[Intel-gfx] [PATCH] drm/i915: Add relocation exceptions for two other platforms

[Zbigniew Kempczyński]

We have established previously we stop using relocations starting
from gen12 platforms with Tigerlake as an exception. Unfortunately
we need extend transition period and support relocations for two
other igfx platforms - Rocketlake and Alderlake.

As Alderlake is coming in two variants - S and P and only S landed
upstream already we will need to extend the relocation enabling
condition one more time for P version in the future.

Signed-off-by: Zbigniew Kempczyński <zbigniew.kempczynski at intel.com>
Cc: Dave Airlie <airlied at redhat.com>
Cc: Daniel Vetter <daniel.vetter at intel.com>
Cc: Jason Ekstrand <jason at jlekstrand.net>
---
 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
index 297143511f99..6d621898698f 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
@@ -496,11 +496,14 @@ 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.
+	/*
+	 * Relocations are disallowed starting from gen12 with some exceptions
+	 * - TGL/RKL/ADL.
 	 */
 	if (entry->relocation_count &&
-	    INTEL_GEN(eb->i915) >= 12 && !IS_TIGERLAKE(eb->i915))
+	    INTEL_GEN(eb->i915) >= 12 && !(IS_TIGERLAKE(eb->i915) ||
+					   IS_ROCKETLAKE(eb->i915) ||
+					   IS_ALDERLAKE_S(eb->i915)))
 		return -EINVAL;
 
 	if (unlikely(entry->flags & eb->invalid_flags))
-- 
2.26.0