It is not enough to check that uc supports GuC submission now
that we can continue to load the driver after GuC initialization
failure (support != enabled). Instead we should explicitly check
that we enabled GuC submission.
Signed-off-by: Fernando Pacheco <fernando.pach...@intel.com>
Cc: Michal Wajdeczko <michal.wajdec...@intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospu...@intel.com>
---
.../gpu/drm/i915/gt/uc/intel_guc_submission.c | 23 +++++++++++++++++++
.../gpu/drm/i915/gt/uc/intel_guc_submission.h | 1 +
drivers/gpu/drm/i915/gt/uc/intel_uc.c | 2 +-
3 files changed, 25 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
index f325d3dd564f..d4aff9a96c7a 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -191,6 +191,16 @@ static bool __doorbell_valid(struct intel_guc *guc, u16
db_id)
return intel_uncore_read(uncore, GEN8_DRBREGL(db_id)) & GEN8_DRB_VALID;
}
+static bool __doorbell_enabled(struct intel_guc_client *client)
+{
+ struct guc_doorbell_info *doorbell;
+
+ GEM_BUG_ON(!has_doorbell(client));
+
+ doorbell = __get_doorbell(client);
+ return doorbell->db_status == GUC_DOORBELL_ENABLED;
+}
+
static void __init_doorbell(struct intel_guc_client *client)
{
struct guc_doorbell_info *doorbell;
@@ -1112,6 +1122,19 @@ static void guc_set_default_submission(struct
intel_engine_cs *engine)
GEM_BUG_ON(engine->irq_enable || engine->irq_disable);
}
+bool intel_guc_is_submission_enabled(struct intel_guc *guc)
+{
+ if (!intel_guc_is_submission_supported(guc))
+ return false;
+
+ /*
+ * Use the fact that we enable the guc execbuf_client
+ * and its doorbell when enabling GuC submission as a proxy
+ * for the latter.
+ */
+ return guc->execbuf_client && __doorbell_enabled(guc->execbuf_client);
+}
+
int intel_guc_submission_enable(struct intel_guc *guc)
{
struct intel_gt *gt = guc_to_gt(guc);
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.h
b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.h
index 54d716828352..80b18a2c885a 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.h
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.h
@@ -58,6 +58,7 @@ struct intel_guc_client {
void intel_guc_submission_init_early(struct intel_guc *guc);
int intel_guc_submission_init(struct intel_guc *guc);
+bool intel_guc_is_submission_enabled(struct intel_guc *guc);
int intel_guc_submission_enable(struct intel_guc *guc);
void intel_guc_submission_disable(struct intel_guc *guc);
void intel_guc_submission_fini(struct intel_guc *guc);
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc.c
b/drivers/gpu/drm/i915/gt/uc/intel_uc.c
index 29a9eec60d2e..b2eb340ce87e 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_uc.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_uc.c
@@ -538,7 +538,7 @@ void intel_uc_fini_hw(struct intel_uc *uc)
if (!intel_guc_is_running(guc))
return;
- if (intel_uc_supports_guc_submission(uc))
+ if (intel_guc_is_submission_enabled(guc))
intel_guc_submission_disable(guc);
if (guc_communication_enabled(guc))
--
2.23.0
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