From patchwork Fri Jan 30 13:46:08 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Baptiste Reynal X-Patchwork-Id: 5750481 Return-Path: X-Original-To: patchwork-kvm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 64E22BF6C3 for ; Fri, 30 Jan 2015 13:53:31 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 7D6162025B for ; Fri, 30 Jan 2015 13:53:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8B3202028D for ; Fri, 30 Jan 2015 13:53:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762277AbbA3Nra (ORCPT ); Fri, 30 Jan 2015 08:47:30 -0500 Received: from mail-wi0-f171.google.com ([209.85.212.171]:33312 "EHLO mail-wi0-f171.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758077AbbA3Nr1 (ORCPT ); Fri, 30 Jan 2015 08:47:27 -0500 Received: by mail-wi0-f171.google.com with SMTP id l15so3150128wiw.4 for ; Fri, 30 Jan 2015 05:47:25 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=w3hJ4bLON/ASwR1dT0YmbhURtnbzJLxEDq0+o+sg4JI=; b=H1zKIkpPXjTLVQZhJY5SA8fcYzs8IOoUPCNDosGDgHCVVG/3ZcJDyPdX/rKK/oTATw EFfnCfnOaH4glsrFXeHZdfas5r7SmPGoIXKARWBnhRNQOliNbwWS7QdimikY0xtuuSQL Nb8jKTiDFyXKFWiIJkdHAaU/zapHPYtDDS73VEaZmhvT0JcaMwmqGZV5/EKKmkL2iy3q WijjQbOTcHdG6ltYLXtH3WKJR4/aTAJBms1cVfj0xDQ8uvWhX74J7msqKyGXxsvCD6rB QI+ejoCuth39McDRsm70/xTmbiFS13rGUO5SmEdfsLiKYJHbNW5lPm0sWw5e2tbFyQSz ASpQ== X-Gm-Message-State: ALoCoQkZdMABUutiVVgrldYr3PNZJZY4whQvHhojhOpOrhlF+f4nnAV7nrmgZNx6Pui750zcbNje X-Received: by 10.180.20.141 with SMTP id n13mr4884225wie.73.1422625645694; Fri, 30 Jan 2015 05:47:25 -0800 (PST) Received: from localhost (LPuteaux-656-1-278-113.w80-15.abo.wanadoo.fr. [80.15.154.113]) by mx.google.com with ESMTPSA id hz9sm15006902wjb.17.2015.01.30.05.47.24 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 30 Jan 2015 05:47:25 -0800 (PST) From: Baptiste Reynal To: kvmarm@lists.cs.columbia.edu, iommu@lists.linux-foundation.org, alex.williamson@redhat.com Cc: will.deacon@arm.com, tech@virtualopensystems.com, christoffer.dall@linaro.org, eric.auger@linaro.org, kim.phillips@freescale.com, marc.zyngier@arm.com, Antonios Motakis , linux-kernel@vger.kernel.org (open list), kvm@vger.kernel.org (open list:VFIO DRIVER), linux-api@vger.kernel.org (open list:ABI/API) Subject: [PATCH v13 02/18] vfio: platform: probe to devices on the platform bus Date: Fri, 30 Jan 2015 14:46:08 +0100 Message-Id: <1422625584-3741-3-git-send-email-b.reynal@virtualopensystems.com> X-Mailer: git-send-email 2.2.2 In-Reply-To: <1422625584-3741-1-git-send-email-b.reynal@virtualopensystems.com> References: <1422625584-3741-1-git-send-email-b.reynal@virtualopensystems.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Antonios Motakis Driver to bind to Linux platform devices, and callbacks to discover their resources to be used by the main VFIO PLATFORM code. Signed-off-by: Antonios Motakis --- drivers/vfio/platform/vfio_platform.c | 103 ++++++++++++++++++++++++++++++++++ include/uapi/linux/vfio.h | 1 + 2 files changed, 104 insertions(+) create mode 100644 drivers/vfio/platform/vfio_platform.c diff --git a/drivers/vfio/platform/vfio_platform.c b/drivers/vfio/platform/vfio_platform.c new file mode 100644 index 0000000..cef645c --- /dev/null +++ b/drivers/vfio/platform/vfio_platform.c @@ -0,0 +1,103 @@ +/* + * Copyright (C) 2013 - Virtual Open Systems + * Author: Antonios Motakis + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2, as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include + +#include "vfio_platform_private.h" + +#define DRIVER_VERSION "0.10" +#define DRIVER_AUTHOR "Antonios Motakis " +#define DRIVER_DESC "VFIO for platform devices - User Level meta-driver" + +/* probing devices from the linux platform bus */ + +static struct resource *get_platform_resource(struct vfio_platform_device *vdev, + int num) +{ + struct platform_device *dev = (struct platform_device *) vdev->opaque; + int i; + + for (i = 0; i < dev->num_resources; i++) { + struct resource *r = &dev->resource[i]; + + if (resource_type(r) & (IORESOURCE_MEM|IORESOURCE_IO)) { + if (!num) + return r; + + num--; + } + } + return NULL; +} + +static int get_platform_irq(struct vfio_platform_device *vdev, int i) +{ + struct platform_device *pdev = (struct platform_device *) vdev->opaque; + + return platform_get_irq(pdev, i); +} + +static int vfio_platform_probe(struct platform_device *pdev) +{ + struct vfio_platform_device *vdev; + int ret; + + vdev = kzalloc(sizeof(*vdev), GFP_KERNEL); + if (!vdev) + return -ENOMEM; + + vdev->opaque = (void *) pdev; + vdev->name = pdev->name; + vdev->flags = VFIO_DEVICE_FLAGS_PLATFORM; + vdev->get_resource = get_platform_resource; + vdev->get_irq = get_platform_irq; + + ret = vfio_platform_probe_common(vdev, &pdev->dev); + if (ret) + kfree(vdev); + + return ret; +} + +static int vfio_platform_remove(struct platform_device *pdev) +{ + struct vfio_platform_device *vdev; + + vdev = vfio_platform_remove_common(&pdev->dev); + if (vdev) { + kfree(vdev); + return 0; + } + + return -EINVAL; +} + +static struct platform_driver vfio_platform_driver = { + .probe = vfio_platform_probe, + .remove = vfio_platform_remove, + .driver = { + .name = "vfio-platform", + .owner = THIS_MODULE, + }, +}; + +module_platform_driver(vfio_platform_driver); + +MODULE_VERSION(DRIVER_VERSION); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_DESC); diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h index 9ade02b..4e93a97 100644 --- a/include/uapi/linux/vfio.h +++ b/include/uapi/linux/vfio.h @@ -159,6 +159,7 @@ struct vfio_device_info { __u32 flags; #define VFIO_DEVICE_FLAGS_RESET (1 << 0) /* Device supports reset */ #define VFIO_DEVICE_FLAGS_PCI (1 << 1) /* vfio-pci device */ +#define VFIO_DEVICE_FLAGS_PLATFORM (1 << 2) /* vfio-platform device */ __u32 num_regions; /* Max region index + 1 */ __u32 num_irqs; /* Max IRQ index + 1 */ };