From patchwork Sun Feb 5 22:10:16 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geoff Levand X-Patchwork-Id: 13129147 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 7FA2FC636D4 for ; Sun, 5 Feb 2023 22:10:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229595AbjBEWK0 (ORCPT ); Sun, 5 Feb 2023 17:10:26 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44858 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229522AbjBEWKX (ORCPT ); Sun, 5 Feb 2023 17:10:23 -0500 Received: from merlin.infradead.org (merlin.infradead.org [IPv6:2001:8b0:10b:1234::107]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7B95E1ABEC for ; Sun, 5 Feb 2023 14:10:20 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.20170209; h=Date:To:Subject:From:References: In-Reply-To:Message-Id:Sender:Reply-To:Cc:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description; bh=5rTwwskUPZzJV/mQr5VFwBvGgaEYVVx+4axYWt0kjr8=; b=R2hscksm4lvhIluqehAYmp8v85 KsbDcJkKHRbz/kDUrxdh7lOdvUXJ1gE6pVqf5unE5u09MTpEHVe6f5AsRu40Jnpg8duzBvYYn81Lg UthoCzFRWdiQSjN7K1AetDKRZNOrzHUG/32JjnSN42EXeZyuW36M1Y0qMqiZPwg6i5Zdkk5trEHAw FSsDHSfW2f9IhdfOVaYNQ+7Iki+T8IFcoHV1Xlqy2GsZH7/OrlimAIw5CYKswDpGT4Fb5RMDvnaMP SF9IxsP4ecIgW3HLIcG8rthgWXBJ0SdhEIqnEI7m7kC2uE7rWlhSq3So5Oh92qPq27BkHNhpghgZk m8MOvqZQ==; Received: from geoff by merlin.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1pOnDE-002Oky-TL; Sun, 05 Feb 2023 22:10:17 +0000 Message-Id: <4150b1589ed367e18855c16762ff160e9d73a42f.1675632296.git.geoff@infradead.org> In-Reply-To: References: From: Geoff Levand Patch-Date: Sun, 5 Feb 2023 11:10:22 -0800 Subject: [PATCH net v4 1/2] net/ps3_gelic_net: Fix RX sk_buff length To: netdev@vger.kernel.org, Jakub Kicinski , "David S. Miller" Date: Sun, 05 Feb 2023 22:10:16 +0000 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org The Gelic Ethernet device needs to have the RX sk_buffs aligned to GELIC_NET_RXBUF_ALIGN and the length of the RX sk_buffs must be a multiple of GELIC_NET_RXBUF_ALIGN. The current Gelic Ethernet driver was not allocating sk_buffs large enough to allow for this alignment. Fixes various randomly occurring runtime network errors. Fixes: 02c1889166b4 (ps3: gigabit ethernet driver for PS3, take3) Signed-off-by: Geoff Levand --- drivers/net/ethernet/toshiba/ps3_gelic_net.c | 56 ++++++++++++-------- 1 file changed, 34 insertions(+), 22 deletions(-) diff --git a/drivers/net/ethernet/toshiba/ps3_gelic_net.c b/drivers/net/ethernet/toshiba/ps3_gelic_net.c index cf8de8a7a8a1..7a8b5e1e77a6 100644 --- a/drivers/net/ethernet/toshiba/ps3_gelic_net.c +++ b/drivers/net/ethernet/toshiba/ps3_gelic_net.c @@ -365,51 +365,63 @@ static int gelic_card_init_chain(struct gelic_card *card, * * allocates a new rx skb, iommu-maps it and attaches it to the descriptor. * Activate the descriptor state-wise + * + * Gelic RX sk_buffs must be aligned to GELIC_NET_RXBUF_ALIGN and the length + * must be a multiple of GELIC_NET_RXBUF_ALIGN. */ static int gelic_descr_prepare_rx(struct gelic_card *card, struct gelic_descr *descr) { - int offset; - unsigned int bufsize; + struct device *dev = ctodev(card); + struct { + unsigned int total_bytes; + unsigned int offset; + } aligned_buf; + dma_addr_t cpu_addr; if (gelic_descr_get_status(descr) != GELIC_DESCR_DMA_NOT_IN_USE) dev_info(ctodev(card), "%s: ERROR status\n", __func__); - /* we need to round up the buffer size to a multiple of 128 */ - bufsize = ALIGN(GELIC_NET_MAX_MTU, GELIC_NET_RXBUF_ALIGN); - /* and we need to have it 128 byte aligned, therefore we allocate a - * bit more */ - descr->skb = dev_alloc_skb(bufsize + GELIC_NET_RXBUF_ALIGN - 1); + aligned_buf.total_bytes = (GELIC_NET_RXBUF_ALIGN - 1) + + GELIC_NET_MAX_MTU + (GELIC_NET_RXBUF_ALIGN - 1); + + descr->skb = dev_alloc_skb(aligned_buf.total_bytes); + if (!descr->skb) { - descr->buf_addr = 0; /* tell DMAC don't touch memory */ + descr->buf_addr = 0; return -ENOMEM; } - descr->buf_size = cpu_to_be32(bufsize); + + aligned_buf.offset = + PTR_ALIGN(descr->skb->data, GELIC_NET_RXBUF_ALIGN) - + descr->skb->data; + + descr->buf_size = ALIGN(GELIC_NET_MAX_MTU, GELIC_NET_RXBUF_ALIGN); descr->dmac_cmd_status = 0; descr->result_size = 0; descr->valid_size = 0; descr->data_error = 0; - offset = ((unsigned long)descr->skb->data) & - (GELIC_NET_RXBUF_ALIGN - 1); - if (offset) - skb_reserve(descr->skb, GELIC_NET_RXBUF_ALIGN - offset); - /* io-mmu-map the skb */ - descr->buf_addr = cpu_to_be32(dma_map_single(ctodev(card), - descr->skb->data, - GELIC_NET_MAX_MTU, - DMA_FROM_DEVICE)); + skb_reserve(descr->skb, aligned_buf.offset); + + cpu_addr = dma_map_single(dev, descr->skb->data, descr->buf_size, + DMA_FROM_DEVICE); + + descr->buf_addr = cpu_to_be32(cpu_addr); + if (!descr->buf_addr) { dev_kfree_skb_any(descr->skb); + descr->buf_addr = 0; + descr->buf_size = 0; descr->skb = NULL; - dev_info(ctodev(card), + dev_info(dev, "%s:Could not iommu-map rx buffer\n", __func__); gelic_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE); return -ENOMEM; - } else { - gelic_descr_set_status(descr, GELIC_DESCR_DMA_CARDOWNED); - return 0; } + + gelic_descr_set_status(descr, GELIC_DESCR_DMA_CARDOWNED); + return 0; } /**