linux-kernel - [PATCH v3 3/6] drm/i915/gt: Invalidate TLB of the OA unit at TLB invalidations

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Message-Id: <59724d9f5cf1e93b1620d01b8332ac991555283d.1658924372.git.mchehab@kernel.org>
Date:   Wed, 27 Jul 2022 14:29:53 +0200
From:   Mauro Carvalho Chehab <mchehab@...nel.org>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Chris Wilson <chris.p.wilson@...el.com>,
        Andi Shyti <andi.shyti@...ux.intel.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Daniele Ceraolo Spurio <daniele.ceraolospurio@...el.com>,
        Dave Airlie <airlied@...hat.com>,
        David Airlie <airlied@...ux.ie>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Lucas De Marchi <lucas.demarchi@...el.com>,
        Matt Roper <matthew.d.roper@...el.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>,
        dri-devel@...ts.freedesktop.org, intel-gfx@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Fei Yang <fei.yang@...el.com>,
        Tvrtko Ursulin <tvrtko.ursulin@...el.com>,
        Thomas Hellström 
        <thomas.hellstrom@...ux.intel.com>
Subject: [PATCH v3 3/6] drm/i915/gt: Invalidate TLB of the OA unit at TLB invalidations

From: Chris Wilson <chris.p.wilson@...el.com>

Ensure that the TLB of the OA unit is also invalidated
on gen12 HW, as just invalidating the TLB of an engine is not
enough.

Cc: stable@...r.kernel.org
Fixes: 7938d61591d3 ("drm/i915: Flush TLBs before releasing backing store")
Signed-off-by: Chris Wilson <chris.p.wilson@...el.com>
Cc: Fei Yang <fei.yang@...el.com>
Reviewed-by: Andi Shyti <andi.shyti@...ux.intel.com>
Acked-by: Tvrtko Ursulin <tvrtko.ursulin@...el.com>
Acked-by: Thomas Hellström <thomas.hellstrom@...ux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@...nel.org>
---

To avoid mailbombing on a large number of people, only mailing lists were C/C on the cover.
See [PATCH v3 0/6] at: https://lore.kernel.org/all/cover.1658924372.git.mchehab@kernel.org/

 drivers/gpu/drm/i915/gt/intel_gt.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c
index c4d43da84d8e..1d84418e8676 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt.c
+++ b/drivers/gpu/drm/i915/gt/intel_gt.c
@@ -11,6 +11,7 @@
 #include "pxp/intel_pxp.h"
 
 #include "i915_drv.h"
+#include "i915_perf_oa_regs.h"
 #include "intel_context.h"
 #include "intel_engine_pm.h"
 #include "intel_engine_regs.h"
@@ -969,6 +970,15 @@ void intel_gt_invalidate_tlbs(struct intel_gt *gt)
 		awake |= engine->mask;
 	}
 
+	/* Wa_2207587034:tgl,dg1,rkl,adl-s,adl-p */
+	if (awake &&
+	    (IS_TIGERLAKE(i915) ||
+	     IS_DG1(i915) ||
+	     IS_ROCKETLAKE(i915) ||
+	     IS_ALDERLAKE_S(i915) ||
+	     IS_ALDERLAKE_P(i915)))
+		intel_uncore_write_fw(uncore, GEN12_OA_TLB_INV_CR, 1);
+
 	spin_unlock_irq(&uncore->lock);
 
 	for_each_engine_masked(engine, gt, awake, tmp) {
-- 
2.36.1