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 D4C9533EB0C; Mon, 27 Oct 2025 22:35:13 +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=1761604513; cv=none; b=dM1JwlgzZdJPp/yBWvY3Y35bbauguJTNdMkyzwL5+xNOZqzustNN8HGhaO6WDFUpE+DNqSIg/CLDTaTirjHEhSYSBTEZgQczbXEacy91aVFEduN9wdaYy7hRoCcsqGqDMoXqeNON9qvIrLz3NMef4yVeCtDpe75/hh5sxTfJsdY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761604513; c=relaxed/simple; bh=8d8T0fVc3CjMiXz7m56xc6NAEMg4W2X4YzFd3c3H4FA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=UjDKioRrEMbDzLckB+pbkgzFFDas2F6whoG0wYmAmShKp52oMmDXDKqdwrw5yf85vris7VIi+0X2Y4BdqSMQ8vCWwgImG9IZ2jhE1bykjKdabhvva/VpHmqrZZNXR9TuVzm/XVe4GQmUwPCNq06kgG7Qk4XBaLBcn5ReHrJiDEQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=k0W+ZAG2; 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="k0W+ZAG2" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 59B64C4CEFB; Mon, 27 Oct 2025 22:35:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1761604513; bh=8d8T0fVc3CjMiXz7m56xc6NAEMg4W2X4YzFd3c3H4FA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=k0W+ZAG2oU7yEc3Y0S0vR+iiv/RFKRDFOfI6d1LWXbtmx6eMlCOrkb9qD1w3qOD+S u8KPBjcVsSBo3uNllxHFWJlKP1CnqbWowyrVE3rECJe+Jc+Nc+aL9+XeYhvXTryxG+ 9m6/aDQ2+u6uU8E2gmtZpybU6bDgFx74cYuAu9c5IqBpTJx9pyxXYXXPUqtx0JO/jv cUml4vfvx04wRd9Nzap9bFaY+i2lmIkwC0bzxWtp1B6l/9Puun3hRu2SfAg0Brdsl1 T0GsyBf0YBktlBL6WYr2AZYpqETSi1gtajb2TA4Mvo8QM9WZExvtp4lhxleVEAfo95 dM3x6CZw8kxYg== From: Bjorn Andersson To: cros-qcom-dts-watchers@chromium.org, Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Lorenzo Pieralisi , Manivannan Sadhasivam , =?UTF-8?q?Krzysztof=20Wilczy=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 Subject: Re: (subset) [PATCH v8 0/5] PCI: dwc: Add ECAM support with iATU configuration Date: Mon, 27 Oct 2025 17:37:06 -0500 Message-ID: <176160465177.73268.9869510926279916233.b4-ty@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20250828-ecam_v4-v8-0-92a30e0fa02d@oss.qualcomm.com> References: <20250828-ecam_v4-v8-0-92a30e0fa02d@oss.qualcomm.com> Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit 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! [1/5] arm64: dts: qcom: sc7280: Increase config size to 256MB for ECAM feature commit: 03e928442d469f7d8dafc549638730647202d9ce Best regards, -- Bjorn Andersson