This function performs driver-like IOCTL functions on shared system devices.
There are multiple reasons for introducing a new API signature:
Note: This API is a new version of existing API XPm_DevIoctl API. It supports all the IOCTL functions supported by the old API and it adds support for a couple new ones. Users should migrate to using the new API signature in their applications. The older API will be deprecated and support for it may be removed in future releases.
- The old API had fixed number of payload arguments, the new one supports variable length of payload buffer for forward compatibility
- To maintain backwards compatibility for old API
- For scalability reasons when support for "large payload" is introduced
Prototype
XStatus XPm_DevIoctl2(u32 DeviceId, pm_ioctl_id IoctlId, const u32 *Payload, u32 PayloadSize, u32 *const Response, u32 ResponseSize);Parameters
The following table lists the XPm_DevIoctl2 function arguments.
| Type | Name | Description |
|---|---|---|
| u32 | DeviceId | ID of the device |
| pm_ioctl_id | IoctlId | IOCTL function ID |
| const u32 * | Payload | Payload buffer |
| u32 *const | Response | Response buffer for Ioctl Response |
| u32 | PayloadSize | Payload buffer size |
| u32 | ResponseSize | Response buffer size |