How can i find all instances of my device?

Hi,
I was wondering if anyone could tell me I can find all the instances of an ethernet card from a C program. At the moment I use a brute force approach, checking for each physical point of attachment by opening the driver /dev/mydriver and doing a putmsg DL_ATTACH_REQ with ppa= 0,1,2,etc., and checking to see if I get a DL_OK_ACK back.
Is there any more intelligent way to find this out?
Thanks in advance,
S.

Hi,
#include <sys/ddi.h>
#include <sys/sunddi.h>
int ddi_get_instance(dev_info_t *dip);
ddi_get_instance() returns the instance number of the device corresponding to dip.
The system assigns an instance number to every device. Instance numbers for devices attached to the same driver are unique. This provides a way for the system and the driver to uniquely identify one or more devices of the same type. The instance number is derived by the system from different properties for different device types in an implementation specific manner.
Once an instance number has been assigned to a device, it will remain the same even across reconfigurations and reboots. Therefore, instance numbers seen by a driver may not appear to be in consecutive order. For example, if dev-ice foo0 has been assigned an instance number of 0 and dev-ice foo1 has been assigned an instance number of 1, if
foo0 is removed, foo1 will continue to be associated with instance number 1 (even though foo1 is now the only device of its type on the system).
Refer more information man ddi_get_instance()
Regards,
Senthilkumar
Technical Support Engineer
Developer Technical Support
Sun Microsystems, Inc.
http://www.sun.com/developers/support

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