45 lines
1.1 KiB
ReStructuredText
45 lines
1.1 KiB
ReStructuredText
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.. _OPAL_PCI_SET_P2P:
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OPAL_PCI_SET_P2P
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================
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.. code-block:: c
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#define OPAL_PCI_SET_P2P 157
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int64_t opal_pci_set_p2p(uint64_t phbid_init, uint64_t phbid_target,
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uint64_t desc, uint16_t pe_number);
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/* PCI p2p descriptor */
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#define OPAL_PCI_P2P_ENABLE 0x1
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#define OPAL_PCI_P2P_LOAD 0x2
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#define OPAL_PCI_P2P_STORE 0x4
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The host calls this function to enable PCI peer-to-peer on the PHBs.
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Parameters
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----------
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``phbid_init``
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is the value from the PHB node ibm,opal-phbid property for the device initiating the p2p operation
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``phbid_target``
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is the value from the PHB node ibm,opal-phbid property for the device targeted by the p2p operation
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``desc``
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tells whether the p2p operation is a store (OPAL_PCI_P2P_STORE) or load (OPAL_PCI_P2P_LOAD). Can be both.
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OPAL_PCI_P2P_ENABLE enables/disables the setting
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``pe_number``
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PE number for the initiating device
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Return Values
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-------------
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:ref:`OPAL_SUCCESS`
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Configuration was successful
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:ref:`OPAL_PARAMETER`
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Invalid PHB or mode parameter
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:ref:`OPAL_UNSUPPORTED`
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Not supported by hardware
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