From patchwork Mon Nov 21 21:28:44 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Horatiu Vultur X-Patchwork-Id: 13051614 X-Patchwork-Delegate: kuba@kernel.org 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 BED0BC433FE for ; Mon, 21 Nov 2022 21:24:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229924AbiKUVYr (ORCPT ); Mon, 21 Nov 2022 16:24:47 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47044 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229449AbiKUVYp (ORCPT ); Mon, 21 Nov 2022 16:24:45 -0500 Received: from esa.microchip.iphmx.com (esa.microchip.iphmx.com [68.232.154.123]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7C4DB14D3A; Mon, 21 Nov 2022 13:24:41 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1669065881; x=1700601881; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=WQHtk5rD0UFDH3ezGkF35r6wv2LNLOm3eEkyD65lDDA=; b=XVf0aCtL/681SfdVnHJYCcRLGwk2h6KS2DhLTGV35rVRl61SnuRKQxcD 1miEamsZQ0BdFSwinx677UyR6A/SmfitHH+ubDB5jtKK5vSvUiV98Vvg0 sKSK1QKmiA1TLAhdFBsIdj2VwlrQYhzVzl9URQPfF9WwGAs0MnLYno+Ml aDiIHYUPgVybIxKF17d91junP6h4Ic+TaHFaGTPYBY/ovCt3/dBs9CbDx SsVdmyCkbZi+42nkmxebCQB4lxhmpLBm8YiTN7EI93MxgINKGhE+cAWxQ Qh1kCpUy/rGNNeewpLA/knQdWgjc9ltP76pze88R4FPJXd35G/vnscYe6 w==; X-IronPort-AV: E=Sophos;i="5.96,182,1665471600"; d="scan'208";a="124468619" Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa6.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 21 Nov 2022 14:24:40 -0700 Received: from chn-vm-ex02.mchp-main.com (10.10.87.72) by chn-vm-ex02.mchp-main.com (10.10.87.72) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.12; Mon, 21 Nov 2022 14:24:35 -0700 Received: from soft-dev3-1.microsemi.net (10.10.115.15) by chn-vm-ex02.mchp-main.com (10.10.85.144) with Microsoft SMTP Server id 15.1.2507.12 via Frontend Transport; Mon, 21 Nov 2022 14:24:33 -0700 From: Horatiu Vultur To: , , CC: , , , , , , , , , Horatiu Vultur Subject: [PATCH net-next v3 1/7] net: lan966x: Add XDP_PACKET_HEADROOM Date: Mon, 21 Nov 2022 22:28:44 +0100 Message-ID: <20221121212850.3212649-2-horatiu.vultur@microchip.com> X-Mailer: git-send-email 2.38.0 In-Reply-To: <20221121212850.3212649-1-horatiu.vultur@microchip.com> References: <20221121212850.3212649-1-horatiu.vultur@microchip.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org Update the page_pool params to allocate XDP_PACKET_HEADROOM space as headroom for all received frames. This is needed for when the XDP_TX and XDP_REDIRECT are implemented. Signed-off-by: Horatiu Vultur --- .../ethernet/microchip/lan966x/lan966x_fdma.c | 16 +++++++++++----- .../net/ethernet/microchip/lan966x/lan966x_xdp.c | 3 ++- 2 files changed, 13 insertions(+), 6 deletions(-) diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_fdma.c b/drivers/net/ethernet/microchip/lan966x/lan966x_fdma.c index 5fbbd479cfb06..3055124b4dd79 100644 --- a/drivers/net/ethernet/microchip/lan966x/lan966x_fdma.c +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_fdma.c @@ -1,5 +1,7 @@ // SPDX-License-Identifier: GPL-2.0+ +#include + #include "lan966x_main.h" static int lan966x_fdma_channel_active(struct lan966x *lan966x) @@ -16,7 +18,7 @@ static struct page *lan966x_fdma_rx_alloc_page(struct lan966x_rx *rx, if (unlikely(!page)) return NULL; - db->dataptr = page_pool_get_dma_addr(page); + db->dataptr = page_pool_get_dma_addr(page) + XDP_PACKET_HEADROOM; return page; } @@ -72,7 +74,7 @@ static int lan966x_fdma_rx_alloc_page_pool(struct lan966x_rx *rx) .nid = NUMA_NO_NODE, .dev = lan966x->dev, .dma_dir = DMA_FROM_DEVICE, - .offset = 0, + .offset = XDP_PACKET_HEADROOM, .max_len = rx->max_mtu - SKB_DATA_ALIGN(sizeof(struct skb_shared_info)), }; @@ -432,11 +434,13 @@ static int lan966x_fdma_rx_check_frame(struct lan966x_rx *rx, u64 *src_port) if (unlikely(!page)) return FDMA_ERROR; - dma_sync_single_for_cpu(lan966x->dev, (dma_addr_t)db->dataptr, + dma_sync_single_for_cpu(lan966x->dev, + (dma_addr_t)db->dataptr + XDP_PACKET_HEADROOM, FDMA_DCB_STATUS_BLOCKL(db->status), DMA_FROM_DEVICE); - lan966x_ifh_get_src_port(page_address(page), src_port); + lan966x_ifh_get_src_port(page_address(page) + XDP_PACKET_HEADROOM, + src_port); if (WARN_ON(*src_port >= lan966x->num_phys_ports)) return FDMA_ERROR; @@ -466,6 +470,7 @@ static struct sk_buff *lan966x_fdma_rx_get_frame(struct lan966x_rx *rx, skb_mark_for_recycle(skb); + skb_reserve(skb, XDP_PACKET_HEADROOM); skb_put(skb, FDMA_DCB_STATUS_BLOCKL(db->status)); lan966x_ifh_get_timestamp(skb->data, ×tamp); @@ -786,7 +791,8 @@ static int lan966x_fdma_get_max_frame(struct lan966x *lan966x) return lan966x_fdma_get_max_mtu(lan966x) + IFH_LEN_BYTES + SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) + - VLAN_HLEN * 2; + VLAN_HLEN * 2 + + XDP_PACKET_HEADROOM; } int lan966x_fdma_change_mtu(struct lan966x *lan966x) diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_xdp.c b/drivers/net/ethernet/microchip/lan966x/lan966x_xdp.c index e77d9f2aad2b4..8ebde1eb6a09c 100644 --- a/drivers/net/ethernet/microchip/lan966x/lan966x_xdp.c +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_xdp.c @@ -44,7 +44,8 @@ int lan966x_xdp_run(struct lan966x_port *port, struct page *page, u32 data_len) xdp_init_buff(&xdp, PAGE_SIZE << lan966x->rx.page_order, &port->xdp_rxq); - xdp_prepare_buff(&xdp, page_address(page), IFH_LEN_BYTES, + xdp_prepare_buff(&xdp, page_address(page), + IFH_LEN_BYTES + XDP_PACKET_HEADROOM, data_len - IFH_LEN_BYTES, false); act = bpf_prog_run_xdp(xdp_prog, &xdp); switch (act) {