# Realtek RTL8169 - emllRTL8169

The parameters to the Real-time Ethernet Driver Realtek RTL8169 are setup-specific. The function `CreateLinkParmsFromCmdLineRTL8169()` in [`EcSelectLinkLayer.cpp`](_downloads/bf62c71a4a7e317930818b9da4a9815c/EcSelectLinkLayer.cpp) demonstrates how to initialize the Real-time Ethernet Driver instance.

### struct EC_T_LINK_PARMS_RTL8169

### Public Members

### [EC_T_LINK_PARMS](emll_init.html.md#_CPPv415EC_T_LINK_PARMS) linkParms

Common link parameters. Signature must be set to EC_LINK_PARMS_SIGNATURE_RTL8169. 

### [EC_T_BOOL](toc_api.html.md#_CPPv49EC_T_BOOL) bNotUseDmaBuffers

EC_FALSE: Use buffers from DMA for receive (default), EC_TRUE: use buffers from heap for receive. EcLinkAllocSendFrame is not supported if bNotUseDmaBuffers = EC_TRUE. 

### [EC_T_BOOL](toc_api.html.md#_CPPv49EC_T_BOOL) bAckErrInIrq

Acknowledge errors in interrupt handler 

### [EC_T_DWORD](toc_api.html.md#_CPPv410EC_T_DWORD) dwRxBuffers

Receive buffer count. Must be a power of 2, maximum 1024. 

### [EC_T_DWORD](toc_api.html.md#_CPPv410EC_T_DWORD) dwTxBuffers

Transmit buffer count. Must be a power of 2, maximum 1024. 

### [EC_T_BOOL](toc_api.html.md#_CPPv49EC_T_BOOL) bNoPhyAccess

Don’t use MDIO to set up the PHY 

## RTL8169 usage under Linux

Because the Linux Kernel module de-initializes the PHY on unloading, Linux must be prevented from loading the r8169 module on startup.

## Supported PCI devices

<!-- -*- mode: rst -*- -->

RealTek RTL8169 PCI specific definitions (VendorId, DeviceId)