2 .\" Bill Paul <wpaul@windriver.com>. All rights reserved.
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32 .\" $DragonFly: src/share/man/man4/re.4,v 1.8 2008/10/09 13:45:16 sephe Exp $
39 .Nd "RealTek 8139C+/8169/816xS/811xS/8101E PCI/PCIe Ethernet adapter driver"
44 Alternatively, to load the driver as a module at boot time, place the
46 .Pa /boot/loader.conf :
47 .Bd -literal -offset indent
53 driver provides support for various NICs based on the RealTek
54 RTL8139C+, RTL8169, RTL8169S, RTL8110S, RTL8168S, RTL8111S and RTL8101E
55 PCI and PCIe ethernet controllers.
59 are capable of 10 and 100Mbps speeds over CAT5 cable.
62 are capable of 10, 100 and 1000Mbps operation.
64 All NICs supported by the
66 driver have TCP/IP checksum offload and hardware VLAN tagging/insertion
67 features, and use a descriptor-based DMA mechanism. They are also
68 capable of TCP large send (TCP segmentation offload).
70 The 8139C+ is a single-chip solution combining both a 10/100 MAC and PHY.
71 The 8169 is a 10/100/1000 MAC only, requiring a GMII or TBI external PHY.
72 The 8169S and 8110S are single-chip devices containing both a 10/100/1000
73 MAC and 10/100/1000 copper PHY. Standalone 10/100/1000 cards are available
74 in both 32-bit PCI and 64-bit PCI models. The 8110S is designed for
75 embedded LAN-on-motherboard applications.
77 The 8169, 8169S and 8110S also support jumbo frames, which can be configured
78 via the interface MTU setting.
79 Selecting an MTU larger than 1500 bytes with the
81 utility configures the adapter to receive and transmit jumbo frames.
82 The maximum MTU setting for Jumbo Frames is 7426.
83 This value coincides with the maximum Jumbo Frames size of 7440.
87 driver supports the following media types:
88 .Bl -tag -width 10baseTXUTP
90 Enable autoselection of the media type and options.
91 The user can manually override
92 the autoselected mode by adding media options to
99 option can also be used to select either
105 Set 100Mbps (fast ethernet) operation.
109 option can also be used to select either
115 Set 1000baseT operation over twisted pair.
116 The RealTek gigE chips support 1000Mbps in
119 .\" .It Cm 1000baseSX
120 .\" Set 1000Mbps (gigabit ethernet) operation.
125 .\" modes are supported.
130 driver supports the following media options:
131 .Bl -tag -width full-duplex
133 Force full duplex operation.
135 Force half duplex operation.
138 For more information on configuring this device, see
145 A number of per-interface variables are implemented in the
150 .Bl -tag -width ".Va rx_desc_count"
152 Number of RX descriptors (read-only).
154 .Va hw.re.rx_desc_count
157 Number of TX descriptors (read-only).
159 .Va hw.re.tx_desc_count
162 Interrupt moderation type.
163 0 means disable interrupt moderation.
164 1 means using simulated interrupt moderation (default).
165 2 means using hardware interrupt moderation,
166 if hardware supports it.
167 Due to lack of proper document,
168 hardware interrupt moderation (2) may not work as expected.
173 it controls interrupt moderation time (unit: 1us).
174 It will not have any effect,
178 By default, it is set to 75us for PCIe controllers and
179 125us for PCI controllers.
181 If the controller does not support hardware interrupt moderation,
182 then this sysctl node will not exist.
186 it controls TX interrupt moderation time (unit: 25us).
187 It will not have any effect,
191 It is set to 5 (125us) by default.
192 Due to lack of chip document,
193 it may not work reliably.
195 If the controller does not support hardware interrupt moderation,
196 then this sysctl node will not exist.
200 it controls RX interrupt moderation time (unit: 25us).
201 It will not have any effect,
205 It is set to 2 (50us) by default.
206 Due to lack of chip document,
207 it may not work reliably.
212 driver supports RealTek RTL8139C+, RTL8169, RTL816xS, RTL811xS,
213 and RTL8101E based Fast Ethernet and Gigabit Ethernet adapters including:
217 Alloy Computer Products EtherGOLD 1439E 10/100 (8139C+)
219 Compaq Evo N1015v Integrated Ethernet (8139C+)
221 Corega CG-LAPCIGT Gigabit Ethernet (8169S)
223 D-Link DGE-528(T) Gigabit Ethernet (8169S)
225 Gigabyte 7N400 Pro2 Integrated Gigabit Ethernet (8110S)
227 LevelOne GNC-0105T (8169S)
229 LinkSys EG1032 (32-bit PCI)
231 PLANEX COMMUNICATIONS Inc.\& GN-1200TC (8169S)
233 Xterasys XN-152 10/100/1000 NIC (8169)
237 .It "re%d: couldn't map ports"
238 A fatal initialization error has occurred.
239 .It "re%d: couldn't map interrupt"
240 A fatal initialization error has occurred.
241 .It "re%d: watchdog timeout"
242 The device has stopped responding to the network, or there is a problem with
243 the network connection (cable).
255 .%T RealTek Semiconductor RTL8139C+, RTL8169, RTL8169S and RTL8110S datasheets
256 .%O http://www.realtek.com.tw
261 device driver first appeared in
268 driver was written by
269 .An Bill Paul Aq wpaul@windriver.com .
271 The Xterasys XN-152 32-bit PCI NIC, which uses the RTL8169 MAC and
272 Marvell 88E1000 PHY, has a defect that causes DMA corruption
273 if the board is plugged into a 64-bit PCI slot. The defect
274 lies in the board design, not the chip itself: the PCI REQ64# and ACK64#
275 lines should be pulled high, but they are not. The result is that the
276 8169 chip is tricked into performing 64-bit DMA transfers even though
277 a 64-bit data path between the NIC and the bus does not actually exist.
279 Unfortunately, it is not possible to correct this problem in software,
280 however it is possible to detect it. When the
282 driver is loaded, it will run a diagnostic routine designed to
283 validate DMA operation by placing the chip in digital loopback mode
284 and initiating a packet transmission. If the card functions properly,
285 the transmitted data will
286 be echoed back unmodified. If the echoed data is corrupt, the driver
287 will print an error message on the console and abort the device attach. The
288 user should insure the NIC is installed in a 32-bit PCI slot to