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This patch implements the fence APIs required to synchronize DMAs. SCIF provides an interface to return a "mark" for all DMAs programmed at the instant the API was called. Users can then "wait" on the mark provided previously by blocking inside the kernel. Upon receipt of a DMA completion interrupt the waiting thread is woken up. There is also an interface to signal DMA completion by polling for a location to be updated via a "signal" cookie to avoid the interrupt overhead in the mark/wait interface. SCIF allows programming fences on both the local and the remote node for both the mark/wait or the fence signal APIs. Reviewed-by: Ashutosh Dixit <ashutosh.dixit@intel.com> Reviewed-by: Nikhil Rao <nikhil.rao@intel.com> Signed-off-by: Jacek Lawrynowicz <jacek.lawrynowicz@intel.com> Signed-off-by: Sudeep Dutt <sudeep.dutt@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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| .. | ||
| Makefile | ||
| scif_api.c | ||
| scif_debugfs.c | ||
| scif_dma.c | ||
| scif_epd.c | ||
| scif_epd.h | ||
| scif_fd.c | ||
| scif_fence.c | ||
| scif_main.c | ||
| scif_main.h | ||
| scif_map.h | ||
| scif_mmap.c | ||
| scif_nm.c | ||
| scif_nodeqp.c | ||
| scif_nodeqp.h | ||
| scif_peer_bus.c | ||
| scif_peer_bus.h | ||
| scif_ports.c | ||
| scif_rb.c | ||
| scif_rb.h | ||
| scif_rma_list.c | ||
| scif_rma_list.h | ||
| scif_rma.c | ||
| scif_rma.h | ||