From patchwork Fri Sep 18 06:42:10 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kishon Vijay Abraham I X-Patchwork-Id: 1366705 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=quarantine dis=none) header.from=ti.com Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=ti.com header.i=@ti.com header.a=rsa-sha256 header.s=ti-com-17Q1 header.b=D2HNf770; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4Bt7jS2JNTz9sSf for ; Fri, 18 Sep 2020 19:25:32 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726627AbgIRJZa (ORCPT ); Fri, 18 Sep 2020 05:25:30 -0400 Received: from lelv0142.ext.ti.com ([198.47.23.249]:41286 "EHLO lelv0142.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726298AbgIRJZa (ORCPT ); Fri, 18 Sep 2020 05:25:30 -0400 Received: from lelv0266.itg.ti.com ([10.180.67.225]) by lelv0142.ext.ti.com (8.15.2/8.15.2) with ESMTP id 08I6gaXJ016099; Fri, 18 Sep 2020 01:42:36 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1600411356; bh=lFqkCh1cP+tj9UFVkaUqI+8hDhaypWD8s62IvqB0b5Q=; h=From:To:CC:Subject:Date; b=D2HNf770vWd17LV8fSLziVpQ9wvCyp531qpvtS2LbcMgsrsG372zz5GQHc1HTNap4 szz8iGIYca2pFPc51ptCKGWJyb9puOPpAvfN56AYb7cszQn6usg2btGWlKvNUcRU2B MZ9GvWtG+C6q34klX7mfsefJHrGWo0hpY6BxH2jE= Received: from DLEE101.ent.ti.com (dlee101.ent.ti.com [157.170.170.31]) by lelv0266.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 08I6ga6j081896 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Fri, 18 Sep 2020 01:42:36 -0500 Received: from DLEE107.ent.ti.com (157.170.170.37) by DLEE101.ent.ti.com (157.170.170.31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3; Fri, 18 Sep 2020 01:42:36 -0500 Received: from fllv0039.itg.ti.com (10.64.41.19) by DLEE107.ent.ti.com (157.170.170.37) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3 via Frontend Transport; Fri, 18 Sep 2020 01:42:36 -0500 Received: from a0393678-ssd.ent.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0039.itg.ti.com (8.15.2/8.15.2) with ESMTP id 08I6gUCK094595; Fri, 18 Sep 2020 01:42:31 -0500 From: Kishon Vijay Abraham I To: Bjorn Helgaas , Jonathan Corbet , Kishon Vijay Abraham I , Lorenzo Pieralisi , Arnd Bergmann , Jon Mason , Dave Jiang , Allen Hubbe , Tom Joseph , Rob Herring CC: Greg Kroah-Hartman , , , , Subject: [PATCH v5 00/17] Implement NTB Controller using multiple PCI EP Date: Fri, 18 Sep 2020 12:12:10 +0530 Message-ID: <20200918064227.1463-1-kishon@ti.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org This series is about implementing SW defined NTB using multiple endpoint instances. This series has been tested using 2 endpoint instances in J7 connected to J7 board on one end and DRA7 board on the other end. However there is nothing platform specific for the NTB functionality. This was presented in Linux Plumbers Conference. The presentation can be found @ [1] RFC patch series can be found @ [2] v1 patch series can be found @ [3] v2 patch series can be found @ [4] v3 patch series can be found @ [5] v4 patch series can be found @ [6] Changes from v3: 1) Fixed Documentation edits suggested by Randy Dunlap Changes from v2: 1) Add support for the user to create sub-directory of 'EPF Device' directory (for endpoint function specific configuration using configfs). 2) Add documentation for NTB specific attributes in configfs 3) Check for PCI_CLASS_MEMORY_RAM (PCIe class) before binding ntb_hw_epf driver 4) Other documentation fixes Changes from v1: 1) As per Rob's comment, removed support for creating NTB function device from DT 2) Add support to create NTB EPF device using configfs (added support in configfs to associate primary and secondary EPC with EPF. Changes from RFC: 1) Converted the DT binding patches to YAML schema and merged the DT binding patches together 2) NTB documentation is converted to .rst 3) One HOST can now interrupt the other HOST using MSI-X interrupts 4) Added support for teardown of memory window and doorbell configuration 5) Add support to provide support 64-bit memory window size from DT [1] -> https://www.linuxplumbersconf.org/event/4/contributions/395/attachments/284/481/Implementing_NTB_Controller_Using_PCIe_Endpoint_-_final.pdf [2] -> http://lore.kernel.org/r/20190926112933.8922-1-kishon@ti.com [3] -> http://lore.kernel.org/r/20200514145927.17555-1-kishon@ti.com [4] -> http://lore.kernel.org/r/20200611130525.22746-1-kishon@ti.com [5] -> http://lore.kernel.org/r/20200904075052.8911-1-kishon@ti.com [6] -> http://lore.kernel.org/r/20200915042110.3015-1-kishon@ti.com Kishon Vijay Abraham I (17): Documentation: PCI: Add specification for the *PCI NTB* function device PCI: endpoint: Make *_get_first_free_bar() take into account 64 bit BAR PCI: endpoint: Add helper API to get the 'next' unreserved BAR PCI: endpoint: Make *_free_bar() to return error codes on failure PCI: endpoint: Remove unused pci_epf_match_device() PCI: endpoint: Add support to associate secondary EPC with EPF PCI: endpoint: Add support in configfs to associate two EPCs with EPF PCI: endpoint: Add pci_epc_ops to map MSI irq PCI: endpoint: Add pci_epf_ops for epf drivers to expose function specific attrs PCI: endpoint: Allow user to create sub-directory of 'EPF Device' directory PCI: cadence: Implement ->msi_map_irq() ops PCI: endpoint: Add EP function driver to provide NTB functionality PCI: Add TI J721E device to pci ids NTB: Add support for EPF PCI-Express Non-Transparent Bridge NTB: tool: Enable the NTB/PCIe link on the local or remote side of bridge Documentation: PCI: Add configfs binding documentation for pci-ntb endpoint function Documentation: PCI: Add userguide for PCI endpoint NTB function .../PCI/endpoint/function/binding/pci-ntb.rst | 38 + Documentation/PCI/endpoint/index.rst | 3 + .../PCI/endpoint/pci-endpoint-cfs.rst | 10 + .../PCI/endpoint/pci-ntb-function.rst | 351 +++ Documentation/PCI/endpoint/pci-ntb-howto.rst | 160 ++ drivers/misc/pci_endpoint_test.c | 1 - drivers/ntb/hw/Kconfig | 1 + drivers/ntb/hw/Makefile | 1 + drivers/ntb/hw/epf/Kconfig | 6 + drivers/ntb/hw/epf/Makefile | 1 + drivers/ntb/hw/epf/ntb_hw_epf.c | 751 ++++++ drivers/ntb/test/ntb_tool.c | 1 + .../pci/controller/cadence/pcie-cadence-ep.c | 50 + drivers/pci/endpoint/functions/Kconfig | 12 + drivers/pci/endpoint/functions/Makefile | 1 + drivers/pci/endpoint/functions/pci-epf-ntb.c | 2106 +++++++++++++++++ drivers/pci/endpoint/functions/pci-epf-test.c | 13 +- drivers/pci/endpoint/pci-ep-cfs.c | 176 +- drivers/pci/endpoint/pci-epc-core.c | 131 +- drivers/pci/endpoint/pci-epf-core.c | 105 +- include/linux/pci-epc.h | 38 +- include/linux/pci-epf.h | 28 +- include/linux/pci_ids.h | 1 + 23 files changed, 3918 insertions(+), 67 deletions(-) create mode 100644 Documentation/PCI/endpoint/function/binding/pci-ntb.rst create mode 100644 Documentation/PCI/endpoint/pci-ntb-function.rst create mode 100644 Documentation/PCI/endpoint/pci-ntb-howto.rst create mode 100644 drivers/ntb/hw/epf/Kconfig create mode 100644 drivers/ntb/hw/epf/Makefile create mode 100644 drivers/ntb/hw/epf/ntb_hw_epf.c create mode 100644 drivers/pci/endpoint/functions/pci-epf-ntb.c