The
satalink driver supports the Silicon Image SATALink 3112 2-port and 3114 4-port Serial ATA controllers, and provides the interface with the hardware for the
ata(4) driver.
The 0x0002 flag forces the
satalink driver to disable DMA on chipsets for which DMA would normally be enabled. This can be used as a debugging aid, or to work around problems where the SATA controller is wired up to the system incorrectly.