Altera Stratix V Avalon-ST - Manual (Page 44)

Signal Direction Description
rx_st_mask
Input
The Application Layer asserts this signal to tell the Hard IP to
stop sending non-posted requests. This signal can be asserted at
any time. Up to 10 non-posted requests can be transferred to the
Application Layer after
rx_st_mask
is asserted.
Configuration Status Interface
The output signals listed below drive the settings of the various configuration register fields of the
Functions. These settings are often needed in designing Application Layer logic.
Table 4-4: Configuration Status Interface
Signal Direction Description
bus_num_f0[7:0]
Output
Direction
Bus number assigned to Physical Function 0 by the Root
Complex, as captured from CfgWr transactions.
When ARI is enabled, the Application Layer must use this bus
number for all TLP requests and completions. When ARI is not
enabled, the Application Layer must use this bus number for TLP
requests and completions from PF0 and its associated Virtual
Functions.
bus_num_f1[7:0]
Output Bus number assigned to Physical Function 1 by the Root
Complex, as captured from CfgWr transactions.
When ARI is enabled,
bus_num_f1
is not used. When ARI is not
enabled, the application layer must use this bus number for TLP
requests and completions from PF1 and its associated Virtual
Functions.
device_num_f0[4:0]
Output Device number assigned to Physical Function 0 by the Root
Complex, as captured from CfgWr transactions.
When ARI is enabled, the Requester ID only consists of bus
number and function number. Consequently,
device_num_f0
is
unused. When ARI is disabled, the Application Layer must use
device_num_f0
for all TLP requests and completions from PF0
and its associated VFs.
device_num_f1[4:0]
Output Device number assigned to Physical Function 1 by the Root
Complex, as captured from CfgWr transactions.
When ARI is enabled, the Requester ID only consists of bus
number and function number. Consequently,
device_num_f1
is
unused. When ARI is disabled, the Application Layer must use
device_num_f1
for all TLP requests and completions from PF0
and its associated VFs.
UG-01097_sriov
2014.12.15
Configuration Status Interface 4-9
Interfaces and Signal Descriptions Altera Corporation
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