libipathverbs is a userspace driver for QLogic InfiniBand HCAs. It is a plug-in module for libibverbs that allows programs to use QLogic hardware. See the libibverbs package for more information.
Development sources for libipathverbs are managed with git. The "official" upstream git tree for libipathverbs is git://git.kernel.org/~ralphc/libipathverbs/.git
The latest stable release is libipathverbs-1.1.tar.gz, with sha1sum b8e98240c878f93bfb48213aad290293e5b8695a, released on June 13, 2008.