Re: [Intel-gfx] [PATCH 2/8] drm/i915/guc: Add an explicit 'submission_initialized' flag

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On 2/17/2022 3:52 PM, John.C.Harrison@xxxxxxxxx wrote:
From: John Harrison <John.C.Harrison@xxxxxxxxx>

The LRC descriptor pool is going away. So, stop using it as a check
for whether submission has been initialised or not.

Signed-off-by: John Harrison <John.C.Harrison@xxxxxxxxx>

grep confirmed those are the only places we use the pool that way, so:

Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@xxxxxxxxx>

Daniele

---
  drivers/gpu/drm/i915/gt/uc/intel_guc.h            | 2 ++
  drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c | 8 +++++---
  2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc.h
index 9d779de16613..568eb6352ef0 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc.h
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.h
@@ -137,6 +137,8 @@ struct intel_guc {
  	bool submission_supported;
  	/** @submission_selected: tracks whether the user enabled GuC submission */
  	bool submission_selected;
+	/** @submission_initialized: tracks whether GuC submission has been initialised */
+	bool submission_initialized;
  	/**
  	 * @rc_supported: tracks whether we support GuC rc on the current platform
  	 */
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 7fb889e14995..11bf56b5a266 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -511,7 +511,7 @@ static void guc_lrc_desc_pool_destroy(struct intel_guc *guc)
static inline bool guc_submission_initialized(struct intel_guc *guc)
  {
-	return !!guc->lrc_desc_pool_vaddr;
+	return guc->submission_initialized;
  }
static inline void _reset_lrc_desc(struct intel_guc *guc, u32 id)
@@ -1813,7 +1813,7 @@ int intel_guc_submission_init(struct intel_guc *guc)
  	struct intel_gt *gt = guc_to_gt(guc);
  	int ret;
- if (guc->lrc_desc_pool)
+	if (guc->submission_initialized)
  		return 0;
ret = guc_lrc_desc_pool_create(guc);
@@ -1845,19 +1845,21 @@ int intel_guc_submission_init(struct intel_guc *guc)
  	INIT_DELAYED_WORK(&guc->timestamp.work, guc_timestamp_ping);
  	guc->timestamp.ping_delay = (POLL_TIME_CLKS / gt->clock_frequency + 1) * HZ;
  	guc->timestamp.shift = gpm_timestamp_shift(gt);
+	guc->submission_initialized = true;
return 0;
  }
void intel_guc_submission_fini(struct intel_guc *guc)
  {
-	if (!guc->lrc_desc_pool)
+	if (!guc->submission_initialized)
  		return;
guc_flush_destroyed_contexts(guc);
  	guc_lrc_desc_pool_destroy(guc);
  	i915_sched_engine_put(guc->sched_engine);
  	bitmap_free(guc->submission_state.guc_ids_bitmap);
+	guc->submission_initialized = false;
  }
static inline void queue_request(struct i915_sched_engine *sched_engine,




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