The first working ARM System-on-Chip (SoC) GPU graphics driver built for Gallium3D has been merged into mainline Mesa! The driver that was merged into mainline Mesa is the Gallium3D Freedreno for Qualcomm Snapdragon/Adreno graphics hardware. This Freedreno Gallium3D driver initially supports the A220, which is the GPU that Qualcomm uses with its Snapdragon S3 SoC.
The Qualcomm Snapdragon with the APQ8060, MSM8260, and MSM8660 parts is found in devices like the HP TouchPad, Samsung Galaxy S II, Samasung Galaxy S Blaze 4G, ASUS Eee Pad Memo, HTC Sensation, Samsung Galaxy Note, and LG Optimus LTE. The Freedreno Gallium3D driver will eventually be expanded to fully support other non-A220 Adreno hardware, with Rob Clark recently beginning to play with other devices. The A3xx support may come via an extension to this current driver with a different compiler or as a new Freedreno Gallium3D driver.