09de114c77
The NPC MCAM entries are currently divided into three priority zones in AF driver: high, mid, and low. The high priority zone and low priority zone take up 1/8th (each) of the available MCAM entries, and remaining going to the mid priority zone. The current allocation scheme may not meet certain requirements, such as when a requester needs more high priority zone entries than are reserved. This patch adds a devlink configurable option to increase the number of high priority zone entries that can be allocated by requester. The max number of entries that can be reserved for high priority usage is 100% of available MCAM entries. Usage: 1) Change high priority zone percentage to 75%: devlink -p dev param set pci/0002:01:00.0 name npc_mcam_high_zone_percent \ value 75 cmode runtime 2) Read high priority zone percentage: devlink -p dev param show pci/0002:01:00.0 name npc_mcam_high_zone_percent The devlink set configuration is only permitted when no MCAM entries are assigned, i.e., all MCAM entries are free, indicating that no PF/VF driver is loaded. So user must unload/unbind PF/VF driver/devices before modifying the high priority zone percentage. Signed-off-by: Naveen Mamindlapalli <naveenm@marvell.com> Signed-off-by: Sunil Goutham <sgoutham@marvell.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.