40 lines
955 B
ReStructuredText
40 lines
955 B
ReStructuredText
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.. _OPAL_PCI_GET_PRESENCE_STATE:
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OPAL_PCI_GET_PRESENCE_STATE
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===========================
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.. code-block: c
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#define OPAL_PCI_GET_PRESENCE_STATE 119
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int64_t opal_pci_get_presence_state(uint64_t id, uint64_t data);
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Get PCI slot presence state
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Parameters
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----------
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``uint64_t id``
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PCI slot ID
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``uint64_t data``
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memory buffer pointer for presence state
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Calling
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-------
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Retrieve PCI slot's presence state. The detected presence means there are
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adapters inserted to the PCI slot. Otherwise, the PCI slot is regarded as
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an empty one. The typical use is to ensure there are adapters existing
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before probing the PCI slot in PCI hot add path. The retrieved presence
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state is stored in buffer pointed by @data.
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Return Codes
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------------
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:ref:`OPAL_SUCCESS`
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PCI slot's presence state is retrieved successfully
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:ref:`OPAL_PARAMETER`
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The indicated PCI slot isn't found
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:ref:`OPAL_UNSUPPORTED`
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Presence retrieval not supported on the PCI slot
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