diff options
Diffstat (limited to 'drivers/net/i40e/i40e_rxtx_vec.c')
| -rw-r--r-- | drivers/net/i40e/i40e_rxtx_vec.c | 777 |
1 files changed, 777 insertions, 0 deletions
diff --git a/drivers/net/i40e/i40e_rxtx_vec.c b/drivers/net/i40e/i40e_rxtx_vec.c new file mode 100644 index 00000000..047aff53 --- /dev/null +++ b/drivers/net/i40e/i40e_rxtx_vec.c @@ -0,0 +1,777 @@ +/*- + * BSD LICENSE + * + * Copyright(c) 2010-2015 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <stdint.h> +#include <rte_ethdev.h> +#include <rte_malloc.h> + +#include "base/i40e_prototype.h" +#include "base/i40e_type.h" +#include "i40e_ethdev.h" +#include "i40e_rxtx.h" + +#include <tmmintrin.h> + +#ifndef __INTEL_COMPILER +#pragma GCC diagnostic ignored "-Wcast-qual" +#endif + +static inline void +i40e_rxq_rearm(struct i40e_rx_queue *rxq) +{ + int i; + uint16_t rx_id; + volatile union i40e_rx_desc *rxdp; + struct i40e_rx_entry *rxep = &rxq->sw_ring[rxq->rxrearm_start]; + struct rte_mbuf *mb0, *mb1; + __m128i hdr_room = _mm_set_epi64x(RTE_PKTMBUF_HEADROOM, + RTE_PKTMBUF_HEADROOM); + __m128i dma_addr0, dma_addr1; + + rxdp = rxq->rx_ring + rxq->rxrearm_start; + + /* Pull 'n' more MBUFs into the software ring */ + if (rte_mempool_get_bulk(rxq->mp, + (void *)rxep, + RTE_I40E_RXQ_REARM_THRESH) < 0) { + if (rxq->rxrearm_nb + RTE_I40E_RXQ_REARM_THRESH >= + rxq->nb_rx_desc) { + dma_addr0 = _mm_setzero_si128(); + for (i = 0; i < RTE_I40E_DESCS_PER_LOOP; i++) { + rxep[i].mbuf = &rxq->fake_mbuf; + _mm_store_si128((__m128i *)&rxdp[i].read, + dma_addr0); + } + } + rte_eth_devices[rxq->port_id].data->rx_mbuf_alloc_failed += + RTE_I40E_RXQ_REARM_THRESH; + return; + } + + /* Initialize the mbufs in vector, process 2 mbufs in one loop */ + for (i = 0; i < RTE_I40E_RXQ_REARM_THRESH; i += 2, rxep += 2) { + __m128i vaddr0, vaddr1; + uintptr_t p0, p1; + + mb0 = rxep[0].mbuf; + mb1 = rxep[1].mbuf; + + /* Flush mbuf with pkt template. + * Data to be rearmed is 6 bytes long. + * Though, RX will overwrite ol_flags that are coming next + * anyway. So overwrite whole 8 bytes with one load: + * 6 bytes of rearm_data plus first 2 bytes of ol_flags. + */ + p0 = (uintptr_t)&mb0->rearm_data; + *(uint64_t *)p0 = rxq->mbuf_initializer; + p1 = (uintptr_t)&mb1->rearm_data; + *(uint64_t *)p1 = rxq->mbuf_initializer; + + /* load buf_addr(lo 64bit) and buf_physaddr(hi 64bit) */ + vaddr0 = _mm_loadu_si128((__m128i *)&mb0->buf_addr); + vaddr1 = _mm_loadu_si128((__m128i *)&mb1->buf_addr); + + /* convert pa to dma_addr hdr/data */ + dma_addr0 = _mm_unpackhi_epi64(vaddr0, vaddr0); + dma_addr1 = _mm_unpackhi_epi64(vaddr1, vaddr1); + + /* add headroom to pa values */ + dma_addr0 = _mm_add_epi64(dma_addr0, hdr_room); + dma_addr1 = _mm_add_epi64(dma_addr1, hdr_room); + + /* flush desc with pa dma_addr */ + _mm_store_si128((__m128i *)&rxdp++->read, dma_addr0); + _mm_store_si128((__m128i *)&rxdp++->read, dma_addr1); + } + + rxq->rxrearm_start += RTE_I40E_RXQ_REARM_THRESH; + if (rxq->rxrearm_start >= rxq->nb_rx_desc) + rxq->rxrearm_start = 0; + + rxq->rxrearm_nb -= RTE_I40E_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 */ + I40E_PCI_REG_WRITE(rxq->qrx_tail, rx_id); +} + +/* Handling the offload flags (olflags) field takes computation + * time when receiving packets. Therefore we provide a flag to disable + * the processing of the olflags field when they are not needed. This + * gives improved performance, at the cost of losing the offload info + * in the received packet + */ +#ifdef RTE_LIBRTE_I40E_RX_OLFLAGS_ENABLE + +static inline void +desc_to_olflags_v(__m128i descs[4], struct rte_mbuf **rx_pkts) +{ + __m128i vlan0, vlan1, rss; + union { + uint16_t e[4]; + uint64_t dword; + } vol; + + /* mask everything except rss and vlan flags + *bit2 is for vlan tag, bits 13:12 for rss + */ + const __m128i rss_vlan_msk = _mm_set_epi16( + 0x0000, 0x0000, 0x0000, 0x0000, + 0x3004, 0x3004, 0x3004, 0x3004); + + /* map rss and vlan type to rss hash and vlan flag */ + const __m128i vlan_flags = _mm_set_epi8(0, 0, 0, 0, + 0, 0, 0, 0, + 0, 0, 0, PKT_RX_VLAN_PKT, + 0, 0, 0, 0); + + const __m128i rss_flags = _mm_set_epi8(0, 0, 0, 0, + 0, 0, 0, 0, + 0, 0, 0, 0, + PKT_RX_FDIR, 0, PKT_RX_RSS_HASH, 0); + + vlan0 = _mm_unpackhi_epi16(descs[0], descs[1]); + vlan1 = _mm_unpackhi_epi16(descs[2], descs[3]); + vlan0 = _mm_unpacklo_epi32(vlan0, vlan1); + + vlan1 = _mm_and_si128(vlan0, rss_vlan_msk); + vlan0 = _mm_shuffle_epi8(vlan_flags, vlan1); + + rss = _mm_srli_epi16(vlan1, 12); + rss = _mm_shuffle_epi8(rss_flags, rss); + + vlan0 = _mm_or_si128(vlan0, rss); + vol.dword = _mm_cvtsi128_si64(vlan0); + + rx_pkts[0]->ol_flags = vol.e[0]; + rx_pkts[1]->ol_flags = vol.e[1]; + rx_pkts[2]->ol_flags = vol.e[2]; + rx_pkts[3]->ol_flags = vol.e[3]; +} +#else +#define desc_to_olflags_v(desc, rx_pkts) do {} while (0) +#endif + +#define PKTLEN_SHIFT (6) +#define PKTLEN_MASK (0x3FFF) +/* Handling the pkt len field is not aligned with 1byte, so shift is + * needed to let it align + */ +static inline void +desc_pktlen_align(__m128i descs[4]) +{ + __m128i pktlen0, pktlen1, zero; + union { + uint16_t e[4]; + uint64_t dword; + } vol; + + /* mask everything except pktlen field*/ + const __m128i pktlen_msk = _mm_set_epi32(PKTLEN_MASK, PKTLEN_MASK, + PKTLEN_MASK, PKTLEN_MASK); + + pktlen0 = _mm_unpackhi_epi32(descs[0], descs[2]); + pktlen1 = _mm_unpackhi_epi32(descs[1], descs[3]); + pktlen0 = _mm_unpackhi_epi32(pktlen0, pktlen1); + + zero = _mm_xor_si128(pktlen0, pktlen0); + + pktlen0 = _mm_srli_epi32(pktlen0, PKTLEN_SHIFT); + pktlen0 = _mm_and_si128(pktlen0, pktlen_msk); + + pktlen0 = _mm_packs_epi32(pktlen0, zero); + vol.dword = _mm_cvtsi128_si64(pktlen0); + /* let the descriptor byte 15-14 store the pkt len */ + *((uint16_t *)&descs[0]+7) = vol.e[0]; + *((uint16_t *)&descs[1]+7) = vol.e[1]; + *((uint16_t *)&descs[2]+7) = vol.e[2]; + *((uint16_t *)&descs[3]+7) = vol.e[3]; +} + + /* + * Notice: + * - nb_pkts < RTE_I40E_DESCS_PER_LOOP, just return no packet + * - nb_pkts > RTE_I40E_VPMD_RX_BURST, only scan RTE_I40E_VPMD_RX_BURST + * numbers of DD bits + */ +static inline uint16_t +_recv_raw_pkts_vec(struct i40e_rx_queue *rxq, struct rte_mbuf **rx_pkts, + uint16_t nb_pkts, uint8_t *split_packet) +{ + volatile union i40e_rx_desc *rxdp; + struct i40e_rx_entry *sw_ring; + uint16_t nb_pkts_recd; + int pos; + uint64_t var; + __m128i shuf_msk; + + __m128i crc_adjust = _mm_set_epi16( + 0, 0, 0, /* ignore non-length fields */ + -rxq->crc_len, /* sub crc on data_len */ + 0, /* ignore high-16bits of pkt_len */ + -rxq->crc_len, /* sub crc on pkt_len */ + 0, 0 /* ignore pkt_type field */ + ); + __m128i dd_check, eop_check; + + /* nb_pkts shall be less equal than RTE_I40E_MAX_RX_BURST */ + nb_pkts = RTE_MIN(nb_pkts, RTE_I40E_MAX_RX_BURST); + + /* nb_pkts has to be floor-aligned to RTE_I40E_DESCS_PER_LOOP */ + nb_pkts = RTE_ALIGN_FLOOR(nb_pkts, RTE_I40E_DESCS_PER_LOOP); + + /* Just the act of getting into the function from the application is + * going to cost about 7 cycles + */ + rxdp = rxq->rx_ring + rxq->rx_tail; + + _mm_prefetch((const void *)rxdp, _MM_HINT_T0); + + /* See if we need to rearm the RX queue - gives the prefetch a bit + * of time to act + */ + if (rxq->rxrearm_nb > RTE_I40E_RXQ_REARM_THRESH) + i40e_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 << I40E_RX_DESC_STATUS_DD_SHIFT))) + return 0; + + /* 4 packets DD mask */ + dd_check = _mm_set_epi64x(0x0000000100000001LL, 0x0000000100000001LL); + + /* 4 packets EOP mask */ + eop_check = _mm_set_epi64x(0x0000000200000002LL, 0x0000000200000002LL); + + /* mask to shuffle from desc. to mbuf */ + shuf_msk = _mm_set_epi8( + 7, 6, 5, 4, /* octet 4~7, 32bits rss */ + 3, 2, /* octet 2~3, low 16 bits vlan_macip */ + 15, 14, /* octet 15~14, 16 bits data_len */ + 0xFF, 0xFF, /* skip high 16 bits pkt_len, zero out */ + 15, 14, /* octet 15~14, low 16 bits pkt_len */ + 0xFF, 0xFF, /* pkt_type set as unknown */ + 0xFF, 0xFF /*pkt_type set as unknown */ + ); + + /* Cache is empty -> need to scan the buffer rings, but first move + * the next 'n' mbufs into the cache + */ + sw_ring = &rxq->sw_ring[rxq->rx_tail]; + + /* A. load 4 packet in one loop + * [A*. mask out 4 unused dirty field in desc] + * B. copy 4 mbuf point from swring to rx_pkts + * C. calc the number of DD bits among the 4 packets + * [C*. extract the end-of-packet bit, if requested] + * D. fill info. from desc to mbuf + */ + + for (pos = 0, nb_pkts_recd = 0; pos < RTE_I40E_VPMD_RX_BURST; + pos += RTE_I40E_DESCS_PER_LOOP, + rxdp += RTE_I40E_DESCS_PER_LOOP) { + __m128i descs[RTE_I40E_DESCS_PER_LOOP]; + __m128i pkt_mb1, pkt_mb2, pkt_mb3, pkt_mb4; + __m128i zero, staterr, sterr_tmp1, sterr_tmp2; + __m128i mbp1, mbp2; /* two mbuf pointer in one XMM reg. */ + + /* B.1 load 1 mbuf point */ + mbp1 = _mm_loadu_si128((__m128i *)&sw_ring[pos]); + /* Read desc statuses backwards to avoid race condition */ + /* A.1 load 4 pkts desc */ + descs[3] = _mm_loadu_si128((__m128i *)(rxdp + 3)); + + /* B.2 copy 2 mbuf point into rx_pkts */ + _mm_storeu_si128((__m128i *)&rx_pkts[pos], mbp1); + + /* B.1 load 1 mbuf point */ + mbp2 = _mm_loadu_si128((__m128i *)&sw_ring[pos+2]); + + descs[2] = _mm_loadu_si128((__m128i *)(rxdp + 2)); + /* B.1 load 2 mbuf point */ + descs[1] = _mm_loadu_si128((__m128i *)(rxdp + 1)); + descs[0] = _mm_loadu_si128((__m128i *)(rxdp)); + + /* B.2 copy 2 mbuf point into rx_pkts */ + _mm_storeu_si128((__m128i *)&rx_pkts[pos+2], mbp2); + + if (split_packet) { + rte_prefetch0(&rx_pkts[pos]->cacheline1); + rte_prefetch0(&rx_pkts[pos + 1]->cacheline1); + rte_prefetch0(&rx_pkts[pos + 2]->cacheline1); + rte_prefetch0(&rx_pkts[pos + 3]->cacheline1); + } + + /*shift the pktlen field*/ + desc_pktlen_align(descs); + + /* avoid compiler reorder optimization */ + rte_compiler_barrier(); + + /* D.1 pkt 3,4 convert format from desc to pktmbuf */ + pkt_mb4 = _mm_shuffle_epi8(descs[3], shuf_msk); + pkt_mb3 = _mm_shuffle_epi8(descs[2], shuf_msk); + + /* C.1 4=>2 filter staterr info only */ + sterr_tmp2 = _mm_unpackhi_epi32(descs[3], descs[2]); + /* C.1 4=>2 filter staterr info only */ + sterr_tmp1 = _mm_unpackhi_epi32(descs[1], descs[0]); + + desc_to_olflags_v(descs, &rx_pkts[pos]); + + /* D.2 pkt 3,4 set in_port/nb_seg and remove crc */ + pkt_mb4 = _mm_add_epi16(pkt_mb4, crc_adjust); + pkt_mb3 = _mm_add_epi16(pkt_mb3, crc_adjust); + + /* D.1 pkt 1,2 convert format from desc to pktmbuf */ + pkt_mb2 = _mm_shuffle_epi8(descs[1], shuf_msk); + pkt_mb1 = _mm_shuffle_epi8(descs[0], shuf_msk); + + /* C.2 get 4 pkts staterr value */ + zero = _mm_xor_si128(dd_check, dd_check); + staterr = _mm_unpacklo_epi32(sterr_tmp1, sterr_tmp2); + + /* D.3 copy final 3,4 data to rx_pkts */ + _mm_storeu_si128((void *)&rx_pkts[pos+3]->rx_descriptor_fields1, + pkt_mb4); + _mm_storeu_si128((void *)&rx_pkts[pos+2]->rx_descriptor_fields1, + pkt_mb3); + + /* D.2 pkt 1,2 set in_port/nb_seg and remove crc */ + pkt_mb2 = _mm_add_epi16(pkt_mb2, crc_adjust); + pkt_mb1 = _mm_add_epi16(pkt_mb1, crc_adjust); + + /* C* extract and record EOP bit */ + if (split_packet) { + __m128i eop_shuf_mask = _mm_set_epi8( + 0xFF, 0xFF, 0xFF, 0xFF, + 0xFF, 0xFF, 0xFF, 0xFF, + 0xFF, 0xFF, 0xFF, 0xFF, + 0x04, 0x0C, 0x00, 0x08 + ); + + /* and with mask to extract bits, flipping 1-0 */ + __m128i eop_bits = _mm_andnot_si128(staterr, eop_check); + /* the staterr values are not in order, as the count + * count of dd bits doesn't care. However, for end of + * packet tracking, we do care, so shuffle. This also + * compresses the 32-bit values to 8-bit + */ + eop_bits = _mm_shuffle_epi8(eop_bits, eop_shuf_mask); + /* store the resulting 32-bit value */ + *(int *)split_packet = _mm_cvtsi128_si32(eop_bits); + split_packet += RTE_I40E_DESCS_PER_LOOP; + + /* zero-out next pointers */ + rx_pkts[pos]->next = NULL; + rx_pkts[pos + 1]->next = NULL; + rx_pkts[pos + 2]->next = NULL; + rx_pkts[pos + 3]->next = NULL; + } + + /* C.3 calc available number of desc */ + staterr = _mm_and_si128(staterr, dd_check); + staterr = _mm_packs_epi32(staterr, zero); + + /* D.3 copy final 1,2 data to rx_pkts */ + _mm_storeu_si128((void *)&rx_pkts[pos+1]->rx_descriptor_fields1, + pkt_mb2); + _mm_storeu_si128((void *)&rx_pkts[pos]->rx_descriptor_fields1, + pkt_mb1); + /* C.4 calc avaialbe number of desc */ + var = __builtin_popcountll(_mm_cvtsi128_si64(staterr)); + nb_pkts_recd += var; + if (likely(var != RTE_I40E_DESCS_PER_LOOP)) + break; + } + + /* Update our internal tail pointer */ + rxq->rx_tail = (uint16_t)(rxq->rx_tail + nb_pkts_recd); + rxq->rx_tail = (uint16_t)(rxq->rx_tail & (rxq->nb_rx_desc - 1)); + rxq->rxrearm_nb = (uint16_t)(rxq->rxrearm_nb + nb_pkts_recd); + + return nb_pkts_recd; +} + + /* + * Notice: + * - nb_pkts < RTE_I40E_DESCS_PER_LOOP, just return no packet + * - nb_pkts > RTE_I40E_VPMD_RX_BURST, only scan RTE_I40E_VPMD_RX_BURST + * numbers of DD bits + */ +uint16_t +i40e_recv_pkts_vec(void *rx_queue, struct rte_mbuf **rx_pkts, + uint16_t nb_pkts) +{ + return _recv_raw_pkts_vec(rx_queue, rx_pkts, nb_pkts, NULL); +} + +static inline uint16_t +reassemble_packets(struct i40e_rx_queue *rxq, struct rte_mbuf **rx_bufs, + uint16_t nb_bufs, uint8_t *split_flags) +{ + struct rte_mbuf *pkts[RTE_I40E_VPMD_RX_BURST]; /*finished pkts*/ + struct rte_mbuf *start = rxq->pkt_first_seg; + struct rte_mbuf *end = rxq->pkt_last_seg; + unsigned pkt_idx, buf_idx; + + for (buf_idx = 0, pkt_idx = 0; buf_idx < nb_bufs; buf_idx++) { + if (end != NULL) { + /* processing a split packet */ + end->next = rx_bufs[buf_idx]; + rx_bufs[buf_idx]->data_len += rxq->crc_len; + + start->nb_segs++; + start->pkt_len += rx_bufs[buf_idx]->data_len; + end = end->next; + + if (!split_flags[buf_idx]) { + /* it's the last packet of the set */ + start->hash = end->hash; + start->ol_flags = end->ol_flags; + /* we need to strip crc for the whole packet */ + start->pkt_len -= rxq->crc_len; + if (end->data_len > rxq->crc_len) { + end->data_len -= rxq->crc_len; + } else { + /* free up last mbuf */ + struct rte_mbuf *secondlast = start; + + while (secondlast->next != end) + secondlast = secondlast->next; + secondlast->data_len -= (rxq->crc_len - + end->data_len); + secondlast->next = NULL; + rte_pktmbuf_free_seg(end); + end = secondlast; + } + pkts[pkt_idx++] = start; + start = end = NULL; + } + } else { + /* not processing a split packet */ + if (!split_flags[buf_idx]) { + /* not a split packet, save and skip */ + pkts[pkt_idx++] = rx_bufs[buf_idx]; + continue; + } + end = start = rx_bufs[buf_idx]; + rx_bufs[buf_idx]->data_len += rxq->crc_len; + rx_bufs[buf_idx]->pkt_len += rxq->crc_len; + } + } + + /* save the partial packet for next time */ + rxq->pkt_first_seg = start; + rxq->pkt_last_seg = end; + memcpy(rx_bufs, pkts, pkt_idx * (sizeof(*pkts))); + return pkt_idx; +} + + /* vPMD receive routine that reassembles scattered packets + * Notice: + * - nb_pkts < RTE_I40E_DESCS_PER_LOOP, just return no packet + * - nb_pkts > RTE_I40E_VPMD_RX_BURST, only scan RTE_I40E_VPMD_RX_BURST + * numbers of DD bits + */ +uint16_t +i40e_recv_scattered_pkts_vec(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(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 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; + } + return i + reassemble_packets(rxq, &rx_pkts[i], nb_bufs - i, + &split_flags[i]); +} + +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_physaddr + 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) +{ + int i; + + for (i = 0; i < nb_pkts; ++i, ++txdp, ++pkt) + vtx1(txdp, *pkt, flags); +} + +static inline int __attribute__((always_inline)) +i40e_tx_free_bufs(struct i40e_tx_queue *txq) +{ + struct i40e_tx_entry *txep; + uint32_t n; + uint32_t i; + int nb_free = 0; + struct rte_mbuf *m, *free[RTE_I40E_TX_MAX_FREE_BUF_SZ]; + + /* check DD bits on threshold descriptor */ + if ((txq->tx_ring[txq->tx_next_dd].cmd_type_offset_bsz & + rte_cpu_to_le_64(I40E_TXD_QW1_DTYPE_MASK)) != + rte_cpu_to_le_64(I40E_TX_DESC_DTYPE_DESC_DONE)) + return 0; + + n = txq->tx_rs_thresh; + + /* first buffer to free from S/W ring is at index + * tx_next_dd - (tx_rs_thresh-1) + */ + txep = &txq->sw_ring[txq->tx_next_dd - (n - 1)]; + m = __rte_pktmbuf_prefree_seg(txep[0].mbuf); + if (likely(m != NULL)) { + free[0] = m; + nb_free = 1; + for (i = 1; i < n; i++) { + m = __rte_pktmbuf_prefree_seg(txep[i].mbuf); + if (likely(m != NULL)) { + 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 != NULL) + rte_mempool_put(m->pool, m); + } + } + + /* buffers were freed, update counters */ + txq->nb_tx_free = (uint16_t)(txq->nb_tx_free + txq->tx_rs_thresh); + txq->tx_next_dd = (uint16_t)(txq->tx_next_dd + txq->tx_rs_thresh); + if (txq->tx_next_dd >= txq->nb_tx_desc) + txq->tx_next_dd = (uint16_t)(txq->tx_rs_thresh - 1); + + return txq->tx_rs_thresh; +} + +static inline void __attribute__((always_inline)) +tx_backlog_entry(struct i40e_tx_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]; +} + +uint16_t +i40e_xmit_pkts_vec(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; + int i; + + /* cross rx_thresh boundary is not allowed */ + nb_pkts = RTE_MIN(nb_pkts, txq->tx_rs_thresh); + + 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); + + for (i = 0; i < n - 1; ++i, ++tx_pkts, ++txdp) + vtx1(txdp, *tx_pkts, flags); + + 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_WRITE(txq->qtx_tail, txq->tx_tail); + + return nb_pkts; +} + +void __attribute__((cold)) +i40e_rx_queue_release_mbufs_vec(struct i40e_rx_queue *rxq) +{ + const unsigned mask = rxq->nb_rx_desc - 1; + unsigned i; + + if (rxq->sw_ring == NULL || rxq->rxrearm_nb >= rxq->nb_rx_desc) + return; + + /* free all mbufs that are valid in the ring */ + for (i = rxq->rx_tail; i != rxq->rxrearm_start; i = (i + 1) & mask) + rte_pktmbuf_free_seg(rxq->sw_ring[i].mbuf); + rxq->rxrearm_nb = rxq->nb_rx_desc; + + /* set all entries to NULL */ + memset(rxq->sw_ring, 0, sizeof(rxq->sw_ring[0]) * rxq->nb_rx_desc); +} + +int __attribute__((cold)) +i40e_rxq_vec_setup(struct i40e_rx_queue *rxq) +{ + uintptr_t p; + struct rte_mbuf mb_def = { .buf_addr = 0 }; /* zeroed mbuf */ + + mb_def.nb_segs = 1; + mb_def.data_off = RTE_PKTMBUF_HEADROOM; + mb_def.port = rxq->port_id; + rte_mbuf_refcnt_set(&mb_def, 1); + + /* prevent compiler reordering: rearm_data covers previous fields */ + rte_compiler_barrier(); + p = (uintptr_t)&mb_def.rearm_data; + rxq->mbuf_initializer = *(uint64_t *)p; + return 0; +} + +int __attribute__((cold)) +i40e_txq_vec_setup(struct i40e_tx_queue __rte_unused *txq) +{ + return 0; +} + +int __attribute__((cold)) +i40e_rx_vec_dev_conf_condition_check(struct rte_eth_dev *dev) +{ +#ifndef RTE_LIBRTE_IEEE1588 + struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode; + struct rte_fdir_conf *fconf = &dev->data->dev_conf.fdir_conf; + +#ifndef RTE_LIBRTE_I40E_RX_OLFLAGS_ENABLE + /* whithout rx ol_flags, no VP flag report */ + if (rxmode->hw_vlan_strip != 0 || + rxmode->hw_vlan_extend != 0) + return -1; +#endif + + /* no fdir support */ + if (fconf->mode != RTE_FDIR_MODE_NONE) + return -1; + + /* - no csum error report support + * - no header split support + */ + if (rxmode->hw_ip_checksum == 1 || + rxmode->header_split == 1) + return -1; + + return 0; +#else + RTE_SET_USED(dev); + return -1; +#endif +} |