OPAL_PCI_SET_MVE_ENABLE

#define OPAL_PCI_SET_MVE_ENABLE                      34

int64_t opal_pci_set_mve_enable(uint64_t phb_id, uint32_t mve_number, uint32_t state);

enum OpalMveEnableAction {
     OPAL_DISABLE_MVE = 0,
     OPAL_ENABLE_MVE = 1
};

WARNING: following documentation is from old sources, and is possibly not representative of OPALv3 as implemented by skiboot. This should be used as a starting point for full documentation.

The host calls this function to enable or disable an MVE to respond to an MSI DMA address and message data value.

phb_id

is the value from the PHB node ibm,opal-phbid property.

mve_number

is the index, from 0 to ibm,opal,ibm-num-msi-ports minus1

state

A ‘1’ value of the state parameter indicates to enable the MVE and a ‘0’ value indicates to disable the MVE.

This call sets the MVE to an enabled (1) or disabled (0) state.

Return value:

if (!phb)
        return OPAL_PARAMETER;
if (!phb->ops->set_mve_enable)
        return OPAL_UNSUPPORTED;