Altera Arria 10 Avalon-ST - Manual (Page 55)

Parameter Value Description
Data link layer
active reporting
On/Off
Turn On this parameter for a downstream port, if the
component supports the optional capability of reporting the
DL_Active state of the Data Link Control and Management
State Machine. For a hot-plug capable downstream port (as
indicated by the
Hot Plug Capable
field of the
Slot
Capabilities
register), this parameter must be turned On.
For upstream ports and components that do not support this
optional capability, turn Off this option. This parameter is
only supported for the Arria 10 Hard IP for PCI Express in
Root Port mode.
Surprise down
reporting
On/Off
When this option is On, a downstream port supports the
optional capability of detecting and reporting the surprise
down error condition. This parameter is only supported for
the Arria 10 Hard IP for PCI Express in Root Port mode.
Slot clock
configuration
On/Off When On, indicates that the Endpoint or Root Port uses the
same physical reference clock that the system provides on the
connector. When Off, the IP core uses an independent clock
regardless of the presence of a reference clock on the
connector.
MSI and MSI-X Capabilities
Table 4-9: MSI and MSI-X Capabilities
Parameter Value Description
MSI messages
requested
1, 2, 4, 8, 16, 32 Specifies the number of messages the Application Layer can
request. Sets the value of the
Multiple Message Capable
field of the
Message Control
register, 0x050[31:16].
MSI-X Capabilities
Implement MSI-
X
On/Off When On, enables the MSI-X functionality.
Bit Range
Table size [10:0] System software reads this field to determine the MSI-X Table
size <n>, which is encoded as <n–1>. For example, a returned
value of 2047 indicates a table size of 2048. This field is read-
only. Legal range is 0–2047 (2 11 ).
Address offset: 0x068[26:16]
4-12 MSI and MSI-X Capabilities
UG-01145_avst
2014.08.18
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