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Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):
if_pcn_load="YES"
The PCnet/PCI chips include a 100Mbps Ethernet MAC and support both a serial and MII-compliant transceiver interface. They use a bus master DMA and a scatter/gather descriptor scheme. The AMD chips provide a mechanism for zero-copy receive, providing good performance in server environments. Receive address filtering is provided using a single perfect filter entry for the station address and a 64-bit multicast hash table.
The pcn driver supports the following media types:
| autoselect | Enable autoselection of the media type and options. The user can manually override the autoselected mode by adding media options to rc.conf(5). |
| 10baseT/UTP | |
| Set 10Mbps operation. The ifconfig(8) mediaopt option can also be used to select either 'full-duplex' or 'half-duplex' modes. | |
| 100baseTX | Set 100Mbps (Fast Ethernet) operation. The ifconfig(8) mediaopt option can also be used to select either 'full-duplex' or 'half-duplex' modes. |
The pcn driver supports the following media options:
| full-duplex | |
| Force full duplex operation. | |
| half-duplex | |
| Force half duplex operation. | |
For more information on configuring this device, see ifconfig(8).
| pcn%d: couldn't map ports/memory | A fatal initialization error has occurred. |
| pcn%d: couldn't map interrupt | A fatal initialization error has occurred. |
| pcn%d: watchdog timeout | The device has stopped responding to the network, or there is a problem with the network connection (e.g.amp; a cable fault). |
| pcn%d: no memory for rx list | The driver failed to allocate an mbuf for the receiver ring. |
| pcn%d: no memory for tx list | The driver failed to allocate an mbuf for the transmitter ring when allocating a pad buffer or collapsing an mbuf chain into a cluster. |
| pcn%d: chip is in D3 power state -- setting to D0 |
This message applies only to adapters which support power
management.
Some operating systems place the controller in low power
mode when shutting down, and some PCI BIOSes fail to bring the chip
out of this state before configuring it.
The controller loses all of
its PCI configuration in the D3 state, so if the BIOS does not set
it back to full power mode in time, it will not be able to configure it
correctly.
The driver tries to detect this condition and bring
the adapter back to the D0 (full power) state, but this may not be
enough to return the driver to a fully operational condition.
If
you see this message at boot time and the driver fails to attach
the device as a network interface, you will have to perform a
warm boot to have the device properly configured.
Note that this condition only occurs when warm booting from another operating system. If you power down your system prior to booting FreeBSD , the card should be configured correctly. |
AMD PCnet/FAST, PCnet/FAST+ and PCnet/Home datasheets,
| PCN (4) | October 24, 2018 |
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