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=-9.4 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 BD3FAC2BC61 for ; Tue, 30 Oct 2018 13:28:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 86C8820870 for ; Tue, 30 Oct 2018 13:28:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="uiS9aCIF" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 86C8820870 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728801AbeJ3WWU (ORCPT ); Tue, 30 Oct 2018 18:22:20 -0400 Received: from mail.kernel.org ([198.145.29.99]:53192 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727530AbeJ3WWU (ORCPT ); Tue, 30 Oct 2018 18:22:20 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 31BEA20827; Tue, 30 Oct 2018 13:28:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1540906132; bh=DezObPT7zk6rWNRR0j8kkrRJtL29zgHFqhUI0lWc+1Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=uiS9aCIFVJSdWp0sqgoXK3xtfXbFVPG5iV9mzruZ2muGzQgCapWmWHGmGOhW4nARG UqrSgHthxlLYvCJPVqhAaUTt1LYwZS67rYBu2H0KWU1GK93bs8wJKBonQGhRyx6fr8 IRwUnSeGxc/41C2e43DyG6ca4485gVi5kt0UATb0= From: Sasha Levin To: stable@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Fugang Duan , "David S . Miller" , Sasha Levin Subject: [PATCH AUTOSEL 4.14 09/19] net: fec: don't dump RX FIFO register when not available Date: Tue, 30 Oct 2018 09:28:14 -0400 Message-Id: <20181030132824.218056-9-sashal@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181030132824.218056-1-sashal@kernel.org> References: <20181030132824.218056-1-sashal@kernel.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Fugang Duan [ Upstream commit ec20a63aa8b8ec3223fb25cdb2a49f9f9dfda88c ] Commit db65f35f50e0 ("net: fec: add support of ethtool get_regs") introduce ethool "--register-dump" interface to dump all FEC registers. But not all silicon implementations of the Freescale FEC hardware module have the FRBR (FIFO Receive Bound Register) and FRSR (FIFO Receive Start Register) register, so we should not be trying to dump them on those that don't. To fix it we create a quirk flag, FEC_QUIRK_HAS_RFREG, and check it before dump those RX FIFO registers. Signed-off-by: Fugang Duan Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/freescale/fec.h | 4 ++++ drivers/net/ethernet/freescale/fec_main.c | 16 ++++++++++++---- 2 files changed, 16 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/freescale/fec.h b/drivers/net/ethernet/freescale/fec.h index 44720f83af27..4d4f16ad88c3 100644 --- a/drivers/net/ethernet/freescale/fec.h +++ b/drivers/net/ethernet/freescale/fec.h @@ -451,6 +451,10 @@ struct bufdesc_ex { * initialisation. */ #define FEC_QUIRK_MIB_CLEAR (1 << 15) +/* Only i.MX25/i.MX27/i.MX28 controller supports FRBR,FRSR registers, + * those FIFO receive registers are resolved in other platforms. + */ +#define FEC_QUIRK_HAS_FRREG (1 << 16) struct bufdesc_prop { int qid; diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c index eb2ea231c7ca..01fb35f66276 100644 --- a/drivers/net/ethernet/freescale/fec_main.c +++ b/drivers/net/ethernet/freescale/fec_main.c @@ -89,14 +89,16 @@ static struct platform_device_id fec_devtype[] = { .driver_data = 0, }, { .name = "imx25-fec", - .driver_data = FEC_QUIRK_USE_GASKET | FEC_QUIRK_MIB_CLEAR, + .driver_data = FEC_QUIRK_USE_GASKET | FEC_QUIRK_MIB_CLEAR | + FEC_QUIRK_HAS_FRREG, }, { .name = "imx27-fec", - .driver_data = FEC_QUIRK_MIB_CLEAR, + .driver_data = FEC_QUIRK_MIB_CLEAR | FEC_QUIRK_HAS_FRREG, }, { .name = "imx28-fec", .driver_data = FEC_QUIRK_ENET_MAC | FEC_QUIRK_SWAP_FRAME | - FEC_QUIRK_SINGLE_MDIO | FEC_QUIRK_HAS_RACC, + FEC_QUIRK_SINGLE_MDIO | FEC_QUIRK_HAS_RACC | + FEC_QUIRK_HAS_FRREG, }, { .name = "imx6q-fec", .driver_data = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_GBIT | @@ -2166,7 +2168,13 @@ static void fec_enet_get_regs(struct net_device *ndev, memset(buf, 0, regs->len); for (i = 0; i < ARRAY_SIZE(fec_enet_register_offset); i++) { - off = fec_enet_register_offset[i] / 4; + off = fec_enet_register_offset[i]; + + if ((off == FEC_R_BOUND || off == FEC_R_FSTART) && + !(fep->quirks & FEC_QUIRK_HAS_FRREG)) + continue; + + off >>= 2; buf[off] = readl(&theregs[off]); } } -- 2.17.1