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39 .Nd "Intel(R) PRO/1000 Gigabit Ethernet adapter 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 Gigabit Ethernet adapters based on
58 the Intel 82540, 82541ER, 82541PI, 82542, 82543, 82544, 82545, 82546,
59 82546EB, 82546GB, 82547, 82571, 81572, 82573, and 82574 Ethernet
61 The driver supports Transmit/Receive checksum offload
62 and Jumbo Frames on all but 82542-based adapters.
63 Furthermore it supports TCP segmentation offload (TSO) on all adapters but
64 those based on the 82543, 82544 and 82547 controller chips.
65 For further hardware information, see the
67 included with the driver.
69 For questions related to hardware requirements,
70 refer to the documentation supplied with your Intel PRO/1000 adapter.
71 All hardware requirements listed apply to use with
74 Support for Jumbo Frames is provided via the interface MTU setting.
75 Selecting an MTU larger than 1500 bytes with the
77 utility configures the adapter to receive and transmit Jumbo Frames.
78 The maximum MTU size for Jumbo Frames is 16114.
80 This driver version supports VLANs.
83 driver supports the following media types:
84 .Bl -tag -width ".Cm 10baseT/UTP"
86 Enables auto-negotiation for speed and duplex.
88 Sets 10Mbps operation.
95 Sets 100Mbps operation.
102 Sets 1000Mbps operation.
105 mode is supported at this speed.
107 Sets 1000Mbps operation.
110 mode is supported at this speed.
115 driver supports the following media options:
116 .Bl -tag -width ".Cm full-duplex"
118 Forces full-duplex operation
120 Forces half-duplex operation.
129 is not specified, the driver defaults to
132 For more information on configuring this device, see
137 driver supports Gigabit Ethernet adapters based on the Intel
138 82540, 82541ER, 82541PI, 82542, 82543, 82544, 82545, 82546, 82546EB,
139 82546GB, 82547, 82571, 82572, 82573, and 82574 controller chips:
143 Intel PRO/1000 CT Network Connection (82547)
145 Intel PRO/1000 F Server Adapter (82543)
147 Intel PRO/1000 Gigabit Server Adapter (82542)
149 Intel PRO/1000 GT Desktop Adapter (82541PI)
151 Intel PRO/1000 MF Dual Port Server Adapter (82546)
153 Intel PRO/1000 MF Server Adapter (82545)
155 Intel PRO/1000 MF Server Adapter (LX) (82545)
157 Intel PRO/1000 MT Desktop Adapter (82540)
159 Intel PRO/1000 MT Desktop Adapter (82541)
161 Intel PRO/1000 MT Dual Port Server Adapter (82546)
163 Intel PRO/1000 MT Quad Port Server Adapter (82546EB)
165 Intel PRO/1000 MT Server Adapter (82545)
167 Intel PRO/1000 PF Dual Port Server Adapter (82571)
169 Intel PRO/1000 PF Quad Port Server Adapter (82571)
171 Intel PRO/1000 PF Server Adapter (82572)
173 Intel PRO/1000 PT Desktop Adapter (82572)
175 Intel PRO/1000 PT Dual Port Server Adapter (82571)
177 Intel PRO/1000 PT Quad Port Server Adapter (82571)
179 Intel PRO/1000 PT Server Adapter (82572)
181 Intel PRO/1000 T Desktop Adapter (82544)
183 Intel PRO/1000 T Server Adapter (82543)
185 Intel PRO/1000 XF Server Adapter (82544)
187 Intel PRO/1000 XT Server Adapter (82544)
190 Tunables can be set at the
192 prompt before booting the kernel or stored in
194 .Bl -tag -width indent
196 Number of receive descriptors allocated by the driver.
197 The default value is 256.
198 The 82542 and 82543-based adapters can handle up to 256 descriptors,
199 while others can have up to 4096.
201 Number of transmit descriptors allocated by the driver.
202 The default value is 256.
203 The 82542 and 82543-based adapters can handle up to 256 descriptors,
204 while others can have up to 4096.
205 .It Va hw.em.rx_int_delay
206 This value delays the generation of receive interrupts in units of
208 The default value is 0, since adapters may hang with this feature
210 .It Va hw.em.rx_abs_int_delay
212 .Va hw.em.rx_int_delay
213 is non-zero, this tunable limits the maximum delay in which a receive
214 interrupt is generated.
215 .It Va hw.em.tx_int_delay
216 This value delays the generation of transmit interrupts in units of
218 The default value is 64.
219 .It Va hw.em.tx_abs_int_delay
221 .Va hw.em.tx_int_delay
222 is non-zero, this tunable limits the maximum delay in which a transmit
223 interrupt is generated.
227 .It "em%d: Unable to allocate bus resource: memory"
228 A fatal initialization error has occurred.
229 .It "em%d: Unable to allocate bus resource: interrupt"
230 A fatal initialization error has occurred.
231 .It "em%d: watchdog timeout -- resetting"
232 The device has stopped responding to the network, or there is a problem with
233 the network connection (cable).
236 For general information and support,
237 go to the Intel support website at:
238 .Pa http://support.intel.com .
240 If an issue is identified with the released source code on the supported kernel
241 with a supported adapter, email the specific information related to the
243 .Aq freebsdnic@mailbox.intel.com .
256 device driver first appeared in
261 driver was written by
262 .An Intel Corporation Aq freebsdnic@mailbox.intel.com .
264 Hardware-assisted VLAN processing is disabled by default.
265 You can enable it on an