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vfio/mdpy: Use the new device life cycle helpers

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and manage mdpy_count 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/20220921104401.38898-6-kevin.tian@intel.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Yi Liu 2022-09-21 18:43:51 +08:00 committed by Alex Williamson
parent 27aeb91559
commit 603c09f287
1 changed files with 48 additions and 35 deletions
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83
samples/vfio-mdev/mdpy.c
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@ -216,63 +216,79 @@ static int mdpy_reset(struct mdev_state *mdev_state)
return 0;
}
static int mdpy_probe(struct mdev_device *mdev)
static int mdpy_init_dev(struct vfio_device *vdev)
{
struct mdev_state *mdev_state =
container_of(vdev, struct mdev_state, vdev);
struct mdev_device *mdev = to_mdev_device(vdev->dev);
const struct mdpy_type *type =
&mdpy_types[mdev_get_type_group_id(mdev)];
struct device *dev = mdev_dev(mdev);
struct mdev_state *mdev_state;
u32 fbsize;
int ret;
int ret = -ENOMEM;
if (mdpy_count >= max_devices)
return -ENOMEM;
mdev_state = kzalloc(sizeof(struct mdev_state), GFP_KERNEL);
if (mdev_state == NULL)
return -ENOMEM;
vfio_init_group_dev(&mdev_state->vdev, &mdev->dev, &mdpy_dev_ops);
return ret;
mdev_state->vconfig = kzalloc(MDPY_CONFIG_SPACE_SIZE, GFP_KERNEL);
if (mdev_state->vconfig == NULL) {
ret = -ENOMEM;
goto err_state;
}
if (!mdev_state->vconfig)
return ret;
fbsize = roundup_pow_of_two(type->width * type->height * type->bytepp);
mdev_state->memblk = vmalloc_user(fbsize);
if (!mdev_state->memblk) {
ret = -ENOMEM;
goto err_vconfig;
}
dev_info(dev, "%s: %s (%dx%d)\n", __func__, type->name, type->width,
type->height);
if (!mdev_state->memblk)
goto out_vconfig;
mutex_init(&mdev_state->ops_lock);
mdev_state->mdev = mdev;
mdev_state->type = type;
mdev_state->type = type;
mdev_state->memsize = fbsize;
mdpy_create_config_space(mdev_state);
mdpy_reset(mdev_state);
dev_info(vdev->dev, "%s: %s (%dx%d)\n", __func__, type->name, type->width,
type->height);
mdpy_count++;
return 0;
out_vconfig:
kfree(mdev_state->vconfig);
return ret;
}
static int mdpy_probe(struct mdev_device *mdev)
{
struct mdev_state *mdev_state;
int ret;
mdev_state = vfio_alloc_device(mdev_state, vdev, &mdev->dev,
&mdpy_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:
vfree(mdev_state->memblk);
err_vconfig:
kfree(mdev_state->vconfig);
err_state:
vfio_uninit_group_dev(&mdev_state->vdev);
kfree(mdev_state);
err_put_vdev:
vfio_put_device(&mdev_state->vdev);
return ret;
}
static void mdpy_release_dev(struct vfio_device *vdev)
{
struct mdev_state *mdev_state =
container_of(vdev, struct mdev_state, vdev);
mdpy_count--;
vfree(mdev_state->memblk);
kfree(mdev_state->vconfig);
vfio_free_device(vdev);
}
static void mdpy_remove(struct mdev_device *mdev)
{
struct mdev_state *mdev_state = dev_get_drvdata(&mdev->dev);
@ -280,12 +296,7 @@ static void mdpy_remove(struct mdev_device *mdev)
dev_info(&mdev->dev, "%s\n", __func__);
vfio_unregister_group_dev(&mdev_state->vdev);
vfree(mdev_state->memblk);
kfree(mdev_state->vconfig);
vfio_uninit_group_dev(&mdev_state->vdev);
kfree(mdev_state);
mdpy_count--;
vfio_put_device(&mdev_state->vdev);
}
static ssize_t mdpy_read(struct vfio_device *vdev, char __user *buf,
@ -708,6 +719,8 @@ static struct attribute_group *mdev_type_groups[] = {
};
static const struct vfio_device_ops mdpy_dev_ops = {
.init = mdpy_init_dev,
.release = mdpy_release_dev,
.read = mdpy_read,
.write = mdpy_write,
.ioctl = mdpy_ioctl,