From patchwork Mon Dec 7 16:32:31 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lorenzo Bianconi X-Patchwork-Id: 11956337 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.0 required=3.0 tests=BAYES_00,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5B530C1B0E3 for ; Mon, 7 Dec 2020 16:33:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 34FF523998 for ; Mon, 7 Dec 2020 16:33:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727050AbgLGQdp (ORCPT ); Mon, 7 Dec 2020 11:33:45 -0500 Received: from mail.kernel.org ([198.145.29.99]:60656 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726249AbgLGQdo (ORCPT ); Mon, 7 Dec 2020 11:33:44 -0500 From: Lorenzo Bianconi Authentication-Results: mail.kernel.org; dkim=permerror (bad message/signature format) To: bpf@vger.kernel.org, netdev@vger.kernel.org Cc: davem@davemloft.net, kuba@kernel.org, ast@kernel.org, daniel@iogearbox.net, shayagr@amazon.com, sameehj@amazon.com, john.fastabend@gmail.com, dsahern@kernel.org, brouer@redhat.com, echaudro@redhat.com, lorenzo.bianconi@redhat.com, jasowang@redhat.com Subject: [PATCH v5 bpf-next 02/14] xdp: initialize xdp_buff mb bit to 0 in all XDP drivers Date: Mon, 7 Dec 2020 17:32:31 +0100 Message-Id: <693d48b46dd5172763952acd94358cc5d02dcda3.1607349924.git.lorenzo@kernel.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net Initialize multi-buffer bit (mb) to 0 in all XDP-capable drivers. This is a preliminary patch to enable xdp multi-buffer support. Signed-off-by: Lorenzo Bianconi --- drivers/net/ethernet/amazon/ena/ena_netdev.c | 1 + drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c | 1 + drivers/net/ethernet/cavium/thunder/nicvf_main.c | 1 + drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c | 1 + drivers/net/ethernet/intel/i40e/i40e_txrx.c | 1 + drivers/net/ethernet/intel/ice/ice_txrx.c | 1 + drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 1 + drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c | 1 + drivers/net/ethernet/marvell/mvneta.c | 1 + drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 1 + drivers/net/ethernet/mellanox/mlx4/en_rx.c | 1 + drivers/net/ethernet/mellanox/mlx5/core/en_rx.c | 1 + drivers/net/ethernet/netronome/nfp/nfp_net_common.c | 1 + drivers/net/ethernet/qlogic/qede/qede_fp.c | 1 + drivers/net/ethernet/sfc/rx.c | 1 + drivers/net/ethernet/socionext/netsec.c | 1 + drivers/net/ethernet/ti/cpsw.c | 1 + drivers/net/ethernet/ti/cpsw_new.c | 1 + drivers/net/hyperv/netvsc_bpf.c | 1 + drivers/net/tun.c | 2 ++ drivers/net/veth.c | 1 + drivers/net/virtio_net.c | 2 ++ drivers/net/xen-netfront.c | 1 + net/core/dev.c | 1 + 24 files changed, 26 insertions(+) diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c index 0e98f45c2b22..abe826395e2f 100644 --- a/drivers/net/ethernet/amazon/ena/ena_netdev.c +++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c @@ -1569,6 +1569,7 @@ static int ena_clean_rx_irq(struct ena_ring *rx_ring, struct napi_struct *napi, res_budget = budget; xdp.rxq = &rx_ring->xdp_rxq; xdp.frame_sz = ENA_PAGE_SIZE; + xdp.mb = 0; do { xdp_verdict = XDP_PASS; diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c index fcc262064766..344644b6dd4d 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c @@ -139,6 +139,7 @@ bool bnxt_rx_xdp(struct bnxt *bp, struct bnxt_rx_ring_info *rxr, u16 cons, xdp.data_end = *data_ptr + *len; xdp.rxq = &rxr->xdp_rxq; xdp.frame_sz = PAGE_SIZE; /* BNXT_RX_PAGE_MODE(bp) when XDP enabled */ + xdp.mb = 0; orig_data = xdp.data; rcu_read_lock(); diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_main.c b/drivers/net/ethernet/cavium/thunder/nicvf_main.c index f3b7b443f964..4e790a50d14c 100644 --- a/drivers/net/ethernet/cavium/thunder/nicvf_main.c +++ b/drivers/net/ethernet/cavium/thunder/nicvf_main.c @@ -553,6 +553,7 @@ static inline bool nicvf_xdp_rx(struct nicvf *nic, struct bpf_prog *prog, xdp.data_end = xdp.data + len; xdp.rxq = &rq->xdp_rxq; xdp.frame_sz = RCV_FRAG_LEN + XDP_PACKET_HEADROOM; + xdp.mb = 0; orig_data = xdp.data; rcu_read_lock(); diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c index 91cff93dbdae..fe70be3ca399 100644 --- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c +++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c @@ -366,6 +366,7 @@ static u32 dpaa2_eth_run_xdp(struct dpaa2_eth_priv *priv, xdp.frame_sz = DPAA2_ETH_RX_BUF_RAW_SIZE - (dpaa2_fd_get_offset(fd) - XDP_PACKET_HEADROOM); + xdp.mb = 0; xdp_act = bpf_prog_run_xdp(xdp_prog, &xdp); diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c index 9f73cd7aee09..1c8acebfde3d 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c +++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c @@ -2343,6 +2343,7 @@ static int i40e_clean_rx_irq(struct i40e_ring *rx_ring, int budget) xdp.frame_sz = i40e_rx_frame_truesize(rx_ring, 0); #endif xdp.rxq = &rx_ring->xdp_rxq; + xdp.mb = 0; while (likely(total_rx_packets < (unsigned int)budget)) { struct i40e_rx_buffer *rx_buffer; diff --git a/drivers/net/ethernet/intel/ice/ice_txrx.c b/drivers/net/ethernet/intel/ice/ice_txrx.c index 77d5eae6b4c2..0f8a996e298b 100644 --- a/drivers/net/ethernet/intel/ice/ice_txrx.c +++ b/drivers/net/ethernet/intel/ice/ice_txrx.c @@ -1089,6 +1089,7 @@ int ice_clean_rx_irq(struct ice_ring *rx_ring, int budget) #if (PAGE_SIZE < 8192) xdp.frame_sz = ice_rx_frame_truesize(rx_ring, 0); #endif + xdp.mb = 0; /* start the loop to process Rx packets bounded by 'budget' */ while (likely(total_rx_pkts < (unsigned int)budget)) { diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c index 50e6b8b6ba7b..2e028b306677 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c @@ -2298,6 +2298,7 @@ static int ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector, #if (PAGE_SIZE < 8192) xdp.frame_sz = ixgbe_rx_frame_truesize(rx_ring, 0); #endif + xdp.mb = 0; while (likely(total_rx_packets < budget)) { union ixgbe_adv_rx_desc *rx_desc; diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c index 4061cd7db5dd..037bfb2aadac 100644 --- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c +++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c @@ -1129,6 +1129,7 @@ static int ixgbevf_clean_rx_irq(struct ixgbevf_q_vector *q_vector, struct xdp_buff xdp; xdp.rxq = &rx_ring->xdp_rxq; + xdp.mb = 0; /* Frame size depend on rx_ring setup when PAGE_SIZE=4K */ #if (PAGE_SIZE < 8192) diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c index 563ceac3060f..1e5b5c69685a 100644 --- a/drivers/net/ethernet/marvell/mvneta.c +++ b/drivers/net/ethernet/marvell/mvneta.c @@ -2366,6 +2366,7 @@ static int mvneta_rx_swbm(struct napi_struct *napi, xdp_buf.data_hard_start = NULL; xdp_buf.frame_sz = PAGE_SIZE; xdp_buf.rxq = &rxq->xdp_rxq; + xdp_buf.mb = 0; sinfo.nr_frags = 0; diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c index afdd22827223..32b48de36841 100644 --- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c +++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c @@ -3566,6 +3566,7 @@ static int mvpp2_rx(struct mvpp2_port *port, struct napi_struct *napi, xdp.data = data + MVPP2_MH_SIZE + MVPP2_SKB_HEADROOM; xdp.data_end = xdp.data + rx_bytes; xdp.frame_sz = PAGE_SIZE; + xdp.mb = 0; if (bm_pool->pkt_size == MVPP2_BM_SHORT_PKT_SIZE) xdp.rxq = &rxq->xdp_rxq_short; diff --git a/drivers/net/ethernet/mellanox/mlx4/en_rx.c b/drivers/net/ethernet/mellanox/mlx4/en_rx.c index 7954c1daf2b6..547ff84bb71a 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_rx.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_rx.c @@ -684,6 +684,7 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud xdp_prog = rcu_dereference(ring->xdp_prog); xdp.rxq = &ring->xdp_rxq; xdp.frame_sz = priv->frag_info[0].frag_stride; + xdp.mb = 0; doorbell_pending = false; /* We assume a 1:1 mapping between CQEs and Rx descriptors, so Rx diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c index 6628a0197b4e..50fd12ba3a0f 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c @@ -1133,6 +1133,7 @@ static void mlx5e_fill_xdp_buff(struct mlx5e_rq *rq, void *va, u16 headroom, xdp->data_end = xdp->data + len; xdp->rxq = &rq->xdp_rxq; xdp->frame_sz = rq->buff.frame0_sz; + xdp->mb = 0; } static struct sk_buff * diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c index b4acf2f41e84..4e762bbf283c 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c @@ -1824,6 +1824,7 @@ static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget) true_bufsz = xdp_prog ? PAGE_SIZE : dp->fl_bufsz; xdp.frame_sz = PAGE_SIZE - NFP_NET_RX_BUF_HEADROOM; xdp.rxq = &rx_ring->xdp_rxq; + xdp.mb = 0; tx_ring = r_vec->xdp_ring; while (pkts_polled < budget) { diff --git a/drivers/net/ethernet/qlogic/qede/qede_fp.c b/drivers/net/ethernet/qlogic/qede/qede_fp.c index a2494bf85007..14a54094ca08 100644 --- a/drivers/net/ethernet/qlogic/qede/qede_fp.c +++ b/drivers/net/ethernet/qlogic/qede/qede_fp.c @@ -1096,6 +1096,7 @@ static bool qede_rx_xdp(struct qede_dev *edev, xdp.data_end = xdp.data + *len; xdp.rxq = &rxq->xdp_rxq; xdp.frame_sz = rxq->rx_buf_seg_size; /* PAGE_SIZE when XDP enabled */ + xdp.mb = 0; /* Queues always have a full reset currently, so for the time * being until there's atomic program replace just mark read diff --git a/drivers/net/ethernet/sfc/rx.c b/drivers/net/ethernet/sfc/rx.c index aaa112877561..286feb510c21 100644 --- a/drivers/net/ethernet/sfc/rx.c +++ b/drivers/net/ethernet/sfc/rx.c @@ -301,6 +301,7 @@ static bool efx_do_xdp(struct efx_nic *efx, struct efx_channel *channel, xdp.data_end = xdp.data + rx_buf->len; xdp.rxq = &rx_queue->xdp_rxq_info; xdp.frame_sz = efx->rx_page_buf_step; + xdp.mb = 0; xdp_act = bpf_prog_run_xdp(xdp_prog, &xdp); rcu_read_unlock(); diff --git a/drivers/net/ethernet/socionext/netsec.c b/drivers/net/ethernet/socionext/netsec.c index 19d20a6d0d44..8853db2575f0 100644 --- a/drivers/net/ethernet/socionext/netsec.c +++ b/drivers/net/ethernet/socionext/netsec.c @@ -958,6 +958,7 @@ static int netsec_process_rx(struct netsec_priv *priv, int budget) xdp.rxq = &dring->xdp_rxq; xdp.frame_sz = PAGE_SIZE; + xdp.mb = 0; rcu_read_lock(); xdp_prog = READ_ONCE(priv->xdp_prog); diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c index b0f00b4edd94..6e3fa1994bd5 100644 --- a/drivers/net/ethernet/ti/cpsw.c +++ b/drivers/net/ethernet/ti/cpsw.c @@ -407,6 +407,7 @@ static void cpsw_rx_handler(void *token, int len, int status) xdp.data_hard_start = pa; xdp.rxq = &priv->xdp_rxq[ch]; xdp.frame_sz = PAGE_SIZE; + xdp.mb = 0; port = priv->emac_port + cpsw->data.dual_emac; ret = cpsw_run_xdp(priv, ch, &xdp, page, port); diff --git a/drivers/net/ethernet/ti/cpsw_new.c b/drivers/net/ethernet/ti/cpsw_new.c index 2f5e0ad23ad7..a13535fefbeb 100644 --- a/drivers/net/ethernet/ti/cpsw_new.c +++ b/drivers/net/ethernet/ti/cpsw_new.c @@ -350,6 +350,7 @@ static void cpsw_rx_handler(void *token, int len, int status) xdp.data_hard_start = pa; xdp.rxq = &priv->xdp_rxq[ch]; xdp.frame_sz = PAGE_SIZE; + xdp.mb = 0; ret = cpsw_run_xdp(priv, ch, &xdp, page, priv->emac_port); if (ret != CPSW_XDP_PASS) diff --git a/drivers/net/hyperv/netvsc_bpf.c b/drivers/net/hyperv/netvsc_bpf.c index 440486d9c999..a4bafc64997f 100644 --- a/drivers/net/hyperv/netvsc_bpf.c +++ b/drivers/net/hyperv/netvsc_bpf.c @@ -50,6 +50,7 @@ u32 netvsc_run_xdp(struct net_device *ndev, struct netvsc_channel *nvchan, xdp->data_end = xdp->data + len; xdp->rxq = &nvchan->xdp_rxq; xdp->frame_sz = PAGE_SIZE; + xdp->mb = 0; memcpy(xdp->data, data, len); diff --git a/drivers/net/tun.c b/drivers/net/tun.c index fbed05ae7b0f..8c100f4b2001 100644 --- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -1605,6 +1605,7 @@ static struct sk_buff *tun_build_skb(struct tun_struct *tun, xdp.data_end = xdp.data + len; xdp.rxq = &tfile->xdp_rxq; xdp.frame_sz = buflen; + xdp.mb = 0; act = bpf_prog_run_xdp(xdp_prog, &xdp); if (act == XDP_REDIRECT || act == XDP_TX) { @@ -2347,6 +2348,7 @@ static int tun_xdp_one(struct tun_struct *tun, xdp_set_data_meta_invalid(xdp); xdp->rxq = &tfile->xdp_rxq; xdp->frame_sz = buflen; + xdp->mb = 0; act = bpf_prog_run_xdp(xdp_prog, xdp); err = tun_xdp_act(tun, xdp_prog, xdp, act); diff --git a/drivers/net/veth.c b/drivers/net/veth.c index 02bfcdf50a7a..52e050228a42 100644 --- a/drivers/net/veth.c +++ b/drivers/net/veth.c @@ -719,6 +719,7 @@ static struct sk_buff *veth_xdp_rcv_skb(struct veth_rq *rq, /* SKB "head" area always have tailroom for skb_shared_info */ xdp.frame_sz = (void *)skb_end_pointer(skb) - xdp.data_hard_start; xdp.frame_sz += SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); + xdp.mb = 0; orig_data = xdp.data; orig_data_end = xdp.data_end; diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 052975ea0af4..4c15e30d7ef1 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -695,6 +695,7 @@ static struct sk_buff *receive_small(struct net_device *dev, xdp.data_meta = xdp.data; xdp.rxq = &rq->xdp_rxq; xdp.frame_sz = buflen; + xdp.mb = 0; orig_data = xdp.data; act = bpf_prog_run_xdp(xdp_prog, &xdp); stats->xdp_packets++; @@ -865,6 +866,7 @@ static struct sk_buff *receive_mergeable(struct net_device *dev, xdp.data_meta = xdp.data; xdp.rxq = &rq->xdp_rxq; xdp.frame_sz = frame_sz - vi->hdr_len; + xdp.mb = 0; act = bpf_prog_run_xdp(xdp_prog, &xdp); stats->xdp_packets++; diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c index b01848ef4649..34a254eab58b 100644 --- a/drivers/net/xen-netfront.c +++ b/drivers/net/xen-netfront.c @@ -870,6 +870,7 @@ static u32 xennet_run_xdp(struct netfront_queue *queue, struct page *pdata, xdp->data_end = xdp->data + len; xdp->rxq = &queue->xdp_rxq; xdp->frame_sz = XEN_PAGE_SIZE - XDP_PACKET_HEADROOM; + xdp->mb = 0; act = bpf_prog_run_xdp(prog, xdp); switch (act) { diff --git a/net/core/dev.c b/net/core/dev.c index ce8fea2e2788..7f0b2b25860a 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -4633,6 +4633,7 @@ static u32 netif_receive_generic_xdp(struct sk_buff *skb, /* SKB "head" area always have tailroom for skb_shared_info */ xdp->frame_sz = (void *)skb_end_pointer(skb) - xdp->data_hard_start; xdp->frame_sz += SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); + xdp->mb = 0; orig_data_end = xdp->data_end; orig_data = xdp->data;