search for: mdev_device_create

...* @dev: device structure representing parent device. > * @ops: Parent device operation structure to be registered. > + * @id: class id. > * > * Add device to list of registered parent devices. > * Returns a negative value on error, otherwise 0. > @@ -324,6 +331,9 @@ int mdev_device_create(struct kobject *kobj, > if (ret) > goto ops_create_fail; > > + if (!mdev->class_id) This is a sanity test failure of the parent driver on a privileged path, I think it's fair to print a warning when this occurs rather than only return an errno to the user. In fact, ret i...

...ter_device : Register a device * @dev: device structure representing parent device. * @ops: Parent device operation structure to be registered. + * @id: class id. * * Add device to list of registered parent devices. * Returns a negative value on error, otherwise 0. @@ -324,6 +331,9 @@ int mdev_device_create(struct kobject *kobj, if (ret) goto ops_create_fail; + if (!mdev->class_id) + goto class_id_fail; + ret = device_add(&mdev->dev); if (ret) goto add_fail; @@ -340,6 +350,7 @@ int mdev_device_create(struct kobject *kobj, sysfs_fail: device_del(&mdev->dev); +class_...

...mdev_driver *mdrv = to_mdev_driver(drv); > + const struct mdev_class_id *ids = mdrv->id_table; > + > + for (i = 0; ids[i].id; i++) > + if (ids[i].id == mdev->class_id) With the proposed API here, mdev->class_id can be NULL, do we allow devices to exist in that state or should mdev_device_create() generate an error if the .create() callback doesn't register a type? Or a warn_once and assume MDEV_ID_VFIO? The latter seems pretty sketchy when we get to patch 5/8. Thanks, Alex > + return 1; > + return 0; > +} > + > struct bus_type mdev_bus_type = { > .name = &...

...representing parent device. >> * @ops: Parent device operation structure to be registered. >> + * @id: class id. >> * >> * Add device to list of registered parent devices. >> * Returns a negative value on error, otherwise 0. >> @@ -324,6 +331,9 @@ int mdev_device_create(struct kobject *kobj, >> if (ret) >> goto ops_create_fail; >> >> + if (!mdev->class_id) >> + goto class_id_fail; >> + >> ret = device_add(&mdev->dev); >> if (ret) >> goto add_fail; >> @@ -340,6 +350,7 @@ int mde...

...; >> * @ops: Parent device operation structure to be registered. > >> + * @id: class id. > >> * > >> * Add device to list of registered parent devices. > >> * Returns a negative value on error, otherwise 0. > >> @@ -324,6 +335,13 @@ int mdev_device_create(struct kobject *kobj, > >> if (ret) > >> goto ops_create_fail; > >> > >> + if (!mdev->class_id) { > >> + ret = -EINVAL; > >> + WARN(1, "class id must be specified for device %s\n", > >> + dev_name(dev));...

...; >> * @ops: Parent device operation structure to be registered. > >> + * @id: class id. > >> * > >> * Add device to list of registered parent devices. > >> * Returns a negative value on error, otherwise 0. > >> @@ -324,6 +335,13 @@ int mdev_device_create(struct kobject *kobj, > >> if (ret) > >> goto ops_create_fail; > >> > >> + if (!mdev->class_id) { > >> + ret = -EINVAL; > >> + WARN(1, "class id must be specified for device %s\n", > >> + dev_name(dev));...

...* @dev: device structure representing parent device. > * @ops: Parent device operation structure to be registered. > + * @id: class id. > * > * Add device to list of registered parent devices. > * Returns a negative value on error, otherwise 0. > @@ -324,6 +335,13 @@ int mdev_device_create(struct kobject *kobj, > if (ret) > goto ops_create_fail; > > + if (!mdev->class_id) { > + ret = -EINVAL; > + WARN(1, "class id must be specified for device %s\n", > + dev_name(dev)); Nit, dev_warn(dev, "mdev vendor driver failed to specify devi...

...* @dev: device structure representing parent device. > * @ops: Parent device operation structure to be registered. > + * @id: class id. > * > * Add device to list of registered parent devices. > * Returns a negative value on error, otherwise 0. > @@ -324,6 +335,13 @@ int mdev_device_create(struct kobject *kobj, > if (ret) > goto ops_create_fail; > > + if (!mdev->class_id) { > + ret = -EINVAL; > + WARN(1, "class id must be specified for device %s\n", > + dev_name(dev)); Nit, dev_warn(dev, "mdev vendor driver failed to specify devi...

...ent device operation structure to be registered. > > >> + * @id: class id. > > >> * > > >> * Add device to list of registered parent devices. > > >> * Returns a negative value on error, otherwise 0. > > >> @@ -324,6 +335,13 @@ int mdev_device_create(struct kobject *kobj, > > >> if (ret) > > >> goto ops_create_fail; > > >> > > >> + if (!mdev->class_id) { > > >> + ret = -EINVAL; > > >> + WARN(1, "class id must be specified for device %s\n", > >...

...called during + * create() callback. + */ +void mdev_set_class(struct mdev_device *mdev, u16 id) +{ + WARN_ON(mdev->class_id); + mdev->class_id = id; +} +EXPORT_SYMBOL(mdev_set_class); + struct device *mdev_dev(struct mdev_device *mdev) { return &mdev->dev; @@ -324,6 +335,12 @@ int mdev_device_create(struct kobject *kobj, if (ret) goto ops_create_fail; + if (!mdev->class_id) { + ret = -EINVAL; + dev_warn(dev, "mdev vendor driver failed to specify device class\n"); + goto add_fail; + } + ret = device_add(&mdev->dev); if (ret) goto add_fail; diff --git a/drive...

...called during + * create() callback. + */ +void mdev_set_class(struct mdev_device *mdev, u16 id) +{ + WARN_ON(mdev->class_id); + mdev->class_id = id; +} +EXPORT_SYMBOL(mdev_set_class); + struct device *mdev_dev(struct mdev_device *mdev) { return &mdev->dev; @@ -324,6 +334,12 @@ int mdev_device_create(struct kobject *kobj, if (ret) goto ops_create_fail; + if (!mdev->class_id) { + ret = -EINVAL; + dev_warn(dev, "mdev vendor driver failed to specify device class\n"); + goto add_fail; + } + ret = device_add(&mdev->dev); if (ret) goto add_fail; diff --git a/drive...

...er_device : Register a device * @dev: device structure representing parent device. * @ops: Parent device operation structure to be registered. + * @id: class id. * * Add device to list of registered parent devices. * Returns a negative value on error, otherwise 0. @@ -324,6 +335,13 @@ int mdev_device_create(struct kobject *kobj, if (ret) goto ops_create_fail; + if (!mdev->class_id) { + ret = -EINVAL; + WARN(1, "class id must be specified for device %s\n", + dev_name(dev)); + goto add_fail; + } + ret = device_add(&mdev->dev); if (ret) goto add_fail; diff --git...

...epresenting parent device. >> * @ops: Parent device operation structure to be registered. >> + * @id: class id. >> * >> * Add device to list of registered parent devices. >> * Returns a negative value on error, otherwise 0. >> @@ -324,6 +335,13 @@ int mdev_device_create(struct kobject *kobj, >> if (ret) >> goto ops_create_fail; >> >> + if (!mdev->class_id) { >> + ret = -EINVAL; >> + WARN(1, "class id must be specified for device %s\n", >> + dev_name(dev)); > Nit, dev_warn(dev, "mdev v...

Hi all: There are hardware that can do virtio datapath offloading while having its own control path. This path tries to implement a mdev based unified API to support using kernel virtio driver to drive those devices. This is done by introducing a new mdev transport for virtio (virtio_mdev) and register itself as a new kind of mdev driver. Then it provides a unified way for kernel virtio driver to

Hi all: There are hardware that can do virtio datapath offloading while having its own control path. This path tries to implement a mdev based unified API to support using kernel virtio driver to drive those devices. This is done by introducing a new mdev transport for virtio (virtio_mdev) and register itself as a new kind of mdev driver. Then it provides a unified way for kernel virtio driver to

...ev_set_class(struct mdev_device *mdev, u16 id) > +{ > + WARN_ON(mdev->class_id); > + mdev->class_id = id; > +} > +EXPORT_SYMBOL(mdev_set_class); > + > struct device *mdev_dev(struct mdev_device *mdev) > { > return &mdev->dev; > @@ -324,6 +334,12 @@ int mdev_device_create(struct kobject *kobj, > if (ret) > goto ops_create_fail; > > + if (!mdev->class_id) { > + ret = -EINVAL; > + dev_warn(dev, "mdev vendor driver failed to specify device class\n"); > + goto add_fail; > + } > + > ret = device_add(&mdev->dev...

Hi all: There are hardwares that can do virtio datapath offloading while having its own control path. This path tries to implement a mdev based unified API to support using kernel virtio driver to drive those devices. This is done by introducing a new mdev transport for virtio (virtio_mdev) and register itself as a new kind of mdev driver. Then it provides a unified way for kernel virtio driver

Hi all: There are hardwares that can do virtio datapath offloading while having its own control path. This path tries to implement a mdev based unified API to support using kernel virtio driver to drive those devices. This is done by introducing a new mdev transport for virtio (virtio_mdev) and register itself as a new kind of mdev driver. Then it provides a unified way for kernel virtio driver

Hi all: There are hardwares that can do virtio datapath offloading while having its own control path. This path tries to implement a mdev based unified API to support using kernel virtio driver to drive those devices. This is done by introducing a new mdev transport for virtio (virtio_mdev) and register itself as a new kind of mdev driver. Then it provides a unified way for kernel virtio driver

On Tue, 24 Sep 2019 21:53:29 +0800 Jason Wang <jasowang at redhat.com> wrote: > Currently, except for the create and remove, the rest of > mdev_parent_ops is designed for vfio-mdev driver only and may not help > for kernel mdev driver. With the help of class id, this patch > introduces device specific callbacks inside mdev_device > structure. This allows different set of