Jonathan Kim
5dfebdbca9
As the KFD IPC IOCTLs will not be upstreamed, change runtime implementation to use DMA bufs. DMA buf fds will be passed over abstract unix domain sockets. The exporter spins a thread that creates a socket server. The importer connects to the server to fetch the fd. libDRM will be required to do a manual import and GPU map for memory that is not already imported and mapped. For now, use the legacy IPC implementation by default as a follow on patch will disable the HSA_ENABLE_IPC_MODE_LEGACY environment variable. Change-Id: Ifd8469e9adfc81f8a1ea78d6010fb10b515ba1b4