Intel Ethernet i217: Difference between revisions

#define INTEL_VEND 0x8086 // Vendor ID for Intel

#define E1000_DEV 0x100E // Device ID for the e1000 Qemu, Bochs, and VirtualBox emmulated NICs

#define E1000_I217 0x153A // Device ID for Intel I217

#define E1000_82577LM 0x10EA // Device ID for Intel 82577LM

</source>

Finally we define the sendPacket method as follows

<source lang="c">

int E1000::sendPacket(const void * p_data, uint16_t p_len)

{

tx_descs[tx_cur]->addr = (uint64_t)p_data;

tx_descs[tx_cur]->length = p_len;

tx_descs[tx_cur]->cmd = CMD_EOP | CMD_IFCS | CMD_RS | CMD_RPS;

tx_descs[tx_cur]->status = 0;

uint8_t old_cur = tx_cur;

tx_cur = (tx_cur + 1) % E1000_NUM_TX_DESC;

writeCommand(REG_TXDESCTAIL, tx_cur);

while(!(tx_descs[old_cur]->status & 0xff));

return 0;

}

</source>

This is an example of how to instantiate an object of this class and startup you driver. I assume that you have scanned your PCI buses and loaded the found devices parameters into some data structures; in our example this is done by the PCIConfigManager class, which is outside the scope of this tutorial

<source lang="c">

pciConfigHeaderManager.initialize(); // Initialize the PCIConfigHeaderManager Object and scan PCI devices

if ( e1000PCIConfigHeader == NULL ) e1000PCIConfigHeader = pciConfigHeaderManager.getPCIDevice(INTEL_VEND,E1000_I217);

if ( e1000PCIConfigHeader == NULL ) e1000PCIConfigHeader = pciConfigHeaderManager.getPCIDevice(INTEL_VEND,E1000_82577LM);

if ( e1000PCIConfigHeader != NULL )

{

E1000 * e1000 = new E1000(e1000PCIConfigHeader);

if (!e1000->start())

{

// Error starting the NIC

}

}

else

{

// Intel cards not found

}