diff mbox

[3/6] drm/i915/guc: Fix GuC interaction in reset/suspend scenarios

Message ID 1505109744-29688-3-git-send-email-sagar.a.kamble@intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

sagar.a.kamble@intel.com Sept. 11, 2017, 6:02 a.m. UTC 
From: "Kamble, Sagar A" <sagar.a.kamble@intel.com>

guc_ggtt_invalidate/guc_interrupts/guc_communication should be
disabled towards end of reset/suspend post GuC suspension as these
are setup back again during recovery/resume.

Prepared helpers intel_guc_pause and intel_guc_unpause that will do
teardown/bringup of this setup along with suspension/resumption of GuC if
loaded. These helpers can then be used along the system or runtime
suspend/resume paths as applicable. Currently post system resume, since
GuC is loaded completely system_resume function for GuC is doing
nothing. We rely on the setup happening in intel_uc_init_hw path.
During runtim_suspend we will call intel_guc_pause helper that will
suspend GuC operation by sending Host to GuC action ENTER_S_STATE and
then disable ggtt_invalidate, disable GuC communication, disable
GuC interrupts.
Another helper added is intel_guc_reset_prepare, this will make sure that
disabling of ggtt_invalidate, communication and GuC interrupts happens
prior to reset and updates the firmware load status to PENDING. This is
applicable in case of full GPU reset though.

v2: Updated commit message. Added note about skipped call to
intel_guc_system_resume. guc_enable/disable_communication was moved to
earlier patch so corresponding rebase. (Michal Wajdeczko)

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Michał Winiarski <michal.winiarski@intel.com>
Signed-off-by: Sagar Arun Kamble <sagar.a.kamble@intel.com>
---
 drivers/gpu/drm/i915/i915_drv.c            |  11 ++-
 drivers/gpu/drm/i915/i915_gem.c            |   4 +-
 drivers/gpu/drm/i915/i915_guc_submission.c |  50 -----------
 drivers/gpu/drm/i915/intel_guc.c           | 131 +++++++++++++++++++++++++++++
 drivers/gpu/drm/i915/intel_guc.h           |   7 +-
 5 files changed, 146 insertions(+), 57 deletions(-)
diff mbox

Patch

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index b825024..d70a160 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -1683,6 +1683,11 @@  static int i915_drm_resume(struct drm_device *dev)
 
 	drm_mode_config_reset(dev);
 
+	/*
+	 * NB: Full gem reinitialization is being done during i915_drm_resume,
+	 * hence intel_guc_system_resume will be of no use. If full
+	 * reinitialization is avoided, need to call intel_guc_system_resume.
+	 */
 	mutex_lock(&dev->struct_mutex);
 	if (i915_gem_init_hw(dev_priv)) {
 		DRM_ERROR("failed to re-initialize GPU, declaring wedged!\n");
@@ -1690,8 +1695,6 @@  static int i915_drm_resume(struct drm_device *dev)
 	}
 	mutex_unlock(&dev->struct_mutex);
 
-	intel_guc_resume(&dev_priv->guc);
-
 	intel_modeset_init_hw(dev);
 
 	spin_lock_irq(&dev_priv->irq_lock);
@@ -2492,7 +2495,7 @@  static int intel_runtime_suspend(struct device *kdev)
 	 */
 	i915_gem_runtime_suspend(dev_priv);
 
-	intel_guc_suspend(&dev_priv->guc);
+	intel_guc_runtime_suspend(&dev_priv->guc);
 
 	intel_runtime_pm_disable_interrupts(dev_priv);
 
@@ -2577,7 +2580,7 @@  static int intel_runtime_resume(struct device *kdev)
 	if (intel_uncore_unclaimed_mmio(dev_priv))
 		DRM_DEBUG_DRIVER("Unclaimed access during suspend, bios?\n");
 
-	intel_guc_resume(&dev_priv->guc);
+	intel_guc_runtime_resume(&dev_priv->guc);
 
 	if (IS_GEN9_LP(dev_priv)) {
 		bxt_disable_dc9(dev_priv);
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index eb20e73..306e42a 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2847,6 +2847,8 @@  int i915_gem_reset_prepare(struct drm_i915_private *dev_priv)
 
 	i915_gem_revoke_fences(dev_priv);
 
+	intel_guc_reset_prepare(&dev_priv->guc);
+
 	return err;
 }
 
@@ -4575,7 +4577,7 @@  int i915_gem_suspend(struct drm_i915_private *dev_priv)
 	i915_gem_contexts_lost(dev_priv);
 	mutex_unlock(&dev->struct_mutex);
 
-	intel_guc_suspend(&dev_priv->guc);
+	intel_guc_system_suspend(&dev_priv->guc);
 
 	cancel_delayed_work_sync(&dev_priv->gpu_error.hangcheck_work);
 	cancel_delayed_work_sync(&dev_priv->gt.retire_work);
diff --git a/drivers/gpu/drm/i915/i915_guc_submission.c b/drivers/gpu/drm/i915/i915_guc_submission.c
index 4b7afba..2f977ab 100644
--- a/drivers/gpu/drm/i915/i915_guc_submission.c
+++ b/drivers/gpu/drm/i915/i915_guc_submission.c
@@ -1287,53 +1287,3 @@  void i915_guc_submission_disable(struct drm_i915_private *dev_priv)
 	guc_client_free(guc->execbuf_client);
 	guc->execbuf_client = NULL;
 }
-
-/**
- * intel_guc_suspend() - notify GuC entering suspend state
- */
-int intel_guc_suspend(struct intel_guc *guc)
-{
-	struct drm_i915_private *dev_priv = guc_to_i915(guc);
-	struct i915_gem_context *ctx;
-	u32 data[3];
-
-	if (guc->fw.load_status != INTEL_UC_FIRMWARE_SUCCESS)
-		return 0;
-
-	gen9_disable_guc_interrupts(dev_priv);
-
-	ctx = dev_priv->kernel_context;
-
-	data[0] = INTEL_GUC_ACTION_ENTER_S_STATE;
-	/* any value greater than GUC_POWER_D0 */
-	data[1] = GUC_POWER_D1;
-	/* first page is shared data with GuC */
-	data[2] = guc_ggtt_offset(ctx->engine[RCS].state);
-
-	return intel_guc_send(guc, data, ARRAY_SIZE(data));
-}
-
-/**
- * intel_guc_resume() - notify GuC resuming from suspend state
- */
-int intel_guc_resume(struct intel_guc *guc)
-{
-	struct drm_i915_private *dev_priv = guc_to_i915(guc);
-	struct i915_gem_context *ctx;
-	u32 data[3];
-
-	if (guc->fw.load_status != INTEL_UC_FIRMWARE_SUCCESS)
-		return 0;
-
-	if (i915.guc_log_level >= 0)
-		gen9_enable_guc_interrupts(dev_priv);
-
-	ctx = dev_priv->kernel_context;
-
-	data[0] = INTEL_GUC_ACTION_EXIT_S_STATE;
-	data[1] = GUC_POWER_D0;
-	/* first page is shared data with GuC */
-	data[2] = guc_ggtt_offset(ctx->engine[RCS].state);
-
-	return intel_guc_send(guc, data, ARRAY_SIZE(data));
-}
diff --git a/drivers/gpu/drm/i915/intel_guc.c b/drivers/gpu/drm/i915/intel_guc.c
index 75bb830..b957dab 100644
--- a/drivers/gpu/drm/i915/intel_guc.c
+++ b/drivers/gpu/drm/i915/intel_guc.c
@@ -202,3 +202,134 @@  void intel_guc_disable_communication(struct intel_guc *guc)
 
 	guc->send = intel_guc_send_nop;
 }
+
+/**
+ * intel_guc_suspend() - notify GuC entering suspend state
+ */
+static int intel_guc_suspend(struct intel_guc *guc)
+{
+	struct drm_i915_private *dev_priv = guc_to_i915(guc);
+	struct i915_gem_context *ctx;
+	u32 data[3];
+
+	if (guc->fw.load_status != INTEL_UC_FIRMWARE_SUCCESS)
+		return 0;
+
+	ctx = dev_priv->kernel_context;
+
+	data[0] = INTEL_GUC_ACTION_ENTER_S_STATE;
+	/* any value greater than GUC_POWER_D0 */
+	data[1] = GUC_POWER_D1;
+	/* first page is shared data with GuC */
+	data[2] = guc_ggtt_offset(ctx->engine[RCS].state);
+
+	return intel_guc_send(guc, data, ARRAY_SIZE(data));
+}
+
+/**
+ * intel_guc_resume() - notify GuC resuming from suspend state
+ */
+static int intel_guc_resume(struct intel_guc *guc)
+{
+	struct drm_i915_private *dev_priv = guc_to_i915(guc);
+	struct i915_gem_context *ctx;
+	u32 data[3];
+
+	if (guc->fw.load_status != INTEL_UC_FIRMWARE_SUCCESS)
+		return 0;
+
+	ctx = dev_priv->kernel_context;
+
+	data[0] = INTEL_GUC_ACTION_EXIT_S_STATE;
+	data[1] = GUC_POWER_D0;
+	/* first page is shared data with GuC */
+	data[2] = guc_ggtt_offset(ctx->engine[RCS].state);
+
+	return intel_guc_send(guc, data, ARRAY_SIZE(data));
+}
+
+static void intel_guc_sanitize(struct intel_guc *guc)
+{
+	struct drm_i915_private *dev_priv = guc_to_i915(guc);
+
+	i915_ggtt_disable_guc(dev_priv);
+	intel_guc_disable_communication(guc);
+	gen9_disable_guc_interrupts(dev_priv);
+}
+
+void intel_guc_reset_prepare(struct intel_guc *guc)
+{
+	if (!i915.enable_guc_loading)
+		return;
+
+	intel_guc_sanitize(guc);
+	guc->fw.load_status = INTEL_UC_FIRMWARE_PENDING;
+}
+
+static int intel_guc_pause(struct intel_guc *guc)
+{
+	int ret = 0;
+
+	ret = intel_guc_suspend(guc);
+	intel_guc_sanitize(guc);
+
+	return ret;
+}
+
+static int intel_guc_unpause(struct intel_guc *guc)
+{
+	struct drm_i915_private *dev_priv = guc_to_i915(guc);
+	int ret = 0;
+
+	if (i915.guc_log_level >= 0)
+		gen9_enable_guc_interrupts(dev_priv);
+	intel_guc_enable_communication(guc);
+	i915_ggtt_enable_guc(dev_priv);
+	ret = intel_guc_resume(guc);
+
+	return ret;
+}
+
+int intel_guc_runtime_suspend(struct intel_guc *guc)
+{
+	if (!i915.enable_guc_loading)
+		return 0;
+
+	return intel_guc_pause(guc);
+}
+
+int intel_guc_runtime_resume(struct intel_guc *guc)
+{
+	if (!i915.enable_guc_loading)
+		return 0;
+
+	return intel_guc_unpause(guc);
+}
+
+int intel_guc_system_suspend(struct intel_guc *guc)
+{
+	int ret = 0;
+
+	if (!i915.enable_guc_loading)
+		return ret;
+
+	ret = intel_guc_pause(guc);
+	guc->fw.load_status = INTEL_UC_FIRMWARE_PENDING;
+
+	return ret;
+}
+
+int intel_guc_system_resume(struct intel_guc *guc)
+{
+	int ret = 0;
+
+	if (!i915.enable_guc_loading)
+		return ret;
+
+	/*
+	 * Placeholder for GuC resume from system suspend/freeze states.
+	 * Currently full reinitialization of GEM and GuC happens along
+	 * these paths, Hence this function is doing nothing.
+	 */
+	return ret;
+}
diff --git a/drivers/gpu/drm/i915/intel_guc.h b/drivers/gpu/drm/i915/intel_guc.h
index c6abf93..49bab33 100644
--- a/drivers/gpu/drm/i915/intel_guc.h
+++ b/drivers/gpu/drm/i915/intel_guc.h
@@ -159,6 +159,11 @@  static inline u32 guc_ggtt_offset(struct i915_vma *vma)
 void intel_guc_auth_huc(struct intel_guc *guc, struct intel_huc *huc);
 int intel_guc_enable_communication(struct intel_guc *guc);
 void intel_guc_disable_communication(struct intel_guc *guc);
+void intel_guc_reset_prepare(struct intel_guc *guc);
+int intel_guc_runtime_suspend(struct intel_guc *guc);
+int intel_guc_runtime_resume(struct intel_guc *guc);
+int intel_guc_system_suspend(struct intel_guc *guc);
+int intel_guc_system_resume(struct intel_guc *guc);
 
 static inline int intel_guc_send(struct intel_guc *guc, const u32 *action,
 				 u32 len)
@@ -184,8 +189,6 @@  static inline void intel_guc_notify(struct intel_guc *guc)
 void i915_guc_submission_disable(struct drm_i915_private *dev_priv);
 void i915_guc_submission_fini(struct drm_i915_private *dev_priv);
 struct i915_vma *intel_guc_allocate_vma(struct intel_guc *guc, u32 size);
-int intel_guc_suspend(struct intel_guc *guc);
-int intel_guc_resume(struct intel_guc *guc);
 
 /* intel_guc_log.c */
 int intel_guc_log_create(struct intel_guc *guc);