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Date: Sun, 28 Aug 2022 01:10:32 +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 10/15] vfio/fsl-mc: Use the new device life cycle helpers
From: Yi Liu <yi.l.liu@...el.com>
Export symbol of vfio_release_device_set() so fsl-mc @init can handle
the error path cleanly instead of assuming certain vfio core API can
help release device_set afterwards.
Signed-off-by: Yi Liu <yi.l.liu@...el.com>
Signed-off-by: Kevin Tian <kevin.tian@...el.com>
---
drivers/vfio/fsl-mc/vfio_fsl_mc.c | 87 +++++++++++++++++++------------
drivers/vfio/vfio_main.c | 3 +-
include/linux/vfio.h | 1 +
3 files changed, 56 insertions(+), 35 deletions(-)
diff --git a/drivers/vfio/fsl-mc/vfio_fsl_mc.c b/drivers/vfio/fsl-mc/vfio_fsl_mc.c
index 3feff729f3ce..eec3cb914f57 100644
--- a/drivers/vfio/fsl-mc/vfio_fsl_mc.c
+++ b/drivers/vfio/fsl-mc/vfio_fsl_mc.c
@@ -418,16 +418,7 @@ static int vfio_fsl_mc_mmap(struct vfio_device *core_vdev,
return vfio_fsl_mc_mmap_mmio(vdev->regions[index], vma);
}
-static const struct vfio_device_ops vfio_fsl_mc_ops = {
- .name = "vfio-fsl-mc",
- .open_device = vfio_fsl_mc_open_device,
- .close_device = vfio_fsl_mc_close_device,
- .ioctl = vfio_fsl_mc_ioctl,
- .read = vfio_fsl_mc_read,
- .write = vfio_fsl_mc_write,
- .mmap = vfio_fsl_mc_mmap,
-};
-
+static const struct vfio_device_ops vfio_fsl_mc_ops;
static int vfio_fsl_mc_bus_notifier(struct notifier_block *nb,
unsigned long action, void *data)
{
@@ -518,35 +509,49 @@ static void vfio_fsl_uninit_device(struct vfio_fsl_mc_device *vdev)
bus_unregister_notifier(&fsl_mc_bus_type, &vdev->nb);
}
-static int vfio_fsl_mc_probe(struct fsl_mc_device *mc_dev)
+static int vfio_fsl_mc_init_dev(struct vfio_device *core_vdev)
{
- struct vfio_fsl_mc_device *vdev;
- struct device *dev = &mc_dev->dev;
+ struct vfio_fsl_mc_device *vdev =
+ container_of(core_vdev, struct vfio_fsl_mc_device, vdev);
+ struct fsl_mc_device *mc_dev = to_fsl_mc_device(core_vdev->dev);
int ret;
- vdev = kzalloc(sizeof(*vdev), GFP_KERNEL);
- if (!vdev)
- return -ENOMEM;
-
- vfio_init_group_dev(&vdev->vdev, dev, &vfio_fsl_mc_ops);
vdev->mc_dev = mc_dev;
mutex_init(&vdev->igate);
if (is_fsl_mc_bus_dprc(mc_dev))
- ret = vfio_assign_device_set(&vdev->vdev, &mc_dev->dev);
+ ret = vfio_assign_device_set(core_vdev, &mc_dev->dev);
else
- ret = vfio_assign_device_set(&vdev->vdev, mc_dev->dev.parent);
+ ret = vfio_assign_device_set(core_vdev, mc_dev->dev.parent);
+
if (ret)
- goto out_uninit;
+ return ret;
ret = vfio_fsl_mc_init_device(vdev);
if (ret)
- goto out_uninit;
+ goto err_assign;
+ return 0;
+
+err_assign:
+ vfio_release_device_set(core_vdev);
+ return ret;
+}
+
+static int vfio_fsl_mc_probe(struct fsl_mc_device *mc_dev)
+{
+ struct vfio_fsl_mc_device *vdev;
+ struct device *dev = &mc_dev->dev;
+ int ret;
+
+ vdev = vfio_alloc_device(vfio_fsl_mc_device, vdev, dev,
+ &vfio_fsl_mc_ops);
+ if (IS_ERR(vdev))
+ return PTR_ERR(vdev);
ret = vfio_register_group_dev(&vdev->vdev);
if (ret) {
dev_err(dev, "VFIO_FSL_MC: Failed to add to vfio group\n");
- goto out_device;
+ goto out_put_vdev;
}
ret = vfio_fsl_mc_scan_container(mc_dev);
@@ -557,30 +562,44 @@ static int vfio_fsl_mc_probe(struct fsl_mc_device *mc_dev)
out_group_dev:
vfio_unregister_group_dev(&vdev->vdev);
-out_device:
- vfio_fsl_uninit_device(vdev);
-out_uninit:
- vfio_uninit_group_dev(&vdev->vdev);
- kfree(vdev);
+out_put_vdev:
+ vfio_put_device(&vdev->vdev);
return ret;
}
+void vfio_fsl_mc_release_dev(struct vfio_device *core_vdev)
+{
+ struct vfio_fsl_mc_device *vdev =
+ container_of(core_vdev, struct vfio_fsl_mc_device, vdev);
+
+ vfio_fsl_uninit_device(vdev);
+ mutex_destroy(&vdev->igate);
+ vfio_free_device(core_vdev);
+}
+
static int vfio_fsl_mc_remove(struct fsl_mc_device *mc_dev)
{
struct device *dev = &mc_dev->dev;
struct vfio_fsl_mc_device *vdev = dev_get_drvdata(dev);
vfio_unregister_group_dev(&vdev->vdev);
- mutex_destroy(&vdev->igate);
-
dprc_remove_devices(mc_dev, NULL, 0);
- vfio_fsl_uninit_device(vdev);
-
- vfio_uninit_group_dev(&vdev->vdev);
- kfree(vdev);
+ vfio_put_device(&vdev->vdev);
return 0;
}
+static const struct vfio_device_ops vfio_fsl_mc_ops = {
+ .name = "vfio-fsl-mc",
+ .init = vfio_fsl_mc_init_dev,
+ .release = vfio_fsl_mc_release_dev,
+ .open_device = vfio_fsl_mc_open_device,
+ .close_device = vfio_fsl_mc_close_device,
+ .ioctl = vfio_fsl_mc_ioctl,
+ .read = vfio_fsl_mc_read,
+ .write = vfio_fsl_mc_write,
+ .mmap = vfio_fsl_mc_mmap,
+};
+
static struct fsl_mc_driver vfio_fsl_mc_driver = {
.probe = vfio_fsl_mc_probe,
.remove = vfio_fsl_mc_remove,
diff --git a/drivers/vfio/vfio_main.c b/drivers/vfio/vfio_main.c
index af8aad116f2b..9485da17f2e6 100644
--- a/drivers/vfio/vfio_main.c
+++ b/drivers/vfio/vfio_main.c
@@ -141,7 +141,7 @@ int vfio_assign_device_set(struct vfio_device *device, void *set_id)
}
EXPORT_SYMBOL_GPL(vfio_assign_device_set);
-static void vfio_release_device_set(struct vfio_device *device)
+void vfio_release_device_set(struct vfio_device *device)
{
struct vfio_device_set *dev_set = device->dev_set;
@@ -161,6 +161,7 @@ static void vfio_release_device_set(struct vfio_device *device)
}
xa_unlock(&vfio_device_set_xa);
}
+EXPORT_SYMBOL_GPL(vfio_release_device_set);
#ifdef CONFIG_VFIO_NOIOMMU
static void *vfio_noiommu_open(unsigned long arg)
diff --git a/include/linux/vfio.h b/include/linux/vfio.h
index e1e9e8352903..b0928a81b45a 100644
--- a/include/linux/vfio.h
+++ b/include/linux/vfio.h
@@ -168,6 +168,7 @@ int vfio_register_emulated_iommu_dev(struct vfio_device *device);
void vfio_unregister_group_dev(struct vfio_device *device);
int vfio_assign_device_set(struct vfio_device *device, void *set_id);
+void vfio_release_device_set(struct vfio_device *device);
int vfio_mig_get_next_state(struct vfio_device *device,
enum vfio_device_mig_state cur_fsm,
--
2.21.3
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