From patchwork Tue Jun 28 16:31:19 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jesper Dangaard Brouer X-Patchwork-Id: 12898561 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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D66AFC433EF for ; Tue, 28 Jun 2022 16:35:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232191AbiF1QfE (ORCPT ); Tue, 28 Jun 2022 12:35:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50598 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233327AbiF1Qea (ORCPT ); Tue, 28 Jun 2022 12:34:30 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 39DB32C120 for ; Tue, 28 Jun 2022 09:31:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1656433882; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=GVhjnFy1p4yXXxHSIbHIAdGS4VuHqSqKY57qMTPzco4=; b=dObPZMOLwOMAyFvkZPjiw1LOEyqX/hpRmiUImiDw+nMmEDxtuTW6IriTneWt5ECNgcARML LhYbCGqWPoDPVHtMFf2sNcA8UYlOjj15go3B01tavKLNTOUuO54ZuM+420Qy9sAwrj7afF YnE6aABr0WmQFE4nl/raBH5S1biuq/Q= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-607-sGnRsmI9PH2hbPVnVXIyeA-1; Tue, 28 Jun 2022 12:31:20 -0400 X-MC-Unique: sGnRsmI9PH2hbPVnVXIyeA-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 7D2CD38149B4; Tue, 28 Jun 2022 16:31:20 +0000 (UTC) Received: from firesoul.localdomain (unknown [10.40.208.19]) by smtp.corp.redhat.com (Postfix) with ESMTP id 19E9A1678F; Tue, 28 Jun 2022 16:31:20 +0000 (UTC) Received: from [192.168.42.3] (localhost [IPv6:::1]) by firesoul.localdomain (Postfix) with ESMTP id 1A7E630736C72; Tue, 28 Jun 2022 18:31:19 +0200 (CEST) Subject: [PATCH RFC bpf-next 9/9] mvneta: add XDP-hints support From: Jesper Dangaard Brouer To: bpf@vger.kernel.org Cc: xdp-hints@xdp-project.net, Jesper Dangaard Brouer Date: Tue, 28 Jun 2022 18:31:19 +0200 Message-ID: <165643387907.449467.15379243921107938760.stgit@firesoul> In-Reply-To: <165643378969.449467.13237011812569188299.stgit@firesoul> References: <165643378969.449467.13237011812569188299.stgit@firesoul> User-Agent: StGit/1.4 MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.11.54.5 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net X-Patchwork-State: RFC From: Lorenzo Bianconi Similar to i40e driver, add xdp hw-hints support for mvneta driver in order to report rx csum offload for xdp_redirect. Signed-off-by: Lorenzo Bianconi Signed-off-by: Jesper Dangaard Brouer --- drivers/net/ethernet/marvell/mvneta.c | 61 ++++++++++++++++++++++++++++----- 1 file changed, 52 insertions(+), 9 deletions(-) diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c index 384f5a16753d..4f73ba905741 100644 --- a/drivers/net/ethernet/marvell/mvneta.c +++ b/drivers/net/ethernet/marvell/mvneta.c @@ -40,6 +40,7 @@ #include #include #include +#include /* Registers */ #define MVNETA_RXQ_CONFIG_REG(q) (0x1400 + ((q) << 2)) @@ -371,6 +372,9 @@ #define MVNETA_RX_GET_BM_POOL_ID(rxd) \ (((rxd)->status & MVNETA_RXD_BM_POOL_MASK) >> MVNETA_RXD_BM_POOL_SHIFT) +static struct btf *mvneta_btf; +static s32 btf_id_xdp_hints; + enum { ETHTOOL_STAT_EEE_WAKEUP, ETHTOOL_STAT_SKB_ALLOC_ERR, @@ -2308,12 +2312,15 @@ mvneta_swbm_rx_frame(struct mvneta_port *pp, struct mvneta_rx_desc *rx_desc, struct mvneta_rx_queue *rxq, struct xdp_buff *xdp, int *size, - struct page *page) + struct page *page, u32 status) { unsigned char *data = page_address(page); int data_len = -MVNETA_MH_SIZE, len; + struct xdp_hints_common *xdp_hints; struct net_device *dev = pp->dev; enum dma_data_direction dma_dir; + u32 xdp_hints_flags; + u16 cksum; if (*size > MVNETA_MAX_RX_BUF_SIZE) { len = MVNETA_MAX_RX_BUF_SIZE; @@ -2336,6 +2343,18 @@ mvneta_swbm_rx_frame(struct mvneta_port *pp, xdp_buff_clear_frags_flag(xdp); xdp_prepare_buff(xdp, data, pp->rx_offset_correction + MVNETA_MH_SIZE, data_len, false); + + if (!(pp->dev->features & NETIF_F_XDP_HINTS)) + return; + + xdp_hints = xdp->data - sizeof(*xdp_hints); + cksum = mvneta_rx_csum(pp, status); + xdp_hints_flags = xdp_hints_set_rx_csum(xdp_hints, cksum, 0); + xdp_hints_set_flags(xdp_hints, xdp_hints_flags); + xdp_hints->btf_id = btf_id_xdp_hints; + xdp->data_meta = xdp->data - sizeof(*xdp_hints); + + xdp_buff_set_hints(xdp, BTF_ORIGIN_VMLINUX, true); } static void @@ -2385,9 +2404,24 @@ mvneta_swbm_add_rx_fragment(struct mvneta_port *pp, *size -= len; } +static void +mvneta_set_skb_cksum_from_xdp(struct xdp_buff *xdp, struct sk_buff *skb) +{ + struct xdp_hints_common *xdp_hints; + + if (!(xdp_buff_has_hints_compat(xdp))) + return; + + if (xdp->data - xdp->data_meta < sizeof(*xdp_hints)) + return; + + xdp_hints = xdp->data - sizeof(*xdp_hints); + skb->ip_summed = xdp_hints->xdp_hints_flags & HINT_FLAG_CSUM_TYPE_MASK; +} + static struct sk_buff * mvneta_swbm_build_skb(struct mvneta_port *pp, struct page_pool *pool, - struct xdp_buff *xdp, u32 desc_status) + struct xdp_buff *xdp) { struct skb_shared_info *sinfo = xdp_get_shared_info_from_buff(xdp); struct sk_buff *skb; @@ -2404,7 +2438,7 @@ mvneta_swbm_build_skb(struct mvneta_port *pp, struct page_pool *pool, skb_reserve(skb, xdp->data - xdp->data_hard_start); skb_put(skb, xdp->data_end - xdp->data); - skb->ip_summed = mvneta_rx_csum(pp, desc_status); + mvneta_set_skb_cksum_from_xdp(xdp, skb); if (unlikely(xdp_buff_has_frags(xdp))) xdp_update_skb_shared_info(skb, num_frags, @@ -2424,8 +2458,8 @@ static int mvneta_rx_swbm(struct napi_struct *napi, struct net_device *dev = pp->dev; struct mvneta_stats ps = {}; struct bpf_prog *xdp_prog; - u32 desc_status, frame_sz; struct xdp_buff xdp_buf; + u32 frame_sz; xdp_init_buff(&xdp_buf, PAGE_SIZE, &rxq->xdp_rxq); xdp_buf.data_hard_start = NULL; @@ -2458,10 +2492,8 @@ static int mvneta_rx_swbm(struct napi_struct *napi, size = rx_desc->data_size; frame_sz = size - ETH_FCS_LEN; - desc_status = rx_status; - mvneta_swbm_rx_frame(pp, rx_desc, rxq, &xdp_buf, - &size, page); + &size, page, rx_status); } else { if (unlikely(!xdp_buf.data_hard_start)) { rx_desc->buf_phys_addr = 0; @@ -2487,7 +2519,7 @@ static int mvneta_rx_swbm(struct napi_struct *napi, mvneta_run_xdp(pp, rxq, xdp_prog, &xdp_buf, frame_sz, &ps)) goto next; - skb = mvneta_swbm_build_skb(pp, rxq->page_pool, &xdp_buf, desc_status); + skb = mvneta_swbm_build_skb(pp, rxq->page_pool, &xdp_buf); if (IS_ERR(skb)) { struct mvneta_pcpu_stats *stats = this_cpu_ptr(pp->stats); @@ -5613,7 +5645,7 @@ static int mvneta_probe(struct platform_device *pdev) } dev->features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | - NETIF_F_TSO | NETIF_F_RXCSUM; + NETIF_F_TSO | NETIF_F_RXCSUM | NETIF_F_XDP_HINTS; dev->hw_features |= dev->features; dev->vlan_features |= dev->features; dev->priv_flags |= IFF_LIVE_ADDR_CHANGE; @@ -5817,6 +5849,16 @@ static int __init mvneta_driver_init(void) { int ret; + mvneta_btf = btf_get_module_btf(THIS_MODULE); + if (mvneta_btf) { + btf_id_xdp_hints = btf_find_by_name_kind(mvneta_btf, + "xdp_hints_common", + BTF_KIND_STRUCT); + if (btf_id_xdp_hints < 0) + pr_warn("%s: BTF cannot find struct xdp_hints_common", + MVNETA_DRIVER_NAME); + } + ret = cpuhp_setup_state_multi(CPUHP_AP_ONLINE_DYN, "net/mvneta:online", mvneta_cpu_online, mvneta_cpu_down_prepare); @@ -5844,6 +5886,7 @@ module_init(mvneta_driver_init); static void __exit mvneta_driver_exit(void) { + btf_put_module_btf(mvneta_btf); platform_driver_unregister(&mvneta_driver); cpuhp_remove_multi_state(CPUHP_NET_MVNETA_DEAD); cpuhp_remove_multi_state(online_hpstate);