linux-kernel - [PATCH 12/21] drm/i915/guc: Introduce TLB_INVALIDATION

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Date:   Wed, 13 Jul 2022 10:30:09 +0100
From:   Mauro Carvalho Chehab <mchehab@...nel.org>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Piotr Piórkowski <piotr.piorkowski@...el.com>,
        Alan Previn <alan.previn.teres.alexis@...el.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Daniele Ceraolo Spurio <daniele.ceraolospurio@...el.com>,
        David Airlie <airlied@...ux.ie>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        John Harrison <John.C.Harrison@...el.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Lucas De Marchi <lucas.demarchi@...el.com>,
        Matt Roper <matthew.d.roper@...el.com>,
        Matthew Brost <matthew.brost@...el.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Michal Wajdeczko <michal.wajdeczko@...el.com>,
        Prathap Kumar Valsan <prathap.kumar.valsan@...el.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>,
        Umesh Nerlige Ramappa <umesh.nerlige.ramappa@...el.com>,
        Vinay Belgaumkar <vinay.belgaumkar@...el.com>,
        dri-devel@...ts.freedesktop.org, intel-gfx@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 12/21] drm/i915/guc: Introduce TLB_INVALIDATION_ALL action

From: Piotr Piórkowski <piotr.piorkowski@...el.com>

Add a new way to invalidate TLB via GuC using actions 0x7002
(TLB_INVALIDATION_ALL).

Those actions will be used on upcoming patches.

Signed-off-by: Piotr Piórkowski <piotr.piorkowski@...el.com>
Cc: Michal Wajdeczko <michal.wajdeczko@...el.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@...nel.org>
---

See [PATCH 00/21] at: https://lore.kernel.org/all/cover.1657703926.git.mchehab@kernel.org/

 drivers/gpu/drm/i915/gt/uc/abi/guc_actions_abi.h |  1 +
 drivers/gpu/drm/i915/gt/uc/intel_guc.c           | 14 ++++++++++++++
 drivers/gpu/drm/i915/gt/uc/intel_guc.h           |  1 +
 3 files changed, 16 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/uc/abi/guc_actions_abi.h b/drivers/gpu/drm/i915/gt/uc/abi/guc_actions_abi.h
index 14e35a2f8306..fb0af33e43cc 100644
--- a/drivers/gpu/drm/i915/gt/uc/abi/guc_actions_abi.h
+++ b/drivers/gpu/drm/i915/gt/uc/abi/guc_actions_abi.h
@@ -138,6 +138,7 @@ enum intel_guc_action {
 	INTEL_GUC_ACTION_PAGE_FAULT_NOTIFICATION = 0x6001,
 	INTEL_GUC_ACTION_TLB_INVALIDATION = 0x7000,
 	INTEL_GUC_ACTION_TLB_INVALIDATION_DONE = 0x7001,
+	INTEL_GUC_ACTION_TLB_INVALIDATION_ALL = 0x7002,
 	INTEL_GUC_ACTION_STATE_CAPTURE_NOTIFICATION = 0x8002,
 	INTEL_GUC_ACTION_NOTIFY_FLUSH_LOG_BUFFER_TO_FILE = 0x8003,
 	INTEL_GUC_ACTION_NOTIFY_CRASH_DUMP_POSTED = 0x8004,
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc.c
index 5c59f9b144a3..8a104a292598 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.c
@@ -945,6 +945,20 @@ int intel_guc_invalidate_tlb_guc(struct intel_guc *guc,
 	return guc_send_invalidate_tlb(guc, action, ARRAY_SIZE(action));
 }
 
+int intel_guc_invalidate_tlb_all(struct intel_guc *guc)
+{
+	u32 action[] = {
+		INTEL_GUC_ACTION_TLB_INVALIDATION_ALL,
+		0,
+		INTEL_GUC_TLB_INVAL_MODE_HEAVY << INTEL_GUC_TLB_INVAL_MODE_SHIFT |
+		INTEL_GUC_TLB_INVAL_FLUSH_CACHE,
+	};
+
+	GEM_BUG_ON(!INTEL_GUC_SUPPORTS_TLB_INVALIDATION(guc));
+
+	return guc_send_invalidate_tlb(guc, action, ARRAY_SIZE(action));
+}
+
 /**
  * intel_guc_load_status - dump information about GuC load status
  * @guc: the GuC
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc.h
index 73c46d405dc4..01c6478451cc 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc.h
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.h
@@ -386,6 +386,7 @@ int intel_guc_self_cfg64(struct intel_guc *guc, u16 key, u64 value);
 
 int intel_guc_invalidate_tlb_guc(struct intel_guc *guc,
 				 enum intel_guc_tlb_inval_mode mode);
+int intel_guc_invalidate_tlb_all(struct intel_guc *guc);
 
 static inline bool intel_guc_is_supported(struct intel_guc *guc)
 {
-- 
2.36.1