From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932665AbaHYNaF (ORCPT ); Mon, 25 Aug 2014 09:30:05 -0400 Received: from mail-wi0-f176.google.com ([209.85.212.176]:49294 "EHLO mail-wi0-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932450AbaHYN2s (ORCPT ); Mon, 25 Aug 2014 09:28:48 -0400 From: Eric Auger To: eric.auger@st.com, eric.auger@linaro.org, christoffer.dall@linaro.org, marc.zyngier@arm.com, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, alex.williamson@redhat.com, joel.schopp@amd.com, kim.phillips@freescale.com Cc: linux-kernel@vger.kernel.org, patches@linaro.org, will.deacon@arm.com, a.motakis@virtualopensystems.com, a.rigo@virtualopensystems.com, john.liuli@huawei.com Subject: [RFC 5/9] VFIO: Extend external user API Date: Mon, 25 Aug 2014 15:27:40 +0200 Message-Id: <1408973264-30384-6-git-send-email-eric.auger@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1408973264-30384-1-git-send-email-eric.auger@linaro.org> References: <1408973264-30384-1-git-send-email-eric.auger@linaro.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org New functions are added to be called from ARM KVM-VFIO device. - vfio_device_get_external_user enables to get a vfio device from its fd - vfio_device_put_external_user puts the vfio device - vfio_external_get_type enables to retrieve the type of the device (PCI or platform) - vfio_external_get_base_device enables to get the struct device*, useful to access the platform_device Signed-off-by: Eric Auger --- drivers/vfio/vfio.c | 35 +++++++++++++++++++++++++++++++++++ include/linux/vfio.h | 4 ++++ 2 files changed, 39 insertions(+) diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c index 8e84471..c93b9e4 100644 --- a/drivers/vfio/vfio.c +++ b/drivers/vfio/vfio.c @@ -1401,6 +1401,41 @@ void vfio_group_put_external_user(struct vfio_group *group) } EXPORT_SYMBOL_GPL(vfio_group_put_external_user); +struct vfio_device *vfio_device_get_external_user(struct file *filep) +{ + struct vfio_device *vdev = filep->private_data; + + if (filep->f_op != &vfio_device_fops) + return ERR_PTR(-EINVAL); + + vfio_device_get(vdev); + return vdev; +} +EXPORT_SYMBOL_GPL(vfio_device_get_external_user); + +void vfio_device_put_external_user(struct vfio_device *vdev) +{ + vfio_device_put(vdev); +} +EXPORT_SYMBOL_GPL(vfio_device_put_external_user); + +int vfio_external_get_type(struct vfio_device *vdev) +{ + if (!strcmp(vdev->ops->name, "vfio-platform")) + return VFIO_DEVICE_FLAGS_PLATFORM; + else if (!strcmp(vdev->ops->name, "vfio-pci")) + return VFIO_DEVICE_FLAGS_PCI; + else + return -EINVAL; +} +EXPORT_SYMBOL_GPL(vfio_external_get_type); + +struct device *vfio_external_get_base_device(struct vfio_device *vdev) +{ + return vdev->dev; +} +EXPORT_SYMBOL_GPL(vfio_external_get_base_device); + int vfio_external_user_iommu_id(struct vfio_group *group) { return iommu_group_id(group->iommu_group); diff --git a/include/linux/vfio.h b/include/linux/vfio.h index ffe04ed..19e98eb 100644 --- a/include/linux/vfio.h +++ b/include/linux/vfio.h @@ -99,6 +99,10 @@ extern void vfio_group_put_external_user(struct vfio_group *group); extern int vfio_external_user_iommu_id(struct vfio_group *group); extern long vfio_external_check_extension(struct vfio_group *group, unsigned long arg); +extern struct vfio_device *vfio_device_get_external_user(struct file *filep); +extern void vfio_device_put_external_user(struct vfio_device *vdev); +extern int vfio_external_get_type(struct vfio_device *vdev); +extern struct device *vfio_external_get_base_device(struct vfio_device *vdev); struct pci_dev; #ifdef CONFIG_EEH -- 1.9.1