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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-ac2811e5b32sm507919166b.159.2025.03.11.04.13.13 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 11 Mar 2025 04:13:15 -0700 (PDT) Message-ID: <3332fe69-dddb-439d-884f-2b97845c14e1@oss.qualcomm.com> Date: Tue, 11 Mar 2025 12:13:12 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v5 1/7] arm64: dts: qcom: sc7280: Increase config size to 256MB for ECAM feature To: Krishna Chaitanya Chundru , 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?= , Manivannan Sadhasivam , Bjorn Helgaas , Jingoo Han 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 References: <20250309-ecam_v4-v5-0-8eff4b59790d@oss.qualcomm.com> <20250309-ecam_v4-v5-1-8eff4b59790d@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20250309-ecam_v4-v5-1-8eff4b59790d@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-ORIG-GUID: I8U_eZ9RvYng4eP9td3u31oOCWGomV2K X-Authority-Analysis: v=2.4 cv=MJiamNZl c=1 sm=1 tr=0 ts=67d01acd cx=c_pps a=qKBjSQ1v91RyAK45QCPf5w==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=Vs1iUdzkB0EA:10 a=EUspDBNiAAAA:8 a=KKAkSRfTAAAA:8 a=lN5UOK94kOf-3Ws_NdwA:9 a=QEXdDO2ut3YA:10 a=zZCYzV9kfG8A:10 a=NFOGd7dJGGMPyQGDc5-O:22 a=cvBusfyB2V15izCimMoJ:22 X-Proofpoint-GUID: I8U_eZ9RvYng4eP9td3u31oOCWGomV2K X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1093,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-03-11_01,2025-03-11_02,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 impostorscore=0 mlxscore=0 phishscore=0 malwarescore=0 lowpriorityscore=0 mlxlogscore=732 priorityscore=1501 adultscore=0 suspectscore=0 spamscore=0 bulkscore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2502100000 definitions=main-2503110074 On 3/9/25 6:45 AM, 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 > iregion entirely for BAR region. > > This depends on the commit: '10ba0854c5e6 ("PCI: qcom: Disable mirroring > of DBI and iATU register space in BAR region")' > > Signed-off-by: Krishna Chaitanya Chundru > Reviewed-by: Manivannan Sadhasivam > --- Reviewed-by: Konrad Dybcio Konrad