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GVE(4) FreeBSD Kernel Interfaces Manual GVE(4) NAME gve - Ethernet driver for Google Virtual NIC (gVNIC) SYNOPSIS To compile this driver into the kernel, place the following lines in your kernel configuration file: device gve Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5): if_gve_load="YES" DESCRIPTION gVNIC is a virtual network interface designed specifically for Google Compute Engine (GCE). It is required to support per-VM Tier-1 networking performance, and for using certain VM shapes on GCE. gve is the driver for gVNIC. It supports the following features: o RX checksum offload o TX chesksum offload o TCP Segmentation Offload (TSO) o Large Receive Offload (LRO) in software o Jumbo frames o Receive Side Scaling (RSS) For more information on configuring this device, see ifconfig(8). HARDWARE gve binds to a single PCI device ID presented by gVNIC: o 0x1AE0:0x0042 DIAGNOSTICS The following messages are recorded during driver initialization: Enabled MSIX with %d vectors Configured device resources Successfully attached %s Deconfigured device resources These messages are seen if driver initialization fails. Global (across- queues) allocation failures: Failed to configure device resources: err=%d No compatible queue formats Failed to allocate ifnet struct Failed to allocate admin queue mem Failed to alloc DMA mem for DescribeDevice Failed to allocate QPL page irq and BAR allocation failures: Failed to acquire any msix vectors Tried to acquire %d msix vectors, got only %d Rx queue-specific allocation failures: No QPL left for rx ring %d Failed to alloc queue resources for rx ring %d Failed to alloc desc ring for rx ring %d Failed to alloc data ring for rx ring %d Tx queue-specific allocation failures: No QPL left for tx ring %d Failed to alloc queue resources for tx ring %d Failed to alloc desc ring for tx ring %d Failed to vmap fifo, qpl_id = %d The following messages are recorded when the interface detach fails: Failed to deconfigure device resources: err=%d If bootverbose is on, the following messages are recorded when the interface is being brought up: Created %d rx queues Created %d tx queues MTU set to %d The following messages are recorded when the interface is being brought down: Destroyed %d rx queues Destroyed %d tx queues These messages are seen if errors are encountered when bringing the interface up or down: Failed to destroy rxq %d, err: %d Failed to destroy txq %d, err: %d Failed to create rxq %d, err: %d Failed to create txq %d, err: %d Failed to set MTU to %d Invalid new MTU setting. new mtu: %d max mtu: %d min mtu: %d Cannot bring the iface up when detached Reached max number of registered pages %lu > %lu Failed to init lro for rx ring %d These messages are seen if any admin queue command fails: AQ command(%u): failed with status %d AQ command(%u): unknown status code %d AQ commands timed out, need to reset AQ Unknown AQ command opcode %d These messages are recorded when the device is being reset due to an error: Scheduling reset task! Waiting until admin queue is released. Admin queue released Restore failed! These two messages correspoond to the NIC alerting the driver to link state changes: Device link is up. Device link is down. Apart from these messages, the driver exposes per-queue packet and error counters as sysctl nodes. Global (across queues) counters can be read using netstat(8). LIMITATIONS gve does not support the transmission of VLAN-tagged packets. All VLAN- tagged traffic is dropped. SUPPORT Please email gvnic-drivers@google.com with the specifics of the issue encountered. SEE ALSO ifconfig(8), netstat(8) HISTORY The gve device driver first appeared in FreeBSD 14.0. AUTHORS The gve driver was written by Google. FreeBSD 14.0-RELEASE-p6 April 26, 2023 FreeBSD 14.0-RELEASE-p6