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