From: Manivannan Sadhasivam <mani@kernel.org>
To: Krishna Chaitanya Chundru <krishna.chundru@oss.qualcomm.com>
Cc: cros-qcom-dts-watchers@chromium.org,
"Bjorn Andersson" <andersson@kernel.org>,
"Konrad Dybcio" <konradybcio@kernel.org>,
"Rob Herring" <robh@kernel.org>,
"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
"Conor Dooley" <conor+dt@kernel.org>,
"Lorenzo Pieralisi" <lpieralisi@kernel.org>,
"Krzysztof Wilczyński" <kw@linux.com>,
"Manivannan Sadhasivam" <manivannan.sadhasivam@linaro.org>,
"Bjorn Helgaas" <bhelgaas@google.com>,
"Jingoo Han" <jingoohan1@gmail.com>,
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_vpernami@quicinc.com,
quic_mrana@quicinc.com, mmareddy@quicinc.com,
"Krishna chaitanya chundru" <quic_krichai@quicinc.com>
Subject: Re: [PATCH v3 1/4] arm64: dts: qcom: sc7280: Increase config size to 256MB for ECAM feature
Date: Fri, 24 Jan 2025 11:10:17 +0530 [thread overview]
Message-ID: <20250124054017.rmrxqa5kyocuf2fi@thinkpad> (raw)
In-Reply-To: <20250121-enable_ecam-v3-1-cd84d3b2a7ba@oss.qualcomm.com>
On Tue, Jan 21, 2025 at 02:32:19PM +0530, Krishna Chaitanya Chundru wrote:
> PCIe ECAM(Enhanced Configuration Access Mechanism) feature requires
> maximum of 256MB configuration space.
>
> To enable this feature increase configuration space size to 256MB. If
> the config space is increased, the BAR space needs to be truncated as
> it resides in the same location. To avoid the bar space truncation move
> config space, DBI, ELBI, iATU to upper PCIe region and use lower PCIe
> region entirely for BAR region.
>
You also need to mention that this change depends on the commit: '10ba0854c5e6
("PCI: qcom: Disable mirroring of DBI and iATU register space in BAR region")'
> Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@oss.qualcomm.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
- Mani
--
மணிவண்ணன் சதாசிவம்
next prev parent reply other threads:[~2025-01-24 5:40 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-01-21 9:02 [PATCH v3 0/4] PCI: dwc: Add ECAM support with iATU configuration Krishna Chaitanya Chundru
2025-01-21 9:02 ` [PATCH v3 1/4] arm64: dts: qcom: sc7280: Increase config size to 256MB for ECAM feature Krishna Chaitanya Chundru
2025-01-24 5:40 ` Manivannan Sadhasivam [this message]
2025-01-21 9:02 ` [PATCH v3 2/4] PCI: dwc: Add ECAM support with iATU configuration Krishna Chaitanya Chundru
2025-01-24 6:12 ` Manivannan Sadhasivam
2025-01-28 12:53 ` Konrad Dybcio
2025-01-21 9:02 ` [PATCH v3 3/4] PCI: dwc: Reduce DT reads by allocating host bridge via DWC glue driver Krishna Chaitanya Chundru
2025-01-24 6:18 ` Manivannan Sadhasivam
2025-01-24 8:26 ` Krishna Chaitanya Chundru
2025-01-24 9:36 ` Manivannan Sadhasivam
2025-01-21 9:02 ` [PATCH v3 4/4] PCI: qcom: Enable ECAM feature Krishna Chaitanya Chundru
2025-01-24 6:58 ` Manivannan Sadhasivam
2025-01-24 8:21 ` Krishna Chaitanya Chundru
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