From: Wenzhuo Lu Date: Tue, 26 Mar 2019 06:16:51 +0000 (+0800) Subject: net/ice: support vector AVX2 in Tx X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=2d5f6953d56d;p=dpdk.git net/ice: support vector AVX2 in Tx Signed-off-by: Wenzhuo Lu Acked-by: Qi Zhang --- diff --git a/doc/guides/nics/ice.rst b/doc/guides/nics/ice.rst index 3998d5e012..fdbc02efa5 100644 --- a/doc/guides/nics/ice.rst +++ b/doc/guides/nics/ice.rst @@ -64,6 +64,24 @@ Driver compilation and testing Refer to the document :ref:`compiling and testing a PMD for a NIC ` for details. +Features +-------- + +Vector PMD +~~~~~~~~~~ + +Vector PMD for RX and TX path are selected automatically. The paths +are chosen based on 2 conditions. + +- ``CPU`` + On the X86 platform, the driver checks if the CPU supports AVX2. + If it's supported, AVX2 paths will be chosen. If not, SSE is chosen. + +- ``Offload features`` + The supported HW offload features are described in the document ice_vec.ini. + If any not supported features are used, ICE vector PMD is disabled and the + normal paths are chosen. + Sample Application Notes ------------------------ diff --git a/doc/guides/rel_notes/release_19_05.rst b/doc/guides/rel_notes/release_19_05.rst index 86132821b1..ac6db18ccf 100644 --- a/doc/guides/rel_notes/release_19_05.rst +++ b/doc/guides/rel_notes/release_19_05.rst @@ -100,6 +100,10 @@ New Features * Added promiscuous mode support. +* **Updated the ice driver.** + + * Added support of SSE and AVX2 instructions in Rx and Tx paths. + * **Updated the QuickAssist Technology PMD.** Added support for AES-XTS with 128 and 256 bit AES keys. diff --git a/drivers/net/ice/ice_rxtx.c b/drivers/net/ice/ice_rxtx.c index 860155f16c..52640553d6 100644 --- a/drivers/net/ice/ice_rxtx.c +++ b/drivers/net/ice/ice_rxtx.c @@ -2356,15 +2356,24 @@ ice_set_tx_function(struct rte_eth_dev *dev) #ifdef RTE_ARCH_X86 struct ice_tx_queue *txq; int i; + bool use_avx2 = false; if (!ice_tx_vec_dev_check(dev)) { for (i = 0; i < dev->data->nb_tx_queues; i++) { txq = dev->data->tx_queues[i]; (void)ice_txq_vec_setup(txq); } - PMD_DRV_LOG(DEBUG, "Using Vector Tx (port %d).", + + if (rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX2) == 1 || + rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX512F) == 1) + use_avx2 = true; + + PMD_DRV_LOG(DEBUG, "Using %sVector Tx (port %d).", + use_avx2 ? "avx2 " : "", dev->data->port_id); - dev->tx_pkt_burst = ice_xmit_pkts_vec; + dev->tx_pkt_burst = use_avx2 ? + ice_xmit_pkts_vec_avx2 : + ice_xmit_pkts_vec; dev->tx_pkt_prepare = NULL; return; diff --git a/drivers/net/ice/ice_rxtx.h b/drivers/net/ice/ice_rxtx.h index dfc3224ccb..64e9f20dd2 100644 --- a/drivers/net/ice/ice_rxtx.h +++ b/drivers/net/ice/ice_rxtx.h @@ -184,4 +184,6 @@ uint16_t ice_recv_pkts_vec_avx2(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t ice_recv_scattered_pkts_vec_avx2(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts); +uint16_t ice_xmit_pkts_vec_avx2(void *tx_queue, struct rte_mbuf **tx_pkts, + uint16_t nb_pkts); #endif /* _ICE_RXTX_H_ */ diff --git a/drivers/net/ice/ice_rxtx_vec_avx2.c b/drivers/net/ice/ice_rxtx_vec_avx2.c index 2459ff33ba..fac869a420 100644 --- a/drivers/net/ice/ice_rxtx_vec_avx2.c +++ b/drivers/net/ice/ice_rxtx_vec_avx2.c @@ -684,3 +684,161 @@ ice_recv_scattered_pkts_vec_avx2(void *rx_queue, struct rte_mbuf **rx_pkts, return retval + ice_recv_scattered_burst_vec_avx2(rx_queue, rx_pkts + retval, nb_pkts); } + +static inline void +ice_vtx1(volatile struct ice_tx_desc *txdp, + struct rte_mbuf *pkt, uint64_t flags) +{ + uint64_t high_qw = + (ICE_TX_DESC_DTYPE_DATA | + ((uint64_t)flags << ICE_TXD_QW1_CMD_S) | + ((uint64_t)pkt->data_len << ICE_TXD_QW1_TX_BUF_SZ_S)); + + __m128i descriptor = _mm_set_epi64x(high_qw, + pkt->buf_physaddr + pkt->data_off); + _mm_store_si128((__m128i *)txdp, descriptor); +} + +static inline void +ice_vtx(volatile struct ice_tx_desc *txdp, + struct rte_mbuf **pkt, uint16_t nb_pkts, uint64_t flags) +{ + const uint64_t hi_qw_tmpl = (ICE_TX_DESC_DTYPE_DATA | + ((uint64_t)flags << ICE_TXD_QW1_CMD_S)); + + /* if unaligned on 32-bit boundary, do one to align */ + if (((uintptr_t)txdp & 0x1F) != 0 && nb_pkts != 0) { + ice_vtx1(txdp, *pkt, flags); + nb_pkts--, txdp++, pkt++; + } + + /* do two at a time while possible, in bursts */ + for (; nb_pkts > 3; txdp += 4, pkt += 4, nb_pkts -= 4) { + uint64_t hi_qw3 = + hi_qw_tmpl | + ((uint64_t)pkt[3]->data_len << + ICE_TXD_QW1_TX_BUF_SZ_S); + uint64_t hi_qw2 = + hi_qw_tmpl | + ((uint64_t)pkt[2]->data_len << + ICE_TXD_QW1_TX_BUF_SZ_S); + uint64_t hi_qw1 = + hi_qw_tmpl | + ((uint64_t)pkt[1]->data_len << + ICE_TXD_QW1_TX_BUF_SZ_S); + uint64_t hi_qw0 = + hi_qw_tmpl | + ((uint64_t)pkt[0]->data_len << + ICE_TXD_QW1_TX_BUF_SZ_S); + + __m256i desc2_3 = + _mm256_set_epi64x + (hi_qw3, + pkt[3]->buf_physaddr + pkt[3]->data_off, + hi_qw2, + pkt[2]->buf_physaddr + pkt[2]->data_off); + __m256i desc0_1 = + _mm256_set_epi64x + (hi_qw1, + pkt[1]->buf_physaddr + pkt[1]->data_off, + hi_qw0, + pkt[0]->buf_physaddr + pkt[0]->data_off); + _mm256_store_si256((void *)(txdp + 2), desc2_3); + _mm256_store_si256((void *)txdp, desc0_1); + } + + /* do any last ones */ + while (nb_pkts) { + ice_vtx1(txdp, *pkt, flags); + txdp++, pkt++, nb_pkts--; + } +} + +static inline uint16_t +ice_xmit_fixed_burst_vec_avx2(void *tx_queue, struct rte_mbuf **tx_pkts, + uint16_t nb_pkts) +{ + struct ice_tx_queue *txq = (struct ice_tx_queue *)tx_queue; + volatile struct ice_tx_desc *txdp; + struct ice_tx_entry *txep; + uint16_t n, nb_commit, tx_id; + uint64_t flags = ICE_TD_CMD; + uint64_t rs = ICE_TX_DESC_CMD_RS | ICE_TD_CMD; + + /* 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) + ice_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) { + ice_tx_backlog_entry(txep, tx_pkts, n); + + ice_vtx(txdp, tx_pkts, n - 1, flags); + tx_pkts += (n - 1); + txdp += (n - 1); + + ice_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]; + } + + ice_tx_backlog_entry(txep, tx_pkts, nb_commit); + + ice_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)ICE_TX_DESC_CMD_RS) << + ICE_TXD_QW1_CMD_S); + txq->tx_next_rs = + (uint16_t)(txq->tx_next_rs + txq->tx_rs_thresh); + } + + txq->tx_tail = tx_id; + + ICE_PCI_REG_WRITE(txq->qtx_tail, txq->tx_tail); + + return nb_pkts; +} + +uint16_t +ice_xmit_pkts_vec_avx2(void *tx_queue, struct rte_mbuf **tx_pkts, + uint16_t nb_pkts) +{ + uint16_t nb_tx = 0; + struct ice_tx_queue *txq = (struct ice_tx_queue *)tx_queue; + + while (nb_pkts) { + uint16_t ret, num; + + num = (uint16_t)RTE_MIN(nb_pkts, txq->tx_rs_thresh); + ret = ice_xmit_fixed_burst_vec_avx2(tx_queue, &tx_pkts[nb_tx], + num); + nb_tx += ret; + nb_pkts -= ret; + if (ret < num) + break; + } + + return nb_tx; +}