With this patch we disable GuC submission in i915_drm_suspend. This will
destroy the client which will be setup back again. We also reuse the
complete sanitization done via intel_uc_runtime_suspend in this path.
Post drm resume this state is recreated by intel_uc_init_hw hence we need
not have similar reuse for intel_uc_resume.
This also fixes issue where intel_uc_fini_hw was being called after GPU
reset happening in i915_gem_suspend in i915_driver_unload.
v2: Rebase w.r.t removal of GuC code restructuring. Added struct_mutex
protection for i915_guc_submission_disable.
v3: Rebase w.r.t updated GuC suspend function name.
v4: Added lockdep assert in i915_guc_submission_enable/disable. Refined
intel_uc_suspend to remove unnecessary locals and simplify return.
(Michal Winiarski)
Cc: Michal Wajdeczko <michal.wajdeczko@xxxxxxxxx>
Cc: Michał Winiarski <michal.winiarski@xxxxxxxxx>
Reviewed-by: Michał Winiarski <michal.winiarski@xxxxxxxxx>
Signed-off-by: Sagar Arun Kamble <sagar.a.kamble@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_guc_submission.c | 12 ++++++++++++
drivers/gpu/drm/i915/intel_uc.c | 11 +++++++----
2 files changed, 19 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_guc_submission.c b/drivers/gpu/drm/i915/i915_guc_submission.c
index cd5ef8b..0638ac5 100644
--- a/drivers/gpu/drm/i915/i915_guc_submission.c
+++ b/drivers/gpu/drm/i915/i915_guc_submission.c
@@ -1148,6 +1148,12 @@ int i915_guc_submission_enable(struct drm_i915_private *dev_priv)
sizeof(struct guc_wq_item) *
I915_NUM_ENGINES > GUC_WQ_SIZE);
+ /*
+ * Assert that drm.struct_mutex is held.
+ * Needed for GuC client vma binding.
+ */
+ lockdep_assert_held(&dev_priv->drm.struct_mutex);
+
if (!client) {
client = guc_client_alloc(dev_priv,
INTEL_INFO(dev_priv)->ring_mask,
@@ -1197,6 +1203,12 @@ void i915_guc_submission_disable(struct drm_i915_private *dev_priv)
{
struct intel_guc *guc = &dev_priv->guc;
+ /*
+ * Assert that drm.struct_mutex is held.
+ * Needed for GuC client vma unbinding.
+ */
+ lockdep_assert_held(&dev_priv->drm.struct_mutex);
+
guc_interrupts_release(dev_priv);
/* Revert back to manual ELSP submission */
diff --git a/drivers/gpu/drm/i915/intel_uc.c b/drivers/gpu/drm/i915/intel_uc.c
index 66d2cff..0e971d7 100644
--- a/drivers/gpu/drm/i915/intel_uc.c
+++ b/drivers/gpu/drm/i915/intel_uc.c
@@ -446,9 +446,6 @@ void intel_uc_fini_hw(struct drm_i915_private *dev_priv)
if (!i915.enable_guc_loading)
return;
- if (i915.enable_guc_submission)
- i915_guc_submission_disable(dev_priv);
-
guc_disable_communication(&dev_priv->guc);
if (i915.enable_guc_submission) {
@@ -585,7 +582,13 @@ int intel_uc_runtime_resume(struct drm_i915_private *dev_priv)
int intel_uc_suspend(struct drm_i915_private *dev_priv)
{
- return intel_guc_suspend(dev_priv);
+ if (i915.enable_guc_submission) {
+ mutex_lock(&dev_priv->drm.struct_mutex);
+ i915_guc_submission_disable(dev_priv);
+ mutex_unlock(&dev_priv->drm.struct_mutex);
+ }
+
+ return intel_uc_runtime_suspend(dev_priv);
}
int intel_uc_resume(struct drm_i915_private *dev_priv)
--
1.9.1
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