From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D86C5335BDB; Mon, 1 Sep 2025 13:42:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756734158; cv=none; b=FfPPixYknNtt8NZgp49Zh8xcVhbYiTrMiFozdEOMbXb+KnYDozGTRyvuOUa01nF57o12Y+GUA7ng5v2TZKFSdGhK/i+8BomVFj5BBdk4nL0O9S4C3kUH8vZV3MQJI/uoRced/iEN+cYovH14A7V7sZdwCR1a4ew7AySgzfc26ic= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756734158; c=relaxed/simple; bh=stSa6AbVOyKjdWayNfoBi8bf/zGdedt720iK82+UpbU=; h=From:To:Cc:In-Reply-To:References:Subject:Message-Id:Date: MIME-Version:Content-Type; b=TYimE423aXg9YznH+c52v48a8E0dlgKmY9IUOqnRmHIkz7Lb/jwuCZKgoKxLRLCB/XEc6Vr9tK92v12rvPBzz55h6JlU8cvn2hzxrzh9vl5W0ZBxsaYHfQgUfCqWK/eM1eDaJtzC8NQ/HtlnJD9iI/amho5yuy/If8g9y4UaNUo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=bqchslqc; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="bqchslqc" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 923C2C4CEF0; Mon, 1 Sep 2025 13:42:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1756734157; bh=stSa6AbVOyKjdWayNfoBi8bf/zGdedt720iK82+UpbU=; h=From:To:Cc:In-Reply-To:References:Subject:Date:From; b=bqchslqcFoOMQT0/h8q8vlwjU1ITL62660X9gRcekGYkdnHHOUX7rXHOeBUWREkQP +hsuCjqHVDdf3P0wNbFIYYWUk89cd2OOj3eM9cuZL/Drhor5e/IW+KeZNG/1Lwp+9U WrTVLMJaYOyv7CBKHuG38FkTHAU4yd1PoyD8MdTS12v8hyfov9zLbTSiQNrO3Okio0 wWLqiTIo7+MEkhEA+UDM49jqlO5EegjvADcJNc/LUxeq3rL5DidsdDNJlg2iBNZ2T8 ovz8GxLGPNAVtE3LKPSJwVpfsK+Ij5Xk/lGB7P1piGMbLKABN3NQQDoITRHkVEl9oY nN2tsEuYn9akg== From: Manivannan Sadhasivam To: cros-qcom-dts-watchers@chromium.org, Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= , Bjorn Helgaas , Jingoo Han , Krishna Chaitanya Chundru Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, quic_vbadigan@quicinc.com, quic_mrana@quicinc.com, quic_vpernami@quicinc.com, mmareddy@quicinc.com, Konrad Dybcio In-Reply-To: <20250828-ecam_v4-v8-0-92a30e0fa02d@oss.qualcomm.com> References: <20250828-ecam_v4-v8-0-92a30e0fa02d@oss.qualcomm.com> Subject: Re: (subset) [PATCH v8 0/5] PCI: dwc: Add ECAM support with iATU configuration Message-Id: <175673415116.10403.13836370686011733892.b4-ty@kernel.org> Date: Mon, 01 Sep 2025 19:12:31 +0530 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Mailer: b4 0.14.2 On Thu, 28 Aug 2025 13:04:21 +0530, Krishna Chaitanya Chundru wrote: > The current implementation requires iATU for every configuration > space access which increases latency & cpu utilization. > > Designware databook 5.20a, section 3.10.10.3 says about CFG Shift Feature, > which shifts/maps the BDF (bits [31:16] of the third header DWORD, which > would be matched against the Base and Limit addresses) of the incoming > CfgRd0/CfgWr0 down to bits[27:12]of the translated address. > > [...] Applied, thanks! [2/5] PCI: dwc: Add support for ELBI resource mapping commit: d39e0103e38f9889271a77a837b6179b42d6730d [3/5] PCI: dwc: qcom: Switch to dwc ELBI resource mapping commit: 6955a13b1349376a00ebca80d1a8e2960de3fb0f [4/5] PCI: dwc: Add ECAM support with iATU configuration commit: 0c959f675ce0338f3bee2636437bce4d5713ea03 [5/5] PCI: qcom: Add support for ECAM feature commit: 0bba488d552dccda4b803fa4b5d4d5d3029d601d Best regards, -- Manivannan Sadhasivam