--- /dev/null
+/*-
+ * 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 "ixgbe_ethdev.h"
+#include "ixgbe_rxtx.h"
+
+#include <tmmintrin.h>
+
+#ifndef __INTEL_COMPILER
+#pragma GCC diagnostic ignored "-Wcast-qual"
+#endif
+
+static inline void
+ixgbe_rxq_rearm(struct ixgbe_rx_queue *rxq)
+{
+ int i;
+ uint16_t rx_id;
+ volatile union ixgbe_adv_rx_desc *rxdp;
+ struct ixgbe_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;
+
+ const __m128i hba_msk = _mm_set_epi64x(0, UINT64_MAX);
+
+ rxdp = rxq->rx_ring + rxq->rxrearm_start;
+
+ /* Pull 'n' more MBUFs into the software ring */
+ if (rte_mempool_get_bulk(rxq->mb_pool,
+ (void *)rxep,
+ RTE_IXGBE_RXQ_REARM_THRESH) < 0) {
+ if (rxq->rxrearm_nb + RTE_IXGBE_RXQ_REARM_THRESH >=
+ rxq->nb_rx_desc) {
+ dma_addr0 = _mm_setzero_si128();
+ for (i = 0; i < RTE_IXGBE_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_IXGBE_RXQ_REARM_THRESH;
+ return;
+ }
+
+ /* Initialize the mbufs in vector, process 2 mbufs in one loop */
+ for (i = 0; i < RTE_IXGBE_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);
+
+ /* set Header Buffer Address to zero */
+ dma_addr0 = _mm_and_si128(dma_addr0, hba_msk);
+ dma_addr1 = _mm_and_si128(dma_addr1, hba_msk);
+
+ /* 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_IXGBE_RXQ_REARM_THRESH;
+ if (rxq->rxrearm_start >= rxq->nb_rx_desc)
+ rxq->rxrearm_start = 0;
+
+ rxq->rxrearm_nb -= RTE_IXGBE_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 */
+ IXGBE_PCI_REG_WRITE(rxq->rdt_reg_addr, 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_IXGBE_RX_OLFLAGS_ENABLE
+
+#define VTAG_SHIFT (3)
+
+static inline void
+desc_to_olflags_v(__m128i descs[4], struct rte_mbuf **rx_pkts)
+{
+ __m128i ptype0, ptype1, vtag0, vtag1;
+ union {
+ uint16_t e[4];
+ uint64_t dword;
+ } vol;
+
+ /* pkt type + vlan olflags mask */
+ const __m128i pkttype_msk = _mm_set_epi16(
+ 0x0000, 0x0000, 0x0000, 0x0000,
+ PKT_RX_VLAN_PKT, PKT_RX_VLAN_PKT, PKT_RX_VLAN_PKT, PKT_RX_VLAN_PKT);
+
+ /* mask everything except rss type */
+ const __m128i rsstype_msk = _mm_set_epi16(
+ 0x0000, 0x0000, 0x0000, 0x0000,
+ 0x000F, 0x000F, 0x000F, 0x000F);
+
+ /* map rss type to rss hash flag */
+ const __m128i rss_flags = _mm_set_epi8(PKT_RX_FDIR, 0, 0, 0,
+ 0, 0, 0, PKT_RX_RSS_HASH,
+ PKT_RX_RSS_HASH, 0, PKT_RX_RSS_HASH, 0,
+ PKT_RX_RSS_HASH, PKT_RX_RSS_HASH, PKT_RX_RSS_HASH, 0);
+
+ ptype0 = _mm_unpacklo_epi16(descs[0], descs[1]);
+ ptype1 = _mm_unpacklo_epi16(descs[2], descs[3]);
+ vtag0 = _mm_unpackhi_epi16(descs[0], descs[1]);
+ vtag1 = _mm_unpackhi_epi16(descs[2], descs[3]);
+
+ ptype0 = _mm_unpacklo_epi32(ptype0, ptype1);
+ ptype0 = _mm_and_si128(ptype0, rsstype_msk);
+ ptype0 = _mm_shuffle_epi8(rss_flags, ptype0);
+
+ vtag1 = _mm_unpacklo_epi32(vtag0, vtag1);
+ vtag1 = _mm_srli_epi16(vtag1, VTAG_SHIFT);
+ vtag1 = _mm_and_si128(vtag1, pkttype_msk);
+
+ vtag1 = _mm_or_si128(ptype0, vtag1);
+ vol.dword = _mm_cvtsi128_si64(vtag1);
+
+ 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
+
+/*
+ * vPMD raw receive routine, only accept(nb_pkts >= RTE_IXGBE_DESCS_PER_LOOP)
+ *
+ * Notice:
+ * - nb_pkts < RTE_IXGBE_DESCS_PER_LOOP, just return no packet
+ * - nb_pkts > RTE_IXGBE_MAX_RX_BURST, only scan RTE_IXGBE_MAX_RX_BURST
+ * numbers of DD bit
+ * - floor align nb_pkts to a RTE_IXGBE_DESC_PER_LOOP power-of-two
+ * - don't support ol_flags for rss and csum err
+ */
+static inline uint16_t
+_recv_raw_pkts_vec(struct ixgbe_rx_queue *rxq, struct rte_mbuf **rx_pkts,
+ uint16_t nb_pkts, uint8_t *split_packet)
+{
+ volatile union ixgbe_adv_rx_desc *rxdp;
+ struct ixgbe_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_IXGBE_MAX_RX_BURST */
+ nb_pkts = RTE_MIN(nb_pkts, RTE_IXGBE_MAX_RX_BURST);
+
+ /* nb_pkts has to be floor-aligned to RTE_IXGBE_DESCS_PER_LOOP */
+ nb_pkts = RTE_ALIGN_FLOOR(nb_pkts, RTE_IXGBE_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_IXGBE_RXQ_REARM_THRESH)
+ ixgbe_rxq_rearm(rxq);
+
+ /* Before we start moving massive data around, check to see if
+ * there is actually a packet available */
+ if (!(rxdp->wb.upper.status_error &
+ rte_cpu_to_le_32(IXGBE_RXDADV_STAT_DD)))
+ 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 */
+ 15, 14, /* octet 14~15, low 16 bits vlan_macip */
+ 13, 12, /* octet 12~13, 16 bits data_len */
+ 0xFF, 0xFF, /* skip high 16 bits pkt_len, zero out */
+ 13, 12, /* octet 12~13, low 16 bits pkt_len */
+ 0xFF, 0xFF, /* skip 32 bit pkt_type */
+ 0xFF, 0xFF
+ );
+
+ /* 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 < nb_pkts;
+ pos += RTE_IXGBE_DESCS_PER_LOOP,
+ rxdp += RTE_IXGBE_DESCS_PER_LOOP) {
+ __m128i descs[RTE_IXGBE_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);
+ }
+
+ /* 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);
+
+ /* 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.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]);
+
+ /* set ol_flags with vlan packet type */
+ 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);
+
+ /* 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_IXGBE_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_IXGBE_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;
+}
+
+/*
+ * vPMD receive routine, only accept(nb_pkts >= RTE_IXGBE_DESCS_PER_LOOP)
+ *
+ * Notice:
+ * - nb_pkts < RTE_IXGBE_DESCS_PER_LOOP, just return no packet
+ * - nb_pkts > RTE_IXGBE_MAX_RX_BURST, only scan RTE_IXGBE_MAX_RX_BURST
+ * numbers of DD bit
+ * - floor align nb_pkts to a RTE_IXGBE_DESC_PER_LOOP power-of-two
+ * - don't support ol_flags for rss and csum err
+ */
+uint16_t
+ixgbe_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 ixgbe_rx_queue *rxq, struct rte_mbuf **rx_bufs,
+ uint16_t nb_bufs, uint8_t *split_flags)
+{
+ struct rte_mbuf *pkts[nb_bufs]; /*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;
+
+ start->nb_segs--;
+ 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:
+ * - don't support ol_flags for rss and csum err
+ * - nb_pkts < RTE_IXGBE_DESCS_PER_LOOP, just return no packet
+ * - nb_pkts > RTE_IXGBE_MAX_RX_BURST, only scan RTE_IXGBE_MAX_RX_BURST
+ * numbers of DD bit
+ * - floor align nb_pkts to a RTE_IXGBE_DESC_PER_LOOP power-of-two
+ */
+uint16_t
+ixgbe_recv_scattered_pkts_vec(void *rx_queue, struct rte_mbuf **rx_pkts,
+ uint16_t nb_pkts)
+{
+ struct ixgbe_rx_queue *rxq = rx_queue;
+ uint8_t split_flags[RTE_IXGBE_MAX_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 union ixgbe_adv_tx_desc *txdp,
+ struct rte_mbuf *pkt, uint64_t flags)
+{
+ __m128i descriptor = _mm_set_epi64x((uint64_t)pkt->pkt_len << 46 |
+ flags | pkt->data_len,
+ pkt->buf_physaddr + pkt->data_off);
+ _mm_store_si128((__m128i *)&txdp->read, descriptor);
+}
+
+static inline void
+vtx(volatile union ixgbe_adv_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))
+ixgbe_tx_free_bufs(struct ixgbe_tx_queue *txq)
+{
+ struct ixgbe_tx_entry_v *txep;
+ uint32_t status;
+ uint32_t n;
+ uint32_t i;
+ int nb_free = 0;
+ struct rte_mbuf *m, *free[RTE_IXGBE_TX_MAX_FREE_BUF_SZ];
+
+ /* check DD bit on threshold descriptor */
+ status = txq->tx_ring[txq->tx_next_dd].wb.status;
+ if (!(status & IXGBE_ADVTXD_STAT_DD))
+ 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_v[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 ixgbe_tx_entry_v *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
+ixgbe_xmit_pkts_vec(void *tx_queue, struct rte_mbuf **tx_pkts,
+ uint16_t nb_pkts)
+{
+ struct ixgbe_tx_queue *txq = (struct ixgbe_tx_queue *)tx_queue;
+ volatile union ixgbe_adv_tx_desc *txdp;
+ struct ixgbe_tx_entry_v *txep;
+ uint16_t n, nb_commit, tx_id;
+ uint64_t flags = DCMD_DTYP_FLAGS;
+ uint64_t rs = IXGBE_ADVTXD_DCMD_RS|DCMD_DTYP_FLAGS;
+ 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)
+ ixgbe_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_v[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_v[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].read.cmd_type_len |=
+ rte_cpu_to_le_32(IXGBE_ADVTXD_DCMD_RS);
+ txq->tx_next_rs = (uint16_t)(txq->tx_next_rs +
+ txq->tx_rs_thresh);
+ }
+
+ txq->tx_tail = tx_id;
+
+ IXGBE_PCI_REG_WRITE(txq->tdt_reg_addr, txq->tx_tail);
+
+ return nb_pkts;
+}
+
+static void __attribute__((cold))
+ixgbe_tx_queue_release_mbufs_vec(struct ixgbe_tx_queue *txq)
+{
+ unsigned i;
+ struct ixgbe_tx_entry_v *txe;
+ const uint16_t max_desc = (uint16_t)(txq->nb_tx_desc - 1);
+
+ if (txq->sw_ring == NULL || txq->nb_tx_free == max_desc)
+ return;
+
+ /* release the used mbufs in sw_ring */
+ for (i = txq->tx_next_dd - (txq->tx_rs_thresh - 1);
+ i != txq->tx_tail;
+ i = (i + 1) & max_desc) {
+ txe = &txq->sw_ring_v[i];
+ rte_pktmbuf_free_seg(txe->mbuf);
+ }
+ txq->nb_tx_free = max_desc;
+
+ /* reset tx_entry */
+ for (i = 0; i < txq->nb_tx_desc; i++) {
+ txe = &txq->sw_ring_v[i];
+ txe->mbuf = NULL;
+ }
+}
+
+void __attribute__((cold))
+ixgbe_rx_queue_release_mbufs_vec(struct ixgbe_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);
+}
+
+static void __attribute__((cold))
+ixgbe_tx_free_swring(struct ixgbe_tx_queue *txq)
+{
+ if (txq == NULL)
+ return;
+
+ if (txq->sw_ring != NULL) {
+ rte_free(txq->sw_ring_v - 1);
+ txq->sw_ring_v = NULL;
+ }
+}
+
+static void __attribute__((cold))
+ixgbe_reset_tx_queue(struct ixgbe_tx_queue *txq)
+{
+ static const union ixgbe_adv_tx_desc zeroed_desc = {{0}};
+ struct ixgbe_tx_entry_v *txe = txq->sw_ring_v;
+ uint16_t i;
+
+ /* Zero out HW ring memory */
+ for (i = 0; i < txq->nb_tx_desc; i++)
+ txq->tx_ring[i] = zeroed_desc;
+
+ /* Initialize SW ring entries */
+ for (i = 0; i < txq->nb_tx_desc; i++) {
+ volatile union ixgbe_adv_tx_desc *txd = &txq->tx_ring[i];
+ txd->wb.status = IXGBE_TXD_STAT_DD;
+ txe[i].mbuf = NULL;
+ }
+
+ txq->tx_next_dd = (uint16_t)(txq->tx_rs_thresh - 1);
+ txq->tx_next_rs = (uint16_t)(txq->tx_rs_thresh - 1);
+
+ txq->tx_tail = 0;
+ txq->nb_tx_used = 0;
+ /*
+ * Always allow 1 descriptor to be un-allocated to avoid
+ * a H/W race condition
+ */
+ txq->last_desc_cleaned = (uint16_t)(txq->nb_tx_desc - 1);
+ txq->nb_tx_free = (uint16_t)(txq->nb_tx_desc - 1);
+ txq->ctx_curr = 0;
+ memset((void *)&txq->ctx_cache, 0,
+ IXGBE_CTX_NUM * sizeof(struct ixgbe_advctx_info));
+}
+
+static const struct ixgbe_txq_ops vec_txq_ops = {
+ .release_mbufs = ixgbe_tx_queue_release_mbufs_vec,
+ .free_swring = ixgbe_tx_free_swring,
+ .reset = ixgbe_reset_tx_queue,
+};
+
+int __attribute__((cold))
+ixgbe_rxq_vec_setup(struct ixgbe_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))
+ixgbe_txq_vec_setup(struct ixgbe_tx_queue *txq)
+{
+ if (txq->sw_ring_v == NULL)
+ return -1;
+
+ /* leave the first one for overflow */
+ txq->sw_ring_v = txq->sw_ring_v + 1;
+ txq->ops = &vec_txq_ops;
+
+ return 0;
+}
+
+int __attribute__((cold))
+ixgbe_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_IXGBE_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
+}
Code Review / deb_dpdk.git / blobdiff