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Date: Sun, 28 Aug 2022 01:10:31 +0800
From: Kevin Tian <kevin.tian@...el.com>
To: Zhenyu Wang <zhenyuw@...ux.intel.com>,
Zhi Wang <zhi.a.wang@...el.com>,
Jani Nikula <jani.nikula@...ux.intel.com>,
Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
Rodrigo Vivi <rodrigo.vivi@...el.com>,
Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>,
David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>,
Eric Farman <farman@...ux.ibm.com>,
Matthew Rosato <mjrosato@...ux.ibm.com>,
Halil Pasic <pasic@...ux.ibm.com>,
Vineeth Vijayan <vneethv@...ux.ibm.com>,
Peter Oberparleiter <oberpar@...ux.ibm.com>,
Heiko Carstens <hca@...ux.ibm.com>,
Vasily Gorbik <gor@...ux.ibm.com>,
Alexander Gordeev <agordeev@...ux.ibm.com>,
Christian Borntraeger <borntraeger@...ux.ibm.com>,
Sven Schnelle <svens@...ux.ibm.com>,
Tony Krowiak <akrowiak@...ux.ibm.com>,
Jason Herne <jjherne@...ux.ibm.com>,
Harald Freudenberger <freude@...ux.ibm.com>,
Diana Craciun <diana.craciun@....nxp.com>,
Alex Williamson <alex.williamson@...hat.com>,
Cornelia Huck <cohuck@...hat.com>,
Longfang Liu <liulongfang@...wei.com>,
Shameer Kolothum <shameerali.kolothum.thodi@...wei.com>,
Jason Gunthorpe <jgg@...pe.ca>,
Yishai Hadas <yishaih@...dia.com>,
Kevin Tian <kevin.tian@...el.com>,
Eric Auger <eric.auger@...hat.com>,
Kirti Wankhede <kwankhede@...dia.com>,
Leon Romanovsky <leon@...nel.org>,
Abhishek Sahu <abhsahu@...dia.com>,
intel-gvt-dev@...ts.freedesktop.org,
intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
linux-kernel@...r.kernel.org, linux-s390@...r.kernel.org,
kvm@...r.kernel.org
Cc: Yi Liu <yi.l.liu@...el.com>
Subject: [PATCH 09/15] vfio/ap: Use the new device life cycle helpers
From: Yi Liu <yi.l.liu@...el.com>
and manage available_instances inside @init/@...ease.
Signed-off-by: Yi Liu <yi.l.liu@...el.com>
Signed-off-by: Kevin Tian <kevin.tian@...el.com>
---
drivers/s390/crypto/vfio_ap_ops.c | 50 ++++++++++++++++++-------------
1 file changed, 29 insertions(+), 21 deletions(-)
diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c
index 6c8c41fac4e1..803aadfd0876 100644
--- a/drivers/s390/crypto/vfio_ap_ops.c
+++ b/drivers/s390/crypto/vfio_ap_ops.c
@@ -684,42 +684,44 @@ static bool vfio_ap_mdev_filter_matrix(unsigned long *apm, unsigned long *aqm,
AP_DOMAINS);
}
-static int vfio_ap_mdev_probe(struct mdev_device *mdev)
+static int vfio_ap_mdev_init_dev(struct vfio_device *vdev)
{
- struct ap_matrix_mdev *matrix_mdev;
- int ret;
+ struct ap_matrix_mdev *matrix_mdev =
+ container_of(vdev, struct ap_matrix_mdev, vdev);
if ((atomic_dec_if_positive(&matrix_dev->available_instances) < 0))
return -EPERM;
- matrix_mdev = kzalloc(sizeof(*matrix_mdev), GFP_KERNEL);
- if (!matrix_mdev) {
- ret = -ENOMEM;
- goto err_dec_available;
- }
- vfio_init_group_dev(&matrix_mdev->vdev, &mdev->dev,
- &vfio_ap_matrix_dev_ops);
-
- matrix_mdev->mdev = mdev;
+ matrix_mdev->mdev = to_mdev_device(vdev->dev);
vfio_ap_matrix_init(&matrix_dev->info, &matrix_mdev->matrix);
matrix_mdev->pqap_hook = handle_pqap;
vfio_ap_matrix_init(&matrix_dev->info, &matrix_mdev->shadow_apcb);
hash_init(matrix_mdev->qtable.queues);
+ return 0;
+}
+
+static int vfio_ap_mdev_probe(struct mdev_device *mdev)
+{
+ struct ap_matrix_mdev *matrix_mdev;
+ int ret;
+
+ matrix_mdev = vfio_alloc_device(ap_matrix_mdev, vdev, &mdev->dev,
+ &vfio_ap_matrix_dev_ops);
+ if (IS_ERR(matrix_mdev))
+ return PTR_ERR(matrix_mdev);
+
ret = vfio_register_emulated_iommu_dev(&matrix_mdev->vdev);
if (ret)
- goto err_list;
+ goto err_put_vdev;
dev_set_drvdata(&mdev->dev, matrix_mdev);
mutex_lock(&matrix_dev->mdevs_lock);
list_add(&matrix_mdev->node, &matrix_dev->mdev_list);
mutex_unlock(&matrix_dev->mdevs_lock);
return 0;
-err_list:
- vfio_uninit_group_dev(&matrix_mdev->vdev);
- kfree(matrix_mdev);
-err_dec_available:
- atomic_inc(&matrix_dev->available_instances);
+err_put_vdev:
+ vfio_put_device(&matrix_mdev->vdev);
return ret;
}
@@ -766,6 +768,12 @@ static void vfio_ap_mdev_unlink_fr_queues(struct ap_matrix_mdev *matrix_mdev)
}
}
+static void vfio_ap_mdev_release_dev(struct vfio_device *vdev)
+{
+ vfio_free_device(vdev);
+ atomic_inc(&matrix_dev->available_instances);
+}
+
static void vfio_ap_mdev_remove(struct mdev_device *mdev)
{
struct ap_matrix_mdev *matrix_mdev = dev_get_drvdata(&mdev->dev);
@@ -779,9 +787,7 @@ static void vfio_ap_mdev_remove(struct mdev_device *mdev)
list_del(&matrix_mdev->node);
mutex_unlock(&matrix_dev->mdevs_lock);
mutex_unlock(&matrix_dev->guests_lock);
- vfio_uninit_group_dev(&matrix_mdev->vdev);
- kfree(matrix_mdev);
- atomic_inc(&matrix_dev->available_instances);
+ vfio_put_device(&matrix_mdev->vdev);
}
static ssize_t name_show(struct mdev_type *mtype,
@@ -1794,6 +1800,8 @@ static const struct attribute_group vfio_queue_attr_group = {
};
static const struct vfio_device_ops vfio_ap_matrix_dev_ops = {
+ .init = vfio_ap_mdev_init_dev,
+ .release = vfio_ap_mdev_release_dev,
.open_device = vfio_ap_mdev_open_device,
.close_device = vfio_ap_mdev_close_device,
.ioctl = vfio_ap_mdev_ioctl,
--
2.21.3
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