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32 .\" $FreeBSD: src/share/man/man4/ixgbe.4,v 1.2 2008/06/17 21:14:02 brueffer Exp $
34 .Dd September 24, 2017
39 .Nd "Intel(R) 10Gb Ethernet driver"
41 To compile this driver into the kernel,
42 place the following line in your
43 kernel configuration file:
44 .Bd -ragged -offset indent
48 Alternatively, to load the driver as a
49 module at boot time, place the following line in
51 .Bd -literal -offset indent
57 driver provides support for PCI Express 10Gb Ethernet adapters based on
63 Ethernet controller chips.
68 .Bl -item -offset indent -compact
70 Transmit/Receive checksum offload for IP/UDP/TCP.
75 TCP segmentation offload (TSO)
77 Receive side scaling (RSS)
79 Multiple tranmission queues
83 VLAN tag stripping and inserting
92 driver will try enabling as many reception queues and transmission queues
93 as are allowed by the number of CPUs in the system.
95 If multiple transmission queues are used,
96 the round-robin arbitration is performed among the transmission queues.
97 And if both TSO and multiple tranmission queues are used,
98 the round-robin arbitration between transmission queues is done at the
99 TCP segment boundary after the hardware segmentation is performed.
101 82598 supports 16 reception queues and 32 transmission queues.
102 MSI-X is not enabled due to hardware errata.
103 Under MSI or legacy interrupt mode,
104 2 reception queues are enabled for hardware RSS hash
105 and only 1 transmission queue is enable.
107 82599 and X540 supports 16 reception queues and 64 transmission queues.
108 MSI-X is enable by default.
110 due to the number of MSI-X vectors is 64,
111 at most 16 reception queues and 32 transmission queues will be enabled
116 driver supports the following media types:
117 .Bl -tag -width ".Cm autoselect"
119 Enables auto-negotiation for speed and duplex.
124 driver supports the following media options:
125 .Bl -tag -width ".Cm forcepause"
127 Enable flow control PAUSE reception.
129 Enable flow control PAUSE transmission.
131 Force flow control PAUSE operation as configured by
138 For more information on configuring this device, see
147 driver supports Gigabit Ethernet adapters based on the Intel
156 Intel 82599EB 10 Gigabit Ethernet Controller
158 Intel 82598EB 10 Gigabit Ethernet Controller
160 Intel Ethernet Converged Network Adapter X520-SR1
162 Intel Ethernet Converged Network Adapter X520-SR2
164 Intel Ethernet Converged Network Adapter X520-DA2
166 Intel Ethernet Converged Network Adapter X520-LR1
168 Intel 82599ES 10 Gigabit Ethernet Controller
170 Intel 10 Gigabit AF DA Dual Port Server Adapter
172 Intel 10 Gigabit AT Server Adapter
174 Intel 10 Gigabit AT2 Server Adapter
176 Intel 10 Gigabit CX4 Dual Port Server Adapter
178 Intel 10 Gigabit XF LR Server Adapter
180 Intel 10 Gigabit XF SR Dual Port Server Adapter
182 Intel 10 Gigabit XF SR Server Adapter
184 Intel Ethernet Converged Network Adapter X540-T1
186 Intel Ethernet Converged Network Adapter X540-T2
188 Intel Ethernet Controller X540-AT2
190 Intel 82599EN 10 Gigabit Ethernet Controller
192 Intel Ethernet Converged Network Adapter X520-DA1
194 Intel Ethernet Converged Network Adapter X520-DA4
196 Intel Ethernet Converged Network Adapter X520-QDA1
198 Intel Ethernet Converged Network Adapter X520-T2
200 Intel Ethernet Controller X710-AM2
202 Intel Ethernet Converged Network Adapter X710-DA2
204 Intel Ethernet Converged Network Adapter X710-DA4
207 Tunables can be set at the
209 prompt before booting the kernel or stored in
212 is the device unit number.
213 .Bl -tag -width ".Va hw.ixY.unsupported_sfp"
214 .It Va hw.ix.rxd Va hw.ixY.rxd
215 Number of receive descriptors allocated by the driver.
216 The default value is 2048.
218 and the maximum is 4096.
219 .It Va hw.ix.txd Va hw.ixY.txd
220 Number of transmit descriptors allocated by the driver.
221 The default value is 2048.
223 and the maximum is 4096.
224 .It Va hw.ix.rxr Va hw.ixY.rxr
225 This tunable specifies the number of reception queues could be enabled.
226 Maximum allowed value for these tunables is device specific
227 and it must be power of 2 aligned.
228 Setting these tunables to 0 allows the driver to make
229 as many reception queues ready-for-use as allowed by the number of CPUs.
230 .It Va hw.ix.txr Va hw.ixY.txr
231 This tunable specifies the number of transmission queues could be enabled.
232 Maximum allowed value for these tunables is device specific
233 and it must be power of 2 aligned.
234 Setting these tunables to 0 allows the driver to make
235 as many transmission queues ready-for-use as allowed by the number of CPUs.
236 .It Va hw.ix.msix.enable Va hw.ixY.msix.enable
238 the driver will use MSI-X if it is supported.
239 This behaviour can be turned off by setting this tunable to 0.
240 .It Va hw.ix.msi.enable Va hw.ixY.msi.enable
241 If MSI-X is disabled and MSI is supported,
242 the driver will use MSI.
243 This behavior can be turned off by setting this tunable to 0.
244 .It Va hw.ixY.msi.cpu
246 it specifies the MSI's target CPU.
247 .It Va hw.ix.unsupported_sfp
249 this driver does not allow "unsupported" SFP modules.
250 This behavior can be changed by setting this tunable to 1.
251 .It Va hw.ix.flow_ctrl Va hw.ixY.flow_ctrl
252 The default flow control settings.
253 Supported values are:
254 rxpause (only enable PAUSE reception),
255 txpause (only enable PAUSE transmission),
256 full (enable PAUSE reception and transmission),
257 none (disable flow control PAUSE operation),
258 force-rxpause (force PAUSE reception),
259 force-txpause (force PAUSE transmission),
260 force-full (forcefully enable PAUSE reception and transmission),
261 force-none (forcefully disable flow control PAUSE operation).
263 .It Va hw.ix.direct_input
268 the driver will handle input packets directly,
269 instead of queuing input packets for further processing.
270 The direct input packets handling improves performance and
274 A number of per-interface variables are implemented in the
279 .Bl -tag -width "rxtx_intr_rate"
281 Number of reception queues could be enabled (read-only).
288 Number of reception queues being used (read-only).
290 Number of transmission queues could be enabled (read-only).
297 Number of transmission queues being used (read-only).
299 Number of descriptors per reception queue (read-only).
306 Number of descriptors per transmission queue (read-only).
312 .It Va rxtx_intr_rate
313 If MSI or legacy interrupt is used,
314 this sysctl controls the highest possible frequency
315 that interrupt could be generated by the device.
317 this sysctl controls the highest possible frequency
318 that interrupt could be generated by the MSI-X vectors,
319 which aggregate transmission queue and reception queue procecssing.
320 It is 8000 by default (125us).
323 this sysctl controls the highest possible frequency
324 that interrupt could be generated by the MSI-X vectors,
325 which only process reception queue.
326 It is 8000 by default (125us).
329 this sysctl controls the highest possible frequency
330 that interrupt could be generated by the MSI-X vectors,
331 which only process transmission queue.
332 It is 6000 by default (~150us).
335 this sysctl controls the highest possible frequency
336 that interrupt could be generated by the MSI-X vectors,
337 which only process chip status changes.
338 It is 8000 by default (125us).
340 Transmission interrupt is asked to be generated upon every
342 transmission descritors having been setup.
343 The default value is 1/16 of the number of transmission descriptors per queue.
345 The number of transmission descriptors should be setup
346 before the hardware register is written.
347 Setting this value too high will have negative effect
348 on transmission timeliness.
349 Setting this value too low will hurt overall transmission performance
350 due to the frequent hardware register writing.
351 The default value is 8.
353 The number of reception descriptors should be setup
354 before the hardware register is written.
355 Setting this value too high will make device drop incoming packets.
356 Setting this value too low will hurt overall reception performance
357 due to the frequent hardware register writing.
358 The default value is 32.
361 .Va hw.ix.direct_input .
363 needs to be turned off and turned on again to make this variable take effect.
377 device driver first appeared in
382 driver was written by
383 .An Intel Corporation Aq Mt freebsdnic@mailbox.intel.com .