to align */
|
|
if (((uintptr_t)txdp & 0x1F) != 0 && nb_pkts != 0) {
|
|
vtx1(txdp, *pkt, flags);
|
|
nb_pkts--, txdp++, pkt++;
|
|
}
|
|
|
|
/* do two at a time while possible, in bursts */
|
|
for (; nb_pkts > 3; txdp += 4, pkt += 4, nb_pkts -= 4) {
|
|
uint64_t hi_qw3 = hi_qw_tmpl |
|
|
((uint64_t)pkt[3]->data_len << I40E_TXD_QW1_TX_BUF_SZ_SHIFT);
|
|
uint64_t hi_qw2 = hi_qw_tmpl |
|
|
((uint64_t)pkt[2]->data_len << I40E_TXD_QW1_TX_BUF_SZ_SHIFT);
|
|
uint64_t hi_qw1 = hi_qw_tmpl |
|
|
((uint64_t)pkt[1]->data_len << I40E_TXD_QW1_TX_BUF_SZ_SHIFT);
|
|
uint64_t hi_qw0 = hi_qw_tmpl |
|
|
((uint64_t)pkt[0]->data_len << I40E_TXD_QW1_TX_BUF_SZ_SHIFT);
|
|
|
|
__m256i desc2_3 = _mm256_set_epi64x(
|
|
hi_qw3, pkt[3]->buf_iova + pkt[3]->data_off,
|
|
hi_qw2, pkt[2]->buf_iova + pkt[2]->data_off);
|
|
__m256i desc0_1 = _mm256_set_epi64x(
|
|
hi_qw1, pkt[1]->buf_iova + pkt[1]->data_off,
|
|
hi_qw0, pkt[0]->buf_iova + pkt[0]->data_off);
|
|
_mm256_store_si256((void *)(txdp + 2), desc2_3);
|
|
_mm256_store_si256((void *)txdp, desc0_1);
|
|
}
|
|
|
|
/* do any last ones */
|
|
while (nb_pkts) {
|
|
vtx1(txdp, *pkt, flags);
|
|
txdp++, pkt++, nb_pkts--;
|
|
}
|
|
}
|
|
|
|
static inline uint16_t
|
|
i40e_xmit_fixed_burst_vec_avx2(void *tx_queue, struct rte_mbuf **tx_pkts,
|
|
uint16_t nb_pkts)
|
|
{
|
|
struct i40e_tx_queue *txq = (struct i40e_tx_queue *)tx_queue;
|
|
volatile struct i40e_tx_desc *txdp;
|
|
struct i40e_tx_entry *txep;
|
|
uint16_t n, nb_commit, tx_id;
|
|
uint64_t flags = I40E_TD_CMD;
|
|
uint64_t rs = I40E_TX_DESC_CMD_RS | I40E_TD_CMD;
|
|
|
|
if (txq->nb_tx_free < txq->tx_free_thresh)
|
|
i40e_tx_free_bufs(txq);
|
|
|
|
nb_commit = nb_pkts = (uint16_t)RTE_MIN(txq->nb_tx_free, nb_pkts);
|
|
if (unlikely(nb_pkts == 0))
|
|
return 0;
|
|
|
|
tx_id = txq->tx_tail;
|
|
txdp = &txq->tx_ring[tx_id];
|
|
txep = &txq->sw_ring[tx_id];
|
|
|
|
txq->nb_tx_free = (uint16_t)(txq->nb_tx_free - nb_pkts);
|
|
|
|
n = (uint16_t)(txq->nb_tx_desc - tx_id);
|
|
if (nb_commit >= n) {
|
|
tx_backlog_entry(txep, tx_pkts, n);
|
|
|
|
vtx(txdp, tx_pkts, n - 1, flags);
|
|
tx_pkts += (n - 1);
|
|
txdp += (n - 1);
|
|
|
|
vtx1(txdp, *tx_pkts++, rs);
|
|
|
|
nb_commit = (uint16_t)(nb_commit - n);
|
|
|
|
tx_id = 0;
|
|
txq->tx_next_rs = (uint16_t)(txq->tx_rs_thresh - 1);
|
|
|
|
/* avoid reach the end of ring */
|
|
txdp = &txq->tx_ring[tx_id];
|
|
txep = &txq->sw_ring[tx_id];
|
|
}
|
|
|
|
tx_backlog_entry(txep, tx_pkts, nb_commit);
|
|
|
|
vtx(txdp, tx_pkts, nb_commit, flags);
|
|
|
|
tx_id = (uint16_t)(tx_id + nb_commit);
|
|
if (tx_id > txq->tx_next_rs) {
|
|
txq->tx_ring[txq->tx_next_rs].cmd_type_offset_bsz |=
|
|
rte_cpu_to_le_64(((uint64_t)I40E_TX_DESC_CMD_RS) <<
|
|
I40E_TXD_QW1_CMD_SHIFT);
|
|
txq->tx_next_rs =
|
|
(uint16_t)(txq->tx_next_rs + txq->tx_rs_thresh);
|
|
}
|
|
|
|
txq->tx_tail = tx_id;
|
|
|
|
I40E_PCI_REG_WC_WRITE(txq->qtx_tail, txq->tx_tail);
|
|
|
|
return nb_pkts;
|
|
}
|
|
|
|
uint16_t
|
|
i40e_xmit_pkts_vec_avx2(void *tx_queue, struct rte_mbuf **tx_pkts,
|
|
uint16_t nb_pkts)
|
|
{
|
|
uint16_t nb_tx = 0;
|
|
struct i40e_tx_queue *txq = (struct i40e_tx_queue *)tx_queue;
|
|
|
|
while (nb_pkts) {
|
|
uint16_t ret, num;
|
|
|
|
/* cross rs_thresh boundary is not allowed */
|
|
num = (uint16_t)RTE_MIN(nb_pkts, txq->tx_rs_thresh);
|
|
ret = i40e_xmit_fixed_burst_vec_avx2(tx_queue, &tx_pkts[nb_tx],
|
|
num);
|
|
nb_tx += ret;
|
|
nb_pkts -= ret;
|
|
if (ret < num)
|
|
break;
|
|
}
|
|
|
|
return nb_tx;
|
|
}
|