Note: This function is supported in AIX® 5.1 and earlier only.
Provides the attributes of the sol_fastwrt entry point.
The CIO_GET_FASTWRT operation provides the attributes of the Serial Optical Link (SOL) device driver's sol_fastwrt entry point.
For the CIO_GET_FASTWRT operation, the arg parameter points to the cio_get_fastwrt structure. This structure is defined in the /usr/include/sys/comio.h file and contains the following fields:
| Field | Description |
|---|---|
| status | Returns one of the following possible status values:
|
| fastwrt_fn | Specifies the function address that can be called to issue a fast path write. |
| chan | Specifies the channel number assigned by the device driver's mpx routine. |
| devno | Specifies major and minor device numbers for the device driver, also known as the dev_t. |
The CIO_GET_FASTWRT operation works with a Serial Link Adapter and Serial Optical Channel Converter that have been correctly configured for use on a qualified network. Consult hardware specifications for more information on configuring hardware and network qualifications.
| Item | Description |
|---|---|
| EACCES | Illegal call from kernel user. |
| EFAULT | Indicates that an address was not valid. |
| EINVAL | Indicates that a parameter was not valid. |
| ENODEV | Indicates that a minor number was not valid. |