From patchwork Thu Oct 21 09:49:59 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiawen Wu X-Patchwork-Id: 102546 X-Patchwork-Delegate: ferruh.yigit@amd.com Return-Path: X-Original-To: patchwork@inbox.dpdk.org Delivered-To: patchwork@inbox.dpdk.org Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id BC2FBA0547; Thu, 21 Oct 2021 11:50:59 +0200 (CEST) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id B1BCB411E4; Thu, 21 Oct 2021 11:50:42 +0200 (CEST) Received: from smtpbguseast1.qq.com (smtpbguseast1.qq.com [54.204.34.129]) by mails.dpdk.org (Postfix) with ESMTP id BF4F1411CA for ; Thu, 21 Oct 2021 11:50:39 +0200 (CEST) X-QQ-mid: bizesmtp38t1634809831tq6mc2de Received: from jiawenwu.trustnetic.com (unknown [183.129.236.74]) by esmtp6.qq.com (ESMTP) with id ; Thu, 21 Oct 2021 17:50:30 +0800 (CST) X-QQ-SSF: 01400000000000E0I000000A0000000 X-QQ-FEAT: RN62psZUPUOgVRgoTOK4FCBkqhtec4mCOwkt9JlqoAcD9hn+1p5fdhY9HW+c2 XlC4k3nhRhiQVeYlT1rJnoDK9OqralMi3ZYzY0Vj8h6aJUMJD2mZp6tTLYe8U3eO0aZrTT8 b6rItAbb4HlOcCiICpEBGrWbwDllR4FeMHcWmBGFyvV+DysVCyAPRGMUCKDH09RmaZGWobb vVjYD1Buknu2edL3IYnpRxup/2Iq6B3fi7ZzpT4AAtzllyU8fSbOuL8o69bwdc2wlS9PfYs lgU/cAQN76i9/6ONAg7gr6bdNBhA3YaTstC8r4iqOxap0wVLlTBYSi7dZ/mu00Oe+k93fpQ HHXzVLkUfB1bUitoIvzHhccsfBHWFm5eNFMb3+LCkg19h5hqsY= X-QQ-GoodBg: 2 From: Jiawen Wu To: dev@dpdk.org Cc: Jiawen Wu Date: Thu, 21 Oct 2021 17:49:59 +0800 Message-Id: <20211021095023.18288-3-jiawenwu@trustnetic.com> X-Mailer: git-send-email 2.21.0.windows.1 In-Reply-To: <20211021095023.18288-1-jiawenwu@trustnetic.com> References: <20211021095023.18288-1-jiawenwu@trustnetic.com> MIME-Version: 1.0 X-QQ-SENDSIZE: 520 Feedback-ID: bizesmtp:trustnetic.com:qybgforeign:qybgforeign7 X-QQ-Bgrelay: 1 Subject: [dpdk-dev] [PATCH v2 02/26] net/ngbe: support scattered Rx X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Add scattered Rx function to support receiving segmented mbufs. Signed-off-by: Jiawen Wu --- doc/guides/nics/features/ngbe.ini | 1 + doc/guides/nics/ngbe.rst | 1 + doc/guides/rel_notes/release_21_11.rst | 2 +- drivers/net/ngbe/ngbe_ethdev.c | 20 +- drivers/net/ngbe/ngbe_ethdev.h | 8 + drivers/net/ngbe/ngbe_rxtx.c | 537 +++++++++++++++++++++++++ drivers/net/ngbe/ngbe_rxtx.h | 4 + 7 files changed, 570 insertions(+), 3 deletions(-) diff --git a/doc/guides/nics/features/ngbe.ini b/doc/guides/nics/features/ngbe.ini index 8b7588184a..f85754eb7a 100644 --- a/doc/guides/nics/features/ngbe.ini +++ b/doc/guides/nics/features/ngbe.ini @@ -8,6 +8,7 @@ Speed capabilities = Y Link status = Y Link status event = Y Queue start/stop = Y +Scattered Rx = Y Packet type parsing = Y Multiprocess aware = Y Linux = Y diff --git a/doc/guides/nics/ngbe.rst b/doc/guides/nics/ngbe.rst index d044397cd5..463452ce8c 100644 --- a/doc/guides/nics/ngbe.rst +++ b/doc/guides/nics/ngbe.rst @@ -13,6 +13,7 @@ Features - Packet type information - Link state information +- Scattered for RX Prerequisites diff --git a/doc/guides/rel_notes/release_21_11.rst b/doc/guides/rel_notes/release_21_11.rst index 8be52954e0..c555ae337c 100644 --- a/doc/guides/rel_notes/release_21_11.rst +++ b/doc/guides/rel_notes/release_21_11.rst @@ -147,7 +147,7 @@ New Features * **Updated Wangxun ngbe driver.** - * Added packet type on RxTx. + * Added offloads and packet type on RxTx. * **Added multi-process support for testpmd.** diff --git a/drivers/net/ngbe/ngbe_ethdev.c b/drivers/net/ngbe/ngbe_ethdev.c index fb21603601..03a07d6cad 100644 --- a/drivers/net/ngbe/ngbe_ethdev.c +++ b/drivers/net/ngbe/ngbe_ethdev.c @@ -140,8 +140,16 @@ eth_ngbe_dev_init(struct rte_eth_dev *eth_dev, void *init_params __rte_unused) eth_dev->rx_pkt_burst = &ngbe_recv_pkts; eth_dev->tx_pkt_burst = &ngbe_xmit_pkts_simple; - if (rte_eal_process_type() != RTE_PROC_PRIMARY) + /* + * For secondary processes, we don't initialise any further as primary + * has already done this work. Only check we don't need a different + * Rx and Tx function. + */ + if (rte_eal_process_type() != RTE_PROC_PRIMARY) { + ngbe_set_rx_function(eth_dev); + return 0; + } rte_eth_copy_pci_info(eth_dev, pci_dev); @@ -528,6 +536,9 @@ ngbe_dev_stop(struct rte_eth_dev *dev) ngbe_dev_clear_queues(dev); + /* Clear stored conf */ + dev->data->scattered_rx = 0; + /* Clear recorded link status */ memset(&link, 0, sizeof(link)); rte_eth_linkstatus_set(dev, &link); @@ -628,6 +639,8 @@ ngbe_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info) dev_info->max_tx_queues = (uint16_t)hw->mac.max_tx_queues; dev_info->min_rx_bufsize = 1024; dev_info->max_rx_pktlen = 15872; + dev_info->rx_offload_capa = (ngbe_get_rx_port_offloads(dev) | + dev_info->rx_queue_offload_capa); dev_info->default_rxconf = (struct rte_eth_rxconf) { .rx_thresh = { @@ -670,7 +683,10 @@ ngbe_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info) const uint32_t * ngbe_dev_supported_ptypes_get(struct rte_eth_dev *dev) { - if (dev->rx_pkt_burst == ngbe_recv_pkts) + if (dev->rx_pkt_burst == ngbe_recv_pkts || + dev->rx_pkt_burst == ngbe_recv_pkts_sc_single_alloc || + dev->rx_pkt_burst == ngbe_recv_pkts_sc_bulk_alloc || + dev->rx_pkt_burst == ngbe_recv_pkts_bulk_alloc) return ngbe_get_supported_ptypes(); return NULL; diff --git a/drivers/net/ngbe/ngbe_ethdev.h b/drivers/net/ngbe/ngbe_ethdev.h index 7f4534208e..80da1938c9 100644 --- a/drivers/net/ngbe/ngbe_ethdev.h +++ b/drivers/net/ngbe/ngbe_ethdev.h @@ -106,6 +106,14 @@ int ngbe_dev_tx_queue_stop(struct rte_eth_dev *dev, uint16_t tx_queue_id); uint16_t ngbe_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts); +uint16_t ngbe_recv_pkts_bulk_alloc(void *rx_queue, struct rte_mbuf **rx_pkts, + uint16_t nb_pkts); + +uint16_t ngbe_recv_pkts_sc_single_alloc(void *rx_queue, + struct rte_mbuf **rx_pkts, uint16_t nb_pkts); +uint16_t ngbe_recv_pkts_sc_bulk_alloc(void *rx_queue, + struct rte_mbuf **rx_pkts, uint16_t nb_pkts); + uint16_t ngbe_xmit_pkts_simple(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts); diff --git a/drivers/net/ngbe/ngbe_rxtx.c b/drivers/net/ngbe/ngbe_rxtx.c index 5f63890a45..ee19da52eb 100644 --- a/drivers/net/ngbe/ngbe_rxtx.c +++ b/drivers/net/ngbe/ngbe_rxtx.c @@ -263,6 +263,243 @@ ngbe_rxd_pkt_info_to_pkt_type(uint32_t pkt_info, uint16_t ptid_mask) return ngbe_decode_ptype(ptid); } +/* + * LOOK_AHEAD defines how many desc statuses to check beyond the + * current descriptor. + * It must be a pound define for optimal performance. + * Do not change the value of LOOK_AHEAD, as the ngbe_rx_scan_hw_ring + * function only works with LOOK_AHEAD=8. + */ +#define LOOK_AHEAD 8 +#if (LOOK_AHEAD != 8) +#error "PMD NGBE: LOOK_AHEAD must be 8\n" +#endif +static inline int +ngbe_rx_scan_hw_ring(struct ngbe_rx_queue *rxq) +{ + volatile struct ngbe_rx_desc *rxdp; + struct ngbe_rx_entry *rxep; + struct rte_mbuf *mb; + uint16_t pkt_len; + int nb_dd; + uint32_t s[LOOK_AHEAD]; + uint32_t pkt_info[LOOK_AHEAD]; + int i, j, nb_rx = 0; + uint32_t status; + + /* get references to current descriptor and S/W ring entry */ + rxdp = &rxq->rx_ring[rxq->rx_tail]; + rxep = &rxq->sw_ring[rxq->rx_tail]; + + status = rxdp->qw1.lo.status; + /* check to make sure there is at least 1 packet to receive */ + if (!(status & rte_cpu_to_le_32(NGBE_RXD_STAT_DD))) + return 0; + + /* + * Scan LOOK_AHEAD descriptors at a time to determine which descriptors + * reference packets that are ready to be received. + */ + for (i = 0; i < RTE_PMD_NGBE_RX_MAX_BURST; + i += LOOK_AHEAD, rxdp += LOOK_AHEAD, rxep += LOOK_AHEAD) { + /* Read desc statuses backwards to avoid race condition */ + for (j = 0; j < LOOK_AHEAD; j++) + s[j] = rte_le_to_cpu_32(rxdp[j].qw1.lo.status); + + rte_atomic_thread_fence(__ATOMIC_ACQUIRE); + + /* Compute how many status bits were set */ + for (nb_dd = 0; nb_dd < LOOK_AHEAD && + (s[nb_dd] & NGBE_RXD_STAT_DD); nb_dd++) + ; + + for (j = 0; j < nb_dd; j++) + pkt_info[j] = rte_le_to_cpu_32(rxdp[j].qw0.dw0); + + nb_rx += nb_dd; + + /* Translate descriptor info to mbuf format */ + for (j = 0; j < nb_dd; ++j) { + mb = rxep[j].mbuf; + pkt_len = rte_le_to_cpu_16(rxdp[j].qw1.hi.len); + mb->data_len = pkt_len; + mb->pkt_len = pkt_len; + + mb->packet_type = + ngbe_rxd_pkt_info_to_pkt_type(pkt_info[j], + NGBE_PTID_MASK); + } + + /* Move mbuf pointers from the S/W ring to the stage */ + for (j = 0; j < LOOK_AHEAD; ++j) + rxq->rx_stage[i + j] = rxep[j].mbuf; + + /* stop if all requested packets could not be received */ + if (nb_dd != LOOK_AHEAD) + break; + } + + /* clear software ring entries so we can cleanup correctly */ + for (i = 0; i < nb_rx; ++i) + rxq->sw_ring[rxq->rx_tail + i].mbuf = NULL; + + return nb_rx; +} + +static inline int +ngbe_rx_alloc_bufs(struct ngbe_rx_queue *rxq, bool reset_mbuf) +{ + volatile struct ngbe_rx_desc *rxdp; + struct ngbe_rx_entry *rxep; + struct rte_mbuf *mb; + uint16_t alloc_idx; + __le64 dma_addr; + int diag, i; + + /* allocate buffers in bulk directly into the S/W ring */ + alloc_idx = rxq->rx_free_trigger - (rxq->rx_free_thresh - 1); + rxep = &rxq->sw_ring[alloc_idx]; + diag = rte_mempool_get_bulk(rxq->mb_pool, (void *)rxep, + rxq->rx_free_thresh); + if (unlikely(diag != 0)) + return -ENOMEM; + + rxdp = &rxq->rx_ring[alloc_idx]; + for (i = 0; i < rxq->rx_free_thresh; ++i) { + /* populate the static rte mbuf fields */ + mb = rxep[i].mbuf; + if (reset_mbuf) + mb->port = rxq->port_id; + + rte_mbuf_refcnt_set(mb, 1); + mb->data_off = RTE_PKTMBUF_HEADROOM; + + /* populate the descriptors */ + dma_addr = rte_cpu_to_le_64(rte_mbuf_data_iova_default(mb)); + NGBE_RXD_HDRADDR(&rxdp[i], 0); + NGBE_RXD_PKTADDR(&rxdp[i], dma_addr); + } + + /* update state of internal queue structure */ + rxq->rx_free_trigger = rxq->rx_free_trigger + rxq->rx_free_thresh; + if (rxq->rx_free_trigger >= rxq->nb_rx_desc) + rxq->rx_free_trigger = rxq->rx_free_thresh - 1; + + /* no errors */ + return 0; +} + +static inline uint16_t +ngbe_rx_fill_from_stage(struct ngbe_rx_queue *rxq, struct rte_mbuf **rx_pkts, + uint16_t nb_pkts) +{ + struct rte_mbuf **stage = &rxq->rx_stage[rxq->rx_next_avail]; + int i; + + /* how many packets are ready to return? */ + nb_pkts = (uint16_t)RTE_MIN(nb_pkts, rxq->rx_nb_avail); + + /* copy mbuf pointers to the application's packet list */ + for (i = 0; i < nb_pkts; ++i) + rx_pkts[i] = stage[i]; + + /* update internal queue state */ + rxq->rx_nb_avail = (uint16_t)(rxq->rx_nb_avail - nb_pkts); + rxq->rx_next_avail = (uint16_t)(rxq->rx_next_avail + nb_pkts); + + return nb_pkts; +} + +static inline uint16_t +ngbe_rx_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, + uint16_t nb_pkts) +{ + struct ngbe_rx_queue *rxq = (struct ngbe_rx_queue *)rx_queue; + struct rte_eth_dev *dev = &rte_eth_devices[rxq->port_id]; + uint16_t nb_rx = 0; + + /* Any previously recv'd pkts will be returned from the Rx stage */ + if (rxq->rx_nb_avail) + return ngbe_rx_fill_from_stage(rxq, rx_pkts, nb_pkts); + + /* Scan the H/W ring for packets to receive */ + nb_rx = (uint16_t)ngbe_rx_scan_hw_ring(rxq); + + /* update internal queue state */ + rxq->rx_next_avail = 0; + rxq->rx_nb_avail = nb_rx; + rxq->rx_tail = (uint16_t)(rxq->rx_tail + nb_rx); + + /* if required, allocate new buffers to replenish descriptors */ + if (rxq->rx_tail > rxq->rx_free_trigger) { + uint16_t cur_free_trigger = rxq->rx_free_trigger; + + if (ngbe_rx_alloc_bufs(rxq, true) != 0) { + int i, j; + + PMD_RX_LOG(DEBUG, "RX mbuf alloc failed port_id=%u " + "queue_id=%u", (uint16_t)rxq->port_id, + (uint16_t)rxq->queue_id); + + dev->data->rx_mbuf_alloc_failed += + rxq->rx_free_thresh; + + /* + * Need to rewind any previous receives if we cannot + * allocate new buffers to replenish the old ones. + */ + rxq->rx_nb_avail = 0; + rxq->rx_tail = (uint16_t)(rxq->rx_tail - nb_rx); + for (i = 0, j = rxq->rx_tail; i < nb_rx; ++i, ++j) + rxq->sw_ring[j].mbuf = rxq->rx_stage[i]; + + return 0; + } + + /* update tail pointer */ + rte_wmb(); + ngbe_set32_relaxed(rxq->rdt_reg_addr, cur_free_trigger); + } + + if (rxq->rx_tail >= rxq->nb_rx_desc) + rxq->rx_tail = 0; + + /* received any packets this loop? */ + if (rxq->rx_nb_avail) + return ngbe_rx_fill_from_stage(rxq, rx_pkts, nb_pkts); + + return 0; +} + +/* split requests into chunks of size RTE_PMD_NGBE_RX_MAX_BURST */ +uint16_t +ngbe_recv_pkts_bulk_alloc(void *rx_queue, struct rte_mbuf **rx_pkts, + uint16_t nb_pkts) +{ + uint16_t nb_rx; + + if (unlikely(nb_pkts == 0)) + return 0; + + if (likely(nb_pkts <= RTE_PMD_NGBE_RX_MAX_BURST)) + return ngbe_rx_recv_pkts(rx_queue, rx_pkts, nb_pkts); + + /* request is relatively large, chunk it up */ + nb_rx = 0; + while (nb_pkts) { + uint16_t ret, n; + + n = (uint16_t)RTE_MIN(nb_pkts, RTE_PMD_NGBE_RX_MAX_BURST); + ret = ngbe_rx_recv_pkts(rx_queue, &rx_pkts[nb_rx], n); + nb_rx = (uint16_t)(nb_rx + ret); + nb_pkts = (uint16_t)(nb_pkts - ret); + if (ret < n) + break; + } + + return nb_rx; +} + uint16_t ngbe_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts) @@ -426,6 +663,246 @@ ngbe_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, return nb_rx; } +static inline void +ngbe_fill_cluster_head_buf(struct rte_mbuf *head, struct ngbe_rx_desc *desc, + struct ngbe_rx_queue *rxq, uint32_t staterr) +{ + uint32_t pkt_info; + + RTE_SET_USED(staterr); + head->port = rxq->port_id; + + pkt_info = rte_le_to_cpu_32(desc->qw0.dw0); + head->packet_type = ngbe_rxd_pkt_info_to_pkt_type(pkt_info, + NGBE_PTID_MASK); +} + +/** + * ngbe_recv_pkts_sc - receive handler for scatter case. + * + * @rx_queue Rx queue handle + * @rx_pkts table of received packets + * @nb_pkts size of rx_pkts table + * @bulk_alloc if TRUE bulk allocation is used for a HW ring refilling + * + * Returns the number of received packets/clusters (according to the "bulk + * receive" interface). + */ +static inline uint16_t +ngbe_recv_pkts_sc(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts, + bool bulk_alloc) +{ + struct ngbe_rx_queue *rxq = rx_queue; + struct rte_eth_dev *dev = &rte_eth_devices[rxq->port_id]; + volatile struct ngbe_rx_desc *rx_ring = rxq->rx_ring; + struct ngbe_rx_entry *sw_ring = rxq->sw_ring; + struct ngbe_scattered_rx_entry *sw_sc_ring = rxq->sw_sc_ring; + uint16_t rx_id = rxq->rx_tail; + uint16_t nb_rx = 0; + uint16_t nb_hold = rxq->nb_rx_hold; + uint16_t prev_id = rxq->rx_tail; + + while (nb_rx < nb_pkts) { + bool eop; + struct ngbe_rx_entry *rxe; + struct ngbe_scattered_rx_entry *sc_entry; + struct ngbe_scattered_rx_entry *next_sc_entry = NULL; + struct ngbe_rx_entry *next_rxe = NULL; + struct rte_mbuf *first_seg; + struct rte_mbuf *rxm; + struct rte_mbuf *nmb = NULL; + struct ngbe_rx_desc rxd; + uint16_t data_len; + uint16_t next_id; + volatile struct ngbe_rx_desc *rxdp; + uint32_t staterr; + +next_desc: + rxdp = &rx_ring[rx_id]; + staterr = rte_le_to_cpu_32(rxdp->qw1.lo.status); + + if (!(staterr & NGBE_RXD_STAT_DD)) + break; + + rxd = *rxdp; + + PMD_RX_LOG(DEBUG, "port_id=%u queue_id=%u rx_id=%u " + "staterr=0x%x data_len=%u", + rxq->port_id, rxq->queue_id, rx_id, staterr, + rte_le_to_cpu_16(rxd.qw1.hi.len)); + + if (!bulk_alloc) { + nmb = rte_mbuf_raw_alloc(rxq->mb_pool); + if (nmb == NULL) { + PMD_RX_LOG(DEBUG, "Rx mbuf alloc failed " + "port_id=%u queue_id=%u", + rxq->port_id, rxq->queue_id); + + dev->data->rx_mbuf_alloc_failed++; + break; + } + } else if (nb_hold > rxq->rx_free_thresh) { + uint16_t next_rdt = rxq->rx_free_trigger; + + if (!ngbe_rx_alloc_bufs(rxq, false)) { + rte_wmb(); + ngbe_set32_relaxed(rxq->rdt_reg_addr, + next_rdt); + nb_hold -= rxq->rx_free_thresh; + } else { + PMD_RX_LOG(DEBUG, "Rx bulk alloc failed " + "port_id=%u queue_id=%u", + rxq->port_id, rxq->queue_id); + + dev->data->rx_mbuf_alloc_failed++; + break; + } + } + + nb_hold++; + rxe = &sw_ring[rx_id]; + eop = staterr & NGBE_RXD_STAT_EOP; + + next_id = rx_id + 1; + if (next_id == rxq->nb_rx_desc) + next_id = 0; + + /* Prefetch next mbuf while processing current one. */ + rte_ngbe_prefetch(sw_ring[next_id].mbuf); + + /* + * When next Rx descriptor is on a cache-line boundary, + * prefetch the next 4 RX descriptors and the next 4 pointers + * to mbufs. + */ + if ((next_id & 0x3) == 0) { + rte_ngbe_prefetch(&rx_ring[next_id]); + rte_ngbe_prefetch(&sw_ring[next_id]); + } + + rxm = rxe->mbuf; + + if (!bulk_alloc) { + __le64 dma = + rte_cpu_to_le_64(rte_mbuf_data_iova_default(nmb)); + /* + * Update Rx descriptor with the physical address of the + * new data buffer of the new allocated mbuf. + */ + rxe->mbuf = nmb; + + rxm->data_off = RTE_PKTMBUF_HEADROOM; + NGBE_RXD_HDRADDR(rxdp, 0); + NGBE_RXD_PKTADDR(rxdp, dma); + } else { + rxe->mbuf = NULL; + } + + /* + * Set data length & data buffer address of mbuf. + */ + data_len = rte_le_to_cpu_16(rxd.qw1.hi.len); + rxm->data_len = data_len; + + if (!eop) { + uint16_t nextp_id; + + nextp_id = next_id; + next_sc_entry = &sw_sc_ring[nextp_id]; + next_rxe = &sw_ring[nextp_id]; + rte_ngbe_prefetch(next_rxe); + } + + sc_entry = &sw_sc_ring[rx_id]; + first_seg = sc_entry->fbuf; + sc_entry->fbuf = NULL; + + /* + * If this is the first buffer of the received packet, + * set the pointer to the first mbuf of the packet and + * initialize its context. + * Otherwise, update the total length and the number of segments + * of the current scattered packet, and update the pointer to + * the last mbuf of the current packet. + */ + if (first_seg == NULL) { + first_seg = rxm; + first_seg->pkt_len = data_len; + first_seg->nb_segs = 1; + } else { + first_seg->pkt_len += data_len; + first_seg->nb_segs++; + } + + prev_id = rx_id; + rx_id = next_id; + + /* + * If this is not the last buffer of the received packet, update + * the pointer to the first mbuf at the NEXTP entry in the + * sw_sc_ring and continue to parse the Rx ring. + */ + if (!eop && next_rxe) { + rxm->next = next_rxe->mbuf; + next_sc_entry->fbuf = first_seg; + goto next_desc; + } + + /* Initialize the first mbuf of the returned packet */ + ngbe_fill_cluster_head_buf(first_seg, &rxd, rxq, staterr); + + /* Prefetch data of first segment, if configured to do so. */ + rte_packet_prefetch((char *)first_seg->buf_addr + + first_seg->data_off); + + /* + * Store the mbuf address into the next entry of the array + * of returned packets. + */ + rx_pkts[nb_rx++] = first_seg; + } + + /* + * Record index of the next Rx descriptor to probe. + */ + rxq->rx_tail = rx_id; + + /* + * If the number of free Rx descriptors is greater than the Rx free + * threshold of the queue, advance the Receive Descriptor Tail (RDT) + * register. + * Update the RDT with the value of the last processed Rx descriptor + * minus 1, to guarantee that the RDT register is never equal to the + * RDH register, which creates a "full" ring situation from the + * hardware point of view... + */ + if (!bulk_alloc && nb_hold > rxq->rx_free_thresh) { + PMD_RX_LOG(DEBUG, "port_id=%u queue_id=%u rx_tail=%u " + "nb_hold=%u nb_rx=%u", + rxq->port_id, rxq->queue_id, rx_id, nb_hold, nb_rx); + + rte_wmb(); + ngbe_set32_relaxed(rxq->rdt_reg_addr, prev_id); + nb_hold = 0; + } + + rxq->nb_rx_hold = nb_hold; + return nb_rx; +} + +uint16_t +ngbe_recv_pkts_sc_single_alloc(void *rx_queue, struct rte_mbuf **rx_pkts, + uint16_t nb_pkts) +{ + return ngbe_recv_pkts_sc(rx_queue, rx_pkts, nb_pkts, false); +} + +uint16_t +ngbe_recv_pkts_sc_bulk_alloc(void *rx_queue, struct rte_mbuf **rx_pkts, + uint16_t nb_pkts) +{ + return ngbe_recv_pkts_sc(rx_queue, rx_pkts, nb_pkts, true); +} /********************************************************************* * @@ -777,6 +1254,12 @@ ngbe_reset_rx_queue(struct ngbe_adapter *adapter, struct ngbe_rx_queue *rxq) rxq->pkt_last_seg = NULL; } +uint64_t +ngbe_get_rx_port_offloads(struct rte_eth_dev *dev __rte_unused) +{ + return DEV_RX_OFFLOAD_SCATTER; +} + int ngbe_dev_rx_queue_setup(struct rte_eth_dev *dev, uint16_t queue_idx, @@ -977,6 +1460,54 @@ ngbe_alloc_rx_queue_mbufs(struct ngbe_rx_queue *rxq) return 0; } +void +ngbe_set_rx_function(struct rte_eth_dev *dev) +{ + struct ngbe_adapter *adapter = ngbe_dev_adapter(dev); + + if (dev->data->scattered_rx) { + /* + * Set the scattered callback: there are bulk and + * single allocation versions. + */ + if (adapter->rx_bulk_alloc_allowed) { + PMD_INIT_LOG(DEBUG, "Using a Scattered with bulk " + "allocation callback (port=%d).", + dev->data->port_id); + dev->rx_pkt_burst = ngbe_recv_pkts_sc_bulk_alloc; + } else { + PMD_INIT_LOG(DEBUG, "Using Regular (non-vector, " + "single allocation) " + "Scattered Rx callback " + "(port=%d).", + dev->data->port_id); + + dev->rx_pkt_burst = ngbe_recv_pkts_sc_single_alloc; + } + /* + * Below we set "simple" callbacks according to port/queues parameters. + * If parameters allow we are going to choose between the following + * callbacks: + * - Bulk Allocation + * - Single buffer allocation (the simplest one) + */ + } else if (adapter->rx_bulk_alloc_allowed) { + PMD_INIT_LOG(DEBUG, "Rx Burst Bulk Alloc Preconditions are " + "satisfied. Rx Burst Bulk Alloc function " + "will be used on port=%d.", + dev->data->port_id); + + dev->rx_pkt_burst = ngbe_recv_pkts_bulk_alloc; + } else { + PMD_INIT_LOG(DEBUG, "Rx Burst Bulk Alloc Preconditions are not " + "satisfied, or Scattered Rx is requested " + "(port=%d).", + dev->data->port_id); + + dev->rx_pkt_burst = ngbe_recv_pkts; + } +} + /* * Initializes Receive Unit. */ @@ -991,6 +1522,7 @@ ngbe_dev_rx_init(struct rte_eth_dev *dev) uint32_t srrctl; uint16_t buf_size; uint16_t i; + struct rte_eth_rxmode *rx_conf = &dev->data->dev_conf.rxmode; PMD_INIT_FUNC_TRACE(); hw = ngbe_dev_hw(dev); @@ -1047,6 +1579,11 @@ ngbe_dev_rx_init(struct rte_eth_dev *dev) wr32(hw, NGBE_RXCFG(rxq->reg_idx), srrctl); } + if (rx_conf->offloads & DEV_RX_OFFLOAD_SCATTER) + dev->data->scattered_rx = 1; + + ngbe_set_rx_function(dev); + return 0; } diff --git a/drivers/net/ngbe/ngbe_rxtx.h b/drivers/net/ngbe/ngbe_rxtx.h index a89d59e06b..e59e6c461d 100644 --- a/drivers/net/ngbe/ngbe_rxtx.h +++ b/drivers/net/ngbe/ngbe_rxtx.h @@ -306,4 +306,8 @@ struct ngbe_txq_ops { void (*reset)(struct ngbe_tx_queue *txq); }; +void ngbe_set_rx_function(struct rte_eth_dev *dev); + +uint64_t ngbe_get_rx_port_offloads(struct rte_eth_dev *dev); + #endif /* _NGBE_RXTX_H_ */