drm/i915: Add relocation exceptions for two other platforms

For topic/intel-for-CI branch only.

We have established previously we stop using relocations starting
from gen12 platforms with Tigerlake as an exception. We keep this
statement but we want to enable relocations conditionally for
Alderlake S+P under require_force_probe flag set.

Keeping relocations under require_force_probe flag is interim solution
until IGTs will be rewritten to use softpin.

v2: - remove inline from function definition (Jani)
    - fix indentation

v3: change to GRAPHICS_VER() (Zbigniew)

v4: remove RKL from flag as it is already shipped (Rodrigo)

v5: prepare patch to be used within topic/intel-for-CI branch only

v6: change comment (Rodrigo)

Signed-off-by: Zbigniew Kempczyński <[email protected]>
Cc: Dave Airlie <[email protected]>
Cc: Daniel Vetter <[email protected]>
Cc: Jason Ekstrand <[email protected]>
Cc: Rodrigo Vivi <[email protected]>
Acked-by: Dave Airlie <[email protected]>
Acked-by: Rodrigo Vivi <[email protected]>

Author: wegorz76

drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c

@@ -491,16 +491,27 @@ eb_unreserve_vma(struct eb_vma *ev)
 	ev->flags &= ~__EXEC_OBJECT_RESERVED;
 }
 
+static bool platform_has_relocs_enabled(const struct i915_execbuffer *eb)
+{
+	/*
+	 * Relocations are disallowed starting from gen12 with Tigerlake
+	 * as an exception. To unblock CI, we are temporarily allowing it
+	 * for Rocketlake and Alderlake.
+	 */
+	if (GRAPHICS_VER(eb->i915) < 12 || IS_TIGERLAKE(eb->i915) ||
+	    IS_ROCKETLAKE(eb->i915) || IS_ALDERLAKE_S(eb->i915) ||
+	    IS_ALDERLAKE_P(eb->i915))
+		return true;
+
+	return false;
+}
+
 static int
 eb_validate_vma(struct i915_execbuffer *eb,
 		struct drm_i915_gem_exec_object2 *entry,
 		struct i915_vma *vma)
 {
-	/* Relocations are disallowed for all platforms after TGL-LP.  This
-	 * also covers all platforms with local memory.
-	 */
-	if (entry->relocation_count &&
-	    GRAPHICS_VER(eb->i915) >= 12 && !IS_TIGERLAKE(eb->i915))
+	if (entry->relocation_count && !platform_has_relocs_enabled(eb))
 		return -EINVAL;
 
 	if (unlikely(entry->flags & eb->invalid_flags))