How to generate a Commerce order from a CSV?
Im not sure how to make csv directly to order, but this should work:


create a node type, called "csv order" 
use Feeds module to fetch the data from csv to this node type
install module hook_post_action
write a custom module, which after saving node "csv order" would take data from this node, and create commerce order with line items
remove the csv order node if neccesary