Start to write JMicron Driver.

• Helper functions
  • jme_reload_eeprom(): Which cause the MAC processor to place MAC Address to register.
    
  • j{read,write}32(): Register reading/writing wrapper.
• Basic layout.
  • pci_probe:
    • private data allocation
    • Getting ioport
    • Interface registration
    • Initialize hardware
    • Reading MAC Address
  • pci_remove
    • Interface un-registration
    • Free private data
    • Reset hardware

• Implement link status check routines.
  • ifstat can show correct cable link status.
• It'll freeze if IRQ generated on native driver.
• netdev→link_rc was initiallized in:
  • alloc_etherdev() → alloc_netdev() → netdev→link_rc = -EUNKNOWN_LINK_STATUS;

• Implement receive functions
• Fount out that we have very small memory poll(128K). Due to receive buffer allocation error. The original design tried to allocate 1024*MTU received buffers.

• Implement transmit functions
• netdev_tx_complete{_err}() called free_iob(). So we shouldn't do free_iob() both on successfully transmited or failed to deliver.