From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755904AbbCBRAu (ORCPT ); Mon, 2 Mar 2015 12:00:50 -0500 Received: from mail-wi0-f180.google.com ([209.85.212.180]:45956 "EHLO mail-wi0-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755887AbbCBRAn (ORCPT ); Mon, 2 Mar 2015 12:00:43 -0500 From: Baptiste Reynal To: iommu@lists.linux-foundation.org, kvmarm@lists.cs.columbia.edu Cc: tech@virtualopensystems.com, Antonios Motakis , Baptiste Reynal , Alex Williamson , 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 v14 02/20] vfio: platform: probe to devices on the platform bus Date: Mon, 2 Mar 2015 17:59:42 +0100 Message-Id: <1425315600-29761-3-git-send-email-b.reynal@virtualopensystems.com> X-Mailer: git-send-email 2.3.1 In-Reply-To: <1425315600-29761-1-git-send-email-b.reynal@virtualopensystems.com> References: <1425315600-29761-1-git-send-email-b.reynal@virtualopensystems.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 Signed-off-by: Baptiste Reynal --- 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 30801a7..e33b04b 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 */ }; -- 2.3.1 From mboxrd@z Thu Jan 1 00:00:00 1970 From: Baptiste Reynal Subject: [PATCH v14 02/20] vfio: platform: probe to devices on the platform bus Date: Mon, 2 Mar 2015 17:59:42 +0100 Message-ID: <1425315600-29761-3-git-send-email-b.reynal@virtualopensystems.com> References: <1425315600-29761-1-git-send-email-b.reynal@virtualopensystems.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1425315600-29761-1-git-send-email-b.reynal@virtualopensystems.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu To: iommu@lists.linux-foundation.org, kvmarm@lists.cs.columbia.edu Cc: "open list:VFIO DRIVER" , "open list:ABI/API" , open list , Alex Williamson , tech@virtualopensystems.com List-Id: linux-api@vger.kernel.org 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 Signed-off-by: Baptiste Reynal --- 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 30801a7..e33b04b 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 */ }; -- 2.3.1