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 X-Spam-Level: X-Spam-Status: No, score=-19.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 2E9A8C4332D for ; Tue, 12 Jan 2021 13:18:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 018A822571 for ; Tue, 12 Jan 2021 13:18:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732533AbhALNST (ORCPT ); Tue, 12 Jan 2021 08:18:19 -0500 Received: from mail.kernel.org ([198.145.29.99]:53892 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389501AbhALM5D (ORCPT ); Tue, 12 Jan 2021 07:57:03 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 2486C2312C; Tue, 12 Jan 2021 12:55:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1610456154; bh=aMsWEpKVWH1Rl/dMhyks5Uqr+pvexaRExzaT85Cp/Mg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PlZyq/ZqmMuuwfAQT7RRfOsbkEmedon9QgMbg7522YSZNkTSk8aPL7u/IBNvMhWBQ +MyFcgcrVzixJ5+pk8nOVDNwyaC6mvtxGzgde3Ko20AxeyjA72V8z4gKY7O5rVLn2V YtyyVuZvaPrB3Vqg8mSAZIdNMuJir3g0qXyihO1vR0Kqqoq7rbvDmsl72eu/xZQ5R7 clDM4JS+33amnNQ8S/4iAkcw0gC2tqzHQ0ahJmmVIM4lR5IUYV6cQixBIhxUufz3y9 HMQaQvTnhM9VAgj/tTr/SyFxcp4B327mKzOQP9CNKyabOkbIEMBxkZm1gCsVTui6hZ E3ioyhxCErMcg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Rasmus Villemoes , Jakub Kicinski , Sasha Levin , netdev@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: [PATCH AUTOSEL 5.10 14/51] ethernet: ucc_geth: fix definition and size of ucc_geth_tx_global_pram Date: Tue, 12 Jan 2021 07:54:56 -0500 Message-Id: <20210112125534.70280-14-sashal@kernel.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20210112125534.70280-1-sashal@kernel.org> References: <20210112125534.70280-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Rasmus Villemoes [ Upstream commit 887078de2a23689e29d6fa1b75d7cbc544c280be ] Table 8-53 in the QUICC Engine Reference manual shows definitions of fields up to a size of 192 bytes, not just 128. But in table 8-111, one does find the text Base Address of the Global Transmitter Parameter RAM Page. [...] The user needs to allocate 128 bytes for this page. The address must be aligned to the page size. I've checked both rev. 7 (11/2015) and rev. 9 (05/2018) of the manual; they both have this inconsistency (and the table numbers are the same). Adding a bit of debug printing, on my board the struct ucc_geth_tx_global_pram is allocated at offset 0x880, while the (opaque) ucc_geth_thread_data_tx gets allocated immediately afterwards, at 0x900. So whatever the engine writes into the thread data overlaps with the tail of the global tx pram (and devmem says that something does get written during a simple ping). I haven't observed any failure that could be attributed to this, but it seems to be the kind of thing that would be extremely hard to debug. So extend the struct definition so that we do allocate 192 bytes. Signed-off-by: Rasmus Villemoes Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- drivers/net/ethernet/freescale/ucc_geth.h | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/freescale/ucc_geth.h b/drivers/net/ethernet/freescale/ucc_geth.h index 3fe9039721952..c80bed2c995c1 100644 --- a/drivers/net/ethernet/freescale/ucc_geth.h +++ b/drivers/net/ethernet/freescale/ucc_geth.h @@ -575,7 +575,14 @@ struct ucc_geth_tx_global_pram { u32 vtagtable[0x8]; /* 8 4-byte VLAN tags */ u32 tqptr; /* a base pointer to the Tx Queues Memory Region */ - u8 res2[0x80 - 0x74]; + u8 res2[0x78 - 0x74]; + u64 snums_en; + u32 l2l3baseptr; /* top byte consists of a few other bit fields */ + + u16 mtu[8]; + u8 res3[0xa8 - 0x94]; + u32 wrrtablebase; /* top byte is reserved */ + u8 res4[0xc0 - 0xac]; } __packed; /* structure representing Extended Filtering Global Parameters in PRAM */ -- 2.27.0