From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by dpdk.org (Postfix) with ESMTP id 74D871B142 for ; Wed, 3 Oct 2018 15:12:16 +0200 (CEST) Received: from smtp.corp.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.24]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id D0016300207D; Wed, 3 Oct 2018 13:12:15 +0000 (UTC) Received: from localhost (ovpn-117-1.ams2.redhat.com [10.36.117.1]) by smtp.corp.redhat.com (Postfix) with ESMTPS id C8FEB308BDA0; Wed, 3 Oct 2018 13:12:09 +0000 (UTC) From: Jens Freimann To: dev@dpdk.org Cc: tiwei.bie@intel.com, maxime.coquelin@redhat.com, Gavin.Hu@arm.com Date: Wed, 3 Oct 2018 15:11:16 +0200 Message-Id: <20181003131118.21491-7-jfreimann@redhat.com> In-Reply-To: <20181003131118.21491-1-jfreimann@redhat.com> References: <20181003131118.21491-1-jfreimann@redhat.com> X-Scanned-By: MIMEDefang 2.84 on 10.5.11.24 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.47]); Wed, 03 Oct 2018 13:12:15 +0000 (UTC) Subject: [dpdk-dev] [PATCH v7 6/8] net/virtio: implement receive path for packed queues X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 03 Oct 2018 13:12:16 -0000 Implement the receive part. Signed-off-by: Jens Freimann --- drivers/net/virtio/virtio_ethdev.c | 15 +- drivers/net/virtio/virtio_ethdev.h | 2 + drivers/net/virtio/virtio_rxtx.c | 268 +++++++++++++++++++++++++++-- drivers/net/virtio/virtqueue.c | 23 +++ drivers/net/virtio/virtqueue.h | 1 + 5 files changed, 292 insertions(+), 17 deletions(-) diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c index c65ac365c..72bef1a44 100644 --- a/drivers/net/virtio/virtio_ethdev.c +++ b/drivers/net/virtio/virtio_ethdev.c @@ -390,8 +390,10 @@ virtio_init_queue(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx) vq->hw = hw; vq->vq_queue_index = vtpci_queue_idx; vq->vq_nentries = vq_size; - if (vtpci_packed_queue(hw)) + if (vtpci_packed_queue(hw)) { vq->vq_ring.avail_wrap_counter = 1; + vq->vq_ring.used_wrap_counter = 1; + } /* * Reserve a memzone for vring elements @@ -1332,7 +1334,13 @@ set_rxtx_funcs(struct rte_eth_dev *eth_dev) { struct virtio_hw *hw = eth_dev->data->dev_private; - if (hw->use_simple_rx) { + if (vtpci_packed_queue(hw)) { + if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) { + eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts; + } else { + eth_dev->rx_pkt_burst = &virtio_recv_pkts_packed; + } + } else if (hw->use_simple_rx) { PMD_INIT_LOG(INFO, "virtio: using simple Rx path on port %u", eth_dev->data->port_id); eth_dev->rx_pkt_burst = virtio_recv_pkts_vec; @@ -1496,7 +1504,8 @@ virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features) /* Setting up rx_header size for the device */ if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) || - vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) + vtpci_with_feature(hw, VIRTIO_F_VERSION_1) || + vtpci_with_feature(hw, VIRTIO_F_RING_PACKED)) hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf); else hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr); diff --git a/drivers/net/virtio/virtio_ethdev.h b/drivers/net/virtio/virtio_ethdev.h index 05d355180..6c9247639 100644 --- a/drivers/net/virtio/virtio_ethdev.h +++ b/drivers/net/virtio/virtio_ethdev.h @@ -73,6 +73,8 @@ int virtio_dev_tx_queue_setup_finish(struct rte_eth_dev *dev, uint16_t virtio_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts); +uint16_t virtio_recv_pkts_packed(void *rx_queue, struct rte_mbuf **rx_pkts, + uint16_t nb_pkts); uint16_t virtio_recv_mergeable_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts); diff --git a/drivers/net/virtio/virtio_rxtx.c b/drivers/net/virtio/virtio_rxtx.c index 4078fba8e..610a3962e 100644 --- a/drivers/net/virtio/virtio_rxtx.c +++ b/drivers/net/virtio/virtio_rxtx.c @@ -31,6 +31,7 @@ #include "virtqueue.h" #include "virtio_rxtx.h" #include "virtio_rxtx_simple.h" +#include "virtio_ring.h" #ifdef RTE_LIBRTE_VIRTIO_DEBUG_DUMP #define VIRTIO_DUMP_PACKET(m, len) rte_pktmbuf_dump(stdout, m, len) @@ -124,6 +125,47 @@ vq_ring_free_chain_packed(struct virtqueue *vq, uint16_t desc_idx) dxp->next = VQ_RING_DESC_CHAIN_END; } +static uint16_t +virtqueue_dequeue_burst_rx_packed(struct virtqueue *vq, + struct rte_mbuf **rx_pkts, + uint32_t *len, + uint16_t num) +{ + struct rte_mbuf *cookie; + uint16_t used_idx; + uint16_t id; + struct vring_desc_packed *desc; + uint16_t i; + + for (i = 0; i < num; i++) { + used_idx = vq->vq_used_cons_idx; + desc = (struct vring_desc_packed *) vq->vq_ring.desc_packed; + if (!desc_is_used(&desc[used_idx], &vq->vq_ring)) + return i; + len[i] = desc[used_idx].len; + id = desc[used_idx].index; + cookie = (struct rte_mbuf *)vq->vq_descx[id].cookie; + + if (unlikely(cookie == NULL)) { + PMD_DRV_LOG(ERR, "vring descriptor with no mbuf cookie at %u", + vq->vq_used_cons_idx); + break; + } + rte_prefetch0(cookie); + rte_packet_prefetch(rte_pktmbuf_mtod(cookie, void *)); + rx_pkts[i] = cookie; + vq_ring_free_chain_packed(vq, id); + + + if (++vq->vq_used_cons_idx >= vq->vq_nentries) { + vq->vq_used_cons_idx = 0; + vq->vq_ring.used_wrap_counter ^= 1; + } + } + + return i; +} + static uint16_t virtqueue_dequeue_burst_rx(struct virtqueue *vq, struct rte_mbuf **rx_pkts, uint32_t *len, uint16_t num) @@ -369,6 +411,51 @@ virtqueue_enqueue_recv_refill(struct virtqueue *vq, struct rte_mbuf *cookie) return 0; } +static inline int +virtqueue_enqueue_recv_refill_packed(struct virtqueue *vq, struct rte_mbuf *cookie) +{ + struct vq_desc_extra *dxp; + struct virtio_hw *hw = vq->hw; + struct vring_desc_packed *start_dp; + uint16_t needed = 1; + uint16_t head_idx, idx; + + if (unlikely(vq->vq_free_cnt == 0)) + return -ENOSPC; + if (unlikely(vq->vq_free_cnt < needed)) + return -EMSGSIZE; + + head_idx = vq->vq_desc_head_idx; + if (unlikely(head_idx >= vq->vq_nentries)) + return -EFAULT; + + idx = head_idx; + dxp = &vq->vq_descx[idx]; + dxp->cookie = (void *)cookie; + dxp->ndescs = needed; + + start_dp = vq->vq_ring.desc_packed; + start_dp[idx].addr = + VIRTIO_MBUF_ADDR(cookie, vq) + + RTE_PKTMBUF_HEADROOM - hw->vtnet_hdr_size; + start_dp[idx].len = + cookie->buf_len - RTE_PKTMBUF_HEADROOM + hw->vtnet_hdr_size; + start_dp[idx].flags = VRING_DESC_F_WRITE; + idx = dxp->next; + vq->vq_desc_head_idx = idx; + if (vq->vq_desc_head_idx == VQ_RING_DESC_CHAIN_END) + vq->vq_desc_tail_idx = idx; + vq->vq_free_cnt = (uint16_t)(vq->vq_free_cnt - needed); + + set_desc_avail(&vq->vq_ring, &vq->vq_ring.desc_packed[head_idx]); + if (++vq->vq_avail_idx >= vq->vq_nentries) { + vq->vq_avail_idx -= vq->vq_nentries; + vq->vq_ring.avail_wrap_counter ^= 1; + } + rte_smp_wmb(); + + return 0; +} /* When doing TSO, the IP length is not included in the pseudo header * checksum of the packet given to the PMD, but for virtio it is * expected. @@ -789,6 +876,29 @@ virtio_dev_rx_queue_setup_finish(struct rte_eth_dev *dev, uint16_t queue_idx) PMD_INIT_FUNC_TRACE(); + if (vtpci_packed_queue(hw)) { + struct vring_desc_packed *desc; + struct vq_desc_extra *dxp; + + for (desc_idx = 0; desc_idx < vq->vq_nentries; + desc_idx++) { + m = rte_mbuf_raw_alloc(rxvq->mpool); + if (unlikely(m == NULL)) + return -ENOMEM; + + dxp = &vq->vq_descx[desc_idx]; + dxp->cookie = m; + dxp->ndescs = 1; + + desc = &vq->vq_ring.desc_packed[desc_idx]; + desc->addr = VIRTIO_MBUF_ADDR(m, vq) + + RTE_PKTMBUF_HEADROOM - hw->vtnet_hdr_size; + desc->len = m->buf_len - RTE_PKTMBUF_HEADROOM + + hw->vtnet_hdr_size; + desc->flags = VRING_DESC_F_WRITE; + } + } + /* Allocate blank mbufs for the each rx descriptor */ nbufs = 0; @@ -841,7 +951,10 @@ virtio_dev_rx_queue_setup_finish(struct rte_eth_dev *dev, uint16_t queue_idx) break; /* Enqueue allocated buffers */ - error = virtqueue_enqueue_recv_refill(vq, m); + if (vtpci_packed_queue(vq->hw)) + error = virtqueue_enqueue_recv_refill_packed(vq, m); + else + error = virtqueue_enqueue_recv_refill(vq, m); if (error) { rte_pktmbuf_free(m); break; @@ -849,7 +962,8 @@ virtio_dev_rx_queue_setup_finish(struct rte_eth_dev *dev, uint16_t queue_idx) nbufs++; } - vq_update_avail_idx(vq); + if (!vtpci_packed_queue(vq->hw)) + vq_update_avail_idx(vq); } PMD_INIT_LOG(DEBUG, "Allocated %d bufs", nbufs); @@ -1173,6 +1287,109 @@ virtio_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts) return nb_rx; } +uint16_t +virtio_recv_pkts_packed(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts) +{ + struct virtnet_rx *rxvq = rx_queue; + struct virtqueue *vq = rxvq->vq; + struct virtio_hw *hw = vq->hw; + struct rte_mbuf *rxm, *new_mbuf; + uint16_t nb_used, num, nb_rx; + uint32_t len[VIRTIO_MBUF_BURST_SZ]; + struct rte_mbuf *rcv_pkts[VIRTIO_MBUF_BURST_SZ]; + int error; + uint32_t i, nb_enqueued; + uint32_t hdr_size; + struct virtio_net_hdr *hdr; + + nb_rx = 0; + if (unlikely(hw->started == 0)) + return nb_rx; + + nb_used = VIRTIO_MBUF_BURST_SZ; + + virtio_rmb(); + + num = likely(nb_used <= nb_pkts) ? nb_used : nb_pkts; + if (unlikely(num > VIRTIO_MBUF_BURST_SZ)) + num = VIRTIO_MBUF_BURST_SZ; + if (likely(num > DESC_PER_CACHELINE)) + num = num - ((vq->vq_used_cons_idx + num) % DESC_PER_CACHELINE); + + num = virtqueue_dequeue_burst_rx_packed(vq, rcv_pkts, len, num); + PMD_RX_LOG(DEBUG, "used:%d dequeue:%d", nb_used, num); + + nb_enqueued = 0; + hdr_size = hw->vtnet_hdr_size; + + for (i = 0; i < num ; i++) { + rxm = rcv_pkts[i]; + + PMD_RX_LOG(DEBUG, "packet len:%d", len[i]); + + if (unlikely(len[i] < hdr_size + ETHER_HDR_LEN)) { + PMD_RX_LOG(ERR, "Packet drop"); + nb_enqueued++; + virtio_discard_rxbuf(vq, rxm); + rxvq->stats.errors++; + continue; + } + + rxm->port = rxvq->port_id; + rxm->data_off = RTE_PKTMBUF_HEADROOM; + rxm->ol_flags = 0; + rxm->vlan_tci = 0; + + rxm->pkt_len = (uint32_t)(len[i] - hdr_size); + rxm->data_len = (uint16_t)(len[i] - hdr_size); + + hdr = (struct virtio_net_hdr *)((char *)rxm->buf_addr + + RTE_PKTMBUF_HEADROOM - hdr_size); + + if (hw->vlan_strip) + rte_vlan_strip(rxm); + + if (hw->has_rx_offload && virtio_rx_offload(rxm, hdr) < 0) { + virtio_discard_rxbuf(vq, rxm); + rxvq->stats.errors++; + continue; + } + + virtio_rx_stats_updated(rxvq, rxm); + + rx_pkts[nb_rx++] = rxm; + } + + rxvq->stats.packets += nb_rx; + + /* Allocate new mbuf for the used descriptor */ + while (likely(!virtqueue_full(vq))) { + new_mbuf = rte_mbuf_raw_alloc(rxvq->mpool); + if (unlikely(new_mbuf == NULL)) { + struct rte_eth_dev *dev + = &rte_eth_devices[rxvq->port_id]; + dev->data->rx_mbuf_alloc_failed++; + break; + } + error = virtqueue_enqueue_recv_refill_packed(vq, new_mbuf); + if (unlikely(error)) { + rte_pktmbuf_free(new_mbuf); + break; + } + nb_enqueued++; + } + + if (likely(nb_enqueued)) { + if (unlikely(virtqueue_kick_prepare_packed(vq))) { + virtqueue_notify(vq); + PMD_RX_LOG(DEBUG, "Notified"); + } + } + + return nb_rx; +} + + uint16_t virtio_recv_mergeable_pkts_inorder(void *rx_queue, struct rte_mbuf **rx_pkts, @@ -1379,12 +1596,16 @@ virtio_recv_mergeable_pkts(void *rx_queue, uint16_t extra_idx; uint32_t seg_res; uint32_t hdr_size; + uint32_t rx_num = 0; nb_rx = 0; if (unlikely(hw->started == 0)) return nb_rx; - nb_used = VIRTQUEUE_NUSED(vq); + if (vtpci_packed_queue(vq->hw)) + nb_used = VIRTIO_MBUF_BURST_SZ; + else + nb_used = VIRTQUEUE_NUSED(vq); virtio_rmb(); @@ -1397,13 +1618,21 @@ virtio_recv_mergeable_pkts(void *rx_queue, seg_res = 0; hdr_size = hw->vtnet_hdr_size; + vq->vq_used_idx = vq->vq_used_cons_idx; + while (i < nb_used) { struct virtio_net_hdr_mrg_rxbuf *header; if (nb_rx == nb_pkts) break; - num = virtqueue_dequeue_burst_rx(vq, rcv_pkts, len, 1); + if (vtpci_packed_queue(vq->hw)) + num = virtqueue_dequeue_burst_rx_packed(vq, rcv_pkts, + len, 1); + else + num = virtqueue_dequeue_burst_rx(vq, rcv_pkts, len, 1); + if (num == 0) + return nb_rx; if (num != 1) continue; @@ -1455,12 +1684,14 @@ virtio_recv_mergeable_pkts(void *rx_queue, */ uint16_t rcv_cnt = RTE_MIN(seg_res, RTE_DIM(rcv_pkts)); - if (likely(VIRTQUEUE_NUSED(vq) >= rcv_cnt)) { - uint32_t rx_num = - virtqueue_dequeue_burst_rx(vq, - rcv_pkts, len, rcv_cnt); - i += rx_num; - rcv_cnt = rx_num; + if (vtpci_packed_queue(vq->hw)) { + if (likely(vq->vq_free_cnt >= rcv_cnt)) { + rx_num = virtqueue_dequeue_burst_rx_packed(vq, + rcv_pkts, len, rcv_cnt); + } + } else if (likely(VIRTQUEUE_NUSED(vq) >= rcv_cnt)) { + rx_num = virtqueue_dequeue_burst_rx(vq, + rcv_pkts, len, rcv_cnt); } else { PMD_RX_LOG(ERR, "No enough segments for packet."); @@ -1469,6 +1700,8 @@ virtio_recv_mergeable_pkts(void *rx_queue, rxvq->stats.errors++; break; } + i += rx_num; + rcv_cnt = rx_num; extra_idx = 0; @@ -1511,7 +1744,10 @@ virtio_recv_mergeable_pkts(void *rx_queue, dev->data->rx_mbuf_alloc_failed++; break; } - error = virtqueue_enqueue_recv_refill(vq, new_mbuf); + if (vtpci_packed_queue(vq->hw)) + error = virtqueue_enqueue_recv_refill_packed(vq, new_mbuf); + else + error = virtqueue_enqueue_recv_refill(vq, new_mbuf); if (unlikely(error)) { rte_pktmbuf_free(new_mbuf); break; @@ -1520,9 +1756,13 @@ virtio_recv_mergeable_pkts(void *rx_queue, } if (likely(nb_enqueued)) { - vq_update_avail_idx(vq); - - if (unlikely(virtqueue_kick_prepare(vq))) { + if (likely(!vtpci_packed_queue(vq->hw))) { + vq_update_avail_idx(vq); + if (unlikely(virtqueue_kick_prepare(vq))) { + virtqueue_notify(vq); + PMD_RX_LOG(DEBUG, "Notified"); + } + } else if (virtqueue_kick_prepare_packed(vq)) { virtqueue_notify(vq); PMD_RX_LOG(DEBUG, "Notified"); } diff --git a/drivers/net/virtio/virtqueue.c b/drivers/net/virtio/virtqueue.c index 56a77cc71..6b541d789 100644 --- a/drivers/net/virtio/virtqueue.c +++ b/drivers/net/virtio/virtqueue.c @@ -58,12 +58,35 @@ virtqueue_detach_unused(struct virtqueue *vq) void virtqueue_rxvq_flush(struct virtqueue *vq) { + struct vring_desc_packed *descs = vq->vq_ring.desc_packed; struct virtnet_rx *rxq = &vq->rxq; struct virtio_hw *hw = vq->hw; struct vring_used_elem *uep; struct vq_desc_extra *dxp; uint16_t used_idx, desc_idx; uint16_t nb_used, i; + uint16_t size = vq->vq_nentries; + + if (vtpci_packed_queue(vq->hw)) { + return; + i = vq->vq_used_cons_idx; + if (i > size) { + PMD_INIT_LOG(ERR, "vq_used_cons_idx out of range, %d", vq->vq_used_cons_idx); + return; + } + while (desc_is_used(&descs[i], &vq->vq_ring) && + i < size) { + dxp = &vq->vq_descx[descs[i].index]; + if (dxp->cookie != NULL) { + rte_pktmbuf_free(dxp->cookie); + dxp->cookie = NULL; + } + vq_ring_free_chain_packed(vq, i); + i = dxp->next; + vq->vq_used_cons_idx++; + } + return; + } nb_used = VIRTQUEUE_NUSED(vq); diff --git a/drivers/net/virtio/virtqueue.h b/drivers/net/virtio/virtqueue.h index 58f600648..064df94fb 100644 --- a/drivers/net/virtio/virtqueue.h +++ b/drivers/net/virtio/virtqueue.h @@ -172,6 +172,7 @@ struct virtqueue { * trails vq_ring.used->idx. */ uint16_t vq_used_cons_idx; + uint16_t vq_used_idx; uint16_t vq_nentries; /**< vring desc numbers */ uint16_t vq_free_cnt; /**< num of desc available */ uint16_t vq_avail_idx; /**< sync until needed */ -- 2.17.1