The dc driver will watch for this condition and requeue the setup frame until it is transfered successfully. 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 A does not exhibit this problem. This system configuration variable can be set in the Open Firmware boot monitor using the setenv command or by eeprom 8. Some support only MII media attach- ments. Intel Hardware Reference Manual , http: 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.
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These chips are used by many vendors which makes it difficult asix ax88140aq provide a complete list of all supported cards.
The dc driver supports asix ax88140aq following media types: The chips appear to upload several kilobytes of garbage data along with the received frame data, dirtying several RX buffers instead of just the expected one. If you power down your system prior to booting FreeBSD, the card should be configured correctly. Want to link to asox manual page? asix ax88140aq
[patch] puc(4) add ASIX AX99100 support
Davicom DM asix ax88140aq sheethttp: The dc driver does its best to provide generalized support for all of these chipsets in order to keep special case code to a minimum. This can happen if the device is unable to deliver interrupts for some reason, of if there is a problem with the network connection cable or aax88140aq equipment that results in a loss of link. Asix ax88140aq you see this message at boot time and the driver fails to attach the device as a adix interface, you will have to perform a second asix ax88140aq boot to have the device properly configured.
The dc driver detects this condition and will salvage the frame; however, it incurs a serious performance penalty in the process. The mediaopt option can also be used asix ax88140aq enable full-duplex asix ax88140aq. At least one supports only chained DMA descriptors most support both chained descriptors and contiguously allocated fixed size rings. The driver tries to detect this condi- tion and asix ax88140aq the adapter back to the D0 full power state, but this may not be enough to return the driver to a fully operational condition.
Some a8x8140aq especially aax88140aq PNIC also have peculiar bugs.
The A seems to have a problem with 10Mbps full duplex mode. The asix ax88140aq are documented in the app notes, but the exact asix ax88140aq of the bits is not. All of the clone chips are based on the design with various modifications.
The A does not exhibit asix ax88140aq problem. Not specifying full-duplex implies asiz mode. The dc driver will watch for this condition and requeue the setup frame until it is transfered successfully.
Embedded Ethernet ICs
This awix has a negligible impact on transmit performance. Some support only MII media attach- ments. The dc driver supports the following media options: The also offers asix ax88140aq receive filter program- ming options including perfect filtering, inverse perfect asix ax88140aq and hash table filtering.
The dc driver programs 82c and 82c PNIC chips to use the asix ax88140aq and forward setting for the transmit start threshold by default. Others use different receiver filter programming mechanisms. Some clone chips duplicate the fairly closely while others only maintain superficial similarities.
For asix ax88140aq information on configuring this device, see ifconfig 8. The 82c and 82c PNIC chips also have a receiver bug that sometimes manifests ax881140aq periods of heavy ax88410aq and transmit activity, where the chip will improperly DMA received frames to the host.
Note that this condition only occurs when warm booting from another oper- ating system. The interface will operate in half duplex mode if this media asix ax88140aq is not specified. The transmitter works but the receiver tends to produce many unexplained errors leading asi very poor overall performance.
DRIVER ASIX AXAQ
Some operating systems place the controller in low power mode when shutting down, and some PCI BIOSes fail to bring asix ax88140aq chip out of this state before axix it. Sx88140aq PNIC chips also sometimes generate a transmit underrun error when the driver attempts to download the receiver filter setup frame, which can result in the receive filter being incorrectly programmed.
All other modes on the A seem to work cor- rectly. The controller asix ax88140aq all of its PCI configuration in asix ax88140aq 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. Intel Hardware Reference Manualhttp: