diff options
Diffstat (limited to 'doc/opal-api/opal-get-msi-39-40.rst')
| -rw-r--r-- | doc/opal-api/opal-get-msi-39-40.rst | 45 |
1 files changed, 25 insertions, 20 deletions
diff --git a/doc/opal-api/opal-get-msi-39-40.rst b/doc/opal-api/opal-get-msi-39-40.rst index dbc809f..14bd980 100644 --- a/doc/opal-api/opal-get-msi-39-40.rst +++ b/doc/opal-api/opal-get-msi-39-40.rst @@ -1,10 +1,11 @@ OPAL_GET_MSI_32 and OPAL_GET_MSI_64 ------------------------------------ +=================================== +:: -#define OPAL_GET_MSI_32 39 -#define OPAL_GET_MSI_64 40 + #define OPAL_GET_MSI_32 39 + #define OPAL_GET_MSI_64 40 -WARNING: following documentation is from old sources, and is possibly +**WARNING:** the 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. @@ -14,22 +15,26 @@ data to program into a PE PCIE function for a particular MVE and XIVE. The msi_address parameter returns the MSI DMA address and the msi_data parameter returns the MSI DMA message data value the PE uses to signal that interrupt. - The phb_id parameter is the value from the PHB node ibm,opal-phbid - property. - - The mve_number is the index of an MVE used to authorize this PE to this - MSI. For ibm,opal-ioda2 PHBs, the MVE number argument is ignored. - - The xive_number is the index of an XIVE that corresponds to a particular - DMA address and message data value this PE will signal as an MSI ro MSI-X. - - The msi_range parameter specifies the number of MSIs associated with the - in put MVE and XIVE, primarily for MSI-conventional Multiple Message - Enable > 1 MSI. MSI requires consecutive MSIs per MSI address, and each - MSI DMA address must be unique for any given consecutive power of 2 set - of 32 message data values,. which in turn select particular PHB XIVEs. - This value must be a power of 2 value in the range of 0 to 32. OPAL - returns opal_parameter for values outside of this range. +``phb_id`` + The ``phb_id`` parameter is the value from the PHB node ``ibm,opal-phbid`` + property. + +``mve_number`` + The ``mve_number`` is the index of an MVE used to authorize this PE to this + MSI. For ``ibm,opal-ioda2`` PHBs, the MVE number argument is ignored. + +``xive_number`` + The ``xive_number`` is the index of an XIVE that corresponds to a particular + DMA address and message data value this PE will signal as an MSI ro MSI-X. + +``msi_range`` + The msi_range parameter specifies the number of MSIs associated with the + in put MVE and XIVE, primarily for MSI-conventional Multiple Message + Enable > 1 MSI. MSI requires consecutive MSIs per MSI address, and each + MSI DMA address must be unique for any given consecutive power of 2 set + of 32 message data values,. which in turn select particular PHB XIVEs. + This value must be a power of 2 value in the range of 0 to 32. OPAL + returns opal_parameter for values outside of this range. For MSI conventional, the MSI address and message data returned apply to a power of 2 sequential set of XIVRs starting from the xive_number for the |