OPAL_PCI_GET_PRESENCE_STATE

Get PCI slot presence state

Parameters

uint64_t id
PCI slot ID
uint64_t data
memory buffer pointer for presence state

Calling

Retrieve PCI slot’s presence state. The detected presence means there are adapters inserted to the PCI slot. Otherwise, the PCI slot is regarded as an empty one. The typical use is to ensure there are adapters existing before probing the PCI slot in PCI hot add path. The retrieved presence state is stored in buffer pointed by @data.

Return Codes

OPAL_SUCCESS
PCI slot’s presence state is retrieved successfully
OPAL_PARAMETER
The indicated PCI slot isn’t found
OPAL_UNSUPPORTED
Presence retrieval not supported on the PCI slot