Figure 3–1: Typical softc Data Structure
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Common Information
Enhanced Hardware Management Information
Media State Information
Base Register
Multicast Table Information
Interrupt Handler ID
CSR Pointer Information
FIFO Maintenance Information
Broadcast Flag
Debug Flag
Interrupt and Timeout Information
Autosense Kernel Thread
Context Information
Polling Context Flag
w3_eeprom Structure
Simple Lock Structure
A single asterisk denotes information that all network device drivers provide in the associated softc data structure, and a double asterisk denotes information that is specific to the hardware or bus.
3.1 Defining Common Information
The common information in a local area network driver’s softc data structure is contained in the ether_driver data structure, which consists of information such as counter blocks, media state, media values, and so forth. The following code shows the declaration and definition of the common information in the if_el device driver’s el_softc data structure. Make sure that the common part of your softc data structure has the same declaration and definitions.
struct el_softc {
struct | ether_driver *is_ed; |
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