From patchwork Mon Mar 23 17:19:02 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Diana Madalina Craciun X-Patchwork-Id: 11453609 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5402E1668 for ; Mon, 23 Mar 2020 17:21:50 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 19FDF20722 for ; Mon, 23 Mar 2020 17:21:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="cZfSjbIS" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 19FDF20722 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=oss.nxp.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To: References:List-Owner; bh=+EM8hBKSGute5Ob+AJbuT93WRlbCZ8aqt2Lzfgj8MvA=; b=cZf SjbISjITeKcX5H4ZLTxRyH+XoHFydi0IXIvZ1XfjNyFY72bs6QLyP73xtZaXQic5nslpIYx+e8mz8 LvM2ibrtL4r/HrA/5wNer7IV4pXM/7rb1CFA8AYPvTYYx+JEJghpdL6D7Ub86mDxlCrIJ7r7ICHKu KA2x1HenGg0wTiz9ara/dcK5YowNXaC+0K422G851oHs5w+sekZodIE+MsG1V1tFsRRU5af7NhfyF kdDk8eAHW/h7F83MyYjZSRbdmGnJPrl3lg9MjbBI4ea1ORbOZvscVzBZC9JuRb0Dp8laaXJwQhlvJ lTXyIGgAlClDREFveVtfBSQ9L9wxNiA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jGQlm-00077H-Uw; Mon, 23 Mar 2020 17:21:46 +0000 Received: from inva020.nxp.com ([92.121.34.13]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jGQjc-0003n3-Tf for linux-arm-kernel@lists.infradead.org; Mon, 23 Mar 2020 17:19:37 +0000 Received: from inva020.nxp.com (localhost [127.0.0.1]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id E6EA11A14C5; Mon, 23 Mar 2020 18:19:26 +0100 (CET) Received: from inva024.eu-rdc02.nxp.com (inva024.eu-rdc02.nxp.com [134.27.226.22]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id DA8FF1A14A9; Mon, 23 Mar 2020 18:19:26 +0100 (CET) Received: from fsr-ub1864-111.ea.freescale.net (fsr-ub1864-111.ea.freescale.net [10.171.82.141]) by inva024.eu-rdc02.nxp.com (Postfix) with ESMTP id 8C0B72035C; Mon, 23 Mar 2020 18:19:26 +0100 (CET) From: Diana Craciun To: kvm@vger.kernel.org, alex.williamson@redhat.com, laurentiu.tudor@nxp.com, linux-arm-kernel@lists.infradead.org, bharatb.yadav@gmail.com Subject: [PATCH 0/9] vfio/fsl-mc: VFIO support for FSL-MC devices Date: Mon, 23 Mar 2020 19:19:02 +0200 Message-Id: <20200323171911.27178-1-diana.craciun@oss.nxp.com> X-Mailer: git-send-email 2.17.1 X-Virus-Scanned: ClamAV using ClamSMTP X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200323_101933_235593_75EFBBAE X-CRM114-Status: GOOD ( 11.99 ) X-Spam-Score: -2.3 (--) X-Spam-Report: SpamAssassin version 3.4.3 on bombadil.infradead.org summary: Content analysis details: (-2.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [92.121.34.13 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-kernel@vger.kernel.org, Diana Craciun MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DPAA2 (Data Path Acceleration Architecture) consists in mechanisms for processing Ethernet packets, queue management, accelerators, etc. The Management Complex (mc) is a hardware entity that manages the DPAA2 hardware resources. It provides an object-based abstraction for software drivers to use the DPAA2 hardware. The MC mediates operations such as create, discover, destroy of DPAA2 objects. The MC provides memory-mapped I/O command interfaces (MC portals) which DPAA2 software drivers use to operate on DPAA2 objects. A DPRC is a container object that holds other types of DPAA2 objects. Each object in the DPRC is a Linux device and bound to a driver. The MC-bus driver is a platform driver (different from PCI or platform bus). The DPRC driver does runtime management of a bus instance. It performs the initial scan of the DPRC and handles changes in the DPRC configuration (adding/removing objects). All objects inside a container share the same hardware isolation context, meaning that only an entire DPRC can be assigned to a virtual machine. When a container is assigned to a virtual machine, all the objects within that container are assigned to that virtual machine. The DPRC container assigned to the virtual machine is not allowed to change contents (add/remove objects) by the guest. The restriction is set by the host and enforced by the mc hardware. The DPAA2 objects can be directly assigned to the guest. However the MC portals (the memory mapped command interface to the MC) need to be emulated because there are commands that configure the interrupts and the isolation IDs which are virtual in the guest. Example: echo vfio-fsl-mc > /sys/bus/fsl-mc/devices/dprc.2/driver_override echo dprc.2 > /sys/bus/fsl-mc/drivers/vfio-fsl-mc/bind The dprc.2 is bound to the VFIO driver and all the objects within dprc.2 are going to be bound to the VFIO driver. More details about the DPAA2 objects can be found here: Documentation/networking/device_drivers/freescale/dpaa2/overview.rst The patches are dependent on some changes in the mc-bus (bus/fsl-mc) driver. The changes were needed in order to re-use code and to export some more functions that are needed by the VFIO driver. Currenlty the mc-bus patches are under review: https://www.spinics.net/lists/kernel/msg3447567.html Bharat Bhushan (1): vfio/fsl-mc: Add VFIO framework skeleton for fsl-mc devices Diana Craciun (8): vfio/fsl-mc: Scan DPRC objects on vfio-fsl-mc driver bind vfio/fsl-mc: Implement VFIO_DEVICE_GET_INFO ioctl vfio/fsl-mc: Implement VFIO_DEVICE_GET_REGION_INFO ioctl call vfio/fsl-mc: Allow userspace to MMAP fsl-mc device MMIO regions vfio/fsl-mc: Added lock support in preparation for interrupt handling vfio/fsl-mc: Add irq infrastructure for fsl-mc devices vfio/fsl-mc: trigger an interrupt via eventfd vfio/fsl-mc: Add read/write support for fsl-mc devices MAINTAINERS | 6 + drivers/vfio/Kconfig | 1 + drivers/vfio/Makefile | 1 + drivers/vfio/fsl-mc/Kconfig | 9 + drivers/vfio/fsl-mc/Makefile | 4 + drivers/vfio/fsl-mc/vfio_fsl_mc.c | 660 ++++++++++++++++++++++ drivers/vfio/fsl-mc/vfio_fsl_mc_intr.c | 221 ++++++++ drivers/vfio/fsl-mc/vfio_fsl_mc_private.h | 56 ++ include/uapi/linux/vfio.h | 1 + 9 files changed, 959 insertions(+) create mode 100644 drivers/vfio/fsl-mc/Kconfig create mode 100644 drivers/vfio/fsl-mc/Makefile create mode 100644 drivers/vfio/fsl-mc/vfio_fsl_mc.c create mode 100644 drivers/vfio/fsl-mc/vfio_fsl_mc_intr.c create mode 100644 drivers/vfio/fsl-mc/vfio_fsl_mc_private.h