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MXGE(4) Kernel Interfaces Manual MXGE(4) NAME mxge -- Myricom Myri10GE 10 Gigabit Ethernet adapter driver SYNOPSIS To compile this driver into the kernel, place the following lines in your kernel configuration file: device firmware device mxge Alternatively, to load the driver as a module at boot time, place the following lines in loader.conf(5): if_mxge_load="YES" mxge_ethp_z8e_load="YES" mxge_eth_z8e_load="YES" DESCRIPTION The mxge driver provides support for PCI Express 10 Gigabit Ethernet adapters based on the Myricom LANai Z8E chip. The driver supports Transmit/Receive checksum offload, Jumbo Frames as well as TCP segmen- tation offload (TSO). For further hardware information, see http://www.myri.com/. For questions related to hardware requirements, refer to the documenta- tion supplied with your Myri10GE adapter. All hardware requirements listed apply to use with FreeBSD. Support for Jumbo Frames is provided via the interface MTU setting. Selecting an MTU larger than 1500 bytes with the ifconfig(8) utility configures the adapter to receive and transmit Jumbo Frames. The maxi- mum MTU size for Jumbo Frames is 9000. For more information on configuring this device, see ifconfig(8). HARDWARE The mxge driver supports 10 Gigabit Ethernet adapters based on the Myricom LANai Z8E chips: • Myricom 10GBase-CX4 (10G-PCIE-8A-C, 10G-PCIE-8AL-C) • Myricom 10GBase-R (10G-PCIE-8A-R, 10G-PCIE-8AL-R) • Myricom 10G XAUI over ribbon fiber (10G-PCIE-8A-Q, 10G-PCIE-8AL-Q) LOADER TUNABLES Tunables can be set at the loader(8) prompt before booting the kernel or stored in loader.conf(5). hw.mxge.flow_control_enabled Whether or not hardware flow control is enabled on the adapter. The default value is 1. hw.mxge.intr_coal_delay This value delays the generation of all interrupts in units of 1 microsecond. The default value is 30. hw.mxge.skip_pio_read This value determines whether or not the driver may omit doing a pio read in the interrupt handler which ensures that the in- terrupt line has been deasserted when using xPIC interrupts. A non-zero value may result in lower CPU overhead, however it may also result in spurious interrupts. The default value is 0. DIAGNOSTICS mxge%d: Unable to allocate bus resource: memory A fatal initialization error has occurred. mxge%d: Unable to allocate bus resource: interrupt A fatal initializa- tion error has occurred. mxge%d: Could not find firmware image %s The appropriate firmware kld module was not installed. This is a fatal initialization error. SUPPORT For general information and support, go to the Myricom support website at: http://www.myri.com/scs/. If an issue is identified with the released source code on the sup- ported kernel with a supported adapter, email the specific information related to the issue to <help@myri.com>. SEE ALSO altq(4), arp(4), netintro(4), ng_ether(4), ifconfig(8) HISTORY The mxge device driver first appeared in FreeBSD 6.3. AUTHORS The mxge driver was written by Andrew Gallatin <gallatin@FreeBSD.org>. FreeBSD 7.0 September 15, 2006 MXGE(4)
NAME | SYNOPSIS | DESCRIPTION | HARDWARE | LOADER TUNABLES | DIAGNOSTICS | SUPPORT | SEE ALSO | HISTORY | AUTHORS
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