Filter
Top Products
3.15 Defining a Copy of the w3_eeprom Data Structure
The w3_eeprom data structure copy in the if_el driver’s el_softc
data structure consists of information about the hardware-specific
w3_eeprom data structure. The following code shows the declaration of this
device-specific data structure. If your device has an EEPROM, you might
want to save some or all of its contents in your softc data structure.
struct w3_eeprom eeprom; 1
1 Declares a copy of the w3_eeprom data structure and calls it eeprom.
3.16 Declaring the Simple Lock Data Structure
A network driver’s softc data structure contains the declaration of a
simple lock data structure. The if_el driver uses a simple lock to protect
the data integrity of the el_softc data structure on multiprocessor
systems. It also guarantees the sequence of register accesses that a CPU in
a multiprocessor system makes to the adapter. See
Writing Kernel Modules
for more information about locking in an SMP environment.
The following code shows the declaration of the simple lock data structure
in the if_el driver’s el_softc data structure:
decl_simple_lock_data(, el_softc_lock)
1
1 Uses the decl_simple_lock_data( ) routine to declare a simple lock
data structure as a member of the el_softc data structure. The simple
lock data structure is called el_softc_lock.
3–10 Defining the softc Data Structure