From: Kirti Wankhede <kwankhede@nvidia.com>
To: <alex.williamson@redhat.com>, <pbonzini@redhat.com>,
<kraxel@redhat.com>, <cjia@nvidia.com>
Cc: <qemu-devel@nongnu.org>, <kvm@vger.kernel.org>,
<kevin.tian@intel.com>, <jike.song@intel.com>,
<bjsdjshi@linux.vnet.ibm.com>, <linux-kernel@vger.kernel.org>,
Kirti Wankhede <kwankhede@nvidia.com>
Subject: [PATCH v13 12/22] vfio: Add notifier callback to parent's ops structure of mdev
Date: Tue, 15 Nov 2016 20:59:55 +0530 [thread overview]
Message-ID: <1479223805-22895-13-git-send-email-kwankhede@nvidia.com> (raw)
In-Reply-To: <1479223805-22895-1-git-send-email-kwankhede@nvidia.com>
Add a notifier calback to parent's ops structure of mdev device so that per
device notifer for vfio module is registered through vfio_mdev module.
Signed-off-by: Kirti Wankhede <kwankhede@nvidia.com>
Signed-off-by: Neo Jia <cjia@nvidia.com>
Change-Id: Iafa6f1721aecdd6e50eb93b153b5621e6d29b637
---
drivers/vfio/mdev/vfio_mdev.c | 25 ++++++++++++++++++++++++-
include/linux/mdev.h | 9 +++++++++
2 files changed, 33 insertions(+), 1 deletion(-)
diff --git a/drivers/vfio/mdev/vfio_mdev.c b/drivers/vfio/mdev/vfio_mdev.c
index ffc36758cb84..4fc63db38829 100644
--- a/drivers/vfio/mdev/vfio_mdev.c
+++ b/drivers/vfio/mdev/vfio_mdev.c
@@ -24,6 +24,15 @@
#define DRIVER_AUTHOR "NVIDIA Corporation"
#define DRIVER_DESC "VFIO based driver for Mediated device"
+static int vfio_mdev_notifier(struct notifier_block *nb, unsigned long action,
+ void *data)
+{
+ struct mdev_device *mdev = container_of(nb, struct mdev_device, nb);
+ struct parent_device *parent = mdev->parent;
+
+ return parent->ops->notifier(mdev, action, data);
+}
+
static int vfio_mdev_open(void *device_data)
{
struct mdev_device *mdev = device_data;
@@ -36,9 +45,18 @@ static int vfio_mdev_open(void *device_data)
if (!try_module_get(THIS_MODULE))
return -ENODEV;
+ if (likely(parent->ops->notifier)) {
+ mdev->nb.notifier_call = vfio_mdev_notifier;
+ if (vfio_register_notifier(&mdev->dev, &mdev->nb))
+ pr_err("Failed to register notifier for mdev\n");
+ }
+
ret = parent->ops->open(mdev);
- if (ret)
+ if (ret) {
+ if (likely(parent->ops->notifier))
+ vfio_unregister_notifier(&mdev->dev, &mdev->nb);
module_put(THIS_MODULE);
+ }
return ret;
}
@@ -51,6 +69,11 @@ static void vfio_mdev_release(void *device_data)
if (likely(parent->ops->release))
parent->ops->release(mdev);
+ if (likely(parent->ops->notifier)) {
+ if (vfio_unregister_notifier(&mdev->dev, &mdev->nb))
+ pr_err("Failed to unregister notifier for mdev\n");
+ }
+
module_put(THIS_MODULE);
}
diff --git a/include/linux/mdev.h b/include/linux/mdev.h
index ec819e9a115a..94c43034c297 100644
--- a/include/linux/mdev.h
+++ b/include/linux/mdev.h
@@ -37,6 +37,7 @@ struct mdev_device {
struct kref ref;
struct list_head next;
struct kobject *type_kobj;
+ struct notifier_block nb;
};
/**
@@ -85,6 +86,12 @@ struct mdev_device {
* @mmap: mmap callback
* @mdev: mediated device structure
* @vma: vma structure
+ * @notifer: Notifier callback, currently only for
+ * VFIO_IOMMU_NOTIFY_DMA_UNMAP action notified duing
+ * DMA_UNMAP call on mapped iova range.
+ * @mdev: mediated device structure
+ * @action: Action for which notifier is called
+ * @data: Data associated with the notifier
* Parent device that support mediated device should be registered with mdev
* module with parent_ops structure.
**/
@@ -106,6 +113,8 @@ struct parent_ops {
ssize_t (*ioctl)(struct mdev_device *mdev, unsigned int cmd,
unsigned long arg);
int (*mmap)(struct mdev_device *mdev, struct vm_area_struct *vma);
+ int (*notifier)(struct mdev_device *mdev, unsigned long action,
+ void *data);
};
/* interface for exporting mdev supported type attributes */
--
2.7.0
next prev parent reply other threads:[~2016-11-15 15:32 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-15 15:29 [PATCH v13 00/22] Add Mediated device support Kirti Wankhede
2016-11-15 15:29 ` [PATCH v13 01/22] vfio: Mediated device Core driver Kirti Wankhede
2016-11-15 15:29 ` [PATCH v13 02/22] vfio: VFIO based driver for Mediated devices Kirti Wankhede
[not found] ` <20161116022958.GA5531@bjsdjshi@linux.vnet.ibm.com>
2016-11-16 15:05 ` Kirti Wankhede
2016-11-15 15:29 ` [PATCH v13 03/22] vfio: Rearrange functions to get vfio_group from dev Kirti Wankhede
2016-11-15 15:29 ` [PATCH v13 04/22] vfio: Common function to increment container_users Kirti Wankhede
2016-11-15 15:29 ` [PATCH v13 05/22] vfio iommu: Added pin and unpin callback functions to vfio_iommu_driver_ops Kirti Wankhede
[not found] ` <20161116030328.GB5531@bjsdjshi@linux.vnet.ibm.com>
2016-11-16 15:06 ` Kirti Wankhede
2016-11-15 15:29 ` [PATCH v13 06/22] vfio iommu type1: Update arguments of vfio_lock_acct Kirti Wankhede
2016-11-15 15:29 ` [PATCH v13 07/22] vfio iommu type1: Update argument of vaddr_get_pfn() Kirti Wankhede
2016-11-15 15:29 ` [PATCH v13 08/22] vfio iommu type1: Add find_iommu_group() function Kirti Wankhede
2016-11-15 15:29 ` [PATCH v13 09/22] vfio iommu type1: Add task structure to vfio_dma Kirti Wankhede
[not found] ` <20161116060628.GC5531@bjsdjshi@linux.vnet.ibm.com>
2016-11-16 15:11 ` Kirti Wankhede
2016-11-15 15:29 ` [PATCH v13 10/22] vfio iommu type1: Add support for mediated devices Kirti Wankhede
2016-11-15 20:54 ` Alex Williamson
2016-11-15 15:29 ` [PATCH v13 11/22] vfio iommu: Add blocking notifier to notify DMA_UNMAP Kirti Wankhede
2016-11-15 22:19 ` Alex Williamson
2016-11-16 2:46 ` Kirti Wankhede
2016-11-16 3:16 ` Alex Williamson
2016-11-16 3:25 ` Alex Williamson
2016-11-16 3:43 ` Kirti Wankhede
2016-11-16 3:58 ` Alex Williamson
2016-11-16 4:16 ` Kirti Wankhede
2016-11-16 4:36 ` Alex Williamson
2016-11-16 15:22 ` Kirti Wankhede
2016-11-15 15:29 ` Kirti Wankhede [this message]
[not found] ` <20161116063759.GD5531@bjsdjshi@linux.vnet.ibm.com>
2016-11-16 15:17 ` [PATCH v13 12/22] vfio: Add notifier callback to parent's ops structure of mdev Kirti Wankhede
2016-11-15 15:29 ` [PATCH v13 13/22] vfio: Introduce common function to add capabilities Kirti Wankhede
2016-11-15 15:29 ` [PATCH v13 14/22] vfio_pci: Update vfio_pci to use vfio_info_add_capability() Kirti Wankhede
2016-11-15 15:29 ` [PATCH v13 15/22] vfio: Introduce vfio_set_irqs_validate_and_prepare() Kirti Wankhede
2016-11-15 15:29 ` [PATCH v13 16/22] vfio_pci: Updated to use vfio_set_irqs_validate_and_prepare() Kirti Wankhede
2016-11-15 15:30 ` [PATCH v13 17/22] vfio_platform: " Kirti Wankhede
2016-11-15 15:30 ` [PATCH v13 18/22] vfio: Define device_api strings Kirti Wankhede
2016-11-15 15:30 ` [PATCH v13 19/22] docs: Add Documentation for Mediated devices Kirti Wankhede
2016-11-15 15:30 ` [PATCH v13 20/22] docs: Sysfs ABI for mediated device framework Kirti Wankhede
2016-11-15 15:30 ` [PATCH v13 21/22] docs: Sample driver to demonstrate how to use Mediated " Kirti Wankhede
2016-11-15 15:30 ` [PATCH v13 22/22] MAINTAINERS: Add entry VFIO based Mediated device drivers Kirti Wankhede
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