blob: d7be1147541bf8e41f4d7e0ad0a231126d18c1b1 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
.. _OPAL_PCI_SET_P2P:
OPAL_PCI_SET_P2P
================
.. code-block:: c
#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
----------
``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
-------------
:ref:`OPAL_SUCCESS`
Configuration was successful
:ref:`OPAL_PARAMETER`
Invalid PHB or mode parameter
:ref:`OPAL_UNSUPPORTED`
Not supported by hardware
|