From patchwork Thu Jul 2 08:21:21 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: 1321104 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=JYTSz6tC; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 49yB4s3qn5z9sSd for ; Thu, 2 Jul 2020 18:26:04 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726978AbgGBIWI (ORCPT ); Thu, 2 Jul 2020 04:22:08 -0400 Received: from lelv0142.ext.ti.com ([198.47.23.249]:59346 "EHLO lelv0142.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726362AbgGBIWI (ORCPT ); Thu, 2 Jul 2020 04:22:08 -0400 Received: from lelv0265.itg.ti.com ([10.180.67.224]) by lelv0142.ext.ti.com (8.15.2/8.15.2) with ESMTP id 0628LuYq081675; Thu, 2 Jul 2020 03:21:56 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1593678116; bh=KmDEx84ZylqeHRRIg+ywtR6uqUDz71eDn9DrKmWcHRo=; h=From:To:CC:Subject:Date; b=JYTSz6tCbffjaS8p0R98jFdU890cGlFgkaOIUX73Isf6MRMb/U17YWcenQm9dERCa uNWmCgLlLq60cM9CJqROng6gAsyNsVmRi/7u5UBoPIUD9KHejtBD55BvUyeeVEw5IC /B77fRU9Di3zLD24jEuw3XemZ32TkSelC9dgTAEw= Received: from DFLE112.ent.ti.com (dfle112.ent.ti.com [10.64.6.33]) by lelv0265.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 0628LoK6065017 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 2 Jul 2020 03:21:51 -0500 Received: from DFLE109.ent.ti.com (10.64.6.30) by DFLE112.ent.ti.com (10.64.6.33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3; Thu, 2 Jul 2020 03:21:50 -0500 Received: from lelv0327.itg.ti.com (10.180.67.183) by DFLE109.ent.ti.com (10.64.6.30) 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; Thu, 2 Jul 2020 03:21:50 -0500 Received: from a0393678ub.india.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id 0628LiYC006145; Thu, 2 Jul 2020 03:21:45 -0500 From: Kishon Vijay Abraham I To: Ohad Ben-Cohen , Bjorn Andersson , Jon Mason , Dave Jiang , Allen Hubbe , Lorenzo Pieralisi , Bjorn Helgaas , "Michael S. Tsirkin" , Jason Wang , Paolo Bonzini , Stefan Hajnoczi , Stefano Garzarella CC: , , , , , , , Subject: [RFC PATCH 00/22] Enhance VHOST to enable SoC-to-SoC communication Date: Thu, 2 Jul 2020 13:51:21 +0530 Message-ID: <20200702082143.25259-1-kishon@ti.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org This series enhances Linux Vhost support to enable SoC-to-SoC communication over MMIO. This series enables rpmsg communication between two SoCs using both PCIe RC<->EP and HOST1-NTB-HOST2 1) Modify vhost to use standard Linux driver model 2) Add support in vring to access virtqueue over MMIO 3) Add vhost client driver for rpmsg 4) Add PCIe RC driver (uses virtio) and PCIe EP driver (uses vhost) for rpmsg communication between two SoCs connected to each other 5) Add NTB Virtio driver and NTB Vhost driver for rpmsg communication between two SoCs connected via NTB 6) Add configfs to configure the components UseCase1 : VHOST RPMSG VIRTIO RPMSG + + | | | | | | | | +-----v------+ +------v-------+ | Linux | | Linux | | Endpoint | | Root Complex | | <-----------------> | | | | | | SOC1 | | SOC2 | +------------+ +--------------+ UseCase 2: VHOST RPMSG VIRTIO RPMSG + + | | | | | | | | +------v------+ +------v------+ | | | | | HOST1 | | HOST2 | | | | | +------^------+ +------^------+ | | | | +---------------------------------------------------------------------+ | +------v------+ +------v------+ | | | | | | | | | EP | | EP | | | | CONTROLLER1 | | CONTROLLER2 | | | | <-----------------------------------> | | | | | | | | | | | | | | | | | SoC With Multiple EP Instances | | | | | | (Configured using NTB Function) | | | | +-------------+ +-------------+ | +---------------------------------------------------------------------+ Software Layering: The high-level SW layering should look something like below. This series adds support only for RPMSG VHOST, however something similar should be done for net and scsi. With that any vhost device (PCI, NTB, Platform device, user) can use any of the vhost client driver. +----------------+ +-----------+ +------------+ +----------+ | RPMSG VHOST | | NET VHOST | | SCSI VHOST | | X | +-------^--------+ +-----^-----+ +-----^------+ +----^-----+ | | | | | | | | | | | | +-----------v-----------------v--------------v--------------v----------+ | VHOST CORE | +--------^---------------^--------------------^------------------^-----+ | | | | | | | | | | | | +--------v-------+ +----v------+ +----------v----------+ +----v-----+ | PCI EPF VHOST | | NTB VHOST | |PLATFORM DEVICE VHOST| | X | +----------------+ +-----------+ +---------------------+ +----------+ This was initially proposed here [1] [1] -> https://lore.kernel.org/r/2cf00ec4-1ed6-f66e-6897-006d1a5b6390@ti.com Kishon Vijay Abraham I (22): vhost: Make _feature_ bits a property of vhost device vhost: Introduce standard Linux driver model in VHOST vhost: Add ops for the VHOST driver to configure VHOST device vringh: Add helpers to access vring in MMIO vhost: Add MMIO helpers for operations on vhost virtqueue vhost: Introduce configfs entry for configuring VHOST virtio_pci: Use request_threaded_irq() instead of request_irq() rpmsg: virtio_rpmsg_bus: Disable receive virtqueue callback when reading messages rpmsg: Introduce configfs entry for configuring rpmsg rpmsg: virtio_rpmsg_bus: Add Address Service Notification support rpmsg: virtio_rpmsg_bus: Move generic rpmsg structure to rpmsg_internal.h virtio: Add ops to allocate and free buffer rpmsg: virtio_rpmsg_bus: Use virtio_alloc_buffer() and virtio_free_buffer() rpmsg: Add VHOST based remote processor messaging bus samples/rpmsg: Setup delayed work to send message samples/rpmsg: Wait for address to be bound to rpdev for sending message rpmsg.txt: Add Documentation to configure rpmsg using configfs virtio_pci: Add VIRTIO driver for VHOST on Configurable PCIe Endpoint device PCI: endpoint: Add EP function driver to provide VHOST interface NTB: Add a new NTB client driver to implement VIRTIO functionality NTB: Add a new NTB client driver to implement VHOST functionality NTB: Describe the ntb_virtio and ntb_vhost client in the documentation Documentation/driver-api/ntb.rst | 11 + Documentation/rpmsg.txt | 56 + drivers/ntb/Kconfig | 18 + drivers/ntb/Makefile | 2 + drivers/ntb/ntb_vhost.c | 776 +++++++++++ drivers/ntb/ntb_virtio.c | 853 ++++++++++++ drivers/ntb/ntb_virtio.h | 56 + drivers/pci/endpoint/functions/Kconfig | 11 + drivers/pci/endpoint/functions/Makefile | 1 + .../pci/endpoint/functions/pci-epf-vhost.c | 1144 ++++++++++++++++ drivers/rpmsg/Kconfig | 10 + drivers/rpmsg/Makefile | 3 +- drivers/rpmsg/rpmsg_cfs.c | 394 ++++++ drivers/rpmsg/rpmsg_core.c | 7 + drivers/rpmsg/rpmsg_internal.h | 136 ++ drivers/rpmsg/vhost_rpmsg_bus.c | 1151 +++++++++++++++++ drivers/rpmsg/virtio_rpmsg_bus.c | 184 ++- drivers/vhost/Kconfig | 1 + drivers/vhost/Makefile | 2 +- drivers/vhost/net.c | 10 +- drivers/vhost/scsi.c | 24 +- drivers/vhost/test.c | 17 +- drivers/vhost/vdpa.c | 2 +- drivers/vhost/vhost.c | 730 ++++++++++- drivers/vhost/vhost_cfs.c | 341 +++++ drivers/vhost/vringh.c | 332 +++++ drivers/vhost/vsock.c | 20 +- drivers/virtio/Kconfig | 9 + drivers/virtio/Makefile | 1 + drivers/virtio/virtio_pci_common.c | 25 +- drivers/virtio/virtio_pci_epf.c | 670 ++++++++++ include/linux/mod_devicetable.h | 6 + include/linux/rpmsg.h | 6 + {drivers/vhost => include/linux}/vhost.h | 132 +- include/linux/virtio.h | 3 + include/linux/virtio_config.h | 42 + include/linux/vringh.h | 46 + samples/rpmsg/rpmsg_client_sample.c | 32 +- tools/virtio/virtio_test.c | 2 +- 39 files changed, 7083 insertions(+), 183 deletions(-) create mode 100644 drivers/ntb/ntb_vhost.c create mode 100644 drivers/ntb/ntb_virtio.c create mode 100644 drivers/ntb/ntb_virtio.h create mode 100644 drivers/pci/endpoint/functions/pci-epf-vhost.c create mode 100644 drivers/rpmsg/rpmsg_cfs.c create mode 100644 drivers/rpmsg/vhost_rpmsg_bus.c create mode 100644 drivers/vhost/vhost_cfs.c create mode 100644 drivers/virtio/virtio_pci_epf.c rename {drivers/vhost => include/linux}/vhost.h (66%)