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author | Yi Liu <yi.l.liu@intel.com> | 2022-09-21 18:43:51 +0800 |
---|---|---|
committer | Alex Williamson <alex.williamson@redhat.com> | 2022-09-21 14:15:10 -0600 |
commit | 603c09f2873d6e86dce636c9e5ae330e2c033940 (patch) | |
tree | 1e3b7fcf7262b8bf432e9d37e428c386934df139 /samples | |
parent | 27aeb915595b87165a3004aab05b2b837d01e6ed (diff) | |
download | lwn-603c09f2873d6e86dce636c9e5ae330e2c033940.tar.gz lwn-603c09f2873d6e86dce636c9e5ae330e2c033940.zip |
vfio/mdpy: Use the new device life cycle helpers
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>
Diffstat (limited to 'samples')
-rw-r--r-- | samples/vfio-mdev/mdpy.c | 81 |
1 files changed, 47 insertions, 34 deletions
diff --git a/samples/vfio-mdev/mdpy.c b/samples/vfio-mdev/mdpy.c index e8c46eb2e246..bb2af1ec0f7c 100644 --- a/samples/vfio-mdev/mdpy.c +++ b/samples/vfio-mdev/mdpy.c @@ -216,61 +216,77 @@ 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: + +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); -err_vconfig: kfree(mdev_state->vconfig); -err_state: - vfio_uninit_group_dev(&mdev_state->vdev); - kfree(mdev_state); - return ret; + vfio_free_device(vdev); } static void mdpy_remove(struct mdev_device *mdev) @@ -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, |