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Message-Id: <20220921104401.38898-8-kevin.tian@intel.com>
Date: Wed, 21 Sep 2022 18:43:53 +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>,
Christoph Hellwig <hch@...radead.org>,
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 v4 07/15] vfio/mbochs: Use the new device life cycle helpers
From: Yi Liu <yi.l.liu@...el.com>
and manage avail_mbytes inside @init/@...ease.
Signed-off-by: Yi Liu <yi.l.liu@...el.com>
Signed-off-by: Kevin Tian <kevin.tian@...el.com>
Reviewed-by: Jason Gunthorpe <jgg@...dia.com>
---
samples/vfio-mdev/mbochs.c | 73 ++++++++++++++++++++++++--------------
1 file changed, 46 insertions(+), 27 deletions(-)
diff --git a/samples/vfio-mdev/mbochs.c b/samples/vfio-mdev/mbochs.c
index 344c2901a82b..6901947e27d2 100644
--- a/samples/vfio-mdev/mbochs.c
+++ b/samples/vfio-mdev/mbochs.c
@@ -505,13 +505,14 @@ static int mbochs_reset(struct mdev_state *mdev_state)
return 0;
}
-static int mbochs_probe(struct mdev_device *mdev)
+static int mbochs_init_dev(struct vfio_device *vdev)
{
- int avail_mbytes = atomic_read(&mbochs_avail_mbytes);
+ struct mdev_state *mdev_state =
+ container_of(vdev, struct mdev_state, vdev);
+ struct mdev_device *mdev = to_mdev_device(vdev->dev);
const struct mbochs_type *type =
&mbochs_types[mdev_get_type_group_id(mdev)];
- struct device *dev = mdev_dev(mdev);
- struct mdev_state *mdev_state;
+ int avail_mbytes = atomic_read(&mbochs_avail_mbytes);
int ret = -ENOMEM;
do {
@@ -520,14 +521,9 @@ static int mbochs_probe(struct mdev_device *mdev)
} while (!atomic_try_cmpxchg(&mbochs_avail_mbytes, &avail_mbytes,
avail_mbytes - type->mbytes));
- mdev_state = kzalloc(sizeof(struct mdev_state), GFP_KERNEL);
- if (mdev_state == NULL)
- goto err_avail;
- vfio_init_group_dev(&mdev_state->vdev, &mdev->dev, &mbochs_dev_ops);
-
mdev_state->vconfig = kzalloc(MBOCHS_CONFIG_SPACE_SIZE, GFP_KERNEL);
- if (mdev_state->vconfig == NULL)
- goto err_mem;
+ if (!mdev_state->vconfig)
+ goto err_avail;
mdev_state->memsize = type->mbytes * 1024 * 1024;
mdev_state->pagecount = mdev_state->memsize >> PAGE_SHIFT;
@@ -535,10 +531,7 @@ static int mbochs_probe(struct mdev_device *mdev)
sizeof(struct page *),
GFP_KERNEL);
if (!mdev_state->pages)
- goto err_mem;
-
- dev_info(dev, "%s: %s, %d MB, %ld pages\n", __func__,
- type->name, type->mbytes, mdev_state->pagecount);
+ goto err_vconfig;
mutex_init(&mdev_state->ops_lock);
mdev_state->mdev = mdev;
@@ -553,19 +546,47 @@ static int mbochs_probe(struct mdev_device *mdev)
mbochs_create_config_space(mdev_state);
mbochs_reset(mdev_state);
+ dev_info(vdev->dev, "%s: %s, %d MB, %ld pages\n", __func__,
+ type->name, type->mbytes, mdev_state->pagecount);
+ return 0;
+
+err_vconfig:
+ kfree(mdev_state->vconfig);
+err_avail:
+ atomic_add(type->mbytes, &mbochs_avail_mbytes);
+ return ret;
+}
+
+static int mbochs_probe(struct mdev_device *mdev)
+{
+ struct mdev_state *mdev_state;
+ int ret = -ENOMEM;
+
+ mdev_state = vfio_alloc_device(mdev_state, vdev, &mdev->dev,
+ &mbochs_dev_ops);
+ if (IS_ERR(mdev_state))
+ return PTR_ERR(mdev_state);
+
ret = vfio_register_emulated_iommu_dev(&mdev_state->vdev);
if (ret)
- goto err_mem;
+ goto err_put_vdev;
dev_set_drvdata(&mdev->dev, mdev_state);
return 0;
-err_mem:
- vfio_uninit_group_dev(&mdev_state->vdev);
+
+err_put_vdev:
+ vfio_put_device(&mdev_state->vdev);
+ return ret;
+}
+
+static void mbochs_release_dev(struct vfio_device *vdev)
+{
+ struct mdev_state *mdev_state =
+ container_of(vdev, struct mdev_state, vdev);
+
+ atomic_add(mdev_state->type->mbytes, &mbochs_avail_mbytes);
kfree(mdev_state->pages);
kfree(mdev_state->vconfig);
- kfree(mdev_state);
-err_avail:
- atomic_add(type->mbytes, &mbochs_avail_mbytes);
- return ret;
+ vfio_free_device(vdev);
}
static void mbochs_remove(struct mdev_device *mdev)
@@ -573,11 +594,7 @@ static void mbochs_remove(struct mdev_device *mdev)
struct mdev_state *mdev_state = dev_get_drvdata(&mdev->dev);
vfio_unregister_group_dev(&mdev_state->vdev);
- vfio_uninit_group_dev(&mdev_state->vdev);
- atomic_add(mdev_state->type->mbytes, &mbochs_avail_mbytes);
- kfree(mdev_state->pages);
- kfree(mdev_state->vconfig);
- kfree(mdev_state);
+ vfio_put_device(&mdev_state->vdev);
}
static ssize_t mbochs_read(struct vfio_device *vdev, char __user *buf,
@@ -1397,6 +1414,8 @@ static struct attribute_group *mdev_type_groups[] = {
static const struct vfio_device_ops mbochs_dev_ops = {
.close_device = mbochs_close_device,
+ .init = mbochs_init_dev,
+ .release = mbochs_release_dev,
.read = mbochs_read,
.write = mbochs_write,
.ioctl = mbochs_ioctl,
--
2.21.3
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