linux-kernel - Re: (subset) [PATCH v8 0/5] PCI: dwc: Add ECAM support with iATU configuration

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Message-Id: <175673415116.10403.13836370686011733892.b4-ty@kernel.org>
Date: Mon, 01 Sep 2025 19:12:31 +0530
From: Manivannan Sadhasivam <mani@...nel.org>
To: cros-qcom-dts-watchers@...omium.org, 
 Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Lorenzo Pieralisi <lpieralisi@...nel.org>, 
 Krzysztof Wilczyński <kwilczynski@...nel.org>, 
 Bjorn Helgaas <bhelgaas@...gle.com>, Jingoo Han <jingoohan1@...il.com>, 
 Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org, 
 quic_vbadigan@...cinc.com, quic_mrana@...cinc.com, 
 quic_vpernami@...cinc.com, mmareddy@...cinc.com, 
 Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Subject: Re: (subset) [PATCH v8 0/5] PCI: dwc: Add ECAM support with iATU
 configuration


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 <mani@...nel.org>