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OPAL_PCI_GET_PHB_DIAG_DATA2
===========================
Get PCI diagnostic data from a given PHB
Parameters
----------
``uint64_t phb_id``
the ID of the PHB you want to retrieve data from
``void *diag_buffer``
an allocated buffer to store diag data in
``uint64_t diag_buffer_len``
size in bytes of the diag buffer
Calling
-------
Retrieve the PHB's diagnostic data. The diagnostic data is stored in the
buffer pointed by @diag_buffer. Different PHB versions will store different
diagnostics, defined in include/opal-api.h as ``struct OpalIo<PHBVer>ErrorData``.
``OPAL_PCI_GET_PHB_DIAG_DATA`` is deprecated and ``OPAL_PCI_GET_PHB_DIAG_DATA2`` should be used instead.
Return Codes
------------
OPAL_SUCCESS
Diagnostic data has been retrieved and stored successfully
OPAL_PARAMETER
The given buffer is too small to store the diagnostic data
OPAL_HARDWARE
The PHB is in a broken state and its data cannot be retreived
OPAL_UNSUPPORTED
Diagnostic data is not implemented for this PHB type
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