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1bba7323c7
For proper operation of i915 we need usable PCI GTTMMADDR BAR 0 (1 for GEN2). In most cases we also need usable PCI GFXMEM BAR 2. Let's add functions to check if BARs are set, and that it have a size greater than 0. In case GTTMMADDR BAR, let's validate at the beginning of i915 initialization. For other BARs, let's validate before first use. Signed-off-by: Piotr Piórkowski <piotr.piorkowski@intel.com> Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: Lucas De Marchi <lucas.demarchi@intel.com> Cc: Matt Roper <matthew.d.roper@intel.com> Reviewed-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220805155959.1983584-3-piotr.piorkowski@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.