doc: update release notes for hns3 driver
[dpdk.git] / drivers / net / i40e / i40e_rxtx_vec_neon.c
index d0e6040..6f874e4 100644 (file)
@@ -1,40 +1,12 @@
-/*-
- *   BSD LICENSE
- *
- *   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
- *   Copyright(c) 2016, Linaro Limited
- *   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.
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2015 Intel Corporation.
+ * Copyright(c) 2016-2018, Linaro Limited.
  */
 
 #include <stdint.h>
-#include <rte_ethdev.h>
+#include <rte_ethdev_driver.h>
 #include <rte_malloc.h>
+#include <rte_vect.h>
 
 #include "base/i40e_prototype.h"
 #include "base/i40e_type.h"
@@ -42,7 +14,6 @@
 #include "i40e_rxtx.h"
 #include "i40e_rxtx_vec_common.h"
 
-#include <arm_neon.h>
 
 #pragma GCC diagnostic ignored "-Wcast-qual"
 
@@ -81,13 +52,13 @@ i40e_rxq_rearm(struct i40e_rx_queue *rxq)
                mb0 = rxep[0].mbuf;
                mb1 = rxep[1].mbuf;
 
-               paddr = mb0->buf_physaddr + RTE_PKTMBUF_HEADROOM;
+               paddr = mb0->buf_iova + RTE_PKTMBUF_HEADROOM;
                dma_addr0 = vdupq_n_u64(paddr);
 
                /* flush desc with pa dma_addr */
                vst1q_u64((uint64_t *)&rxdp++->read, dma_addr0);
 
-               paddr = mb1->buf_physaddr + RTE_PKTMBUF_HEADROOM;
+               paddr = mb1->buf_iova + RTE_PKTMBUF_HEADROOM;
                dma_addr1 = vdupq_n_u64(paddr);
                vst1q_u64((uint64_t *)&rxdp++->read, dma_addr1);
        }
@@ -101,8 +72,9 @@ i40e_rxq_rearm(struct i40e_rx_queue *rxq)
        rx_id = (uint16_t)((rxq->rxrearm_start == 0) ?
                             (rxq->nb_rx_desc - 1) : (rxq->rxrearm_start - 1));
 
+       rte_cio_wmb();
        /* Update the tail pointer on the NIC */
-       I40E_PCI_REG_WRITE(rxq->qrx_tail, rx_id);
+       I40E_PCI_REG_WRITE_RELAXED(rxq->qrx_tail, rx_id);
 }
 
 static inline void
@@ -197,12 +169,11 @@ desc_to_olflags_v(struct i40e_rx_queue *rxq, uint64x2_t descs[4],
 }
 
 #define PKTLEN_SHIFT     10
-
-#define I40E_VPMD_DESC_DD_MASK 0x0001000100010001ULL
+#define I40E_UINT16_BIT (CHAR_BIT * sizeof(uint16_t))
 
 static inline void
-desc_to_ptype_v(uint64x2_t descs[4], struct rte_mbuf **rx_pkts,
-               uint32_t *ptype_tbl)
+desc_to_ptype_v(uint64x2_t descs[4], struct rte_mbuf **__rte_restrict rx_pkts,
+               uint32_t *__rte_restrict ptype_tbl)
 {
        int i;
        uint8_t ptype;
@@ -223,14 +194,14 @@ desc_to_ptype_v(uint64x2_t descs[4], struct rte_mbuf **rx_pkts,
  *   numbers of DD bits
  */
 static inline uint16_t
-_recv_raw_pkts_vec(struct i40e_rx_queue *rxq, struct rte_mbuf **rx_pkts,
+_recv_raw_pkts_vec(struct i40e_rx_queue *__rte_restrict rxq,
+                  struct rte_mbuf **__rte_restrict 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;
        uint32_t *ptype_tbl = rxq->vsi->adapter->ptype_tbl;
 
        /* mask to shuffle from desc. to mbuf */
@@ -316,7 +287,6 @@ _recv_raw_pkts_vec(struct i40e_rx_queue *rxq, struct rte_mbuf **rx_pkts,
                /* Read desc statuses backwards to avoid race condition */
                /* A.1 load 4 pkts desc */
                descs[3] =  vld1q_u64((uint64_t *)(rxdp + 3));
-               rte_rmb();
 
                /* B.2 copy 2 mbuf point into rx_pkts  */
                vst1q_u64((uint64_t *)&rx_pkts[pos], mbp1);
@@ -339,9 +309,6 @@ _recv_raw_pkts_vec(struct i40e_rx_queue *rxq, struct rte_mbuf **rx_pkts,
                        rte_mbuf_prefetch_part2(rx_pkts[pos + 3]);
                }
 
-               /* avoid compiler reorder optimization */
-               rte_compiler_barrier();
-
                /* pkt 3,4 shift the pktlen field to be 16-bit aligned*/
                uint32x4_t len3 = vshlq_u32(vreinterpretq_u32_u64(descs[3]),
                                            len_shl);
@@ -364,7 +331,6 @@ _recv_raw_pkts_vec(struct i40e_rx_queue *rxq, struct rte_mbuf **rx_pkts,
                /* C.2 get 4 pkts staterr value  */
                staterr = vzipq_u16(sterr_tmp1.val[1],
                                    sterr_tmp2.val[1]).val[0];
-               stat = vgetq_lane_u64(vreinterpretq_u64_u16(staterr), 0);
 
                desc_to_olflags_v(rxq, descs, &rx_pkts[pos]);
 
@@ -429,6 +395,12 @@ _recv_raw_pkts_vec(struct i40e_rx_queue *rxq, struct rte_mbuf **rx_pkts,
                        rx_pkts[pos + 3]->next = NULL;
                }
 
+               staterr = vshlq_n_u16(staterr, I40E_UINT16_BIT - 1);
+               staterr = vreinterpretq_u16_s16(
+                               vshrq_n_s16(vreinterpretq_s16_u16(staterr),
+                                           I40E_UINT16_BIT - 1));
+               stat = ~vgetq_lane_u64(vreinterpretq_u64_u16(staterr), 0);
+
                rte_prefetch_non_temporal(rxdp + RTE_I40E_DESCS_PER_LOOP);
 
                /* D.3 copy final 1,2 data to rx_pkts */
@@ -438,10 +410,12 @@ _recv_raw_pkts_vec(struct i40e_rx_queue *rxq, struct rte_mbuf **rx_pkts,
                         pkt_mb1);
                desc_to_ptype_v(descs, &rx_pkts[pos], ptype_tbl);
                /* C.4 calc avaialbe number of desc */
-               var = __builtin_popcountll(stat & I40E_VPMD_DESC_DD_MASK);
-               nb_pkts_recd += var;
-               if (likely(var != RTE_I40E_DESCS_PER_LOOP))
+               if (unlikely(stat == 0)) {
+                       nb_pkts_recd += RTE_I40E_DESCS_PER_LOOP;
+               } else {
+                       nb_pkts_recd += __builtin_ctzl(stat) / I40E_UINT16_BIT;
                        break;
+               }
        }
 
        /* Update our internal tail pointer */
@@ -459,8 +433,8 @@ _recv_raw_pkts_vec(struct i40e_rx_queue *rxq, struct rte_mbuf **rx_pkts,
  *   numbers of DD bits
  */
 uint16_t
-i40e_recv_pkts_vec(void *rx_queue, struct rte_mbuf **rx_pkts,
-                  uint16_t nb_pkts)
+i40e_recv_pkts_vec(void *__rte_restrict rx_queue,
+               struct rte_mbuf **__rte_restrict rx_pkts, uint16_t nb_pkts)
 {
        return _recv_raw_pkts_vec(rx_queue, rx_pkts, nb_pkts, NULL);
 }
@@ -502,6 +476,7 @@ i40e_recv_scattered_pkts_vec(void *rx_queue, struct rte_mbuf **rx_pkts,
                        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]);
@@ -515,13 +490,13 @@ vtx1(volatile struct i40e_tx_desc *txdp,
                        ((uint64_t)flags  << I40E_TXD_QW1_CMD_SHIFT) |
                        ((uint64_t)pkt->data_len << I40E_TXD_QW1_TX_BUF_SZ_SHIFT));
 
-       uint64x2_t descriptor = {pkt->buf_physaddr + pkt->data_off, high_qw};
+       uint64x2_t descriptor = {pkt->buf_iova + pkt->data_off, high_qw};
        vst1q_u64((uint64_t *)txdp, descriptor);
 }
 
 static inline void
-vtx(volatile struct i40e_tx_desc *txdp,
-               struct rte_mbuf **pkt, uint16_t nb_pkts,  uint64_t flags)
+vtx(volatile struct i40e_tx_desc *txdp, struct rte_mbuf **pkt,
+               uint16_t nb_pkts,  uint64_t flags)
 {
        int i;
 
@@ -530,8 +505,8 @@ vtx(volatile struct i40e_tx_desc *txdp,
 }
 
 uint16_t
-i40e_xmit_fixed_burst_vec(void *tx_queue, struct rte_mbuf **tx_pkts,
-                         uint16_t nb_pkts)
+i40e_xmit_fixed_burst_vec(void *__rte_restrict tx_queue,
+       struct rte_mbuf **__rte_restrict tx_pkts, uint16_t nb_pkts)
 {
        struct i40e_tx_queue *txq = (struct i40e_tx_queue *)tx_queue;
        volatile struct i40e_tx_desc *txdp;
@@ -591,30 +566,31 @@ i40e_xmit_fixed_burst_vec(void *tx_queue, struct rte_mbuf **tx_pkts,
 
        txq->tx_tail = tx_id;
 
-       I40E_PCI_REG_WRITE(txq->qtx_tail, txq->tx_tail);
+       rte_cio_wmb();
+       I40E_PCI_REG_WRITE_RELAXED(txq->qtx_tail, tx_id);
 
        return nb_pkts;
 }
 
-void __attribute__((cold))
+void __rte_cold
 i40e_rx_queue_release_mbufs_vec(struct i40e_rx_queue *rxq)
 {
        _i40e_rx_queue_release_mbufs_vec(rxq);
 }
 
-int __attribute__((cold))
+int __rte_cold
 i40e_rxq_vec_setup(struct i40e_rx_queue *rxq)
 {
        return i40e_rxq_vec_setup_default(rxq);
 }
 
-int __attribute__((cold))
+int __rte_cold
 i40e_txq_vec_setup(struct i40e_tx_queue __rte_unused *txq)
 {
        return 0;
 }
 
-int __attribute__((cold))
+int __rte_cold
 i40e_rx_vec_dev_conf_condition_check(struct rte_eth_dev *dev)
 {
        return i40e_rx_vec_dev_conf_condition_check_default(dev);