82598EB Datasheet, PDF (526/596 Pages) Intel Corporation – Intel® 82598EB 10 Gigabit Ethernet Controller Datasheet

Intel^® 82598EB 10 GbE Controller - Basic NC-SI Workflows
2. Any other command targeted to a channel in the package also implicitly selects that NC package.
Package de-select can be accomplished only by issuing the De-Select Package command.
Note: The MC should always issue the Select Package command as the first command to the
package before issuing channel-specific commands.
For further details on package selection, refer to the NC-SI specification.
5.4.3.2 Channel States
A NC channel can be in one of the following states:
1. Initial State - In this state, the channel only accepts the Clear Initial State command (the package
also accepts the Select Package and De-Select Package commands).
2. Active state - This is the normal operational mode. All commands are accepted.
For normal operation mode, the MC should always send the Clear Initial State command as the first
command to the channel.
5.4.3.3 Discovery
After interface power-up, the MC should perform a discovery process to discover the NCs that are
connected to it.
This process should include an algorithm similar to the following:
1. For package_id=0x0 to MAX_PACKAGE_ID
a. Issue Select Package command to package ID package_id
b. If received a response then
For internal_channel_id = 0x0 to MAX_INTERNAL_CHANNEL_ID
Issue a Clear Initial State command for package_id | internal_channel_id (the combination of
package_id and internal_channel_id to create the channel ID).
If a response was received then
Consider internal_channel_id as a valid channel for the package_id package
The MC can now optionally discover channel capabilities and version ID for the channel
Else (If not a response was not received, then issue a Clear Initial State command three times.
Issue a De-Select Package command to the package (and continue to the next package).
c. Else (If a response was not received, issue a Select Packet command three times.
5.4.3.4 Configurations
This section details different configurations that should be performed by the MC.
It is considered a good practice that the MC does not consider any configuration valid unless the MC has
explicitly configured it after every reset (entry into the initial state).
As a result, it is recommended that the MC re-configure everything at power-up and channel/package
resets.
526