drm/xe/kunit: Set SR-IOV mode of the fake device

We want to add code that will check the driver's SR-IOV mode.

Update xe_pci_fake_device_init() and struct xe_pci_fake_data to
either explicitly specify desired SR-IOV mode of the fake device
or fallback to the default bare-metal mode.

Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://lore.kernel.org/r/20231218190629.502-5-michal.wajdeczko@intel.com
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>

drm/xe/kunit: Add stub to read_gmdid

Currently it's not possible to test the WAs for platforms using gmdid
since they don't have the IP information on the descriptor struct. In
order to allow that, add a stub function for read_gmdid() that is
activated when the test executes, replacing the iomap and read of the
real register.

Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://lore.kernel.org/r/20231129232807.1499826-5-lucas.demarchi@intel.com
Link: https://lore.kernel.org/r/20231205133954.2089546-3-lucas.demarchi@intel.com
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

drm/xe/kunit: Move fake pci data to test-priv

Instead of passing as parameter to xe_pci_fake_device_init(), use
test->priv to pass parameters down the call stack. The main advantage is
that then the data is readily available on other functions by using
kunit_get_current_test().

This is a preparation to fix the initialization of fake devices when
they were supposed to be using GMD_ID.

Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://lore.kernel.org/r/20231129232807.1499826-4-lucas.demarchi@intel.com
Link: https://lore.kernel.org/r/20231205133954.2089546-2-lucas.demarchi@intel.com
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

drm/xe: Add KUnit test for xe_pci.c IP engine lists

Add a simple KUnit test to ensure that the hardware engine lists for
GMD_ID IP definitions are sensible (i.e., no graphics engines defined
for the media IP and vice versa).

Only the IP descriptors for GMD_ID platforms are checked for now.
Presumably the engine lists on older pre-GMD_ID platforms shouldn't be
changing. We can extend the KUnit testing in the future if we decide we
want to check those as well.

v2:
- Add missing 'const' in xe_call_for_each_media_ip to avoid compiler
warning.

Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://lore.kernel.org/r/20230406235621.1914492-9-matthew.d.roper@intel.com
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

drm/xe: Generalize fake device creation

Instead of requiring tests to initialize a fake device an keep it in
sync with xe_pci.c when it's platform-dependent, export a function from
xe_pci.c to be used and piggy back on the device info creation. For
simpler tests that don't need any specific platform and just need a fake
xe device to pass around, xe_pci_fake_device_init_any() can be used.

Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://lore.kernel.org/r/20230401085151.1786204-5-lucas.demarchi@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

drm/xe: Move test infra out of xe_pci.[ch]

Move code out of xe_pci.[ch] into tests/*.[ch], like is done in other
similar compilation units. Even if this is not part of "tests for
xe_pci.c", they are functions exported and required by other tests. It's
better not to clutter the module headers and sources with them.

Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://lore.kernel.org/r/20230401085151.1786204-3-lucas.demarchi@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>