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80cf8af17a
Now tiles have their own sysfs interfaces under the gt/
directory. Because RC6 is a property that can be configured on a
tile basis, then each tile should have its own interface
The new sysfs structure will have a similar layout for the 4 tile
case:
/sys/.../card0
├── gt
│ ├── gt0
│ │ ├── id
│ │ ├── rc6_enable
│ │ ├── rc6_residency_ms
. . .
. . .
. .
│ └── gtN
│ ├── id
│ ├── rc6_enable
│ ├── rc6_residency_ms
│ .
│ .
│
└── power/ -+
├── rc6_enable | Original interface
├── rc6_residency_ms +-> kept as existing ABI;
. | it multiplexes over
. | the GTs
-+
The existing interfaces have been kept in their original location
to preserve the existing ABI. They act on all the GTs: when
reading they provide the average value from all the GTs.
This patch is not really adding exposing new interfaces (new
ABI) other than adapting the existing one to more tiles. In any
case this new set of interfaces will be a basic tool for system
managers and administrators when using i915.
Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Sujaritha Sundaresan <sujaritha.sundaresan@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220318233938.149744-6-andi.shyti@linux.intel.com
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.