From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (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 B55EE41F5D4 for ; Wed, 2 Sep 2026 09:30:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.168.131 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788341429; cv=none; b=K+7KPhfc/PJQrlJhZnjzV3pbWbUCTVPUgnah2mKMOI/N7e+SeeV/weActm1PHI1N5DEBQGxSMUu793hRZrDZlWjg4E8aBjazvh34wL+TovuBQsVhxHEOxDMeIz8rZwlBLGuwjNh7MSwAuny7B/qXkCDpBuQ5Q8B7hid71b4GR0U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788341429; c=relaxed/simple; bh=wrfDSZuEnMkG3ElTnY9/G9FsHzmlV/3isH+AzfcsoTc=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=aRsv9sDzkJ7YpQmtsGTQKosIudXxev2Kq9DO5358CDZMWUpFo6d9kGZ6C3cxre5K1jFxCCKJ+wyg1Q7r+J67U4HGIMxHceRkNjEwC+QG8pOCC+kanSa/qHeBtcbW/7sCbHSvmH1zHdwUDR6Q33fbnfNAih5zV6B6Vu3HjYsciLo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com; spf=pass smtp.mailfrom=oss.qualcomm.com; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b=fePZ47wV; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b=Kbz5weN1; arc=none smtp.client-ip=205.220.168.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b="fePZ47wV"; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b="Kbz5weN1" Received: from pps.filterd (m0279862.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 6829N3sw590151 for ; Wed, 2 Sep 2026 09:30:27 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=qualcomm.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=qcppdkim1; bh= pOa/6zMXyO9Lka4Syf1HMi+BSQSReukrFRWWaxvn+tw=; b=fePZ47wVqWsGP7fL K2mPl150B/q2xhc8KQgQZpaYbTsEDr7H2Idvi+8QsioujoJnWafAwIxChboEp+nG 3k+qop8Leh/W6VCXt+Ei53rCwjFJY+vy5bX17HiCu/+d69hNj8qKh6ZB147qo8XB nyBDDKc6b09+l2Oc3Cc23dV9uUhg6AcxkcypUkAFkuD4cS/lNgVBTLi4OnF+t7Bq X5TPbaS4E4GbCdXDH5SzZB6k7Fm4UkWIL9MyOUDSRVsiTerZ5S91mYWmAyHzVdyg ueAbXzvN6VQ3TCyoi4YwvFQWIerkZ1GEwF6Vk234J0KbCQxpLonOXW585jUit0b7 BhKbMw== Received: from mail-qk1-f199.google.com (mail-qk1-f199.google.com [209.85.222.199]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 4ge1wpbpub-1 (version=TLSv1.3 cipher=TLS_AES_128_GCM_SHA256 bits=128 verify=NOT) for ; Wed, 02 Sep 2026 09:30:27 +0000 (GMT) Received: by mail-qk1-f199.google.com with SMTP id af79cd13be357-930bd2bfc45so27145285a.1 for ; Wed, 02 Sep 2026 02:30:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oss.qualcomm.com; s=google; t=1788341426; x=1788946226; darn=vger.kernel.org; h=content-transfer-encoding:content-type:in-reply-to:from :content-language:references:cc:to:subject:user-agent:mime-version :date:message-id:from:to:cc:subject:date:message-id:reply-to :content-type; bh=pOa/6zMXyO9Lka4Syf1HMi+BSQSReukrFRWWaxvn+tw=; b=Kbz5weN1onZf2+CA9jEkYFSUEVn42VAav7t3dU6tEBrD6MvsL6/E4gjbL+SXyezuRI Vyiyubg979UFWbY9WOoSuFfMXn00B3l1xK6F8UJeHg1nTERpxl6GWToNzPxckOWRs01n eVFYB/1NTiz3Ew8GS/No7kXITCSezTOmlDGutszvJuHTdDj6Dr1Fuf8hVuBTJgcDiYDV SXXOWUh+h/XuQui7LjwefXhKSf4mGKiLRPolU0LhxXggDrZ+D/0JLYEFXFcHNi+3r30Z O8sG3GYtJFmZv+Oj5E6a7nXIs33eJrwoiVK70Tiq5AHZ5us9HHCxNwfi/vHMBmcEYNy9 Qsjw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1788341426; x=1788946226; h=content-transfer-encoding:content-type:in-reply-to:from :content-language:references:cc:to:subject:user-agent:mime-version :date:message-id:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to:content-type; bh=pOa/6zMXyO9Lka4Syf1HMi+BSQSReukrFRWWaxvn+tw=; b=p/Fm7+rZZzcJWKoJBAfjoHCM6KzWCzg5Kr36Vm9jRKWv+T7aLtdrSb+5BjM8WNTLdf LBS2HmZ7zr5wwWvGxeiEaMxuow59Ve4Pfd8nzLc5ii+Q67Sx2RPWDJBL+jVnO/XOtgR1 3XsFEQfjqrVHJ7DBaIjkBAQePWtTTojgjWHI3VoNgYQbQl8QEz7qzIOd79iZ1na786+C MnnjoX7Wx7gja9OppDzj+CjGnKx6q2Jfu2tgkBVGqROTeRgE7ekI9n92obItGVzhL7Ln hZRQ+KF8v+fVqSqoJF2+dyjs2vys3+neOU690gFAxh2M/tO8pZutAWkPI0N2177y+SVJ eGrQ== X-Forwarded-Encrypted: i=1; AHgh+RqpGDedxz+a5B9BrpBzORv2ga1R4V91sHcNv7JQW9ah0QT/fs10+k33i38YIGVipTcb+yAYMmXTXAIEbWs=@vger.kernel.org X-Gm-Message-State: AFuF++nhpwXWLxT4uKrNvpqN2rIQUR2W2JAlfoC+BACD3wqXZnNM4jEo Z8rpanGFXVPaqJPIu30uaXigsZlRg4qqxnYsMQzcjMzFOyIvUOqVkvkDqjORoffG4DGYVnPXN+C xiBGjdJ5MjgZNawKuc7a98lWgKpYjyA3ezmPNt6x8Qhbjxj229kPXU6hwazD4xPklJNo= X-Gm-Gg: AR+sD13H5qW73cSQc/D3onnk9RxNUULwDEeX6WJcnig4p9FfLTeSmNIsGu4ZCzsAMhA zOI6C09GH2cL74LGZh9ROyO6TWCU26+W2u1ws1EkAnICA7Umc9u4nMehOcwT70vHfIpt6jxkk4s /p6cJI+IfToHyAUwxwFYTeQt+feWTo169eaxNT3TCAuKQfV4mkw7/YJZSjux0ZwjoZNLvi/FzbO mVSYZ1nJ4H0OMXNjZMLDnjRvowQllekceDxqtPO6DDDrAubkajVK/K0dO5sG74pIoA5taTZsc9y U0rgxv7+rJmq0ebhlafzwkcBViVC0euUQvzq8aO5I6YsePGS5EqpFyTp/5Ab8Is9ycczxTBp/eG BaMGyL7lGw1zXmK1K1mvSXA== X-Received: by 2002:a05:620a:40d5:b0:930:a08c:cf9c with SMTP id af79cd13be357-93960e262d0mr236217985a.2.1788341425583; Wed, 02 Sep 2026 02:30:25 -0700 (PDT) X-Received: by 2002:a05:620a:40d5:b0:930:a08c:cf9c with SMTP id af79cd13be357-93960e262d0mr236212985a.2.1788341424949; Wed, 02 Sep 2026 02:30:24 -0700 (PDT) Received: from [192.168.202.12] ([178.235.128.140]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-c25d9236caasm58370966b.27.2026.09.02.02.30.22 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 02 Sep 2026 02:30:23 -0700 (PDT) Message-ID: <46625820-4890-41e9-8355-997fac0c43e2@oss.qualcomm.com> Date: Wed, 2 Sep 2026 11:30:21 +0200 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: (subset) [PATCH v8 0/5] PCI: dwc: Add ECAM support with iATU configuration To: Krishna Chaitanya Chundru , Bjorn Andersson , cros-qcom-dts-watchers@chromium.org, Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Lorenzo Pieralisi , Manivannan Sadhasivam , =?UTF-8?Q?Krzysztof_Wilczy=C5=84ski?= , 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: <20250828-ecam_v4-v8-0-92a30e0fa02d@oss.qualcomm.com> <176160465177.73268.9869510926279916233.b4-ty@kernel.org> Content-Language: en-US From: Konrad Dybcio In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Authority-Analysis: v=2.4 cv=F8JnsKhN c=1 sm=1 tr=0 ts=6a97ecb3 cx=c_pps a=HLyN3IcIa5EE8TELMZ618Q==:117 a=PRfkaYvzSr8QmIIGAkY2Sg==:17 a=IkcTkHD0fZMA:10 a=VdqzKS8jKosA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_K5XuSEh1TEqbUxoQ0s3:22 a=UULHRhTqb_eqUsvF39wA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=bTQJ7kPSJx9SKPbeHEYW:22 X-Proofpoint-GUID: J1YhlasZGEnNuA2Ockq4kz3aD8772eKX X-Proofpoint-Spam-Info: AW1haW4tMjYwOTAyMDA4MiBTYWx0ZWRfXxzFYW7a09/E7 UqH2obmsrgRL7FEoFuKkyTYctLI8Qdz/0Xlo5BswTXpv13l5qSnmNa8+exnQdirfEHKiBgB2rA2 3juvlLvaTBtmjEb83ZWU1o17chohoek= X-Proofpoint-ORIG-GUID: J1YhlasZGEnNuA2Ockq4kz3aD8772eKX X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTAyMDA4MiBTYWx0ZWRfX+y9RyBf/ml3j sC5g1/sclf3ClinoJX4eqmfJc5OIi71fSgMlNc0aHWYmFjA2IzTmjNU0ahJYKk0IaXlQWZ5HmHA UabMfSnebujXu1GOU/lfqE59HBioSHHmmwpZvq5gKpSuzavTMuhh+vYPCXRiV1xzB3rxFQ8DyqR X+Cy6p/Hr1zTPoT6NNe+rbw6SycmU0Bbjx0alHJB8ekBylHyfFXhwhlgldLDrFqHmQVGc7K01q6 U+c3SdMkkME32pgJgL5leHKobMHXGyZ6M8ehWHgDtNNVTmJYgfuY774D8YwYSlPciUQVW5v4Qae 2c8xkpwNStqRIIR62ZPAjg7NdIRUq6cvD0B7RXF9ju12JLxHYjcdDydK2YAlnNOXDu2JaVJneg0 FE9/FB6N9MsVbJnZHhXKxWUSaeTJLbLeZDDQ5mbdv2PgWhTGcRKI/Gq3WVyfTghWEF7DhZvs7Dd 7Ra1vtCiHh9Cae6ZUtQ== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-02_02,2026-09-01_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 priorityscore=1501 spamscore=0 lowpriorityscore=0 impostorscore=0 adultscore=0 malwarescore=0 suspectscore=0 clxscore=1015 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2609020082 On 10/28/25 6:42 PM, Krishna Chaitanya Chundru wrote: > > On 10/28/2025 4:07 AM, Bjorn Andersson wrote: >> 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 > > Hi Bjorn, > > Can you revert this change, this is regression due to this series due to that we have change the logic, > we need to update the dtsi accordingly, I will send a separate for all controllers to enable this ECAM feature. I was doing some unrelated work and came across this. The driver support has been merged a year ago now - let's plumb the missing pieces. Konrad