From mboxrd@z Thu Jan 1 00:00:00 1970 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 EA5E2C433EF for ; Wed, 6 Apr 2022 16:12:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237256AbiDFQOg (ORCPT ); Wed, 6 Apr 2022 12:14:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32938 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237362AbiDFQOZ (ORCPT ); Wed, 6 Apr 2022 12:14:25 -0400 Received: from mail-pj1-x1035.google.com (mail-pj1-x1035.google.com [IPv6:2607:f8b0:4864:20::1035]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 228D832FDF3 for ; Tue, 5 Apr 2022 19:54:36 -0700 (PDT) Received: by mail-pj1-x1035.google.com with SMTP id fu5so1298097pjb.1 for ; Tue, 05 Apr 2022 19:54:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=PP/i9t3HjqcNGRoAib00rN/bbVfjl++putocn/v+uLQ=; b=LlMOkJr4ST0e+awXNznLIynvRDuicWHdtJxjPlWtujn9V1DHnAnctsaz1UL1sBQHvy 0uqKa4wakTmK3AHd7uMRYnwqr8deW6EdF4J4jHbtFLbNN87CynqMfdp83d5IWy4Gsgaf XigHb0Q98Fei4TtwgO2wI42n/NPtSGt7ee5Vc= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=PP/i9t3HjqcNGRoAib00rN/bbVfjl++putocn/v+uLQ=; b=j3DnGFiBTllSrLXEcskDxZK3xF/ogH8j02kmB22VeukhhOF1m3iJu1bepQrIFb6wd9 NFaGH8+TwmcAG1b1w5GNC6KrSzeV5jB0D1genD6ZldrsAzoUMVcUVGdJ4DPsL7DpE1Ui uDBDhf/Y53nyfB63QcT2yrpCi+bIDPXQON8SxVvXX6tO6c/jXgzUu2kW/C9OBYt+E4AL CZTJH1QRJvHYKgE8xfVMhsTfxo+kMKsgplL6iv0DHFVC+Hl1EBy9yU7xJ5KbwQVacUp5 brnPSzOwKIqYC2eSJa57/5A2qZqO217E4/6Nl5c+cL+cHsh7R+TGapX8xbPPJsbb5kFW AF2g== X-Gm-Message-State: AOAM5308h1qW6nb3EPRBl4JuMFcEEkMuCGRK9b5Jxd9iBPfVxJMK6U/Z 1JPBEKpqBJophj6ycdR5Zb+o8NCekyYnZg== X-Google-Smtp-Source: ABdhPJwys51AJvFEd9g1XwyVMeggj4LMrOiR5z5ea/n1N6zJPfcQDbp+eU8KUWmLiSExdoc0vZyUEw== X-Received: by 2002:a17:90b:1a89:b0:1c6:4398:673 with SMTP id ng9-20020a17090b1a8900b001c643980673mr7638044pjb.40.1649213669206; Tue, 05 Apr 2022 19:54:29 -0700 (PDT) Received: from localhost.swdvt.lab.broadcom.net ([192.19.223.252]) by smtp.gmail.com with ESMTPSA id x9-20020a17090a970900b001ca6c59b350sm3395111pjo.2.2022.04.05.19.54.27 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 05 Apr 2022 19:54:28 -0700 (PDT) From: Michael Chan To: davem@davemloft.net Cc: netdev@vger.kernel.org, kuba@kernel.org, gospo@broadcom.com, bpf@vger.kernel.org, john.fastabend@gmail.com, toke@redhat.com, lorenzo@kernel.org, ast@kernel.org, daniel@iogearbox.net, echaudro@redhat.com, pabeni@redhat.com Subject: [PATCH net-next v3 09/11] bnxt: adding bnxt_xdp_build_skb to build skb from multibuffer xdp_buff Date: Tue, 5 Apr 2022 22:53:51 -0400 Message-Id: <1649213633-7662-10-git-send-email-michael.chan@broadcom.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1649213633-7662-1-git-send-email-michael.chan@broadcom.com> References: <1649213633-7662-1-git-send-email-michael.chan@broadcom.com> Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="000000000000f29ccd05dbf37a5f" Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org --000000000000f29ccd05dbf37a5f From: Andy Gospodarek Since we have an xdp_buff with frags there needs to be a way to convert that into a valid sk_buff in the event that XDP_PASS is the resulting operation. This adds a new rx_skb_func when the netdev has an MTU that prevents the packets from sitting in a single page. This also make sure that GRO/LRO stay disabled even when using the aggregation ring for large buffers. v3: Use BNXT_PAGE_MODE_BUF_SIZE for build_skb Signed-off-by: Andy Gospodarek Signed-off-by: Michael Chan --- drivers/net/ethernet/broadcom/bnxt/bnxt.c | 65 +++++++++++++++++-- drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c | 23 +++++++ drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.h | 4 ++ 3 files changed, 85 insertions(+), 7 deletions(-) diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c index f89a45042f38..f96f41c7927e 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c @@ -971,6 +971,39 @@ static void bnxt_reuse_rx_agg_bufs(struct bnxt_cp_ring_info *cpr, u16 idx, rxr->rx_sw_agg_prod = sw_prod; } +static struct sk_buff *bnxt_rx_multi_page_skb(struct bnxt *bp, + struct bnxt_rx_ring_info *rxr, + u16 cons, void *data, u8 *data_ptr, + dma_addr_t dma_addr, + unsigned int offset_and_len) +{ + unsigned int len = offset_and_len & 0xffff; + struct page *page = data; + u16 prod = rxr->rx_prod; + struct sk_buff *skb; + int err; + + err = bnxt_alloc_rx_data(bp, rxr, prod, GFP_ATOMIC); + if (unlikely(err)) { + bnxt_reuse_rx_data(rxr, cons, data); + return NULL; + } + dma_addr -= bp->rx_dma_offset; + dma_unmap_page_attrs(&bp->pdev->dev, dma_addr, PAGE_SIZE, bp->rx_dir, + DMA_ATTR_WEAK_ORDERING); + skb = build_skb(page_address(page), BNXT_PAGE_MODE_BUF_SIZE + + bp->rx_dma_offset); + if (!skb) { + __free_page(page); + return NULL; + } + skb_mark_for_recycle(skb); + skb_reserve(skb, bp->rx_dma_offset); + __skb_put(skb, len); + + return skb; +} + static struct sk_buff *bnxt_rx_page_skb(struct bnxt *bp, struct bnxt_rx_ring_info *rxr, u16 cons, void *data, u8 *data_ptr, @@ -993,7 +1026,6 @@ static struct sk_buff *bnxt_rx_page_skb(struct bnxt *bp, dma_addr -= bp->rx_dma_offset; dma_unmap_page_attrs(&bp->pdev->dev, dma_addr, PAGE_SIZE, bp->rx_dir, DMA_ATTR_WEAK_ORDERING); - page_pool_release_page(rxr->page_pool, page); if (unlikely(!payload)) payload = eth_get_headlen(bp->dev, data_ptr, len); @@ -1004,6 +1036,7 @@ static struct sk_buff *bnxt_rx_page_skb(struct bnxt *bp, return NULL; } + skb_mark_for_recycle(skb); off = (void *)data_ptr - page_address(page); skb_add_rx_frag(skb, 0, page, off, len, PAGE_SIZE); memcpy(skb->data - NET_IP_ALIGN, data_ptr - NET_IP_ALIGN, @@ -1949,6 +1982,14 @@ static int bnxt_rx_pkt(struct bnxt *bp, struct bnxt_cp_ring_info *cpr, rc = -ENOMEM; goto next_rx; } + } else { + skb = bnxt_xdp_build_skb(bp, skb, agg_bufs, rxr->page_pool, &xdp, rxcmp1); + if (!skb) { + /* we should be able to free the old skb here */ + cpr->sw_stats.rx.rx_oom_discards += 1; + rc = -ENOMEM; + goto next_rx; + } } } @@ -3964,14 +4005,21 @@ void bnxt_set_ring_params(struct bnxt *bp) int bnxt_set_rx_skb_mode(struct bnxt *bp, bool page_mode) { if (page_mode) { - if (bp->dev->mtu > BNXT_MAX_PAGE_MODE_MTU) - return -EOPNOTSUPP; - bp->dev->max_mtu = - min_t(u16, bp->max_mtu, BNXT_MAX_PAGE_MODE_MTU); bp->flags &= ~BNXT_FLAG_AGG_RINGS; - bp->flags |= BNXT_FLAG_NO_AGG_RINGS | BNXT_FLAG_RX_PAGE_MODE; + bp->flags |= BNXT_FLAG_RX_PAGE_MODE; + + if (bp->dev->mtu > BNXT_MAX_PAGE_MODE_MTU) { + bp->flags |= BNXT_FLAG_JUMBO; + bp->rx_skb_func = bnxt_rx_multi_page_skb; + bp->dev->max_mtu = + min_t(u16, bp->max_mtu, BNXT_MAX_MTU); + } else { + bp->flags |= BNXT_FLAG_NO_AGG_RINGS; + bp->rx_skb_func = bnxt_rx_page_skb; + bp->dev->max_mtu = + min_t(u16, bp->max_mtu, BNXT_MAX_PAGE_MODE_MTU); + } bp->rx_dir = DMA_BIDIRECTIONAL; - bp->rx_skb_func = bnxt_rx_page_skb; /* Disable LRO or GRO_HW */ netdev_update_features(bp->dev); } else { @@ -11121,6 +11169,9 @@ static netdev_features_t bnxt_fix_features(struct net_device *dev, if (bp->flags & BNXT_FLAG_NO_AGG_RINGS) features &= ~(NETIF_F_LRO | NETIF_F_GRO_HW); + if (!(bp->flags & BNXT_FLAG_TPA)) + features &= ~(NETIF_F_LRO | NETIF_F_GRO_HW); + if (!(features & NETIF_F_GRO)) features &= ~NETIF_F_GRO_HW; diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c index a3924e6030fe..5183357ca11c 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c @@ -361,3 +361,26 @@ int bnxt_xdp(struct net_device *dev, struct netdev_bpf *xdp) } return rc; } + +struct sk_buff * +bnxt_xdp_build_skb(struct bnxt *bp, struct sk_buff *skb, u8 num_frags, + struct page_pool *pool, struct xdp_buff *xdp, + struct rx_cmp_ext *rxcmp1) +{ + struct skb_shared_info *sinfo = xdp_get_shared_info_from_buff(xdp); + + if (!skb) + return NULL; + skb_checksum_none_assert(skb); + if (RX_CMP_L4_CS_OK(rxcmp1)) { + if (bp->dev->features & NETIF_F_RXCSUM) { + skb->ip_summed = CHECKSUM_UNNECESSARY; + skb->csum_level = RX_CMP_ENCAP(rxcmp1); + } + } + xdp_update_skb_shared_info(skb, num_frags, + sinfo->xdp_frags_size, + PAGE_SIZE * sinfo->nr_frags, + xdp_buff_is_frag_pfmemalloc(xdp)); + return skb; +} diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.h b/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.h index 97e7905dbb20..27290f649be3 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.h +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.h @@ -28,4 +28,8 @@ bool bnxt_xdp_attached(struct bnxt *bp, struct bnxt_rx_ring_info *rxr); void bnxt_xdp_buff_init(struct bnxt *bp, struct bnxt_rx_ring_info *rxr, u16 cons, u8 **data_ptr, unsigned int *len, struct xdp_buff *xdp); +struct sk_buff *bnxt_xdp_build_skb(struct bnxt *bp, struct sk_buff *skb, + u8 num_frags, struct page_pool *pool, + struct xdp_buff *xdp, + struct rx_cmp_ext *rxcmp1); #endif -- 2.18.1 --000000000000f29ccd05dbf37a5f Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIIQbQYJKoZIhvcNAQcCoIIQXjCCEFoCAQExDzANBglghkgBZQMEAgEFADALBgkqhkiG9w0BBwGg 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