← ixy tour22 files7,003 lines

The whole ixy repo

Not excerpts — the actual source, every file, syntax-highlighted, with a diagram and a one-line orientation up top. This is the complete emmericp/ixy driver (BSD-licensed, © 2017 Paul Emmerich). Read it in the order below — it's designed to be read start to finish.

src/app/ — example applications

ixy-fwd.cThe forwarding example — the whole datapath is this poll loop.68 linesixy-pktgen.cPacket generator: build a frame once, blast it in batches.113 linesixy-pcap.cCapture received packets to a pcap file.87 lines

src/driver/ — the NIC drivers

device.hThe generic struct ixy_device vtable and the MMIO register helpers.183 linesdevice.cixy_init(): read PCI config, then install ixgbe or virtio callbacks.29 linesixgbe.cThe ixgbe driver: bring-up plus the RX/TX batch hot paths.823 linesixgbe.hixgbe device struct and the public ixgbe_* entry points.27 linesixgbe_type.hIntel 82599 register map and descriptor formats (mostly #defines).3984 linesvirtio.cThe virtio driver — same vtable, virtqueue avail/used rings.483 linesvirtio.hvirtio device struct.30 linesvirtio_type.hvirtio-net register and virtqueue definitions.276 lines

src/ — core (memory, pci, interrupts, vfio, stats)

memory.cDMA memory: hugepages, virt_to_phys, and the packet-buffer mempool.155 linesmemory.hstruct pkt_buf and struct mempool — the 64-byte buffer header.61 linespci.cPCI: unbind the kernel driver, set bus-master, mmap BAR0.62 linespci.hPCI helper declarations.14 linesinterrupts.cOptional interrupt handling over a VFIO eventfd + epoll.47 linesinterrupts.hInterrupt state structs and timing.41 lineslibixy-vfio.cVFIO / IOMMU: groups, containers, and IOVA DMA mappings.328 lineslibixy-vfio.hVFIO entry-point declarations.39 linesstats.cPer-device packet/byte counters and rate printing.53 linesstats.hDevice stats structs.26 lineslog.hLogging, error, and hexdump macros.74 lines
← The tour
ixy, explained with diagrams
The model →
Ring buffers in the NIC datapath