b9e0c47ee2
This allows the doorbell related logic to mask the doorbell index to the proper range before writing the doorbell. The current code masks the doorbell index immediately to keep it in the legal ranges for the most part. Subsequent patches will change the logic so that the index increments unbounded and it only gets masked before use. This is preparation work for the new chip that requires an additional Epoch bit in the doorbell that needs to toggle when the index has wrapped around. This patch just adds the basic infrastructure and the logic is largely unchanged. We now replace RING_CMP() with the new DB_RING_IDX() at appropriate places where we mask the completion ring index before writing the doorbell. Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com> Signed-off-by: Michael Chan <michael.chan@broadcom.com> Link: https://lore.kernel.org/r/20231120234405.194542-10-michael.chan@broadcom.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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.