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-1.2.tar.gz, with sha1sum 462c07f85b4d568ef72846865ee48ba0af4bb015, released on Nov. 17, 2009.