diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-20 20:43:29 -0400 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-20 20:43:29 -0400 |
commit | db6d8c7a4027b48d797b369a53f8470aaeed7063 (patch) | |
tree | e140c104a89abc2154e1f41a7db8ebecbb6fa0b4 /Documentation/networking | |
parent | 3a533374283aea50eab3976d8a6d30532175f009 (diff) | |
parent | fb65a7c091529bfffb1262515252c0d0f6241c5c (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: (1232 commits)
iucv: Fix bad merging.
net_sched: Add size table for qdiscs
net_sched: Add accessor function for packet length for qdiscs
net_sched: Add qdisc_enqueue wrapper
highmem: Export totalhigh_pages.
ipv6 mcast: Omit redundant address family checks in ip6_mc_source().
net: Use standard structures for generic socket address structures.
ipv6 netns: Make several "global" sysctl variables namespace aware.
netns: Use net_eq() to compare net-namespaces for optimization.
ipv6: remove unused macros from net/ipv6.h
ipv6: remove unused parameter from ip6_ra_control
tcp: fix kernel panic with listening_get_next
tcp: Remove redundant checks when setting eff_sacks
tcp: options clean up
tcp: Fix MD5 signatures for non-linear skbs
sctp: Update sctp global memory limit allocations.
sctp: remove unnecessary byteshifting, calculate directly in big-endian
sctp: Allow only 1 listening socket with SO_REUSEADDR
sctp: Do not leak memory on multiple listen() calls
sctp: Support ipv6only AF_INET6 sockets.
...
Diffstat (limited to 'Documentation/networking')
-rw-r--r-- | Documentation/networking/bonding.txt | 110 | ||||
-rw-r--r-- | Documentation/networking/dm9000.txt | 167 | ||||
-rw-r--r-- | Documentation/networking/ip-sysctl.txt | 21 | ||||
-rw-r--r-- | Documentation/networking/ixgb.txt | 419 | ||||
-rw-r--r-- | Documentation/networking/mac80211_hwsim/README | 67 | ||||
-rw-r--r-- | Documentation/networking/mac80211_hwsim/hostapd.conf | 11 | ||||
-rw-r--r-- | Documentation/networking/mac80211_hwsim/wpa_supplicant.conf | 10 | ||||
-rw-r--r-- | Documentation/networking/multiqueue.txt | 90 | ||||
-rw-r--r-- | Documentation/networking/s2io.txt | 7 |
9 files changed, 675 insertions, 227 deletions
diff --git a/Documentation/networking/bonding.txt b/Documentation/networking/bonding.txt index a0cda062bc33..7fa7fe71d7a8 100644 --- a/Documentation/networking/bonding.txt +++ b/Documentation/networking/bonding.txt | |||
@@ -289,35 +289,73 @@ downdelay | |||
289 | fail_over_mac | 289 | fail_over_mac |
290 | 290 | ||
291 | Specifies whether active-backup mode should set all slaves to | 291 | Specifies whether active-backup mode should set all slaves to |
292 | the same MAC address (the traditional behavior), or, when | 292 | the same MAC address at enslavement (the traditional |
293 | enabled, change the bond's MAC address when changing the | 293 | behavior), or, when enabled, perform special handling of the |
294 | active interface (i.e., fail over the MAC address itself). | 294 | bond's MAC address in accordance with the selected policy. |
295 | 295 | ||
296 | Fail over MAC is useful for devices that cannot ever alter | 296 | Possible values are: |
297 | their MAC address, or for devices that refuse incoming | 297 | |
298 | broadcasts with their own source MAC (which interferes with | 298 | none or 0 |
299 | the ARP monitor). | 299 | |
300 | 300 | This setting disables fail_over_mac, and causes | |
301 | The down side of fail over MAC is that every device on the | 301 | bonding to set all slaves of an active-backup bond to |
302 | network must be updated via gratuitous ARP, vs. just updating | 302 | the same MAC address at enslavement time. This is the |
303 | a switch or set of switches (which often takes place for any | 303 | default. |
304 | traffic, not just ARP traffic, if the switch snoops incoming | 304 | |
305 | traffic to update its tables) for the traditional method. If | 305 | active or 1 |
306 | the gratuitous ARP is lost, communication may be disrupted. | 306 | |
307 | 307 | The "active" fail_over_mac policy indicates that the | |
308 | When fail over MAC is used in conjuction with the mii monitor, | 308 | MAC address of the bond should always be the MAC |
309 | devices which assert link up prior to being able to actually | 309 | address of the currently active slave. The MAC |
310 | transmit and receive are particularly susecptible to loss of | 310 | address of the slaves is not changed; instead, the MAC |
311 | the gratuitous ARP, and an appropriate updelay setting may be | 311 | address of the bond changes during a failover. |
312 | required. | 312 | |
313 | 313 | This policy is useful for devices that cannot ever | |
314 | A value of 0 disables fail over MAC, and is the default. A | 314 | alter their MAC address, or for devices that refuse |
315 | value of 1 enables fail over MAC. This option is enabled | 315 | incoming broadcasts with their own source MAC (which |
316 | automatically if the first slave added cannot change its MAC | 316 | interferes with the ARP monitor). |
317 | address. This option may be modified via sysfs only when no | 317 | |
318 | slaves are present in the bond. | 318 | The down side of this policy is that every device on |
319 | 319 | the network must be updated via gratuitous ARP, | |
320 | This option was added in bonding version 3.2.0. | 320 | vs. just updating a switch or set of switches (which |
321 | often takes place for any traffic, not just ARP | ||
322 | traffic, if the switch snoops incoming traffic to | ||
323 | update its tables) for the traditional method. If the | ||
324 | gratuitous ARP is lost, communication may be | ||
325 | disrupted. | ||
326 | |||
327 | When this policy is used in conjuction with the mii | ||
328 | monitor, devices which assert link up prior to being | ||
329 | able to actually transmit and receive are particularly | ||
330 | susecptible to loss of the gratuitous ARP, and an | ||
331 | appropriate updelay setting may be required. | ||
332 | |||
333 | follow or 2 | ||
334 | |||
335 | The "follow" fail_over_mac policy causes the MAC | ||
336 | address of the bond to be selected normally (normally | ||
337 | the MAC address of the first slave added to the bond). | ||
338 | However, the second and subsequent slaves are not set | ||
339 | to this MAC address while they are in a backup role; a | ||
340 | slave is programmed with the bond's MAC address at | ||
341 | failover time (and the formerly active slave receives | ||
342 | the newly active slave's MAC address). | ||
343 | |||
344 | This policy is useful for multiport devices that | ||
345 | either become confused or incur a performance penalty | ||
346 | when multiple ports are programmed with the same MAC | ||
347 | address. | ||
348 | |||
349 | |||
350 | The default policy is none, unless the first slave cannot | ||
351 | change its MAC address, in which case the active policy is | ||
352 | selected by default. | ||
353 | |||
354 | This option may be modified via sysfs only when no slaves are | ||
355 | present in the bond. | ||
356 | |||
357 | This option was added in bonding version 3.2.0. The "follow" | ||
358 | policy was added in bonding version 3.3.0. | ||
321 | 359 | ||
322 | lacp_rate | 360 | lacp_rate |
323 | 361 | ||
@@ -338,7 +376,8 @@ max_bonds | |||
338 | Specifies the number of bonding devices to create for this | 376 | Specifies the number of bonding devices to create for this |
339 | instance of the bonding driver. E.g., if max_bonds is 3, and | 377 | instance of the bonding driver. E.g., if max_bonds is 3, and |
340 | the bonding driver is not already loaded, then bond0, bond1 | 378 | the bonding driver is not already loaded, then bond0, bond1 |
341 | and bond2 will be created. The default value is 1. | 379 | and bond2 will be created. The default value is 1. Specifying |
380 | a value of 0 will load bonding, but will not create any devices. | ||
342 | 381 | ||
343 | miimon | 382 | miimon |
344 | 383 | ||
@@ -501,6 +540,17 @@ mode | |||
501 | swapped with the new curr_active_slave that was | 540 | swapped with the new curr_active_slave that was |
502 | chosen. | 541 | chosen. |
503 | 542 | ||
543 | num_grat_arp | ||
544 | |||
545 | Specifies the number of gratuitous ARPs to be issued after a | ||
546 | failover event. One gratuitous ARP is issued immediately after | ||
547 | the failover, subsequent ARPs are sent at a rate of one per link | ||
548 | monitor interval (arp_interval or miimon, whichever is active). | ||
549 | |||
550 | The valid range is 0 - 255; the default value is 1. This option | ||
551 | affects only the active-backup mode. This option was added for | ||
552 | bonding version 3.3.0. | ||
553 | |||
504 | primary | 554 | primary |
505 | 555 | ||
506 | A string (eth0, eth2, etc) specifying which slave is the | 556 | A string (eth0, eth2, etc) specifying which slave is the |
diff --git a/Documentation/networking/dm9000.txt b/Documentation/networking/dm9000.txt new file mode 100644 index 000000000000..65df3dea5561 --- /dev/null +++ b/Documentation/networking/dm9000.txt | |||
@@ -0,0 +1,167 @@ | |||
1 | DM9000 Network driver | ||
2 | ===================== | ||
3 | |||
4 | Copyright 2008 Simtec Electronics, | ||
5 | Ben Dooks <ben@simtec.co.uk> <ben-linux@fluff.org> | ||
6 | |||
7 | |||
8 | Introduction | ||
9 | ------------ | ||
10 | |||
11 | This file describes how to use the DM9000 platform-device based network driver | ||
12 | that is contained in the files drivers/net/dm9000.c and drivers/net/dm9000.h. | ||
13 | |||
14 | The driver supports three DM9000 variants, the DM9000E which is the first chip | ||
15 | supported as well as the newer DM9000A and DM9000B devices. It is currently | ||
16 | maintained and tested by Ben Dooks, who should be CC: to any patches for this | ||
17 | driver. | ||
18 | |||
19 | |||
20 | Defining the platform device | ||
21 | ---------------------------- | ||
22 | |||
23 | The minimum set of resources attached to the platform device are as follows: | ||
24 | |||
25 | 1) The physical address of the address register | ||
26 | 2) The physical address of the data register | ||
27 | 3) The IRQ line the device's interrupt pin is connected to. | ||
28 | |||
29 | These resources should be specified in that order, as the ordering of the | ||
30 | two address regions is important (the driver expects these to be address | ||
31 | and then data). | ||
32 | |||
33 | An example from arch/arm/mach-s3c2410/mach-bast.c is: | ||
34 | |||
35 | static struct resource bast_dm9k_resource[] = { | ||
36 | [0] = { | ||
37 | .start = S3C2410_CS5 + BAST_PA_DM9000, | ||
38 | .end = S3C2410_CS5 + BAST_PA_DM9000 + 3, | ||
39 | .flags = IORESOURCE_MEM, | ||
40 | }, | ||
41 | [1] = { | ||
42 | .start = S3C2410_CS5 + BAST_PA_DM9000 + 0x40, | ||
43 | .end = S3C2410_CS5 + BAST_PA_DM9000 + 0x40 + 0x3f, | ||
44 | .flags = IORESOURCE_MEM, | ||
45 | }, | ||
46 | [2] = { | ||
47 | .start = IRQ_DM9000, | ||
48 | .end = IRQ_DM9000, | ||
49 | .flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHLEVEL, | ||
50 | } | ||
51 | }; | ||
52 | |||
53 | static struct platform_device bast_device_dm9k = { | ||
54 | .name = "dm9000", | ||
55 | .id = 0, | ||
56 | .num_resources = ARRAY_SIZE(bast_dm9k_resource), | ||
57 | .resource = bast_dm9k_resource, | ||
58 | }; | ||
59 | |||
60 | Note the setting of the IRQ trigger flag in bast_dm9k_resource[2].flags, | ||
61 | as this will generate a warning if it is not present. The trigger from | ||
62 | the flags field will be passed to request_irq() when registering the IRQ | ||
63 | handler to ensure that the IRQ is setup correctly. | ||
64 | |||
65 | This shows a typical platform device, without the optional configuration | ||
66 | platform data supplied. The next example uses the same resources, but adds | ||
67 | the optional platform data to pass extra configuration data: | ||
68 | |||
69 | static struct dm9000_plat_data bast_dm9k_platdata = { | ||
70 | .flags = DM9000_PLATF_16BITONLY, | ||
71 | }; | ||
72 | |||
73 | static struct platform_device bast_device_dm9k = { | ||
74 | .name = "dm9000", | ||
75 | .id = 0, | ||
76 | .num_resources = ARRAY_SIZE(bast_dm9k_resource), | ||
77 | .resource = bast_dm9k_resource, | ||
78 | .dev = { | ||
79 | .platform_data = &bast_dm9k_platdata, | ||
80 | } | ||
81 | }; | ||
82 | |||
83 | The platform data is defined in include/linux/dm9000.h and described below. | ||
84 | |||
85 | |||
86 | Platform data | ||
87 | ------------- | ||
88 | |||
89 | Extra platform data for the DM9000 can describe the IO bus width to the | ||
90 | device, whether or not an external PHY is attached to the device and | ||
91 | the availability of an external configuration EEPROM. | ||
92 | |||
93 | The flags for the platform data .flags field are as follows: | ||
94 | |||
95 | DM9000_PLATF_8BITONLY | ||
96 | |||
97 | The IO should be done with 8bit operations. | ||
98 | |||
99 | DM9000_PLATF_16BITONLY | ||
100 | |||
101 | The IO should be done with 16bit operations. | ||
102 | |||
103 | DM9000_PLATF_32BITONLY | ||
104 | |||
105 | The IO should be done with 32bit operations. | ||
106 | |||
107 | DM9000_PLATF_EXT_PHY | ||
108 | |||
109 | The chip is connected to an external PHY. | ||
110 | |||
111 | DM9000_PLATF_NO_EEPROM | ||
112 | |||
113 | This can be used to signify that the board does not have an | ||
114 | EEPROM, or that the EEPROM should be hidden from the user. | ||
115 | |||
116 | DM9000_PLATF_SIMPLE_PHY | ||
117 | |||
118 | Switch to using the simpler PHY polling method which does not | ||
119 | try and read the MII PHY state regularly. This is only available | ||
120 | when using the internal PHY. See the section on link state polling | ||
121 | for more information. | ||
122 | |||
123 | The config symbol DM9000_FORCE_SIMPLE_PHY_POLL, Kconfig entry | ||
124 | "Force simple NSR based PHY polling" allows this flag to be | ||
125 | forced on at build time. | ||
126 | |||
127 | |||
128 | PHY Link state polling | ||
129 | ---------------------- | ||
130 | |||
131 | The driver keeps track of the link state and informs the network core | ||
132 | about link (carrier) availablilty. This is managed by several methods | ||
133 | depending on the version of the chip and on which PHY is being used. | ||
134 | |||
135 | For the internal PHY, the original (and currently default) method is | ||
136 | to read the MII state, either when the status changes if we have the | ||
137 | necessary interrupt support in the chip or every two seconds via a | ||
138 | periodic timer. | ||
139 | |||
140 | To reduce the overhead for the internal PHY, there is now the option | ||
141 | of using the DM9000_FORCE_SIMPLE_PHY_POLL config, or DM9000_PLATF_SIMPLE_PHY | ||
142 | platform data option to read the summary information without the | ||
143 | expensive MII accesses. This method is faster, but does not print | ||
144 | as much information. | ||
145 | |||
146 | When using an external PHY, the driver currently has to poll the MII | ||
147 | link status as there is no method for getting an interrupt on link change. | ||
148 | |||
149 | |||
150 | DM9000A / DM9000B | ||
151 | ----------------- | ||
152 | |||
153 | These chips are functionally similar to the DM9000E and are supported easily | ||
154 | by the same driver. The features are: | ||
155 | |||
156 | 1) Interrupt on internal PHY state change. This means that the periodic | ||
157 | polling of the PHY status may be disabled on these devices when using | ||
158 | the internal PHY. | ||
159 | |||
160 | 2) TCP/UDP checksum offloading, which the driver does not currently support. | ||
161 | |||
162 | |||
163 | ethtool | ||
164 | ------- | ||
165 | |||
166 | The driver supports the ethtool interface for access to the driver | ||
167 | state information, the PHY state and the EEPROM. | ||
diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt index 946b66e1b652..d84932650fd3 100644 --- a/Documentation/networking/ip-sysctl.txt +++ b/Documentation/networking/ip-sysctl.txt | |||
@@ -551,8 +551,9 @@ icmp_echo_ignore_broadcasts - BOOLEAN | |||
551 | icmp_ratelimit - INTEGER | 551 | icmp_ratelimit - INTEGER |
552 | Limit the maximal rates for sending ICMP packets whose type matches | 552 | Limit the maximal rates for sending ICMP packets whose type matches |
553 | icmp_ratemask (see below) to specific targets. | 553 | icmp_ratemask (see below) to specific targets. |
554 | 0 to disable any limiting, otherwise the maximal rate in jiffies(1) | 554 | 0 to disable any limiting, |
555 | Default: 100 | 555 | otherwise the minimal space between responses in milliseconds. |
556 | Default: 1000 | ||
556 | 557 | ||
557 | icmp_ratemask - INTEGER | 558 | icmp_ratemask - INTEGER |
558 | Mask made of ICMP types for which rates are being limited. | 559 | Mask made of ICMP types for which rates are being limited. |
@@ -1023,11 +1024,23 @@ max_addresses - INTEGER | |||
1023 | autoconfigured addresses. | 1024 | autoconfigured addresses. |
1024 | Default: 16 | 1025 | Default: 16 |
1025 | 1026 | ||
1027 | disable_ipv6 - BOOLEAN | ||
1028 | Disable IPv6 operation. | ||
1029 | Default: FALSE (enable IPv6 operation) | ||
1030 | |||
1031 | accept_dad - INTEGER | ||
1032 | Whether to accept DAD (Duplicate Address Detection). | ||
1033 | 0: Disable DAD | ||
1034 | 1: Enable DAD (default) | ||
1035 | 2: Enable DAD, and disable IPv6 operation if MAC-based duplicate | ||
1036 | link-local address has been found. | ||
1037 | |||
1026 | icmp/*: | 1038 | icmp/*: |
1027 | ratelimit - INTEGER | 1039 | ratelimit - INTEGER |
1028 | Limit the maximal rates for sending ICMPv6 packets. | 1040 | Limit the maximal rates for sending ICMPv6 packets. |
1029 | 0 to disable any limiting, otherwise the maximal rate in jiffies(1) | 1041 | 0 to disable any limiting, |
1030 | Default: 100 | 1042 | otherwise the minimal space between responses in milliseconds. |
1043 | Default: 1000 | ||
1031 | 1044 | ||
1032 | 1045 | ||
1033 | IPv6 Update by: | 1046 | IPv6 Update by: |
diff --git a/Documentation/networking/ixgb.txt b/Documentation/networking/ixgb.txt index 7c98277777eb..a0d0ffb5e584 100644 --- a/Documentation/networking/ixgb.txt +++ b/Documentation/networking/ixgb.txt | |||
@@ -1,7 +1,7 @@ | |||
1 | Linux* Base Driver for the Intel(R) PRO/10GbE Family of Adapters | 1 | Linux Base Driver for 10 Gigabit Intel(R) Network Connection |
2 | ================================================================ | 2 | ============================================================= |
3 | 3 | ||
4 | November 17, 2004 | 4 | October 9, 2007 |
5 | 5 | ||
6 | 6 | ||
7 | Contents | 7 | Contents |
@@ -9,94 +9,151 @@ Contents | |||
9 | 9 | ||
10 | - In This Release | 10 | - In This Release |
11 | - Identifying Your Adapter | 11 | - Identifying Your Adapter |
12 | - Building and Installation | ||
12 | - Command Line Parameters | 13 | - Command Line Parameters |
13 | - Improving Performance | 14 | - Improving Performance |
15 | - Additional Configurations | ||
16 | - Known Issues/Troubleshooting | ||
14 | - Support | 17 | - Support |
15 | 18 | ||
16 | 19 | ||
20 | |||
17 | In This Release | 21 | In This Release |
18 | =============== | 22 | =============== |
19 | 23 | ||
20 | This file describes the Linux* Base Driver for the Intel(R) PRO/10GbE Family | 24 | This file describes the ixgb Linux Base Driver for the 10 Gigabit Intel(R) |
21 | of Adapters, version 1.0.x. | 25 | Network Connection. This driver includes support for Itanium(R)2-based |
26 | systems. | ||
27 | |||
28 | For questions related to hardware requirements, refer to the documentation | ||
29 | supplied with your 10 Gigabit adapter. All hardware requirements listed apply | ||
30 | to use with Linux. | ||
31 | |||
32 | The following features are available in this kernel: | ||
33 | - Native VLANs | ||
34 | - Channel Bonding (teaming) | ||
35 | - SNMP | ||
36 | |||
37 | Channel Bonding documentation can be found in the Linux kernel source: | ||
38 | /Documentation/networking/bonding.txt | ||
39 | |||
40 | The driver information previously displayed in the /proc filesystem is not | ||
41 | supported in this release. Alternatively, you can use ethtool (version 1.6 | ||
42 | or later), lspci, and ifconfig to obtain the same information. | ||
43 | |||
44 | Instructions on updating ethtool can be found in the section "Additional | ||
45 | Configurations" later in this document. | ||
22 | 46 | ||
23 | For questions related to hardware requirements, refer to the documentation | ||
24 | supplied with your Intel PRO/10GbE adapter. All hardware requirements listed | ||
25 | apply to use with Linux. | ||
26 | 47 | ||
27 | Identifying Your Adapter | 48 | Identifying Your Adapter |
28 | ======================== | 49 | ======================== |
29 | 50 | ||
30 | To verify your Intel adapter is supported, find the board ID number on the | 51 | The following Intel network adapters are compatible with the drivers in this |
31 | adapter. Look for a label that has a barcode and a number in the format | 52 | release: |
32 | A12345-001. | 53 | |
54 | Controller Adapter Name Physical Layer | ||
55 | ---------- ------------ -------------- | ||
56 | 82597EX Intel(R) PRO/10GbE LR/SR/CX4 10G Base-LR (1310 nm optical fiber) | ||
57 | Server Adapters 10G Base-SR (850 nm optical fiber) | ||
58 | 10G Base-CX4(twin-axial copper cabling) | ||
59 | |||
60 | For more information on how to identify your adapter, go to the Adapter & | ||
61 | Driver ID Guide at: | ||
62 | |||
63 | http://support.intel.com/support/network/sb/CS-012904.htm | ||
64 | |||
65 | |||
66 | Building and Installation | ||
67 | ========================= | ||
68 | |||
69 | select m for "Intel(R) PRO/10GbE support" located at: | ||
70 | Location: | ||
71 | -> Device Drivers | ||
72 | -> Network device support (NETDEVICES [=y]) | ||
73 | -> Ethernet (10000 Mbit) (NETDEV_10000 [=y]) | ||
74 | 1. make modules && make modules_install | ||
75 | |||
76 | 2. Load the module: | ||
77 | |||
78 | Â Â Â Â modprobe ixgb <parameter>=<value> | ||
79 | |||
80 | The insmod command can be used if the full | ||
81 | path to the driver module is specified. For example: | ||
82 | |||
83 | insmod /lib/modules/<KERNEL VERSION>/kernel/drivers/net/ixgb/ixgb.ko | ||
84 | |||
85 | With 2.6 based kernels also make sure that older ixgb drivers are | ||
86 | removed from the kernel, before loading the new module: | ||
33 | 87 | ||
34 | Use the above information and the Adapter & Driver ID Guide at: | 88 | rmmod ixgb; modprobe ixgb |
35 | 89 | ||
36 | http://support.intel.com/support/network/adapter/pro100/21397.htm | 90 | 3. Assign an IP address to the interface by entering the following, where |
91 | x is the interface number: | ||
37 | 92 | ||
38 | For the latest Intel network drivers for Linux, go to: | 93 | ifconfig ethx <IP_address> |
94 | |||
95 | 4. Verify that the interface works. Enter the following, where <IP_address> | ||
96 | is the IP address for another machine on the same subnet as the interface | ||
97 | that is being tested: | ||
98 | |||
99 | ping <IP_address> | ||
39 | 100 | ||
40 | http://downloadfinder.intel.com/scripts-df/support_intel.asp | ||
41 | 101 | ||
42 | Command Line Parameters | 102 | Command Line Parameters |
43 | ======================= | 103 | ======================= |
44 | 104 | ||
45 | If the driver is built as a module, the following optional parameters are | 105 | If the driver is built as a module, the following optional parameters are |
46 | used by entering them on the command line with the modprobe or insmod command | 106 | used by entering them on the command line with the modprobe command using |
47 | using this syntax: | 107 | this syntax: |
48 | 108 | ||
49 | modprobe ixgb [<option>=<VAL1>,<VAL2>,...] | 109 | modprobe ixgb [<option>=<VAL1>,<VAL2>,...] |
50 | 110 | ||
51 | insmod ixgb [<option>=<VAL1>,<VAL2>,...] | 111 | For example, with two 10GbE PCI adapters, entering: |
52 | 112 | ||
53 | For example, with two PRO/10GbE PCI adapters, entering: | 113 | modprobe ixgb TxDescriptors=80,128 |
54 | 114 | ||
55 | insmod ixgb TxDescriptors=80,128 | 115 | loads the ixgb driver with 80 TX resources for the first adapter and 128 TX |
56 | |||
57 | loads the ixgb driver with 80 TX resources for the first adapter and 128 TX | ||
58 | resources for the second adapter. | 116 | resources for the second adapter. |
59 | 117 | ||
60 | The default value for each parameter is generally the recommended setting, | 118 | The default value for each parameter is generally the recommended setting, |
61 | unless otherwise noted. Also, if the driver is statically built into the | 119 | unless otherwise noted. |
62 | kernel, the driver is loaded with the default values for all the parameters. | ||
63 | Ethtool can be used to change some of the parameters at runtime. | ||
64 | 120 | ||
65 | FlowControl | 121 | FlowControl |
66 | Valid Range: 0-3 (0=none, 1=Rx only, 2=Tx only, 3=Rx&Tx) | 122 | Valid Range: 0-3 (0=none, 1=Rx only, 2=Tx only, 3=Rx&Tx) |
67 | Default: Read from the EEPROM | 123 | Default: Read from the EEPROM |
68 | If EEPROM is not detected, default is 3 | 124 | If EEPROM is not detected, default is 1 |
69 | This parameter controls the automatic generation(Tx) and response(Rx) to | 125 | This parameter controls the automatic generation(Tx) and response(Rx) to |
70 | Ethernet PAUSE frames. | 126 | Ethernet PAUSE frames. There are hardware bugs associated with enabling |
127 | Tx flow control so beware. | ||
71 | 128 | ||
72 | RxDescriptors | 129 | RxDescriptors |
73 | Valid Range: 64-512 | 130 | Valid Range: 64-512 |
74 | Default Value: 512 | 131 | Default Value: 512 |
75 | This value is the number of receive descriptors allocated by the driver. | 132 | This value is the number of receive descriptors allocated by the driver. |
76 | Increasing this value allows the driver to buffer more incoming packets. | 133 | Increasing this value allows the driver to buffer more incoming packets. |
77 | Each descriptor is 16 bytes. A receive buffer is also allocated for | 134 | Each descriptor is 16 bytes. A receive buffer is also allocated for |
78 | each descriptor and can be either 2048, 4056, 8192, or 16384 bytes, | 135 | each descriptor and can be either 2048, 4056, 8192, or 16384 bytes, |
79 | depending on the MTU setting. When the MTU size is 1500 or less, the | 136 | depending on the MTU setting. When the MTU size is 1500 or less, the |
80 | receive buffer size is 2048 bytes. When the MTU is greater than 1500 the | 137 | receive buffer size is 2048 bytes. When the MTU is greater than 1500 the |
81 | receive buffer size will be either 4056, 8192, or 16384 bytes. The | 138 | receive buffer size will be either 4056, 8192, or 16384 bytes. The |
82 | maximum MTU size is 16114. | 139 | maximum MTU size is 16114. |
83 | 140 | ||
84 | RxIntDelay | 141 | RxIntDelay |
85 | Valid Range: 0-65535 (0=off) | 142 | Valid Range: 0-65535 (0=off) |
86 | Default Value: 6 | 143 | Default Value: 72 |
87 | This value delays the generation of receive interrupts in units of | 144 | This value delays the generation of receive interrupts in units of |
88 | 0.8192 microseconds. Receive interrupt reduction can improve CPU | 145 | 0.8192 microseconds. Receive interrupt reduction can improve CPU |
89 | efficiency if properly tuned for specific network traffic. Increasing | 146 | efficiency if properly tuned for specific network traffic. Increasing |
90 | this value adds extra latency to frame reception and can end up | 147 | this value adds extra latency to frame reception and can end up |
91 | decreasing the throughput of TCP traffic. If the system is reporting | 148 | decreasing the throughput of TCP traffic. If the system is reporting |
92 | dropped receives, this value may be set too high, causing the driver to | 149 | dropped receives, this value may be set too high, causing the driver to |
93 | run out of available receive descriptors. | 150 | run out of available receive descriptors. |
94 | 151 | ||
95 | TxDescriptors | 152 | TxDescriptors |
96 | Valid Range: 64-4096 | 153 | Valid Range: 64-4096 |
97 | Default Value: 256 | 154 | Default Value: 256 |
98 | This value is the number of transmit descriptors allocated by the driver. | 155 | This value is the number of transmit descriptors allocated by the driver. |
99 | Increasing this value allows the driver to queue more transmits. Each | 156 | Increasing this value allows the driver to queue more transmits. Each |
100 | descriptor is 16 bytes. | 157 | descriptor is 16 bytes. |
101 | 158 | ||
102 | XsumRX | 159 | XsumRX |
@@ -105,51 +162,49 @@ Default Value: 1 | |||
105 | A value of '1' indicates that the driver should enable IP checksum | 162 | A value of '1' indicates that the driver should enable IP checksum |
106 | offload for received packets (both UDP and TCP) to the adapter hardware. | 163 | offload for received packets (both UDP and TCP) to the adapter hardware. |
107 | 164 | ||
108 | XsumTX | ||
109 | Valid Range: 0-1 | ||
110 | Default Value: 1 | ||
111 | A value of '1' indicates that the driver should enable IP checksum | ||
112 | offload for transmitted packets (both UDP and TCP) to the adapter | ||
113 | hardware. | ||
114 | 165 | ||
115 | Improving Performance | 166 | Improving Performance |
116 | ===================== | 167 | ===================== |
117 | 168 | ||
118 | With the Intel PRO/10 GbE adapter, the default Linux configuration will very | 169 | With the 10 Gigabit server adapters, the default Linux configuration will |
119 | likely limit the total available throughput artificially. There is a set of | 170 | very likely limit the total available throughput artificially. There is a set |
120 | things that when applied together increase the ability of Linux to transmit | 171 | of configuration changes that, when applied together, will increase the ability |
121 | and receive data. The following enhancements were originally acquired from | 172 | of Linux to transmit and receive data. The following enhancements were |
122 | settings published at http://www.spec.org/web99 for various submitted results | 173 | originally acquired from settings published at http://www.spec.org/web99/ for |
123 | using Linux. | 174 | various submitted results using Linux. |
124 | 175 | ||
125 | NOTE: These changes are only suggestions, and serve as a starting point for | 176 | NOTE: These changes are only suggestions, and serve as a starting point for |
126 | tuning your network performance. | 177 | tuning your network performance. |
127 | 178 | ||
128 | The changes are made in three major ways, listed in order of greatest effect: | 179 | The changes are made in three major ways, listed in order of greatest effect: |
129 | - Use ifconfig to modify the mtu (maximum transmission unit) and the txqueuelen | 180 | - Use ifconfig to modify the mtu (maximum transmission unit) and the txqueuelen |
130 | parameter. | 181 | parameter. |
131 | - Use sysctl to modify /proc parameters (essentially kernel tuning) | 182 | - Use sysctl to modify /proc parameters (essentially kernel tuning) |
132 | - Use setpci to modify the MMRBC field in PCI-X configuration space to increase | 183 | - Use setpci to modify the MMRBC field in PCI-X configuration space to increase |
133 | transmit burst lengths on the bus. | 184 | transmit burst lengths on the bus. |
134 | 185 | ||
135 | NOTE: setpci modifies the adapter's configuration registers to allow it to read | 186 | NOTE: setpci modifies the adapter's configuration registers to allow it to read |
136 | up to 4k bytes at a time (for transmits). However, for some systems the | 187 | up to 4k bytes at a time (for transmits). However, for some systems the |
137 | behavior after modifying this register may be undefined (possibly errors of some | 188 | behavior after modifying this register may be undefined (possibly errors of |
138 | kind). A power-cycle, hard reset or explicitly setting the e6 register back to | 189 | some kind). A power-cycle, hard reset or explicitly setting the e6 register |
139 | 22 (setpci -d 8086:1048 e6.b=22) may be required to get back to a stable | 190 | back to 22 (setpci -d 8086:1a48 e6.b=22) may be required to get back to a |
140 | configuration. | 191 | stable configuration. |
141 | 192 | ||
142 | - COPY these lines and paste them into ixgb_perf.sh: | 193 | - COPY these lines and paste them into ixgb_perf.sh: |
143 | #!/bin/bash | 194 | #!/bin/bash |
144 | echo "configuring network performance , edit this file to change the interface" | 195 | echo "configuring network performance , edit this file to change the interface |
196 | or device ID of 10GbE card" | ||
145 | # set mmrbc to 4k reads, modify only Intel 10GbE device IDs | 197 | # set mmrbc to 4k reads, modify only Intel 10GbE device IDs |
146 | setpci -d 8086:1048 e6.b=2e | 198 | # replace 1a48 with appropriate 10GbE device's ID installed on the system, |
147 | # set the MTU (max transmission unit) - it requires your switch and clients to change too! | 199 | # if needed. |
200 | setpci -d 8086:1a48 e6.b=2e | ||
201 | # set the MTU (max transmission unit) - it requires your switch and clients | ||
202 | # to change as well. | ||
148 | # set the txqueuelen | 203 | # set the txqueuelen |
149 | # your ixgb adapter should be loaded as eth1 for this to work, change if needed | 204 | # your ixgb adapter should be loaded as eth1 for this to work, change if needed |
150 | ifconfig eth1 mtu 9000 txqueuelen 1000 up | 205 | ifconfig eth1 mtu 9000 txqueuelen 1000 up |
151 | # call the sysctl utility to modify /proc/sys entries | 206 | # call the sysctl utility to modify /proc/sys entries |
152 | sysctl -p ./sysctl_ixgb.conf | 207 | sysctl -p ./sysctl_ixgb.conf |
153 | - END ixgb_perf.sh | 208 | - END ixgb_perf.sh |
154 | 209 | ||
155 | - COPY these lines and paste them into sysctl_ixgb.conf: | 210 | - COPY these lines and paste them into sysctl_ixgb.conf: |
@@ -159,54 +214,220 @@ sysctl -p ./sysctl_ixgb.conf | |||
159 | # several network benchmark tests, your mileage may vary | 214 | # several network benchmark tests, your mileage may vary |
160 | 215 | ||
161 | ### IPV4 specific settings | 216 | ### IPV4 specific settings |
162 | net.ipv4.tcp_timestamps = 0 # turns TCP timestamp support off, default 1, reduces CPU use | 217 | # turn TCP timestamp support off, default 1, reduces CPU use |
163 | net.ipv4.tcp_sack = 0 # turn SACK support off, default on | 218 | net.ipv4.tcp_timestamps = 0 |
164 | # on systems with a VERY fast bus -> memory interface this is the big gainer | 219 | # turn SACK support off, default on |
165 | net.ipv4.tcp_rmem = 10000000 10000000 10000000 # sets min/default/max TCP read buffer, default 4096 87380 174760 | 220 | # on systems with a VERY fast bus -> memory interface this is the big gainer |
166 | net.ipv4.tcp_wmem = 10000000 10000000 10000000 # sets min/pressure/max TCP write buffer, default 4096 16384 131072 | 221 | net.ipv4.tcp_sack = 0 |
167 | net.ipv4.tcp_mem = 10000000 10000000 10000000 # sets min/pressure/max TCP buffer space, default 31744 32256 32768 | 222 | # set min/default/max TCP read buffer, default 4096 87380 174760 |
223 | net.ipv4.tcp_rmem = 10000000 10000000 10000000 | ||
224 | # set min/pressure/max TCP write buffer, default 4096 16384 131072 | ||
225 | net.ipv4.tcp_wmem = 10000000 10000000 10000000 | ||
226 | # set min/pressure/max TCP buffer space, default 31744 32256 32768 | ||
227 | net.ipv4.tcp_mem = 10000000 10000000 10000000 | ||
168 | 228 | ||
169 | ### CORE settings (mostly for socket and UDP effect) | 229 | ### CORE settings (mostly for socket and UDP effect) |
170 | net.core.rmem_max = 524287 # maximum receive socket buffer size, default 131071 | 230 | # set maximum receive socket buffer size, default 131071 |
171 | net.core.wmem_max = 524287 # maximum send socket buffer size, default 131071 | 231 | net.core.rmem_max = 524287 |
172 | net.core.rmem_default = 524287 # default receive socket buffer size, default 65535 | 232 | # set maximum send socket buffer size, default 131071 |
173 | net.core.wmem_default = 524287 # default send socket buffer size, default 65535 | 233 | net.core.wmem_max = 524287 |
174 | net.core.optmem_max = 524287 # maximum amount of option memory buffers, default 10240 | 234 | # set default receive socket buffer size, default 65535 |
175 | net.core.netdev_max_backlog = 300000 # number of unprocessed input packets before kernel starts dropping them, default 300 | 235 | net.core.rmem_default = 524287 |
236 | # set default send socket buffer size, default 65535 | ||
237 | net.core.wmem_default = 524287 | ||
238 | # set maximum amount of option memory buffers, default 10240 | ||
239 | net.core.optmem_max = 524287 | ||
240 | # set number of unprocessed input packets before kernel starts dropping them; default 300 | ||
241 | net.core.netdev_max_backlog = 300000 | ||
176 | - END sysctl_ixgb.conf | 242 | - END sysctl_ixgb.conf |
177 | 243 | ||
178 | Edit the ixgb_perf.sh script if necessary to change eth1 to whatever interface | 244 | Edit the ixgb_perf.sh script if necessary to change eth1 to whatever interface |
179 | your ixgb driver is using. | 245 | your ixgb driver is using and/or replace '1a48' with appropriate 10GbE device's |
246 | ID installed on the system. | ||
180 | 247 | ||
181 | NOTE: Unless these scripts are added to the boot process, these changes will | 248 | NOTE: Unless these scripts are added to the boot process, these changes will |
182 | only last only until the next system reboot. | 249 | only last only until the next system reboot. |
183 | 250 | ||
184 | 251 | ||
185 | Resolving Slow UDP Traffic | 252 | Resolving Slow UDP Traffic |
186 | -------------------------- | 253 | -------------------------- |
254 | If your server does not seem to be able to receive UDP traffic as fast as it | ||
255 | can receive TCP traffic, it could be because Linux, by default, does not set | ||
256 | the network stack buffers as large as they need to be to support high UDP | ||
257 | transfer rates. One way to alleviate this problem is to allow more memory to | ||
258 | be used by the IP stack to store incoming data. | ||
187 | 259 | ||
188 | If your server does not seem to be able to receive UDP traffic as fast as it | 260 | For instance, use the commands: |
189 | can receive TCP traffic, it could be because Linux, by default, does not set | ||
190 | the network stack buffers as large as they need to be to support high UDP | ||
191 | transfer rates. One way to alleviate this problem is to allow more memory to | ||
192 | be used by the IP stack to store incoming data. | ||
193 | |||
194 | For instance, use the commands: | ||
195 | sysctl -w net.core.rmem_max=262143 | 261 | sysctl -w net.core.rmem_max=262143 |
196 | and | 262 | and |
197 | sysctl -w net.core.rmem_default=262143 | 263 | sysctl -w net.core.rmem_default=262143 |
198 | to increase the read buffer memory max and default to 262143 (256k - 1) from | 264 | to increase the read buffer memory max and default to 262143 (256k - 1) from |
199 | defaults of max=131071 (128k - 1) and default=65535 (64k - 1). These variables | 265 | defaults of max=131071 (128k - 1) and default=65535 (64k - 1). These variables |
200 | will increase the amount of memory used by the network stack for receives, and | 266 | will increase the amount of memory used by the network stack for receives, and |
201 | can be increased significantly more if necessary for your application. | 267 | can be increased significantly more if necessary for your application. |
202 | 268 | ||
269 | |||
270 | Additional Configurations | ||
271 | ========================= | ||
272 | |||
273 | Configuring the Driver on Different Distributions | ||
274 | ------------------------------------------------- | ||
275 | Configuring a network driver to load properly when the system is started is | ||
276 | distribution dependent. Typically, the configuration process involves adding | ||
277 | an alias line to /etc/modprobe.conf as well as editing other system startup | ||
278 | scripts and/or configuration files. Many popular Linux distributions ship | ||
279 | with tools to make these changes for you. To learn the proper way to | ||
280 | configure a network device for your system, refer to your distribution | ||
281 | documentation. If during this process you are asked for the driver or module | ||
282 | name, the name for the Linux Base Driver for the Intel 10GbE Family of | ||
283 | Adapters is ixgb. | ||
284 | |||
285 | Viewing Link Messages | ||
286 | --------------------- | ||
287 | Link messages will not be displayed to the console if the distribution is | ||
288 | restricting system messages. In order to see network driver link messages on | ||
289 | your console, set dmesg to eight by entering the following: | ||
290 | |||
291 | dmesg -n 8 | ||
292 | |||
293 | NOTE: This setting is not saved across reboots. | ||
294 | |||
295 | |||
296 | Jumbo Frames | ||
297 | ------------ | ||
298 | The driver supports Jumbo Frames for all adapters. Jumbo Frames support is | ||
299 | enabled by changing the MTU to a value larger than the default of 1500. | ||
300 | The maximum value for the MTU is 16114. Use the ifconfig command to | ||
301 | increase the MTU size. For example: | ||
302 | |||
303 | ifconfig ethx mtu 9000 up | ||
304 | |||
305 | The maximum MTU setting for Jumbo Frames is 16114. This value coincides | ||
306 | with the maximum Jumbo Frames size of 16128. | ||
307 | |||
308 | |||
309 | Ethtool | ||
310 | ------- | ||
311 | The driver utilizes the ethtool interface for driver configuration and | ||
312 | diagnostics, as well as displaying statistical information. Ethtool | ||
313 | version 1.6 or later is required for this functionality. | ||
314 | |||
315 | The latest release of ethtool can be found from | ||
316 | http://sourceforge.net/projects/gkernel | ||
317 | |||
318 | NOTE: Ethtool 1.6 only supports a limited set of ethtool options. Support | ||
319 | for a more complete ethtool feature set can be enabled by upgrading | ||
320 | to the latest version. | ||
321 | |||
322 | |||
323 | NAPI | ||
324 | ---- | ||
325 | |||
326 | NAPI (Rx polling mode) is supported in the ixgb driver. NAPI is enabled | ||
327 | or disabled based on the configuration of the kernel. see CONFIG_IXGB_NAPI | ||
328 | |||
329 | See www.cyberus.ca/~hadi/usenix-paper.tgz for more information on NAPI. | ||
330 | |||
331 | |||
332 | Known Issues/Troubleshooting | ||
333 | ============================ | ||
334 | |||
335 | NOTE: After installing the driver, if your Intel Network Connection is not | ||
336 | working, verify in the "In This Release" section of the readme that you have | ||
337 | installed the correct driver. | ||
338 | |||
339 | Intel(R) PRO/10GbE CX4 Server Adapter Cable Interoperability Issue with | ||
340 | Fujitsu XENPAK Module in SmartBits Chassis | ||
341 | --------------------------------------------------------------------- | ||
342 | Excessive CRC errors may be observed if the Intel(R) PRO/10GbE CX4 | ||
343 | Server adapter is connected to a Fujitsu XENPAK CX4 module in a SmartBits | ||
344 | chassis using 15 m/24AWG cable assemblies manufactured by Fujitsu or Leoni. | ||
345 | The CRC errors may be received either by the Intel(R) PRO/10GbE CX4 | ||
346 | Server adapter or the SmartBits. If this situation occurs using a different | ||
347 | cable assembly may resolve the issue. | ||
348 | |||
349 | CX4 Server Adapter Cable Interoperability Issues with HP Procurve 3400cl | ||
350 | Switch Port | ||
351 | ------------------------------------------------------------------------ | ||
352 | Excessive CRC errors may be observed if the Intel(R) PRO/10GbE CX4 Server | ||
353 | adapter is connected to an HP Procurve 3400cl switch port using short cables | ||
354 | (1 m or shorter). If this situation occurs, using a longer cable may resolve | ||
355 | the issue. | ||
356 | |||
357 | Excessive CRC errors may be observed using Fujitsu 24AWG cable assemblies that | ||
358 | Are 10 m or longer or where using a Leoni 15 m/24AWG cable assembly. The CRC | ||
359 | errors may be received either by the CX4 Server adapter or at the switch. If | ||
360 | this situation occurs, using a different cable assembly may resolve the issue. | ||
361 | |||
362 | |||
363 | Jumbo Frames System Requirement | ||
364 | ------------------------------- | ||
365 | Memory allocation failures have been observed on Linux systems with 64 MB | ||
366 | of RAM or less that are running Jumbo Frames. If you are using Jumbo | ||
367 | Frames, your system may require more than the advertised minimum | ||
368 | requirement of 64 MB of system memory. | ||
369 | |||
370 | |||
371 | Performance Degradation with Jumbo Frames | ||
372 | ----------------------------------------- | ||
373 | Degradation in throughput performance may be observed in some Jumbo frames | ||
374 | environments. If this is observed, increasing the application's socket buffer | ||
375 | size and/or increasing the /proc/sys/net/ipv4/tcp_*mem entry values may help. | ||
376 | See the specific application manual and /usr/src/linux*/Documentation/ | ||
377 | networking/ip-sysctl.txt for more details. | ||
378 | |||
379 | |||
380 | Allocating Rx Buffers when Using Jumbo Frames | ||
381 | --------------------------------------------- | ||
382 | Allocating Rx buffers when using Jumbo Frames on 2.6.x kernels may fail if | ||
383 | the available memory is heavily fragmented. This issue may be seen with PCI-X | ||
384 | adapters or with packet split disabled. This can be reduced or eliminated | ||
385 | by changing the amount of available memory for receive buffer allocation, by | ||
386 | increasing /proc/sys/vm/min_free_kbytes. | ||
387 | |||
388 | |||
389 | Multiple Interfaces on Same Ethernet Broadcast Network | ||
390 | ------------------------------------------------------ | ||
391 | Due to the default ARP behavior on Linux, it is not possible to have | ||
392 | one system on two IP networks in the same Ethernet broadcast domain | ||
393 | (non-partitioned switch) behave as expected. All Ethernet interfaces | ||
394 | will respond to IP traffic for any IP address assigned to the system. | ||
395 | This results in unbalanced receive traffic. | ||
396 | |||
397 | If you have multiple interfaces in a server, do either of the following: | ||
398 | |||
399 | - Turn on ARP filtering by entering: | ||
400 | echo 1 > /proc/sys/net/ipv4/conf/all/arp_filter | ||
401 | |||
402 | - Install the interfaces in separate broadcast domains - either in | ||
403 | different switches or in a switch partitioned to VLANs. | ||
404 | |||
405 | |||
406 | UDP Stress Test Dropped Packet Issue | ||
407 | -------------------------------------- | ||
408 | Under small packets UDP stress test with 10GbE driver, the Linux system | ||
409 | may drop UDP packets due to the fullness of socket buffers. You may want | ||
410 | to change the driver's Flow Control variables to the minimum value for | ||
411 | controlling packet reception. | ||
412 | |||
413 | |||
414 | Tx Hangs Possible Under Stress | ||
415 | ------------------------------ | ||
416 | Under stress conditions, if TX hangs occur, turning off TSO | ||
417 | "ethtool -K eth0 tso off" may resolve the problem. | ||
418 | |||
419 | |||
203 | Support | 420 | Support |
204 | ======= | 421 | ======= |
205 | 422 | ||
206 | For general information and support, go to the Intel support website at: | 423 | For general information, go to the Intel support website at: |
207 | 424 | ||
208 | http://support.intel.com | 425 | http://support.intel.com |
209 | 426 | ||
427 | or the Intel Wired Networking project hosted by Sourceforge at: | ||
428 | |||
429 | http://sourceforge.net/projects/e1000 | ||
430 | |||
210 | If an issue is identified with the released source code on the supported | 431 | If an issue is identified with the released source code on the supported |
211 | kernel with a supported adapter, email the specific information related to | 432 | kernel with a supported adapter, email the specific information related |
212 | the issue to linux.nics@intel.com. | 433 | to the issue to e1000-devel@lists.sf.net |
diff --git a/Documentation/networking/mac80211_hwsim/README b/Documentation/networking/mac80211_hwsim/README new file mode 100644 index 000000000000..2ff8ccb8dc37 --- /dev/null +++ b/Documentation/networking/mac80211_hwsim/README | |||
@@ -0,0 +1,67 @@ | |||
1 | mac80211_hwsim - software simulator of 802.11 radio(s) for mac80211 | ||
2 | Copyright (c) 2008, Jouni Malinen <j@w1.fi> | ||
3 | |||
4 | This program is free software; you can redistribute it and/or modify | ||
5 | it under the terms of the GNU General Public License version 2 as | ||
6 | published by the Free Software Foundation. | ||
7 | |||
8 | |||
9 | Introduction | ||
10 | |||
11 | mac80211_hwsim is a Linux kernel module that can be used to simulate | ||
12 | arbitrary number of IEEE 802.11 radios for mac80211. It can be used to | ||
13 | test most of the mac80211 functionality and user space tools (e.g., | ||
14 | hostapd and wpa_supplicant) in a way that matches very closely with | ||
15 | the normal case of using real WLAN hardware. From the mac80211 view | ||
16 | point, mac80211_hwsim is yet another hardware driver, i.e., no changes | ||
17 | to mac80211 are needed to use this testing tool. | ||
18 | |||
19 | The main goal for mac80211_hwsim is to make it easier for developers | ||
20 | to test their code and work with new features to mac80211, hostapd, | ||
21 | and wpa_supplicant. The simulated radios do not have the limitations | ||
22 | of real hardware, so it is easy to generate an arbitrary test setup | ||
23 | and always reproduce the same setup for future tests. In addition, | ||
24 | since all radio operation is simulated, any channel can be used in | ||
25 | tests regardless of regulatory rules. | ||
26 | |||
27 | mac80211_hwsim kernel module has a parameter 'radios' that can be used | ||
28 | to select how many radios are simulated (default 2). This allows | ||
29 | configuration of both very simply setups (e.g., just a single access | ||
30 | point and a station) or large scale tests (multiple access points with | ||
31 | hundreds of stations). | ||
32 | |||
33 | mac80211_hwsim works by tracking the current channel of each virtual | ||
34 | radio and copying all transmitted frames to all other radios that are | ||
35 | currently enabled and on the same channel as the transmitting | ||
36 | radio. Software encryption in mac80211 is used so that the frames are | ||
37 | actually encrypted over the virtual air interface to allow more | ||
38 | complete testing of encryption. | ||
39 | |||
40 | A global monitoring netdev, hwsim#, is created independent of | ||
41 | mac80211. This interface can be used to monitor all transmitted frames | ||
42 | regardless of channel. | ||
43 | |||
44 | |||
45 | Simple example | ||
46 | |||
47 | This example shows how to use mac80211_hwsim to simulate two radios: | ||
48 | one to act as an access point and the other as a station that | ||
49 | associates with the AP. hostapd and wpa_supplicant are used to take | ||
50 | care of WPA2-PSK authentication. In addition, hostapd is also | ||
51 | processing access point side of association. | ||
52 | |||
53 | Please note that the current Linux kernel does not enable AP mode, so a | ||
54 | simple patch is needed to enable AP mode selection: | ||
55 | http://johannes.sipsolutions.net/patches/kernel/all/LATEST/006-allow-ap-vlan-modes.patch | ||
56 | |||
57 | |||
58 | # Build mac80211_hwsim as part of kernel configuration | ||
59 | |||
60 | # Load the module | ||
61 | modprobe mac80211_hwsim | ||
62 | |||
63 | # Run hostapd (AP) for wlan0 | ||
64 | hostapd hostapd.conf | ||
65 | |||
66 | # Run wpa_supplicant (station) for wlan1 | ||
67 | wpa_supplicant -Dwext -iwlan1 -c wpa_supplicant.conf | ||
diff --git a/Documentation/networking/mac80211_hwsim/hostapd.conf b/Documentation/networking/mac80211_hwsim/hostapd.conf new file mode 100644 index 000000000000..08cde7e35f2e --- /dev/null +++ b/Documentation/networking/mac80211_hwsim/hostapd.conf | |||
@@ -0,0 +1,11 @@ | |||
1 | interface=wlan0 | ||
2 | driver=nl80211 | ||
3 | |||
4 | hw_mode=g | ||
5 | channel=1 | ||
6 | ssid=mac80211 test | ||
7 | |||
8 | wpa=2 | ||
9 | wpa_key_mgmt=WPA-PSK | ||
10 | wpa_pairwise=CCMP | ||
11 | wpa_passphrase=12345678 | ||
diff --git a/Documentation/networking/mac80211_hwsim/wpa_supplicant.conf b/Documentation/networking/mac80211_hwsim/wpa_supplicant.conf new file mode 100644 index 000000000000..299128cff035 --- /dev/null +++ b/Documentation/networking/mac80211_hwsim/wpa_supplicant.conf | |||
@@ -0,0 +1,10 @@ | |||
1 | ctrl_interface=/var/run/wpa_supplicant | ||
2 | |||
3 | network={ | ||
4 | ssid="mac80211 test" | ||
5 | psk="12345678" | ||
6 | key_mgmt=WPA-PSK | ||
7 | proto=WPA2 | ||
8 | pairwise=CCMP | ||
9 | group=CCMP | ||
10 | } | ||
diff --git a/Documentation/networking/multiqueue.txt b/Documentation/networking/multiqueue.txt index ea5a42e8f79f..d391ea631141 100644 --- a/Documentation/networking/multiqueue.txt +++ b/Documentation/networking/multiqueue.txt | |||
@@ -3,19 +3,11 @@ | |||
3 | =========================================== | 3 | =========================================== |
4 | 4 | ||
5 | Section 1: Base driver requirements for implementing multiqueue support | 5 | Section 1: Base driver requirements for implementing multiqueue support |
6 | Section 2: Qdisc support for multiqueue devices | ||
7 | Section 3: Brief howto using PRIO or RR for multiqueue devices | ||
8 | |||
9 | 6 | ||
10 | Intro: Kernel support for multiqueue devices | 7 | Intro: Kernel support for multiqueue devices |
11 | --------------------------------------------------------- | 8 | --------------------------------------------------------- |
12 | 9 | ||
13 | Kernel support for multiqueue devices is only an API that is presented to the | 10 | Kernel support for multiqueue devices is always present. |
14 | netdevice layer for base drivers to implement. This feature is part of the | ||
15 | core networking stack, and all network devices will be running on the | ||
16 | multiqueue-aware stack. If a base driver only has one queue, then these | ||
17 | changes are transparent to that driver. | ||
18 | |||
19 | 11 | ||
20 | Section 1: Base driver requirements for implementing multiqueue support | 12 | Section 1: Base driver requirements for implementing multiqueue support |
21 | ----------------------------------------------------------------------- | 13 | ----------------------------------------------------------------------- |
@@ -32,84 +24,4 @@ netif_{start|stop|wake}_subqueue() functions to manage each queue while the | |||
32 | device is still operational. netdev->queue_lock is still used when the device | 24 | device is still operational. netdev->queue_lock is still used when the device |
33 | comes online or when it's completely shut down (unregister_netdev(), etc.). | 25 | comes online or when it's completely shut down (unregister_netdev(), etc.). |
34 | 26 | ||
35 | Finally, the base driver should indicate that it is a multiqueue device. The | ||
36 | feature flag NETIF_F_MULTI_QUEUE should be added to the netdev->features | ||
37 | bitmap on device initialization. Below is an example from e1000: | ||
38 | |||
39 | #ifdef CONFIG_E1000_MQ | ||
40 | if ( (adapter->hw.mac.type == e1000_82571) || | ||
41 | (adapter->hw.mac.type == e1000_82572) || | ||
42 | (adapter->hw.mac.type == e1000_80003es2lan)) | ||
43 | netdev->features |= NETIF_F_MULTI_QUEUE; | ||
44 | #endif | ||
45 | |||
46 | |||
47 | Section 2: Qdisc support for multiqueue devices | ||
48 | ----------------------------------------------- | ||
49 | |||
50 | Currently two qdiscs support multiqueue devices. A new round-robin qdisc, | ||
51 | sch_rr, and sch_prio. The qdisc is responsible for classifying the skb's to | ||
52 | bands and queues, and will store the queue mapping into skb->queue_mapping. | ||
53 | Use this field in the base driver to determine which queue to send the skb | ||
54 | to. | ||
55 | |||
56 | sch_rr has been added for hardware that doesn't want scheduling policies from | ||
57 | software, so it's a straight round-robin qdisc. It uses the same syntax and | ||
58 | classification priomap that sch_prio uses, so it should be intuitive to | ||
59 | configure for people who've used sch_prio. | ||
60 | |||
61 | In order to utilitize the multiqueue features of the qdiscs, the network | ||
62 | device layer needs to enable multiple queue support. This can be done by | ||
63 | selecting NETDEVICES_MULTIQUEUE under Drivers. | ||
64 | |||
65 | The PRIO qdisc naturally plugs into a multiqueue device. If | ||
66 | NETDEVICES_MULTIQUEUE is selected, then on qdisc load, the number of | ||
67 | bands requested is compared to the number of queues on the hardware. If they | ||
68 | are equal, it sets a one-to-one mapping up between the queues and bands. If | ||
69 | they're not equal, it will not load the qdisc. This is the same behavior | ||
70 | for RR. Once the association is made, any skb that is classified will have | ||
71 | skb->queue_mapping set, which will allow the driver to properly queue skb's | ||
72 | to multiple queues. | ||
73 | |||
74 | |||
75 | Section 3: Brief howto using PRIO and RR for multiqueue devices | ||
76 | --------------------------------------------------------------- | ||
77 | |||
78 | The userspace command 'tc,' part of the iproute2 package, is used to configure | ||
79 | qdiscs. To add the PRIO qdisc to your network device, assuming the device is | ||
80 | called eth0, run the following command: | ||
81 | |||
82 | # tc qdisc add dev eth0 root handle 1: prio bands 4 multiqueue | ||
83 | |||
84 | This will create 4 bands, 0 being highest priority, and associate those bands | ||
85 | to the queues on your NIC. Assuming eth0 has 4 Tx queues, the band mapping | ||
86 | would look like: | ||
87 | |||
88 | band 0 => queue 0 | ||
89 | band 1 => queue 1 | ||
90 | band 2 => queue 2 | ||
91 | band 3 => queue 3 | ||
92 | |||
93 | Traffic will begin flowing through each queue if your TOS values are assigning | ||
94 | traffic across the various bands. For example, ssh traffic will always try to | ||
95 | go out band 0 based on TOS -> Linux priority conversion (realtime traffic), | ||
96 | so it will be sent out queue 0. ICMP traffic (pings) fall into the "normal" | ||
97 | traffic classification, which is band 1. Therefore pings will be send out | ||
98 | queue 1 on the NIC. | ||
99 | |||
100 | Note the use of the multiqueue keyword. This is only in versions of iproute2 | ||
101 | that support multiqueue networking devices; if this is omitted when loading | ||
102 | a qdisc onto a multiqueue device, the qdisc will load and operate the same | ||
103 | if it were loaded onto a single-queue device (i.e. - sends all traffic to | ||
104 | queue 0). | ||
105 | |||
106 | Another alternative to multiqueue band allocation can be done by using the | ||
107 | multiqueue option and specify 0 bands. If this is the case, the qdisc will | ||
108 | allocate the number of bands to equal the number of queues that the device | ||
109 | reports, and bring the qdisc online. | ||
110 | |||
111 | The behavior of tc filters remains the same, where it will override TOS priority | ||
112 | classification. | ||
113 | |||
114 | |||
115 | Author: Peter P. Waskiewicz Jr. <peter.p.waskiewicz.jr@intel.com> | 27 | Author: Peter P. Waskiewicz Jr. <peter.p.waskiewicz.jr@intel.com> |
diff --git a/Documentation/networking/s2io.txt b/Documentation/networking/s2io.txt index 1e28e2ddb90a..c3d6b4d5d014 100644 --- a/Documentation/networking/s2io.txt +++ b/Documentation/networking/s2io.txt | |||
@@ -52,13 +52,10 @@ d. MSI/MSI-X. Can be enabled on platforms which support this feature | |||
52 | (IA64, Xeon) resulting in noticeable performance improvement(upto 7% | 52 | (IA64, Xeon) resulting in noticeable performance improvement(upto 7% |
53 | on certain platforms). | 53 | on certain platforms). |
54 | 54 | ||
55 | e. NAPI. Compile-time option(CONFIG_S2IO_NAPI) for better Rx interrupt | 55 | e. Statistics. Comprehensive MAC-level and software statistics displayed |
56 | moderation. | ||
57 | |||
58 | f. Statistics. Comprehensive MAC-level and software statistics displayed | ||
59 | using "ethtool -S" option. | 56 | using "ethtool -S" option. |
60 | 57 | ||
61 | g. Multi-FIFO/Ring. Supports up to 8 transmit queues and receive rings, | 58 | f. Multi-FIFO/Ring. Supports up to 8 transmit queues and receive rings, |
62 | with multiple steering options. | 59 | with multiple steering options. |
63 | 60 | ||
64 | 4. Command line parameters | 61 | 4. Command line parameters |