Returns the parameters required to issue an ent_fastwrt call.
The CIO_GET_FASTWRT operation returns the parameters required to issue the kernel-mode fast write for the Ethernet adapter. The parameters are returned in the cio_get_fastwrt structure, which is defined in the /usr/include/sys/comio.h file. The arg pointer points to the cio_get_fastwrt structure, which contains the following fields:
|status||Indicates the status condition that occurred; either CIO_OK or CIO_INV_CMD.|
|fastwrt_fn||Indicates the address of the fast write function.|
|devno||Specifies major and minor numbers of the device.|
The CIO_GET_FASTWRT operation can be called from a kernel-mode process only.
|EINVAL||Indicates that a parameter is not valid.|
|ENODEV||Indicates that a minor number is not valid.|
|ENXIO||Indicates an attempt to use an unconfigured device.|
|EPERM||Indicates the calling process is a user-mode process.|
|EBUSY||Indicates the maximum number of opens was exceeded.|
The CIO_GET_FASTWRT operation works with an Ethernet High-Performance LAN adapter that has been correctly configured for use on a qualified network. Consult adapter specifications for more information on configuring the network adapter and network qualifications.
The entwrite entry point, ent_fastwrt entry point.