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authorYi Liu <yi.l.liu@intel.com>2022-09-21 13:43:52 +0300
committerAlex Williamson <alex.williamson@redhat.com>2022-09-21 23:15:11 +0300
commit67c5a1814f4c1ad0e61f11112010057191730853 (patch)
tree0109a28dd059b70dc2a22fba76ef0581cbd858e3
parent603c09f2873d6e86dce636c9e5ae330e2c033940 (diff)
downloadlinux-67c5a1814f4c1ad0e61f11112010057191730853.tar.xz
vfio/mtty: Use the new device life cycle helpers
and manage available ports inside @init/@release. Signed-off-by: Yi Liu <yi.l.liu@intel.com> Signed-off-by: Kevin Tian <kevin.tian@intel.com> Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Link: https://lore.kernel.org/r/20220921104401.38898-7-kevin.tian@intel.com Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
-rw-r--r--samples/vfio-mdev/mtty.c67
1 files changed, 39 insertions, 28 deletions
diff --git a/samples/vfio-mdev/mtty.c b/samples/vfio-mdev/mtty.c
index f42a59ed2e3f..d151928e4f21 100644
--- a/samples/vfio-mdev/mtty.c
+++ b/samples/vfio-mdev/mtty.c
@@ -703,9 +703,11 @@ accessfailed:
return ret;
}
-static int mtty_probe(struct mdev_device *mdev)
+static int mtty_init_dev(struct vfio_device *vdev)
{
- struct mdev_state *mdev_state;
+ struct mdev_state *mdev_state =
+ container_of(vdev, struct mdev_state, vdev);
+ struct mdev_device *mdev = to_mdev_device(vdev->dev);
int nr_ports = mdev_get_type_group_id(mdev) + 1;
int avail_ports = atomic_read(&mdev_avail_ports);
int ret;
@@ -716,58 +718,65 @@ static int mtty_probe(struct mdev_device *mdev)
} while (!atomic_try_cmpxchg(&mdev_avail_ports,
&avail_ports, avail_ports - nr_ports));
- mdev_state = kzalloc(sizeof(struct mdev_state), GFP_KERNEL);
- if (mdev_state == NULL) {
- ret = -ENOMEM;
- goto err_nr_ports;
- }
-
- vfio_init_group_dev(&mdev_state->vdev, &mdev->dev, &mtty_dev_ops);
-
mdev_state->nr_ports = nr_ports;
mdev_state->irq_index = -1;
mdev_state->s[0].max_fifo_size = MAX_FIFO_SIZE;
mdev_state->s[1].max_fifo_size = MAX_FIFO_SIZE;
mutex_init(&mdev_state->rxtx_lock);
- mdev_state->vconfig = kzalloc(MTTY_CONFIG_SPACE_SIZE, GFP_KERNEL);
- if (mdev_state->vconfig == NULL) {
+ mdev_state->vconfig = kzalloc(MTTY_CONFIG_SPACE_SIZE, GFP_KERNEL);
+ if (!mdev_state->vconfig) {
ret = -ENOMEM;
- goto err_state;
+ goto err_nr_ports;
}
mutex_init(&mdev_state->ops_lock);
mdev_state->mdev = mdev;
-
mtty_create_config_space(mdev_state);
+ return 0;
+
+err_nr_ports:
+ atomic_add(nr_ports, &mdev_avail_ports);
+ return ret;
+}
+
+static int mtty_probe(struct mdev_device *mdev)
+{
+ struct mdev_state *mdev_state;
+ int ret;
+
+ mdev_state = vfio_alloc_device(mdev_state, vdev, &mdev->dev,
+ &mtty_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_vconfig;
+ goto err_put_vdev;
dev_set_drvdata(&mdev->dev, mdev_state);
return 0;
-err_vconfig:
- kfree(mdev_state->vconfig);
-err_state:
- vfio_uninit_group_dev(&mdev_state->vdev);
- kfree(mdev_state);
-err_nr_ports:
- atomic_add(nr_ports, &mdev_avail_ports);
+err_put_vdev:
+ vfio_put_device(&mdev_state->vdev);
return ret;
}
+static void mtty_release_dev(struct vfio_device *vdev)
+{
+ struct mdev_state *mdev_state =
+ container_of(vdev, struct mdev_state, vdev);
+
+ atomic_add(mdev_state->nr_ports, &mdev_avail_ports);
+ kfree(mdev_state->vconfig);
+ vfio_free_device(vdev);
+}
+
static void mtty_remove(struct mdev_device *mdev)
{
struct mdev_state *mdev_state = dev_get_drvdata(&mdev->dev);
- int nr_ports = mdev_state->nr_ports;
vfio_unregister_group_dev(&mdev_state->vdev);
-
- kfree(mdev_state->vconfig);
- vfio_uninit_group_dev(&mdev_state->vdev);
- kfree(mdev_state);
- atomic_add(nr_ports, &mdev_avail_ports);
+ vfio_put_device(&mdev_state->vdev);
}
static int mtty_reset(struct mdev_state *mdev_state)
@@ -1287,6 +1296,8 @@ static struct attribute_group *mdev_type_groups[] = {
static const struct vfio_device_ops mtty_dev_ops = {
.name = "vfio-mtty",
+ .init = mtty_init_dev,
+ .release = mtty_release_dev,
.read = mtty_read,
.write = mtty_write,
.ioctl = mtty_ioctl,