diff options
Diffstat (limited to 'Documentation/networking')
| -rw-r--r-- | Documentation/networking/igb.txt | 132 | ||||
| -rw-r--r-- | Documentation/networking/igbvf.txt | 78 |
2 files changed, 210 insertions, 0 deletions
diff --git a/Documentation/networking/igb.txt b/Documentation/networking/igb.txt new file mode 100644 index 000000000000..ab2d71831892 --- /dev/null +++ b/Documentation/networking/igb.txt @@ -0,0 +1,132 @@ +Linux* Base Driver for Intel(R) Network Connection +================================================== + +Intel Gigabit Linux driver. +Copyright(c) 1999 - 2010 Intel Corporation. + +Contents +======== + +- Identifying Your Adapter +- Additional Configurations +- Support + +Identifying Your Adapter +======================== + +This driver supports all 82575, 82576 and 82580-based Intel (R) gigabit network +connections. + +For specific information on how to identify your adapter, go to the Adapter & +Driver ID Guide at: + + http://support.intel.com/support/go/network/adapter/idguide.htm + +Command Line Parameters +======================= + +The default value for each parameter is generally the recommended setting, +unless otherwise noted. + +max_vfs +------- +Valid Range: 0-7 +Default Value: 0 + +This parameter adds support for SR-IOV. It causes the driver to spawn up to +max_vfs worth of virtual function. + +Additional Configurations +========================= + + Jumbo Frames + ------------ + Jumbo Frames support is enabled by changing the MTU to a value larger than + the default of 1500. Use the ifconfig command to increase the MTU size. + For example: + + ifconfig eth<x> mtu 9000 up + + This setting is not saved across reboots. + + Notes: + + - The maximum MTU setting for Jumbo Frames is 9216. This value coincides + with the maximum Jumbo Frames size of 9234 bytes. + + - Using Jumbo Frames at 10 or 100 Mbps may result in poor performance or + loss of link. + + Ethtool + ------- + The driver utilizes the ethtool interface for driver configuration and + diagnostics, as well as displaying statistical information. + + http://sourceforge.net/projects/gkernel. + + Enabling Wake on LAN* (WoL) + --------------------------- + WoL is configured through the Ethtool* utility. + + For instructions on enabling WoL with Ethtool, refer to the Ethtool man page. + + WoL will be enabled on the system during the next shut down or reboot. + For this driver version, in order to enable WoL, the igb driver must be + loaded when shutting down or rebooting the system. + + Wake On LAN is only supported on port A of multi-port adapters. + + Wake On LAN is not supported for the Intel(R) Gigabit VT Quad Port Server + Adapter. + + Multiqueue + ---------- + In this mode, a separate MSI-X vector is allocated for each queue and one + for "other" interrupts such as link status change and errors. All + interrupts are throttled via interrupt moderation. Interrupt moderation + must be used to avoid interrupt storms while the driver is processing one + interrupt. The moderation value should be at least as large as the expected + time for the driver to process an interrupt. Multiqueue is off by default. + + REQUIREMENTS: MSI-X support is required for Multiqueue. If MSI-X is not + found, the system will fallback to MSI or to Legacy interrupts. + + LRO + --- + Large Receive Offload (LRO) is a technique for increasing inbound throughput + of high-bandwidth network connections by reducing CPU overhead. It works by + aggregating multiple incoming packets from a single stream into a larger + buffer before they are passed higher up the networking stack, thus reducing + the number of packets that have to be processed. LRO combines multiple + Ethernet frames into a single receive in the stack, thereby potentially + decreasing CPU utilization for receives. + + NOTE: You need to have inet_lro enabled via either the CONFIG_INET_LRO or + CONFIG_INET_LRO_MODULE kernel config option. Additionally, if + CONFIG_INET_LRO_MODULE is used, the inet_lro module needs to be loaded + before the igb driver. + + You can verify that the driver is using LRO by looking at these counters in + Ethtool: + + lro_aggregated - count of total packets that were combined + lro_flushed - counts the number of packets flushed out of LRO + lro_no_desc - counts the number of times an LRO descriptor was not available + for the LRO packet + + NOTE: IPv6 and UDP are not supported by LRO. + +Support +======= + +For general information, go to the Intel support website at: + + www.intel.com/support/ + +or the Intel Wired Networking project hosted by Sourceforge at: + + http://sourceforge.net/projects/e1000 + +If an issue is identified with the released source code on the supported +kernel with a supported adapter, email the specific information related +to the issue to e1000-devel@lists.sf.net diff --git a/Documentation/networking/igbvf.txt b/Documentation/networking/igbvf.txt new file mode 100644 index 000000000000..056028138d9c --- /dev/null +++ b/Documentation/networking/igbvf.txt @@ -0,0 +1,78 @@ +Linux* Base Driver for Intel(R) Network Connection +================================================== + +Intel Gigabit Linux driver. +Copyright(c) 1999 - 2010 Intel Corporation. + +Contents +======== + +- Identifying Your Adapter +- Additional Configurations +- Support + +This file describes the igbvf Linux* Base Driver for Intel Network Connection. + +The igbvf driver supports 82576-based virtual function devices that can only +be activated on kernels that support SR-IOV. SR-IOV requires the correct +platform and OS support. + +The igbvf driver requires the igb driver, version 2.0 or later. The igbvf +driver supports virtual functions generated by the igb driver with a max_vfs +value of 1 or greater. For more information on the max_vfs parameter refer +to the README included with the igb driver. + +The guest OS loading the igbvf driver must support MSI-X interrupts. + +This driver is only supported as a loadable module at this time. Intel is +not supplying patches against the kernel source to allow for static linking +of the driver. For questions related to hardware requirements, refer to the +documentation supplied with your Intel Gigabit adapter. All hardware +requirements listed apply to use with Linux. + +Instructions on updating ethtool can be found in the section "Additional +Configurations" later in this document. + +VLANs: There is a limit of a total of 32 shared VLANs to 1 or more VFs. + +Identifying Your Adapter +======================== + +The igbvf driver supports 82576-based virtual function devices that can only +be activated on kernels that support SR-IOV. + +For more information on how to identify your adapter, go to the Adapter & +Driver ID Guide at: + + http://support.intel.com/support/go/network/adapter/idguide.htm + +For the latest Intel network drivers for Linux, refer to the following +website. In the search field, enter your adapter name or type, or use the +networking link on the left to search for your adapter: + + http://downloadcenter.intel.com/scripts-df-external/Support_Intel.aspx + +Additional Configurations +========================= + + Ethtool + ------- + The driver utilizes the ethtool interface for driver configuration and + diagnostics, as well as displaying statistical information. + + http://sourceforge.net/projects/gkernel. + +Support +======= + +For general information, go to the Intel support website at: + + http://support.intel.com + +or the Intel Wired Networking project hosted by Sourceforge at: + + http://sourceforge.net/projects/e1000 + +If an issue is identified with the released source code on the supported +kernel with a supported adapter, email the specific information related +to the issue to e1000-devel@lists.sf.net |