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Mon, 29 Jul 2024 17:19:47 +0000 (GMT) Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA05.qualcomm.com (8.17.1.19/8.17.1.19) with ESMTPS id 46THJkIj017051 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 29 Jul 2024 17:19:46 GMT Received: from [10.110.106.247] (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Mon, 29 Jul 2024 10:19:45 -0700 Message-ID: <925d1eca-975f-4eec-bdf8-ca07a892361a@quicinc.com> Date: Mon, 29 Jul 2024 10:19:45 -0700 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH V2 0/7] Add power domain and MSI functionality with PCIe host generic ECAM driver To: , , , , , , , , , , , , , , , , , , , , , , , CC: , , , , References: <1721067215-5832-1-git-send-email-quic_mrana@quicinc.com> Content-Language: en-US From: Mayank Rana In-Reply-To: <1721067215-5832-1-git-send-email-quic_mrana@quicinc.com> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 8bit X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: j3DfV2Yq7u24d5QjiHxI1vJcR5BX8XOb X-Proofpoint-ORIG-GUID: j3DfV2Yq7u24d5QjiHxI1vJcR5BX8XOb X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-07-29_15,2024-07-26_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 adultscore=0 lowpriorityscore=0 priorityscore=1501 mlxlogscore=965 malwarescore=0 bulkscore=0 phishscore=0 clxscore=1015 mlxscore=0 spamscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2407110000 definitions=main-2407290116 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240729_102032_834720_4A7B1442 X-CRM114-Status: GOOD ( 17.48 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Bjorn / Mani Gentle ping for your review/feedback on this series. Thank you. Regards, Mayank On 7/15/2024 11:13 AM, Mayank Rana wrote: > Based on previously received feedback, this patch series adds functionalities > with existing PCIe host generic ECAM driver (pci-host-generic.c) to get PCIe > host root complex functionality on Qualcomm SA8775P auto platform. > > Previously sent RFC patchset to have separate Qualcomm PCIe ECAM platform driver: > https://lore.kernel.org/all/d10199df-5fb3-407b-b404-a0a4d067341f@quicinc.com/T/ > > 1. Interface to allow requesting firmware to manage system resources and performing > PCIe Link up (devicetree binding in terms of power domain and runtime PM APIs is used in driver) > 2. Performing D3 cold with system suspend and D0 with system resume (usage of GenPD > framework based power domain controls these operations) > 3. SA8775P is using Synopsys Designware PCIe controller which supports MSI controller. > This MSI functionality is used with PCIe host generic driver after splitting existing MSI > functionality from pcie-designware-host.c file into pcie-designware-msi.c file. > > Below architecture is used on Qualcomm SA8775P auto platform to get ECAM compliant PCIe > controller based functionality. Here firmware VM based PCIe driver takes care of resource > management and performing PCIe link related handling (D0 and D3cold). Linux VM based PCIe > host generic driver uses power domain to request firmware VM to perform these operations > using SCMI interface. > ---------------- > > > ┌────────────────────────┐ > │ │ > ┌──────────────────────┐ │ SHARED MEMORY │ ┌──────────────────────────┐ > │ Firmware VM │ │ │ │ Linux VM │ > │ ┌─────────┐ │ │ │ │ ┌────────────────┐ │ > │ │ Drivers │ ┌──────┐ │ │ │ │ │ PCIE host │ │ > │ │ PCIE PHY◄─┤ │ │ │ ┌────────────────┐ │ │ │ generic driver│ │ > │ │ │ │ SCMI │ │ │ │ │ │ │ │ │ │ > │ │PCIE CTL │ │ │ ├─────────┼───► PCIE ◄───┼─────┐ │ └──┬──────────▲──┘ │ > │ │ ├─►Server│ │ │ │ SHMEM │ │ │ │ │ │ │ > │ │Clk, Vreg│ │ │ │ │ │ │ │ │ │ ┌──▼──────────┴──┐ │ > │ │GPIO,GDSC│ └─▲──┬─┘ │ │ └────────────────┘ │ └──────┼────┤PCIE SCMI Inst │ │ > │ └─────────┘ │ │ │ │ │ │ └──▲──────────┬──┘ │ > │ │ │ │ │ │ │ │ │ │ > └───────────────┼──┼───┘ │ │ └───────┼──────────┼───────┘ > │ │ │ │ │ │ > │ │ └────────────────────────┘ │ │ > │ │ │ │ > │ │ │ │ > │ │ │ │ > │ │ │IRQ │HVC > IRQ │ │HVC │ │ > │ │ │ │ > │ │ │ │ > │ │ │ │ > ┌─────────────────┴──▼───────────────────────────────────────────────────────────┴──────────▼──────────────┐ > │ │ > │ │ > │ HYPERVISOR │ > │ │ > │ │ > │ │ > └──────────────────────────────────────────────────────────────────────────────────────────────────────────┘ > > ┌─────────────┐ ┌─────────────┐ ┌──────────┐ ┌───────────┐ ┌─────────────┐ ┌────────────┐ > │ │ │ │ │ │ │ │ │ PCIE │ │ PCIE │ > │ CLOCK │ │ REGULATOR │ │ GPIO │ │ GDSC │ │ PHY │ │ controller │ > └─────────────┘ └─────────────┘ └──────────┘ └───────────┘ └─────────────┘ └────────────┘ > > ---------- > Changes in V2: > - Drop new PCIe Qcom ECAM driver, and use existing PCIe designware based MSI functionality > - Add power domain based functionality within existing ECAM driver > > Tested: > - Validated NVME functionality with PCIe0 and PCIe1 on SA8775P-RIDE platform > > Mayank Rana (7): > PCI: dwc: Move MSI related code to separate file > PCI: dwc: Add msi_ops to allow DBI based MSI register access > PCI: dwc: Add pcie-designware-msi driver kconfig option > dt-bindings: PCI: host-generic-pci: Add power-domains binding > PCI: host-generic: Add power domain based handling for PCIe controller > dt-bindings: PCI: host-generic-pci: Add snps,dw-pcie-ecam-msi binding > PCI: host-generic: Add dwc MSI based MSI functionality > > .../devicetree/bindings/pci/host-generic-pci.yaml | 64 +++ > drivers/pci/controller/dwc/Kconfig | 8 + > drivers/pci/controller/dwc/Makefile | 1 + > drivers/pci/controller/dwc/pci-keystone.c | 12 +- > drivers/pci/controller/dwc/pcie-designware-host.c | 438 ++------------------- > drivers/pci/controller/dwc/pcie-designware-msi.c | 413 +++++++++++++++++++ > drivers/pci/controller/dwc/pcie-designware-msi.h | 63 +++ > drivers/pci/controller/dwc/pcie-designware.c | 1 + > drivers/pci/controller/dwc/pcie-designware.h | 26 +- > drivers/pci/controller/dwc/pcie-rcar-gen4.c | 1 + > drivers/pci/controller/dwc/pcie-tegra194.c | 5 +- > drivers/pci/controller/pci-host-generic.c | 127 +++++- > 12 files changed, 723 insertions(+), 436 deletions(-) > create mode 100644 drivers/pci/controller/dwc/pcie-designware-msi.c > create mode 100644 drivers/pci/controller/dwc/pcie-designware-msi.h >