Object create and destroy were implemented specifically for dev parts device objects. Create general purpose APIs for use by upper layer drivers.
Signed-off-by: Daniel Jurgens <[email protected]> Reviewed-by: Parav Pandit <[email protected]> Reviewed-by: Xuan Zhuo <[email protected]> --- v4: Moved this logic from virtio_pci_modern to new file virtio_admin_commands. v5: Added missing params, and synced names in comments (Alok Tiwari) --- drivers/virtio/virtio_admin_commands.c | 75 ++++++++++++++++++++++++++ include/linux/virtio_admin.h | 44 +++++++++++++++ 2 files changed, 119 insertions(+) diff --git a/drivers/virtio/virtio_admin_commands.c b/drivers/virtio/virtio_admin_commands.c index 94751d16b3c4..2b80548ba3bc 100644 --- a/drivers/virtio/virtio_admin_commands.c +++ b/drivers/virtio/virtio_admin_commands.c @@ -88,3 +88,78 @@ int virtio_admin_cap_set(struct virtio_device *vdev, return err; } EXPORT_SYMBOL_GPL(virtio_admin_cap_set); + +int virtio_admin_obj_create(struct virtio_device *vdev, + u16 obj_type, + u32 obj_id, + u16 group_type, + u64 group_member_id, + const void *obj_specific_data, + size_t obj_specific_data_size) +{ + size_t data_size = sizeof(struct virtio_admin_cmd_resource_obj_create_data); + struct virtio_admin_cmd_resource_obj_create_data *obj_create_data; + struct virtio_admin_cmd cmd = {}; + struct scatterlist data_sg; + void *data; + int err; + + if (!vdev->config->admin_cmd_exec) + return -EOPNOTSUPP; + + data_size += obj_specific_data_size; + data = kzalloc(data_size, GFP_KERNEL); + if (!data) + return -ENOMEM; + + obj_create_data = data; + obj_create_data->hdr.type = cpu_to_le16(obj_type); + obj_create_data->hdr.id = cpu_to_le32(obj_id); + memcpy(obj_create_data->resource_obj_specific_data, obj_specific_data, + obj_specific_data_size); + sg_init_one(&data_sg, data, data_size); + + cmd.opcode = cpu_to_le16(VIRTIO_ADMIN_CMD_RESOURCE_OBJ_CREATE); + cmd.group_type = cpu_to_le16(group_type); + cmd.group_member_id = cpu_to_le64(group_member_id); + cmd.data_sg = &data_sg; + + err = vdev->config->admin_cmd_exec(vdev, &cmd); + kfree(data); + + return err; +} +EXPORT_SYMBOL_GPL(virtio_admin_obj_create); + +int virtio_admin_obj_destroy(struct virtio_device *vdev, + u16 obj_type, + u32 obj_id, + u16 group_type, + u64 group_member_id) +{ + struct virtio_admin_cmd_resource_obj_cmd_hdr *data; + struct virtio_admin_cmd cmd = {}; + struct scatterlist data_sg; + int err; + + if (!vdev->config->admin_cmd_exec) + return -EOPNOTSUPP; + + data = kzalloc(sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->type = cpu_to_le16(obj_type); + data->id = cpu_to_le32(obj_id); + sg_init_one(&data_sg, data, sizeof(*data)); + cmd.opcode = cpu_to_le16(VIRTIO_ADMIN_CMD_RESOURCE_OBJ_DESTROY); + cmd.group_type = cpu_to_le16(group_type); + cmd.group_member_id = cpu_to_le64(group_member_id); + cmd.data_sg = &data_sg; + + err = vdev->config->admin_cmd_exec(vdev, &cmd); + kfree(data); + + return err; +} +EXPORT_SYMBOL_GPL(virtio_admin_obj_destroy); diff --git a/include/linux/virtio_admin.h b/include/linux/virtio_admin.h index 36df97b6487a..039b996f73ec 100644 --- a/include/linux/virtio_admin.h +++ b/include/linux/virtio_admin.h @@ -77,4 +77,48 @@ int virtio_admin_cap_set(struct virtio_device *vdev, const void *caps, size_t cap_size); +/** + * virtio_admin_obj_create - Create an object on a virtio device + * @vdev: the virtio device + * @obj_type: type of object to create + * @obj_id: ID for the new object + * @group_type: administrative group type for the operation + * @group_member_id: member identifier within the administrative group + * @obj_specific_data: object-specific data for creation + * @obj_specific_data_size: size of the object-specific data in bytes + * + * Creates a new object on the virtio device with the specified type and ID. + * The object may require object-specific data for proper initialization. + * + * Return: 0 on success, -EOPNOTSUPP if the device doesn't support admin + * operations or object creation, or a negative error code on other failures. + */ +int virtio_admin_obj_create(struct virtio_device *vdev, + u16 obj_type, + u32 obj_id, + u16 group_type, + u64 group_member_id, + const void *obj_specific_data, + size_t obj_specific_data_size); + +/** + * virtio_admin_obj_destroy - Destroy an object on a virtio device + * @vdev: the virtio device + * @obj_type: type of object to destroy + * @obj_id: ID of the object to destroy + * @group_type: administrative group type for the operation + * @group_member_id: member identifier within the administrative group + * + * Destroys an existing object on the virtio device with the specified type + * and ID. + * + * Return: 0 on success, -EOPNOTSUPP if the device doesn't support admin + * operations or object destruction, or a negative error code on other failures. + */ +int virtio_admin_obj_destroy(struct virtio_device *vdev, + u16 obj_type, + u32 obj_id, + u16 group_type, + u64 group_member_id); + #endif /* _LINUX_VIRTIO_ADMIN_H */ -- 2.50.1
