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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 90DB2C3DA4A for ; Fri, 2 Aug 2024 08:22:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=cVA3KSjGKzz0infH/ajrMtNFEZmegRydGsvJox3T7UY=; b=av4sewsFA20vQh373oSDcFxpoO a0hcZ8wYtKK/bzrqf8WWbn7h9sdsI/+sklJHMuUmlV2sg9m3nerLoR4/5CPsPO4ScCpN9DqhLojkY f1yCiT5FgnYcPZmIxBqXUF6woEXl9tujL1mHjbV5qPammGwaTS/9v0DTF4AFJl/rbr9GfFrjOtLix 0BY+UUmL9pISR/pNMArAUDfOyIm7pg+goXym4vhjKr9rytJ9kvvf5mjNxFxPmauEYA9bSocL9s48+ k2QwzAZaiXy/WWtvsyQhmGNAalnHvYgjx10yd3+6tbehHpkZS0ORDss5WTyOBKCgS0xifNgc+UuJY Xbg/D92w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sZnYf-000000085pV-30r6; Fri, 02 Aug 2024 08:22:41 +0000 Received: from pandora.armlinux.org.uk ([2001:4d48:ad52:32c8:5054:ff:fe00:142]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sZnY9-000000085en-2XWn for linux-arm-kernel@lists.infradead.org; Fri, 02 Aug 2024 08:22:11 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=cVA3KSjGKzz0infH/ajrMtNFEZmegRydGsvJox3T7UY=; b=a7YhIvz/hBRIRY22EVQeDn5Gsw wXaTKPqm/II4v6VQuG8sPopnBLFqEofucrqiXtYwz//X7XZs7KkOUA7yuZ+mWGLdHmkE7Tm5aVG4I f052rARoqoQCcDLgIhxCsEQ+mx801ewgCrN10FjJwbw7KeJqrgywOo0PErsxzpHkXgl/wxuKsIH6j yKcMAZHSzBqgsL39kbtHHTUE2jsS06fqkOMeHtHm8k7L7n2Ie6rWiqn2kgF/wMmKBXCV65SUd3OF7 KfQjbpbWTK84mO3z5U/cLuHyF+CHYpYPTztqKFxCZfgTx972S8MxFIF2AfuED0e2QdvDsyR9Lmoj2 aehXoxxw==; Received: from shell.armlinux.org.uk ([fd8f:7570:feb6:1:5054:ff:fe00:4ec]:38364) by pandora.armlinux.org.uk with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1sZnXe-0004yQ-2X; Fri, 02 Aug 2024 09:21:38 +0100 Received: from linux by shell.armlinux.org.uk with local (Exim 4.94.2) (envelope-from ) id 1sZnXf-0007tF-JT; Fri, 02 Aug 2024 09:21:39 +0100 Date: Fri, 2 Aug 2024 09:21:39 +0100 From: "Russell King (Oracle)" To: jitendra.vegiraju@broadcom.com Cc: netdev@vger.kernel.org, alexandre.torgue@foss.st.com, joabreu@synopsys.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, mcoquelin.stm32@gmail.com, bcm-kernel-feedback-list@broadcom.com, richardcochran@gmail.com, ast@kernel.org, daniel@iogearbox.net, hawk@kernel.org, john.fastabend@gmail.com, linux-kernel@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, bpf@vger.kernel.org, andrew@lunn.ch, horms@kernel.org, florian.fainelli@broadcom.com Subject: Re: [PATCH net-next v3 1/3] net: stmmac: Add basic dwxgmac4 support to stmmac core Message-ID: References: <20240802031822.1862030-1-jitendra.vegiraju@broadcom.com> <20240802031822.1862030-2-jitendra.vegiraju@broadcom.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240802031822.1862030-2-jitendra.vegiraju@broadcom.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240802_012209_664562_18376887 X-CRM114-Status: GOOD ( 11.30 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Aug 01, 2024 at 08:18:20PM -0700, jitendra.vegiraju@broadcom.com wrote: > +static int rd_dma_ch_ind(void __iomem *ioaddr, u8 mode, u32 channel) > +{ > + u32 reg_val = 0; > + u32 val = 0; val is unnecessary. > + > + reg_val |= mode << XGMAC4_MSEL_SHIFT & XGMAC4_MODE_SELECT; Consider using: reg_val |= FIELD_PREP(XGMAC4_MODE_SELECT, mode); and similarly everywhere else you use a shift and mask. With this, you can remove _all_ _SHIFT definitions in your header file. > + reg_val |= channel << XGMAC4_AOFF_SHIFT & XGMAC4_ADDR_OFFSET; > + reg_val |= XGMAC4_CMD_TYPE | XGMAC4_OB; > + writel(reg_val, ioaddr + XGMAC4_DMA_CH_IND_CONTROL); > + val = readl(ioaddr + XGMAC4_DMA_CH_IND_DATA); > + return val; return readl(ioaddr + XGMAC4_DMA_CH_IND_DATA); ... > +void dwxgmac4_dma_init(void __iomem *ioaddr, > + struct stmmac_dma_cfg *dma_cfg, int atds) > +{ > + u32 value; > + u32 i; > + > + value = readl(ioaddr + XGMAC_DMA_SYSBUS_MODE); > + > + if (dma_cfg->aal) > + value |= XGMAC_AAL; > + > + if (dma_cfg->eame) > + value |= XGMAC_EAME; What if dma_cfg doesn't have these bits set? Is it possible they will be set in the register? Thanks. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!