978777d0fb
Follow the established programming model for this driver and provide shims in the felix DSA driver which call the implementations from the ocelot switch lib. The ocelot switchdev driver wasn't integrated with dcbnl due to lack of hardware availability. The switch doesn't have any fancy QoS classification enabled by default. The provided getters will create a default-prio app table entry of 0, and no dscp entry. However, the getters have been made to actually retrieve the hardware configuration rather than static values, to be future proof in case DSA will need this information from more call paths. For default-prio, there is a single field per port, in ANA_PORT_QOS_CFG, called QOS_DEFAULT_VAL. DSCP classification is enabled per-port, again via ANA_PORT_QOS_CFG (field QOS_DSCP_ENA), and individual DSCP values are configured as trusted or not through register ANA_DSCP_CFG (replicated 64 times). An untrusted DSCP value falls back to other QoS classification methods. If trusted, the selected ANA_DSCP_CFG register also holds the QoS class in the QOS_DSCP_VAL field. The hardware also supports DSCP remapping (DSCP value X is translated to DSCP value Y before the QoS class is determined based on the app table entry for Y) and DSCP packet rewriting. The dcbnl framework, for being so flexible in other useless areas, doesn't appear to support this. So this functionality has been left out. Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.