/* SPDX-License-Identifier: BSD-3-Clause * Copyright(c) 2020 Intel Corporation */ #include "iavf_rxtx_vec_common.h" #include #ifndef __INTEL_COMPILER #pragma GCC diagnostic ignored "-Wcast-qual" #endif #define IAVF_DESCS_PER_LOOP_AVX 8 #define PKTLEN_SHIFT 10 static __rte_always_inline void iavf_rxq_rearm(struct iavf_rx_queue *rxq) { int i; uint16_t rx_id; volatile union iavf_rx_desc *rxdp; struct rte_mempool_cache *cache = rte_mempool_default_cache(rxq->mp, rte_lcore_id()); struct rte_mbuf **rxp = &rxq->sw_ring[rxq->rxrearm_start]; rxdp = rxq->rx_ring + rxq->rxrearm_start; if (unlikely(!cache)) return iavf_rxq_rearm_common(rxq, true); /* We need to pull 'n' more MBUFs into the software ring from mempool * We inline the mempool function here, so we can vectorize the copy * from the cache into the shadow ring. */ /* Can this be satisfied from the cache? */ if (cache->len < IAVF_RXQ_REARM_THRESH) { /* No. Backfill the cache first, and then fill from it */ uint32_t req = IAVF_RXQ_REARM_THRESH + (cache->size - cache->len); /* How many do we require i.e. number to fill the cache + the request */ int ret = rte_mempool_ops_dequeue_bulk (rxq->mp, &cache->objs[cache->len], req); if (ret == 0) { cache->len += req; } else { if (rxq->rxrearm_nb + IAVF_RXQ_REARM_THRESH >= rxq->nb_rx_desc) { __m128i dma_addr0; dma_addr0 = _mm_setzero_si128(); for (i = 0; i < IAVF_VPMD_DESCS_PER_LOOP; i++) { rxp[i] = &rxq->fake_mbuf; _mm_storeu_si128((__m128i *)&rxdp[i].read, dma_addr0); } } rte_eth_devices[rxq->port_id].data->rx_mbuf_alloc_failed += IAVF_RXQ_REARM_THRESH; return; } } const __m512i iova_offsets = _mm512_set1_epi64(offsetof (struct rte_mbuf, buf_iova)); const __m512i headroom = _mm512_set1_epi64(RTE_PKTMBUF_HEADROOM); #ifndef RTE_LIBRTE_IAVF_16BYTE_RX_DESC /* to shuffle the addresses to correct slots. Values 4-7 will contain * zeros, so use 7 for a zero-value. */ const __m512i permute_idx = _mm512_set_epi64(7, 7, 3, 1, 7, 7, 2, 0); #else const __m512i permute_idx = _mm512_set_epi64(7, 3, 6, 2, 5, 1, 4, 0); #endif /* Initialize the mbufs in vector, process 8 mbufs in one loop, taking * from mempool cache and populating both shadow and HW rings */ for (i = 0; i < IAVF_RXQ_REARM_THRESH / IAVF_DESCS_PER_LOOP_AVX; i++) { const __m512i mbuf_ptrs = _mm512_loadu_si512 (&cache->objs[cache->len - IAVF_DESCS_PER_LOOP_AVX]); _mm512_storeu_si512(rxp, mbuf_ptrs); const __m512i iova_base_addrs = _mm512_i64gather_epi64 (_mm512_add_epi64(mbuf_ptrs, iova_offsets), 0, /* base */ 1 /* scale */); const __m512i iova_addrs = _mm512_add_epi64(iova_base_addrs, headroom); #ifndef RTE_LIBRTE_IAVF_16BYTE_RX_DESC const __m512i iovas0 = _mm512_castsi256_si512 (_mm512_extracti64x4_epi64(iova_addrs, 0)); const __m512i iovas1 = _mm512_castsi256_si512 (_mm512_extracti64x4_epi64(iova_addrs, 1)); /* permute leaves desc 2-3 addresses in header address slots 0-1 * but these are ignored by driver since header split not * enabled. Similarly for desc 6 & 7. */ const __m512i desc0_1 = _mm512_permutexvar_epi64 (permute_idx, iovas0); const __m512i desc2_3 = _mm512_bsrli_epi128(desc0_1, 8); const __m512i desc4_5 = _mm512_permutexvar_epi64 (permute_idx, iovas1); const __m512i desc6_7 = _mm512_bsrli_epi128(desc4_5, 8); _mm512_storeu_si512((void *)rxdp, desc0_1); _mm512_storeu_si512((void *)(rxdp + 2), desc2_3); _mm512_storeu_si512((void *)(rxdp + 4), desc4_5); _mm512_storeu_si512((void *)(rxdp + 6), desc6_7); #else /* permute leaves desc 4-7 addresses in header address slots 0-3 * but these are ignored by driver since header split not * enabled. */ const __m512i desc0_3 = _mm512_permutexvar_epi64(permute_idx, iova_addrs); const __m512i desc4_7 = _mm512_bsrli_epi128(desc0_3, 8); _mm512_storeu_si512((void *)rxdp, desc0_3); _mm512_storeu_si512((void *)(rxdp + 4), desc4_7); #endif rxp += IAVF_DESCS_PER_LOOP_AVX; rxdp += IAVF_DESCS_PER_LOOP_AVX; cache->len -= IAVF_DESCS_PER_LOOP_AVX; } rxq->rxrearm_start += IAVF_RXQ_REARM_THRESH; if (rxq->rxrearm_start >= rxq->nb_rx_desc) rxq->rxrearm_start = 0; rxq->rxrearm_nb -= IAVF_RXQ_REARM_THRESH; rx_id = (uint16_t)((rxq->rxrearm_start == 0) ? (rxq->nb_rx_desc - 1) : (rxq->rxrearm_start - 1)); /* Update the tail pointer on the NIC */ IAVF_PCI_REG_WRITE(rxq->qrx_tail, rx_id); } #define IAVF_RX_LEN_MASK 0x80808080 static inline uint16_t _iavf_recv_raw_pkts_vec_avx512(struct iavf_rx_queue *rxq, struct rte_mbuf **rx_pkts, uint16_t nb_pkts, uint8_t *split_packet) { const uint32_t *type_table = rxq->vsi->adapter->ptype_tbl; const __m256i mbuf_init = _mm256_set_epi64x(0, 0, 0, rxq->mbuf_initializer); struct rte_mbuf **sw_ring = &rxq->sw_ring[rxq->rx_tail]; volatile union iavf_rx_desc *rxdp = rxq->rx_ring + rxq->rx_tail; rte_prefetch0(rxdp); /* nb_pkts has to be floor-aligned to IAVF_DESCS_PER_LOOP_AVX */ nb_pkts = RTE_ALIGN_FLOOR(nb_pkts, IAVF_DESCS_PER_LOOP_AVX); /* See if we need to rearm the RX queue - gives the prefetch a bit * of time to act */ if (rxq->rxrearm_nb > IAVF_RXQ_REARM_THRESH) iavf_rxq_rearm(rxq); /* Before we start moving massive data around, check to see if * there is actually a packet available */ if (!(rxdp->wb.qword1.status_error_len & rte_cpu_to_le_32(1 << IAVF_RX_DESC_STATUS_DD_SHIFT))) return 0; /* constants used in processing loop */ const __m512i crc_adjust = _mm512_set_epi32 (/* 1st descriptor */ 0, /* ignore non-length fields */ -rxq->crc_len, /* sub crc on data_len */ -rxq->crc_len, /* sub crc on pkt_len */ 0, /* ignore pkt_type field */ /* 2nd descriptor */ 0, /* ignore non-length fields */ -rxq->crc_len, /* sub crc on data_len */ -rxq->crc_len, /* sub crc on pkt_len */ 0, /* ignore pkt_type field */ /* 3rd descriptor */ 0, /* ignore non-length fields */ -rxq->crc_len, /* sub crc on data_len */ -rxq->crc_len, /* sub crc on pkt_len */ 0, /* ignore pkt_type field */ /* 4th descriptor */ 0, /* ignore non-length fields */ -rxq->crc_len, /* sub crc on data_len */ -rxq->crc_len, /* sub crc on pkt_len */ 0 /* ignore pkt_type field */ ); /* 8 packets DD mask, LSB in each 32-bit value */ const __m256i dd_check = _mm256_set1_epi32(1); /* 8 packets EOP mask, second-LSB in each 32-bit value */ const __m256i eop_check = _mm256_slli_epi32(dd_check, IAVF_RX_DESC_STATUS_EOF_SHIFT); /* mask to shuffle from desc. to mbuf (4 descriptors)*/ const __m512i shuf_msk = _mm512_set_epi32 (/* 1st descriptor */ 0x07060504, /* octet 4~7, 32bits rss */ 0x03020F0E, /* octet 2~3, low 16 bits vlan_macip */ /* octet 15~14, 16 bits data_len */ 0xFFFF0F0E, /* skip high 16 bits pkt_len, zero out */ /* octet 15~14, low 16 bits pkt_len */ 0xFFFFFFFF, /* pkt_type set as unknown */ /* 2nd descriptor */ 0x07060504, /* octet 4~7, 32bits rss */ 0x03020F0E, /* octet 2~3, low 16 bits vlan_macip */ /* octet 15~14, 16 bits data_len */ 0xFFFF0F0E, /* skip high 16 bits pkt_len, zero out */ /* octet 15~14, low 16 bits pkt_len */ 0xFFFFFFFF, /* pkt_type set as unknown */ /* 3rd descriptor */ 0x07060504, /* octet 4~7, 32bits rss */ 0x03020F0E, /* octet 2~3, low 16 bits vlan_macip */ /* octet 15~14, 16 bits data_len */ 0xFFFF0F0E, /* skip high 16 bits pkt_len, zero out */ /* octet 15~14, low 16 bits pkt_len */ 0xFFFFFFFF, /* pkt_type set as unknown */ /* 4th descriptor */ 0x07060504, /* octet 4~7, 32bits rss */ 0x03020F0E, /* octet 2~3, low 16 bits vlan_macip */ /* octet 15~14, 16 bits data_len */ 0xFFFF0F0E, /* skip high 16 bits pkt_len, zero out */ /* octet 15~14, low 16 bits pkt_len */ 0xFFFFFFFF /* pkt_type set as unknown */ ); /** * compile-time check the above crc and shuffle layout is correct. * NOTE: the first field (lowest address) is given last in set_epi * calls above. */ RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, pkt_len) != offsetof(struct rte_mbuf, rx_descriptor_fields1) + 4); RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, data_len) != offsetof(struct rte_mbuf, rx_descriptor_fields1) + 8); RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, vlan_tci) != offsetof(struct rte_mbuf, rx_descriptor_fields1) + 10); RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, hash) != offsetof(struct rte_mbuf, rx_descriptor_fields1) + 12); /* Status/Error flag masks */ /** * mask everything except RSS, flow director and VLAN flags * bit2 is for VLAN tag, bit11 for flow director indication * bit13:12 for RSS indication. Bits 3-5 of error * field (bits 22-24) are for IP/L4 checksum errors */ const __m256i flags_mask = _mm256_set1_epi32((1 << 2) | (1 << 11) | (3 << 12) | (7 << 22)); /** * data to be shuffled by result of flag mask. If VLAN bit is set, * (bit 2), then position 4 in this array will be used in the * destination */ const __m256i vlan_flags_shuf = _mm256_set_epi32(0, 0, PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED, 0, 0, 0, PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED, 0); /** * data to be shuffled by result of flag mask, shifted down 11. * If RSS/FDIR bits are set, shuffle moves appropriate flags in * place. */ const __m256i rss_flags_shuf = _mm256_set_epi8(0, 0, 0, 0, 0, 0, 0, 0, PKT_RX_RSS_HASH | PKT_RX_FDIR, PKT_RX_RSS_HASH, 0, 0, 0, 0, PKT_RX_FDIR, 0,/* end up 128-bits */ 0, 0, 0, 0, 0, 0, 0, 0, PKT_RX_RSS_HASH | PKT_RX_FDIR, PKT_RX_RSS_HASH, 0, 0, 0, 0, PKT_RX_FDIR, 0); /** * data to be shuffled by the result of the flags mask shifted by 22 * bits. This gives use the l3_l4 flags. */ const __m256i l3_l4_flags_shuf = _mm256_set_epi8(0, 0, 0, 0, 0, 0, 0, 0, /* shift right 1 bit to make sure it not exceed 255 */ (PKT_RX_EIP_CKSUM_BAD | PKT_RX_L4_CKSUM_BAD | PKT_RX_IP_CKSUM_BAD) >> 1, (PKT_RX_IP_CKSUM_GOOD | PKT_RX_EIP_CKSUM_BAD | PKT_RX_L4_CKSUM_BAD) >> 1, (PKT_RX_EIP_CKSUM_BAD | PKT_RX_IP_CKSUM_BAD) >> 1, (PKT_RX_IP_CKSUM_GOOD | PKT_RX_EIP_CKSUM_BAD) >> 1, (PKT_RX_L4_CKSUM_BAD | PKT_RX_IP_CKSUM_BAD) >> 1, (PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_BAD) >> 1, PKT_RX_IP_CKSUM_BAD >> 1, (PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_GOOD) >> 1, /* second 128-bits */ 0, 0, 0, 0, 0, 0, 0, 0, (PKT_RX_EIP_CKSUM_BAD | PKT_RX_L4_CKSUM_BAD | PKT_RX_IP_CKSUM_BAD) >> 1, (PKT_RX_IP_CKSUM_GOOD | PKT_RX_EIP_CKSUM_BAD | PKT_RX_L4_CKSUM_BAD) >> 1, (PKT_RX_EIP_CKSUM_BAD | PKT_RX_IP_CKSUM_BAD) >> 1, (PKT_RX_IP_CKSUM_GOOD | PKT_RX_EIP_CKSUM_BAD) >> 1, (PKT_RX_L4_CKSUM_BAD | PKT_RX_IP_CKSUM_BAD) >> 1, (PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_BAD) >> 1, PKT_RX_IP_CKSUM_BAD >> 1, (PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_GOOD) >> 1); const __m256i cksum_mask = _mm256_set1_epi32(PKT_RX_IP_CKSUM_GOOD | PKT_RX_IP_CKSUM_BAD | PKT_RX_L4_CKSUM_GOOD | PKT_RX_L4_CKSUM_BAD | PKT_RX_EIP_CKSUM_BAD); uint16_t i, received; for (i = 0, received = 0; i < nb_pkts; i += IAVF_DESCS_PER_LOOP_AVX, rxdp += IAVF_DESCS_PER_LOOP_AVX) { /* step 1, copy over 8 mbuf pointers to rx_pkts array */ _mm256_storeu_si256((void *)&rx_pkts[i], _mm256_loadu_si256((void *)&sw_ring[i])); #ifdef RTE_ARCH_X86_64 _mm256_storeu_si256 ((void *)&rx_pkts[i + 4], _mm256_loadu_si256((void *)&sw_ring[i + 4])); #endif __m512i raw_desc0_3, raw_desc4_7; const __m128i raw_desc7 = _mm_load_si128((void *)(rxdp + 7)); rte_compiler_barrier(); const __m128i raw_desc6 = _mm_load_si128((void *)(rxdp + 6)); rte_compiler_barrier(); const __m128i raw_desc5 = _mm_load_si128((void *)(rxdp + 5)); rte_compiler_barrier(); const __m128i raw_desc4 = _mm_load_si128((void *)(rxdp + 4)); rte_compiler_barrier(); const __m128i raw_desc3 = _mm_load_si128((void *)(rxdp + 3)); rte_compiler_barrier(); const __m128i raw_desc2 = _mm_load_si128((void *)(rxdp + 2)); rte_compiler_barrier(); const __m128i raw_desc1 = _mm_load_si128((void *)(rxdp + 1)); rte_compiler_barrier(); const __m128i raw_desc0 = _mm_load_si128((void *)(rxdp + 0)); raw_desc4_7 = _mm512_broadcast_i32x4(raw_desc4); raw_desc4_7 = _mm512_inserti32x4(raw_desc4_7, raw_desc5, 1); raw_desc4_7 = _mm512_inserti32x4(raw_desc4_7, raw_desc6, 2); raw_desc4_7 = _mm512_inserti32x4(raw_desc4_7, raw_desc7, 3); raw_desc0_3 = _mm512_broadcast_i32x4(raw_desc0); raw_desc0_3 = _mm512_inserti32x4(raw_desc0_3, raw_desc1, 1); raw_desc0_3 = _mm512_inserti32x4(raw_desc0_3, raw_desc2, 2); raw_desc0_3 = _mm512_inserti32x4(raw_desc0_3, raw_desc3, 3); if (split_packet) { int j; for (j = 0; j < IAVF_DESCS_PER_LOOP_AVX; j++) rte_mbuf_prefetch_part2(rx_pkts[i + j]); } /** * convert descriptors 4-7 into mbufs, adjusting length and * re-arranging fields. Then write into the mbuf */ const __m512i len4_7 = _mm512_slli_epi32(raw_desc4_7, PKTLEN_SHIFT); const __m512i desc4_7 = _mm512_mask_blend_epi16(IAVF_RX_LEN_MASK, raw_desc4_7, len4_7); __m512i mb4_7 = _mm512_shuffle_epi8(desc4_7, shuf_msk); mb4_7 = _mm512_add_epi32(mb4_7, crc_adjust); /** * to get packet types, shift 64-bit values down 30 bits * and so ptype is in lower 8-bits in each */ const __m512i ptypes4_7 = _mm512_srli_epi64(desc4_7, 30); const __m256i ptypes6_7 = _mm512_extracti64x4_epi64(ptypes4_7, 1); const __m256i ptypes4_5 = _mm512_extracti64x4_epi64(ptypes4_7, 0); 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); const __m512i ptype4_7 = _mm512_set_epi32 (0, 0, 0, type_table[ptype7], 0, 0, 0, type_table[ptype6], 0, 0, 0, type_table[ptype5], 0, 0, 0, type_table[ptype4]); mb4_7 = _mm512_mask_blend_epi32(0x1111, mb4_7, ptype4_7); /** * convert descriptors 0-3 into mbufs, adjusting length and * re-arranging fields. Then write into the mbuf */ const __m512i len0_3 = _mm512_slli_epi32(raw_desc0_3, PKTLEN_SHIFT); const __m512i desc0_3 = _mm512_mask_blend_epi16(IAVF_RX_LEN_MASK, raw_desc0_3, len0_3); __m512i mb0_3 = _mm512_shuffle_epi8(desc0_3, shuf_msk); mb0_3 = _mm512_add_epi32(mb0_3, crc_adjust); /* get the packet types */ const __m512i ptypes0_3 = _mm512_srli_epi64(desc0_3, 30); const __m256i ptypes2_3 = _mm512_extracti64x4_epi64(ptypes0_3, 1); const __m256i ptypes0_1 = _mm512_extracti64x4_epi64(ptypes0_3, 0); 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); const __m512i ptype0_3 = _mm512_set_epi32 (0, 0, 0, type_table[ptype3], 0, 0, 0, type_table[ptype2], 0, 0, 0, type_table[ptype1], 0, 0, 0, type_table[ptype0]); mb0_3 = _mm512_mask_blend_epi32(0x1111, mb0_3, ptype0_3); /** * use permute/extract to get status content * After the operations, the packets status flags are in the * order (hi->lo): [1, 3, 5, 7, 0, 2, 4, 6] */ /* merge the status bits into one register */ const __m512i status_permute_msk = _mm512_set_epi32 (0, 0, 0, 0, 0, 0, 0, 0, 22, 30, 6, 14, 18, 26, 2, 10); const __m512i raw_status0_7 = _mm512_permutex2var_epi32 (raw_desc4_7, status_permute_msk, raw_desc0_3); __m256i status0_7 = _mm512_extracti64x4_epi64 (raw_status0_7, 0); /* 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_flags = _mm256_shuffle_epi8(rss_flags_shuf, _mm256_srli_epi32(flag_bits, 11)); /** * 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 */ const __m256i mbuf_flags = _mm256_or_si256(l3_l4_flags, _mm256_or_si256(rss_flags, vlan_flags)); /** * 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; const __m256i mb4_5 = _mm512_extracti64x4_epi64(mb4_7, 0); const __m256i mb6_7 = _mm512_extracti64x4_epi64(mb4_7, 1); const __m256i mb0_1 = _mm512_extracti64x4_epi64(mb0_3, 0); const __m256i mb2_3 = _mm512_extracti64x4_epi64(mb0_3, 1); 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 << IAVF_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(/* zero hi 64b */ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, /* move values to lo 64b */ 8, 0, 10, 2, 12, 4, 14, 6); split_bits = _mm_shuffle_epi8(split_bits, eop_shuffle); *(uint64_t *)split_packet = _mm_cvtsi128_si64(split_bits); split_packet += IAVF_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 != IAVF_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 aligned */ rxq->rx_tail--; received--; } rxq->rxrearm_nb += received; return received; } static inline __m256i flex_rxd_to_fdir_flags_vec_avx512(const __m256i fdir_id0_7) { #define FDID_MIS_MAGIC 0xFFFFFFFF RTE_BUILD_BUG_ON(PKT_RX_FDIR != (1 << 2)); RTE_BUILD_BUG_ON(PKT_RX_FDIR_ID != (1 << 13)); const __m256i pkt_fdir_bit = _mm256_set1_epi32(PKT_RX_FDIR | PKT_RX_FDIR_ID); /* desc->flow_id field == 0xFFFFFFFF means fdir mismatch */ const __m256i fdir_mis_mask = _mm256_set1_epi32(FDID_MIS_MAGIC); __m256i fdir_mask = _mm256_cmpeq_epi32(fdir_id0_7, fdir_mis_mask); /* this XOR op results to bit-reverse the fdir_mask */ fdir_mask = _mm256_xor_si256(fdir_mask, fdir_mis_mask); const __m256i fdir_flags = _mm256_and_si256(fdir_mask, pkt_fdir_bit); return fdir_flags; } static inline uint16_t _iavf_recv_raw_pkts_vec_avx512_flex_rxd(struct iavf_rx_queue *rxq, struct rte_mbuf **rx_pkts, uint16_t nb_pkts, uint8_t *split_packet) { struct iavf_adapter *adapter = rxq->vsi->adapter; uint64_t offloads = adapter->dev_data->dev_conf.rxmode.offloads; const uint32_t *type_table = adapter->ptype_tbl; const __m256i mbuf_init = _mm256_set_epi64x(0, 0, 0, rxq->mbuf_initializer); struct rte_mbuf **sw_ring = &rxq->sw_ring[rxq->rx_tail]; volatile union iavf_rx_flex_desc *rxdp = (union iavf_rx_flex_desc *)rxq->rx_ring + rxq->rx_tail; rte_prefetch0(rxdp); /* nb_pkts has to be floor-aligned to IAVF_DESCS_PER_LOOP_AVX */ nb_pkts = RTE_ALIGN_FLOOR(nb_pkts, IAVF_DESCS_PER_LOOP_AVX); /* See if we need to rearm the RX queue - gives the prefetch a bit * of time to act */ if (rxq->rxrearm_nb > IAVF_RXQ_REARM_THRESH) iavf_rxq_rearm(rxq); /* Before we start moving massive data around, check to see if * there is actually a packet available */ if (!(rxdp->wb.status_error0 & rte_cpu_to_le_32(1 << IAVF_RX_FLEX_DESC_STATUS0_DD_S))) return 0; /* constants used in processing loop */ const __m512i crc_adjust = _mm512_set_epi32 (/* 1st descriptor */ 0, /* ignore non-length fields */ -rxq->crc_len, /* sub crc on data_len */ -rxq->crc_len, /* sub crc on pkt_len */ 0, /* ignore pkt_type field */ /* 2nd descriptor */ 0, /* ignore non-length fields */ -rxq->crc_len, /* sub crc on data_len */ -rxq->crc_len, /* sub crc on pkt_len */ 0, /* ignore pkt_type field */ /* 3rd descriptor */ 0, /* ignore non-length fields */ -rxq->crc_len, /* sub crc on data_len */ -rxq->crc_len, /* sub crc on pkt_len */ 0, /* ignore pkt_type field */ /* 4th descriptor */ 0, /* ignore non-length fields */ -rxq->crc_len, /* sub crc on data_len */ -rxq->crc_len, /* sub crc on pkt_len */ 0 /* ignore pkt_type field */ ); /* 8 packets DD mask, LSB in each 32-bit value */ const __m256i dd_check = _mm256_set1_epi32(1); /* 8 packets EOP mask, second-LSB in each 32-bit value */ const __m256i eop_check = _mm256_slli_epi32(dd_check, IAVF_RX_FLEX_DESC_STATUS0_EOF_S); /* mask to shuffle from desc. to mbuf (4 descriptors)*/ const __m512i shuf_msk = _mm512_set_epi32 (/* 1st descriptor */ 0xFFFFFFFF, /* rss hash parsed separately */ 0x0B0A0504, /* octet 10~11, 16 bits vlan_macip */ /* octet 4~5, 16 bits data_len */ 0xFFFF0504, /* skip hi 16 bits pkt_len, zero out */ /* octet 4~5, 16 bits pkt_len */ 0xFFFFFFFF, /* pkt_type set as unknown */ /* 2nd descriptor */ 0xFFFFFFFF, /* rss hash parsed separately */ 0x0B0A0504, /* octet 10~11, 16 bits vlan_macip */ /* octet 4~5, 16 bits data_len */ 0xFFFF0504, /* skip hi 16 bits pkt_len, zero out */ /* octet 4~5, 16 bits pkt_len */ 0xFFFFFFFF, /* pkt_type set as unknown */ /* 3rd descriptor */ 0xFFFFFFFF, /* rss hash parsed separately */ 0x0B0A0504, /* octet 10~11, 16 bits vlan_macip */ /* octet 4~5, 16 bits data_len */ 0xFFFF0504, /* skip hi 16 bits pkt_len, zero out */ /* octet 4~5, 16 bits pkt_len */ 0xFFFFFFFF, /* pkt_type set as unknown */ /* 4th descriptor */ 0xFFFFFFFF, /* rss hash parsed separately */ 0x0B0A0504, /* octet 10~11, 16 bits vlan_macip */ /* octet 4~5, 16 bits data_len */ 0xFFFF0504, /* skip hi 16 bits pkt_len, zero out */ /* octet 4~5, 16 bits pkt_len */ 0xFFFFFFFF /* pkt_type set as unknown */ ); /** * compile-time check the above crc and shuffle layout is correct. * NOTE: the first field (lowest address) is given last in set_epi * calls above. */ RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, pkt_len) != offsetof(struct rte_mbuf, rx_descriptor_fields1) + 4); RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, data_len) != offsetof(struct rte_mbuf, rx_descriptor_fields1) + 8); RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, vlan_tci) != offsetof(struct rte_mbuf, rx_descriptor_fields1) + 10); RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, hash) != offsetof(struct rte_mbuf, rx_descriptor_fields1) + 12); /* Status/Error flag masks */ /** * mask everything except Checksum Reports, RSS indication * and VLAN indication. * bit6:4 for IP/L4 checksum errors. * bit12 is for RSS indication. * bit13 is for VLAN indication. */ const __m256i flags_mask = _mm256_set1_epi32((7 << 4) | (1 << 12) | (1 << 13)); /** * data to be shuffled by the result of the flags mask shifted by 4 * bits. This gives use the l3_l4 flags. */ const __m256i l3_l4_flags_shuf = _mm256_set_epi8(0, 0, 0, 0, 0, 0, 0, 0, /* shift right 1 bit to make sure it not exceed 255 */ (PKT_RX_EIP_CKSUM_BAD | PKT_RX_L4_CKSUM_BAD | PKT_RX_IP_CKSUM_BAD) >> 1, (PKT_RX_EIP_CKSUM_BAD | PKT_RX_L4_CKSUM_BAD | PKT_RX_IP_CKSUM_GOOD) >> 1, (PKT_RX_EIP_CKSUM_BAD | PKT_RX_L4_CKSUM_GOOD | PKT_RX_IP_CKSUM_BAD) >> 1, (PKT_RX_EIP_CKSUM_BAD | PKT_RX_L4_CKSUM_GOOD | PKT_RX_IP_CKSUM_GOOD) >> 1, (PKT_RX_L4_CKSUM_BAD | PKT_RX_IP_CKSUM_BAD) >> 1, (PKT_RX_L4_CKSUM_BAD | PKT_RX_IP_CKSUM_GOOD) >> 1, (PKT_RX_L4_CKSUM_GOOD | PKT_RX_IP_CKSUM_BAD) >> 1, (PKT_RX_L4_CKSUM_GOOD | PKT_RX_IP_CKSUM_GOOD) >> 1, /* second 128-bits */ 0, 0, 0, 0, 0, 0, 0, 0, (PKT_RX_EIP_CKSUM_BAD | PKT_RX_L4_CKSUM_BAD | PKT_RX_IP_CKSUM_BAD) >> 1, (PKT_RX_EIP_CKSUM_BAD | PKT_RX_L4_CKSUM_BAD | PKT_RX_IP_CKSUM_GOOD) >> 1, (PKT_RX_EIP_CKSUM_BAD | PKT_RX_L4_CKSUM_GOOD | PKT_RX_IP_CKSUM_BAD) >> 1, (PKT_RX_EIP_CKSUM_BAD | PKT_RX_L4_CKSUM_GOOD | PKT_RX_IP_CKSUM_GOOD) >> 1, (PKT_RX_L4_CKSUM_BAD | PKT_RX_IP_CKSUM_BAD) >> 1, (PKT_RX_L4_CKSUM_BAD | PKT_RX_IP_CKSUM_GOOD) >> 1, (PKT_RX_L4_CKSUM_GOOD | PKT_RX_IP_CKSUM_BAD) >> 1, (PKT_RX_L4_CKSUM_GOOD | PKT_RX_IP_CKSUM_GOOD) >> 1); const __m256i cksum_mask = _mm256_set1_epi32(PKT_RX_IP_CKSUM_GOOD | PKT_RX_IP_CKSUM_BAD | PKT_RX_L4_CKSUM_GOOD | PKT_RX_L4_CKSUM_BAD | PKT_RX_EIP_CKSUM_BAD); /** * data to be shuffled by result of flag mask, shifted down 12. * If RSS(bit12)/VLAN(bit13) are set, * shuffle moves appropriate flags in place. */ const __m256i rss_vlan_flags_shuf = _mm256_set_epi8(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, PKT_RX_RSS_HASH | PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED, PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED, PKT_RX_RSS_HASH, 0, /* end up 128-bits */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, PKT_RX_RSS_HASH | PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED, PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED, PKT_RX_RSS_HASH, 0); uint16_t i, received; for (i = 0, received = 0; i < nb_pkts; i += IAVF_DESCS_PER_LOOP_AVX, rxdp += IAVF_DESCS_PER_LOOP_AVX) { /* step 1, copy over 8 mbuf pointers to rx_pkts array */ _mm256_storeu_si256((void *)&rx_pkts[i], _mm256_loadu_si256((void *)&sw_ring[i])); #ifdef RTE_ARCH_X86_64 _mm256_storeu_si256 ((void *)&rx_pkts[i + 4], _mm256_loadu_si256((void *)&sw_ring[i + 4])); #endif __m512i raw_desc0_3, raw_desc4_7; const __m128i raw_desc7 = _mm_load_si128((void *)(rxdp + 7)); rte_compiler_barrier(); const __m128i raw_desc6 = _mm_load_si128((void *)(rxdp + 6)); rte_compiler_barrier(); const __m128i raw_desc5 = _mm_load_si128((void *)(rxdp + 5)); rte_compiler_barrier(); const __m128i raw_desc4 = _mm_load_si128((void *)(rxdp + 4)); rte_compiler_barrier(); const __m128i raw_desc3 = _mm_load_si128((void *)(rxdp + 3)); rte_compiler_barrier(); const __m128i raw_desc2 = _mm_load_si128((void *)(rxdp + 2)); rte_compiler_barrier(); const __m128i raw_desc1 = _mm_load_si128((void *)(rxdp + 1)); rte_compiler_barrier(); const __m128i raw_desc0 = _mm_load_si128((void *)(rxdp + 0)); raw_desc4_7 = _mm512_broadcast_i32x4(raw_desc4); raw_desc4_7 = _mm512_inserti32x4(raw_desc4_7, raw_desc5, 1); raw_desc4_7 = _mm512_inserti32x4(raw_desc4_7, raw_desc6, 2); raw_desc4_7 = _mm512_inserti32x4(raw_desc4_7, raw_desc7, 3); raw_desc0_3 = _mm512_broadcast_i32x4(raw_desc0); raw_desc0_3 = _mm512_inserti32x4(raw_desc0_3, raw_desc1, 1); raw_desc0_3 = _mm512_inserti32x4(raw_desc0_3, raw_desc2, 2); raw_desc0_3 = _mm512_inserti32x4(raw_desc0_3, raw_desc3, 3); if (split_packet) { int j; for (j = 0; j < IAVF_DESCS_PER_LOOP_AVX; j++) rte_mbuf_prefetch_part2(rx_pkts[i + j]); } /** * convert descriptors 4-7 into mbufs, re-arrange fields. * Then write into the mbuf. */ __m512i mb4_7 = _mm512_shuffle_epi8(raw_desc4_7, shuf_msk); mb4_7 = _mm512_add_epi32(mb4_7, crc_adjust); /** * to get packet types, ptype is located in bit16-25 * of each 128bits */ const __m512i ptype_mask = _mm512_set1_epi16(IAVF_RX_FLEX_DESC_PTYPE_M); const __m512i ptypes4_7 = _mm512_and_si512(raw_desc4_7, ptype_mask); const __m256i ptypes6_7 = _mm512_extracti64x4_epi64(ptypes4_7, 1); const __m256i ptypes4_5 = _mm512_extracti64x4_epi64(ptypes4_7, 0); const uint16_t ptype7 = _mm256_extract_epi16(ptypes6_7, 9); const uint16_t ptype6 = _mm256_extract_epi16(ptypes6_7, 1); const uint16_t ptype5 = _mm256_extract_epi16(ptypes4_5, 9); const uint16_t ptype4 = _mm256_extract_epi16(ptypes4_5, 1); const __m512i ptype4_7 = _mm512_set_epi32 (0, 0, 0, type_table[ptype7], 0, 0, 0, type_table[ptype6], 0, 0, 0, type_table[ptype5], 0, 0, 0, type_table[ptype4]); mb4_7 = _mm512_mask_blend_epi32(0x1111, mb4_7, ptype4_7); /** * convert descriptors 0-3 into mbufs, re-arrange fields. * Then write into the mbuf. */ __m512i mb0_3 = _mm512_shuffle_epi8(raw_desc0_3, shuf_msk); mb0_3 = _mm512_add_epi32(mb0_3, crc_adjust); /** * to get packet types, ptype is located in bit16-25 * of each 128bits */ const __m512i ptypes0_3 = _mm512_and_si512(raw_desc0_3, ptype_mask); const __m256i ptypes2_3 = _mm512_extracti64x4_epi64(ptypes0_3, 1); const __m256i ptypes0_1 = _mm512_extracti64x4_epi64(ptypes0_3, 0); const uint16_t ptype3 = _mm256_extract_epi16(ptypes2_3, 9); const uint16_t ptype2 = _mm256_extract_epi16(ptypes2_3, 1); const uint16_t ptype1 = _mm256_extract_epi16(ptypes0_1, 9); const uint16_t ptype0 = _mm256_extract_epi16(ptypes0_1, 1); const __m512i ptype0_3 = _mm512_set_epi32 (0, 0, 0, type_table[ptype3], 0, 0, 0, type_table[ptype2], 0, 0, 0, type_table[ptype1], 0, 0, 0, type_table[ptype0]); mb0_3 = _mm512_mask_blend_epi32(0x1111, mb0_3, ptype0_3); /** * use permute/extract to get status content * After the operations, the packets status flags are in the * order (hi->lo): [1, 3, 5, 7, 0, 2, 4, 6] */ /* merge the status bits into one register */ const __m512i status_permute_msk = _mm512_set_epi32 (0, 0, 0, 0, 0, 0, 0, 0, 22, 30, 6, 14, 18, 26, 2, 10); const __m512i raw_status0_7 = _mm512_permutex2var_epi32 (raw_desc4_7, status_permute_msk, raw_desc0_3); __m256i status0_7 = _mm512_extracti64x4_epi64 (raw_status0_7, 0); /* now do flag manipulation */ /* get only flag/error bits we want */ const __m256i flag_bits = _mm256_and_si256(status0_7, flags_mask); /** * 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, 4)); l3_l4_flags = _mm256_slli_epi32(l3_l4_flags, 1); l3_l4_flags = _mm256_and_si256(l3_l4_flags, cksum_mask); /* set rss and vlan flags */ const __m256i rss_vlan_flag_bits = _mm256_srli_epi32(flag_bits, 12); const __m256i rss_vlan_flags = _mm256_shuffle_epi8(rss_vlan_flags_shuf, rss_vlan_flag_bits); /* merge flags */ __m256i mbuf_flags = _mm256_or_si256(l3_l4_flags, rss_vlan_flags); if (rxq->fdir_enabled) { const __m512i fdir_permute_mask = _mm512_set_epi32 (0, 0, 0, 0, 0, 0, 0, 0, 7, 15, 23, 31, 3, 11, 19, 27); __m512i fdir_tmp = _mm512_permutex2var_epi32 (raw_desc0_3, fdir_permute_mask, raw_desc4_7); const __m256i fdir_id0_7 = _mm512_extracti64x4_epi64 (fdir_tmp, 0); const __m256i fdir_flags = flex_rxd_to_fdir_flags_vec_avx512(fdir_id0_7); /* merge with fdir_flags */ mbuf_flags = _mm256_or_si256(mbuf_flags, fdir_flags); /* write to mbuf: have to use scalar store here */ rx_pkts[i + 0]->hash.fdir.hi = _mm256_extract_epi32(fdir_id0_7, 3); rx_pkts[i + 1]->hash.fdir.hi = _mm256_extract_epi32(fdir_id0_7, 7); rx_pkts[i + 2]->hash.fdir.hi = _mm256_extract_epi32(fdir_id0_7, 2); rx_pkts[i + 3]->hash.fdir.hi = _mm256_extract_epi32(fdir_id0_7, 6); rx_pkts[i + 4]->hash.fdir.hi = _mm256_extract_epi32(fdir_id0_7, 1); rx_pkts[i + 5]->hash.fdir.hi = _mm256_extract_epi32(fdir_id0_7, 5); rx_pkts[i + 6]->hash.fdir.hi = _mm256_extract_epi32(fdir_id0_7, 0); rx_pkts[i + 7]->hash.fdir.hi = _mm256_extract_epi32(fdir_id0_7, 4); } /* if() on fdir_enabled */ __m256i mb4_5 = _mm512_extracti64x4_epi64(mb4_7, 0); __m256i mb6_7 = _mm512_extracti64x4_epi64(mb4_7, 1); __m256i mb0_1 = _mm512_extracti64x4_epi64(mb0_3, 0); __m256i mb2_3 = _mm512_extracti64x4_epi64(mb0_3, 1); #ifndef RTE_LIBRTE_IAVF_16BYTE_RX_DESC /** * needs to load 2nd 16B of each desc for RSS hash parsing, * will cause performance drop to get into this context. */ if (offloads & DEV_RX_OFFLOAD_RSS_HASH) { /* load bottom half of every 32B desc */ const __m128i raw_desc_bh7 = _mm_load_si128 ((void *)(&rxdp[7].wb.status_error1)); rte_compiler_barrier(); const __m128i raw_desc_bh6 = _mm_load_si128 ((void *)(&rxdp[6].wb.status_error1)); rte_compiler_barrier(); const __m128i raw_desc_bh5 = _mm_load_si128 ((void *)(&rxdp[5].wb.status_error1)); rte_compiler_barrier(); const __m128i raw_desc_bh4 = _mm_load_si128 ((void *)(&rxdp[4].wb.status_error1)); rte_compiler_barrier(); const __m128i raw_desc_bh3 = _mm_load_si128 ((void *)(&rxdp[3].wb.status_error1)); rte_compiler_barrier(); const __m128i raw_desc_bh2 = _mm_load_si128 ((void *)(&rxdp[2].wb.status_error1)); rte_compiler_barrier(); const __m128i raw_desc_bh1 = _mm_load_si128 ((void *)(&rxdp[1].wb.status_error1)); rte_compiler_barrier(); const __m128i raw_desc_bh0 = _mm_load_si128 ((void *)(&rxdp[0].wb.status_error1)); __m256i raw_desc_bh6_7 = _mm256_inserti128_si256 (_mm256_castsi128_si256(raw_desc_bh6), raw_desc_bh7, 1); __m256i raw_desc_bh4_5 = _mm256_inserti128_si256 (_mm256_castsi128_si256(raw_desc_bh4), raw_desc_bh5, 1); __m256i raw_desc_bh2_3 = _mm256_inserti128_si256 (_mm256_castsi128_si256(raw_desc_bh2), raw_desc_bh3, 1); __m256i raw_desc_bh0_1 = _mm256_inserti128_si256 (_mm256_castsi128_si256(raw_desc_bh0), raw_desc_bh1, 1); /** * to shift the 32b RSS hash value to the * highest 32b of each 128b before mask */ __m256i rss_hash6_7 = _mm256_slli_epi64(raw_desc_bh6_7, 32); __m256i rss_hash4_5 = _mm256_slli_epi64(raw_desc_bh4_5, 32); __m256i rss_hash2_3 = _mm256_slli_epi64(raw_desc_bh2_3, 32); __m256i rss_hash0_1 = _mm256_slli_epi64(raw_desc_bh0_1, 32); __m256i rss_hash_msk = _mm256_set_epi32(0xFFFFFFFF, 0, 0, 0, 0xFFFFFFFF, 0, 0, 0); rss_hash6_7 = _mm256_and_si256 (rss_hash6_7, rss_hash_msk); rss_hash4_5 = _mm256_and_si256 (rss_hash4_5, rss_hash_msk); rss_hash2_3 = _mm256_and_si256 (rss_hash2_3, rss_hash_msk); rss_hash0_1 = _mm256_and_si256 (rss_hash0_1, rss_hash_msk); mb6_7 = _mm256_or_si256(mb6_7, rss_hash6_7); mb4_5 = _mm256_or_si256(mb4_5, rss_hash4_5); mb2_3 = _mm256_or_si256(mb2_3, rss_hash2_3); mb0_1 = _mm256_or_si256(mb0_1, rss_hash0_1); } /* if() on RSS hash parsing */ #endif /** * 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 << IAVF_RX_FLEX_DESC_STATUS0_EOF_S); 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(/* zero hi 64b */ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, /* move values to lo 64b */ 8, 0, 10, 2, 12, 4, 14, 6); split_bits = _mm_shuffle_epi8(split_bits, eop_shuffle); *(uint64_t *)split_packet = _mm_cvtsi128_si64(split_bits); split_packet += IAVF_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 != IAVF_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 aligned */ rxq->rx_tail--; received--; } rxq->rxrearm_nb += received; return received; } /** * Notice: * - nb_pkts < IAVF_DESCS_PER_LOOP, just return no packet */ uint16_t iavf_recv_pkts_vec_avx512(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts) { return _iavf_recv_raw_pkts_vec_avx512(rx_queue, rx_pkts, nb_pkts, NULL); } /** * Notice: * - nb_pkts < IAVF_DESCS_PER_LOOP, just return no packet */ uint16_t iavf_recv_pkts_vec_avx512_flex_rxd(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts) { return _iavf_recv_raw_pkts_vec_avx512_flex_rxd(rx_queue, rx_pkts, nb_pkts, NULL); } /** * vPMD receive routine that reassembles single burst of 32 scattered packets * Notice: * - nb_pkts < IAVF_DESCS_PER_LOOP, just return no packet */ static uint16_t iavf_recv_scattered_burst_vec_avx512(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts) { struct iavf_rx_queue *rxq = rx_queue; uint8_t split_flags[IAVF_VPMD_RX_MAX_BURST] = {0}; /* get some new buffers */ uint16_t nb_bufs = _iavf_recv_raw_pkts_vec_avx512(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 && 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) { /* 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 < IAVF_DESCS_PER_LOOP, just return no packet */ uint16_t iavf_recv_scattered_pkts_vec_avx512(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts) { uint16_t retval = 0; while (nb_pkts > IAVF_VPMD_RX_MAX_BURST) { uint16_t burst = iavf_recv_scattered_burst_vec_avx512(rx_queue, rx_pkts + retval, IAVF_VPMD_RX_MAX_BURST); retval += burst; nb_pkts -= burst; if (burst < IAVF_VPMD_RX_MAX_BURST) return retval; } return retval + iavf_recv_scattered_burst_vec_avx512(rx_queue, rx_pkts + retval, nb_pkts); } /** * vPMD receive routine that reassembles single burst of * 32 scattered packets for flex RxD * Notice: * - nb_pkts < IAVF_DESCS_PER_LOOP, just return no packet */ static uint16_t iavf_recv_scattered_burst_vec_avx512_flex_rxd(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts) { struct iavf_rx_queue *rxq = rx_queue; uint8_t split_flags[IAVF_VPMD_RX_MAX_BURST] = {0}; /* get some new buffers */ uint16_t nb_bufs = _iavf_recv_raw_pkts_vec_avx512_flex_rxd(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 && 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) { /* 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 for flex RxD. * Main receive routine that can handle arbitrary burst sizes * Notice: * - nb_pkts < IAVF_DESCS_PER_LOOP, just return no packet */ uint16_t iavf_recv_scattered_pkts_vec_avx512_flex_rxd(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts) { uint16_t retval = 0; while (nb_pkts > IAVF_VPMD_RX_MAX_BURST) { uint16_t burst = iavf_recv_scattered_burst_vec_avx512_flex_rxd (rx_queue, rx_pkts + retval, IAVF_VPMD_RX_MAX_BURST); retval += burst; nb_pkts -= burst; if (burst < IAVF_VPMD_RX_MAX_BURST) return retval; } return retval + iavf_recv_scattered_burst_vec_avx512_flex_rxd(rx_queue, rx_pkts + retval, nb_pkts); } static __rte_always_inline int iavf_tx_free_bufs_avx512(struct iavf_tx_queue *txq) { struct iavf_tx_vec_entry *txep; uint32_t n; uint32_t i; int nb_free = 0; struct rte_mbuf *m, *free[IAVF_VPMD_TX_MAX_FREE_BUF]; /* check DD bits on threshold descriptor */ if ((txq->tx_ring[txq->next_dd].cmd_type_offset_bsz & rte_cpu_to_le_64(IAVF_TXD_QW1_DTYPE_MASK)) != rte_cpu_to_le_64(IAVF_TX_DESC_DTYPE_DESC_DONE)) return 0; n = txq->rs_thresh; /* first buffer to free from S/W ring is at index * tx_next_dd - (tx_rs_thresh-1) */ txep = (void *)txq->sw_ring; txep += txq->next_dd - (n - 1); if (txq->offloads & DEV_TX_OFFLOAD_MBUF_FAST_FREE && (n & 31) == 0) { struct rte_mempool *mp = txep[0].mbuf->pool; struct rte_mempool_cache *cache = rte_mempool_default_cache(mp, rte_lcore_id()); void **cache_objs; if (!cache || cache->len == 0) goto normal; cache_objs = &cache->objs[cache->len]; if (n > RTE_MEMPOOL_CACHE_MAX_SIZE) { rte_mempool_ops_enqueue_bulk(mp, (void *)txep, n); goto done; } /* The cache follows the following algorithm * 1. Add the objects to the cache * 2. Anything greater than the cache min value (if it crosses the * cache flush threshold) is flushed to the ring. */ /* Add elements back into the cache */ uint32_t copied = 0; /* n is multiple of 32 */ while (copied < n) { const __m512i a = _mm512_loadu_si512(&txep[copied]); const __m512i b = _mm512_loadu_si512(&txep[copied + 8]); const __m512i c = _mm512_loadu_si512(&txep[copied + 16]); const __m512i d = _mm512_loadu_si512(&txep[copied + 24]); _mm512_storeu_si512(&cache_objs[copied], a); _mm512_storeu_si512(&cache_objs[copied + 8], b); _mm512_storeu_si512(&cache_objs[copied + 16], c); _mm512_storeu_si512(&cache_objs[copied + 24], d); copied += 32; } cache->len += n; if (cache->len >= cache->flushthresh) { rte_mempool_ops_enqueue_bulk(mp, &cache->objs[cache->size], cache->len - cache->size); cache->len = cache->size; } goto done; } normal: m = rte_pktmbuf_prefree_seg(txep[0].mbuf); if (likely(m)) { free[0] = m; nb_free = 1; for (i = 1; i < n; i++) { m = rte_pktmbuf_prefree_seg(txep[i].mbuf); if (likely(m)) { if (likely(m->pool == free[0]->pool)) { free[nb_free++] = m; } else { rte_mempool_put_bulk(free[0]->pool, (void *)free, nb_free); free[0] = m; nb_free = 1; } } } rte_mempool_put_bulk(free[0]->pool, (void **)free, nb_free); } else { for (i = 1; i < n; i++) { m = rte_pktmbuf_prefree_seg(txep[i].mbuf); if (m) rte_mempool_put(m->pool, m); } } done: /* buffers were freed, update counters */ txq->nb_free = (uint16_t)(txq->nb_free + txq->rs_thresh); txq->next_dd = (uint16_t)(txq->next_dd + txq->rs_thresh); if (txq->next_dd >= txq->nb_tx_desc) txq->next_dd = (uint16_t)(txq->rs_thresh - 1); return txq->rs_thresh; } static __rte_always_inline void tx_backlog_entry_avx512(struct iavf_tx_vec_entry *txep, struct rte_mbuf **tx_pkts, uint16_t nb_pkts) { int i; for (i = 0; i < (int)nb_pkts; ++i) txep[i].mbuf = tx_pkts[i]; } static inline void iavf_vtx1(volatile struct iavf_tx_desc *txdp, struct rte_mbuf *pkt, uint64_t flags) { uint64_t high_qw = (IAVF_TX_DESC_DTYPE_DATA | ((uint64_t)flags << IAVF_TXD_QW1_CMD_SHIFT) | ((uint64_t)pkt->data_len << IAVF_TXD_QW1_TX_BUF_SZ_SHIFT)); __m128i descriptor = _mm_set_epi64x(high_qw, pkt->buf_iova + pkt->data_off); _mm_storeu_si128((__m128i *)txdp, descriptor); } #define IAVF_TX_LEN_MASK 0xAA #define IAVF_TX_OFF_MASK 0x55 static inline void iavf_vtx(volatile struct iavf_tx_desc *txdp, struct rte_mbuf **pkt, uint16_t nb_pkts, uint64_t flags) { const uint64_t hi_qw_tmpl = (IAVF_TX_DESC_DTYPE_DATA | ((uint64_t)flags << IAVF_TXD_QW1_CMD_SHIFT)); /* if unaligned on 32-bit boundary, do one to align */ if (((uintptr_t)txdp & 0x1F) != 0 && nb_pkts != 0) { iavf_vtx1(txdp, *pkt, flags); nb_pkts--, txdp++, pkt++; } /* do 4 at a time while possible, in bursts */ for (; nb_pkts > 3; txdp += 4, pkt += 4, nb_pkts -= 4) { __m512i desc4 = _mm512_set_epi64 ((uint64_t)pkt[3]->data_len, pkt[3]->buf_iova, (uint64_t)pkt[2]->data_len, pkt[2]->buf_iova, (uint64_t)pkt[1]->data_len, pkt[1]->buf_iova, (uint64_t)pkt[0]->data_len, pkt[0]->buf_iova); __m512i hi_qw_tmpl_4 = _mm512_set1_epi64(hi_qw_tmpl); __m512i data_off_4 = _mm512_set_epi64 (0, pkt[3]->data_off, 0, pkt[2]->data_off, 0, pkt[1]->data_off, 0, pkt[0]->data_off); desc4 = _mm512_mask_slli_epi64(desc4, IAVF_TX_LEN_MASK, desc4, IAVF_TXD_QW1_TX_BUF_SZ_SHIFT); desc4 = _mm512_mask_or_epi64(desc4, IAVF_TX_LEN_MASK, desc4, hi_qw_tmpl_4); desc4 = _mm512_mask_add_epi64(desc4, IAVF_TX_OFF_MASK, desc4, data_off_4); _mm512_storeu_si512((void *)txdp, desc4); } /* do any last ones */ while (nb_pkts) { iavf_vtx1(txdp, *pkt, flags); txdp++, pkt++, nb_pkts--; } } static inline uint16_t iavf_xmit_fixed_burst_vec_avx512(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts) { struct iavf_tx_queue *txq = (struct iavf_tx_queue *)tx_queue; volatile struct iavf_tx_desc *txdp; struct iavf_tx_vec_entry *txep; uint16_t n, nb_commit, tx_id; /* bit2 is reserved and must be set to 1 according to Spec */ uint64_t flags = IAVF_TX_DESC_CMD_EOP | IAVF_TX_DESC_CMD_ICRC; uint64_t rs = IAVF_TX_DESC_CMD_RS | flags; /* cross rx_thresh boundary is not allowed */ nb_pkts = RTE_MIN(nb_pkts, txq->rs_thresh); if (txq->nb_free < txq->free_thresh) iavf_tx_free_bufs_avx512(txq); nb_commit = nb_pkts = (uint16_t)RTE_MIN(txq->nb_free, nb_pkts); if (unlikely(nb_pkts == 0)) return 0; tx_id = txq->tx_tail; txdp = &txq->tx_ring[tx_id]; txep = (void *)txq->sw_ring; txep += tx_id; txq->nb_free = (uint16_t)(txq->nb_free - nb_pkts); n = (uint16_t)(txq->nb_tx_desc - tx_id); if (nb_commit >= n) { tx_backlog_entry_avx512(txep, tx_pkts, n); iavf_vtx(txdp, tx_pkts, n - 1, flags); tx_pkts += (n - 1); txdp += (n - 1); iavf_vtx1(txdp, *tx_pkts++, rs); nb_commit = (uint16_t)(nb_commit - n); tx_id = 0; txq->next_rs = (uint16_t)(txq->rs_thresh - 1); /* avoid reach the end of ring */ txdp = &txq->tx_ring[tx_id]; txep = (void *)txq->sw_ring; txep += tx_id; } tx_backlog_entry_avx512(txep, tx_pkts, nb_commit); iavf_vtx(txdp, tx_pkts, nb_commit, flags); tx_id = (uint16_t)(tx_id + nb_commit); if (tx_id > txq->next_rs) { txq->tx_ring[txq->next_rs].cmd_type_offset_bsz |= rte_cpu_to_le_64(((uint64_t)IAVF_TX_DESC_CMD_RS) << IAVF_TXD_QW1_CMD_SHIFT); txq->next_rs = (uint16_t)(txq->next_rs + txq->rs_thresh); } txq->tx_tail = tx_id; IAVF_PCI_REG_WRITE(txq->qtx_tail, txq->tx_tail); return nb_pkts; } uint16_t iavf_xmit_pkts_vec_avx512(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts) { uint16_t nb_tx = 0; struct iavf_tx_queue *txq = (struct iavf_tx_queue *)tx_queue; while (nb_pkts) { uint16_t ret, num; num = (uint16_t)RTE_MIN(nb_pkts, txq->rs_thresh); ret = iavf_xmit_fixed_burst_vec_avx512(tx_queue, &tx_pkts[nb_tx], num); nb_tx += ret; nb_pkts -= ret; if (ret < num) break; } return nb_tx; } void __rte_cold iavf_tx_queue_release_mbufs_avx512(struct iavf_tx_queue *txq) { unsigned int i; const uint16_t max_desc = (uint16_t)(txq->nb_tx_desc - 1); struct iavf_tx_vec_entry *swr = (void *)txq->sw_ring; if (!txq->sw_ring || txq->nb_free == max_desc) return; i = txq->next_dd - txq->rs_thresh + 1; if (txq->tx_tail < i) { for (; i < txq->nb_tx_desc; i++) { rte_pktmbuf_free_seg(swr[i].mbuf); swr[i].mbuf = NULL; } i = 0; } } int __rte_cold iavf_txq_vec_setup_avx512(struct iavf_tx_queue *txq) { txq->rel_mbufs_type = IAVF_REL_MBUFS_AVX512_VEC; return 0; }