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Received: from PAXPR04MB9186.eurprd04.prod.outlook.com (2603:10a6:102:232::18) by DBBPR04MB7899.eurprd04.prod.outlook.com (2603:10a6:10:1e1::21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4995.27; Tue, 22 Feb 2022 16:24:15 +0000 Received: from PAXPR04MB9186.eurprd04.prod.outlook.com ([fe80::9ce4:9be4:64f8:9c6]) by PAXPR04MB9186.eurprd04.prod.outlook.com ([fe80::9ce4:9be4:64f8:9c6%6]) with mapi id 15.20.4995.027; Tue, 22 Feb 2022 16:24:15 +0000 From: Frank Li To: helgaas@kernel.org, kishon@ti.com, lorenzo.pieralisi@arm.com, kw@linux.com, jingoohan1@gmail.com, gustavo.pimentel@synopsys.com, lznuaa@gmail.com, hongxing.zhu@nxp.com, jdmason@kudzu.us, dave.jiang@intel.com, allenbh@gmail.com Cc: linux-ntb@googlegroups.com, linux-pci@vger.kernel.org Subject: [PATCH V2 0/4] NTB function for PCIe RC to EP connection Date: Tue, 22 Feb 2022 10:23:51 -0600 Message-Id: <20220222162355.32369-1-Frank.Li@nxp.com> X-Mailer: git-send-email 2.24.0.rc1 X-ClientProxiedBy: SJ0PR13CA0190.namprd13.prod.outlook.com (2603:10b6:a03:2c3::15) To PAXPR04MB9186.eurprd04.prod.outlook.com (2603:10a6:102:232::18) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 57f58000-413a-4639-ece4-08d9f61fc4be X-MS-TrafficTypeDiagnostic: DBBPR04MB7899:EE_ X-Microsoft-Antispam-PRVS: X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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The existed ntb epf need two PCI EPs and two PCI Host. This just need EP to RC connections. ┌────────────┐ ┌─────────────────────────────────────┐ │ │ │ │ ├────────────┤ │ ┌──────────────┤ │ NTB │ │ │ NTB │ │ NetDev │ │ │ NetDev │ ├────────────┤ │ ├──────────────┤ │ NTB │ │ │ NTB │ │ Transfer │ │ │ Transfer │ ├────────────┤ │ ├──────────────┤ │ │ │ │ │ │ PCI NTB │ │ │ │ │ EPF │ │ │ │ │ Driver │ │ │ PCI Virtual │ │ │ ├───────────────┐ │ NTB Driver │ │ │ │ PCI EP NTB │◄────►│ │ │ │ │ FN Driver │ │ │ ├────────────┤ ├───────────────┤ ├──────────────┤ │ │ │ │ │ │ │ PCI BUS │ ◄─────► │ PCI EP BUS │ │ Virtual PCI │ │ │ PCI │ │ │ BUS │ └────────────┘ └───────────────┴──────┴──────────────┘ PCI RC PCI EP Frank Li (4): PCI: designware-ep: Allow pci_epc_set_bar() update inbound map address NTB: epf: Allow more flexibility in the memory BAR map method PCI: endpoint: Support NTB transfer between RC and EP Documentation: PCI: Add specification for the PCI vNTB function device Documentation/PCI/endpoint/index.rst | 2 + .../PCI/endpoint/pci-vntb-function.rst | 126 ++ Documentation/PCI/endpoint/pci-vntb-howto.rst | 167 ++ drivers/ntb/hw/epf/ntb_hw_epf.c | 48 +- .../pci/controller/dwc/pcie-designware-ep.c | 10 +- drivers/pci/endpoint/functions/Kconfig | 11 + drivers/pci/endpoint/functions/Makefile | 1 + drivers/pci/endpoint/functions/pci-epf-vntb.c | 1424 +++++++++++++++++ 8 files changed, 1775 insertions(+), 14 deletions(-) create mode 100644 Documentation/PCI/endpoint/pci-vntb-function.rst create mode 100644 Documentation/PCI/endpoint/pci-vntb-howto.rst create mode 100644 drivers/pci/endpoint/functions/pci-epf-vntb.c