diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-10 00:05:52 -0400 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-10 00:05:52 -0400 |
commit | f6cec0ae58c17522a7bc4e2f39dae19f199ab534 (patch) | |
tree | 496cf6f53b0c75d9ae57bd0e411c5d2f6cea5cbb /Documentation/networking | |
parent | 0fcf12d510b6d1b1b090a090c62009310eca4be4 (diff) | |
parent | c4e9b56e24422e71424b24eee27c2b134a191d7b (diff) |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (59 commits)
igbvf.txt: Add igbvf Documentation
igb.txt: Add igb documentation
e100/e1000*/igb*/ixgb*: Add missing read memory barrier
ixgbe: fix build error with FCOE_CONFIG without DCB_CONFIG
netxen: protect tx timeout recovery by rtnl lock
isdn: gigaset: use after free
isdn: gigaset: add missing unlock
solos-pci: Fix race condition in tasklet RX handling
pkt_sched: Fix sch_sfq vs tcf_bind_filter oops
net: disable preemption before call smp_processor_id()
tcp: no md5sig option size check bug
iwlwifi: fix locking assertions
iwlwifi: fix TX tracer
isdn: fix information leak
net: Fix napi_gro_frags vs netpoll path
usbnet: remove noisy and hardly useful printk
rtl8180: avoid potential NULL deref in rtl8180_beacon_work
ath9k: Remove myself from the MAINTAINERS list
libertas: scan before assocation if no BSSID was given
libertas: fix association with some APs by using extended rates
...
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 @@ | |||
1 | Linux* Base Driver for Intel(R) Network Connection | ||
2 | ================================================== | ||
3 | |||
4 | Intel Gigabit Linux driver. | ||
5 | Copyright(c) 1999 - 2010 Intel Corporation. | ||
6 | |||
7 | Contents | ||
8 | ======== | ||
9 | |||
10 | - Identifying Your Adapter | ||
11 | - Additional Configurations | ||
12 | - Support | ||
13 | |||
14 | Identifying Your Adapter | ||
15 | ======================== | ||
16 | |||
17 | This driver supports all 82575, 82576 and 82580-based Intel (R) gigabit network | ||
18 | connections. | ||
19 | |||
20 | For specific information on how to identify your adapter, go to the Adapter & | ||
21 | Driver ID Guide at: | ||
22 | |||
23 | http://support.intel.com/support/go/network/adapter/idguide.htm | ||
24 | |||
25 | Command Line Parameters | ||
26 | ======================= | ||
27 | |||
28 | The default value for each parameter is generally the recommended setting, | ||
29 | unless otherwise noted. | ||
30 | |||
31 | max_vfs | ||
32 | ------- | ||
33 | Valid Range: 0-7 | ||
34 | Default Value: 0 | ||
35 | |||
36 | This parameter adds support for SR-IOV. It causes the driver to spawn up to | ||
37 | max_vfs worth of virtual function. | ||
38 | |||
39 | Additional Configurations | ||
40 | ========================= | ||
41 | |||
42 | Jumbo Frames | ||
43 | ------------ | ||
44 | Jumbo Frames support is enabled by changing the MTU to a value larger than | ||
45 | the default of 1500. Use the ifconfig command to increase the MTU size. | ||
46 | For example: | ||
47 | |||
48 | ifconfig eth<x> mtu 9000 up | ||
49 | |||
50 | This setting is not saved across reboots. | ||
51 | |||
52 | Notes: | ||
53 | |||
54 | - The maximum MTU setting for Jumbo Frames is 9216. This value coincides | ||
55 | with the maximum Jumbo Frames size of 9234 bytes. | ||
56 | |||
57 | - Using Jumbo Frames at 10 or 100 Mbps may result in poor performance or | ||
58 | loss of link. | ||
59 | |||
60 | Ethtool | ||
61 | ------- | ||
62 | The driver utilizes the ethtool interface for driver configuration and | ||
63 | diagnostics, as well as displaying statistical information. | ||
64 | |||
65 | http://sourceforge.net/projects/gkernel. | ||
66 | |||
67 | Enabling Wake on LAN* (WoL) | ||
68 | --------------------------- | ||
69 | WoL is configured through the Ethtool* utility. | ||
70 | |||
71 | For instructions on enabling WoL with Ethtool, refer to the Ethtool man page. | ||
72 | |||
73 | WoL will be enabled on the system during the next shut down or reboot. | ||
74 | For this driver version, in order to enable WoL, the igb driver must be | ||
75 | loaded when shutting down or rebooting the system. | ||
76 | |||
77 | Wake On LAN is only supported on port A of multi-port adapters. | ||
78 | |||
79 | Wake On LAN is not supported for the Intel(R) Gigabit VT Quad Port Server | ||
80 | Adapter. | ||
81 | |||
82 | Multiqueue | ||
83 | ---------- | ||
84 | In this mode, a separate MSI-X vector is allocated for each queue and one | ||
85 | for "other" interrupts such as link status change and errors. All | ||
86 | interrupts are throttled via interrupt moderation. Interrupt moderation | ||
87 | must be used to avoid interrupt storms while the driver is processing one | ||
88 | interrupt. The moderation value should be at least as large as the expected | ||
89 | time for the driver to process an interrupt. Multiqueue is off by default. | ||
90 | |||
91 | REQUIREMENTS: MSI-X support is required for Multiqueue. If MSI-X is not | ||
92 | found, the system will fallback to MSI or to Legacy interrupts. | ||
93 | |||
94 | LRO | ||
95 | --- | ||
96 | Large Receive Offload (LRO) is a technique for increasing inbound throughput | ||
97 | of high-bandwidth network connections by reducing CPU overhead. It works by | ||
98 | aggregating multiple incoming packets from a single stream into a larger | ||
99 | buffer before they are passed higher up the networking stack, thus reducing | ||
100 | the number of packets that have to be processed. LRO combines multiple | ||
101 | Ethernet frames into a single receive in the stack, thereby potentially | ||
102 | decreasing CPU utilization for receives. | ||
103 | |||
104 | NOTE: You need to have inet_lro enabled via either the CONFIG_INET_LRO or | ||
105 | CONFIG_INET_LRO_MODULE kernel config option. Additionally, if | ||
106 | CONFIG_INET_LRO_MODULE is used, the inet_lro module needs to be loaded | ||
107 | before the igb driver. | ||
108 | |||
109 | You can verify that the driver is using LRO by looking at these counters in | ||
110 | Ethtool: | ||
111 | |||
112 | lro_aggregated - count of total packets that were combined | ||
113 | lro_flushed - counts the number of packets flushed out of LRO | ||
114 | lro_no_desc - counts the number of times an LRO descriptor was not available | ||
115 | for the LRO packet | ||
116 | |||
117 | NOTE: IPv6 and UDP are not supported by LRO. | ||
118 | |||
119 | Support | ||
120 | ======= | ||
121 | |||
122 | For general information, go to the Intel support website at: | ||
123 | |||
124 | www.intel.com/support/ | ||
125 | |||
126 | or the Intel Wired Networking project hosted by Sourceforge at: | ||
127 | |||
128 | http://sourceforge.net/projects/e1000 | ||
129 | |||
130 | If an issue is identified with the released source code on the supported | ||
131 | kernel with a supported adapter, email the specific information related | ||
132 | 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 @@ | |||
1 | Linux* Base Driver for Intel(R) Network Connection | ||
2 | ================================================== | ||
3 | |||
4 | Intel Gigabit Linux driver. | ||
5 | Copyright(c) 1999 - 2010 Intel Corporation. | ||
6 | |||
7 | Contents | ||
8 | ======== | ||
9 | |||
10 | - Identifying Your Adapter | ||
11 | - Additional Configurations | ||
12 | - Support | ||
13 | |||
14 | This file describes the igbvf Linux* Base Driver for Intel Network Connection. | ||
15 | |||
16 | The igbvf driver supports 82576-based virtual function devices that can only | ||
17 | be activated on kernels that support SR-IOV. SR-IOV requires the correct | ||
18 | platform and OS support. | ||
19 | |||
20 | The igbvf driver requires the igb driver, version 2.0 or later. The igbvf | ||
21 | driver supports virtual functions generated by the igb driver with a max_vfs | ||
22 | value of 1 or greater. For more information on the max_vfs parameter refer | ||
23 | to the README included with the igb driver. | ||
24 | |||
25 | The guest OS loading the igbvf driver must support MSI-X interrupts. | ||
26 | |||
27 | This driver is only supported as a loadable module at this time. Intel is | ||
28 | not supplying patches against the kernel source to allow for static linking | ||
29 | of the driver. For questions related to hardware requirements, refer to the | ||
30 | documentation supplied with your Intel Gigabit adapter. All hardware | ||
31 | requirements listed apply to use with Linux. | ||
32 | |||
33 | Instructions on updating ethtool can be found in the section "Additional | ||
34 | Configurations" later in this document. | ||
35 | |||
36 | VLANs: There is a limit of a total of 32 shared VLANs to 1 or more VFs. | ||
37 | |||
38 | Identifying Your Adapter | ||
39 | ======================== | ||
40 | |||
41 | The igbvf driver supports 82576-based virtual function devices that can only | ||
42 | be activated on kernels that support SR-IOV. | ||
43 | |||
44 | For more information on how to identify your adapter, go to the Adapter & | ||
45 | Driver ID Guide at: | ||
46 | |||
47 | http://support.intel.com/support/go/network/adapter/idguide.htm | ||
48 | |||
49 | For the latest Intel network drivers for Linux, refer to the following | ||
50 | website. In the search field, enter your adapter name or type, or use the | ||
51 | networking link on the left to search for your adapter: | ||
52 | |||
53 | http://downloadcenter.intel.com/scripts-df-external/Support_Intel.aspx | ||
54 | |||
55 | Additional Configurations | ||
56 | ========================= | ||
57 | |||
58 | Ethtool | ||
59 | ------- | ||
60 | The driver utilizes the ethtool interface for driver configuration and | ||
61 | diagnostics, as well as displaying statistical information. | ||
62 | |||
63 | http://sourceforge.net/projects/gkernel. | ||
64 | |||
65 | Support | ||
66 | ======= | ||
67 | |||
68 | For general information, go to the Intel support website at: | ||
69 | |||
70 | http://support.intel.com | ||
71 | |||
72 | or the Intel Wired Networking project hosted by Sourceforge at: | ||
73 | |||
74 | http://sourceforge.net/projects/e1000 | ||
75 | |||
76 | If an issue is identified with the released source code on the supported | ||
77 | kernel with a supported adapter, email the specific information related | ||
78 | to the issue to e1000-devel@lists.sf.net | ||