[PATCH 00/23] Clean up GuC CI failures, simplify locking, and kernel DOC

[PATCH 00/23] Clean up GuC CI failures, simplify locking, and kernel DOC

[Matthew Brost]

Daniel Vetter pointed out that locking in the GuC submission code was
overly complicated, let's clean this up a bit before introducing more
features in the GuC submission backend.

Also fix some CI failures, port fixes from our internal tree, and add a
few more selftests for coverage.

Lastly, add some kernel DOC explaining how the GuC submission backend
works.

v2: Fix logic error in 'Workaround reset G2H is received after schedule
done G2H', don't propagate errors to dependent fences in execlists
submissiom, resolve checkpatch issues, resend to correct lists
v3: Fix issue kicking tasklet, drop guc_active, fix ref counting in
xarray, add guc_id sub structure, drop inline fuctions, and various
other cleanup suggested by Daniel
v4: Address Daniele's feedback, rebase to tip, resend for CI
v5 [Daniele taking over while Matt is out]: drop patches 8 and 27 for
now (not critical, Matt will update and resend when he's back), address
review comments, improve kerneldoc. Also move all code related to busy
loop to patch 2 so we have a standalone fix.
v6: Drop allocate of error capture in nowait context, drop flushing of
work queue (will get respun individually).

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> #v5

Matthew Brost (23):
  drm/i915/guc: Fix blocked context accounting
  drm/i915/guc: Fix outstanding G2H accounting
  drm/i915/guc: Unwind context requests in reverse order
  drm/i915/guc: Don't drop ce->guc_active.lock when unwinding context
  drm/i915/guc: Process all G2H message at once in work queue
  drm/i915/guc: Workaround reset G2H is received after schedule done G2H
  Revert "drm/i915/gt: Propagate change in error status to children on
    unhold"
  drm/i915/guc: Kick tasklet after queuing a request
  drm/i915/guc: Don't enable scheduling on a banned context, guc_id
    invalid, not registered
  drm/i915/guc: Copy whole golden context, set engine state size of
    subset
  drm/i915/selftests: Add initial GuC selftest for scrubbing lost G2H
  drm/i915/guc: Take context ref when cancelling request
  drm/i915/guc: Don't touch guc_state.sched_state without a lock
  drm/i915/guc: Reset LRC descriptor if register returns -ENODEV
  drm/i915/guc: Release submit fence from an irq_work
  drm/i915/guc: Move guc_blocked fence to struct guc_state
  drm/i915/guc: Rework and simplify locking
  drm/i915/guc: Proper xarray usage for contexts_lookup
  drm/i915/guc: Drop pin count check trick between sched_disable and
    re-pin
  drm/i915/guc: Move GuC priority fields in context under guc_active
  drm/i915/guc: Move fields protected by guc->contexts_lock into sub
    structure
  drm/i915/guc: Drop guc_active move everything into guc_state
  drm/i915/guc: Add GuC kernel doc

 Documentation/gpu/i915.rst                    |   2 +
 drivers/gpu/drm/i915/gt/intel_context.c       |  19 +-
 drivers/gpu/drm/i915/gt/intel_context_types.h |  80 +-
 .../drm/i915/gt/intel_execlists_submission.c  |   4 -
 drivers/gpu/drm/i915/gt/selftest_hangcheck.c  |   6 +-
 drivers/gpu/drm/i915/gt/uc/intel_guc.h        |  75 +-
 drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c    |  26 +-
 drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c     |   6 +-
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 904 +++++++++++-------
 drivers/gpu/drm/i915/gt/uc/selftest_guc.c     | 127 +++
 drivers/gpu/drm/i915/i915_request.h           |  26 +-
 drivers/gpu/drm/i915/i915_trace.h             |  12 +-
 .../drm/i915/selftests/i915_live_selftests.h  |   1 +
 .../i915/selftests/intel_scheduler_helpers.c  |  12 +
 .../i915/selftests/intel_scheduler_helpers.h  |   2 +
 15 files changed, 872 insertions(+), 430 deletions(-)
 create mode 100644 drivers/gpu/drm/i915/gt/uc/selftest_guc.c

-- 
2.32.0

[Intel-gfx] [PATCH 00/23] Clean up GuC CI failures, simplify locking, and kernel DOC

[Matthew Brost]

Daniel Vetter pointed out that locking in the GuC submission code was
overly complicated, let's clean this up a bit before introducing more
features in the GuC submission backend.

Also fix some CI failures, port fixes from our internal tree, and add a
few more selftests for coverage.

Lastly, add some kernel DOC explaining how the GuC submission backend
works.

v2: Fix logic error in 'Workaround reset G2H is received after schedule
done G2H', don't propagate errors to dependent fences in execlists
submissiom, resolve checkpatch issues, resend to correct lists
v3: Fix issue kicking tasklet, drop guc_active, fix ref counting in
xarray, add guc_id sub structure, drop inline fuctions, and various
other cleanup suggested by Daniel
v4: Address Daniele's feedback, rebase to tip, resend for CI
v5 [Daniele taking over while Matt is out]: drop patches 8 and 27 for
now (not critical, Matt will update and resend when he's back), address
review comments, improve kerneldoc. Also move all code related to busy
loop to patch 2 so we have a standalone fix.
v6: Drop allocate of error capture in nowait context, drop flushing of
work queue (will get respun individually).

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> #v5

Matthew Brost (23):
  drm/i915/guc: Fix blocked context accounting
  drm/i915/guc: Fix outstanding G2H accounting
  drm/i915/guc: Unwind context requests in reverse order
  drm/i915/guc: Don't drop ce->guc_active.lock when unwinding context
  drm/i915/guc: Process all G2H message at once in work queue
  drm/i915/guc: Workaround reset G2H is received after schedule done G2H
  Revert "drm/i915/gt: Propagate change in error status to children on
    unhold"
  drm/i915/guc: Kick tasklet after queuing a request
  drm/i915/guc: Don't enable scheduling on a banned context, guc_id
    invalid, not registered
  drm/i915/guc: Copy whole golden context, set engine state size of
    subset
  drm/i915/selftests: Add initial GuC selftest for scrubbing lost G2H
  drm/i915/guc: Take context ref when cancelling request
  drm/i915/guc: Don't touch guc_state.sched_state without a lock
  drm/i915/guc: Reset LRC descriptor if register returns -ENODEV
  drm/i915/guc: Release submit fence from an irq_work
  drm/i915/guc: Move guc_blocked fence to struct guc_state
  drm/i915/guc: Rework and simplify locking
  drm/i915/guc: Proper xarray usage for contexts_lookup
  drm/i915/guc: Drop pin count check trick between sched_disable and
    re-pin
  drm/i915/guc: Move GuC priority fields in context under guc_active
  drm/i915/guc: Move fields protected by guc->contexts_lock into sub
    structure
  drm/i915/guc: Drop guc_active move everything into guc_state
  drm/i915/guc: Add GuC kernel doc

 Documentation/gpu/i915.rst                    |   2 +
 drivers/gpu/drm/i915/gt/intel_context.c       |  19 +-
 drivers/gpu/drm/i915/gt/intel_context_types.h |  80 +-
 .../drm/i915/gt/intel_execlists_submission.c  |   4 -
 drivers/gpu/drm/i915/gt/selftest_hangcheck.c  |   6 +-
 drivers/gpu/drm/i915/gt/uc/intel_guc.h        |  75 +-
 drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c    |  26 +-
 drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c     |   6 +-
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 904 +++++++++++-------
 drivers/gpu/drm/i915/gt/uc/selftest_guc.c     | 127 +++
 drivers/gpu/drm/i915/i915_request.h           |  26 +-
 drivers/gpu/drm/i915/i915_trace.h             |  12 +-
 .../drm/i915/selftests/i915_live_selftests.h  |   1 +
 .../i915/selftests/intel_scheduler_helpers.c  |  12 +
 .../i915/selftests/intel_scheduler_helpers.h  |   2 +
 15 files changed, 872 insertions(+), 430 deletions(-)
 create mode 100644 drivers/gpu/drm/i915/gt/uc/selftest_guc.c

-- 
2.32.0

[PATCH 01/23] drm/i915/guc: Fix blocked context accounting

[Matthew Brost]

Prior to this patch the blocked context counter was cleared on
init_sched_state (used during registering a context & resets) which is
incorrect. This state needs to be persistent or the counter can read the
incorrect value resulting in scheduling never getting enabled again.

Fixes: 62eaf0ae217d ("drm/i915/guc: Support request cancellation")
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: <stable@vger.kernel.org>
---
 drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c | 2 +-
 1 file changed, 1 insertion(+), 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 87d8dc8f51b9..69faa39da178 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -152,7 +152,7 @@ static inline void init_sched_state(struct intel_context *ce)
 {
 	/* Only should be called from guc_lrc_desc_pin() */
 	atomic_set(&ce->guc_sched_state_no_lock, 0);
-	ce->guc_state.sched_state = 0;
+	ce->guc_state.sched_state &= SCHED_STATE_BLOCKED_MASK;
 }
 
 static inline bool
-- 
2.32.0

[Intel-gfx] [PATCH 01/23] drm/i915/guc: Fix blocked context accounting

[Matthew Brost]

Prior to this patch the blocked context counter was cleared on
init_sched_state (used during registering a context & resets) which is
incorrect. This state needs to be persistent or the counter can read the
incorrect value resulting in scheduling never getting enabled again.

Fixes: 62eaf0ae217d ("drm/i915/guc: Support request cancellation")
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: <stable@vger.kernel.org>
---
 drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c | 2 +-
 1 file changed, 1 insertion(+), 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 87d8dc8f51b9..69faa39da178 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -152,7 +152,7 @@ static inline void init_sched_state(struct intel_context *ce)
 {
 	/* Only should be called from guc_lrc_desc_pin() */
 	atomic_set(&ce->guc_sched_state_no_lock, 0);
-	ce->guc_state.sched_state = 0;
+	ce->guc_state.sched_state &= SCHED_STATE_BLOCKED_MASK;
 }
 
 static inline bool
-- 
2.32.0

[PATCH 02/23] drm/i915/guc: Fix outstanding G2H accounting

[Matthew Brost]

A small race that could result in incorrect accounting of the number
of outstanding G2H. Basically prior to this patch we did not increment
the number of outstanding G2H if we encoutered a GT reset while sending
a H2G. This was incorrect as the context state had already been updated
to anticipate a G2H response thus the counter should be incremented.

As part of this change we remove a legacy (now unused) path that was the
last caller requiring a G2H response that was not guaranteed to loop.
This allows us to simplify the accounting as we don't need to handle the
case where the send fails due to the channel being busy.

Also always use helper when decrementing this value.

v2 (Daniele): update GEM_BUG_ON check, pull in dead code removal from
later patch, remove loop param from context_deregister.

Fixes: f4eb1f3fe946 ("drm/i915/guc: Ensure G2H response has space in buffer")
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: <stable@vger.kernel.org>
Reviewed-by: John Harrison <John.C.Harrison@Intel.com>
---
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 79 +++++++++----------
 1 file changed, 37 insertions(+), 42 deletions(-)

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 69faa39da178..aff5dd247a88 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -352,20 +352,29 @@ static inline void set_lrc_desc_registered(struct intel_guc *guc, u32 id,
 	xa_unlock_irqrestore(&guc->context_lookup, flags);
 }
 
+static void decr_outstanding_submission_g2h(struct intel_guc *guc)
+{
+	if (atomic_dec_and_test(&guc->outstanding_submission_g2h))
+		wake_up_all(&guc->ct.wq);
+}
+
 static int guc_submission_send_busy_loop(struct intel_guc *guc,
 					 const u32 *action,
 					 u32 len,
 					 u32 g2h_len_dw,
 					 bool loop)
 {
-	int err;
-
-	err = intel_guc_send_busy_loop(guc, action, len, g2h_len_dw, loop);
+	/*
+	 * We always loop when a send requires a reply (i.e. g2h_len_dw > 0),
+	 * so we don't handle the case where we don't get a reply because we
+	 * aborted the send due to the channel being busy.
+	 */
+	GEM_BUG_ON(g2h_len_dw && !loop);
 
-	if (!err && g2h_len_dw)
+	if (g2h_len_dw)
 		atomic_inc(&guc->outstanding_submission_g2h);
 
-	return err;
+	return intel_guc_send_busy_loop(guc, action, len, g2h_len_dw, loop);
 }
 
 int intel_guc_wait_for_pending_msg(struct intel_guc *guc,
@@ -616,7 +625,7 @@ static void scrub_guc_desc_for_outstanding_g2h(struct intel_guc *guc)
 		init_sched_state(ce);
 
 		if (pending_enable || destroyed || deregister) {
-			atomic_dec(&guc->outstanding_submission_g2h);
+			decr_outstanding_submission_g2h(guc);
 			if (deregister)
 				guc_signal_context_fence(ce);
 			if (destroyed) {
@@ -635,7 +644,7 @@ static void scrub_guc_desc_for_outstanding_g2h(struct intel_guc *guc)
 				intel_engine_signal_breadcrumbs(ce->engine);
 			}
 			intel_context_sched_disable_unpin(ce);
-			atomic_dec(&guc->outstanding_submission_g2h);
+			decr_outstanding_submission_g2h(guc);
 			spin_lock_irqsave(&ce->guc_state.lock, flags);
 			guc_blocked_fence_complete(ce);
 			spin_unlock_irqrestore(&ce->guc_state.lock, flags);
@@ -1233,8 +1242,7 @@ static int register_context(struct intel_context *ce, bool loop)
 }
 
 static int __guc_action_deregister_context(struct intel_guc *guc,
-					   u32 guc_id,
-					   bool loop)
+					   u32 guc_id)
 {
 	u32 action[] = {
 		INTEL_GUC_ACTION_DEREGISTER_CONTEXT,
@@ -1243,16 +1251,16 @@ static int __guc_action_deregister_context(struct intel_guc *guc,
 
 	return guc_submission_send_busy_loop(guc, action, ARRAY_SIZE(action),
 					     G2H_LEN_DW_DEREGISTER_CONTEXT,
-					     loop);
+					     true);
 }
 
-static int deregister_context(struct intel_context *ce, u32 guc_id, bool loop)
+static int deregister_context(struct intel_context *ce, u32 guc_id)
 {
 	struct intel_guc *guc = ce_to_guc(ce);
 
 	trace_intel_context_deregister(ce);
 
-	return __guc_action_deregister_context(guc, guc_id, loop);
+	return __guc_action_deregister_context(guc, guc_id);
 }
 
 static intel_engine_mask_t adjust_engine_mask(u8 class, intel_engine_mask_t mask)
@@ -1340,26 +1348,23 @@ static int guc_lrc_desc_pin(struct intel_context *ce, bool loop)
 	 * registering this context.
 	 */
 	if (context_registered) {
+		bool disabled;
+		unsigned long flags;
+
 		trace_intel_context_steal_guc_id(ce);
-		if (!loop) {
+		GEM_BUG_ON(!loop);
+
+		/* Seal race with Reset */
+		spin_lock_irqsave(&ce->guc_state.lock, flags);
+		disabled = submission_disabled(guc);
+		if (likely(!disabled)) {
 			set_context_wait_for_deregister_to_register(ce);
 			intel_context_get(ce);
-		} else {
-			bool disabled;
-			unsigned long flags;
-
-			/* Seal race with Reset */
-			spin_lock_irqsave(&ce->guc_state.lock, flags);
-			disabled = submission_disabled(guc);
-			if (likely(!disabled)) {
-				set_context_wait_for_deregister_to_register(ce);
-				intel_context_get(ce);
-			}
-			spin_unlock_irqrestore(&ce->guc_state.lock, flags);
-			if (unlikely(disabled)) {
-				reset_lrc_desc(guc, desc_idx);
-				return 0;	/* Will get registered later */
-			}
+		}
+		spin_unlock_irqrestore(&ce->guc_state.lock, flags);
+		if (unlikely(disabled)) {
+			reset_lrc_desc(guc, desc_idx);
+			return 0;	/* Will get registered later */
 		}
 
 		/*
@@ -1367,13 +1372,9 @@ static int guc_lrc_desc_pin(struct intel_context *ce, bool loop)
 		 * context whose guc_id was stolen.
 		 */
 		with_intel_runtime_pm(runtime_pm, wakeref)
-			ret = deregister_context(ce, ce->guc_id, loop);
-		if (unlikely(ret == -EBUSY)) {
-			clr_context_wait_for_deregister_to_register(ce);
-			intel_context_put(ce);
-		} else if (unlikely(ret == -ENODEV)) {
+			ret = deregister_context(ce, ce->guc_id);
+		if (unlikely(ret == -ENODEV))
 			ret = 0;	/* Will get registered later */
-		}
 	} else {
 		with_intel_runtime_pm(runtime_pm, wakeref)
 			ret = register_context(ce, loop);
@@ -1730,7 +1731,7 @@ static inline void guc_lrc_desc_unpin(struct intel_context *ce)
 	GEM_BUG_ON(context_enabled(ce));
 
 	clr_context_registered(ce);
-	deregister_context(ce, ce->guc_id, true);
+	deregister_context(ce, ce->guc_id);
 }
 
 static void __guc_context_destroy(struct intel_context *ce)
@@ -2583,12 +2584,6 @@ g2h_context_lookup(struct intel_guc *guc, u32 desc_idx)
 	return ce;
 }
 
-static void decr_outstanding_submission_g2h(struct intel_guc *guc)
-{
-	if (atomic_dec_and_test(&guc->outstanding_submission_g2h))
-		wake_up_all(&guc->ct.wq);
-}
-
 int intel_guc_deregister_done_process_msg(struct intel_guc *guc,
 					  const u32 *msg,
 					  u32 len)
-- 
2.32.0

[Intel-gfx] [PATCH 02/23] drm/i915/guc: Fix outstanding G2H accounting

[Matthew Brost]

A small race that could result in incorrect accounting of the number
of outstanding G2H. Basically prior to this patch we did not increment
the number of outstanding G2H if we encoutered a GT reset while sending
a H2G. This was incorrect as the context state had already been updated
to anticipate a G2H response thus the counter should be incremented.

As part of this change we remove a legacy (now unused) path that was the
last caller requiring a G2H response that was not guaranteed to loop.
This allows us to simplify the accounting as we don't need to handle the
case where the send fails due to the channel being busy.

Also always use helper when decrementing this value.

v2 (Daniele): update GEM_BUG_ON check, pull in dead code removal from
later patch, remove loop param from context_deregister.

Fixes: f4eb1f3fe946 ("drm/i915/guc: Ensure G2H response has space in buffer")
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: <stable@vger.kernel.org>
Reviewed-by: John Harrison <John.C.Harrison@Intel.com>
---
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 79 +++++++++----------
 1 file changed, 37 insertions(+), 42 deletions(-)

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 69faa39da178..aff5dd247a88 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -352,20 +352,29 @@ static inline void set_lrc_desc_registered(struct intel_guc *guc, u32 id,
 	xa_unlock_irqrestore(&guc->context_lookup, flags);
 }
 
+static void decr_outstanding_submission_g2h(struct intel_guc *guc)
+{
+	if (atomic_dec_and_test(&guc->outstanding_submission_g2h))
+		wake_up_all(&guc->ct.wq);
+}
+
 static int guc_submission_send_busy_loop(struct intel_guc *guc,
 					 const u32 *action,
 					 u32 len,
 					 u32 g2h_len_dw,
 					 bool loop)
 {
-	int err;
-
-	err = intel_guc_send_busy_loop(guc, action, len, g2h_len_dw, loop);
+	/*
+	 * We always loop when a send requires a reply (i.e. g2h_len_dw > 0),
+	 * so we don't handle the case where we don't get a reply because we
+	 * aborted the send due to the channel being busy.
+	 */
+	GEM_BUG_ON(g2h_len_dw && !loop);
 
-	if (!err && g2h_len_dw)
+	if (g2h_len_dw)
 		atomic_inc(&guc->outstanding_submission_g2h);
 
-	return err;
+	return intel_guc_send_busy_loop(guc, action, len, g2h_len_dw, loop);
 }
 
 int intel_guc_wait_for_pending_msg(struct intel_guc *guc,
@@ -616,7 +625,7 @@ static void scrub_guc_desc_for_outstanding_g2h(struct intel_guc *guc)
 		init_sched_state(ce);
 
 		if (pending_enable || destroyed || deregister) {
-			atomic_dec(&guc->outstanding_submission_g2h);
+			decr_outstanding_submission_g2h(guc);
 			if (deregister)
 				guc_signal_context_fence(ce);
 			if (destroyed) {
@@ -635,7 +644,7 @@ static void scrub_guc_desc_for_outstanding_g2h(struct intel_guc *guc)
 				intel_engine_signal_breadcrumbs(ce->engine);
 			}
 			intel_context_sched_disable_unpin(ce);
-			atomic_dec(&guc->outstanding_submission_g2h);
+			decr_outstanding_submission_g2h(guc);
 			spin_lock_irqsave(&ce->guc_state.lock, flags);
 			guc_blocked_fence_complete(ce);
 			spin_unlock_irqrestore(&ce->guc_state.lock, flags);
@@ -1233,8 +1242,7 @@ static int register_context(struct intel_context *ce, bool loop)
 }
 
 static int __guc_action_deregister_context(struct intel_guc *guc,
-					   u32 guc_id,
-					   bool loop)
+					   u32 guc_id)
 {
 	u32 action[] = {
 		INTEL_GUC_ACTION_DEREGISTER_CONTEXT,
@@ -1243,16 +1251,16 @@ static int __guc_action_deregister_context(struct intel_guc *guc,
 
 	return guc_submission_send_busy_loop(guc, action, ARRAY_SIZE(action),
 					     G2H_LEN_DW_DEREGISTER_CONTEXT,
-					     loop);
+					     true);
 }
 
-static int deregister_context(struct intel_context *ce, u32 guc_id, bool loop)
+static int deregister_context(struct intel_context *ce, u32 guc_id)
 {
 	struct intel_guc *guc = ce_to_guc(ce);
 
 	trace_intel_context_deregister(ce);
 
-	return __guc_action_deregister_context(guc, guc_id, loop);
+	return __guc_action_deregister_context(guc, guc_id);
 }
 
 static intel_engine_mask_t adjust_engine_mask(u8 class, intel_engine_mask_t mask)
@@ -1340,26 +1348,23 @@ static int guc_lrc_desc_pin(struct intel_context *ce, bool loop)
 	 * registering this context.
 	 */
 	if (context_registered) {
+		bool disabled;
+		unsigned long flags;
+
 		trace_intel_context_steal_guc_id(ce);
-		if (!loop) {
+		GEM_BUG_ON(!loop);
+
+		/* Seal race with Reset */
+		spin_lock_irqsave(&ce->guc_state.lock, flags);
+		disabled = submission_disabled(guc);
+		if (likely(!disabled)) {
 			set_context_wait_for_deregister_to_register(ce);
 			intel_context_get(ce);
-		} else {
-			bool disabled;
-			unsigned long flags;
-
-			/* Seal race with Reset */
-			spin_lock_irqsave(&ce->guc_state.lock, flags);
-			disabled = submission_disabled(guc);
-			if (likely(!disabled)) {
-				set_context_wait_for_deregister_to_register(ce);
-				intel_context_get(ce);
-			}
-			spin_unlock_irqrestore(&ce->guc_state.lock, flags);
-			if (unlikely(disabled)) {
-				reset_lrc_desc(guc, desc_idx);
-				return 0;	/* Will get registered later */
-			}
+		}
+		spin_unlock_irqrestore(&ce->guc_state.lock, flags);
+		if (unlikely(disabled)) {
+			reset_lrc_desc(guc, desc_idx);
+			return 0;	/* Will get registered later */
 		}
 
 		/*
@@ -1367,13 +1372,9 @@ static int guc_lrc_desc_pin(struct intel_context *ce, bool loop)
 		 * context whose guc_id was stolen.
 		 */
 		with_intel_runtime_pm(runtime_pm, wakeref)
-			ret = deregister_context(ce, ce->guc_id, loop);
-		if (unlikely(ret == -EBUSY)) {
-			clr_context_wait_for_deregister_to_register(ce);
-			intel_context_put(ce);
-		} else if (unlikely(ret == -ENODEV)) {
+			ret = deregister_context(ce, ce->guc_id);
+		if (unlikely(ret == -ENODEV))
 			ret = 0;	/* Will get registered later */
-		}
 	} else {
 		with_intel_runtime_pm(runtime_pm, wakeref)
 			ret = register_context(ce, loop);
@@ -1730,7 +1731,7 @@ static inline void guc_lrc_desc_unpin(struct intel_context *ce)
 	GEM_BUG_ON(context_enabled(ce));
 
 	clr_context_registered(ce);
-	deregister_context(ce, ce->guc_id, true);
+	deregister_context(ce, ce->guc_id);
 }
 
 static void __guc_context_destroy(struct intel_context *ce)
@@ -2583,12 +2584,6 @@ g2h_context_lookup(struct intel_guc *guc, u32 desc_idx)
 	return ce;
 }
 
-static void decr_outstanding_submission_g2h(struct intel_guc *guc)
-{
-	if (atomic_dec_and_test(&guc->outstanding_submission_g2h))
-		wake_up_all(&guc->ct.wq);
-}
-
 int intel_guc_deregister_done_process_msg(struct intel_guc *guc,
 					  const u32 *msg,
 					  u32 len)
-- 
2.32.0

[Intel-gfx] [PATCH 03/23] drm/i915/guc: Unwind context requests in reverse order

[Matthew Brost]

When unwinding requests on a reset context, if other requests in the
context are in the priority list the requests could be resubmitted out
of seqno order. Traverse the list of active requests in reverse and
append to the head of the priority list to fix this.

Fixes: eb5e7da736f3 ("drm/i915/guc: Reset implementation for new GuC interface")
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: <stable@vger.kernel.org>
---
 drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

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 aff5dd247a88..0c1e6b465fba 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -806,9 +806,9 @@ __unwind_incomplete_requests(struct intel_context *ce)
 
 	spin_lock_irqsave(&sched_engine->lock, flags);
 	spin_lock(&ce->guc_active.lock);
-	list_for_each_entry_safe(rq, rn,
-				 &ce->guc_active.requests,
-				 sched.link) {
+	list_for_each_entry_safe_reverse(rq, rn,
+					 &ce->guc_active.requests,
+					 sched.link) {
 		if (i915_request_completed(rq))
 			continue;
 
@@ -825,7 +825,7 @@ __unwind_incomplete_requests(struct intel_context *ce)
 		}
 		GEM_BUG_ON(i915_sched_engine_is_empty(sched_engine));
 
-		list_add_tail(&rq->sched.link, pl);
+		list_add(&rq->sched.link, pl);
 		set_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags);
 
 		spin_lock(&ce->guc_active.lock);
-- 
2.32.0

[PATCH 03/23] drm/i915/guc: Unwind context requests in reverse order

[Matthew Brost]

When unwinding requests on a reset context, if other requests in the
context are in the priority list the requests could be resubmitted out
of seqno order. Traverse the list of active requests in reverse and
append to the head of the priority list to fix this.

Fixes: eb5e7da736f3 ("drm/i915/guc: Reset implementation for new GuC interface")
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: <stable@vger.kernel.org>
---
 drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

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 aff5dd247a88..0c1e6b465fba 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -806,9 +806,9 @@ __unwind_incomplete_requests(struct intel_context *ce)
 
 	spin_lock_irqsave(&sched_engine->lock, flags);
 	spin_lock(&ce->guc_active.lock);
-	list_for_each_entry_safe(rq, rn,
-				 &ce->guc_active.requests,
-				 sched.link) {
+	list_for_each_entry_safe_reverse(rq, rn,
+					 &ce->guc_active.requests,
+					 sched.link) {
 		if (i915_request_completed(rq))
 			continue;
 
@@ -825,7 +825,7 @@ __unwind_incomplete_requests(struct intel_context *ce)
 		}
 		GEM_BUG_ON(i915_sched_engine_is_empty(sched_engine));
 
-		list_add_tail(&rq->sched.link, pl);
+		list_add(&rq->sched.link, pl);
 		set_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags);
 
 		spin_lock(&ce->guc_active.lock);
-- 
2.32.0

[Intel-gfx] [PATCH 04/23] drm/i915/guc: Don't drop ce->guc_active.lock when unwinding context

[Matthew Brost]

Don't drop ce->guc_active.lock when unwinding a context after reset.
At one point we had to drop this because of a lock inversion but that is
no longer the case. It is much safer to hold the lock so let's do that.

Fixes: eb5e7da736f3 ("drm/i915/guc: Reset implementation for new GuC interface")
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Cc: <stable@vger.kernel.org>
---
 drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c | 4 ----
 1 file changed, 4 deletions(-)

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 0c1e6b465fba..31bbfe5479ae 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -813,8 +813,6 @@ __unwind_incomplete_requests(struct intel_context *ce)
 			continue;
 
 		list_del_init(&rq->sched.link);
-		spin_unlock(&ce->guc_active.lock);
-
 		__i915_request_unsubmit(rq);
 
 		/* Push the request back into the queue for later resubmission. */
@@ -827,8 +825,6 @@ __unwind_incomplete_requests(struct intel_context *ce)
 
 		list_add(&rq->sched.link, pl);
 		set_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags);
-
-		spin_lock(&ce->guc_active.lock);
 	}
 	spin_unlock(&ce->guc_active.lock);
 	spin_unlock_irqrestore(&sched_engine->lock, flags);
-- 
2.32.0

[PATCH 04/23] drm/i915/guc: Don't drop ce->guc_active.lock when unwinding context

[Matthew Brost]

Don't drop ce->guc_active.lock when unwinding a context after reset.
At one point we had to drop this because of a lock inversion but that is
no longer the case. It is much safer to hold the lock so let's do that.

Fixes: eb5e7da736f3 ("drm/i915/guc: Reset implementation for new GuC interface")
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Cc: <stable@vger.kernel.org>
---
 drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c | 4 ----
 1 file changed, 4 deletions(-)

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 0c1e6b465fba..31bbfe5479ae 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -813,8 +813,6 @@ __unwind_incomplete_requests(struct intel_context *ce)
 			continue;
 
 		list_del_init(&rq->sched.link);
-		spin_unlock(&ce->guc_active.lock);
-
 		__i915_request_unsubmit(rq);
 
 		/* Push the request back into the queue for later resubmission. */
@@ -827,8 +825,6 @@ __unwind_incomplete_requests(struct intel_context *ce)
 
 		list_add(&rq->sched.link, pl);
 		set_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags);
-
-		spin_lock(&ce->guc_active.lock);
 	}
 	spin_unlock(&ce->guc_active.lock);
 	spin_unlock_irqrestore(&sched_engine->lock, flags);
-- 
2.32.0

[PATCH 05/23] drm/i915/guc: Process all G2H message at once in work queue

[Matthew Brost]

Rather than processing 1 G2H at a time and re-queuing the work queue if
more messages exist, process all the G2H in a single pass of the work
queue.

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
---
 drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c
index 22b4733b55e2..20c710a74498 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c
@@ -1042,9 +1042,9 @@ static void ct_incoming_request_worker_func(struct work_struct *w)
 		container_of(w, struct intel_guc_ct, requests.worker);
 	bool done;
 
-	done = ct_process_incoming_requests(ct);
-	if (!done)
-		queue_work(system_unbound_wq, &ct->requests.worker);
+	do {
+		done = ct_process_incoming_requests(ct);
+	} while (!done);
 }
 
 static int ct_handle_event(struct intel_guc_ct *ct, struct ct_incoming_msg *request)
-- 
2.32.0

[Intel-gfx] [PATCH 05/23] drm/i915/guc: Process all G2H message at once in work queue

[Matthew Brost]

Rather than processing 1 G2H at a time and re-queuing the work queue if
more messages exist, process all the G2H in a single pass of the work
queue.

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
---
 drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c
index 22b4733b55e2..20c710a74498 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c
@@ -1042,9 +1042,9 @@ static void ct_incoming_request_worker_func(struct work_struct *w)
 		container_of(w, struct intel_guc_ct, requests.worker);
 	bool done;
 
-	done = ct_process_incoming_requests(ct);
-	if (!done)
-		queue_work(system_unbound_wq, &ct->requests.worker);
+	do {
+		done = ct_process_incoming_requests(ct);
+	} while (!done);
 }
 
 static int ct_handle_event(struct intel_guc_ct *ct, struct ct_incoming_msg *request)
-- 
2.32.0

[Intel-gfx] [PATCH 06/23] drm/i915/guc: Workaround reset G2H is received after schedule done G2H

[Matthew Brost]

If the context is reset as a result of the request cancellation the
context reset G2H is received after schedule disable done G2H which is
the wrong order. The schedule disable done G2H release the waiting
request cancellation code which resubmits the context. This races
with the context reset G2H which also wants to resubmit the context but
in this case it really should be a NOP as request cancellation code owns
the resubmit. Use some clever tricks of checking the context state to
seal this race until the GuC firmware is fixed.

v2:
 (Checkpatch)
  - Fix typos
v3:
 (Daniele)
  - State that is a bug in the GuC firmware

Fixes: 62eaf0ae217d ("drm/i915/guc: Support request cancellation")
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Cc: <stable@vger.kernel.org>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
---
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 41 ++++++++++++++++---
 1 file changed, 35 insertions(+), 6 deletions(-)

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 31bbfe5479ae..f9e3725b94c1 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -833,17 +833,33 @@ __unwind_incomplete_requests(struct intel_context *ce)
 static void __guc_reset_context(struct intel_context *ce, bool stalled)
 {
 	struct i915_request *rq;
+	unsigned long flags;
 	u32 head;
+	bool skip = false;
 
 	intel_context_get(ce);
 
 	/*
-	 * GuC will implicitly mark the context as non-schedulable
-	 * when it sends the reset notification. Make sure our state
-	 * reflects this change. The context will be marked enabled
-	 * on resubmission.
+	 * GuC will implicitly mark the context as non-schedulable when it sends
+	 * the reset notification. Make sure our state reflects this change. The
+	 * context will be marked enabled on resubmission.
+	 *
+	 * XXX: If the context is reset as a result of the request cancellation
+	 * this G2H is received after the schedule disable complete G2H which is
+	 * wrong as this creates a race between the request cancellation code
+	 * re-submitting the context and this G2H handler. This is a bug in the
+	 * GuC but can be worked around in the meantime but converting this to a
+	 * NOP if a pending enable is in flight as this indicates that a request
+	 * cancellation has occurred.
 	 */
-	clr_context_enabled(ce);
+	spin_lock_irqsave(&ce->guc_state.lock, flags);
+	if (likely(!context_pending_enable(ce)))
+		clr_context_enabled(ce);
+	else
+		skip = true;
+	spin_unlock_irqrestore(&ce->guc_state.lock, flags);
+	if (unlikely(skip))
+		goto out_put;
 
 	rq = intel_context_find_active_request(ce);
 	if (!rq) {
@@ -862,6 +878,7 @@ static void __guc_reset_context(struct intel_context *ce, bool stalled)
 out_replay:
 	guc_reset_state(ce, head, stalled);
 	__unwind_incomplete_requests(ce);
+out_put:
 	intel_context_put(ce);
 }
 
@@ -1598,6 +1615,13 @@ static void guc_context_cancel_request(struct intel_context *ce,
 			guc_reset_state(ce, intel_ring_wrap(ce->ring, rq->head),
 					true);
 		}
+
+		/*
+		 * XXX: Racey if context is reset, see comment in
+		 * __guc_reset_context().
+		 */
+		flush_work(&ce_to_guc(ce)->ct.requests.worker);
+
 		guc_context_unblock(ce);
 	}
 }
@@ -2712,7 +2736,12 @@ static void guc_handle_context_reset(struct intel_guc *guc,
 {
 	trace_intel_context_reset(ce);
 
-	if (likely(!intel_context_is_banned(ce))) {
+	/*
+	 * XXX: Racey if request cancellation has occurred, see comment in
+	 * __guc_reset_context().
+	 */
+	if (likely(!intel_context_is_banned(ce) &&
+		   !context_blocked(ce))) {
 		capture_error_state(guc, ce);
 		guc_context_replay(ce);
 	}
-- 
2.32.0

[PATCH 06/23] drm/i915/guc: Workaround reset G2H is received after schedule done G2H

[Matthew Brost]

If the context is reset as a result of the request cancellation the
context reset G2H is received after schedule disable done G2H which is
the wrong order. The schedule disable done G2H release the waiting
request cancellation code which resubmits the context. This races
with the context reset G2H which also wants to resubmit the context but
in this case it really should be a NOP as request cancellation code owns
the resubmit. Use some clever tricks of checking the context state to
seal this race until the GuC firmware is fixed.

v2:
 (Checkpatch)
  - Fix typos
v3:
 (Daniele)
  - State that is a bug in the GuC firmware

Fixes: 62eaf0ae217d ("drm/i915/guc: Support request cancellation")
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Cc: <stable@vger.kernel.org>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
---
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 41 ++++++++++++++++---
 1 file changed, 35 insertions(+), 6 deletions(-)

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 31bbfe5479ae..f9e3725b94c1 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -833,17 +833,33 @@ __unwind_incomplete_requests(struct intel_context *ce)
 static void __guc_reset_context(struct intel_context *ce, bool stalled)
 {
 	struct i915_request *rq;
+	unsigned long flags;
 	u32 head;
+	bool skip = false;
 
 	intel_context_get(ce);
 
 	/*
-	 * GuC will implicitly mark the context as non-schedulable
-	 * when it sends the reset notification. Make sure our state
-	 * reflects this change. The context will be marked enabled
-	 * on resubmission.
+	 * GuC will implicitly mark the context as non-schedulable when it sends
+	 * the reset notification. Make sure our state reflects this change. The
+	 * context will be marked enabled on resubmission.
+	 *
+	 * XXX: If the context is reset as a result of the request cancellation
+	 * this G2H is received after the schedule disable complete G2H which is
+	 * wrong as this creates a race between the request cancellation code
+	 * re-submitting the context and this G2H handler. This is a bug in the
+	 * GuC but can be worked around in the meantime but converting this to a
+	 * NOP if a pending enable is in flight as this indicates that a request
+	 * cancellation has occurred.
 	 */
-	clr_context_enabled(ce);
+	spin_lock_irqsave(&ce->guc_state.lock, flags);
+	if (likely(!context_pending_enable(ce)))
+		clr_context_enabled(ce);
+	else
+		skip = true;
+	spin_unlock_irqrestore(&ce->guc_state.lock, flags);
+	if (unlikely(skip))
+		goto out_put;
 
 	rq = intel_context_find_active_request(ce);
 	if (!rq) {
@@ -862,6 +878,7 @@ static void __guc_reset_context(struct intel_context *ce, bool stalled)
 out_replay:
 	guc_reset_state(ce, head, stalled);
 	__unwind_incomplete_requests(ce);
+out_put:
 	intel_context_put(ce);
 }
 
@@ -1598,6 +1615,13 @@ static void guc_context_cancel_request(struct intel_context *ce,
 			guc_reset_state(ce, intel_ring_wrap(ce->ring, rq->head),
 					true);
 		}
+
+		/*
+		 * XXX: Racey if context is reset, see comment in
+		 * __guc_reset_context().
+		 */
+		flush_work(&ce_to_guc(ce)->ct.requests.worker);
+
 		guc_context_unblock(ce);
 	}
 }
@@ -2712,7 +2736,12 @@ static void guc_handle_context_reset(struct intel_guc *guc,
 {
 	trace_intel_context_reset(ce);
 
-	if (likely(!intel_context_is_banned(ce))) {
+	/*
+	 * XXX: Racey if request cancellation has occurred, see comment in
+	 * __guc_reset_context().
+	 */
+	if (likely(!intel_context_is_banned(ce) &&
+		   !context_blocked(ce))) {
 		capture_error_state(guc, ce);
 		guc_context_replay(ce);
 	}
-- 
2.32.0

[PATCH 07/23] Revert "drm/i915/gt: Propagate change in error status to children on unhold"

[Matthew Brost]

Propagating errors to dependent fences is broken and can lead to errors
from one client ending up in another. In commit 3761baae908a ("Revert
"drm/i915: Propagate errors on awaiting already signaled fences""), we
attempted to get rid of fence error propagation but missed the case
added in commit 8e9f84cf5cac ("drm/i915/gt: Propagate change in error
status to children on unhold"). Revert that one too. This error was
found by an up-and-coming selftest which triggers a reset during
request cancellation and verifies that subsequent requests complete
successfully.

v2:
 (Daniel Vetter)
  - Use revert
v3:
 (Jason)
  - Update commit message

v4 (Daniele):
 - fix checkpatch error in commit message.

References: '3761baae908a ("Revert "drm/i915: Propagate errors on awaiting already signaled fences"")'
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/gt/intel_execlists_submission.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
index aeb324b701ec..87c595e4efe2 100644
--- a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
+++ b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
@@ -2140,10 +2140,6 @@ static void __execlists_unhold(struct i915_request *rq)
 			if (p->flags & I915_DEPENDENCY_WEAK)
 				continue;
 
-			/* Propagate any change in error status */
-			if (rq->fence.error)
-				i915_request_set_error_once(w, rq->fence.error);
-
 			if (w->engine != rq->engine)
 				continue;
 
-- 
2.32.0

[Intel-gfx] [PATCH 07/23] Revert "drm/i915/gt: Propagate change in error status to children on unhold"

[Matthew Brost]

Propagating errors to dependent fences is broken and can lead to errors
from one client ending up in another. In commit 3761baae908a ("Revert
"drm/i915: Propagate errors on awaiting already signaled fences""), we
attempted to get rid of fence error propagation but missed the case
added in commit 8e9f84cf5cac ("drm/i915/gt: Propagate change in error
status to children on unhold"). Revert that one too. This error was
found by an up-and-coming selftest which triggers a reset during
request cancellation and verifies that subsequent requests complete
successfully.

v2:
 (Daniel Vetter)
  - Use revert
v3:
 (Jason)
  - Update commit message

v4 (Daniele):
 - fix checkpatch error in commit message.

References: '3761baae908a ("Revert "drm/i915: Propagate errors on awaiting already signaled fences"")'
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/gt/intel_execlists_submission.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
index aeb324b701ec..87c595e4efe2 100644
--- a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
+++ b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
@@ -2140,10 +2140,6 @@ static void __execlists_unhold(struct i915_request *rq)
 			if (p->flags & I915_DEPENDENCY_WEAK)
 				continue;
 
-			/* Propagate any change in error status */
-			if (rq->fence.error)
-				i915_request_set_error_once(w, rq->fence.error);
-
 			if (w->engine != rq->engine)
 				continue;
 
-- 
2.32.0

[PATCH 08/23] drm/i915/guc: Kick tasklet after queuing a request

[Matthew Brost]

Kick tasklet after queuing a request so it submitted in a timely manner.

Fixes: 3a4cdf1982f0 ("drm/i915/guc: Implement GuC context operations for new inteface")
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
---
 drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c | 1 +
 1 file changed, 1 insertion(+)

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 f9e3725b94c1..bd401a5be87c 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -1049,6 +1049,7 @@ static inline void queue_request(struct i915_sched_engine *sched_engine,
 	list_add_tail(&rq->sched.link,
 		      i915_sched_lookup_priolist(sched_engine, prio));
 	set_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags);
+	tasklet_hi_schedule(&sched_engine->tasklet);
 }
 
 static int guc_bypass_tasklet_submit(struct intel_guc *guc,
-- 
2.32.0

[Intel-gfx] [PATCH 08/23] drm/i915/guc: Kick tasklet after queuing a request

[Matthew Brost]

Kick tasklet after queuing a request so it submitted in a timely manner.

Fixes: 3a4cdf1982f0 ("drm/i915/guc: Implement GuC context operations for new inteface")
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
---
 drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c | 1 +
 1 file changed, 1 insertion(+)

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 f9e3725b94c1..bd401a5be87c 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -1049,6 +1049,7 @@ static inline void queue_request(struct i915_sched_engine *sched_engine,
 	list_add_tail(&rq->sched.link,
 		      i915_sched_lookup_priolist(sched_engine, prio));
 	set_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags);
+	tasklet_hi_schedule(&sched_engine->tasklet);
 }
 
 static int guc_bypass_tasklet_submit(struct intel_guc *guc,
-- 
2.32.0

[PATCH 09/23] drm/i915/guc: Don't enable scheduling on a banned context, guc_id invalid, not registered

[Matthew Brost]

When unblocking a context, do not enable scheduling if the context is
banned, guc_id invalid, or not registered.

v2:
 (Daniele)
  - Add helper for unblock

Fixes: 62eaf0ae217d ("drm/i915/guc: Support request cancellation")
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: <stable@vger.kernel.org>
---
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 22 ++++++++++++++++---
 1 file changed, 19 insertions(+), 3 deletions(-)

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 bd401a5be87c..f5bee833ee7d 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -148,6 +148,7 @@ static inline void clr_context_registered(struct intel_context *ce)
 #define SCHED_STATE_BLOCKED_SHIFT			4
 #define SCHED_STATE_BLOCKED		BIT(SCHED_STATE_BLOCKED_SHIFT)
 #define SCHED_STATE_BLOCKED_MASK	(0xfff << SCHED_STATE_BLOCKED_SHIFT)
+
 static inline void init_sched_state(struct intel_context *ce)
 {
 	/* Only should be called from guc_lrc_desc_pin() */
@@ -1563,6 +1564,23 @@ static struct i915_sw_fence *guc_context_block(struct intel_context *ce)
 	return &ce->guc_blocked;
 }
 
+#define SCHED_STATE_MULTI_BLOCKED_MASK \
+	(SCHED_STATE_BLOCKED_MASK & ~SCHED_STATE_BLOCKED)
+#define SCHED_STATE_NO_UNBLOCK \
+	(SCHED_STATE_MULTI_BLOCKED_MASK | \
+	 SCHED_STATE_PENDING_DISABLE | \
+	 SCHED_STATE_BANNED)
+
+static bool context_cant_unblock(struct intel_context *ce)
+{
+	lockdep_assert_held(&ce->guc_state.lock);
+
+	return (ce->guc_state.sched_state & SCHED_STATE_NO_UNBLOCK) ||
+		context_guc_id_invalid(ce) ||
+		!lrc_desc_registered(ce_to_guc(ce), ce->guc_id) ||
+		!intel_context_is_pinned(ce);
+}
+
 static void guc_context_unblock(struct intel_context *ce)
 {
 	struct intel_guc *guc = ce_to_guc(ce);
@@ -1577,9 +1595,7 @@ static void guc_context_unblock(struct intel_context *ce)
 	spin_lock_irqsave(&ce->guc_state.lock, flags);
 
 	if (unlikely(submission_disabled(guc) ||
-		     !intel_context_is_pinned(ce) ||
-		     context_pending_disable(ce) ||
-		     context_blocked(ce) > 1)) {
+		     context_cant_unblock(ce))) {
 		enable = false;
 	} else {
 		enable = true;
-- 
2.32.0

[Intel-gfx] [PATCH 09/23] drm/i915/guc: Don't enable scheduling on a banned context, guc_id invalid, not registered

[Matthew Brost]

When unblocking a context, do not enable scheduling if the context is
banned, guc_id invalid, or not registered.

v2:
 (Daniele)
  - Add helper for unblock

Fixes: 62eaf0ae217d ("drm/i915/guc: Support request cancellation")
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: <stable@vger.kernel.org>
---
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 22 ++++++++++++++++---
 1 file changed, 19 insertions(+), 3 deletions(-)

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 bd401a5be87c..f5bee833ee7d 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -148,6 +148,7 @@ static inline void clr_context_registered(struct intel_context *ce)
 #define SCHED_STATE_BLOCKED_SHIFT			4
 #define SCHED_STATE_BLOCKED		BIT(SCHED_STATE_BLOCKED_SHIFT)
 #define SCHED_STATE_BLOCKED_MASK	(0xfff << SCHED_STATE_BLOCKED_SHIFT)
+
 static inline void init_sched_state(struct intel_context *ce)
 {
 	/* Only should be called from guc_lrc_desc_pin() */
@@ -1563,6 +1564,23 @@ static struct i915_sw_fence *guc_context_block(struct intel_context *ce)
 	return &ce->guc_blocked;
 }
 
+#define SCHED_STATE_MULTI_BLOCKED_MASK \
+	(SCHED_STATE_BLOCKED_MASK & ~SCHED_STATE_BLOCKED)
+#define SCHED_STATE_NO_UNBLOCK \
+	(SCHED_STATE_MULTI_BLOCKED_MASK | \
+	 SCHED_STATE_PENDING_DISABLE | \
+	 SCHED_STATE_BANNED)
+
+static bool context_cant_unblock(struct intel_context *ce)
+{
+	lockdep_assert_held(&ce->guc_state.lock);
+
+	return (ce->guc_state.sched_state & SCHED_STATE_NO_UNBLOCK) ||
+		context_guc_id_invalid(ce) ||
+		!lrc_desc_registered(ce_to_guc(ce), ce->guc_id) ||
+		!intel_context_is_pinned(ce);
+}
+
 static void guc_context_unblock(struct intel_context *ce)
 {
 	struct intel_guc *guc = ce_to_guc(ce);
@@ -1577,9 +1595,7 @@ static void guc_context_unblock(struct intel_context *ce)
 	spin_lock_irqsave(&ce->guc_state.lock, flags);
 
 	if (unlikely(submission_disabled(guc) ||
-		     !intel_context_is_pinned(ce) ||
-		     context_pending_disable(ce) ||
-		     context_blocked(ce) > 1)) {
+		     context_cant_unblock(ce))) {
 		enable = false;
 	} else {
 		enable = true;
-- 
2.32.0

[PATCH 10/23] drm/i915/guc: Copy whole golden context, set engine state size of subset

[Matthew Brost]

When the GuC does a media reset, it copies a golden context state back
into the corrupted context's state. The address of the golden context
and the size of the engine state restore are passed in via the GuC ADS.
The i915 had a bug where it passed in the whole size of the golden
context, not the size of the engine state to restore resulting in a
memory corruption.

Also copy the entire golden context on init rather than just the engine
state that is restored.

v2 (Daniele): use defines to avoid duplicated const variables (John).

Fixes: 481d458caede ("drm/i915/guc: Add golden context to GuC ADS")
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: John Harrison <John.C.Harrison@Intel.com>
---
 drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c | 26 ++++++++++++++--------
 1 file changed, 17 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c
index 6926919bcac6..2c6ea64af7ec 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c
@@ -349,6 +349,8 @@ static void fill_engine_enable_masks(struct intel_gt *gt,
 	info->engine_enabled_masks[GUC_VIDEOENHANCE_CLASS] = VEBOX_MASK(gt);
 }
 
+#define LR_HW_CONTEXT_SIZE (80 * sizeof(u32))
+#define LRC_SKIP_SIZE (LRC_PPHWSP_SZ * PAGE_SIZE + LR_HW_CONTEXT_SIZE)
 static int guc_prep_golden_context(struct intel_guc *guc,
 				   struct __guc_ads_blob *blob)
 {
@@ -396,7 +398,18 @@ static int guc_prep_golden_context(struct intel_guc *guc,
 		if (!blob)
 			continue;
 
-		blob->ads.eng_state_size[guc_class] = real_size;
+		/*
+		 * This interface is slightly confusing. We need to pass the
+		 * base address of the full golden context and the size of just
+		 * the engine state, which is the section of the context image
+		 * that starts after the execlists context. This is required to
+		 * allow the GuC to restore just the engine state when a
+		 * watchdog reset occurs.
+		 * We calculate the engine state size by removing the size of
+		 * what comes before it in the context image (which is identical
+		 * on all engines).
+		 */
+		blob->ads.eng_state_size[guc_class] = real_size - LRC_SKIP_SIZE;
 		blob->ads.golden_context_lrca[guc_class] = addr_ggtt;
 		addr_ggtt += alloc_size;
 	}
@@ -436,11 +449,6 @@ static void guc_init_golden_context(struct intel_guc *guc)
 	u8 engine_class, guc_class;
 	u8 *ptr;
 
-	/* Skip execlist and PPGTT registers + HWSP */
-	const u32 lr_hw_context_size = 80 * sizeof(u32);
-	const u32 skip_size = LRC_PPHWSP_SZ * PAGE_SIZE +
-		lr_hw_context_size;
-
 	if (!intel_uc_uses_guc_submission(&gt->uc))
 		return;
 
@@ -476,12 +484,12 @@ static void guc_init_golden_context(struct intel_guc *guc)
 			continue;
 		}
 
-		GEM_BUG_ON(blob->ads.eng_state_size[guc_class] != real_size);
+		GEM_BUG_ON(blob->ads.eng_state_size[guc_class] !=
+			   real_size - LRC_SKIP_SIZE);
 		GEM_BUG_ON(blob->ads.golden_context_lrca[guc_class] != addr_ggtt);
 		addr_ggtt += alloc_size;
 
-		shmem_read(engine->default_state, skip_size, ptr + skip_size,
-			   real_size - skip_size);
+		shmem_read(engine->default_state, 0, ptr, real_size);
 		ptr += alloc_size;
 	}
 
-- 
2.32.0

[Intel-gfx] [PATCH 10/23] drm/i915/guc: Copy whole golden context, set engine state size of subset

[Matthew Brost]

When the GuC does a media reset, it copies a golden context state back
into the corrupted context's state. The address of the golden context
and the size of the engine state restore are passed in via the GuC ADS.
The i915 had a bug where it passed in the whole size of the golden
context, not the size of the engine state to restore resulting in a
memory corruption.

Also copy the entire golden context on init rather than just the engine
state that is restored.

v2 (Daniele): use defines to avoid duplicated const variables (John).

Fixes: 481d458caede ("drm/i915/guc: Add golden context to GuC ADS")
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: John Harrison <John.C.Harrison@Intel.com>
---
 drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c | 26 ++++++++++++++--------
 1 file changed, 17 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c
index 6926919bcac6..2c6ea64af7ec 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c
@@ -349,6 +349,8 @@ static void fill_engine_enable_masks(struct intel_gt *gt,
 	info->engine_enabled_masks[GUC_VIDEOENHANCE_CLASS] = VEBOX_MASK(gt);
 }
 
+#define LR_HW_CONTEXT_SIZE (80 * sizeof(u32))
+#define LRC_SKIP_SIZE (LRC_PPHWSP_SZ * PAGE_SIZE + LR_HW_CONTEXT_SIZE)
 static int guc_prep_golden_context(struct intel_guc *guc,
 				   struct __guc_ads_blob *blob)
 {
@@ -396,7 +398,18 @@ static int guc_prep_golden_context(struct intel_guc *guc,
 		if (!blob)
 			continue;
 
-		blob->ads.eng_state_size[guc_class] = real_size;
+		/*
+		 * This interface is slightly confusing. We need to pass the
+		 * base address of the full golden context and the size of just
+		 * the engine state, which is the section of the context image
+		 * that starts after the execlists context. This is required to
+		 * allow the GuC to restore just the engine state when a
+		 * watchdog reset occurs.
+		 * We calculate the engine state size by removing the size of
+		 * what comes before it in the context image (which is identical
+		 * on all engines).
+		 */
+		blob->ads.eng_state_size[guc_class] = real_size - LRC_SKIP_SIZE;
 		blob->ads.golden_context_lrca[guc_class] = addr_ggtt;
 		addr_ggtt += alloc_size;
 	}
@@ -436,11 +449,6 @@ static void guc_init_golden_context(struct intel_guc *guc)
 	u8 engine_class, guc_class;
 	u8 *ptr;
 
-	/* Skip execlist and PPGTT registers + HWSP */
-	const u32 lr_hw_context_size = 80 * sizeof(u32);
-	const u32 skip_size = LRC_PPHWSP_SZ * PAGE_SIZE +
-		lr_hw_context_size;
-
 	if (!intel_uc_uses_guc_submission(&gt->uc))
 		return;
 
@@ -476,12 +484,12 @@ static void guc_init_golden_context(struct intel_guc *guc)
 			continue;
 		}
 
-		GEM_BUG_ON(blob->ads.eng_state_size[guc_class] != real_size);
+		GEM_BUG_ON(blob->ads.eng_state_size[guc_class] !=
+			   real_size - LRC_SKIP_SIZE);
 		GEM_BUG_ON(blob->ads.golden_context_lrca[guc_class] != addr_ggtt);
 		addr_ggtt += alloc_size;
 
-		shmem_read(engine->default_state, skip_size, ptr + skip_size,
-			   real_size - skip_size);
+		shmem_read(engine->default_state, 0, ptr, real_size);
 		ptr += alloc_size;
 	}
 
-- 
2.32.0

[PATCH 11/23] drm/i915/selftests: Add initial GuC selftest for scrubbing lost G2H

[Matthew Brost]

While debugging an issue with full GT resets I went down a rabbit hole
thinking the scrubbing of lost G2H wasn't working correctly. This proved
to be incorrect as this was working just fine but this chase inspired me
to write a selftest to prove that this works. This simple selftest
injects errors dropping various G2H and then issues a full GT reset
proving that the scrubbing of these G2H doesn't blow up.

v2:
 (Daniel Vetter)
  - Use ifdef instead of macros for selftests
v3:
 (Checkpatch)
  - A space after 'switch' statement
v4:
 (Daniele)
  - A comment saying GT won't idle if G2H are lost

Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
---
 drivers/gpu/drm/i915/gt/intel_context_types.h |  18 +++
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c |  25 ++++
 drivers/gpu/drm/i915/gt/uc/selftest_guc.c     | 127 ++++++++++++++++++
 .../drm/i915/selftests/i915_live_selftests.h  |   1 +
 .../i915/selftests/intel_scheduler_helpers.c  |  12 ++
 .../i915/selftests/intel_scheduler_helpers.h  |   2 +
 6 files changed, 185 insertions(+)
 create mode 100644 drivers/gpu/drm/i915/gt/uc/selftest_guc.c

diff --git a/drivers/gpu/drm/i915/gt/intel_context_types.h b/drivers/gpu/drm/i915/gt/intel_context_types.h
index e54351a170e2..3a73f3117873 100644
--- a/drivers/gpu/drm/i915/gt/intel_context_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_context_types.h
@@ -198,6 +198,24 @@ struct intel_context {
 	 */
 	u8 guc_prio;
 	u32 guc_prio_count[GUC_CLIENT_PRIORITY_NUM];
+
+#ifdef CONFIG_DRM_I915_SELFTEST
+	/**
+	 * @drop_schedule_enable: Force drop of schedule enable G2H for selftest
+	 */
+	bool drop_schedule_enable;
+
+	/**
+	 * @drop_schedule_disable: Force drop of schedule disable G2H for
+	 * selftest
+	 */
+	bool drop_schedule_disable;
+
+	/**
+	 * @drop_deregister: Force drop of deregister G2H for selftest
+	 */
+	bool drop_deregister;
+#endif
 };
 
 #endif /* __INTEL_CONTEXT_TYPES__ */
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 f5bee833ee7d..5970c54a2e72 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -2639,6 +2639,13 @@ int intel_guc_deregister_done_process_msg(struct intel_guc *guc,
 
 	trace_intel_context_deregister_done(ce);
 
+#ifdef CONFIG_DRM_I915_SELFTEST
+	if (unlikely(ce->drop_deregister)) {
+		ce->drop_deregister = false;
+		return 0;
+	}
+#endif
+
 	if (context_wait_for_deregister_to_register(ce)) {
 		struct intel_runtime_pm *runtime_pm =
 			&ce->engine->gt->i915->runtime_pm;
@@ -2693,10 +2700,24 @@ int intel_guc_sched_done_process_msg(struct intel_guc *guc,
 	trace_intel_context_sched_done(ce);
 
 	if (context_pending_enable(ce)) {
+#ifdef CONFIG_DRM_I915_SELFTEST
+		if (unlikely(ce->drop_schedule_enable)) {
+			ce->drop_schedule_enable = false;
+			return 0;
+		}
+#endif
+
 		clr_context_pending_enable(ce);
 	} else if (context_pending_disable(ce)) {
 		bool banned;
 
+#ifdef CONFIG_DRM_I915_SELFTEST
+		if (unlikely(ce->drop_schedule_disable)) {
+			ce->drop_schedule_disable = false;
+			return 0;
+		}
+#endif
+
 		/*
 		 * Unpin must be done before __guc_signal_context_fence,
 		 * otherwise a race exists between the requests getting
@@ -3073,3 +3094,7 @@ bool intel_guc_virtual_engine_has_heartbeat(const struct intel_engine_cs *ve)
 
 	return false;
 }
+
+#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
+#include "selftest_guc.c"
+#endif
diff --git a/drivers/gpu/drm/i915/gt/uc/selftest_guc.c b/drivers/gpu/drm/i915/gt/uc/selftest_guc.c
new file mode 100644
index 000000000000..fb0e4a7bd8ca
--- /dev/null
+++ b/drivers/gpu/drm/i915/gt/uc/selftest_guc.c
@@ -0,0 +1,127 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright �� 2021 Intel Corporation
+ */
+
+#include "selftests/intel_scheduler_helpers.h"
+
+static struct i915_request *nop_user_request(struct intel_context *ce,
+					     struct i915_request *from)
+{
+	struct i915_request *rq;
+	int ret;
+
+	rq = intel_context_create_request(ce);
+	if (IS_ERR(rq))
+		return rq;
+
+	if (from) {
+		ret = i915_sw_fence_await_dma_fence(&rq->submit,
+						    &from->fence, 0,
+						    I915_FENCE_GFP);
+		if (ret < 0) {
+			i915_request_put(rq);
+			return ERR_PTR(ret);
+		}
+	}
+
+	i915_request_get(rq);
+	i915_request_add(rq);
+
+	return rq;
+}
+
+static int intel_guc_scrub_ctbs(void *arg)
+{
+	struct intel_gt *gt = arg;
+	int ret = 0;
+	int i;
+	struct i915_request *last[3] = {NULL, NULL, NULL}, *rq;
+	intel_wakeref_t wakeref;
+	struct intel_engine_cs *engine;
+	struct intel_context *ce;
+
+	wakeref = intel_runtime_pm_get(gt->uncore->rpm);
+	engine = intel_selftest_find_any_engine(gt);
+
+	/* Submit requests and inject errors forcing G2H to be dropped */
+	for (i = 0; i < 3; ++i) {
+		ce = intel_context_create(engine);
+		if (IS_ERR(ce)) {
+			ret = PTR_ERR(ce);
+			pr_err("Failed to create context, %d: %d\n", i, ret);
+			goto err;
+		}
+
+		switch (i) {
+		case 0:
+			ce->drop_schedule_enable = true;
+			break;
+		case 1:
+			ce->drop_schedule_disable = true;
+			break;
+		case 2:
+			ce->drop_deregister = true;
+			break;
+		}
+
+		rq = nop_user_request(ce, NULL);
+		intel_context_put(ce);
+
+		if (IS_ERR(rq)) {
+			ret = PTR_ERR(rq);
+			pr_err("Failed to create request, %d: %d\n", i, ret);
+			goto err;
+		}
+
+		last[i] = rq;
+	}
+
+	for (i = 0; i < 3; ++i) {
+		ret = i915_request_wait(last[i], 0, HZ);
+		if (ret < 0) {
+			pr_err("Last request failed to complete: %d\n", ret);
+			goto err;
+		}
+		i915_request_put(last[i]);
+		last[i] = NULL;
+	}
+
+	/* Force all H2G / G2H to be submitted / processed */
+	intel_gt_retire_requests(gt);
+	msleep(500);
+
+	/* Scrub missing G2H */
+	intel_gt_handle_error(engine->gt, -1, 0, "selftest reset");
+
+	/* GT will not idle if G2H are lost */
+	ret = intel_gt_wait_for_idle(gt, HZ);
+	if (ret < 0) {
+		pr_err("GT failed to idle: %d\n", ret);
+		goto err;
+	}
+
+err:
+	for (i = 0; i < 3; ++i)
+		if (last[i])
+			i915_request_put(last[i]);
+	intel_runtime_pm_put(gt->uncore->rpm, wakeref);
+
+	return ret;
+}
+
+int intel_guc_live_selftests(struct drm_i915_private *i915)
+{
+	static const struct i915_subtest tests[] = {
+		SUBTEST(intel_guc_scrub_ctbs),
+	};
+	struct intel_gt *gt = &i915->gt;
+
+	if (intel_gt_is_wedged(gt))
+		return 0;
+
+	if (!intel_uc_uses_guc_submission(&gt->uc))
+		return 0;
+
+	return intel_gt_live_subtests(tests, gt);
+}
diff --git a/drivers/gpu/drm/i915/selftests/i915_live_selftests.h b/drivers/gpu/drm/i915/selftests/i915_live_selftests.h
index cfa5c4165a4f..3cf6758931f9 100644
--- a/drivers/gpu/drm/i915/selftests/i915_live_selftests.h
+++ b/drivers/gpu/drm/i915/selftests/i915_live_selftests.h
@@ -47,5 +47,6 @@ selftest(execlists, intel_execlists_live_selftests)
 selftest(ring_submission, intel_ring_submission_live_selftests)
 selftest(perf, i915_perf_live_selftests)
 selftest(slpc, intel_slpc_live_selftests)
+selftest(guc, intel_guc_live_selftests)
 /* Here be dragons: keep last to run last! */
 selftest(late_gt_pm, intel_gt_pm_late_selftests)
diff --git a/drivers/gpu/drm/i915/selftests/intel_scheduler_helpers.c b/drivers/gpu/drm/i915/selftests/intel_scheduler_helpers.c
index 4b328346b48a..310fb83c527e 100644
--- a/drivers/gpu/drm/i915/selftests/intel_scheduler_helpers.c
+++ b/drivers/gpu/drm/i915/selftests/intel_scheduler_helpers.c
@@ -14,6 +14,18 @@
 #define REDUCED_PREEMPT		10
 #define WAIT_FOR_RESET_TIME	10000
 
+struct intel_engine_cs *intel_selftest_find_any_engine(struct intel_gt *gt)
+{
+	struct intel_engine_cs *engine;
+	enum intel_engine_id id;
+
+	for_each_engine(engine, gt, id)
+		return engine;
+
+	pr_err("No valid engine found!\n");
+	return NULL;
+}
+
 int intel_selftest_modify_policy(struct intel_engine_cs *engine,
 				 struct intel_selftest_saved_policy *saved,
 				 u32 modify_type)
diff --git a/drivers/gpu/drm/i915/selftests/intel_scheduler_helpers.h b/drivers/gpu/drm/i915/selftests/intel_scheduler_helpers.h
index 35c098601ac0..ae60bb507f45 100644
--- a/drivers/gpu/drm/i915/selftests/intel_scheduler_helpers.h
+++ b/drivers/gpu/drm/i915/selftests/intel_scheduler_helpers.h
@@ -10,6 +10,7 @@
 
 struct i915_request;
 struct intel_engine_cs;
+struct intel_gt;
 
 struct intel_selftest_saved_policy {
 	u32 flags;
@@ -23,6 +24,7 @@ enum selftest_scheduler_modify {
 	SELFTEST_SCHEDULER_MODIFY_FAST_RESET,
 };
 
+struct intel_engine_cs *intel_selftest_find_any_engine(struct intel_gt *gt);
 int intel_selftest_modify_policy(struct intel_engine_cs *engine,
 				 struct intel_selftest_saved_policy *saved,
 				 enum selftest_scheduler_modify modify_type);
-- 
2.32.0

[Intel-gfx] [PATCH 11/23] drm/i915/selftests: Add initial GuC selftest for scrubbing lost G2H

[Matthew Brost]

While debugging an issue with full GT resets I went down a rabbit hole
thinking the scrubbing of lost G2H wasn't working correctly. This proved
to be incorrect as this was working just fine but this chase inspired me
to write a selftest to prove that this works. This simple selftest
injects errors dropping various G2H and then issues a full GT reset
proving that the scrubbing of these G2H doesn't blow up.

v2:
 (Daniel Vetter)
  - Use ifdef instead of macros for selftests
v3:
 (Checkpatch)
  - A space after 'switch' statement
v4:
 (Daniele)
  - A comment saying GT won't idle if G2H are lost

Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
---
 drivers/gpu/drm/i915/gt/intel_context_types.h |  18 +++
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c |  25 ++++
 drivers/gpu/drm/i915/gt/uc/selftest_guc.c     | 127 ++++++++++++++++++
 .../drm/i915/selftests/i915_live_selftests.h  |   1 +
 .../i915/selftests/intel_scheduler_helpers.c  |  12 ++
 .../i915/selftests/intel_scheduler_helpers.h  |   2 +
 6 files changed, 185 insertions(+)
 create mode 100644 drivers/gpu/drm/i915/gt/uc/selftest_guc.c

diff --git a/drivers/gpu/drm/i915/gt/intel_context_types.h b/drivers/gpu/drm/i915/gt/intel_context_types.h
index e54351a170e2..3a73f3117873 100644
--- a/drivers/gpu/drm/i915/gt/intel_context_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_context_types.h
@@ -198,6 +198,24 @@ struct intel_context {
 	 */
 	u8 guc_prio;
 	u32 guc_prio_count[GUC_CLIENT_PRIORITY_NUM];
+
+#ifdef CONFIG_DRM_I915_SELFTEST
+	/**
+	 * @drop_schedule_enable: Force drop of schedule enable G2H for selftest
+	 */
+	bool drop_schedule_enable;
+
+	/**
+	 * @drop_schedule_disable: Force drop of schedule disable G2H for
+	 * selftest
+	 */
+	bool drop_schedule_disable;
+
+	/**
+	 * @drop_deregister: Force drop of deregister G2H for selftest
+	 */
+	bool drop_deregister;
+#endif
 };
 
 #endif /* __INTEL_CONTEXT_TYPES__ */
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 f5bee833ee7d..5970c54a2e72 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -2639,6 +2639,13 @@ int intel_guc_deregister_done_process_msg(struct intel_guc *guc,
 
 	trace_intel_context_deregister_done(ce);
 
+#ifdef CONFIG_DRM_I915_SELFTEST
+	if (unlikely(ce->drop_deregister)) {
+		ce->drop_deregister = false;
+		return 0;
+	}
+#endif
+
 	if (context_wait_for_deregister_to_register(ce)) {
 		struct intel_runtime_pm *runtime_pm =
 			&ce->engine->gt->i915->runtime_pm;
@@ -2693,10 +2700,24 @@ int intel_guc_sched_done_process_msg(struct intel_guc *guc,
 	trace_intel_context_sched_done(ce);
 
 	if (context_pending_enable(ce)) {
+#ifdef CONFIG_DRM_I915_SELFTEST
+		if (unlikely(ce->drop_schedule_enable)) {
+			ce->drop_schedule_enable = false;
+			return 0;
+		}
+#endif
+
 		clr_context_pending_enable(ce);
 	} else if (context_pending_disable(ce)) {
 		bool banned;
 
+#ifdef CONFIG_DRM_I915_SELFTEST
+		if (unlikely(ce->drop_schedule_disable)) {
+			ce->drop_schedule_disable = false;
+			return 0;
+		}
+#endif
+
 		/*
 		 * Unpin must be done before __guc_signal_context_fence,
 		 * otherwise a race exists between the requests getting
@@ -3073,3 +3094,7 @@ bool intel_guc_virtual_engine_has_heartbeat(const struct intel_engine_cs *ve)
 
 	return false;
 }
+
+#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
+#include "selftest_guc.c"
+#endif
diff --git a/drivers/gpu/drm/i915/gt/uc/selftest_guc.c b/drivers/gpu/drm/i915/gt/uc/selftest_guc.c
new file mode 100644
index 000000000000..fb0e4a7bd8ca
--- /dev/null
+++ b/drivers/gpu/drm/i915/gt/uc/selftest_guc.c
@@ -0,0 +1,127 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright �� 2021 Intel Corporation
+ */
+
+#include "selftests/intel_scheduler_helpers.h"
+
+static struct i915_request *nop_user_request(struct intel_context *ce,
+					     struct i915_request *from)
+{
+	struct i915_request *rq;
+	int ret;
+
+	rq = intel_context_create_request(ce);
+	if (IS_ERR(rq))
+		return rq;
+
+	if (from) {
+		ret = i915_sw_fence_await_dma_fence(&rq->submit,
+						    &from->fence, 0,
+						    I915_FENCE_GFP);
+		if (ret < 0) {
+			i915_request_put(rq);
+			return ERR_PTR(ret);
+		}
+	}
+
+	i915_request_get(rq);
+	i915_request_add(rq);
+
+	return rq;
+}
+
+static int intel_guc_scrub_ctbs(void *arg)
+{
+	struct intel_gt *gt = arg;
+	int ret = 0;
+	int i;
+	struct i915_request *last[3] = {NULL, NULL, NULL}, *rq;
+	intel_wakeref_t wakeref;
+	struct intel_engine_cs *engine;
+	struct intel_context *ce;
+
+	wakeref = intel_runtime_pm_get(gt->uncore->rpm);
+	engine = intel_selftest_find_any_engine(gt);
+
+	/* Submit requests and inject errors forcing G2H to be dropped */
+	for (i = 0; i < 3; ++i) {
+		ce = intel_context_create(engine);
+		if (IS_ERR(ce)) {
+			ret = PTR_ERR(ce);
+			pr_err("Failed to create context, %d: %d\n", i, ret);
+			goto err;
+		}
+
+		switch (i) {
+		case 0:
+			ce->drop_schedule_enable = true;
+			break;
+		case 1:
+			ce->drop_schedule_disable = true;
+			break;
+		case 2:
+			ce->drop_deregister = true;
+			break;
+		}
+
+		rq = nop_user_request(ce, NULL);
+		intel_context_put(ce);
+
+		if (IS_ERR(rq)) {
+			ret = PTR_ERR(rq);
+			pr_err("Failed to create request, %d: %d\n", i, ret);
+			goto err;
+		}
+
+		last[i] = rq;
+	}
+
+	for (i = 0; i < 3; ++i) {
+		ret = i915_request_wait(last[i], 0, HZ);
+		if (ret < 0) {
+			pr_err("Last request failed to complete: %d\n", ret);
+			goto err;
+		}
+		i915_request_put(last[i]);
+		last[i] = NULL;
+	}
+
+	/* Force all H2G / G2H to be submitted / processed */
+	intel_gt_retire_requests(gt);
+	msleep(500);
+
+	/* Scrub missing G2H */
+	intel_gt_handle_error(engine->gt, -1, 0, "selftest reset");
+
+	/* GT will not idle if G2H are lost */
+	ret = intel_gt_wait_for_idle(gt, HZ);
+	if (ret < 0) {
+		pr_err("GT failed to idle: %d\n", ret);
+		goto err;
+	}
+
+err:
+	for (i = 0; i < 3; ++i)
+		if (last[i])
+			i915_request_put(last[i]);
+	intel_runtime_pm_put(gt->uncore->rpm, wakeref);
+
+	return ret;
+}
+
+int intel_guc_live_selftests(struct drm_i915_private *i915)
+{
+	static const struct i915_subtest tests[] = {
+		SUBTEST(intel_guc_scrub_ctbs),
+	};
+	struct intel_gt *gt = &i915->gt;
+
+	if (intel_gt_is_wedged(gt))
+		return 0;
+
+	if (!intel_uc_uses_guc_submission(&gt->uc))
+		return 0;
+
+	return intel_gt_live_subtests(tests, gt);
+}
diff --git a/drivers/gpu/drm/i915/selftests/i915_live_selftests.h b/drivers/gpu/drm/i915/selftests/i915_live_selftests.h
index cfa5c4165a4f..3cf6758931f9 100644
--- a/drivers/gpu/drm/i915/selftests/i915_live_selftests.h
+++ b/drivers/gpu/drm/i915/selftests/i915_live_selftests.h
@@ -47,5 +47,6 @@ selftest(execlists, intel_execlists_live_selftests)
 selftest(ring_submission, intel_ring_submission_live_selftests)
 selftest(perf, i915_perf_live_selftests)
 selftest(slpc, intel_slpc_live_selftests)
+selftest(guc, intel_guc_live_selftests)
 /* Here be dragons: keep last to run last! */
 selftest(late_gt_pm, intel_gt_pm_late_selftests)
diff --git a/drivers/gpu/drm/i915/selftests/intel_scheduler_helpers.c b/drivers/gpu/drm/i915/selftests/intel_scheduler_helpers.c
index 4b328346b48a..310fb83c527e 100644
--- a/drivers/gpu/drm/i915/selftests/intel_scheduler_helpers.c
+++ b/drivers/gpu/drm/i915/selftests/intel_scheduler_helpers.c
@@ -14,6 +14,18 @@
 #define REDUCED_PREEMPT		10
 #define WAIT_FOR_RESET_TIME	10000
 
+struct intel_engine_cs *intel_selftest_find_any_engine(struct intel_gt *gt)
+{
+	struct intel_engine_cs *engine;
+	enum intel_engine_id id;
+
+	for_each_engine(engine, gt, id)
+		return engine;
+
+	pr_err("No valid engine found!\n");
+	return NULL;
+}
+
 int intel_selftest_modify_policy(struct intel_engine_cs *engine,
 				 struct intel_selftest_saved_policy *saved,
 				 u32 modify_type)
diff --git a/drivers/gpu/drm/i915/selftests/intel_scheduler_helpers.h b/drivers/gpu/drm/i915/selftests/intel_scheduler_helpers.h
index 35c098601ac0..ae60bb507f45 100644
--- a/drivers/gpu/drm/i915/selftests/intel_scheduler_helpers.h
+++ b/drivers/gpu/drm/i915/selftests/intel_scheduler_helpers.h
@@ -10,6 +10,7 @@
 
 struct i915_request;
 struct intel_engine_cs;
+struct intel_gt;
 
 struct intel_selftest_saved_policy {
 	u32 flags;
@@ -23,6 +24,7 @@ enum selftest_scheduler_modify {
 	SELFTEST_SCHEDULER_MODIFY_FAST_RESET,
 };
 
+struct intel_engine_cs *intel_selftest_find_any_engine(struct intel_gt *gt);
 int intel_selftest_modify_policy(struct intel_engine_cs *engine,
 				 struct intel_selftest_saved_policy *saved,
 				 enum selftest_scheduler_modify modify_type);
-- 
2.32.0

[PATCH 12/23] drm/i915/guc: Take context ref when cancelling request

[Matthew Brost]

A context can get destroyed after cancelling a request, if a context or
GT reset occurs, so take a reference to context when cancelling a
request.

Fixes: 62eaf0ae217d ("drm/i915/guc: Support request cancellation")
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
---
 drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c | 5 ++++-
 1 file changed, 4 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 5970c54a2e72..e036a171ff17 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -1624,8 +1624,10 @@ static void guc_context_cancel_request(struct intel_context *ce,
 				       struct i915_request *rq)
 {
 	if (i915_sw_fence_signaled(&rq->submit)) {
-		struct i915_sw_fence *fence = guc_context_block(ce);
+		struct i915_sw_fence *fence;
 
+		intel_context_get(ce);
+		fence = guc_context_block(ce);
 		i915_sw_fence_wait(fence);
 		if (!i915_request_completed(rq)) {
 			__i915_request_skip(rq);
@@ -1640,6 +1642,7 @@ static void guc_context_cancel_request(struct intel_context *ce,
 		flush_work(&ce_to_guc(ce)->ct.requests.worker);
 
 		guc_context_unblock(ce);
+		intel_context_put(ce);
 	}
 }
 
-- 
2.32.0

[Intel-gfx] [PATCH 12/23] drm/i915/guc: Take context ref when cancelling request

[Matthew Brost]

A context can get destroyed after cancelling a request, if a context or
GT reset occurs, so take a reference to context when cancelling a
request.

Fixes: 62eaf0ae217d ("drm/i915/guc: Support request cancellation")
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
---
 drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c | 5 ++++-
 1 file changed, 4 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 5970c54a2e72..e036a171ff17 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -1624,8 +1624,10 @@ static void guc_context_cancel_request(struct intel_context *ce,
 				       struct i915_request *rq)
 {
 	if (i915_sw_fence_signaled(&rq->submit)) {
-		struct i915_sw_fence *fence = guc_context_block(ce);
+		struct i915_sw_fence *fence;
 
+		intel_context_get(ce);
+		fence = guc_context_block(ce);
 		i915_sw_fence_wait(fence);
 		if (!i915_request_completed(rq)) {
 			__i915_request_skip(rq);
@@ -1640,6 +1642,7 @@ static void guc_context_cancel_request(struct intel_context *ce,
 		flush_work(&ce_to_guc(ce)->ct.requests.worker);
 
 		guc_context_unblock(ce);
+		intel_context_put(ce);
 	}
 }
 
-- 
2.32.0

[Intel-gfx] [PATCH 13/23] drm/i915/guc: Don't touch guc_state.sched_state without a lock

[Matthew Brost]

Before we did some clever tricks to not use the a lock when touching
guc_state.sched_state in certain cases. Don't do that, enforce the use
of the lock.

v2:
 (kernel test robo )
  - Add __maybe_unused to sched_state_is_init()

v3: rebase after the unused code path removal has been moved to an
earlier patch.

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reported-by: kernel test robot <lkp@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
---
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 22 ++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

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 e036a171ff17..ca73128d7b4d 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -151,11 +151,23 @@ static inline void clr_context_registered(struct intel_context *ce)
 
 static inline void init_sched_state(struct intel_context *ce)
 {
-	/* Only should be called from guc_lrc_desc_pin() */
+	lockdep_assert_held(&ce->guc_state.lock);
 	atomic_set(&ce->guc_sched_state_no_lock, 0);
 	ce->guc_state.sched_state &= SCHED_STATE_BLOCKED_MASK;
 }
 
+__maybe_unused
+static bool sched_state_is_init(struct intel_context *ce)
+{
+	/*
+	 * XXX: Kernel contexts can have SCHED_STATE_NO_LOCK_REGISTERED after
+	 * suspend.
+	 */
+	return !(atomic_read(&ce->guc_sched_state_no_lock) &
+		 ~SCHED_STATE_NO_LOCK_REGISTERED) &&
+		!(ce->guc_state.sched_state &= ~SCHED_STATE_BLOCKED_MASK);
+}
+
 static inline bool
 context_wait_for_deregister_to_register(struct intel_context *ce)
 {
@@ -166,7 +178,7 @@ context_wait_for_deregister_to_register(struct intel_context *ce)
 static inline void
 set_context_wait_for_deregister_to_register(struct intel_context *ce)
 {
-	/* Only should be called from guc_lrc_desc_pin() without lock */
+	lockdep_assert_held(&ce->guc_state.lock);
 	ce->guc_state.sched_state |=
 		SCHED_STATE_WAIT_FOR_DEREGISTER_TO_REGISTER;
 }
@@ -607,9 +619,7 @@ static void scrub_guc_desc_for_outstanding_g2h(struct intel_guc *guc)
 	bool pending_disable, pending_enable, deregister, destroyed, banned;
 
 	xa_for_each(&guc->context_lookup, index, ce) {
-		/* Flush context */
 		spin_lock_irqsave(&ce->guc_state.lock, flags);
-		spin_unlock_irqrestore(&ce->guc_state.lock, flags);
 
 		/*
 		 * Once we are at this point submission_disabled() is guaranteed
@@ -625,6 +635,8 @@ static void scrub_guc_desc_for_outstanding_g2h(struct intel_guc *guc)
 		banned = context_banned(ce);
 		init_sched_state(ce);
 
+		spin_unlock_irqrestore(&ce->guc_state.lock, flags);
+
 		if (pending_enable || destroyed || deregister) {
 			decr_outstanding_submission_g2h(guc);
 			if (deregister)
@@ -1324,6 +1336,7 @@ static int guc_lrc_desc_pin(struct intel_context *ce, bool loop)
 	int ret = 0;
 
 	GEM_BUG_ON(!engine->mask);
+	GEM_BUG_ON(!sched_state_is_init(ce));
 
 	/*
 	 * Ensure LRC + CT vmas are is same region as write barrier is done
@@ -1352,7 +1365,6 @@ static int guc_lrc_desc_pin(struct intel_context *ce, bool loop)
 	desc->priority = ce->guc_prio;
 	desc->context_flags = CONTEXT_REGISTRATION_FLAG_KMD;
 	guc_context_policy_init(engine, desc);
-	init_sched_state(ce);
 
 	/*
 	 * The context_lookup xarray is used to determine if the hardware
-- 
2.32.0

[PATCH 13/23] drm/i915/guc: Don't touch guc_state.sched_state without a lock

[Matthew Brost]

Before we did some clever tricks to not use the a lock when touching
guc_state.sched_state in certain cases. Don't do that, enforce the use
of the lock.

v2:
 (kernel test robo )
  - Add __maybe_unused to sched_state_is_init()

v3: rebase after the unused code path removal has been moved to an
earlier patch.

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reported-by: kernel test robot <lkp@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
---
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 22 ++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

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 e036a171ff17..ca73128d7b4d 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -151,11 +151,23 @@ static inline void clr_context_registered(struct intel_context *ce)
 
 static inline void init_sched_state(struct intel_context *ce)
 {
-	/* Only should be called from guc_lrc_desc_pin() */
+	lockdep_assert_held(&ce->guc_state.lock);
 	atomic_set(&ce->guc_sched_state_no_lock, 0);
 	ce->guc_state.sched_state &= SCHED_STATE_BLOCKED_MASK;
 }
 
+__maybe_unused
+static bool sched_state_is_init(struct intel_context *ce)
+{
+	/*
+	 * XXX: Kernel contexts can have SCHED_STATE_NO_LOCK_REGISTERED after
+	 * suspend.
+	 */
+	return !(atomic_read(&ce->guc_sched_state_no_lock) &
+		 ~SCHED_STATE_NO_LOCK_REGISTERED) &&
+		!(ce->guc_state.sched_state &= ~SCHED_STATE_BLOCKED_MASK);
+}
+
 static inline bool
 context_wait_for_deregister_to_register(struct intel_context *ce)
 {
@@ -166,7 +178,7 @@ context_wait_for_deregister_to_register(struct intel_context *ce)
 static inline void
 set_context_wait_for_deregister_to_register(struct intel_context *ce)
 {
-	/* Only should be called from guc_lrc_desc_pin() without lock */
+	lockdep_assert_held(&ce->guc_state.lock);
 	ce->guc_state.sched_state |=
 		SCHED_STATE_WAIT_FOR_DEREGISTER_TO_REGISTER;
 }
@@ -607,9 +619,7 @@ static void scrub_guc_desc_for_outstanding_g2h(struct intel_guc *guc)
 	bool pending_disable, pending_enable, deregister, destroyed, banned;
 
 	xa_for_each(&guc->context_lookup, index, ce) {
-		/* Flush context */
 		spin_lock_irqsave(&ce->guc_state.lock, flags);
-		spin_unlock_irqrestore(&ce->guc_state.lock, flags);
 
 		/*
 		 * Once we are at this point submission_disabled() is guaranteed
@@ -625,6 +635,8 @@ static void scrub_guc_desc_for_outstanding_g2h(struct intel_guc *guc)
 		banned = context_banned(ce);
 		init_sched_state(ce);
 
+		spin_unlock_irqrestore(&ce->guc_state.lock, flags);
+
 		if (pending_enable || destroyed || deregister) {
 			decr_outstanding_submission_g2h(guc);
 			if (deregister)
@@ -1324,6 +1336,7 @@ static int guc_lrc_desc_pin(struct intel_context *ce, bool loop)
 	int ret = 0;
 
 	GEM_BUG_ON(!engine->mask);
+	GEM_BUG_ON(!sched_state_is_init(ce));
 
 	/*
 	 * Ensure LRC + CT vmas are is same region as write barrier is done
@@ -1352,7 +1365,6 @@ static int guc_lrc_desc_pin(struct intel_context *ce, bool loop)
 	desc->priority = ce->guc_prio;
 	desc->context_flags = CONTEXT_REGISTRATION_FLAG_KMD;
 	guc_context_policy_init(engine, desc);
-	init_sched_state(ce);
 
 	/*
 	 * The context_lookup xarray is used to determine if the hardware
-- 
2.32.0

[PATCH 14/23] drm/i915/guc: Reset LRC descriptor if register returns -ENODEV

[Matthew Brost]

Reset LRC descriptor if a context register returns -ENODEV as this means
we are mid-reset.

Fixes: eb5e7da736f3 ("drm/i915/guc: Reset implementation for new GuC interface")
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
---
 drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

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 ca73128d7b4d..dcd7a09f8559 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -1405,10 +1405,12 @@ static int guc_lrc_desc_pin(struct intel_context *ce, bool loop)
 	} else {
 		with_intel_runtime_pm(runtime_pm, wakeref)
 			ret = register_context(ce, loop);
-		if (unlikely(ret == -EBUSY))
+		if (unlikely(ret == -EBUSY)) {
+			reset_lrc_desc(guc, desc_idx);
+		} else if (unlikely(ret == -ENODEV)) {
 			reset_lrc_desc(guc, desc_idx);
-		else if (unlikely(ret == -ENODEV))
 			ret = 0;	/* Will get registered later */
+		}
 	}
 
 	return ret;
-- 
2.32.0

[Intel-gfx] [PATCH 14/23] drm/i915/guc: Reset LRC descriptor if register returns -ENODEV

[Matthew Brost]

Reset LRC descriptor if a context register returns -ENODEV as this means
we are mid-reset.

Fixes: eb5e7da736f3 ("drm/i915/guc: Reset implementation for new GuC interface")
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
---
 drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

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 ca73128d7b4d..dcd7a09f8559 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -1405,10 +1405,12 @@ static int guc_lrc_desc_pin(struct intel_context *ce, bool loop)
 	} else {
 		with_intel_runtime_pm(runtime_pm, wakeref)
 			ret = register_context(ce, loop);
-		if (unlikely(ret == -EBUSY))
+		if (unlikely(ret == -EBUSY)) {
+			reset_lrc_desc(guc, desc_idx);
+		} else if (unlikely(ret == -ENODEV)) {
 			reset_lrc_desc(guc, desc_idx);
-		else if (unlikely(ret == -ENODEV))
 			ret = 0;	/* Will get registered later */
+		}
 	}
 
 	return ret;
-- 
2.32.0

[PATCH 15/23] drm/i915/guc: Release submit fence from an irq_work

[Matthew Brost]

A subsequent patch will flip the locking hierarchy from
ce->guc_state.lock -> sched_engine->lock to sched_engine->lock ->
ce->guc_state.lock. As such we need to release the submit fence for a
request from an IRQ to break a lock inversion - i.e. the fence must be
release went holding ce->guc_state.lock and the releasing of the can
acquire sched_engine->lock.

v2:
 (Daniele)
  - Delete request from list before calling irq_work_queue

Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
---
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 22 ++++++++++++++++---
 drivers/gpu/drm/i915/i915_request.h           |  5 +++++
 2 files changed, 24 insertions(+), 3 deletions(-)

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 dcd7a09f8559..4b7ccf9730a3 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -2049,17 +2049,32 @@ static const struct intel_context_ops guc_context_ops = {
 	.create_virtual = guc_create_virtual,
 };
 
+static void submit_work_cb(struct irq_work *wrk)
+{
+	struct i915_request *rq = container_of(wrk, typeof(*rq), submit_work);
+
+	might_lock(&rq->engine->sched_engine->lock);
+	i915_sw_fence_complete(&rq->submit);
+}
+
 static void __guc_signal_context_fence(struct intel_context *ce)
 {
-	struct i915_request *rq;
+	struct i915_request *rq, *rn;
 
 	lockdep_assert_held(&ce->guc_state.lock);
 
 	if (!list_empty(&ce->guc_state.fences))
 		trace_intel_context_fence_release(ce);
 
-	list_for_each_entry(rq, &ce->guc_state.fences, guc_fence_link)
-		i915_sw_fence_complete(&rq->submit);
+	/*
+	 * Use an IRQ to ensure locking order of sched_engine->lock ->
+	 * ce->guc_state.lock is preserved.
+	 */
+	list_for_each_entry_safe(rq, rn, &ce->guc_state.fences,
+				 guc_fence_link) {
+		list_del(&rq->guc_fence_link);
+		irq_work_queue(&rq->submit_work);
+	}
 
 	INIT_LIST_HEAD(&ce->guc_state.fences);
 }
@@ -2169,6 +2184,7 @@ static int guc_request_alloc(struct i915_request *rq)
 	spin_lock_irqsave(&ce->guc_state.lock, flags);
 	if (context_wait_for_deregister_to_register(ce) ||
 	    context_pending_disable(ce)) {
+		init_irq_work(&rq->submit_work, submit_work_cb);
 		i915_sw_fence_await(&rq->submit);
 
 		list_add_tail(&rq->guc_fence_link, &ce->guc_state.fences);
diff --git a/drivers/gpu/drm/i915/i915_request.h b/drivers/gpu/drm/i915/i915_request.h
index 1bc1349ba3c2..d818cfbfc41d 100644
--- a/drivers/gpu/drm/i915/i915_request.h
+++ b/drivers/gpu/drm/i915/i915_request.h
@@ -218,6 +218,11 @@ struct i915_request {
 	};
 	struct llist_head execute_cb;
 	struct i915_sw_fence semaphore;
+	/**
+	 * @submit_work: complete submit fence from an IRQ if needed for
+	 * locking hierarchy reasons.
+	 */
+	struct irq_work submit_work;
 
 	/*
 	 * A list of everyone we wait upon, and everyone who waits upon us.
-- 
2.32.0

[Intel-gfx] [PATCH 15/23] drm/i915/guc: Release submit fence from an irq_work

[Matthew Brost]

A subsequent patch will flip the locking hierarchy from
ce->guc_state.lock -> sched_engine->lock to sched_engine->lock ->
ce->guc_state.lock. As such we need to release the submit fence for a
request from an IRQ to break a lock inversion - i.e. the fence must be
release went holding ce->guc_state.lock and the releasing of the can
acquire sched_engine->lock.

v2:
 (Daniele)
  - Delete request from list before calling irq_work_queue

Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
---
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 22 ++++++++++++++++---
 drivers/gpu/drm/i915/i915_request.h           |  5 +++++
 2 files changed, 24 insertions(+), 3 deletions(-)

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 dcd7a09f8559..4b7ccf9730a3 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -2049,17 +2049,32 @@ static const struct intel_context_ops guc_context_ops = {
 	.create_virtual = guc_create_virtual,
 };
 
+static void submit_work_cb(struct irq_work *wrk)
+{
+	struct i915_request *rq = container_of(wrk, typeof(*rq), submit_work);
+
+	might_lock(&rq->engine->sched_engine->lock);
+	i915_sw_fence_complete(&rq->submit);
+}
+
 static void __guc_signal_context_fence(struct intel_context *ce)
 {
-	struct i915_request *rq;
+	struct i915_request *rq, *rn;
 
 	lockdep_assert_held(&ce->guc_state.lock);
 
 	if (!list_empty(&ce->guc_state.fences))
 		trace_intel_context_fence_release(ce);
 
-	list_for_each_entry(rq, &ce->guc_state.fences, guc_fence_link)
-		i915_sw_fence_complete(&rq->submit);
+	/*
+	 * Use an IRQ to ensure locking order of sched_engine->lock ->
+	 * ce->guc_state.lock is preserved.
+	 */
+	list_for_each_entry_safe(rq, rn, &ce->guc_state.fences,
+				 guc_fence_link) {
+		list_del(&rq->guc_fence_link);
+		irq_work_queue(&rq->submit_work);
+	}
 
 	INIT_LIST_HEAD(&ce->guc_state.fences);
 }
@@ -2169,6 +2184,7 @@ static int guc_request_alloc(struct i915_request *rq)
 	spin_lock_irqsave(&ce->guc_state.lock, flags);
 	if (context_wait_for_deregister_to_register(ce) ||
 	    context_pending_disable(ce)) {
+		init_irq_work(&rq->submit_work, submit_work_cb);
 		i915_sw_fence_await(&rq->submit);
 
 		list_add_tail(&rq->guc_fence_link, &ce->guc_state.fences);
diff --git a/drivers/gpu/drm/i915/i915_request.h b/drivers/gpu/drm/i915/i915_request.h
index 1bc1349ba3c2..d818cfbfc41d 100644
--- a/drivers/gpu/drm/i915/i915_request.h
+++ b/drivers/gpu/drm/i915/i915_request.h
@@ -218,6 +218,11 @@ struct i915_request {
 	};
 	struct llist_head execute_cb;
 	struct i915_sw_fence semaphore;
+	/**
+	 * @submit_work: complete submit fence from an IRQ if needed for
+	 * locking hierarchy reasons.
+	 */
+	struct irq_work submit_work;
 
 	/*
 	 * A list of everyone we wait upon, and everyone who waits upon us.
-- 
2.32.0

[PATCH 16/23] drm/i915/guc: Move guc_blocked fence to struct guc_state

[Matthew Brost]

Move guc_blocked fence to struct guc_state as the lock which protects
the fence lives there.

s/ce->guc_blocked/ce->guc_state.blocked/g

v2:
 (Daniele)
  - s/blocked_fence/blocked/g

Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
---
 drivers/gpu/drm/i915/gt/intel_context.c        |  5 +++--
 drivers/gpu/drm/i915/gt/intel_context_types.h  |  5 ++---
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c  | 18 +++++++++---------
 3 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_context.c b/drivers/gpu/drm/i915/gt/intel_context.c
index 745e84c72c90..3048267ddc7e 100644
--- a/drivers/gpu/drm/i915/gt/intel_context.c
+++ b/drivers/gpu/drm/i915/gt/intel_context.c
@@ -405,8 +405,9 @@ intel_context_init(struct intel_context *ce, struct intel_engine_cs *engine)
 	 * Initialize fence to be complete as this is expected to be complete
 	 * unless there is a pending schedule disable outstanding.
 	 */
-	i915_sw_fence_init(&ce->guc_blocked, sw_fence_dummy_notify);
-	i915_sw_fence_commit(&ce->guc_blocked);
+	i915_sw_fence_init(&ce->guc_state.blocked,
+			   sw_fence_dummy_notify);
+	i915_sw_fence_commit(&ce->guc_state.blocked);
 
 	i915_active_init(&ce->active,
 			 __intel_context_active, __intel_context_retire, 0);
diff --git a/drivers/gpu/drm/i915/gt/intel_context_types.h b/drivers/gpu/drm/i915/gt/intel_context_types.h
index 3a73f3117873..5aecb9038b5b 100644
--- a/drivers/gpu/drm/i915/gt/intel_context_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_context_types.h
@@ -167,6 +167,8 @@ struct intel_context {
 		 * fence related to GuC submission
 		 */
 		struct list_head fences;
+		/* GuC context blocked fence */
+		struct i915_sw_fence blocked;
 	} guc_state;
 
 	struct {
@@ -190,9 +192,6 @@ struct intel_context {
 	 */
 	struct list_head guc_id_link;
 
-	/* GuC context blocked fence */
-	struct i915_sw_fence guc_blocked;
-
 	/*
 	 * GuC priority management
 	 */
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 4b7ccf9730a3..99f223114331 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -1502,24 +1502,24 @@ static void guc_blocked_fence_complete(struct intel_context *ce)
 {
 	lockdep_assert_held(&ce->guc_state.lock);
 
-	if (!i915_sw_fence_done(&ce->guc_blocked))
-		i915_sw_fence_complete(&ce->guc_blocked);
+	if (!i915_sw_fence_done(&ce->guc_state.blocked))
+		i915_sw_fence_complete(&ce->guc_state.blocked);
 }
 
 static void guc_blocked_fence_reinit(struct intel_context *ce)
 {
 	lockdep_assert_held(&ce->guc_state.lock);
-	GEM_BUG_ON(!i915_sw_fence_done(&ce->guc_blocked));
+	GEM_BUG_ON(!i915_sw_fence_done(&ce->guc_state.blocked));
 
 	/*
 	 * This fence is always complete unless a pending schedule disable is
 	 * outstanding. We arm the fence here and complete it when we receive
 	 * the pending schedule disable complete message.
 	 */
-	i915_sw_fence_fini(&ce->guc_blocked);
-	i915_sw_fence_reinit(&ce->guc_blocked);
-	i915_sw_fence_await(&ce->guc_blocked);
-	i915_sw_fence_commit(&ce->guc_blocked);
+	i915_sw_fence_fini(&ce->guc_state.blocked);
+	i915_sw_fence_reinit(&ce->guc_state.blocked);
+	i915_sw_fence_await(&ce->guc_state.blocked);
+	i915_sw_fence_commit(&ce->guc_state.blocked);
 }
 
 static u16 prep_context_pending_disable(struct intel_context *ce)
@@ -1559,7 +1559,7 @@ static struct i915_sw_fence *guc_context_block(struct intel_context *ce)
 		if (enabled)
 			clr_context_enabled(ce);
 		spin_unlock_irqrestore(&ce->guc_state.lock, flags);
-		return &ce->guc_blocked;
+		return &ce->guc_state.blocked;
 	}
 
 	/*
@@ -1575,7 +1575,7 @@ static struct i915_sw_fence *guc_context_block(struct intel_context *ce)
 	with_intel_runtime_pm(runtime_pm, wakeref)
 		__guc_context_sched_disable(guc, ce, guc_id);
 
-	return &ce->guc_blocked;
+	return &ce->guc_state.blocked;
 }
 
 #define SCHED_STATE_MULTI_BLOCKED_MASK \
-- 
2.32.0

[Intel-gfx] [PATCH 16/23] drm/i915/guc: Move guc_blocked fence to struct guc_state

[Matthew Brost]

Move guc_blocked fence to struct guc_state as the lock which protects
the fence lives there.

s/ce->guc_blocked/ce->guc_state.blocked/g

v2:
 (Daniele)
  - s/blocked_fence/blocked/g

Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
---
 drivers/gpu/drm/i915/gt/intel_context.c        |  5 +++--
 drivers/gpu/drm/i915/gt/intel_context_types.h  |  5 ++---
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c  | 18 +++++++++---------
 3 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_context.c b/drivers/gpu/drm/i915/gt/intel_context.c
index 745e84c72c90..3048267ddc7e 100644
--- a/drivers/gpu/drm/i915/gt/intel_context.c
+++ b/drivers/gpu/drm/i915/gt/intel_context.c
@@ -405,8 +405,9 @@ intel_context_init(struct intel_context *ce, struct intel_engine_cs *engine)
 	 * Initialize fence to be complete as this is expected to be complete
 	 * unless there is a pending schedule disable outstanding.
 	 */
-	i915_sw_fence_init(&ce->guc_blocked, sw_fence_dummy_notify);
-	i915_sw_fence_commit(&ce->guc_blocked);
+	i915_sw_fence_init(&ce->guc_state.blocked,
+			   sw_fence_dummy_notify);
+	i915_sw_fence_commit(&ce->guc_state.blocked);
 
 	i915_active_init(&ce->active,
 			 __intel_context_active, __intel_context_retire, 0);
diff --git a/drivers/gpu/drm/i915/gt/intel_context_types.h b/drivers/gpu/drm/i915/gt/intel_context_types.h
index 3a73f3117873..5aecb9038b5b 100644
--- a/drivers/gpu/drm/i915/gt/intel_context_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_context_types.h
@@ -167,6 +167,8 @@ struct intel_context {
 		 * fence related to GuC submission
 		 */
 		struct list_head fences;
+		/* GuC context blocked fence */
+		struct i915_sw_fence blocked;
 	} guc_state;
 
 	struct {
@@ -190,9 +192,6 @@ struct intel_context {
 	 */
 	struct list_head guc_id_link;
 
-	/* GuC context blocked fence */
-	struct i915_sw_fence guc_blocked;
-
 	/*
 	 * GuC priority management
 	 */
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 4b7ccf9730a3..99f223114331 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -1502,24 +1502,24 @@ static void guc_blocked_fence_complete(struct intel_context *ce)
 {
 	lockdep_assert_held(&ce->guc_state.lock);
 
-	if (!i915_sw_fence_done(&ce->guc_blocked))
-		i915_sw_fence_complete(&ce->guc_blocked);
+	if (!i915_sw_fence_done(&ce->guc_state.blocked))
+		i915_sw_fence_complete(&ce->guc_state.blocked);
 }
 
 static void guc_blocked_fence_reinit(struct intel_context *ce)
 {
 	lockdep_assert_held(&ce->guc_state.lock);
-	GEM_BUG_ON(!i915_sw_fence_done(&ce->guc_blocked));
+	GEM_BUG_ON(!i915_sw_fence_done(&ce->guc_state.blocked));
 
 	/*
 	 * This fence is always complete unless a pending schedule disable is
 	 * outstanding. We arm the fence here and complete it when we receive
 	 * the pending schedule disable complete message.
 	 */
-	i915_sw_fence_fini(&ce->guc_blocked);
-	i915_sw_fence_reinit(&ce->guc_blocked);
-	i915_sw_fence_await(&ce->guc_blocked);
-	i915_sw_fence_commit(&ce->guc_blocked);
+	i915_sw_fence_fini(&ce->guc_state.blocked);
+	i915_sw_fence_reinit(&ce->guc_state.blocked);
+	i915_sw_fence_await(&ce->guc_state.blocked);
+	i915_sw_fence_commit(&ce->guc_state.blocked);
 }
 
 static u16 prep_context_pending_disable(struct intel_context *ce)
@@ -1559,7 +1559,7 @@ static struct i915_sw_fence *guc_context_block(struct intel_context *ce)
 		if (enabled)
 			clr_context_enabled(ce);
 		spin_unlock_irqrestore(&ce->guc_state.lock, flags);
-		return &ce->guc_blocked;
+		return &ce->guc_state.blocked;
 	}
 
 	/*
@@ -1575,7 +1575,7 @@ static struct i915_sw_fence *guc_context_block(struct intel_context *ce)
 	with_intel_runtime_pm(runtime_pm, wakeref)
 		__guc_context_sched_disable(guc, ce, guc_id);
 
-	return &ce->guc_blocked;
+	return &ce->guc_state.blocked;
 }
 
 #define SCHED_STATE_MULTI_BLOCKED_MASK \
-- 
2.32.0

[PATCH 17/23] drm/i915/guc: Rework and simplify locking

[Matthew Brost]

Rework and simplify the locking with GuC subission. Drop
sched_state_no_lock and move all fields under the guc_state.sched_state
and protect all these fields with guc_state.lock . This requires
changing the locking hierarchy from guc_state.lock -> sched_engine.lock
to sched_engine.lock -> guc_state.lock.

v2:
 (Daniele)
  - Don't check fields outside of lock during sched disable, check less
    fields within lock as some of the outside are no longer needed

Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
---
 drivers/gpu/drm/i915/gt/intel_context_types.h |   5 +-
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 199 ++++++++----------
 drivers/gpu/drm/i915/i915_trace.h             |   6 +-
 3 files changed, 90 insertions(+), 120 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_context_types.h b/drivers/gpu/drm/i915/gt/intel_context_types.h
index 5aecb9038b5b..d2f798ef678c 100644
--- a/drivers/gpu/drm/i915/gt/intel_context_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_context_types.h
@@ -161,7 +161,7 @@ struct intel_context {
 		 * sched_state: scheduling state of this context using GuC
 		 * submission
 		 */
-		u16 sched_state;
+		u32 sched_state;
 		/*
 		 * fences: maintains of list of requests that have a submit
 		 * fence related to GuC submission
@@ -178,9 +178,6 @@ struct intel_context {
 		struct list_head requests;
 	} guc_active;
 
-	/* GuC scheduling state flags that do not require a lock. */
-	atomic_t guc_sched_state_no_lock;
-
 	/* GuC LRC descriptor ID */
 	u16 guc_id;
 
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 99f223114331..383dc1017004 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -72,87 +72,24 @@ guc_create_virtual(struct intel_engine_cs **siblings, unsigned int count);
 
 #define GUC_REQUEST_SIZE 64 /* bytes */
 
-/*
- * Below is a set of functions which control the GuC scheduling state which do
- * not require a lock as all state transitions are mutually exclusive. i.e. It
- * is not possible for the context pinning code and submission, for the same
- * context, to be executing simultaneously. We still need an atomic as it is
- * possible for some of the bits to changing at the same time though.
- */
-#define SCHED_STATE_NO_LOCK_ENABLED			BIT(0)
-#define SCHED_STATE_NO_LOCK_PENDING_ENABLE		BIT(1)
-#define SCHED_STATE_NO_LOCK_REGISTERED			BIT(2)
-static inline bool context_enabled(struct intel_context *ce)
-{
-	return (atomic_read(&ce->guc_sched_state_no_lock) &
-		SCHED_STATE_NO_LOCK_ENABLED);
-}
-
-static inline void set_context_enabled(struct intel_context *ce)
-{
-	atomic_or(SCHED_STATE_NO_LOCK_ENABLED, &ce->guc_sched_state_no_lock);
-}
-
-static inline void clr_context_enabled(struct intel_context *ce)
-{
-	atomic_and((u32)~SCHED_STATE_NO_LOCK_ENABLED,
-		   &ce->guc_sched_state_no_lock);
-}
-
-static inline bool context_pending_enable(struct intel_context *ce)
-{
-	return (atomic_read(&ce->guc_sched_state_no_lock) &
-		SCHED_STATE_NO_LOCK_PENDING_ENABLE);
-}
-
-static inline void set_context_pending_enable(struct intel_context *ce)
-{
-	atomic_or(SCHED_STATE_NO_LOCK_PENDING_ENABLE,
-		  &ce->guc_sched_state_no_lock);
-}
-
-static inline void clr_context_pending_enable(struct intel_context *ce)
-{
-	atomic_and((u32)~SCHED_STATE_NO_LOCK_PENDING_ENABLE,
-		   &ce->guc_sched_state_no_lock);
-}
-
-static inline bool context_registered(struct intel_context *ce)
-{
-	return (atomic_read(&ce->guc_sched_state_no_lock) &
-		SCHED_STATE_NO_LOCK_REGISTERED);
-}
-
-static inline void set_context_registered(struct intel_context *ce)
-{
-	atomic_or(SCHED_STATE_NO_LOCK_REGISTERED,
-		  &ce->guc_sched_state_no_lock);
-}
-
-static inline void clr_context_registered(struct intel_context *ce)
-{
-	atomic_and((u32)~SCHED_STATE_NO_LOCK_REGISTERED,
-		   &ce->guc_sched_state_no_lock);
-}
-
 /*
  * Below is a set of functions which control the GuC scheduling state which
- * require a lock, aside from the special case where the functions are called
- * from guc_lrc_desc_pin(). In that case it isn't possible for any other code
- * path to be executing on the context.
+ * require a lock.
  */
 #define SCHED_STATE_WAIT_FOR_DEREGISTER_TO_REGISTER	BIT(0)
 #define SCHED_STATE_DESTROYED				BIT(1)
 #define SCHED_STATE_PENDING_DISABLE			BIT(2)
 #define SCHED_STATE_BANNED				BIT(3)
-#define SCHED_STATE_BLOCKED_SHIFT			4
+#define SCHED_STATE_ENABLED				BIT(4)
+#define SCHED_STATE_PENDING_ENABLE			BIT(5)
+#define SCHED_STATE_REGISTERED				BIT(6)
+#define SCHED_STATE_BLOCKED_SHIFT			7
 #define SCHED_STATE_BLOCKED		BIT(SCHED_STATE_BLOCKED_SHIFT)
 #define SCHED_STATE_BLOCKED_MASK	(0xfff << SCHED_STATE_BLOCKED_SHIFT)
 
 static inline void init_sched_state(struct intel_context *ce)
 {
 	lockdep_assert_held(&ce->guc_state.lock);
-	atomic_set(&ce->guc_sched_state_no_lock, 0);
 	ce->guc_state.sched_state &= SCHED_STATE_BLOCKED_MASK;
 }
 
@@ -163,9 +100,8 @@ static bool sched_state_is_init(struct intel_context *ce)
 	 * XXX: Kernel contexts can have SCHED_STATE_NO_LOCK_REGISTERED after
 	 * suspend.
 	 */
-	return !(atomic_read(&ce->guc_sched_state_no_lock) &
-		 ~SCHED_STATE_NO_LOCK_REGISTERED) &&
-		!(ce->guc_state.sched_state &= ~SCHED_STATE_BLOCKED_MASK);
+	return !(ce->guc_state.sched_state &=
+		 ~(SCHED_STATE_BLOCKED_MASK | SCHED_STATE_REGISTERED));
 }
 
 static inline bool
@@ -238,6 +174,57 @@ static inline void clr_context_banned(struct intel_context *ce)
 	ce->guc_state.sched_state &= ~SCHED_STATE_BANNED;
 }
 
+static inline bool context_enabled(struct intel_context *ce)
+{
+	return ce->guc_state.sched_state & SCHED_STATE_ENABLED;
+}
+
+static inline void set_context_enabled(struct intel_context *ce)
+{
+	lockdep_assert_held(&ce->guc_state.lock);
+	ce->guc_state.sched_state |= SCHED_STATE_ENABLED;
+}
+
+static inline void clr_context_enabled(struct intel_context *ce)
+{
+	lockdep_assert_held(&ce->guc_state.lock);
+	ce->guc_state.sched_state &= ~SCHED_STATE_ENABLED;
+}
+
+static inline bool context_pending_enable(struct intel_context *ce)
+{
+	return ce->guc_state.sched_state & SCHED_STATE_PENDING_ENABLE;
+}
+
+static inline void set_context_pending_enable(struct intel_context *ce)
+{
+	lockdep_assert_held(&ce->guc_state.lock);
+	ce->guc_state.sched_state |= SCHED_STATE_PENDING_ENABLE;
+}
+
+static inline void clr_context_pending_enable(struct intel_context *ce)
+{
+	lockdep_assert_held(&ce->guc_state.lock);
+	ce->guc_state.sched_state &= ~SCHED_STATE_PENDING_ENABLE;
+}
+
+static inline bool context_registered(struct intel_context *ce)
+{
+	return ce->guc_state.sched_state & SCHED_STATE_REGISTERED;
+}
+
+static inline void set_context_registered(struct intel_context *ce)
+{
+	lockdep_assert_held(&ce->guc_state.lock);
+	ce->guc_state.sched_state |= SCHED_STATE_REGISTERED;
+}
+
+static inline void clr_context_registered(struct intel_context *ce)
+{
+	lockdep_assert_held(&ce->guc_state.lock);
+	ce->guc_state.sched_state &= ~SCHED_STATE_REGISTERED;
+}
+
 static inline u32 context_blocked(struct intel_context *ce)
 {
 	return (ce->guc_state.sched_state & SCHED_STATE_BLOCKED_MASK) >>
@@ -246,7 +233,6 @@ static inline u32 context_blocked(struct intel_context *ce)
 
 static inline void incr_context_blocked(struct intel_context *ce)
 {
-	lockdep_assert_held(&ce->engine->sched_engine->lock);
 	lockdep_assert_held(&ce->guc_state.lock);
 
 	ce->guc_state.sched_state += SCHED_STATE_BLOCKED;
@@ -256,7 +242,6 @@ static inline void incr_context_blocked(struct intel_context *ce)
 
 static inline void decr_context_blocked(struct intel_context *ce)
 {
-	lockdep_assert_held(&ce->engine->sched_engine->lock);
 	lockdep_assert_held(&ce->guc_state.lock);
 
 	GEM_BUG_ON(!context_blocked(ce));	/* Underflow check */
@@ -452,6 +437,8 @@ static int guc_add_request(struct intel_guc *guc, struct i915_request *rq)
 	u32 g2h_len_dw = 0;
 	bool enabled;
 
+	lockdep_assert_held(&rq->engine->sched_engine->lock);
+
 	/*
 	 * Corner case where requests were sitting in the priority list or a
 	 * request resubmitted after the context was banned.
@@ -459,7 +446,7 @@ static int guc_add_request(struct intel_guc *guc, struct i915_request *rq)
 	if (unlikely(intel_context_is_banned(ce))) {
 		i915_request_put(i915_request_mark_eio(rq));
 		intel_engine_signal_breadcrumbs(ce->engine);
-		goto out;
+		return 0;
 	}
 
 	GEM_BUG_ON(!atomic_read(&ce->guc_id_ref));
@@ -472,9 +459,11 @@ static int guc_add_request(struct intel_guc *guc, struct i915_request *rq)
 	if (unlikely(!lrc_desc_registered(guc, ce->guc_id))) {
 		err = guc_lrc_desc_pin(ce, false);
 		if (unlikely(err))
-			goto out;
+			return err;
 	}
 
+	spin_lock(&ce->guc_state.lock);
+
 	/*
 	 * The request / context will be run on the hardware when scheduling
 	 * gets enabled in the unblock.
@@ -509,6 +498,7 @@ static int guc_add_request(struct intel_guc *guc, struct i915_request *rq)
 		trace_i915_request_guc_submit(rq);
 
 out:
+	spin_unlock(&ce->guc_state.lock);
 	return err;
 }
 
@@ -747,6 +737,7 @@ void intel_guc_submission_reset_prepare(struct intel_guc *guc)
 			wait_for_reset(guc, &guc->outstanding_submission_g2h);
 		} while (!list_empty(&guc->ct.requests.incoming));
 	}
+
 	scrub_guc_desc_for_outstanding_g2h(guc);
 }
 
@@ -1147,7 +1138,11 @@ static int steal_guc_id(struct intel_guc *guc)
 
 		list_del_init(&ce->guc_id_link);
 		guc_id = ce->guc_id;
+
+		spin_lock(&ce->guc_state.lock);
 		clr_context_registered(ce);
+		spin_unlock(&ce->guc_state.lock);
+
 		set_context_guc_id_invalid(ce);
 		return guc_id;
 	} else {
@@ -1183,6 +1178,8 @@ static int pin_guc_id(struct intel_guc *guc, struct intel_context *ce)
 try_again:
 	spin_lock_irqsave(&guc->contexts_lock, flags);
 
+	might_lock(&ce->guc_state.lock);
+
 	if (context_guc_id_invalid(ce)) {
 		ret = assign_guc_id(guc, &ce->guc_id);
 		if (ret)
@@ -1262,8 +1259,13 @@ static int register_context(struct intel_context *ce, bool loop)
 	trace_intel_context_register(ce);
 
 	ret = __guc_action_register_context(guc, ce->guc_id, offset, loop);
-	if (likely(!ret))
+	if (likely(!ret)) {
+		unsigned long flags;
+
+		spin_lock_irqsave(&ce->guc_state.lock, flags);
 		set_context_registered(ce);
+		spin_unlock_irqrestore(&ce->guc_state.lock, flags);
+	}
 
 	return ret;
 }
@@ -1537,7 +1539,6 @@ static u16 prep_context_pending_disable(struct intel_context *ce)
 static struct i915_sw_fence *guc_context_block(struct intel_context *ce)
 {
 	struct intel_guc *guc = ce_to_guc(ce);
-	struct i915_sched_engine *sched_engine = ce->engine->sched_engine;
 	unsigned long flags;
 	struct intel_runtime_pm *runtime_pm = ce->engine->uncore->rpm;
 	intel_wakeref_t wakeref;
@@ -1546,13 +1547,7 @@ static struct i915_sw_fence *guc_context_block(struct intel_context *ce)
 
 	spin_lock_irqsave(&ce->guc_state.lock, flags);
 
-	/*
-	 * Sync with submission path, increment before below changes to context
-	 * state.
-	 */
-	spin_lock(&sched_engine->lock);
 	incr_context_blocked(ce);
-	spin_unlock(&sched_engine->lock);
 
 	enabled = context_enabled(ce);
 	if (unlikely(!enabled || submission_disabled(guc))) {
@@ -1598,7 +1593,6 @@ static bool context_cant_unblock(struct intel_context *ce)
 static void guc_context_unblock(struct intel_context *ce)
 {
 	struct intel_guc *guc = ce_to_guc(ce);
-	struct i915_sched_engine *sched_engine = ce->engine->sched_engine;
 	unsigned long flags;
 	struct intel_runtime_pm *runtime_pm = ce->engine->uncore->rpm;
 	intel_wakeref_t wakeref;
@@ -1618,13 +1612,7 @@ static void guc_context_unblock(struct intel_context *ce)
 		intel_context_get(ce);
 	}
 
-	/*
-	 * Sync with submission path, decrement after above changes to context
-	 * state.
-	 */
-	spin_lock(&sched_engine->lock);
 	decr_context_blocked(ce);
-	spin_unlock(&sched_engine->lock);
 
 	spin_unlock_irqrestore(&ce->guc_state.lock, flags);
 
@@ -1730,16 +1718,6 @@ static void guc_context_sched_disable(struct intel_context *ce)
 	struct intel_runtime_pm *runtime_pm = &ce->engine->gt->i915->runtime_pm;
 	intel_wakeref_t wakeref;
 	u16 guc_id;
-	bool enabled;
-
-	if (submission_disabled(guc) || context_guc_id_invalid(ce) ||
-	    !lrc_desc_registered(guc, ce->guc_id)) {
-		clr_context_enabled(ce);
-		goto unpin;
-	}
-
-	if (!context_enabled(ce))
-		goto unpin;
 
 	spin_lock_irqsave(&ce->guc_state.lock, flags);
 
@@ -1753,10 +1731,8 @@ static void guc_context_sched_disable(struct intel_context *ce)
 	 * sleep) ensures another process doesn't pin this context and generate
 	 * a request before we set the 'context_pending_disable' flag here.
 	 */
-	enabled = context_enabled(ce);
-	if (unlikely(!enabled || submission_disabled(guc))) {
-		if (enabled)
-			clr_context_enabled(ce);
+	if (unlikely(!context_enabled(ce) || submission_disabled(guc))) {
+		clr_context_enabled(ce);
 		spin_unlock_irqrestore(&ce->guc_state.lock, flags);
 		goto unpin;
 	}
@@ -1784,7 +1760,6 @@ static inline void guc_lrc_desc_unpin(struct intel_context *ce)
 	GEM_BUG_ON(ce != __get_context(guc, ce->guc_id));
 	GEM_BUG_ON(context_enabled(ce));
 
-	clr_context_registered(ce);
 	deregister_context(ce, ce->guc_id);
 }
 
@@ -1857,8 +1832,10 @@ static void guc_context_destroy(struct kref *kref)
 	/* Seal race with Reset */
 	spin_lock_irqsave(&ce->guc_state.lock, flags);
 	disabled = submission_disabled(guc);
-	if (likely(!disabled))
+	if (likely(!disabled)) {
 		set_context_destroyed(ce);
+		clr_context_registered(ce);
+	}
 	spin_unlock_irqrestore(&ce->guc_state.lock, flags);
 	if (unlikely(disabled)) {
 		release_guc_id(guc, ce);
@@ -2724,8 +2701,7 @@ int intel_guc_sched_done_process_msg(struct intel_guc *guc,
 		     (!context_pending_enable(ce) &&
 		     !context_pending_disable(ce)))) {
 		drm_err(&guc_to_gt(guc)->i915->drm,
-			"Bad context sched_state 0x%x, 0x%x, desc_idx %u",
-			atomic_read(&ce->guc_sched_state_no_lock),
+			"Bad context sched_state 0x%x, desc_idx %u",
 			ce->guc_state.sched_state, desc_idx);
 		return -EPROTO;
 	}
@@ -2740,7 +2716,9 @@ int intel_guc_sched_done_process_msg(struct intel_guc *guc,
 		}
 #endif
 
+		spin_lock_irqsave(&ce->guc_state.lock, flags);
 		clr_context_pending_enable(ce);
+		spin_unlock_irqrestore(&ce->guc_state.lock, flags);
 	} else if (context_pending_disable(ce)) {
 		bool banned;
 
@@ -3014,9 +2992,8 @@ void intel_guc_submission_print_context_info(struct intel_guc *guc,
 			   atomic_read(&ce->pin_count));
 		drm_printf(p, "\t\tGuC ID Ref Count: %u\n",
 			   atomic_read(&ce->guc_id_ref));
-		drm_printf(p, "\t\tSchedule State: 0x%x, 0x%x\n\n",
-			   ce->guc_state.sched_state,
-			   atomic_read(&ce->guc_sched_state_no_lock));
+		drm_printf(p, "\t\tSchedule State: 0x%x\n\n",
+			   ce->guc_state.sched_state);
 
 		guc_log_context_priority(p, ce);
 	}
diff --git a/drivers/gpu/drm/i915/i915_trace.h b/drivers/gpu/drm/i915/i915_trace.h
index 237e5061381b..510168c1d703 100644
--- a/drivers/gpu/drm/i915/i915_trace.h
+++ b/drivers/gpu/drm/i915/i915_trace.h
@@ -903,7 +903,6 @@ DECLARE_EVENT_CLASS(intel_context,
 			     __field(u32, guc_id)
 			     __field(int, pin_count)
 			     __field(u32, sched_state)
-			     __field(u32, guc_sched_state_no_lock)
 			     __field(u8, guc_prio)
 			     ),
 
@@ -911,15 +910,12 @@ DECLARE_EVENT_CLASS(intel_context,
 			   __entry->guc_id = ce->guc_id;
 			   __entry->pin_count = atomic_read(&ce->pin_count);
 			   __entry->sched_state = ce->guc_state.sched_state;
-			   __entry->guc_sched_state_no_lock =
-			   atomic_read(&ce->guc_sched_state_no_lock);
 			   __entry->guc_prio = ce->guc_prio;
 			   ),
 
-		    TP_printk("guc_id=%d, pin_count=%d sched_state=0x%x,0x%x, guc_prio=%u",
+		    TP_printk("guc_id=%d, pin_count=%d sched_state=0x%x, guc_prio=%u",
 			      __entry->guc_id, __entry->pin_count,
 			      __entry->sched_state,
-			      __entry->guc_sched_state_no_lock,
 			      __entry->guc_prio)
 );
 
-- 
2.32.0

[Intel-gfx] [PATCH 17/23] drm/i915/guc: Rework and simplify locking

[Matthew Brost]

Rework and simplify the locking with GuC subission. Drop
sched_state_no_lock and move all fields under the guc_state.sched_state
and protect all these fields with guc_state.lock . This requires
changing the locking hierarchy from guc_state.lock -> sched_engine.lock
to sched_engine.lock -> guc_state.lock.

v2:
 (Daniele)
  - Don't check fields outside of lock during sched disable, check less
    fields within lock as some of the outside are no longer needed

Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
---
 drivers/gpu/drm/i915/gt/intel_context_types.h |   5 +-
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 199 ++++++++----------
 drivers/gpu/drm/i915/i915_trace.h             |   6 +-
 3 files changed, 90 insertions(+), 120 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_context_types.h b/drivers/gpu/drm/i915/gt/intel_context_types.h
index 5aecb9038b5b..d2f798ef678c 100644
--- a/drivers/gpu/drm/i915/gt/intel_context_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_context_types.h
@@ -161,7 +161,7 @@ struct intel_context {
 		 * sched_state: scheduling state of this context using GuC
 		 * submission
 		 */
-		u16 sched_state;
+		u32 sched_state;
 		/*
 		 * fences: maintains of list of requests that have a submit
 		 * fence related to GuC submission
@@ -178,9 +178,6 @@ struct intel_context {
 		struct list_head requests;
 	} guc_active;
 
-	/* GuC scheduling state flags that do not require a lock. */
-	atomic_t guc_sched_state_no_lock;
-
 	/* GuC LRC descriptor ID */
 	u16 guc_id;
 
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 99f223114331..383dc1017004 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -72,87 +72,24 @@ guc_create_virtual(struct intel_engine_cs **siblings, unsigned int count);
 
 #define GUC_REQUEST_SIZE 64 /* bytes */
 
-/*
- * Below is a set of functions which control the GuC scheduling state which do
- * not require a lock as all state transitions are mutually exclusive. i.e. It
- * is not possible for the context pinning code and submission, for the same
- * context, to be executing simultaneously. We still need an atomic as it is
- * possible for some of the bits to changing at the same time though.
- */
-#define SCHED_STATE_NO_LOCK_ENABLED			BIT(0)
-#define SCHED_STATE_NO_LOCK_PENDING_ENABLE		BIT(1)
-#define SCHED_STATE_NO_LOCK_REGISTERED			BIT(2)
-static inline bool context_enabled(struct intel_context *ce)
-{
-	return (atomic_read(&ce->guc_sched_state_no_lock) &
-		SCHED_STATE_NO_LOCK_ENABLED);
-}
-
-static inline void set_context_enabled(struct intel_context *ce)
-{
-	atomic_or(SCHED_STATE_NO_LOCK_ENABLED, &ce->guc_sched_state_no_lock);
-}
-
-static inline void clr_context_enabled(struct intel_context *ce)
-{
-	atomic_and((u32)~SCHED_STATE_NO_LOCK_ENABLED,
-		   &ce->guc_sched_state_no_lock);
-}
-
-static inline bool context_pending_enable(struct intel_context *ce)
-{
-	return (atomic_read(&ce->guc_sched_state_no_lock) &
-		SCHED_STATE_NO_LOCK_PENDING_ENABLE);
-}
-
-static inline void set_context_pending_enable(struct intel_context *ce)
-{
-	atomic_or(SCHED_STATE_NO_LOCK_PENDING_ENABLE,
-		  &ce->guc_sched_state_no_lock);
-}
-
-static inline void clr_context_pending_enable(struct intel_context *ce)
-{
-	atomic_and((u32)~SCHED_STATE_NO_LOCK_PENDING_ENABLE,
-		   &ce->guc_sched_state_no_lock);
-}
-
-static inline bool context_registered(struct intel_context *ce)
-{
-	return (atomic_read(&ce->guc_sched_state_no_lock) &
-		SCHED_STATE_NO_LOCK_REGISTERED);
-}
-
-static inline void set_context_registered(struct intel_context *ce)
-{
-	atomic_or(SCHED_STATE_NO_LOCK_REGISTERED,
-		  &ce->guc_sched_state_no_lock);
-}
-
-static inline void clr_context_registered(struct intel_context *ce)
-{
-	atomic_and((u32)~SCHED_STATE_NO_LOCK_REGISTERED,
-		   &ce->guc_sched_state_no_lock);
-}
-
 /*
  * Below is a set of functions which control the GuC scheduling state which
- * require a lock, aside from the special case where the functions are called
- * from guc_lrc_desc_pin(). In that case it isn't possible for any other code
- * path to be executing on the context.
+ * require a lock.
  */
 #define SCHED_STATE_WAIT_FOR_DEREGISTER_TO_REGISTER	BIT(0)
 #define SCHED_STATE_DESTROYED				BIT(1)
 #define SCHED_STATE_PENDING_DISABLE			BIT(2)
 #define SCHED_STATE_BANNED				BIT(3)
-#define SCHED_STATE_BLOCKED_SHIFT			4
+#define SCHED_STATE_ENABLED				BIT(4)
+#define SCHED_STATE_PENDING_ENABLE			BIT(5)
+#define SCHED_STATE_REGISTERED				BIT(6)
+#define SCHED_STATE_BLOCKED_SHIFT			7
 #define SCHED_STATE_BLOCKED		BIT(SCHED_STATE_BLOCKED_SHIFT)
 #define SCHED_STATE_BLOCKED_MASK	(0xfff << SCHED_STATE_BLOCKED_SHIFT)
 
 static inline void init_sched_state(struct intel_context *ce)
 {
 	lockdep_assert_held(&ce->guc_state.lock);
-	atomic_set(&ce->guc_sched_state_no_lock, 0);
 	ce->guc_state.sched_state &= SCHED_STATE_BLOCKED_MASK;
 }
 
@@ -163,9 +100,8 @@ static bool sched_state_is_init(struct intel_context *ce)
 	 * XXX: Kernel contexts can have SCHED_STATE_NO_LOCK_REGISTERED after
 	 * suspend.
 	 */
-	return !(atomic_read(&ce->guc_sched_state_no_lock) &
-		 ~SCHED_STATE_NO_LOCK_REGISTERED) &&
-		!(ce->guc_state.sched_state &= ~SCHED_STATE_BLOCKED_MASK);
+	return !(ce->guc_state.sched_state &=
+		 ~(SCHED_STATE_BLOCKED_MASK | SCHED_STATE_REGISTERED));
 }
 
 static inline bool
@@ -238,6 +174,57 @@ static inline void clr_context_banned(struct intel_context *ce)
 	ce->guc_state.sched_state &= ~SCHED_STATE_BANNED;
 }
 
+static inline bool context_enabled(struct intel_context *ce)
+{
+	return ce->guc_state.sched_state & SCHED_STATE_ENABLED;
+}
+
+static inline void set_context_enabled(struct intel_context *ce)
+{
+	lockdep_assert_held(&ce->guc_state.lock);
+	ce->guc_state.sched_state |= SCHED_STATE_ENABLED;
+}
+
+static inline void clr_context_enabled(struct intel_context *ce)
+{
+	lockdep_assert_held(&ce->guc_state.lock);
+	ce->guc_state.sched_state &= ~SCHED_STATE_ENABLED;
+}
+
+static inline bool context_pending_enable(struct intel_context *ce)
+{
+	return ce->guc_state.sched_state & SCHED_STATE_PENDING_ENABLE;
+}
+
+static inline void set_context_pending_enable(struct intel_context *ce)
+{
+	lockdep_assert_held(&ce->guc_state.lock);
+	ce->guc_state.sched_state |= SCHED_STATE_PENDING_ENABLE;
+}
+
+static inline void clr_context_pending_enable(struct intel_context *ce)
+{
+	lockdep_assert_held(&ce->guc_state.lock);
+	ce->guc_state.sched_state &= ~SCHED_STATE_PENDING_ENABLE;
+}
+
+static inline bool context_registered(struct intel_context *ce)
+{
+	return ce->guc_state.sched_state & SCHED_STATE_REGISTERED;
+}
+
+static inline void set_context_registered(struct intel_context *ce)
+{
+	lockdep_assert_held(&ce->guc_state.lock);
+	ce->guc_state.sched_state |= SCHED_STATE_REGISTERED;
+}
+
+static inline void clr_context_registered(struct intel_context *ce)
+{
+	lockdep_assert_held(&ce->guc_state.lock);
+	ce->guc_state.sched_state &= ~SCHED_STATE_REGISTERED;
+}
+
 static inline u32 context_blocked(struct intel_context *ce)
 {
 	return (ce->guc_state.sched_state & SCHED_STATE_BLOCKED_MASK) >>
@@ -246,7 +233,6 @@ static inline u32 context_blocked(struct intel_context *ce)
 
 static inline void incr_context_blocked(struct intel_context *ce)
 {
-	lockdep_assert_held(&ce->engine->sched_engine->lock);
 	lockdep_assert_held(&ce->guc_state.lock);
 
 	ce->guc_state.sched_state += SCHED_STATE_BLOCKED;
@@ -256,7 +242,6 @@ static inline void incr_context_blocked(struct intel_context *ce)
 
 static inline void decr_context_blocked(struct intel_context *ce)
 {
-	lockdep_assert_held(&ce->engine->sched_engine->lock);
 	lockdep_assert_held(&ce->guc_state.lock);
 
 	GEM_BUG_ON(!context_blocked(ce));	/* Underflow check */
@@ -452,6 +437,8 @@ static int guc_add_request(struct intel_guc *guc, struct i915_request *rq)
 	u32 g2h_len_dw = 0;
 	bool enabled;
 
+	lockdep_assert_held(&rq->engine->sched_engine->lock);
+
 	/*
 	 * Corner case where requests were sitting in the priority list or a
 	 * request resubmitted after the context was banned.
@@ -459,7 +446,7 @@ static int guc_add_request(struct intel_guc *guc, struct i915_request *rq)
 	if (unlikely(intel_context_is_banned(ce))) {
 		i915_request_put(i915_request_mark_eio(rq));
 		intel_engine_signal_breadcrumbs(ce->engine);
-		goto out;
+		return 0;
 	}
 
 	GEM_BUG_ON(!atomic_read(&ce->guc_id_ref));
@@ -472,9 +459,11 @@ static int guc_add_request(struct intel_guc *guc, struct i915_request *rq)
 	if (unlikely(!lrc_desc_registered(guc, ce->guc_id))) {
 		err = guc_lrc_desc_pin(ce, false);
 		if (unlikely(err))
-			goto out;
+			return err;
 	}
 
+	spin_lock(&ce->guc_state.lock);
+
 	/*
 	 * The request / context will be run on the hardware when scheduling
 	 * gets enabled in the unblock.
@@ -509,6 +498,7 @@ static int guc_add_request(struct intel_guc *guc, struct i915_request *rq)
 		trace_i915_request_guc_submit(rq);
 
 out:
+	spin_unlock(&ce->guc_state.lock);
 	return err;
 }
 
@@ -747,6 +737,7 @@ void intel_guc_submission_reset_prepare(struct intel_guc *guc)
 			wait_for_reset(guc, &guc->outstanding_submission_g2h);
 		} while (!list_empty(&guc->ct.requests.incoming));
 	}
+
 	scrub_guc_desc_for_outstanding_g2h(guc);
 }
 
@@ -1147,7 +1138,11 @@ static int steal_guc_id(struct intel_guc *guc)
 
 		list_del_init(&ce->guc_id_link);
 		guc_id = ce->guc_id;
+
+		spin_lock(&ce->guc_state.lock);
 		clr_context_registered(ce);
+		spin_unlock(&ce->guc_state.lock);
+
 		set_context_guc_id_invalid(ce);
 		return guc_id;
 	} else {
@@ -1183,6 +1178,8 @@ static int pin_guc_id(struct intel_guc *guc, struct intel_context *ce)
 try_again:
 	spin_lock_irqsave(&guc->contexts_lock, flags);
 
+	might_lock(&ce->guc_state.lock);
+
 	if (context_guc_id_invalid(ce)) {
 		ret = assign_guc_id(guc, &ce->guc_id);
 		if (ret)
@@ -1262,8 +1259,13 @@ static int register_context(struct intel_context *ce, bool loop)
 	trace_intel_context_register(ce);
 
 	ret = __guc_action_register_context(guc, ce->guc_id, offset, loop);
-	if (likely(!ret))
+	if (likely(!ret)) {
+		unsigned long flags;
+
+		spin_lock_irqsave(&ce->guc_state.lock, flags);
 		set_context_registered(ce);
+		spin_unlock_irqrestore(&ce->guc_state.lock, flags);
+	}
 
 	return ret;
 }
@@ -1537,7 +1539,6 @@ static u16 prep_context_pending_disable(struct intel_context *ce)
 static struct i915_sw_fence *guc_context_block(struct intel_context *ce)
 {
 	struct intel_guc *guc = ce_to_guc(ce);
-	struct i915_sched_engine *sched_engine = ce->engine->sched_engine;
 	unsigned long flags;
 	struct intel_runtime_pm *runtime_pm = ce->engine->uncore->rpm;
 	intel_wakeref_t wakeref;
@@ -1546,13 +1547,7 @@ static struct i915_sw_fence *guc_context_block(struct intel_context *ce)
 
 	spin_lock_irqsave(&ce->guc_state.lock, flags);
 
-	/*
-	 * Sync with submission path, increment before below changes to context
-	 * state.
-	 */
-	spin_lock(&sched_engine->lock);
 	incr_context_blocked(ce);
-	spin_unlock(&sched_engine->lock);
 
 	enabled = context_enabled(ce);
 	if (unlikely(!enabled || submission_disabled(guc))) {
@@ -1598,7 +1593,6 @@ static bool context_cant_unblock(struct intel_context *ce)
 static void guc_context_unblock(struct intel_context *ce)
 {
 	struct intel_guc *guc = ce_to_guc(ce);
-	struct i915_sched_engine *sched_engine = ce->engine->sched_engine;
 	unsigned long flags;
 	struct intel_runtime_pm *runtime_pm = ce->engine->uncore->rpm;
 	intel_wakeref_t wakeref;
@@ -1618,13 +1612,7 @@ static void guc_context_unblock(struct intel_context *ce)
 		intel_context_get(ce);
 	}
 
-	/*
-	 * Sync with submission path, decrement after above changes to context
-	 * state.
-	 */
-	spin_lock(&sched_engine->lock);
 	decr_context_blocked(ce);
-	spin_unlock(&sched_engine->lock);
 
 	spin_unlock_irqrestore(&ce->guc_state.lock, flags);
 
@@ -1730,16 +1718,6 @@ static void guc_context_sched_disable(struct intel_context *ce)
 	struct intel_runtime_pm *runtime_pm = &ce->engine->gt->i915->runtime_pm;
 	intel_wakeref_t wakeref;
 	u16 guc_id;
-	bool enabled;
-
-	if (submission_disabled(guc) || context_guc_id_invalid(ce) ||
-	    !lrc_desc_registered(guc, ce->guc_id)) {
-		clr_context_enabled(ce);
-		goto unpin;
-	}
-
-	if (!context_enabled(ce))
-		goto unpin;
 
 	spin_lock_irqsave(&ce->guc_state.lock, flags);
 
@@ -1753,10 +1731,8 @@ static void guc_context_sched_disable(struct intel_context *ce)
 	 * sleep) ensures another process doesn't pin this context and generate
 	 * a request before we set the 'context_pending_disable' flag here.
 	 */
-	enabled = context_enabled(ce);
-	if (unlikely(!enabled || submission_disabled(guc))) {
-		if (enabled)
-			clr_context_enabled(ce);
+	if (unlikely(!context_enabled(ce) || submission_disabled(guc))) {
+		clr_context_enabled(ce);
 		spin_unlock_irqrestore(&ce->guc_state.lock, flags);
 		goto unpin;
 	}
@@ -1784,7 +1760,6 @@ static inline void guc_lrc_desc_unpin(struct intel_context *ce)
 	GEM_BUG_ON(ce != __get_context(guc, ce->guc_id));
 	GEM_BUG_ON(context_enabled(ce));
 
-	clr_context_registered(ce);
 	deregister_context(ce, ce->guc_id);
 }
 
@@ -1857,8 +1832,10 @@ static void guc_context_destroy(struct kref *kref)
 	/* Seal race with Reset */
 	spin_lock_irqsave(&ce->guc_state.lock, flags);
 	disabled = submission_disabled(guc);
-	if (likely(!disabled))
+	if (likely(!disabled)) {
 		set_context_destroyed(ce);
+		clr_context_registered(ce);
+	}
 	spin_unlock_irqrestore(&ce->guc_state.lock, flags);
 	if (unlikely(disabled)) {
 		release_guc_id(guc, ce);
@@ -2724,8 +2701,7 @@ int intel_guc_sched_done_process_msg(struct intel_guc *guc,
 		     (!context_pending_enable(ce) &&
 		     !context_pending_disable(ce)))) {
 		drm_err(&guc_to_gt(guc)->i915->drm,
-			"Bad context sched_state 0x%x, 0x%x, desc_idx %u",
-			atomic_read(&ce->guc_sched_state_no_lock),
+			"Bad context sched_state 0x%x, desc_idx %u",
 			ce->guc_state.sched_state, desc_idx);
 		return -EPROTO;
 	}
@@ -2740,7 +2716,9 @@ int intel_guc_sched_done_process_msg(struct intel_guc *guc,
 		}
 #endif
 
+		spin_lock_irqsave(&ce->guc_state.lock, flags);
 		clr_context_pending_enable(ce);
+		spin_unlock_irqrestore(&ce->guc_state.lock, flags);
 	} else if (context_pending_disable(ce)) {
 		bool banned;
 
@@ -3014,9 +2992,8 @@ void intel_guc_submission_print_context_info(struct intel_guc *guc,
 			   atomic_read(&ce->pin_count));
 		drm_printf(p, "\t\tGuC ID Ref Count: %u\n",
 			   atomic_read(&ce->guc_id_ref));
-		drm_printf(p, "\t\tSchedule State: 0x%x, 0x%x\n\n",
-			   ce->guc_state.sched_state,
-			   atomic_read(&ce->guc_sched_state_no_lock));
+		drm_printf(p, "\t\tSchedule State: 0x%x\n\n",
+			   ce->guc_state.sched_state);
 
 		guc_log_context_priority(p, ce);
 	}
diff --git a/drivers/gpu/drm/i915/i915_trace.h b/drivers/gpu/drm/i915/i915_trace.h
index 237e5061381b..510168c1d703 100644
--- a/drivers/gpu/drm/i915/i915_trace.h
+++ b/drivers/gpu/drm/i915/i915_trace.h
@@ -903,7 +903,6 @@ DECLARE_EVENT_CLASS(intel_context,
 			     __field(u32, guc_id)
 			     __field(int, pin_count)
 			     __field(u32, sched_state)
-			     __field(u32, guc_sched_state_no_lock)
 			     __field(u8, guc_prio)
 			     ),
 
@@ -911,15 +910,12 @@ DECLARE_EVENT_CLASS(intel_context,
 			   __entry->guc_id = ce->guc_id;
 			   __entry->pin_count = atomic_read(&ce->pin_count);
 			   __entry->sched_state = ce->guc_state.sched_state;
-			   __entry->guc_sched_state_no_lock =
-			   atomic_read(&ce->guc_sched_state_no_lock);
 			   __entry->guc_prio = ce->guc_prio;
 			   ),
 
-		    TP_printk("guc_id=%d, pin_count=%d sched_state=0x%x,0x%x, guc_prio=%u",
+		    TP_printk("guc_id=%d, pin_count=%d sched_state=0x%x, guc_prio=%u",
 			      __entry->guc_id, __entry->pin_count,
 			      __entry->sched_state,
-			      __entry->guc_sched_state_no_lock,
 			      __entry->guc_prio)
 );
 
-- 
2.32.0

[PATCH 18/23] drm/i915/guc: Proper xarray usage for contexts_lookup

[Matthew Brost]

Lock the xarray and take ref to the context if needed.

v2:
 (Checkpatch)
  - Add new line after declaration
 (Daniel Vetter)
  - Correct put / get accounting in xa_for_loops
v3:
 (Checkpatch)
  - Extra new line

Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
---
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 102 +++++++++++++++---
 1 file changed, 87 insertions(+), 15 deletions(-)

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 383dc1017004..4814acf1c2ac 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -608,8 +608,18 @@ static void scrub_guc_desc_for_outstanding_g2h(struct intel_guc *guc)
 	unsigned long index, flags;
 	bool pending_disable, pending_enable, deregister, destroyed, banned;
 
+	xa_lock_irqsave(&guc->context_lookup, flags);
 	xa_for_each(&guc->context_lookup, index, ce) {
-		spin_lock_irqsave(&ce->guc_state.lock, flags);
+		/*
+		 * Corner case where the ref count on the object is zero but and
+		 * deregister G2H was lost. In this case we don't touch the ref
+		 * count and finish the destroy of the context.
+		 */
+		bool do_put = kref_get_unless_zero(&ce->ref);
+
+		xa_unlock(&guc->context_lookup);
+
+		spin_lock(&ce->guc_state.lock);
 
 		/*
 		 * Once we are at this point submission_disabled() is guaranteed
@@ -625,7 +635,9 @@ static void scrub_guc_desc_for_outstanding_g2h(struct intel_guc *guc)
 		banned = context_banned(ce);
 		init_sched_state(ce);
 
-		spin_unlock_irqrestore(&ce->guc_state.lock, flags);
+		spin_unlock(&ce->guc_state.lock);
+
+		GEM_BUG_ON(!do_put && !destroyed);
 
 		if (pending_enable || destroyed || deregister) {
 			decr_outstanding_submission_g2h(guc);
@@ -648,13 +660,19 @@ static void scrub_guc_desc_for_outstanding_g2h(struct intel_guc *guc)
 			}
 			intel_context_sched_disable_unpin(ce);
 			decr_outstanding_submission_g2h(guc);
-			spin_lock_irqsave(&ce->guc_state.lock, flags);
+
+			spin_lock(&ce->guc_state.lock);
 			guc_blocked_fence_complete(ce);
-			spin_unlock_irqrestore(&ce->guc_state.lock, flags);
+			spin_unlock(&ce->guc_state.lock);
 
 			intel_context_put(ce);
 		}
+
+		if (do_put)
+			intel_context_put(ce);
+		xa_lock(&guc->context_lookup);
 	}
+	xa_unlock_irqrestore(&guc->context_lookup, flags);
 }
 
 static inline bool
@@ -890,16 +908,29 @@ void intel_guc_submission_reset(struct intel_guc *guc, bool stalled)
 {
 	struct intel_context *ce;
 	unsigned long index;
+	unsigned long flags;
 
 	if (unlikely(!guc_submission_initialized(guc))) {
 		/* Reset called during driver load? GuC not yet initialised! */
 		return;
 	}
 
-	xa_for_each(&guc->context_lookup, index, ce)
+	xa_lock_irqsave(&guc->context_lookup, flags);
+	xa_for_each(&guc->context_lookup, index, ce) {
+		if (!kref_get_unless_zero(&ce->ref))
+			continue;
+
+		xa_unlock(&guc->context_lookup);
+
 		if (intel_context_is_pinned(ce))
 			__guc_reset_context(ce, stalled);
 
+		intel_context_put(ce);
+
+		xa_lock(&guc->context_lookup);
+	}
+	xa_unlock_irqrestore(&guc->context_lookup, flags);
+
 	/* GuC is blown away, drop all references to contexts */
 	xa_destroy(&guc->context_lookup);
 }
@@ -974,11 +1005,24 @@ void intel_guc_submission_cancel_requests(struct intel_guc *guc)
 {
 	struct intel_context *ce;
 	unsigned long index;
+	unsigned long flags;
+
+	xa_lock_irqsave(&guc->context_lookup, flags);
+	xa_for_each(&guc->context_lookup, index, ce) {
+		if (!kref_get_unless_zero(&ce->ref))
+			continue;
+
+		xa_unlock(&guc->context_lookup);
 
-	xa_for_each(&guc->context_lookup, index, ce)
 		if (intel_context_is_pinned(ce))
 			guc_cancel_context_requests(ce);
 
+		intel_context_put(ce);
+
+		xa_lock(&guc->context_lookup);
+	}
+	xa_unlock_irqrestore(&guc->context_lookup, flags);
+
 	guc_cancel_sched_engine_requests(guc->sched_engine);
 
 	/* GuC is blown away, drop all references to contexts */
@@ -2866,21 +2910,28 @@ void intel_guc_find_hung_context(struct intel_engine_cs *engine)
 	struct intel_context *ce;
 	struct i915_request *rq;
 	unsigned long index;
+	unsigned long flags;
 
 	/* Reset called during driver load? GuC not yet initialised! */
 	if (unlikely(!guc_submission_initialized(guc)))
 		return;
 
+	xa_lock_irqsave(&guc->context_lookup, flags);
 	xa_for_each(&guc->context_lookup, index, ce) {
-		if (!intel_context_is_pinned(ce))
+		if (!kref_get_unless_zero(&ce->ref))
 			continue;
 
+		xa_unlock(&guc->context_lookup);
+
+		if (!intel_context_is_pinned(ce))
+			goto next;
+
 		if (intel_engine_is_virtual(ce->engine)) {
 			if (!(ce->engine->mask & engine->mask))
-				continue;
+				goto next;
 		} else {
 			if (ce->engine != engine)
-				continue;
+				goto next;
 		}
 
 		list_for_each_entry(rq, &ce->guc_active.requests, sched.link) {
@@ -2890,9 +2941,16 @@ void intel_guc_find_hung_context(struct intel_engine_cs *engine)
 			intel_engine_set_hung_context(engine, ce);
 
 			/* Can only cope with one hang at a time... */
-			return;
+			intel_context_put(ce);
+			xa_lock(&guc->context_lookup);
+			goto done;
 		}
+next:
+		intel_context_put(ce);
+		xa_lock(&guc->context_lookup);
 	}
+done:
+	xa_unlock_irqrestore(&guc->context_lookup, flags);
 }
 
 void intel_guc_dump_active_requests(struct intel_engine_cs *engine,
@@ -2908,23 +2966,34 @@ void intel_guc_dump_active_requests(struct intel_engine_cs *engine,
 	if (unlikely(!guc_submission_initialized(guc)))
 		return;
 
+	xa_lock_irqsave(&guc->context_lookup, flags);
 	xa_for_each(&guc->context_lookup, index, ce) {
-		if (!intel_context_is_pinned(ce))
+		if (!kref_get_unless_zero(&ce->ref))
 			continue;
 
+		xa_unlock(&guc->context_lookup);
+
+		if (!intel_context_is_pinned(ce))
+			goto next;
+
 		if (intel_engine_is_virtual(ce->engine)) {
 			if (!(ce->engine->mask & engine->mask))
-				continue;
+				goto next;
 		} else {
 			if (ce->engine != engine)
-				continue;
+				goto next;
 		}
 
-		spin_lock_irqsave(&ce->guc_active.lock, flags);
+		spin_lock(&ce->guc_active.lock);
 		intel_engine_dump_active_requests(&ce->guc_active.requests,
 						  hung_rq, m);
-		spin_unlock_irqrestore(&ce->guc_active.lock, flags);
+		spin_unlock(&ce->guc_active.lock);
+
+next:
+		intel_context_put(ce);
+		xa_lock(&guc->context_lookup);
 	}
+	xa_unlock_irqrestore(&guc->context_lookup, flags);
 }
 
 void intel_guc_submission_print_info(struct intel_guc *guc,
@@ -2978,7 +3047,9 @@ void intel_guc_submission_print_context_info(struct intel_guc *guc,
 {
 	struct intel_context *ce;
 	unsigned long index;
+	unsigned long flags;
 
+	xa_lock_irqsave(&guc->context_lookup, flags);
 	xa_for_each(&guc->context_lookup, index, ce) {
 		drm_printf(p, "GuC lrc descriptor %u:\n", ce->guc_id);
 		drm_printf(p, "\tHW Context Desc: 0x%08x\n", ce->lrc.lrca);
@@ -2997,6 +3068,7 @@ void intel_guc_submission_print_context_info(struct intel_guc *guc,
 
 		guc_log_context_priority(p, ce);
 	}
+	xa_unlock_irqrestore(&guc->context_lookup, flags);
 }
 
 static struct intel_context *
-- 
2.32.0

[Intel-gfx] [PATCH 18/23] drm/i915/guc: Proper xarray usage for contexts_lookup

[Matthew Brost]

Lock the xarray and take ref to the context if needed.

v2:
 (Checkpatch)
  - Add new line after declaration
 (Daniel Vetter)
  - Correct put / get accounting in xa_for_loops
v3:
 (Checkpatch)
  - Extra new line

Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
---
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 102 +++++++++++++++---
 1 file changed, 87 insertions(+), 15 deletions(-)

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 383dc1017004..4814acf1c2ac 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -608,8 +608,18 @@ static void scrub_guc_desc_for_outstanding_g2h(struct intel_guc *guc)
 	unsigned long index, flags;
 	bool pending_disable, pending_enable, deregister, destroyed, banned;
 
+	xa_lock_irqsave(&guc->context_lookup, flags);
 	xa_for_each(&guc->context_lookup, index, ce) {
-		spin_lock_irqsave(&ce->guc_state.lock, flags);
+		/*
+		 * Corner case where the ref count on the object is zero but and
+		 * deregister G2H was lost. In this case we don't touch the ref
+		 * count and finish the destroy of the context.
+		 */
+		bool do_put = kref_get_unless_zero(&ce->ref);
+
+		xa_unlock(&guc->context_lookup);
+
+		spin_lock(&ce->guc_state.lock);
 
 		/*
 		 * Once we are at this point submission_disabled() is guaranteed
@@ -625,7 +635,9 @@ static void scrub_guc_desc_for_outstanding_g2h(struct intel_guc *guc)
 		banned = context_banned(ce);
 		init_sched_state(ce);
 
-		spin_unlock_irqrestore(&ce->guc_state.lock, flags);
+		spin_unlock(&ce->guc_state.lock);
+
+		GEM_BUG_ON(!do_put && !destroyed);
 
 		if (pending_enable || destroyed || deregister) {
 			decr_outstanding_submission_g2h(guc);
@@ -648,13 +660,19 @@ static void scrub_guc_desc_for_outstanding_g2h(struct intel_guc *guc)
 			}
 			intel_context_sched_disable_unpin(ce);
 			decr_outstanding_submission_g2h(guc);
-			spin_lock_irqsave(&ce->guc_state.lock, flags);
+
+			spin_lock(&ce->guc_state.lock);
 			guc_blocked_fence_complete(ce);
-			spin_unlock_irqrestore(&ce->guc_state.lock, flags);
+			spin_unlock(&ce->guc_state.lock);
 
 			intel_context_put(ce);
 		}
+
+		if (do_put)
+			intel_context_put(ce);
+		xa_lock(&guc->context_lookup);
 	}
+	xa_unlock_irqrestore(&guc->context_lookup, flags);
 }
 
 static inline bool
@@ -890,16 +908,29 @@ void intel_guc_submission_reset(struct intel_guc *guc, bool stalled)
 {
 	struct intel_context *ce;
 	unsigned long index;
+	unsigned long flags;
 
 	if (unlikely(!guc_submission_initialized(guc))) {
 		/* Reset called during driver load? GuC not yet initialised! */
 		return;
 	}
 
-	xa_for_each(&guc->context_lookup, index, ce)
+	xa_lock_irqsave(&guc->context_lookup, flags);
+	xa_for_each(&guc->context_lookup, index, ce) {
+		if (!kref_get_unless_zero(&ce->ref))
+			continue;
+
+		xa_unlock(&guc->context_lookup);
+
 		if (intel_context_is_pinned(ce))
 			__guc_reset_context(ce, stalled);
 
+		intel_context_put(ce);
+
+		xa_lock(&guc->context_lookup);
+	}
+	xa_unlock_irqrestore(&guc->context_lookup, flags);
+
 	/* GuC is blown away, drop all references to contexts */
 	xa_destroy(&guc->context_lookup);
 }
@@ -974,11 +1005,24 @@ void intel_guc_submission_cancel_requests(struct intel_guc *guc)
 {
 	struct intel_context *ce;
 	unsigned long index;
+	unsigned long flags;
+
+	xa_lock_irqsave(&guc->context_lookup, flags);
+	xa_for_each(&guc->context_lookup, index, ce) {
+		if (!kref_get_unless_zero(&ce->ref))
+			continue;
+
+		xa_unlock(&guc->context_lookup);
 
-	xa_for_each(&guc->context_lookup, index, ce)
 		if (intel_context_is_pinned(ce))
 			guc_cancel_context_requests(ce);
 
+		intel_context_put(ce);
+
+		xa_lock(&guc->context_lookup);
+	}
+	xa_unlock_irqrestore(&guc->context_lookup, flags);
+
 	guc_cancel_sched_engine_requests(guc->sched_engine);
 
 	/* GuC is blown away, drop all references to contexts */
@@ -2866,21 +2910,28 @@ void intel_guc_find_hung_context(struct intel_engine_cs *engine)
 	struct intel_context *ce;
 	struct i915_request *rq;
 	unsigned long index;
+	unsigned long flags;
 
 	/* Reset called during driver load? GuC not yet initialised! */
 	if (unlikely(!guc_submission_initialized(guc)))
 		return;
 
+	xa_lock_irqsave(&guc->context_lookup, flags);
 	xa_for_each(&guc->context_lookup, index, ce) {
-		if (!intel_context_is_pinned(ce))
+		if (!kref_get_unless_zero(&ce->ref))
 			continue;
 
+		xa_unlock(&guc->context_lookup);
+
+		if (!intel_context_is_pinned(ce))
+			goto next;
+
 		if (intel_engine_is_virtual(ce->engine)) {
 			if (!(ce->engine->mask & engine->mask))
-				continue;
+				goto next;
 		} else {
 			if (ce->engine != engine)
-				continue;
+				goto next;
 		}
 
 		list_for_each_entry(rq, &ce->guc_active.requests, sched.link) {
@@ -2890,9 +2941,16 @@ void intel_guc_find_hung_context(struct intel_engine_cs *engine)
 			intel_engine_set_hung_context(engine, ce);
 
 			/* Can only cope with one hang at a time... */
-			return;
+			intel_context_put(ce);
+			xa_lock(&guc->context_lookup);
+			goto done;
 		}
+next:
+		intel_context_put(ce);
+		xa_lock(&guc->context_lookup);
 	}
+done:
+	xa_unlock_irqrestore(&guc->context_lookup, flags);
 }
 
 void intel_guc_dump_active_requests(struct intel_engine_cs *engine,
@@ -2908,23 +2966,34 @@ void intel_guc_dump_active_requests(struct intel_engine_cs *engine,
 	if (unlikely(!guc_submission_initialized(guc)))
 		return;
 
+	xa_lock_irqsave(&guc->context_lookup, flags);
 	xa_for_each(&guc->context_lookup, index, ce) {
-		if (!intel_context_is_pinned(ce))
+		if (!kref_get_unless_zero(&ce->ref))
 			continue;
 
+		xa_unlock(&guc->context_lookup);
+
+		if (!intel_context_is_pinned(ce))
+			goto next;
+
 		if (intel_engine_is_virtual(ce->engine)) {
 			if (!(ce->engine->mask & engine->mask))
-				continue;
+				goto next;
 		} else {
 			if (ce->engine != engine)
-				continue;
+				goto next;
 		}
 
-		spin_lock_irqsave(&ce->guc_active.lock, flags);
+		spin_lock(&ce->guc_active.lock);
 		intel_engine_dump_active_requests(&ce->guc_active.requests,
 						  hung_rq, m);
-		spin_unlock_irqrestore(&ce->guc_active.lock, flags);
+		spin_unlock(&ce->guc_active.lock);
+
+next:
+		intel_context_put(ce);
+		xa_lock(&guc->context_lookup);
 	}
+	xa_unlock_irqrestore(&guc->context_lookup, flags);
 }
 
 void intel_guc_submission_print_info(struct intel_guc *guc,
@@ -2978,7 +3047,9 @@ void intel_guc_submission_print_context_info(struct intel_guc *guc,
 {
 	struct intel_context *ce;
 	unsigned long index;
+	unsigned long flags;
 
+	xa_lock_irqsave(&guc->context_lookup, flags);
 	xa_for_each(&guc->context_lookup, index, ce) {
 		drm_printf(p, "GuC lrc descriptor %u:\n", ce->guc_id);
 		drm_printf(p, "\tHW Context Desc: 0x%08x\n", ce->lrc.lrca);
@@ -2997,6 +3068,7 @@ void intel_guc_submission_print_context_info(struct intel_guc *guc,
 
 		guc_log_context_priority(p, ce);
 	}
+	xa_unlock_irqrestore(&guc->context_lookup, flags);
 }
 
 static struct intel_context *
-- 
2.32.0

[PATCH 19/23] drm/i915/guc: Drop pin count check trick between sched_disable and re-pin

[Matthew Brost]

Drop pin count check trick between a sched_disable and re-pin, now rely
on the lock and counter of the number of committed requests to determine
if scheduling should be disabled on the context.

Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
---
 drivers/gpu/drm/i915/gt/intel_context_types.h |  2 +
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 53 +++++++++++--------
 2 files changed, 34 insertions(+), 21 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_context_types.h b/drivers/gpu/drm/i915/gt/intel_context_types.h
index d2f798ef678c..3a5d98e908f4 100644
--- a/drivers/gpu/drm/i915/gt/intel_context_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_context_types.h
@@ -169,6 +169,8 @@ struct intel_context {
 		struct list_head fences;
 		/* GuC context blocked fence */
 		struct i915_sw_fence blocked;
+		/* GuC committed requests */
+		int number_committed_requests;
 	} guc_state;
 
 	struct {
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 4814acf1c2ac..31f911ae14fa 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -249,6 +249,25 @@ static inline void decr_context_blocked(struct intel_context *ce)
 	ce->guc_state.sched_state -= SCHED_STATE_BLOCKED;
 }
 
+static inline bool context_has_committed_requests(struct intel_context *ce)
+{
+	return !!ce->guc_state.number_committed_requests;
+}
+
+static inline void incr_context_committed_requests(struct intel_context *ce)
+{
+	lockdep_assert_held(&ce->guc_state.lock);
+	++ce->guc_state.number_committed_requests;
+	GEM_BUG_ON(ce->guc_state.number_committed_requests < 0);
+}
+
+static inline void decr_context_committed_requests(struct intel_context *ce)
+{
+	lockdep_assert_held(&ce->guc_state.lock);
+	--ce->guc_state.number_committed_requests;
+	GEM_BUG_ON(ce->guc_state.number_committed_requests < 0);
+}
+
 static inline bool context_guc_id_invalid(struct intel_context *ce)
 {
 	return ce->guc_id == GUC_INVALID_LRC_ID;
@@ -1766,24 +1785,18 @@ static void guc_context_sched_disable(struct intel_context *ce)
 	spin_lock_irqsave(&ce->guc_state.lock, flags);
 
 	/*
-	 * We have to check if the context has been disabled by another thread.
-	 * We also have to check if the context has been pinned again as another
-	 * pin operation is allowed to pass this function. Checking the pin
-	 * count, within ce->guc_state.lock, synchronizes this function with
-	 * guc_request_alloc ensuring a request doesn't slip through the
-	 * 'context_pending_disable' fence. Checking within the spin lock (can't
-	 * sleep) ensures another process doesn't pin this context and generate
-	 * a request before we set the 'context_pending_disable' flag here.
+	 * We have to check if the context has been disabled by another thread,
+	 * check if submssion has been disabled to seal a race with reset and
+	 * finally check if any more requests have been committed to the
+	 * context ensursing that a request doesn't slip through the
+	 * 'context_pending_disable' fence.
 	 */
-	if (unlikely(!context_enabled(ce) || submission_disabled(guc))) {
+	if (unlikely(!context_enabled(ce) || submission_disabled(guc) ||
+		     context_has_committed_requests(ce))) {
 		clr_context_enabled(ce);
 		spin_unlock_irqrestore(&ce->guc_state.lock, flags);
 		goto unpin;
 	}
-	if (unlikely(atomic_add_unless(&ce->pin_count, -2, 2))) {
-		spin_unlock_irqrestore(&ce->guc_state.lock, flags);
-		return;
-	}
 	guc_id = prep_context_pending_disable(ce);
 
 	spin_unlock_irqrestore(&ce->guc_state.lock, flags);
@@ -1813,6 +1826,7 @@ static void __guc_context_destroy(struct intel_context *ce)
 		   ce->guc_prio_count[GUC_CLIENT_PRIORITY_HIGH] ||
 		   ce->guc_prio_count[GUC_CLIENT_PRIORITY_KMD_NORMAL] ||
 		   ce->guc_prio_count[GUC_CLIENT_PRIORITY_NORMAL]);
+	GEM_BUG_ON(ce->guc_state.number_committed_requests);
 
 	lrc_fini(ce);
 	intel_context_fini(ce);
@@ -2043,6 +2057,10 @@ static void remove_from_context(struct i915_request *rq)
 
 	spin_unlock_irq(&ce->guc_active.lock);
 
+	spin_lock_irq(&ce->guc_state.lock);
+	decr_context_committed_requests(ce);
+	spin_unlock_irq(&ce->guc_state.lock);
+
 	atomic_dec(&ce->guc_id_ref);
 	i915_request_notify_execute_cb_imm(rq);
 }
@@ -2193,15 +2211,7 @@ static int guc_request_alloc(struct i915_request *rq)
 	 * schedule enable or context registration if either G2H is pending
 	 * respectfully. Once a G2H returns, the fence is released that is
 	 * blocking these requests (see guc_signal_context_fence).
-	 *
-	 * We can safely check the below fields outside of the lock as it isn't
-	 * possible for these fields to transition from being clear to set but
-	 * converse is possible, hence the need for the check within the lock.
 	 */
-	if (likely(!context_wait_for_deregister_to_register(ce) &&
-		   !context_pending_disable(ce)))
-		return 0;
-
 	spin_lock_irqsave(&ce->guc_state.lock, flags);
 	if (context_wait_for_deregister_to_register(ce) ||
 	    context_pending_disable(ce)) {
@@ -2210,6 +2220,7 @@ static int guc_request_alloc(struct i915_request *rq)
 
 		list_add_tail(&rq->guc_fence_link, &ce->guc_state.fences);
 	}
+	incr_context_committed_requests(ce);
 	spin_unlock_irqrestore(&ce->guc_state.lock, flags);
 
 	return 0;
-- 
2.32.0

[Intel-gfx] [PATCH 19/23] drm/i915/guc: Drop pin count check trick between sched_disable and re-pin

[Matthew Brost]

Drop pin count check trick between a sched_disable and re-pin, now rely
on the lock and counter of the number of committed requests to determine
if scheduling should be disabled on the context.

Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
---
 drivers/gpu/drm/i915/gt/intel_context_types.h |  2 +
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 53 +++++++++++--------
 2 files changed, 34 insertions(+), 21 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_context_types.h b/drivers/gpu/drm/i915/gt/intel_context_types.h
index d2f798ef678c..3a5d98e908f4 100644
--- a/drivers/gpu/drm/i915/gt/intel_context_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_context_types.h
@@ -169,6 +169,8 @@ struct intel_context {
 		struct list_head fences;
 		/* GuC context blocked fence */
 		struct i915_sw_fence blocked;
+		/* GuC committed requests */
+		int number_committed_requests;
 	} guc_state;
 
 	struct {
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 4814acf1c2ac..31f911ae14fa 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -249,6 +249,25 @@ static inline void decr_context_blocked(struct intel_context *ce)
 	ce->guc_state.sched_state -= SCHED_STATE_BLOCKED;
 }
 
+static inline bool context_has_committed_requests(struct intel_context *ce)
+{
+	return !!ce->guc_state.number_committed_requests;
+}
+
+static inline void incr_context_committed_requests(struct intel_context *ce)
+{
+	lockdep_assert_held(&ce->guc_state.lock);
+	++ce->guc_state.number_committed_requests;
+	GEM_BUG_ON(ce->guc_state.number_committed_requests < 0);
+}
+
+static inline void decr_context_committed_requests(struct intel_context *ce)
+{
+	lockdep_assert_held(&ce->guc_state.lock);
+	--ce->guc_state.number_committed_requests;
+	GEM_BUG_ON(ce->guc_state.number_committed_requests < 0);
+}
+
 static inline bool context_guc_id_invalid(struct intel_context *ce)
 {
 	return ce->guc_id == GUC_INVALID_LRC_ID;
@@ -1766,24 +1785,18 @@ static void guc_context_sched_disable(struct intel_context *ce)
 	spin_lock_irqsave(&ce->guc_state.lock, flags);
 
 	/*
-	 * We have to check if the context has been disabled by another thread.
-	 * We also have to check if the context has been pinned again as another
-	 * pin operation is allowed to pass this function. Checking the pin
-	 * count, within ce->guc_state.lock, synchronizes this function with
-	 * guc_request_alloc ensuring a request doesn't slip through the
-	 * 'context_pending_disable' fence. Checking within the spin lock (can't
-	 * sleep) ensures another process doesn't pin this context and generate
-	 * a request before we set the 'context_pending_disable' flag here.
+	 * We have to check if the context has been disabled by another thread,
+	 * check if submssion has been disabled to seal a race with reset and
+	 * finally check if any more requests have been committed to the
+	 * context ensursing that a request doesn't slip through the
+	 * 'context_pending_disable' fence.
 	 */
-	if (unlikely(!context_enabled(ce) || submission_disabled(guc))) {
+	if (unlikely(!context_enabled(ce) || submission_disabled(guc) ||
+		     context_has_committed_requests(ce))) {
 		clr_context_enabled(ce);
 		spin_unlock_irqrestore(&ce->guc_state.lock, flags);
 		goto unpin;
 	}
-	if (unlikely(atomic_add_unless(&ce->pin_count, -2, 2))) {
-		spin_unlock_irqrestore(&ce->guc_state.lock, flags);
-		return;
-	}
 	guc_id = prep_context_pending_disable(ce);
 
 	spin_unlock_irqrestore(&ce->guc_state.lock, flags);
@@ -1813,6 +1826,7 @@ static void __guc_context_destroy(struct intel_context *ce)
 		   ce->guc_prio_count[GUC_CLIENT_PRIORITY_HIGH] ||
 		   ce->guc_prio_count[GUC_CLIENT_PRIORITY_KMD_NORMAL] ||
 		   ce->guc_prio_count[GUC_CLIENT_PRIORITY_NORMAL]);
+	GEM_BUG_ON(ce->guc_state.number_committed_requests);
 
 	lrc_fini(ce);
 	intel_context_fini(ce);
@@ -2043,6 +2057,10 @@ static void remove_from_context(struct i915_request *rq)
 
 	spin_unlock_irq(&ce->guc_active.lock);
 
+	spin_lock_irq(&ce->guc_state.lock);
+	decr_context_committed_requests(ce);
+	spin_unlock_irq(&ce->guc_state.lock);
+
 	atomic_dec(&ce->guc_id_ref);
 	i915_request_notify_execute_cb_imm(rq);
 }
@@ -2193,15 +2211,7 @@ static int guc_request_alloc(struct i915_request *rq)
 	 * schedule enable or context registration if either G2H is pending
 	 * respectfully. Once a G2H returns, the fence is released that is
 	 * blocking these requests (see guc_signal_context_fence).
-	 *
-	 * We can safely check the below fields outside of the lock as it isn't
-	 * possible for these fields to transition from being clear to set but
-	 * converse is possible, hence the need for the check within the lock.
 	 */
-	if (likely(!context_wait_for_deregister_to_register(ce) &&
-		   !context_pending_disable(ce)))
-		return 0;
-
 	spin_lock_irqsave(&ce->guc_state.lock, flags);
 	if (context_wait_for_deregister_to_register(ce) ||
 	    context_pending_disable(ce)) {
@@ -2210,6 +2220,7 @@ static int guc_request_alloc(struct i915_request *rq)
 
 		list_add_tail(&rq->guc_fence_link, &ce->guc_state.fences);
 	}
+	incr_context_committed_requests(ce);
 	spin_unlock_irqrestore(&ce->guc_state.lock, flags);
 
 	return 0;
-- 
2.32.0

[PATCH 20/23] drm/i915/guc: Move GuC priority fields in context under guc_active

[Matthew Brost]

Move GuC management fields in context under guc_active struct as this is
where the lock that protects theses fields lives. Also only set guc_prio
field once during context init.

v2:
 (Daniele)
  - set CONTEXT_SET_INIT

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
---
 drivers/gpu/drm/i915/gt/intel_context_types.h | 12 ++--
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 69 +++++++++++--------
 drivers/gpu/drm/i915/i915_trace.h             |  2 +-
 3 files changed, 46 insertions(+), 37 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_context_types.h b/drivers/gpu/drm/i915/gt/intel_context_types.h
index 3a5d98e908f4..b56960a781da 100644
--- a/drivers/gpu/drm/i915/gt/intel_context_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_context_types.h
@@ -112,6 +112,7 @@ struct intel_context {
 #define CONTEXT_FORCE_SINGLE_SUBMISSION	7
 #define CONTEXT_NOPREEMPT		8
 #define CONTEXT_LRCA_DIRTY		9
+#define CONTEXT_GUC_INIT		10
 
 	struct {
 		u64 timeout_us;
@@ -178,6 +179,11 @@ struct intel_context {
 		spinlock_t lock;
 		/** requests: active requests on this context */
 		struct list_head requests;
+		/*
+		 * GuC priority management
+		 */
+		u8 prio;
+		u32 prio_count[GUC_CLIENT_PRIORITY_NUM];
 	} guc_active;
 
 	/* GuC LRC descriptor ID */
@@ -191,12 +197,6 @@ struct intel_context {
 	 */
 	struct list_head guc_id_link;
 
-	/*
-	 * GuC priority management
-	 */
-	u8 guc_prio;
-	u32 guc_prio_count[GUC_CLIENT_PRIORITY_NUM];
-
 #ifdef CONFIG_DRM_I915_SELFTEST
 	/**
 	 * @drop_schedule_enable: Force drop of schedule enable G2H for selftest
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 31f911ae14fa..7e9ee7d5aaab 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -1385,8 +1385,6 @@ static void guc_context_policy_init(struct intel_engine_cs *engine,
 	desc->preemption_timeout = engine->props.preempt_timeout_ms * 1000;
 }
 
-static inline u8 map_i915_prio_to_guc_prio(int prio);
-
 static int guc_lrc_desc_pin(struct intel_context *ce, bool loop)
 {
 	struct intel_engine_cs *engine = ce->engine;
@@ -1394,8 +1392,6 @@ static int guc_lrc_desc_pin(struct intel_context *ce, bool loop)
 	struct intel_guc *guc = &engine->gt->uc.guc;
 	u32 desc_idx = ce->guc_id;
 	struct guc_lrc_desc *desc;
-	const struct i915_gem_context *ctx;
-	int prio = I915_CONTEXT_DEFAULT_PRIORITY;
 	bool context_registered;
 	intel_wakeref_t wakeref;
 	int ret = 0;
@@ -1412,12 +1408,6 @@ static int guc_lrc_desc_pin(struct intel_context *ce, bool loop)
 
 	context_registered = lrc_desc_registered(guc, desc_idx);
 
-	rcu_read_lock();
-	ctx = rcu_dereference(ce->gem_context);
-	if (ctx)
-		prio = ctx->sched.priority;
-	rcu_read_unlock();
-
 	reset_lrc_desc(guc, desc_idx);
 	set_lrc_desc_registered(guc, desc_idx, ce);
 
@@ -1426,8 +1416,7 @@ static int guc_lrc_desc_pin(struct intel_context *ce, bool loop)
 	desc->engine_submit_mask = adjust_engine_mask(engine->class,
 						      engine->mask);
 	desc->hw_context_desc = ce->lrc.lrca;
-	ce->guc_prio = map_i915_prio_to_guc_prio(prio);
-	desc->priority = ce->guc_prio;
+	desc->priority = ce->guc_active.prio;
 	desc->context_flags = CONTEXT_REGISTRATION_FLAG_KMD;
 	guc_context_policy_init(engine, desc);
 
@@ -1822,10 +1811,10 @@ static inline void guc_lrc_desc_unpin(struct intel_context *ce)
 
 static void __guc_context_destroy(struct intel_context *ce)
 {
-	GEM_BUG_ON(ce->guc_prio_count[GUC_CLIENT_PRIORITY_KMD_HIGH] ||
-		   ce->guc_prio_count[GUC_CLIENT_PRIORITY_HIGH] ||
-		   ce->guc_prio_count[GUC_CLIENT_PRIORITY_KMD_NORMAL] ||
-		   ce->guc_prio_count[GUC_CLIENT_PRIORITY_NORMAL]);
+	GEM_BUG_ON(ce->guc_active.prio_count[GUC_CLIENT_PRIORITY_KMD_HIGH] ||
+		   ce->guc_active.prio_count[GUC_CLIENT_PRIORITY_HIGH] ||
+		   ce->guc_active.prio_count[GUC_CLIENT_PRIORITY_KMD_NORMAL] ||
+		   ce->guc_active.prio_count[GUC_CLIENT_PRIORITY_NORMAL]);
 	GEM_BUG_ON(ce->guc_state.number_committed_requests);
 
 	lrc_fini(ce);
@@ -1935,14 +1924,17 @@ static void guc_context_set_prio(struct intel_guc *guc,
 
 	GEM_BUG_ON(prio < GUC_CLIENT_PRIORITY_KMD_HIGH ||
 		   prio > GUC_CLIENT_PRIORITY_NORMAL);
+	lockdep_assert_held(&ce->guc_active.lock);
 
-	if (ce->guc_prio == prio || submission_disabled(guc) ||
-	    !context_registered(ce))
+	if (ce->guc_active.prio == prio || submission_disabled(guc) ||
+	    !context_registered(ce)) {
+		ce->guc_active.prio = prio;
 		return;
+	}
 
 	guc_submission_send_busy_loop(guc, action, ARRAY_SIZE(action), 0, true);
 
-	ce->guc_prio = prio;
+	ce->guc_active.prio = prio;
 	trace_intel_context_set_prio(ce);
 }
 
@@ -1962,24 +1954,24 @@ static inline void add_context_inflight_prio(struct intel_context *ce,
 					     u8 guc_prio)
 {
 	lockdep_assert_held(&ce->guc_active.lock);
-	GEM_BUG_ON(guc_prio >= ARRAY_SIZE(ce->guc_prio_count));
+	GEM_BUG_ON(guc_prio >= ARRAY_SIZE(ce->guc_active.prio_count));
 
-	++ce->guc_prio_count[guc_prio];
+	++ce->guc_active.prio_count[guc_prio];
 
 	/* Overflow protection */
-	GEM_WARN_ON(!ce->guc_prio_count[guc_prio]);
+	GEM_WARN_ON(!ce->guc_active.prio_count[guc_prio]);
 }
 
 static inline void sub_context_inflight_prio(struct intel_context *ce,
 					     u8 guc_prio)
 {
 	lockdep_assert_held(&ce->guc_active.lock);
-	GEM_BUG_ON(guc_prio >= ARRAY_SIZE(ce->guc_prio_count));
+	GEM_BUG_ON(guc_prio >= ARRAY_SIZE(ce->guc_active.prio_count));
 
 	/* Underflow protection */
-	GEM_WARN_ON(!ce->guc_prio_count[guc_prio]);
+	GEM_WARN_ON(!ce->guc_active.prio_count[guc_prio]);
 
-	--ce->guc_prio_count[guc_prio];
+	--ce->guc_active.prio_count[guc_prio];
 }
 
 static inline void update_context_prio(struct intel_context *ce)
@@ -1992,8 +1984,8 @@ static inline void update_context_prio(struct intel_context *ce)
 
 	lockdep_assert_held(&ce->guc_active.lock);
 
-	for (i = 0; i < ARRAY_SIZE(ce->guc_prio_count); ++i) {
-		if (ce->guc_prio_count[i]) {
+	for (i = 0; i < ARRAY_SIZE(ce->guc_active.prio_count); ++i) {
+		if (ce->guc_active.prio_count[i]) {
 			guc_context_set_prio(guc, ce, i);
 			break;
 		}
@@ -2135,6 +2127,21 @@ static bool context_needs_register(struct intel_context *ce, bool new_guc_id)
 		!submission_disabled(ce_to_guc(ce));
 }
 
+static void guc_context_init(struct intel_context *ce)
+{
+	const struct i915_gem_context *ctx;
+	int prio = I915_CONTEXT_DEFAULT_PRIORITY;
+
+	rcu_read_lock();
+	ctx = rcu_dereference(ce->gem_context);
+	if (ctx)
+		prio = ctx->sched.priority;
+	rcu_read_unlock();
+
+	ce->guc_active.prio = map_i915_prio_to_guc_prio(prio);
+	set_bit(CONTEXT_GUC_INIT, &ce->flags);
+}
+
 static int guc_request_alloc(struct i915_request *rq)
 {
 	struct intel_context *ce = rq->context;
@@ -2166,6 +2173,9 @@ static int guc_request_alloc(struct i915_request *rq)
 
 	rq->reserved_space -= GUC_REQUEST_SIZE;
 
+	if (unlikely(!test_bit(CONTEXT_GUC_INIT, &ce->flags)))
+		guc_context_init(ce);
+
 	/*
 	 * Call pin_guc_id here rather than in the pinning step as with
 	 * dma_resv, contexts can be repeatedly pinned / unpinned trashing the
@@ -3042,13 +3052,12 @@ static inline void guc_log_context_priority(struct drm_printer *p,
 {
 	int i;
 
-	drm_printf(p, "\t\tPriority: %d\n",
-		   ce->guc_prio);
+	drm_printf(p, "\t\tPriority: %d\n", ce->guc_active.prio);
 	drm_printf(p, "\t\tNumber Requests (lower index == higher priority)\n");
 	for (i = GUC_CLIENT_PRIORITY_KMD_HIGH;
 	     i < GUC_CLIENT_PRIORITY_NUM; ++i) {
 		drm_printf(p, "\t\tNumber requests in priority band[%d]: %d\n",
-			   i, ce->guc_prio_count[i]);
+			   i, ce->guc_active.prio_count[i]);
 	}
 	drm_printf(p, "\n");
 }
diff --git a/drivers/gpu/drm/i915/i915_trace.h b/drivers/gpu/drm/i915/i915_trace.h
index 510168c1d703..181c5831405b 100644
--- a/drivers/gpu/drm/i915/i915_trace.h
+++ b/drivers/gpu/drm/i915/i915_trace.h
@@ -910,7 +910,7 @@ DECLARE_EVENT_CLASS(intel_context,
 			   __entry->guc_id = ce->guc_id;
 			   __entry->pin_count = atomic_read(&ce->pin_count);
 			   __entry->sched_state = ce->guc_state.sched_state;
-			   __entry->guc_prio = ce->guc_prio;
+			   __entry->guc_prio = ce->guc_active.prio;
 			   ),
 
 		    TP_printk("guc_id=%d, pin_count=%d sched_state=0x%x, guc_prio=%u",
-- 
2.32.0

[Intel-gfx] [PATCH 20/23] drm/i915/guc: Move GuC priority fields in context under guc_active

[Matthew Brost]

Move GuC management fields in context under guc_active struct as this is
where the lock that protects theses fields lives. Also only set guc_prio
field once during context init.

v2:
 (Daniele)
  - set CONTEXT_SET_INIT

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
---
 drivers/gpu/drm/i915/gt/intel_context_types.h | 12 ++--
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 69 +++++++++++--------
 drivers/gpu/drm/i915/i915_trace.h             |  2 +-
 3 files changed, 46 insertions(+), 37 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_context_types.h b/drivers/gpu/drm/i915/gt/intel_context_types.h
index 3a5d98e908f4..b56960a781da 100644
--- a/drivers/gpu/drm/i915/gt/intel_context_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_context_types.h
@@ -112,6 +112,7 @@ struct intel_context {
 #define CONTEXT_FORCE_SINGLE_SUBMISSION	7
 #define CONTEXT_NOPREEMPT		8
 #define CONTEXT_LRCA_DIRTY		9
+#define CONTEXT_GUC_INIT		10
 
 	struct {
 		u64 timeout_us;
@@ -178,6 +179,11 @@ struct intel_context {
 		spinlock_t lock;
 		/** requests: active requests on this context */
 		struct list_head requests;
+		/*
+		 * GuC priority management
+		 */
+		u8 prio;
+		u32 prio_count[GUC_CLIENT_PRIORITY_NUM];
 	} guc_active;
 
 	/* GuC LRC descriptor ID */
@@ -191,12 +197,6 @@ struct intel_context {
 	 */
 	struct list_head guc_id_link;
 
-	/*
-	 * GuC priority management
-	 */
-	u8 guc_prio;
-	u32 guc_prio_count[GUC_CLIENT_PRIORITY_NUM];
-
 #ifdef CONFIG_DRM_I915_SELFTEST
 	/**
 	 * @drop_schedule_enable: Force drop of schedule enable G2H for selftest
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 31f911ae14fa..7e9ee7d5aaab 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -1385,8 +1385,6 @@ static void guc_context_policy_init(struct intel_engine_cs *engine,
 	desc->preemption_timeout = engine->props.preempt_timeout_ms * 1000;
 }
 
-static inline u8 map_i915_prio_to_guc_prio(int prio);
-
 static int guc_lrc_desc_pin(struct intel_context *ce, bool loop)
 {
 	struct intel_engine_cs *engine = ce->engine;
@@ -1394,8 +1392,6 @@ static int guc_lrc_desc_pin(struct intel_context *ce, bool loop)
 	struct intel_guc *guc = &engine->gt->uc.guc;
 	u32 desc_idx = ce->guc_id;
 	struct guc_lrc_desc *desc;
-	const struct i915_gem_context *ctx;
-	int prio = I915_CONTEXT_DEFAULT_PRIORITY;
 	bool context_registered;
 	intel_wakeref_t wakeref;
 	int ret = 0;
@@ -1412,12 +1408,6 @@ static int guc_lrc_desc_pin(struct intel_context *ce, bool loop)
 
 	context_registered = lrc_desc_registered(guc, desc_idx);
 
-	rcu_read_lock();
-	ctx = rcu_dereference(ce->gem_context);
-	if (ctx)
-		prio = ctx->sched.priority;
-	rcu_read_unlock();
-
 	reset_lrc_desc(guc, desc_idx);
 	set_lrc_desc_registered(guc, desc_idx, ce);
 
@@ -1426,8 +1416,7 @@ static int guc_lrc_desc_pin(struct intel_context *ce, bool loop)
 	desc->engine_submit_mask = adjust_engine_mask(engine->class,
 						      engine->mask);
 	desc->hw_context_desc = ce->lrc.lrca;
-	ce->guc_prio = map_i915_prio_to_guc_prio(prio);
-	desc->priority = ce->guc_prio;
+	desc->priority = ce->guc_active.prio;
 	desc->context_flags = CONTEXT_REGISTRATION_FLAG_KMD;
 	guc_context_policy_init(engine, desc);
 
@@ -1822,10 +1811,10 @@ static inline void guc_lrc_desc_unpin(struct intel_context *ce)
 
 static void __guc_context_destroy(struct intel_context *ce)
 {
-	GEM_BUG_ON(ce->guc_prio_count[GUC_CLIENT_PRIORITY_KMD_HIGH] ||
-		   ce->guc_prio_count[GUC_CLIENT_PRIORITY_HIGH] ||
-		   ce->guc_prio_count[GUC_CLIENT_PRIORITY_KMD_NORMAL] ||
-		   ce->guc_prio_count[GUC_CLIENT_PRIORITY_NORMAL]);
+	GEM_BUG_ON(ce->guc_active.prio_count[GUC_CLIENT_PRIORITY_KMD_HIGH] ||
+		   ce->guc_active.prio_count[GUC_CLIENT_PRIORITY_HIGH] ||
+		   ce->guc_active.prio_count[GUC_CLIENT_PRIORITY_KMD_NORMAL] ||
+		   ce->guc_active.prio_count[GUC_CLIENT_PRIORITY_NORMAL]);
 	GEM_BUG_ON(ce->guc_state.number_committed_requests);
 
 	lrc_fini(ce);
@@ -1935,14 +1924,17 @@ static void guc_context_set_prio(struct intel_guc *guc,
 
 	GEM_BUG_ON(prio < GUC_CLIENT_PRIORITY_KMD_HIGH ||
 		   prio > GUC_CLIENT_PRIORITY_NORMAL);
+	lockdep_assert_held(&ce->guc_active.lock);
 
-	if (ce->guc_prio == prio || submission_disabled(guc) ||
-	    !context_registered(ce))
+	if (ce->guc_active.prio == prio || submission_disabled(guc) ||
+	    !context_registered(ce)) {
+		ce->guc_active.prio = prio;
 		return;
+	}
 
 	guc_submission_send_busy_loop(guc, action, ARRAY_SIZE(action), 0, true);
 
-	ce->guc_prio = prio;
+	ce->guc_active.prio = prio;
 	trace_intel_context_set_prio(ce);
 }
 
@@ -1962,24 +1954,24 @@ static inline void add_context_inflight_prio(struct intel_context *ce,
 					     u8 guc_prio)
 {
 	lockdep_assert_held(&ce->guc_active.lock);
-	GEM_BUG_ON(guc_prio >= ARRAY_SIZE(ce->guc_prio_count));
+	GEM_BUG_ON(guc_prio >= ARRAY_SIZE(ce->guc_active.prio_count));
 
-	++ce->guc_prio_count[guc_prio];
+	++ce->guc_active.prio_count[guc_prio];
 
 	/* Overflow protection */
-	GEM_WARN_ON(!ce->guc_prio_count[guc_prio]);
+	GEM_WARN_ON(!ce->guc_active.prio_count[guc_prio]);
 }
 
 static inline void sub_context_inflight_prio(struct intel_context *ce,
 					     u8 guc_prio)
 {
 	lockdep_assert_held(&ce->guc_active.lock);
-	GEM_BUG_ON(guc_prio >= ARRAY_SIZE(ce->guc_prio_count));
+	GEM_BUG_ON(guc_prio >= ARRAY_SIZE(ce->guc_active.prio_count));
 
 	/* Underflow protection */
-	GEM_WARN_ON(!ce->guc_prio_count[guc_prio]);
+	GEM_WARN_ON(!ce->guc_active.prio_count[guc_prio]);
 
-	--ce->guc_prio_count[guc_prio];
+	--ce->guc_active.prio_count[guc_prio];
 }
 
 static inline void update_context_prio(struct intel_context *ce)
@@ -1992,8 +1984,8 @@ static inline void update_context_prio(struct intel_context *ce)
 
 	lockdep_assert_held(&ce->guc_active.lock);
 
-	for (i = 0; i < ARRAY_SIZE(ce->guc_prio_count); ++i) {
-		if (ce->guc_prio_count[i]) {
+	for (i = 0; i < ARRAY_SIZE(ce->guc_active.prio_count); ++i) {
+		if (ce->guc_active.prio_count[i]) {
 			guc_context_set_prio(guc, ce, i);
 			break;
 		}
@@ -2135,6 +2127,21 @@ static bool context_needs_register(struct intel_context *ce, bool new_guc_id)
 		!submission_disabled(ce_to_guc(ce));
 }
 
+static void guc_context_init(struct intel_context *ce)
+{
+	const struct i915_gem_context *ctx;
+	int prio = I915_CONTEXT_DEFAULT_PRIORITY;
+
+	rcu_read_lock();
+	ctx = rcu_dereference(ce->gem_context);
+	if (ctx)
+		prio = ctx->sched.priority;
+	rcu_read_unlock();
+
+	ce->guc_active.prio = map_i915_prio_to_guc_prio(prio);
+	set_bit(CONTEXT_GUC_INIT, &ce->flags);
+}
+
 static int guc_request_alloc(struct i915_request *rq)
 {
 	struct intel_context *ce = rq->context;
@@ -2166,6 +2173,9 @@ static int guc_request_alloc(struct i915_request *rq)
 
 	rq->reserved_space -= GUC_REQUEST_SIZE;
 
+	if (unlikely(!test_bit(CONTEXT_GUC_INIT, &ce->flags)))
+		guc_context_init(ce);
+
 	/*
 	 * Call pin_guc_id here rather than in the pinning step as with
 	 * dma_resv, contexts can be repeatedly pinned / unpinned trashing the
@@ -3042,13 +3052,12 @@ static inline void guc_log_context_priority(struct drm_printer *p,
 {
 	int i;
 
-	drm_printf(p, "\t\tPriority: %d\n",
-		   ce->guc_prio);
+	drm_printf(p, "\t\tPriority: %d\n", ce->guc_active.prio);
 	drm_printf(p, "\t\tNumber Requests (lower index == higher priority)\n");
 	for (i = GUC_CLIENT_PRIORITY_KMD_HIGH;
 	     i < GUC_CLIENT_PRIORITY_NUM; ++i) {
 		drm_printf(p, "\t\tNumber requests in priority band[%d]: %d\n",
-			   i, ce->guc_prio_count[i]);
+			   i, ce->guc_active.prio_count[i]);
 	}
 	drm_printf(p, "\n");
 }
diff --git a/drivers/gpu/drm/i915/i915_trace.h b/drivers/gpu/drm/i915/i915_trace.h
index 510168c1d703..181c5831405b 100644
--- a/drivers/gpu/drm/i915/i915_trace.h
+++ b/drivers/gpu/drm/i915/i915_trace.h
@@ -910,7 +910,7 @@ DECLARE_EVENT_CLASS(intel_context,
 			   __entry->guc_id = ce->guc_id;
 			   __entry->pin_count = atomic_read(&ce->pin_count);
 			   __entry->sched_state = ce->guc_state.sched_state;
-			   __entry->guc_prio = ce->guc_prio;
+			   __entry->guc_prio = ce->guc_active.prio;
 			   ),
 
 		    TP_printk("guc_id=%d, pin_count=%d sched_state=0x%x, guc_prio=%u",
-- 
2.32.0

[PATCH 21/23] drm/i915/guc: Move fields protected by guc->contexts_lock into sub structure

[Matthew Brost]

To make ownership of locking clear move fields (guc_id, guc_id_ref,
guc_id_link) to sub structure guc_id in intel_context.

Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
---
 drivers/gpu/drm/i915/gt/intel_context.c       |   4 +-
 drivers/gpu/drm/i915/gt/intel_context_types.h |  18 +--
 drivers/gpu/drm/i915/gt/selftest_hangcheck.c  |   6 +-
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 104 +++++++++---------
 drivers/gpu/drm/i915/i915_trace.h             |   4 +-
 5 files changed, 69 insertions(+), 67 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_context.c b/drivers/gpu/drm/i915/gt/intel_context.c
index 3048267ddc7e..485460a11331 100644
--- a/drivers/gpu/drm/i915/gt/intel_context.c
+++ b/drivers/gpu/drm/i915/gt/intel_context.c
@@ -398,8 +398,8 @@ intel_context_init(struct intel_context *ce, struct intel_engine_cs *engine)
 	spin_lock_init(&ce->guc_active.lock);
 	INIT_LIST_HEAD(&ce->guc_active.requests);
 
-	ce->guc_id = GUC_INVALID_LRC_ID;
-	INIT_LIST_HEAD(&ce->guc_id_link);
+	ce->guc_id.id = GUC_INVALID_LRC_ID;
+	INIT_LIST_HEAD(&ce->guc_id.link);
 
 	/*
 	 * Initialize fence to be complete as this is expected to be complete
diff --git a/drivers/gpu/drm/i915/gt/intel_context_types.h b/drivers/gpu/drm/i915/gt/intel_context_types.h
index b56960a781da..0b00d249c884 100644
--- a/drivers/gpu/drm/i915/gt/intel_context_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_context_types.h
@@ -186,16 +186,18 @@ struct intel_context {
 		u32 prio_count[GUC_CLIENT_PRIORITY_NUM];
 	} guc_active;
 
-	/* GuC LRC descriptor ID */
-	u16 guc_id;
+	struct {
+		/* GuC LRC descriptor ID */
+		u16 id;
 
-	/* GuC LRC descriptor reference count */
-	atomic_t guc_id_ref;
+		/* GuC LRC descriptor reference count */
+		atomic_t ref;
 
-	/*
-	 * GuC ID link - in list when unpinned but guc_id still valid in GuC
-	 */
-	struct list_head guc_id_link;
+		/*
+		 * GuC ID link - in list when unpinned but guc_id still valid in GuC
+		 */
+		struct list_head link;
+	} guc_id;
 
 #ifdef CONFIG_DRM_I915_SELFTEST
 	/**
diff --git a/drivers/gpu/drm/i915/gt/selftest_hangcheck.c b/drivers/gpu/drm/i915/gt/selftest_hangcheck.c
index 8be23e0f9306..7e6fdabac599 100644
--- a/drivers/gpu/drm/i915/gt/selftest_hangcheck.c
+++ b/drivers/gpu/drm/i915/gt/selftest_hangcheck.c
@@ -789,7 +789,7 @@ static int __igt_reset_engine(struct intel_gt *gt, bool active)
 				if (err)
 					pr_err("[%s] Wait for request %lld:%lld [0x%04X] failed: %d!\n",
 					       engine->name, rq->fence.context,
-					       rq->fence.seqno, rq->context->guc_id, err);
+					       rq->fence.seqno, rq->context->guc_id.id, err);
 			}
 
 skip:
@@ -1098,7 +1098,7 @@ static int __igt_reset_engines(struct intel_gt *gt,
 				if (err)
 					pr_err("[%s] Wait for request %lld:%lld [0x%04X] failed: %d!\n",
 					       engine->name, rq->fence.context,
-					       rq->fence.seqno, rq->context->guc_id, err);
+					       rq->fence.seqno, rq->context->guc_id.id, err);
 			}
 
 			count++;
@@ -1108,7 +1108,7 @@ static int __igt_reset_engines(struct intel_gt *gt,
 					pr_err("i915_reset_engine(%s:%s): failed to reset request %lld:%lld [0x%04X]\n",
 					       engine->name, test_name,
 					       rq->fence.context,
-					       rq->fence.seqno, rq->context->guc_id);
+					       rq->fence.seqno, rq->context->guc_id.id);
 					i915_request_put(rq);
 
 					GEM_TRACE_DUMP();
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 7e9ee7d5aaab..2c9a6b4ce071 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -270,12 +270,12 @@ static inline void decr_context_committed_requests(struct intel_context *ce)
 
 static inline bool context_guc_id_invalid(struct intel_context *ce)
 {
-	return ce->guc_id == GUC_INVALID_LRC_ID;
+	return ce->guc_id.id == GUC_INVALID_LRC_ID;
 }
 
 static inline void set_context_guc_id_invalid(struct intel_context *ce)
 {
-	ce->guc_id = GUC_INVALID_LRC_ID;
+	ce->guc_id.id = GUC_INVALID_LRC_ID;
 }
 
 static inline struct intel_guc *ce_to_guc(struct intel_context *ce)
@@ -468,14 +468,14 @@ static int guc_add_request(struct intel_guc *guc, struct i915_request *rq)
 		return 0;
 	}
 
-	GEM_BUG_ON(!atomic_read(&ce->guc_id_ref));
+	GEM_BUG_ON(!atomic_read(&ce->guc_id.ref));
 	GEM_BUG_ON(context_guc_id_invalid(ce));
 
 	/*
 	 * Corner case where the GuC firmware was blown away and reloaded while
 	 * this context was pinned.
 	 */
-	if (unlikely(!lrc_desc_registered(guc, ce->guc_id))) {
+	if (unlikely(!lrc_desc_registered(guc, ce->guc_id.id))) {
 		err = guc_lrc_desc_pin(ce, false);
 		if (unlikely(err))
 			return err;
@@ -494,14 +494,14 @@ static int guc_add_request(struct intel_guc *guc, struct i915_request *rq)
 
 	if (!enabled) {
 		action[len++] = INTEL_GUC_ACTION_SCHED_CONTEXT_MODE_SET;
-		action[len++] = ce->guc_id;
+		action[len++] = ce->guc_id.id;
 		action[len++] = GUC_CONTEXT_ENABLE;
 		set_context_pending_enable(ce);
 		intel_context_get(ce);
 		g2h_len_dw = G2H_LEN_DW_SCHED_CONTEXT_MODE_SET;
 	} else {
 		action[len++] = INTEL_GUC_ACTION_SCHED_CONTEXT;
-		action[len++] = ce->guc_id;
+		action[len++] = ce->guc_id.id;
 	}
 
 	err = intel_guc_send_nb(guc, action, len, g2h_len_dw);
@@ -1167,12 +1167,12 @@ static int new_guc_id(struct intel_guc *guc)
 static void __release_guc_id(struct intel_guc *guc, struct intel_context *ce)
 {
 	if (!context_guc_id_invalid(ce)) {
-		ida_simple_remove(&guc->guc_ids, ce->guc_id);
-		reset_lrc_desc(guc, ce->guc_id);
+		ida_simple_remove(&guc->guc_ids, ce->guc_id.id);
+		reset_lrc_desc(guc, ce->guc_id.id);
 		set_context_guc_id_invalid(ce);
 	}
-	if (!list_empty(&ce->guc_id_link))
-		list_del_init(&ce->guc_id_link);
+	if (!list_empty(&ce->guc_id.link))
+		list_del_init(&ce->guc_id.link);
 }
 
 static void release_guc_id(struct intel_guc *guc, struct intel_context *ce)
@@ -1194,13 +1194,13 @@ static int steal_guc_id(struct intel_guc *guc)
 	if (!list_empty(&guc->guc_id_list)) {
 		ce = list_first_entry(&guc->guc_id_list,
 				      struct intel_context,
-				      guc_id_link);
+				      guc_id.link);
 
-		GEM_BUG_ON(atomic_read(&ce->guc_id_ref));
+		GEM_BUG_ON(atomic_read(&ce->guc_id.ref));
 		GEM_BUG_ON(context_guc_id_invalid(ce));
 
-		list_del_init(&ce->guc_id_link);
-		guc_id = ce->guc_id;
+		list_del_init(&ce->guc_id.link);
+		guc_id = ce->guc_id.id;
 
 		spin_lock(&ce->guc_state.lock);
 		clr_context_registered(ce);
@@ -1236,7 +1236,7 @@ static int pin_guc_id(struct intel_guc *guc, struct intel_context *ce)
 	int ret = 0;
 	unsigned long flags, tries = PIN_GUC_ID_TRIES;
 
-	GEM_BUG_ON(atomic_read(&ce->guc_id_ref));
+	GEM_BUG_ON(atomic_read(&ce->guc_id.ref));
 
 try_again:
 	spin_lock_irqsave(&guc->contexts_lock, flags);
@@ -1244,20 +1244,20 @@ static int pin_guc_id(struct intel_guc *guc, struct intel_context *ce)
 	might_lock(&ce->guc_state.lock);
 
 	if (context_guc_id_invalid(ce)) {
-		ret = assign_guc_id(guc, &ce->guc_id);
+		ret = assign_guc_id(guc, &ce->guc_id.id);
 		if (ret)
 			goto out_unlock;
 		ret = 1;	/* Indidcates newly assigned guc_id */
 	}
-	if (!list_empty(&ce->guc_id_link))
-		list_del_init(&ce->guc_id_link);
-	atomic_inc(&ce->guc_id_ref);
+	if (!list_empty(&ce->guc_id.link))
+		list_del_init(&ce->guc_id.link);
+	atomic_inc(&ce->guc_id.ref);
 
 out_unlock:
 	spin_unlock_irqrestore(&guc->contexts_lock, flags);
 
 	/*
-	 * -EAGAIN indicates no guc_ids are available, let's retire any
+	 * -EAGAIN indicates no guc_id are available, let's retire any
 	 * outstanding requests to see if that frees up a guc_id. If the first
 	 * retire didn't help, insert a sleep with the timeslice duration before
 	 * attempting to retire more requests. Double the sleep period each
@@ -1285,15 +1285,15 @@ static void unpin_guc_id(struct intel_guc *guc, struct intel_context *ce)
 {
 	unsigned long flags;
 
-	GEM_BUG_ON(atomic_read(&ce->guc_id_ref) < 0);
+	GEM_BUG_ON(atomic_read(&ce->guc_id.ref) < 0);
 
 	if (unlikely(context_guc_id_invalid(ce)))
 		return;
 
 	spin_lock_irqsave(&guc->contexts_lock, flags);
-	if (!context_guc_id_invalid(ce) && list_empty(&ce->guc_id_link) &&
-	    !atomic_read(&ce->guc_id_ref))
-		list_add_tail(&ce->guc_id_link, &guc->guc_id_list);
+	if (!context_guc_id_invalid(ce) && list_empty(&ce->guc_id.link) &&
+	    !atomic_read(&ce->guc_id.ref))
+		list_add_tail(&ce->guc_id.link, &guc->guc_id_list);
 	spin_unlock_irqrestore(&guc->contexts_lock, flags);
 }
 
@@ -1316,12 +1316,12 @@ static int register_context(struct intel_context *ce, bool loop)
 {
 	struct intel_guc *guc = ce_to_guc(ce);
 	u32 offset = intel_guc_ggtt_offset(guc, guc->lrc_desc_pool) +
-		ce->guc_id * sizeof(struct guc_lrc_desc);
+		ce->guc_id.id * sizeof(struct guc_lrc_desc);
 	int ret;
 
 	trace_intel_context_register(ce);
 
-	ret = __guc_action_register_context(guc, ce->guc_id, offset, loop);
+	ret = __guc_action_register_context(guc, ce->guc_id.id, offset, loop);
 	if (likely(!ret)) {
 		unsigned long flags;
 
@@ -1390,7 +1390,7 @@ static int guc_lrc_desc_pin(struct intel_context *ce, bool loop)
 	struct intel_engine_cs *engine = ce->engine;
 	struct intel_runtime_pm *runtime_pm = engine->uncore->rpm;
 	struct intel_guc *guc = &engine->gt->uc.guc;
-	u32 desc_idx = ce->guc_id;
+	u32 desc_idx = ce->guc_id.id;
 	struct guc_lrc_desc *desc;
 	bool context_registered;
 	intel_wakeref_t wakeref;
@@ -1453,7 +1453,7 @@ static int guc_lrc_desc_pin(struct intel_context *ce, bool loop)
 		 * context whose guc_id was stolen.
 		 */
 		with_intel_runtime_pm(runtime_pm, wakeref)
-			ret = deregister_context(ce, ce->guc_id);
+			ret = deregister_context(ce, ce->guc_id.id);
 		if (unlikely(ret == -ENODEV))
 			ret = 0;	/* Will get registered later */
 	} else {
@@ -1524,7 +1524,7 @@ static void __guc_context_sched_enable(struct intel_guc *guc,
 {
 	u32 action[] = {
 		INTEL_GUC_ACTION_SCHED_CONTEXT_MODE_SET,
-		ce->guc_id,
+		ce->guc_id.id,
 		GUC_CONTEXT_ENABLE
 	};
 
@@ -1540,7 +1540,7 @@ static void __guc_context_sched_disable(struct intel_guc *guc,
 {
 	u32 action[] = {
 		INTEL_GUC_ACTION_SCHED_CONTEXT_MODE_SET,
-		guc_id,	/* ce->guc_id not stable */
+		guc_id,	/* ce->guc_id.id not stable */
 		GUC_CONTEXT_DISABLE
 	};
 
@@ -1585,7 +1585,7 @@ static u16 prep_context_pending_disable(struct intel_context *ce)
 	guc_blocked_fence_reinit(ce);
 	intel_context_get(ce);
 
-	return ce->guc_id;
+	return ce->guc_id.id;
 }
 
 static struct i915_sw_fence *guc_context_block(struct intel_context *ce)
@@ -1638,7 +1638,7 @@ static bool context_cant_unblock(struct intel_context *ce)
 
 	return (ce->guc_state.sched_state & SCHED_STATE_NO_UNBLOCK) ||
 		context_guc_id_invalid(ce) ||
-		!lrc_desc_registered(ce_to_guc(ce), ce->guc_id) ||
+		!lrc_desc_registered(ce_to_guc(ce), ce->guc_id.id) ||
 		!intel_context_is_pinned(ce);
 }
 
@@ -1757,7 +1757,7 @@ static void guc_context_ban(struct intel_context *ce, struct i915_request *rq)
 		if (!context_guc_id_invalid(ce))
 			with_intel_runtime_pm(runtime_pm, wakeref)
 				__guc_context_set_preemption_timeout(guc,
-								     ce->guc_id,
+								     ce->guc_id.id,
 								     1);
 		spin_unlock_irqrestore(&ce->guc_state.lock, flags);
 	}
@@ -1802,11 +1802,11 @@ static inline void guc_lrc_desc_unpin(struct intel_context *ce)
 {
 	struct intel_guc *guc = ce_to_guc(ce);
 
-	GEM_BUG_ON(!lrc_desc_registered(guc, ce->guc_id));
-	GEM_BUG_ON(ce != __get_context(guc, ce->guc_id));
+	GEM_BUG_ON(!lrc_desc_registered(guc, ce->guc_id.id));
+	GEM_BUG_ON(ce != __get_context(guc, ce->guc_id.id));
 	GEM_BUG_ON(context_enabled(ce));
 
-	deregister_context(ce, ce->guc_id);
+	deregister_context(ce, ce->guc_id.id);
 }
 
 static void __guc_context_destroy(struct intel_context *ce)
@@ -1851,7 +1851,7 @@ static void guc_context_destroy(struct kref *kref)
 		__guc_context_destroy(ce);
 		return;
 	} else if (submission_disabled(guc) ||
-		   !lrc_desc_registered(guc, ce->guc_id)) {
+		   !lrc_desc_registered(guc, ce->guc_id.id)) {
 		release_guc_id(guc, ce);
 		__guc_context_destroy(ce);
 		return;
@@ -1860,10 +1860,10 @@ static void guc_context_destroy(struct kref *kref)
 	/*
 	 * We have to acquire the context spinlock and check guc_id again, if it
 	 * is valid it hasn't been stolen and needs to be deregistered. We
-	 * delete this context from the list of unpinned guc_ids available to
+	 * delete this context from the list of unpinned guc_id available to
 	 * steal to seal a race with guc_lrc_desc_pin(). When the G2H CTB
 	 * returns indicating this context has been deregistered the guc_id is
-	 * returned to the pool of available guc_ids.
+	 * returned to the pool of available guc_id.
 	 */
 	spin_lock_irqsave(&guc->contexts_lock, flags);
 	if (context_guc_id_invalid(ce)) {
@@ -1872,8 +1872,8 @@ static void guc_context_destroy(struct kref *kref)
 		return;
 	}
 
-	if (!list_empty(&ce->guc_id_link))
-		list_del_init(&ce->guc_id_link);
+	if (!list_empty(&ce->guc_id.link))
+		list_del_init(&ce->guc_id.link);
 	spin_unlock_irqrestore(&guc->contexts_lock, flags);
 
 	/* Seal race with Reset */
@@ -1918,7 +1918,7 @@ static void guc_context_set_prio(struct intel_guc *guc,
 {
 	u32 action[] = {
 		INTEL_GUC_ACTION_SET_CONTEXT_PRIORITY,
-		ce->guc_id,
+		ce->guc_id.id,
 		prio,
 	};
 
@@ -2053,7 +2053,7 @@ static void remove_from_context(struct i915_request *rq)
 	decr_context_committed_requests(ce);
 	spin_unlock_irq(&ce->guc_state.lock);
 
-	atomic_dec(&ce->guc_id_ref);
+	atomic_dec(&ce->guc_id.ref);
 	i915_request_notify_execute_cb_imm(rq);
 }
 
@@ -2123,7 +2123,7 @@ static void guc_signal_context_fence(struct intel_context *ce)
 static bool context_needs_register(struct intel_context *ce, bool new_guc_id)
 {
 	return (new_guc_id || test_bit(CONTEXT_LRCA_DIRTY, &ce->flags) ||
-		!lrc_desc_registered(ce_to_guc(ce), ce->guc_id)) &&
+		!lrc_desc_registered(ce_to_guc(ce), ce->guc_id.id)) &&
 		!submission_disabled(ce_to_guc(ce));
 }
 
@@ -2179,11 +2179,11 @@ static int guc_request_alloc(struct i915_request *rq)
 	/*
 	 * Call pin_guc_id here rather than in the pinning step as with
 	 * dma_resv, contexts can be repeatedly pinned / unpinned trashing the
-	 * guc_ids and creating horrible race conditions. This is especially bad
-	 * when guc_ids are being stolen due to over subscription. By the time
+	 * guc_id and creating horrible race conditions. This is especially bad
+	 * when guc_id are being stolen due to over subscription. By the time
 	 * this function is reached, it is guaranteed that the guc_id will be
 	 * persistent until the generated request is retired. Thus, sealing these
-	 * race conditions. It is still safe to fail here if guc_ids are
+	 * race conditions. It is still safe to fail here if guc_id are
 	 * exhausted and return -EAGAIN to the user indicating that they can try
 	 * again in the future.
 	 *
@@ -2193,7 +2193,7 @@ static int guc_request_alloc(struct i915_request *rq)
 	 * decremented on each retire. When it is zero, a lock around the
 	 * increment (in pin_guc_id) is needed to seal a race with unpin_guc_id.
 	 */
-	if (atomic_add_unless(&ce->guc_id_ref, 1, 0))
+	if (atomic_add_unless(&ce->guc_id.ref, 1, 0))
 		goto out;
 
 	ret = pin_guc_id(guc, ce);	/* returns 1 if new guc_id assigned */
@@ -2206,7 +2206,7 @@ static int guc_request_alloc(struct i915_request *rq)
 				disable_submission(guc);
 				goto out;	/* GPU will be reset */
 			}
-			atomic_dec(&ce->guc_id_ref);
+			atomic_dec(&ce->guc_id.ref);
 			unpin_guc_id(guc, ce);
 			return ret;
 		}
@@ -3040,7 +3040,7 @@ void intel_guc_submission_print_info(struct intel_guc *guc,
 
 		priolist_for_each_request(rq, pl)
 			drm_printf(p, "guc_id=%u, seqno=%llu\n",
-				   rq->context->guc_id,
+				   rq->context->guc_id.id,
 				   rq->fence.seqno);
 	}
 	spin_unlock_irqrestore(&sched_engine->lock, flags);
@@ -3071,7 +3071,7 @@ void intel_guc_submission_print_context_info(struct intel_guc *guc,
 
 	xa_lock_irqsave(&guc->context_lookup, flags);
 	xa_for_each(&guc->context_lookup, index, ce) {
-		drm_printf(p, "GuC lrc descriptor %u:\n", ce->guc_id);
+		drm_printf(p, "GuC lrc descriptor %u:\n", ce->guc_id.id);
 		drm_printf(p, "\tHW Context Desc: 0x%08x\n", ce->lrc.lrca);
 		drm_printf(p, "\t\tLRC Head: Internal %u, Memory %u\n",
 			   ce->ring->head,
@@ -3082,7 +3082,7 @@ void intel_guc_submission_print_context_info(struct intel_guc *guc,
 		drm_printf(p, "\t\tContext Pin Count: %u\n",
 			   atomic_read(&ce->pin_count));
 		drm_printf(p, "\t\tGuC ID Ref Count: %u\n",
-			   atomic_read(&ce->guc_id_ref));
+			   atomic_read(&ce->guc_id.ref));
 		drm_printf(p, "\t\tSchedule State: 0x%x\n\n",
 			   ce->guc_state.sched_state);
 
diff --git a/drivers/gpu/drm/i915/i915_trace.h b/drivers/gpu/drm/i915/i915_trace.h
index 181c5831405b..75a40a33e13a 100644
--- a/drivers/gpu/drm/i915/i915_trace.h
+++ b/drivers/gpu/drm/i915/i915_trace.h
@@ -805,7 +805,7 @@ DECLARE_EVENT_CLASS(i915_request,
 			   __entry->dev = rq->engine->i915->drm.primary->index;
 			   __entry->class = rq->engine->uabi_class;
 			   __entry->instance = rq->engine->uabi_instance;
-			   __entry->guc_id = rq->context->guc_id;
+			   __entry->guc_id = rq->context->guc_id.id;
 			   __entry->ctx = rq->fence.context;
 			   __entry->seqno = rq->fence.seqno;
 			   __entry->tail = rq->tail;
@@ -907,7 +907,7 @@ DECLARE_EVENT_CLASS(intel_context,
 			     ),
 
 		    TP_fast_assign(
-			   __entry->guc_id = ce->guc_id;
+			   __entry->guc_id = ce->guc_id.id;
 			   __entry->pin_count = atomic_read(&ce->pin_count);
 			   __entry->sched_state = ce->guc_state.sched_state;
 			   __entry->guc_prio = ce->guc_active.prio;
-- 
2.32.0

[Intel-gfx] [PATCH 21/23] drm/i915/guc: Move fields protected by guc->contexts_lock into sub structure

[Matthew Brost]

To make ownership of locking clear move fields (guc_id, guc_id_ref,
guc_id_link) to sub structure guc_id in intel_context.

Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
---
 drivers/gpu/drm/i915/gt/intel_context.c       |   4 +-
 drivers/gpu/drm/i915/gt/intel_context_types.h |  18 +--
 drivers/gpu/drm/i915/gt/selftest_hangcheck.c  |   6 +-
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 104 +++++++++---------
 drivers/gpu/drm/i915/i915_trace.h             |   4 +-
 5 files changed, 69 insertions(+), 67 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_context.c b/drivers/gpu/drm/i915/gt/intel_context.c
index 3048267ddc7e..485460a11331 100644
--- a/drivers/gpu/drm/i915/gt/intel_context.c
+++ b/drivers/gpu/drm/i915/gt/intel_context.c
@@ -398,8 +398,8 @@ intel_context_init(struct intel_context *ce, struct intel_engine_cs *engine)
 	spin_lock_init(&ce->guc_active.lock);
 	INIT_LIST_HEAD(&ce->guc_active.requests);
 
-	ce->guc_id = GUC_INVALID_LRC_ID;
-	INIT_LIST_HEAD(&ce->guc_id_link);
+	ce->guc_id.id = GUC_INVALID_LRC_ID;
+	INIT_LIST_HEAD(&ce->guc_id.link);
 
 	/*
 	 * Initialize fence to be complete as this is expected to be complete
diff --git a/drivers/gpu/drm/i915/gt/intel_context_types.h b/drivers/gpu/drm/i915/gt/intel_context_types.h
index b56960a781da..0b00d249c884 100644
--- a/drivers/gpu/drm/i915/gt/intel_context_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_context_types.h
@@ -186,16 +186,18 @@ struct intel_context {
 		u32 prio_count[GUC_CLIENT_PRIORITY_NUM];
 	} guc_active;
 
-	/* GuC LRC descriptor ID */
-	u16 guc_id;
+	struct {
+		/* GuC LRC descriptor ID */
+		u16 id;
 
-	/* GuC LRC descriptor reference count */
-	atomic_t guc_id_ref;
+		/* GuC LRC descriptor reference count */
+		atomic_t ref;
 
-	/*
-	 * GuC ID link - in list when unpinned but guc_id still valid in GuC
-	 */
-	struct list_head guc_id_link;
+		/*
+		 * GuC ID link - in list when unpinned but guc_id still valid in GuC
+		 */
+		struct list_head link;
+	} guc_id;
 
 #ifdef CONFIG_DRM_I915_SELFTEST
 	/**
diff --git a/drivers/gpu/drm/i915/gt/selftest_hangcheck.c b/drivers/gpu/drm/i915/gt/selftest_hangcheck.c
index 8be23e0f9306..7e6fdabac599 100644
--- a/drivers/gpu/drm/i915/gt/selftest_hangcheck.c
+++ b/drivers/gpu/drm/i915/gt/selftest_hangcheck.c
@@ -789,7 +789,7 @@ static int __igt_reset_engine(struct intel_gt *gt, bool active)
 				if (err)
 					pr_err("[%s] Wait for request %lld:%lld [0x%04X] failed: %d!\n",
 					       engine->name, rq->fence.context,
-					       rq->fence.seqno, rq->context->guc_id, err);
+					       rq->fence.seqno, rq->context->guc_id.id, err);
 			}
 
 skip:
@@ -1098,7 +1098,7 @@ static int __igt_reset_engines(struct intel_gt *gt,
 				if (err)
 					pr_err("[%s] Wait for request %lld:%lld [0x%04X] failed: %d!\n",
 					       engine->name, rq->fence.context,
-					       rq->fence.seqno, rq->context->guc_id, err);
+					       rq->fence.seqno, rq->context->guc_id.id, err);
 			}
 
 			count++;
@@ -1108,7 +1108,7 @@ static int __igt_reset_engines(struct intel_gt *gt,
 					pr_err("i915_reset_engine(%s:%s): failed to reset request %lld:%lld [0x%04X]\n",
 					       engine->name, test_name,
 					       rq->fence.context,
-					       rq->fence.seqno, rq->context->guc_id);
+					       rq->fence.seqno, rq->context->guc_id.id);
 					i915_request_put(rq);
 
 					GEM_TRACE_DUMP();
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 7e9ee7d5aaab..2c9a6b4ce071 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -270,12 +270,12 @@ static inline void decr_context_committed_requests(struct intel_context *ce)
 
 static inline bool context_guc_id_invalid(struct intel_context *ce)
 {
-	return ce->guc_id == GUC_INVALID_LRC_ID;
+	return ce->guc_id.id == GUC_INVALID_LRC_ID;
 }
 
 static inline void set_context_guc_id_invalid(struct intel_context *ce)
 {
-	ce->guc_id = GUC_INVALID_LRC_ID;
+	ce->guc_id.id = GUC_INVALID_LRC_ID;
 }
 
 static inline struct intel_guc *ce_to_guc(struct intel_context *ce)
@@ -468,14 +468,14 @@ static int guc_add_request(struct intel_guc *guc, struct i915_request *rq)
 		return 0;
 	}
 
-	GEM_BUG_ON(!atomic_read(&ce->guc_id_ref));
+	GEM_BUG_ON(!atomic_read(&ce->guc_id.ref));
 	GEM_BUG_ON(context_guc_id_invalid(ce));
 
 	/*
 	 * Corner case where the GuC firmware was blown away and reloaded while
 	 * this context was pinned.
 	 */
-	if (unlikely(!lrc_desc_registered(guc, ce->guc_id))) {
+	if (unlikely(!lrc_desc_registered(guc, ce->guc_id.id))) {
 		err = guc_lrc_desc_pin(ce, false);
 		if (unlikely(err))
 			return err;
@@ -494,14 +494,14 @@ static int guc_add_request(struct intel_guc *guc, struct i915_request *rq)
 
 	if (!enabled) {
 		action[len++] = INTEL_GUC_ACTION_SCHED_CONTEXT_MODE_SET;
-		action[len++] = ce->guc_id;
+		action[len++] = ce->guc_id.id;
 		action[len++] = GUC_CONTEXT_ENABLE;
 		set_context_pending_enable(ce);
 		intel_context_get(ce);
 		g2h_len_dw = G2H_LEN_DW_SCHED_CONTEXT_MODE_SET;
 	} else {
 		action[len++] = INTEL_GUC_ACTION_SCHED_CONTEXT;
-		action[len++] = ce->guc_id;
+		action[len++] = ce->guc_id.id;
 	}
 
 	err = intel_guc_send_nb(guc, action, len, g2h_len_dw);
@@ -1167,12 +1167,12 @@ static int new_guc_id(struct intel_guc *guc)
 static void __release_guc_id(struct intel_guc *guc, struct intel_context *ce)
 {
 	if (!context_guc_id_invalid(ce)) {
-		ida_simple_remove(&guc->guc_ids, ce->guc_id);
-		reset_lrc_desc(guc, ce->guc_id);
+		ida_simple_remove(&guc->guc_ids, ce->guc_id.id);
+		reset_lrc_desc(guc, ce->guc_id.id);
 		set_context_guc_id_invalid(ce);
 	}
-	if (!list_empty(&ce->guc_id_link))
-		list_del_init(&ce->guc_id_link);
+	if (!list_empty(&ce->guc_id.link))
+		list_del_init(&ce->guc_id.link);
 }
 
 static void release_guc_id(struct intel_guc *guc, struct intel_context *ce)
@@ -1194,13 +1194,13 @@ static int steal_guc_id(struct intel_guc *guc)
 	if (!list_empty(&guc->guc_id_list)) {
 		ce = list_first_entry(&guc->guc_id_list,
 				      struct intel_context,
-				      guc_id_link);
+				      guc_id.link);
 
-		GEM_BUG_ON(atomic_read(&ce->guc_id_ref));
+		GEM_BUG_ON(atomic_read(&ce->guc_id.ref));
 		GEM_BUG_ON(context_guc_id_invalid(ce));
 
-		list_del_init(&ce->guc_id_link);
-		guc_id = ce->guc_id;
+		list_del_init(&ce->guc_id.link);
+		guc_id = ce->guc_id.id;
 
 		spin_lock(&ce->guc_state.lock);
 		clr_context_registered(ce);
@@ -1236,7 +1236,7 @@ static int pin_guc_id(struct intel_guc *guc, struct intel_context *ce)
 	int ret = 0;
 	unsigned long flags, tries = PIN_GUC_ID_TRIES;
 
-	GEM_BUG_ON(atomic_read(&ce->guc_id_ref));
+	GEM_BUG_ON(atomic_read(&ce->guc_id.ref));
 
 try_again:
 	spin_lock_irqsave(&guc->contexts_lock, flags);
@@ -1244,20 +1244,20 @@ static int pin_guc_id(struct intel_guc *guc, struct intel_context *ce)
 	might_lock(&ce->guc_state.lock);
 
 	if (context_guc_id_invalid(ce)) {
-		ret = assign_guc_id(guc, &ce->guc_id);
+		ret = assign_guc_id(guc, &ce->guc_id.id);
 		if (ret)
 			goto out_unlock;
 		ret = 1;	/* Indidcates newly assigned guc_id */
 	}
-	if (!list_empty(&ce->guc_id_link))
-		list_del_init(&ce->guc_id_link);
-	atomic_inc(&ce->guc_id_ref);
+	if (!list_empty(&ce->guc_id.link))
+		list_del_init(&ce->guc_id.link);
+	atomic_inc(&ce->guc_id.ref);
 
 out_unlock:
 	spin_unlock_irqrestore(&guc->contexts_lock, flags);
 
 	/*
-	 * -EAGAIN indicates no guc_ids are available, let's retire any
+	 * -EAGAIN indicates no guc_id are available, let's retire any
 	 * outstanding requests to see if that frees up a guc_id. If the first
 	 * retire didn't help, insert a sleep with the timeslice duration before
 	 * attempting to retire more requests. Double the sleep period each
@@ -1285,15 +1285,15 @@ static void unpin_guc_id(struct intel_guc *guc, struct intel_context *ce)
 {
 	unsigned long flags;
 
-	GEM_BUG_ON(atomic_read(&ce->guc_id_ref) < 0);
+	GEM_BUG_ON(atomic_read(&ce->guc_id.ref) < 0);
 
 	if (unlikely(context_guc_id_invalid(ce)))
 		return;
 
 	spin_lock_irqsave(&guc->contexts_lock, flags);
-	if (!context_guc_id_invalid(ce) && list_empty(&ce->guc_id_link) &&
-	    !atomic_read(&ce->guc_id_ref))
-		list_add_tail(&ce->guc_id_link, &guc->guc_id_list);
+	if (!context_guc_id_invalid(ce) && list_empty(&ce->guc_id.link) &&
+	    !atomic_read(&ce->guc_id.ref))
+		list_add_tail(&ce->guc_id.link, &guc->guc_id_list);
 	spin_unlock_irqrestore(&guc->contexts_lock, flags);
 }
 
@@ -1316,12 +1316,12 @@ static int register_context(struct intel_context *ce, bool loop)
 {
 	struct intel_guc *guc = ce_to_guc(ce);
 	u32 offset = intel_guc_ggtt_offset(guc, guc->lrc_desc_pool) +
-		ce->guc_id * sizeof(struct guc_lrc_desc);
+		ce->guc_id.id * sizeof(struct guc_lrc_desc);
 	int ret;
 
 	trace_intel_context_register(ce);
 
-	ret = __guc_action_register_context(guc, ce->guc_id, offset, loop);
+	ret = __guc_action_register_context(guc, ce->guc_id.id, offset, loop);
 	if (likely(!ret)) {
 		unsigned long flags;
 
@@ -1390,7 +1390,7 @@ static int guc_lrc_desc_pin(struct intel_context *ce, bool loop)
 	struct intel_engine_cs *engine = ce->engine;
 	struct intel_runtime_pm *runtime_pm = engine->uncore->rpm;
 	struct intel_guc *guc = &engine->gt->uc.guc;
-	u32 desc_idx = ce->guc_id;
+	u32 desc_idx = ce->guc_id.id;
 	struct guc_lrc_desc *desc;
 	bool context_registered;
 	intel_wakeref_t wakeref;
@@ -1453,7 +1453,7 @@ static int guc_lrc_desc_pin(struct intel_context *ce, bool loop)
 		 * context whose guc_id was stolen.
 		 */
 		with_intel_runtime_pm(runtime_pm, wakeref)
-			ret = deregister_context(ce, ce->guc_id);
+			ret = deregister_context(ce, ce->guc_id.id);
 		if (unlikely(ret == -ENODEV))
 			ret = 0;	/* Will get registered later */
 	} else {
@@ -1524,7 +1524,7 @@ static void __guc_context_sched_enable(struct intel_guc *guc,
 {
 	u32 action[] = {
 		INTEL_GUC_ACTION_SCHED_CONTEXT_MODE_SET,
-		ce->guc_id,
+		ce->guc_id.id,
 		GUC_CONTEXT_ENABLE
 	};
 
@@ -1540,7 +1540,7 @@ static void __guc_context_sched_disable(struct intel_guc *guc,
 {
 	u32 action[] = {
 		INTEL_GUC_ACTION_SCHED_CONTEXT_MODE_SET,
-		guc_id,	/* ce->guc_id not stable */
+		guc_id,	/* ce->guc_id.id not stable */
 		GUC_CONTEXT_DISABLE
 	};
 
@@ -1585,7 +1585,7 @@ static u16 prep_context_pending_disable(struct intel_context *ce)
 	guc_blocked_fence_reinit(ce);
 	intel_context_get(ce);
 
-	return ce->guc_id;
+	return ce->guc_id.id;
 }
 
 static struct i915_sw_fence *guc_context_block(struct intel_context *ce)
@@ -1638,7 +1638,7 @@ static bool context_cant_unblock(struct intel_context *ce)
 
 	return (ce->guc_state.sched_state & SCHED_STATE_NO_UNBLOCK) ||
 		context_guc_id_invalid(ce) ||
-		!lrc_desc_registered(ce_to_guc(ce), ce->guc_id) ||
+		!lrc_desc_registered(ce_to_guc(ce), ce->guc_id.id) ||
 		!intel_context_is_pinned(ce);
 }
 
@@ -1757,7 +1757,7 @@ static void guc_context_ban(struct intel_context *ce, struct i915_request *rq)
 		if (!context_guc_id_invalid(ce))
 			with_intel_runtime_pm(runtime_pm, wakeref)
 				__guc_context_set_preemption_timeout(guc,
-								     ce->guc_id,
+								     ce->guc_id.id,
 								     1);
 		spin_unlock_irqrestore(&ce->guc_state.lock, flags);
 	}
@@ -1802,11 +1802,11 @@ static inline void guc_lrc_desc_unpin(struct intel_context *ce)
 {
 	struct intel_guc *guc = ce_to_guc(ce);
 
-	GEM_BUG_ON(!lrc_desc_registered(guc, ce->guc_id));
-	GEM_BUG_ON(ce != __get_context(guc, ce->guc_id));
+	GEM_BUG_ON(!lrc_desc_registered(guc, ce->guc_id.id));
+	GEM_BUG_ON(ce != __get_context(guc, ce->guc_id.id));
 	GEM_BUG_ON(context_enabled(ce));
 
-	deregister_context(ce, ce->guc_id);
+	deregister_context(ce, ce->guc_id.id);
 }
 
 static void __guc_context_destroy(struct intel_context *ce)
@@ -1851,7 +1851,7 @@ static void guc_context_destroy(struct kref *kref)
 		__guc_context_destroy(ce);
 		return;
 	} else if (submission_disabled(guc) ||
-		   !lrc_desc_registered(guc, ce->guc_id)) {
+		   !lrc_desc_registered(guc, ce->guc_id.id)) {
 		release_guc_id(guc, ce);
 		__guc_context_destroy(ce);
 		return;
@@ -1860,10 +1860,10 @@ static void guc_context_destroy(struct kref *kref)
 	/*
 	 * We have to acquire the context spinlock and check guc_id again, if it
 	 * is valid it hasn't been stolen and needs to be deregistered. We
-	 * delete this context from the list of unpinned guc_ids available to
+	 * delete this context from the list of unpinned guc_id available to
 	 * steal to seal a race with guc_lrc_desc_pin(). When the G2H CTB
 	 * returns indicating this context has been deregistered the guc_id is
-	 * returned to the pool of available guc_ids.
+	 * returned to the pool of available guc_id.
 	 */
 	spin_lock_irqsave(&guc->contexts_lock, flags);
 	if (context_guc_id_invalid(ce)) {
@@ -1872,8 +1872,8 @@ static void guc_context_destroy(struct kref *kref)
 		return;
 	}
 
-	if (!list_empty(&ce->guc_id_link))
-		list_del_init(&ce->guc_id_link);
+	if (!list_empty(&ce->guc_id.link))
+		list_del_init(&ce->guc_id.link);
 	spin_unlock_irqrestore(&guc->contexts_lock, flags);
 
 	/* Seal race with Reset */
@@ -1918,7 +1918,7 @@ static void guc_context_set_prio(struct intel_guc *guc,
 {
 	u32 action[] = {
 		INTEL_GUC_ACTION_SET_CONTEXT_PRIORITY,
-		ce->guc_id,
+		ce->guc_id.id,
 		prio,
 	};
 
@@ -2053,7 +2053,7 @@ static void remove_from_context(struct i915_request *rq)
 	decr_context_committed_requests(ce);
 	spin_unlock_irq(&ce->guc_state.lock);
 
-	atomic_dec(&ce->guc_id_ref);
+	atomic_dec(&ce->guc_id.ref);
 	i915_request_notify_execute_cb_imm(rq);
 }
 
@@ -2123,7 +2123,7 @@ static void guc_signal_context_fence(struct intel_context *ce)
 static bool context_needs_register(struct intel_context *ce, bool new_guc_id)
 {
 	return (new_guc_id || test_bit(CONTEXT_LRCA_DIRTY, &ce->flags) ||
-		!lrc_desc_registered(ce_to_guc(ce), ce->guc_id)) &&
+		!lrc_desc_registered(ce_to_guc(ce), ce->guc_id.id)) &&
 		!submission_disabled(ce_to_guc(ce));
 }
 
@@ -2179,11 +2179,11 @@ static int guc_request_alloc(struct i915_request *rq)
 	/*
 	 * Call pin_guc_id here rather than in the pinning step as with
 	 * dma_resv, contexts can be repeatedly pinned / unpinned trashing the
-	 * guc_ids and creating horrible race conditions. This is especially bad
-	 * when guc_ids are being stolen due to over subscription. By the time
+	 * guc_id and creating horrible race conditions. This is especially bad
+	 * when guc_id are being stolen due to over subscription. By the time
 	 * this function is reached, it is guaranteed that the guc_id will be
 	 * persistent until the generated request is retired. Thus, sealing these
-	 * race conditions. It is still safe to fail here if guc_ids are
+	 * race conditions. It is still safe to fail here if guc_id are
 	 * exhausted and return -EAGAIN to the user indicating that they can try
 	 * again in the future.
 	 *
@@ -2193,7 +2193,7 @@ static int guc_request_alloc(struct i915_request *rq)
 	 * decremented on each retire. When it is zero, a lock around the
 	 * increment (in pin_guc_id) is needed to seal a race with unpin_guc_id.
 	 */
-	if (atomic_add_unless(&ce->guc_id_ref, 1, 0))
+	if (atomic_add_unless(&ce->guc_id.ref, 1, 0))
 		goto out;
 
 	ret = pin_guc_id(guc, ce);	/* returns 1 if new guc_id assigned */
@@ -2206,7 +2206,7 @@ static int guc_request_alloc(struct i915_request *rq)
 				disable_submission(guc);
 				goto out;	/* GPU will be reset */
 			}
-			atomic_dec(&ce->guc_id_ref);
+			atomic_dec(&ce->guc_id.ref);
 			unpin_guc_id(guc, ce);
 			return ret;
 		}
@@ -3040,7 +3040,7 @@ void intel_guc_submission_print_info(struct intel_guc *guc,
 
 		priolist_for_each_request(rq, pl)
 			drm_printf(p, "guc_id=%u, seqno=%llu\n",
-				   rq->context->guc_id,
+				   rq->context->guc_id.id,
 				   rq->fence.seqno);
 	}
 	spin_unlock_irqrestore(&sched_engine->lock, flags);
@@ -3071,7 +3071,7 @@ void intel_guc_submission_print_context_info(struct intel_guc *guc,
 
 	xa_lock_irqsave(&guc->context_lookup, flags);
 	xa_for_each(&guc->context_lookup, index, ce) {
-		drm_printf(p, "GuC lrc descriptor %u:\n", ce->guc_id);
+		drm_printf(p, "GuC lrc descriptor %u:\n", ce->guc_id.id);
 		drm_printf(p, "\tHW Context Desc: 0x%08x\n", ce->lrc.lrca);
 		drm_printf(p, "\t\tLRC Head: Internal %u, Memory %u\n",
 			   ce->ring->head,
@@ -3082,7 +3082,7 @@ void intel_guc_submission_print_context_info(struct intel_guc *guc,
 		drm_printf(p, "\t\tContext Pin Count: %u\n",
 			   atomic_read(&ce->pin_count));
 		drm_printf(p, "\t\tGuC ID Ref Count: %u\n",
-			   atomic_read(&ce->guc_id_ref));
+			   atomic_read(&ce->guc_id.ref));
 		drm_printf(p, "\t\tSchedule State: 0x%x\n\n",
 			   ce->guc_state.sched_state);
 
diff --git a/drivers/gpu/drm/i915/i915_trace.h b/drivers/gpu/drm/i915/i915_trace.h
index 181c5831405b..75a40a33e13a 100644
--- a/drivers/gpu/drm/i915/i915_trace.h
+++ b/drivers/gpu/drm/i915/i915_trace.h
@@ -805,7 +805,7 @@ DECLARE_EVENT_CLASS(i915_request,
 			   __entry->dev = rq->engine->i915->drm.primary->index;
 			   __entry->class = rq->engine->uabi_class;
 			   __entry->instance = rq->engine->uabi_instance;
-			   __entry->guc_id = rq->context->guc_id;
+			   __entry->guc_id = rq->context->guc_id.id;
 			   __entry->ctx = rq->fence.context;
 			   __entry->seqno = rq->fence.seqno;
 			   __entry->tail = rq->tail;
@@ -907,7 +907,7 @@ DECLARE_EVENT_CLASS(intel_context,
 			     ),
 
 		    TP_fast_assign(
-			   __entry->guc_id = ce->guc_id;
+			   __entry->guc_id = ce->guc_id.id;
 			   __entry->pin_count = atomic_read(&ce->pin_count);
 			   __entry->sched_state = ce->guc_state.sched_state;
 			   __entry->guc_prio = ce->guc_active.prio;
-- 
2.32.0

[PATCH 22/23] drm/i915/guc: Drop guc_active move everything into guc_state

[Matthew Brost]

Now that we have locking hierarchy of sched_engine->lock ->
ce->guc_state everything from guc_active can be moved into guc_state and
protected the guc_state.lock.

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
---
 drivers/gpu/drm/i915/gt/intel_context.c       | 10 +--
 drivers/gpu/drm/i915/gt/intel_context_types.h |  7 +-
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 88 +++++++++----------
 drivers/gpu/drm/i915/i915_trace.h             |  2 +-
 4 files changed, 49 insertions(+), 58 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_context.c b/drivers/gpu/drm/i915/gt/intel_context.c
index 485460a11331..ff637147b1a9 100644
--- a/drivers/gpu/drm/i915/gt/intel_context.c
+++ b/drivers/gpu/drm/i915/gt/intel_context.c
@@ -394,9 +394,7 @@ intel_context_init(struct intel_context *ce, struct intel_engine_cs *engine)
 
 	spin_lock_init(&ce->guc_state.lock);
 	INIT_LIST_HEAD(&ce->guc_state.fences);
-
-	spin_lock_init(&ce->guc_active.lock);
-	INIT_LIST_HEAD(&ce->guc_active.requests);
+	INIT_LIST_HEAD(&ce->guc_state.requests);
 
 	ce->guc_id.id = GUC_INVALID_LRC_ID;
 	INIT_LIST_HEAD(&ce->guc_id.link);
@@ -521,15 +519,15 @@ struct i915_request *intel_context_find_active_request(struct intel_context *ce)
 
 	GEM_BUG_ON(!intel_engine_uses_guc(ce->engine));
 
-	spin_lock_irqsave(&ce->guc_active.lock, flags);
-	list_for_each_entry_reverse(rq, &ce->guc_active.requests,
+	spin_lock_irqsave(&ce->guc_state.lock, flags);
+	list_for_each_entry_reverse(rq, &ce->guc_state.requests,
 				    sched.link) {
 		if (i915_request_completed(rq))
 			break;
 
 		active = rq;
 	}
-	spin_unlock_irqrestore(&ce->guc_active.lock, flags);
+	spin_unlock_irqrestore(&ce->guc_state.lock, flags);
 
 	return active;
 }
diff --git a/drivers/gpu/drm/i915/gt/intel_context_types.h b/drivers/gpu/drm/i915/gt/intel_context_types.h
index 0b00d249c884..5285d660eacf 100644
--- a/drivers/gpu/drm/i915/gt/intel_context_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_context_types.h
@@ -172,11 +172,6 @@ struct intel_context {
 		struct i915_sw_fence blocked;
 		/* GuC committed requests */
 		int number_committed_requests;
-	} guc_state;
-
-	struct {
-		/** lock: protects everything in guc_active */
-		spinlock_t lock;
 		/** requests: active requests on this context */
 		struct list_head requests;
 		/*
@@ -184,7 +179,7 @@ struct intel_context {
 		 */
 		u8 prio;
 		u32 prio_count[GUC_CLIENT_PRIORITY_NUM];
-	} guc_active;
+	} guc_state;
 
 	struct {
 		/* GuC LRC descriptor ID */
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 2c9a6b4ce071..a9cf49298067 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -846,9 +846,9 @@ __unwind_incomplete_requests(struct intel_context *ce)
 	unsigned long flags;
 
 	spin_lock_irqsave(&sched_engine->lock, flags);
-	spin_lock(&ce->guc_active.lock);
+	spin_lock(&ce->guc_state.lock);
 	list_for_each_entry_safe_reverse(rq, rn,
-					 &ce->guc_active.requests,
+					 &ce->guc_state.requests,
 					 sched.link) {
 		if (i915_request_completed(rq))
 			continue;
@@ -867,7 +867,7 @@ __unwind_incomplete_requests(struct intel_context *ce)
 		list_add(&rq->sched.link, pl);
 		set_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags);
 	}
-	spin_unlock(&ce->guc_active.lock);
+	spin_unlock(&ce->guc_state.lock);
 	spin_unlock_irqrestore(&sched_engine->lock, flags);
 }
 
@@ -962,10 +962,10 @@ static void guc_cancel_context_requests(struct intel_context *ce)
 
 	/* Mark all executing requests as skipped. */
 	spin_lock_irqsave(&sched_engine->lock, flags);
-	spin_lock(&ce->guc_active.lock);
-	list_for_each_entry(rq, &ce->guc_active.requests, sched.link)
+	spin_lock(&ce->guc_state.lock);
+	list_for_each_entry(rq, &ce->guc_state.requests, sched.link)
 		i915_request_put(i915_request_mark_eio(rq));
-	spin_unlock(&ce->guc_active.lock);
+	spin_unlock(&ce->guc_state.lock);
 	spin_unlock_irqrestore(&sched_engine->lock, flags);
 }
 
@@ -1416,7 +1416,7 @@ static int guc_lrc_desc_pin(struct intel_context *ce, bool loop)
 	desc->engine_submit_mask = adjust_engine_mask(engine->class,
 						      engine->mask);
 	desc->hw_context_desc = ce->lrc.lrca;
-	desc->priority = ce->guc_active.prio;
+	desc->priority = ce->guc_state.prio;
 	desc->context_flags = CONTEXT_REGISTRATION_FLAG_KMD;
 	guc_context_policy_init(engine, desc);
 
@@ -1811,10 +1811,10 @@ static inline void guc_lrc_desc_unpin(struct intel_context *ce)
 
 static void __guc_context_destroy(struct intel_context *ce)
 {
-	GEM_BUG_ON(ce->guc_active.prio_count[GUC_CLIENT_PRIORITY_KMD_HIGH] ||
-		   ce->guc_active.prio_count[GUC_CLIENT_PRIORITY_HIGH] ||
-		   ce->guc_active.prio_count[GUC_CLIENT_PRIORITY_KMD_NORMAL] ||
-		   ce->guc_active.prio_count[GUC_CLIENT_PRIORITY_NORMAL]);
+	GEM_BUG_ON(ce->guc_state.prio_count[GUC_CLIENT_PRIORITY_KMD_HIGH] ||
+		   ce->guc_state.prio_count[GUC_CLIENT_PRIORITY_HIGH] ||
+		   ce->guc_state.prio_count[GUC_CLIENT_PRIORITY_KMD_NORMAL] ||
+		   ce->guc_state.prio_count[GUC_CLIENT_PRIORITY_NORMAL]);
 	GEM_BUG_ON(ce->guc_state.number_committed_requests);
 
 	lrc_fini(ce);
@@ -1924,17 +1924,17 @@ static void guc_context_set_prio(struct intel_guc *guc,
 
 	GEM_BUG_ON(prio < GUC_CLIENT_PRIORITY_KMD_HIGH ||
 		   prio > GUC_CLIENT_PRIORITY_NORMAL);
-	lockdep_assert_held(&ce->guc_active.lock);
+	lockdep_assert_held(&ce->guc_state.lock);
 
-	if (ce->guc_active.prio == prio || submission_disabled(guc) ||
+	if (ce->guc_state.prio == prio || submission_disabled(guc) ||
 	    !context_registered(ce)) {
-		ce->guc_active.prio = prio;
+		ce->guc_state.prio = prio;
 		return;
 	}
 
 	guc_submission_send_busy_loop(guc, action, ARRAY_SIZE(action), 0, true);
 
-	ce->guc_active.prio = prio;
+	ce->guc_state.prio = prio;
 	trace_intel_context_set_prio(ce);
 }
 
@@ -1953,25 +1953,25 @@ static inline u8 map_i915_prio_to_guc_prio(int prio)
 static inline void add_context_inflight_prio(struct intel_context *ce,
 					     u8 guc_prio)
 {
-	lockdep_assert_held(&ce->guc_active.lock);
-	GEM_BUG_ON(guc_prio >= ARRAY_SIZE(ce->guc_active.prio_count));
+	lockdep_assert_held(&ce->guc_state.lock);
+	GEM_BUG_ON(guc_prio >= ARRAY_SIZE(ce->guc_state.prio_count));
 
-	++ce->guc_active.prio_count[guc_prio];
+	++ce->guc_state.prio_count[guc_prio];
 
 	/* Overflow protection */
-	GEM_WARN_ON(!ce->guc_active.prio_count[guc_prio]);
+	GEM_WARN_ON(!ce->guc_state.prio_count[guc_prio]);
 }
 
 static inline void sub_context_inflight_prio(struct intel_context *ce,
 					     u8 guc_prio)
 {
-	lockdep_assert_held(&ce->guc_active.lock);
-	GEM_BUG_ON(guc_prio >= ARRAY_SIZE(ce->guc_active.prio_count));
+	lockdep_assert_held(&ce->guc_state.lock);
+	GEM_BUG_ON(guc_prio >= ARRAY_SIZE(ce->guc_state.prio_count));
 
 	/* Underflow protection */
-	GEM_WARN_ON(!ce->guc_active.prio_count[guc_prio]);
+	GEM_WARN_ON(!ce->guc_state.prio_count[guc_prio]);
 
-	--ce->guc_active.prio_count[guc_prio];
+	--ce->guc_state.prio_count[guc_prio];
 }
 
 static inline void update_context_prio(struct intel_context *ce)
@@ -1982,10 +1982,10 @@ static inline void update_context_prio(struct intel_context *ce)
 	BUILD_BUG_ON(GUC_CLIENT_PRIORITY_KMD_HIGH != 0);
 	BUILD_BUG_ON(GUC_CLIENT_PRIORITY_KMD_HIGH > GUC_CLIENT_PRIORITY_NORMAL);
 
-	lockdep_assert_held(&ce->guc_active.lock);
+	lockdep_assert_held(&ce->guc_state.lock);
 
-	for (i = 0; i < ARRAY_SIZE(ce->guc_active.prio_count); ++i) {
-		if (ce->guc_active.prio_count[i]) {
+	for (i = 0; i < ARRAY_SIZE(ce->guc_state.prio_count); ++i) {
+		if (ce->guc_state.prio_count[i]) {
 			guc_context_set_prio(guc, ce, i);
 			break;
 		}
@@ -2005,8 +2005,8 @@ static void add_to_context(struct i915_request *rq)
 
 	GEM_BUG_ON(rq->guc_prio == GUC_PRIO_FINI);
 
-	spin_lock(&ce->guc_active.lock);
-	list_move_tail(&rq->sched.link, &ce->guc_active.requests);
+	spin_lock(&ce->guc_state.lock);
+	list_move_tail(&rq->sched.link, &ce->guc_state.requests);
 
 	if (rq->guc_prio == GUC_PRIO_INIT) {
 		rq->guc_prio = new_guc_prio;
@@ -2018,12 +2018,12 @@ static void add_to_context(struct i915_request *rq)
 	}
 	update_context_prio(ce);
 
-	spin_unlock(&ce->guc_active.lock);
+	spin_unlock(&ce->guc_state.lock);
 }
 
 static void guc_prio_fini(struct i915_request *rq, struct intel_context *ce)
 {
-	lockdep_assert_held(&ce->guc_active.lock);
+	lockdep_assert_held(&ce->guc_state.lock);
 
 	if (rq->guc_prio != GUC_PRIO_INIT &&
 	    rq->guc_prio != GUC_PRIO_FINI) {
@@ -2037,7 +2037,7 @@ static void remove_from_context(struct i915_request *rq)
 {
 	struct intel_context *ce = rq->context;
 
-	spin_lock_irq(&ce->guc_active.lock);
+	spin_lock_irq(&ce->guc_state.lock);
 
 	list_del_init(&rq->sched.link);
 	clear_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags);
@@ -2047,10 +2047,8 @@ static void remove_from_context(struct i915_request *rq)
 
 	guc_prio_fini(rq, ce);
 
-	spin_unlock_irq(&ce->guc_active.lock);
-
-	spin_lock_irq(&ce->guc_state.lock);
 	decr_context_committed_requests(ce);
+
 	spin_unlock_irq(&ce->guc_state.lock);
 
 	atomic_dec(&ce->guc_id.ref);
@@ -2138,7 +2136,7 @@ static void guc_context_init(struct intel_context *ce)
 		prio = ctx->sched.priority;
 	rcu_read_unlock();
 
-	ce->guc_active.prio = map_i915_prio_to_guc_prio(prio);
+	ce->guc_state.prio = map_i915_prio_to_guc_prio(prio);
 	set_bit(CONTEXT_GUC_INIT, &ce->flags);
 }
 
@@ -2372,7 +2370,7 @@ static void guc_bump_inflight_request_prio(struct i915_request *rq,
 	     !new_guc_prio_higher(rq->guc_prio, new_guc_prio)))
 		return;
 
-	spin_lock(&ce->guc_active.lock);
+	spin_lock(&ce->guc_state.lock);
 	if (rq->guc_prio != GUC_PRIO_FINI) {
 		if (rq->guc_prio != GUC_PRIO_INIT)
 			sub_context_inflight_prio(ce, rq->guc_prio);
@@ -2380,16 +2378,16 @@ static void guc_bump_inflight_request_prio(struct i915_request *rq,
 		add_context_inflight_prio(ce, rq->guc_prio);
 		update_context_prio(ce);
 	}
-	spin_unlock(&ce->guc_active.lock);
+	spin_unlock(&ce->guc_state.lock);
 }
 
 static void guc_retire_inflight_request_prio(struct i915_request *rq)
 {
 	struct intel_context *ce = rq->context;
 
-	spin_lock(&ce->guc_active.lock);
+	spin_lock(&ce->guc_state.lock);
 	guc_prio_fini(rq, ce);
-	spin_unlock(&ce->guc_active.lock);
+	spin_unlock(&ce->guc_state.lock);
 }
 
 static void sanitize_hwsp(struct intel_engine_cs *engine)
@@ -2955,7 +2953,7 @@ void intel_guc_find_hung_context(struct intel_engine_cs *engine)
 				goto next;
 		}
 
-		list_for_each_entry(rq, &ce->guc_active.requests, sched.link) {
+		list_for_each_entry(rq, &ce->guc_state.requests, sched.link) {
 			if (i915_test_request_state(rq) != I915_REQUEST_ACTIVE)
 				continue;
 
@@ -3005,10 +3003,10 @@ void intel_guc_dump_active_requests(struct intel_engine_cs *engine,
 				goto next;
 		}
 
-		spin_lock(&ce->guc_active.lock);
-		intel_engine_dump_active_requests(&ce->guc_active.requests,
+		spin_lock(&ce->guc_state.lock);
+		intel_engine_dump_active_requests(&ce->guc_state.requests,
 						  hung_rq, m);
-		spin_unlock(&ce->guc_active.lock);
+		spin_unlock(&ce->guc_state.lock);
 
 next:
 		intel_context_put(ce);
@@ -3052,12 +3050,12 @@ static inline void guc_log_context_priority(struct drm_printer *p,
 {
 	int i;
 
-	drm_printf(p, "\t\tPriority: %d\n", ce->guc_active.prio);
+	drm_printf(p, "\t\tPriority: %d\n", ce->guc_state.prio);
 	drm_printf(p, "\t\tNumber Requests (lower index == higher priority)\n");
 	for (i = GUC_CLIENT_PRIORITY_KMD_HIGH;
 	     i < GUC_CLIENT_PRIORITY_NUM; ++i) {
 		drm_printf(p, "\t\tNumber requests in priority band[%d]: %d\n",
-			   i, ce->guc_active.prio_count[i]);
+			   i, ce->guc_state.prio_count[i]);
 	}
 	drm_printf(p, "\n");
 }
diff --git a/drivers/gpu/drm/i915/i915_trace.h b/drivers/gpu/drm/i915/i915_trace.h
index 75a40a33e13a..9795f456cccf 100644
--- a/drivers/gpu/drm/i915/i915_trace.h
+++ b/drivers/gpu/drm/i915/i915_trace.h
@@ -910,7 +910,7 @@ DECLARE_EVENT_CLASS(intel_context,
 			   __entry->guc_id = ce->guc_id.id;
 			   __entry->pin_count = atomic_read(&ce->pin_count);
 			   __entry->sched_state = ce->guc_state.sched_state;
-			   __entry->guc_prio = ce->guc_active.prio;
+			   __entry->guc_prio = ce->guc_state.prio;
 			   ),
 
 		    TP_printk("guc_id=%d, pin_count=%d sched_state=0x%x, guc_prio=%u",
-- 
2.32.0

[Intel-gfx] [PATCH 22/23] drm/i915/guc: Drop guc_active move everything into guc_state

[Matthew Brost]

Now that we have locking hierarchy of sched_engine->lock ->
ce->guc_state everything from guc_active can be moved into guc_state and
protected the guc_state.lock.

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
---
 drivers/gpu/drm/i915/gt/intel_context.c       | 10 +--
 drivers/gpu/drm/i915/gt/intel_context_types.h |  7 +-
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 88 +++++++++----------
 drivers/gpu/drm/i915/i915_trace.h             |  2 +-
 4 files changed, 49 insertions(+), 58 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_context.c b/drivers/gpu/drm/i915/gt/intel_context.c
index 485460a11331..ff637147b1a9 100644
--- a/drivers/gpu/drm/i915/gt/intel_context.c
+++ b/drivers/gpu/drm/i915/gt/intel_context.c
@@ -394,9 +394,7 @@ intel_context_init(struct intel_context *ce, struct intel_engine_cs *engine)
 
 	spin_lock_init(&ce->guc_state.lock);
 	INIT_LIST_HEAD(&ce->guc_state.fences);
-
-	spin_lock_init(&ce->guc_active.lock);
-	INIT_LIST_HEAD(&ce->guc_active.requests);
+	INIT_LIST_HEAD(&ce->guc_state.requests);
 
 	ce->guc_id.id = GUC_INVALID_LRC_ID;
 	INIT_LIST_HEAD(&ce->guc_id.link);
@@ -521,15 +519,15 @@ struct i915_request *intel_context_find_active_request(struct intel_context *ce)
 
 	GEM_BUG_ON(!intel_engine_uses_guc(ce->engine));
 
-	spin_lock_irqsave(&ce->guc_active.lock, flags);
-	list_for_each_entry_reverse(rq, &ce->guc_active.requests,
+	spin_lock_irqsave(&ce->guc_state.lock, flags);
+	list_for_each_entry_reverse(rq, &ce->guc_state.requests,
 				    sched.link) {
 		if (i915_request_completed(rq))
 			break;
 
 		active = rq;
 	}
-	spin_unlock_irqrestore(&ce->guc_active.lock, flags);
+	spin_unlock_irqrestore(&ce->guc_state.lock, flags);
 
 	return active;
 }
diff --git a/drivers/gpu/drm/i915/gt/intel_context_types.h b/drivers/gpu/drm/i915/gt/intel_context_types.h
index 0b00d249c884..5285d660eacf 100644
--- a/drivers/gpu/drm/i915/gt/intel_context_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_context_types.h
@@ -172,11 +172,6 @@ struct intel_context {
 		struct i915_sw_fence blocked;
 		/* GuC committed requests */
 		int number_committed_requests;
-	} guc_state;
-
-	struct {
-		/** lock: protects everything in guc_active */
-		spinlock_t lock;
 		/** requests: active requests on this context */
 		struct list_head requests;
 		/*
@@ -184,7 +179,7 @@ struct intel_context {
 		 */
 		u8 prio;
 		u32 prio_count[GUC_CLIENT_PRIORITY_NUM];
-	} guc_active;
+	} guc_state;
 
 	struct {
 		/* GuC LRC descriptor ID */
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 2c9a6b4ce071..a9cf49298067 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -846,9 +846,9 @@ __unwind_incomplete_requests(struct intel_context *ce)
 	unsigned long flags;
 
 	spin_lock_irqsave(&sched_engine->lock, flags);
-	spin_lock(&ce->guc_active.lock);
+	spin_lock(&ce->guc_state.lock);
 	list_for_each_entry_safe_reverse(rq, rn,
-					 &ce->guc_active.requests,
+					 &ce->guc_state.requests,
 					 sched.link) {
 		if (i915_request_completed(rq))
 			continue;
@@ -867,7 +867,7 @@ __unwind_incomplete_requests(struct intel_context *ce)
 		list_add(&rq->sched.link, pl);
 		set_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags);
 	}
-	spin_unlock(&ce->guc_active.lock);
+	spin_unlock(&ce->guc_state.lock);
 	spin_unlock_irqrestore(&sched_engine->lock, flags);
 }
 
@@ -962,10 +962,10 @@ static void guc_cancel_context_requests(struct intel_context *ce)
 
 	/* Mark all executing requests as skipped. */
 	spin_lock_irqsave(&sched_engine->lock, flags);
-	spin_lock(&ce->guc_active.lock);
-	list_for_each_entry(rq, &ce->guc_active.requests, sched.link)
+	spin_lock(&ce->guc_state.lock);
+	list_for_each_entry(rq, &ce->guc_state.requests, sched.link)
 		i915_request_put(i915_request_mark_eio(rq));
-	spin_unlock(&ce->guc_active.lock);
+	spin_unlock(&ce->guc_state.lock);
 	spin_unlock_irqrestore(&sched_engine->lock, flags);
 }
 
@@ -1416,7 +1416,7 @@ static int guc_lrc_desc_pin(struct intel_context *ce, bool loop)
 	desc->engine_submit_mask = adjust_engine_mask(engine->class,
 						      engine->mask);
 	desc->hw_context_desc = ce->lrc.lrca;
-	desc->priority = ce->guc_active.prio;
+	desc->priority = ce->guc_state.prio;
 	desc->context_flags = CONTEXT_REGISTRATION_FLAG_KMD;
 	guc_context_policy_init(engine, desc);
 
@@ -1811,10 +1811,10 @@ static inline void guc_lrc_desc_unpin(struct intel_context *ce)
 
 static void __guc_context_destroy(struct intel_context *ce)
 {
-	GEM_BUG_ON(ce->guc_active.prio_count[GUC_CLIENT_PRIORITY_KMD_HIGH] ||
-		   ce->guc_active.prio_count[GUC_CLIENT_PRIORITY_HIGH] ||
-		   ce->guc_active.prio_count[GUC_CLIENT_PRIORITY_KMD_NORMAL] ||
-		   ce->guc_active.prio_count[GUC_CLIENT_PRIORITY_NORMAL]);
+	GEM_BUG_ON(ce->guc_state.prio_count[GUC_CLIENT_PRIORITY_KMD_HIGH] ||
+		   ce->guc_state.prio_count[GUC_CLIENT_PRIORITY_HIGH] ||
+		   ce->guc_state.prio_count[GUC_CLIENT_PRIORITY_KMD_NORMAL] ||
+		   ce->guc_state.prio_count[GUC_CLIENT_PRIORITY_NORMAL]);
 	GEM_BUG_ON(ce->guc_state.number_committed_requests);
 
 	lrc_fini(ce);
@@ -1924,17 +1924,17 @@ static void guc_context_set_prio(struct intel_guc *guc,
 
 	GEM_BUG_ON(prio < GUC_CLIENT_PRIORITY_KMD_HIGH ||
 		   prio > GUC_CLIENT_PRIORITY_NORMAL);
-	lockdep_assert_held(&ce->guc_active.lock);
+	lockdep_assert_held(&ce->guc_state.lock);
 
-	if (ce->guc_active.prio == prio || submission_disabled(guc) ||
+	if (ce->guc_state.prio == prio || submission_disabled(guc) ||
 	    !context_registered(ce)) {
-		ce->guc_active.prio = prio;
+		ce->guc_state.prio = prio;
 		return;
 	}
 
 	guc_submission_send_busy_loop(guc, action, ARRAY_SIZE(action), 0, true);
 
-	ce->guc_active.prio = prio;
+	ce->guc_state.prio = prio;
 	trace_intel_context_set_prio(ce);
 }
 
@@ -1953,25 +1953,25 @@ static inline u8 map_i915_prio_to_guc_prio(int prio)
 static inline void add_context_inflight_prio(struct intel_context *ce,
 					     u8 guc_prio)
 {
-	lockdep_assert_held(&ce->guc_active.lock);
-	GEM_BUG_ON(guc_prio >= ARRAY_SIZE(ce->guc_active.prio_count));
+	lockdep_assert_held(&ce->guc_state.lock);
+	GEM_BUG_ON(guc_prio >= ARRAY_SIZE(ce->guc_state.prio_count));
 
-	++ce->guc_active.prio_count[guc_prio];
+	++ce->guc_state.prio_count[guc_prio];
 
 	/* Overflow protection */
-	GEM_WARN_ON(!ce->guc_active.prio_count[guc_prio]);
+	GEM_WARN_ON(!ce->guc_state.prio_count[guc_prio]);
 }
 
 static inline void sub_context_inflight_prio(struct intel_context *ce,
 					     u8 guc_prio)
 {
-	lockdep_assert_held(&ce->guc_active.lock);
-	GEM_BUG_ON(guc_prio >= ARRAY_SIZE(ce->guc_active.prio_count));
+	lockdep_assert_held(&ce->guc_state.lock);
+	GEM_BUG_ON(guc_prio >= ARRAY_SIZE(ce->guc_state.prio_count));
 
 	/* Underflow protection */
-	GEM_WARN_ON(!ce->guc_active.prio_count[guc_prio]);
+	GEM_WARN_ON(!ce->guc_state.prio_count[guc_prio]);
 
-	--ce->guc_active.prio_count[guc_prio];
+	--ce->guc_state.prio_count[guc_prio];
 }
 
 static inline void update_context_prio(struct intel_context *ce)
@@ -1982,10 +1982,10 @@ static inline void update_context_prio(struct intel_context *ce)
 	BUILD_BUG_ON(GUC_CLIENT_PRIORITY_KMD_HIGH != 0);
 	BUILD_BUG_ON(GUC_CLIENT_PRIORITY_KMD_HIGH > GUC_CLIENT_PRIORITY_NORMAL);
 
-	lockdep_assert_held(&ce->guc_active.lock);
+	lockdep_assert_held(&ce->guc_state.lock);
 
-	for (i = 0; i < ARRAY_SIZE(ce->guc_active.prio_count); ++i) {
-		if (ce->guc_active.prio_count[i]) {
+	for (i = 0; i < ARRAY_SIZE(ce->guc_state.prio_count); ++i) {
+		if (ce->guc_state.prio_count[i]) {
 			guc_context_set_prio(guc, ce, i);
 			break;
 		}
@@ -2005,8 +2005,8 @@ static void add_to_context(struct i915_request *rq)
 
 	GEM_BUG_ON(rq->guc_prio == GUC_PRIO_FINI);
 
-	spin_lock(&ce->guc_active.lock);
-	list_move_tail(&rq->sched.link, &ce->guc_active.requests);
+	spin_lock(&ce->guc_state.lock);
+	list_move_tail(&rq->sched.link, &ce->guc_state.requests);
 
 	if (rq->guc_prio == GUC_PRIO_INIT) {
 		rq->guc_prio = new_guc_prio;
@@ -2018,12 +2018,12 @@ static void add_to_context(struct i915_request *rq)
 	}
 	update_context_prio(ce);
 
-	spin_unlock(&ce->guc_active.lock);
+	spin_unlock(&ce->guc_state.lock);
 }
 
 static void guc_prio_fini(struct i915_request *rq, struct intel_context *ce)
 {
-	lockdep_assert_held(&ce->guc_active.lock);
+	lockdep_assert_held(&ce->guc_state.lock);
 
 	if (rq->guc_prio != GUC_PRIO_INIT &&
 	    rq->guc_prio != GUC_PRIO_FINI) {
@@ -2037,7 +2037,7 @@ static void remove_from_context(struct i915_request *rq)
 {
 	struct intel_context *ce = rq->context;
 
-	spin_lock_irq(&ce->guc_active.lock);
+	spin_lock_irq(&ce->guc_state.lock);
 
 	list_del_init(&rq->sched.link);
 	clear_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags);
@@ -2047,10 +2047,8 @@ static void remove_from_context(struct i915_request *rq)
 
 	guc_prio_fini(rq, ce);
 
-	spin_unlock_irq(&ce->guc_active.lock);
-
-	spin_lock_irq(&ce->guc_state.lock);
 	decr_context_committed_requests(ce);
+
 	spin_unlock_irq(&ce->guc_state.lock);
 
 	atomic_dec(&ce->guc_id.ref);
@@ -2138,7 +2136,7 @@ static void guc_context_init(struct intel_context *ce)
 		prio = ctx->sched.priority;
 	rcu_read_unlock();
 
-	ce->guc_active.prio = map_i915_prio_to_guc_prio(prio);
+	ce->guc_state.prio = map_i915_prio_to_guc_prio(prio);
 	set_bit(CONTEXT_GUC_INIT, &ce->flags);
 }
 
@@ -2372,7 +2370,7 @@ static void guc_bump_inflight_request_prio(struct i915_request *rq,
 	     !new_guc_prio_higher(rq->guc_prio, new_guc_prio)))
 		return;
 
-	spin_lock(&ce->guc_active.lock);
+	spin_lock(&ce->guc_state.lock);
 	if (rq->guc_prio != GUC_PRIO_FINI) {
 		if (rq->guc_prio != GUC_PRIO_INIT)
 			sub_context_inflight_prio(ce, rq->guc_prio);
@@ -2380,16 +2378,16 @@ static void guc_bump_inflight_request_prio(struct i915_request *rq,
 		add_context_inflight_prio(ce, rq->guc_prio);
 		update_context_prio(ce);
 	}
-	spin_unlock(&ce->guc_active.lock);
+	spin_unlock(&ce->guc_state.lock);
 }
 
 static void guc_retire_inflight_request_prio(struct i915_request *rq)
 {
 	struct intel_context *ce = rq->context;
 
-	spin_lock(&ce->guc_active.lock);
+	spin_lock(&ce->guc_state.lock);
 	guc_prio_fini(rq, ce);
-	spin_unlock(&ce->guc_active.lock);
+	spin_unlock(&ce->guc_state.lock);
 }
 
 static void sanitize_hwsp(struct intel_engine_cs *engine)
@@ -2955,7 +2953,7 @@ void intel_guc_find_hung_context(struct intel_engine_cs *engine)
 				goto next;
 		}
 
-		list_for_each_entry(rq, &ce->guc_active.requests, sched.link) {
+		list_for_each_entry(rq, &ce->guc_state.requests, sched.link) {
 			if (i915_test_request_state(rq) != I915_REQUEST_ACTIVE)
 				continue;
 
@@ -3005,10 +3003,10 @@ void intel_guc_dump_active_requests(struct intel_engine_cs *engine,
 				goto next;
 		}
 
-		spin_lock(&ce->guc_active.lock);
-		intel_engine_dump_active_requests(&ce->guc_active.requests,
+		spin_lock(&ce->guc_state.lock);
+		intel_engine_dump_active_requests(&ce->guc_state.requests,
 						  hung_rq, m);
-		spin_unlock(&ce->guc_active.lock);
+		spin_unlock(&ce->guc_state.lock);
 
 next:
 		intel_context_put(ce);
@@ -3052,12 +3050,12 @@ static inline void guc_log_context_priority(struct drm_printer *p,
 {
 	int i;
 
-	drm_printf(p, "\t\tPriority: %d\n", ce->guc_active.prio);
+	drm_printf(p, "\t\tPriority: %d\n", ce->guc_state.prio);
 	drm_printf(p, "\t\tNumber Requests (lower index == higher priority)\n");
 	for (i = GUC_CLIENT_PRIORITY_KMD_HIGH;
 	     i < GUC_CLIENT_PRIORITY_NUM; ++i) {
 		drm_printf(p, "\t\tNumber requests in priority band[%d]: %d\n",
-			   i, ce->guc_active.prio_count[i]);
+			   i, ce->guc_state.prio_count[i]);
 	}
 	drm_printf(p, "\n");
 }
diff --git a/drivers/gpu/drm/i915/i915_trace.h b/drivers/gpu/drm/i915/i915_trace.h
index 75a40a33e13a..9795f456cccf 100644
--- a/drivers/gpu/drm/i915/i915_trace.h
+++ b/drivers/gpu/drm/i915/i915_trace.h
@@ -910,7 +910,7 @@ DECLARE_EVENT_CLASS(intel_context,
 			   __entry->guc_id = ce->guc_id.id;
 			   __entry->pin_count = atomic_read(&ce->pin_count);
 			   __entry->sched_state = ce->guc_state.sched_state;
-			   __entry->guc_prio = ce->guc_active.prio;
+			   __entry->guc_prio = ce->guc_state.prio;
 			   ),
 
 		    TP_printk("guc_id=%d, pin_count=%d sched_state=0x%x, guc_prio=%u",
-- 
2.32.0

[PATCH 23/23] drm/i915/guc: Add GuC kernel doc

[Matthew Brost]

Add GuC kernel doc for all structures added thus far for GuC submission
and update the main GuC submission section with the new interface
details.

v2:
 - Drop guc_active.lock DOC
v3:
 - Fixup a few kernel doc comments (Daniele)
v4 (Daniele):
 - Implement doc suggestions from John
 - Add kerneldoc for all members of the GuC structure and pull the file
   in i915.rst
v5 (Daniele):
 - Implement new doc suggestions from John

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: John Harrison <John.C.Harrison@Intel.com>
---
 Documentation/gpu/i915.rst                    |   2 +
 drivers/gpu/drm/i915/gt/intel_context_types.h |  43 +++++---
 drivers/gpu/drm/i915/gt/uc/intel_guc.h        |  75 ++++++++++---
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 100 ++++++++++++++----
 drivers/gpu/drm/i915/i915_request.h           |  21 ++--
 5 files changed, 181 insertions(+), 60 deletions(-)

diff --git a/Documentation/gpu/i915.rst b/Documentation/gpu/i915.rst
index 101dde3eb1ea..311e10400708 100644
--- a/Documentation/gpu/i915.rst
+++ b/Documentation/gpu/i915.rst
@@ -495,6 +495,8 @@ GuC
 .. kernel-doc:: drivers/gpu/drm/i915/gt/uc/intel_guc.c
    :doc: GuC
 
+.. kernel-doc:: drivers/gpu/drm/i915/gt/uc/intel_guc.h
+
 GuC Firmware Layout
 ~~~~~~~~~~~~~~~~~~~
 
diff --git a/drivers/gpu/drm/i915/gt/intel_context_types.h b/drivers/gpu/drm/i915/gt/intel_context_types.h
index 5285d660eacf..930569a1a01f 100644
--- a/drivers/gpu/drm/i915/gt/intel_context_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_context_types.h
@@ -156,40 +156,51 @@ struct intel_context {
 	u8 wa_bb_page; /* if set, page num reserved for context workarounds */
 
 	struct {
-		/** lock: protects everything in guc_state */
+		/** @lock: protects everything in guc_state */
 		spinlock_t lock;
 		/**
-		 * sched_state: scheduling state of this context using GuC
+		 * @sched_state: scheduling state of this context using GuC
 		 * submission
 		 */
 		u32 sched_state;
 		/*
-		 * fences: maintains of list of requests that have a submit
-		 * fence related to GuC submission
+		 * @fences: maintains a list of requests that are currently
+		 * being fenced until a GuC operation completes
 		 */
 		struct list_head fences;
-		/* GuC context blocked fence */
+		/**
+		 * @blocked: fence used to signal when the blocking of a
+		 * context's submissions is complete.
+		 */
 		struct i915_sw_fence blocked;
-		/* GuC committed requests */
+		/** @number_committed_requests: number of committed requests */
 		int number_committed_requests;
-		/** requests: active requests on this context */
+		/** @requests: list of active requests on this context */
 		struct list_head requests;
-		/*
-		 * GuC priority management
-		 */
+		/** @prio: the context's current guc priority */
 		u8 prio;
+		/**
+		 * @prio_count: a counter of the number requests in flight in
+		 * each priority bucket
+		 */
 		u32 prio_count[GUC_CLIENT_PRIORITY_NUM];
 	} guc_state;
 
 	struct {
-		/* GuC LRC descriptor ID */
+		/**
+		 * @id: handle which is used to uniquely identify this context
+		 * with the GuC, protected by guc->contexts_lock
+		 */
 		u16 id;
-
-		/* GuC LRC descriptor reference count */
+		/**
+		 * @ref: the number of references to the guc_id, when
+		 * transitioning in and out of zero protected by
+		 * guc->contexts_lock
+		 */
 		atomic_t ref;
-
-		/*
-		 * GuC ID link - in list when unpinned but guc_id still valid in GuC
+		/**
+		 * @link: in guc->guc_id_list when the guc_id has no refs but is
+		 * still valid, protected by guc->contexts_lock
 		 */
 		struct list_head link;
 	} guc_id;
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc.h
index 2e27fe59786b..5dd174babf7a 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc.h
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.h
@@ -22,74 +22,121 @@
 
 struct __guc_ads_blob;
 
-/*
- * Top level structure of GuC. It handles firmware loading and manages client
- * pool. intel_guc owns a intel_guc_client to replace the legacy ExecList
- * submission.
+/**
+ * struct intel_guc - Top level structure of GuC.
+ *
+ * It handles firmware loading and manages client pool. intel_guc owns an
+ * i915_sched_engine for submission.
  */
 struct intel_guc {
+	/** @fw: the GuC firmware */
 	struct intel_uc_fw fw;
+	/** @log: sub-structure containing GuC log related data and objects */
 	struct intel_guc_log log;
+	/** @ct: the command transport communication channel */
 	struct intel_guc_ct ct;
+	/** @slpc: sub-structure containing SLPC related data and objects */
 	struct intel_guc_slpc slpc;
 
-	/* Global engine used to submit requests to GuC */
+	/** @sched_engine: Global engine used to submit requests to GuC */
 	struct i915_sched_engine *sched_engine;
+	/**
+	 * @stalled_request: if GuC can't process a request for any reason, we
+	 * save it until GuC restarts processing. No other request can be
+	 * submitted until the stalled request is processed.
+	 */
 	struct i915_request *stalled_request;
 
 	/* intel_guc_recv interrupt related state */
+	/** @irq_lock: protects GuC irq state */
 	spinlock_t irq_lock;
+	/**
+	 * @msg_enabled_mask: mask of events that are processed when receiving
+	 * an INTEL_GUC_ACTION_DEFAULT G2H message.
+	 */
 	unsigned int msg_enabled_mask;
 
+	/**
+	 * @outstanding_submission_g2h: number of outstanding GuC to Host
+	 * responses related to GuC submission, used to determine if the GT is
+	 * idle
+	 */
 	atomic_t outstanding_submission_g2h;
 
+	/** @interrupts: pointers to GuC interrupt-managing functions. */
 	struct {
 		void (*reset)(struct intel_guc *guc);
 		void (*enable)(struct intel_guc *guc);
 		void (*disable)(struct intel_guc *guc);
 	} interrupts;
 
-	/*
-	 * contexts_lock protects the pool of free guc ids and a linked list of
-	 * guc ids available to be stolen
+	/**
+	 * @contexts_lock: protects guc_ids, guc_id_list, ce->guc_id.id, and
+	 * ce->guc_id.ref when transitioning in and out of zero
 	 */
 	spinlock_t contexts_lock;
+	/** @guc_ids: used to allocate unique ce->guc_id.id values */
 	struct ida guc_ids;
+	/**
+	 * @guc_id_list: list of intel_context with valid guc_ids but no refs
+	 */
 	struct list_head guc_id_list;
 
+	/**
+	 * @submission_supported: tracks whether we support GuC submission on
+	 * the current platform
+	 */
 	bool submission_supported;
+	/** @submission_selected: tracks whether the user enabled GuC submission */
 	bool submission_selected;
+	/**
+	 * @rc_supported: tracks whether we support GuC rc on the current platform
+	 */
 	bool rc_supported;
+	/** @rc_selected: tracks whether the user enabled GuC rc */
 	bool rc_selected;
 
+	/** @ads_vma: object allocated to hold the GuC ADS */
 	struct i915_vma *ads_vma;
+	/** @ads_blob: contents of the GuC ADS */
 	struct __guc_ads_blob *ads_blob;
+	/** @ads_regset_size: size of the save/restore regsets in the ADS */
 	u32 ads_regset_size;
+	/** @ads_golden_ctxt_size: size of the golden contexts in the ADS */
 	u32 ads_golden_ctxt_size;
 
+	/** @lrc_desc_pool: object allocated to hold the GuC LRC descriptor pool */
 	struct i915_vma *lrc_desc_pool;
+	/** @lrc_desc_pool_vaddr: contents of the GuC LRC descriptor pool */
 	void *lrc_desc_pool_vaddr;
 
-	/* guc_id to intel_context lookup */
+	/**
+	 * @context_lookup: used to resolve intel_context from guc_id, if a
+	 * context is present in this structure it is registered with the GuC
+	 */
 	struct xarray context_lookup;
 
-	/* Control params for fw initialization */
+	/** @params: Control params for fw initialization */
 	u32 params[GUC_CTL_MAX_DWORDS];
 
-	/* GuC's FW specific registers used in MMIO send */
+	/** @send_regs: GuC's FW specific registers used for sending MMIO H2G */
 	struct {
 		u32 base;
 		unsigned int count;
 		enum forcewake_domains fw_domains;
 	} send_regs;
 
-	/* register used to send interrupts to the GuC FW */
+	/** @notify_reg: register used to send interrupts to the GuC FW */
 	i915_reg_t notify_reg;
 
-	/* Store msg (e.g. log flush) that we see while CTBs are disabled */
+	/**
+	 * @mmio_msg: notification bitmask that the GuC writes in one of its
+	 * registers when the CT channel is disabled, to be processed when the
+	 * channel is back up.
+	 */
 	u32 mmio_msg;
 
-	/* To serialize the intel_guc_send actions */
+	/** @send_mutex: used to serialize the intel_guc_send actions */
 	struct mutex send_mutex;
 };
 
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 a9cf49298067..c7a41802b448 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -28,21 +28,6 @@
 /**
  * DOC: GuC-based command submission
  *
- * IMPORTANT NOTE: GuC submission is currently not supported in i915. The GuC
- * firmware is moving to an updated submission interface and we plan to
- * turn submission back on when that lands. The below documentation (and related
- * code) matches the old submission model and will be updated as part of the
- * upgrade to the new flow.
- *
- * GuC stage descriptor:
- * During initialization, the driver allocates a static pool of 1024 such
- * descriptors, and shares them with the GuC. Currently, we only use one
- * descriptor. This stage descriptor lets the GuC know about the workqueue and
- * process descriptor. Theoretically, it also lets the GuC know about our HW
- * contexts (context ID, etc...), but we actually employ a kind of submission
- * where the GuC uses the LRCA sent via the work item instead. This is called
- * a "proxy" submission.
- *
  * The Scratch registers:
  * There are 16 MMIO-based registers start from 0xC180. The kernel driver writes
  * a value to the action register (SOFT_SCRATCH_0) along with any data. It then
@@ -51,14 +36,85 @@
  * processes the request. The kernel driver polls waiting for this update and
  * then proceeds.
  *
- * Work Items:
- * There are several types of work items that the host may place into a
- * workqueue, each with its own requirements and limitations. Currently only
- * WQ_TYPE_INORDER is needed to support legacy submission via GuC, which
- * represents in-order queue. The kernel driver packs ring tail pointer and an
- * ELSP context descriptor dword into Work Item.
- * See guc_add_request()
+ * Command Transport buffers (CTBs):
+ * Covered in detail in other sections but CTBs (Host to GuC - H2G, GuC to Host
+ * - G2H) are a message interface between the i915 and GuC.
+ *
+ * Context registration:
+ * Before a context can be submitted it must be registered with the GuC via a
+ * H2G. A unique guc_id is associated with each context. The context is either
+ * registered at request creation time (normal operation) or at submission time
+ * (abnormal operation, e.g. after a reset).
+ *
+ * Context submission:
+ * The i915 updates the LRC tail value in memory. The i915 must enable the
+ * scheduling of the context within the GuC for the GuC to actually consider it.
+ * Therefore, the first time a disabled context is submitted we use a schedule
+ * enable H2G, while follow up submissions are done via the context submit H2G,
+ * which informs the GuC that a previously enabled context has new work
+ * available.
+ *
+ * Context unpin:
+ * To unpin a context a H2G is used to disable scheduling. When the
+ * corresponding G2H returns indicating the scheduling disable operation has
+ * completed it is safe to unpin the context. While a disable is in flight it
+ * isn't safe to resubmit the context so a fence is used to stall all future
+ * requests of that context until the G2H is returned.
+ *
+ * Context deregistration:
+ * Before a context can be destroyed or if we steal its guc_id we must
+ * deregister the context with the GuC via H2G. If stealing the guc_id it isn't
+ * safe to submit anything to this guc_id until the deregister completes so a
+ * fence is used to stall all requests associated with this guc_id until the
+ * corresponding G2H returns indicating the guc_id has been deregistered.
+ *
+ * guc_ids:
+ * Unique number associated with private GuC context data passed in during
+ * context registration / submission / deregistration. 64k available. Simple ida
+ * is used for allocation.
+ *
+ * Stealing guc_ids:
+ * If no guc_ids are available they can be stolen from another context at
+ * request creation time if that context is unpinned. If a guc_id can't be found
+ * we punt this problem to the user as we believe this is near impossible to hit
+ * during normal use cases.
+ *
+ * Locking:
+ * In the GuC submission code we have 3 basic spin locks which protect
+ * everything. Details about each below.
+ *
+ * sched_engine->lock
+ * This is the submission lock for all contexts that share an i915 schedule
+ * engine (sched_engine), thus only one of the contexts which share a
+ * sched_engine can be submitting at a time. Currently only one sched_engine is
+ * used for all of GuC submission but that could change in the future.
+ *
+ * guc->contexts_lock
+ * Protects guc_id allocation for the given GuC, i.e. only one context can be
+ * doing guc_id allocation operations at a time for each GuC in the system.
+ *
+ * ce->guc_state.lock
+ * Protects everything under ce->guc_state. Ensures that a context is in the
+ * correct state before issuing a H2G. e.g. We don't issue a schedule disable
+ * on a disabled context (bad idea), we don't issue a schedule enable when a
+ * schedule disable is in flight, etc... Also protects list of inflight requests
+ * on the context and the priority management state. Lock is individual to each
+ * context.
+ *
+ * Lock ordering rules:
+ * sched_engine->lock -> ce->guc_state.lock
+ * guc->contexts_lock -> ce->guc_state.lock
  *
+ * Reset races:
+ * When a full GT reset is triggered it is assumed that some G2H responses to
+ * H2Gs can be lost as the GuC is also reset. Losing these G2H can prove to be
+ * fatal as we do certain operations upon receiving a G2H (e.g. destroy
+ * contexts, release guc_ids, etc...). When this occurs we can scrub the
+ * context state and cleanup appropriately, however this is quite racey.
+ * To avoid races, the reset code must disable submission before scrubbing for
+ * the missing G2H, while the submission code must check for submission being
+ * disabled and skip sending H2Gs and updating context states when it is. Both
+ * sides must also make sure to hold the relevant locks.
  */
 
 /* GuC Virtual Engine */
diff --git a/drivers/gpu/drm/i915/i915_request.h b/drivers/gpu/drm/i915/i915_request.h
index d818cfbfc41d..7bd9ed20623e 100644
--- a/drivers/gpu/drm/i915/i915_request.h
+++ b/drivers/gpu/drm/i915/i915_request.h
@@ -290,18 +290,23 @@ struct i915_request {
 		struct hrtimer timer;
 	} watchdog;
 
-	/*
-	 * Requests may need to be stalled when using GuC submission waiting for
-	 * certain GuC operations to complete. If that is the case, stalled
-	 * requests are added to a per context list of stalled requests. The
-	 * below list_head is the link in that list.
+	/**
+	 * @guc_fence_link: Requests may need to be stalled when using GuC
+	 * submission waiting for certain GuC operations to complete. If that is
+	 * the case, stalled requests are added to a per context list of stalled
+	 * requests. The below list_head is the link in that list. Protected by
+	 * ce->guc_state.lock.
 	 */
 	struct list_head guc_fence_link;
 
 	/**
-	 * Priority level while the request is inflight. Differs from i915
-	 * scheduler priority. See comment above
-	 * I915_SCHEDULER_CAP_STATIC_PRIORITY_MAP for details.
+	 * @guc_prio: Priority level while the request is in flight. Differs
+	 * from i915 scheduler priority. See comment above
+	 * I915_SCHEDULER_CAP_STATIC_PRIORITY_MAP for details. Protected by
+	 * ce->guc_active.lock. Two special values (GUC_PRIO_INIT and
+	 * GUC_PRIO_FINI) outside the GuC priority range are used to indicate
+	 * if the priority has not been initialized yet or if no more updates
+	 * are possible because the request has completed.
 	 */
 #define	GUC_PRIO_INIT	0xff
 #define	GUC_PRIO_FINI	0xfe
-- 
2.32.0

[Intel-gfx] [PATCH 23/23] drm/i915/guc: Add GuC kernel doc

[Matthew Brost]

Add GuC kernel doc for all structures added thus far for GuC submission
and update the main GuC submission section with the new interface
details.

v2:
 - Drop guc_active.lock DOC
v3:
 - Fixup a few kernel doc comments (Daniele)
v4 (Daniele):
 - Implement doc suggestions from John
 - Add kerneldoc for all members of the GuC structure and pull the file
   in i915.rst
v5 (Daniele):
 - Implement new doc suggestions from John

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: John Harrison <John.C.Harrison@Intel.com>
---
 Documentation/gpu/i915.rst                    |   2 +
 drivers/gpu/drm/i915/gt/intel_context_types.h |  43 +++++---
 drivers/gpu/drm/i915/gt/uc/intel_guc.h        |  75 ++++++++++---
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 100 ++++++++++++++----
 drivers/gpu/drm/i915/i915_request.h           |  21 ++--
 5 files changed, 181 insertions(+), 60 deletions(-)

diff --git a/Documentation/gpu/i915.rst b/Documentation/gpu/i915.rst
index 101dde3eb1ea..311e10400708 100644
--- a/Documentation/gpu/i915.rst
+++ b/Documentation/gpu/i915.rst
@@ -495,6 +495,8 @@ GuC
 .. kernel-doc:: drivers/gpu/drm/i915/gt/uc/intel_guc.c
    :doc: GuC
 
+.. kernel-doc:: drivers/gpu/drm/i915/gt/uc/intel_guc.h
+
 GuC Firmware Layout
 ~~~~~~~~~~~~~~~~~~~
 
diff --git a/drivers/gpu/drm/i915/gt/intel_context_types.h b/drivers/gpu/drm/i915/gt/intel_context_types.h
index 5285d660eacf..930569a1a01f 100644
--- a/drivers/gpu/drm/i915/gt/intel_context_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_context_types.h
@@ -156,40 +156,51 @@ struct intel_context {
 	u8 wa_bb_page; /* if set, page num reserved for context workarounds */
 
 	struct {
-		/** lock: protects everything in guc_state */
+		/** @lock: protects everything in guc_state */
 		spinlock_t lock;
 		/**
-		 * sched_state: scheduling state of this context using GuC
+		 * @sched_state: scheduling state of this context using GuC
 		 * submission
 		 */
 		u32 sched_state;
 		/*
-		 * fences: maintains of list of requests that have a submit
-		 * fence related to GuC submission
+		 * @fences: maintains a list of requests that are currently
+		 * being fenced until a GuC operation completes
 		 */
 		struct list_head fences;
-		/* GuC context blocked fence */
+		/**
+		 * @blocked: fence used to signal when the blocking of a
+		 * context's submissions is complete.
+		 */
 		struct i915_sw_fence blocked;
-		/* GuC committed requests */
+		/** @number_committed_requests: number of committed requests */
 		int number_committed_requests;
-		/** requests: active requests on this context */
+		/** @requests: list of active requests on this context */
 		struct list_head requests;
-		/*
-		 * GuC priority management
-		 */
+		/** @prio: the context's current guc priority */
 		u8 prio;
+		/**
+		 * @prio_count: a counter of the number requests in flight in
+		 * each priority bucket
+		 */
 		u32 prio_count[GUC_CLIENT_PRIORITY_NUM];
 	} guc_state;
 
 	struct {
-		/* GuC LRC descriptor ID */
+		/**
+		 * @id: handle which is used to uniquely identify this context
+		 * with the GuC, protected by guc->contexts_lock
+		 */
 		u16 id;
-
-		/* GuC LRC descriptor reference count */
+		/**
+		 * @ref: the number of references to the guc_id, when
+		 * transitioning in and out of zero protected by
+		 * guc->contexts_lock
+		 */
 		atomic_t ref;
-
-		/*
-		 * GuC ID link - in list when unpinned but guc_id still valid in GuC
+		/**
+		 * @link: in guc->guc_id_list when the guc_id has no refs but is
+		 * still valid, protected by guc->contexts_lock
 		 */
 		struct list_head link;
 	} guc_id;
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc.h
index 2e27fe59786b..5dd174babf7a 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc.h
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.h
@@ -22,74 +22,121 @@
 
 struct __guc_ads_blob;
 
-/*
- * Top level structure of GuC. It handles firmware loading and manages client
- * pool. intel_guc owns a intel_guc_client to replace the legacy ExecList
- * submission.
+/**
+ * struct intel_guc - Top level structure of GuC.
+ *
+ * It handles firmware loading and manages client pool. intel_guc owns an
+ * i915_sched_engine for submission.
  */
 struct intel_guc {
+	/** @fw: the GuC firmware */
 	struct intel_uc_fw fw;
+	/** @log: sub-structure containing GuC log related data and objects */
 	struct intel_guc_log log;
+	/** @ct: the command transport communication channel */
 	struct intel_guc_ct ct;
+	/** @slpc: sub-structure containing SLPC related data and objects */
 	struct intel_guc_slpc slpc;
 
-	/* Global engine used to submit requests to GuC */
+	/** @sched_engine: Global engine used to submit requests to GuC */
 	struct i915_sched_engine *sched_engine;
+	/**
+	 * @stalled_request: if GuC can't process a request for any reason, we
+	 * save it until GuC restarts processing. No other request can be
+	 * submitted until the stalled request is processed.
+	 */
 	struct i915_request *stalled_request;
 
 	/* intel_guc_recv interrupt related state */
+	/** @irq_lock: protects GuC irq state */
 	spinlock_t irq_lock;
+	/**
+	 * @msg_enabled_mask: mask of events that are processed when receiving
+	 * an INTEL_GUC_ACTION_DEFAULT G2H message.
+	 */
 	unsigned int msg_enabled_mask;
 
+	/**
+	 * @outstanding_submission_g2h: number of outstanding GuC to Host
+	 * responses related to GuC submission, used to determine if the GT is
+	 * idle
+	 */
 	atomic_t outstanding_submission_g2h;
 
+	/** @interrupts: pointers to GuC interrupt-managing functions. */
 	struct {
 		void (*reset)(struct intel_guc *guc);
 		void (*enable)(struct intel_guc *guc);
 		void (*disable)(struct intel_guc *guc);
 	} interrupts;
 
-	/*
-	 * contexts_lock protects the pool of free guc ids and a linked list of
-	 * guc ids available to be stolen
+	/**
+	 * @contexts_lock: protects guc_ids, guc_id_list, ce->guc_id.id, and
+	 * ce->guc_id.ref when transitioning in and out of zero
 	 */
 	spinlock_t contexts_lock;
+	/** @guc_ids: used to allocate unique ce->guc_id.id values */
 	struct ida guc_ids;
+	/**
+	 * @guc_id_list: list of intel_context with valid guc_ids but no refs
+	 */
 	struct list_head guc_id_list;
 
+	/**
+	 * @submission_supported: tracks whether we support GuC submission on
+	 * the current platform
+	 */
 	bool submission_supported;
+	/** @submission_selected: tracks whether the user enabled GuC submission */
 	bool submission_selected;
+	/**
+	 * @rc_supported: tracks whether we support GuC rc on the current platform
+	 */
 	bool rc_supported;
+	/** @rc_selected: tracks whether the user enabled GuC rc */
 	bool rc_selected;
 
+	/** @ads_vma: object allocated to hold the GuC ADS */
 	struct i915_vma *ads_vma;
+	/** @ads_blob: contents of the GuC ADS */
 	struct __guc_ads_blob *ads_blob;
+	/** @ads_regset_size: size of the save/restore regsets in the ADS */
 	u32 ads_regset_size;
+	/** @ads_golden_ctxt_size: size of the golden contexts in the ADS */
 	u32 ads_golden_ctxt_size;
 
+	/** @lrc_desc_pool: object allocated to hold the GuC LRC descriptor pool */
 	struct i915_vma *lrc_desc_pool;
+	/** @lrc_desc_pool_vaddr: contents of the GuC LRC descriptor pool */
 	void *lrc_desc_pool_vaddr;
 
-	/* guc_id to intel_context lookup */
+	/**
+	 * @context_lookup: used to resolve intel_context from guc_id, if a
+	 * context is present in this structure it is registered with the GuC
+	 */
 	struct xarray context_lookup;
 
-	/* Control params for fw initialization */
+	/** @params: Control params for fw initialization */
 	u32 params[GUC_CTL_MAX_DWORDS];
 
-	/* GuC's FW specific registers used in MMIO send */
+	/** @send_regs: GuC's FW specific registers used for sending MMIO H2G */
 	struct {
 		u32 base;
 		unsigned int count;
 		enum forcewake_domains fw_domains;
 	} send_regs;
 
-	/* register used to send interrupts to the GuC FW */
+	/** @notify_reg: register used to send interrupts to the GuC FW */
 	i915_reg_t notify_reg;
 
-	/* Store msg (e.g. log flush) that we see while CTBs are disabled */
+	/**
+	 * @mmio_msg: notification bitmask that the GuC writes in one of its
+	 * registers when the CT channel is disabled, to be processed when the
+	 * channel is back up.
+	 */
 	u32 mmio_msg;
 
-	/* To serialize the intel_guc_send actions */
+	/** @send_mutex: used to serialize the intel_guc_send actions */
 	struct mutex send_mutex;
 };
 
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 a9cf49298067..c7a41802b448 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -28,21 +28,6 @@
 /**
  * DOC: GuC-based command submission
  *
- * IMPORTANT NOTE: GuC submission is currently not supported in i915. The GuC
- * firmware is moving to an updated submission interface and we plan to
- * turn submission back on when that lands. The below documentation (and related
- * code) matches the old submission model and will be updated as part of the
- * upgrade to the new flow.
- *
- * GuC stage descriptor:
- * During initialization, the driver allocates a static pool of 1024 such
- * descriptors, and shares them with the GuC. Currently, we only use one
- * descriptor. This stage descriptor lets the GuC know about the workqueue and
- * process descriptor. Theoretically, it also lets the GuC know about our HW
- * contexts (context ID, etc...), but we actually employ a kind of submission
- * where the GuC uses the LRCA sent via the work item instead. This is called
- * a "proxy" submission.
- *
  * The Scratch registers:
  * There are 16 MMIO-based registers start from 0xC180. The kernel driver writes
  * a value to the action register (SOFT_SCRATCH_0) along with any data. It then
@@ -51,14 +36,85 @@
  * processes the request. The kernel driver polls waiting for this update and
  * then proceeds.
  *
- * Work Items:
- * There are several types of work items that the host may place into a
- * workqueue, each with its own requirements and limitations. Currently only
- * WQ_TYPE_INORDER is needed to support legacy submission via GuC, which
- * represents in-order queue. The kernel driver packs ring tail pointer and an
- * ELSP context descriptor dword into Work Item.
- * See guc_add_request()
+ * Command Transport buffers (CTBs):
+ * Covered in detail in other sections but CTBs (Host to GuC - H2G, GuC to Host
+ * - G2H) are a message interface between the i915 and GuC.
+ *
+ * Context registration:
+ * Before a context can be submitted it must be registered with the GuC via a
+ * H2G. A unique guc_id is associated with each context. The context is either
+ * registered at request creation time (normal operation) or at submission time
+ * (abnormal operation, e.g. after a reset).
+ *
+ * Context submission:
+ * The i915 updates the LRC tail value in memory. The i915 must enable the
+ * scheduling of the context within the GuC for the GuC to actually consider it.
+ * Therefore, the first time a disabled context is submitted we use a schedule
+ * enable H2G, while follow up submissions are done via the context submit H2G,
+ * which informs the GuC that a previously enabled context has new work
+ * available.
+ *
+ * Context unpin:
+ * To unpin a context a H2G is used to disable scheduling. When the
+ * corresponding G2H returns indicating the scheduling disable operation has
+ * completed it is safe to unpin the context. While a disable is in flight it
+ * isn't safe to resubmit the context so a fence is used to stall all future
+ * requests of that context until the G2H is returned.
+ *
+ * Context deregistration:
+ * Before a context can be destroyed or if we steal its guc_id we must
+ * deregister the context with the GuC via H2G. If stealing the guc_id it isn't
+ * safe to submit anything to this guc_id until the deregister completes so a
+ * fence is used to stall all requests associated with this guc_id until the
+ * corresponding G2H returns indicating the guc_id has been deregistered.
+ *
+ * guc_ids:
+ * Unique number associated with private GuC context data passed in during
+ * context registration / submission / deregistration. 64k available. Simple ida
+ * is used for allocation.
+ *
+ * Stealing guc_ids:
+ * If no guc_ids are available they can be stolen from another context at
+ * request creation time if that context is unpinned. If a guc_id can't be found
+ * we punt this problem to the user as we believe this is near impossible to hit
+ * during normal use cases.
+ *
+ * Locking:
+ * In the GuC submission code we have 3 basic spin locks which protect
+ * everything. Details about each below.
+ *
+ * sched_engine->lock
+ * This is the submission lock for all contexts that share an i915 schedule
+ * engine (sched_engine), thus only one of the contexts which share a
+ * sched_engine can be submitting at a time. Currently only one sched_engine is
+ * used for all of GuC submission but that could change in the future.
+ *
+ * guc->contexts_lock
+ * Protects guc_id allocation for the given GuC, i.e. only one context can be
+ * doing guc_id allocation operations at a time for each GuC in the system.
+ *
+ * ce->guc_state.lock
+ * Protects everything under ce->guc_state. Ensures that a context is in the
+ * correct state before issuing a H2G. e.g. We don't issue a schedule disable
+ * on a disabled context (bad idea), we don't issue a schedule enable when a
+ * schedule disable is in flight, etc... Also protects list of inflight requests
+ * on the context and the priority management state. Lock is individual to each
+ * context.
+ *
+ * Lock ordering rules:
+ * sched_engine->lock -> ce->guc_state.lock
+ * guc->contexts_lock -> ce->guc_state.lock
  *
+ * Reset races:
+ * When a full GT reset is triggered it is assumed that some G2H responses to
+ * H2Gs can be lost as the GuC is also reset. Losing these G2H can prove to be
+ * fatal as we do certain operations upon receiving a G2H (e.g. destroy
+ * contexts, release guc_ids, etc...). When this occurs we can scrub the
+ * context state and cleanup appropriately, however this is quite racey.
+ * To avoid races, the reset code must disable submission before scrubbing for
+ * the missing G2H, while the submission code must check for submission being
+ * disabled and skip sending H2Gs and updating context states when it is. Both
+ * sides must also make sure to hold the relevant locks.
  */
 
 /* GuC Virtual Engine */
diff --git a/drivers/gpu/drm/i915/i915_request.h b/drivers/gpu/drm/i915/i915_request.h
index d818cfbfc41d..7bd9ed20623e 100644
--- a/drivers/gpu/drm/i915/i915_request.h
+++ b/drivers/gpu/drm/i915/i915_request.h
@@ -290,18 +290,23 @@ struct i915_request {
 		struct hrtimer timer;
 	} watchdog;
 
-	/*
-	 * Requests may need to be stalled when using GuC submission waiting for
-	 * certain GuC operations to complete. If that is the case, stalled
-	 * requests are added to a per context list of stalled requests. The
-	 * below list_head is the link in that list.
+	/**
+	 * @guc_fence_link: Requests may need to be stalled when using GuC
+	 * submission waiting for certain GuC operations to complete. If that is
+	 * the case, stalled requests are added to a per context list of stalled
+	 * requests. The below list_head is the link in that list. Protected by
+	 * ce->guc_state.lock.
 	 */
 	struct list_head guc_fence_link;
 
 	/**
-	 * Priority level while the request is inflight. Differs from i915
-	 * scheduler priority. See comment above
-	 * I915_SCHEDULER_CAP_STATIC_PRIORITY_MAP for details.
+	 * @guc_prio: Priority level while the request is in flight. Differs
+	 * from i915 scheduler priority. See comment above
+	 * I915_SCHEDULER_CAP_STATIC_PRIORITY_MAP for details. Protected by
+	 * ce->guc_active.lock. Two special values (GUC_PRIO_INIT and
+	 * GUC_PRIO_FINI) outside the GuC priority range are used to indicate
+	 * if the priority has not been initialized yet or if no more updates
+	 * are possible because the request has completed.
 	 */
 #define	GUC_PRIO_INIT	0xff
 #define	GUC_PRIO_FINI	0xfe
-- 
2.32.0

[Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for Clean up GuC CI failures, simplify locking, and kernel DOC (rev11)

[Patchwork]

== Series Details ==

Series: Clean up GuC CI failures, simplify locking, and kernel DOC (rev11)
URL   : https://patchwork.freedesktop.org/series/93704/
State : warning

== Summary ==

$ dim checkpatch origin/drm-tip
deb17f151cef drm/i915/guc: Fix blocked context accounting
7b4cd4d6bb36 drm/i915/guc: Fix outstanding G2H accounting
ea81f9db116d drm/i915/guc: Unwind context requests in reverse order
a6990f6f2a54 drm/i915/guc: Don't drop ce->guc_active.lock when unwinding context
31c0bfa6a01d drm/i915/guc: Process all G2H message at once in work queue
5f8dae15114c drm/i915/guc: Workaround reset G2H is received after schedule done G2H
0a9d7cef0e5a Revert "drm/i915/gt: Propagate change in error status to children on unhold"
-:8: ERROR:GIT_COMMIT_ID: Please use git commit description style 'commit <12+ chars of sha1> ("<title line>")' - ie: 'commit 3761baae908a ("Revert "drm/i915: Propagate errors on awaiting already signaled fences"")'
#8: 
from one client ending up in another. In commit 3761baae908a ("Revert

-:27: WARNING:COMMIT_LOG_LONG_LINE: Possible unwrapped commit description (prefer a maximum 75 chars per line)
#27: 
References: '3761baae908a ("Revert "drm/i915: Propagate errors on awaiting already signaled fences"")'

total: 1 errors, 1 warnings, 0 checks, 10 lines checked
f9567c78788e drm/i915/guc: Kick tasklet after queuing a request
-:8: WARNING:TYPO_SPELLING: 'inteface' may be misspelled - perhaps 'interface'?
#8: 
Fixes: 3a4cdf1982f0 ("drm/i915/guc: Implement GuC context operations for new inteface")
                                                                             ^^^^^^^^

total: 0 errors, 1 warnings, 0 checks, 7 lines checked
501532c37b64 drm/i915/guc: Don't enable scheduling on a banned context, guc_id invalid, not registered
69005a00e8aa drm/i915/guc: Copy whole golden context, set engine state size of subset
e56171c3dd6b drm/i915/selftests: Add initial GuC selftest for scrubbing lost G2H
-:108: WARNING:FILE_PATH_CHANGES: added, moved or deleted file(s), does MAINTAINERS need updating?
#108: 
new file mode 100644

total: 0 errors, 1 warnings, 0 checks, 233 lines checked
8a8cf43913a0 drm/i915/guc: Take context ref when cancelling request
1e192098087d drm/i915/guc: Don't touch guc_state.sched_state without a lock
dbef2fc197c8 drm/i915/guc: Reset LRC descriptor if register returns -ENODEV
5db9a3bcd282 drm/i915/guc: Release submit fence from an irq_work
a469ee468f89 drm/i915/guc: Move guc_blocked fence to struct guc_state
86fe44af0f11 drm/i915/guc: Rework and simplify locking
e9666ec08fe7 drm/i915/guc: Proper xarray usage for contexts_lookup
a75af0fb3825 drm/i915/guc: Drop pin count check trick between sched_disable and re-pin
eded4f6781e4 drm/i915/guc: Move GuC priority fields in context under guc_active
f51ccdbc1d50 drm/i915/guc: Move fields protected by guc->contexts_lock into sub structure
93b6576f14c0 drm/i915/guc: Drop guc_active move everything into guc_state
e4747b33f311 drm/i915/guc: Add GuC kernel doc

[Intel-gfx] ✗ Fi.CI.SPARSE: warning for Clean up GuC CI failures, simplify locking, and kernel DOC (rev11)

[Patchwork]

== Series Details ==

Series: Clean up GuC CI failures, simplify locking, and kernel DOC (rev11)
URL   : https://patchwork.freedesktop.org/series/93704/
State : warning

== Summary ==

$ dim sparse --fast origin/drm-tip
Sparse version: v0.6.2
Fast mode used, each commit won't be checked separately.
+drivers/gpu/drm/i915/selftests/i915_syncmap.c:80:54: warning: dubious: x | !y

[Intel-gfx] ✓ Fi.CI.BAT: success for Clean up GuC CI failures, simplify locking, and kernel DOC (rev11)

[Patchwork]

[-- Attachment #1: Type: text/plain, Size: 4697 bytes --]

== Series Details ==

Series: Clean up GuC CI failures, simplify locking, and kernel DOC (rev11)
URL   : https://patchwork.freedesktop.org/series/93704/
State : success

== Summary ==

CI Bug Log - changes from CI_DRM_10565 -> Patchwork_21004
====================================================

Summary
-------

  **SUCCESS**

  No regressions found.

  External URL: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/index.html

New tests
---------

  New tests have been introduced between CI_DRM_10565 and Patchwork_21004:

### New IGT tests (1) ###

  * igt@i915_selftest@live@guc:
    - Statuses : 34 pass(s)
    - Exec time: [0.43, 5.04] s

  

Known issues
------------

  Here are the changes found in Patchwork_21004 that come from known issues:

### IGT changes ###

#### Issues hit ####

  * igt@amdgpu/amd_basic@semaphore:
    - fi-bdw-5557u:       NOTRUN -> [SKIP][1] ([fdo#109271]) +27 similar issues
   [1]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/fi-bdw-5557u/igt@amdgpu/amd_basic@semaphore.html

  * igt@core_hotunplug@unbind-rebind:
    - fi-bdw-5557u:       NOTRUN -> [WARN][2] ([i915#3718])
   [2]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/fi-bdw-5557u/igt@core_hotunplug@unbind-rebind.html

  * igt@kms_chamelium@dp-crc-fast:
    - fi-bdw-5557u:       NOTRUN -> [SKIP][3] ([fdo#109271] / [fdo#111827]) +8 similar issues
   [3]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/fi-bdw-5557u/igt@kms_chamelium@dp-crc-fast.html

  
#### Possible fixes ####

  * igt@i915_selftest@live@gt_pm:
    - {fi-jsl-1}:         [DMESG-FAIL][4] ([i915#1886]) -> [PASS][5]
   [4]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/fi-jsl-1/igt@i915_selftest@live@gt_pm.html
   [5]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/fi-jsl-1/igt@i915_selftest@live@gt_pm.html

  
  {name}: This element is suppressed. This means it is ignored when computing
          the status of the difference (SUCCESS, WARNING, or FAILURE).

  [fdo#109271]: https://bugs.freedesktop.org/show_bug.cgi?id=109271
  [fdo#111827]: https://bugs.freedesktop.org/show_bug.cgi?id=111827
  [i915#1886]: https://gitlab.freedesktop.org/drm/intel/issues/1886
  [i915#3718]: https://gitlab.freedesktop.org/drm/intel/issues/3718


Participating hosts (47 -> 38)
------------------------------

  Missing    (9): fi-ilk-m540 bat-adls-5 bat-dg1-6 fi-bsw-cyan bat-adlp-4 fi-ctg-p8600 fi-bsw-kefka fi-bdw-samus bat-jsl-1 


Build changes
-------------

  * Linux: CI_DRM_10565 -> Patchwork_21004

  CI-20190529: 20190529
  CI_DRM_10565: 8c3cd60dcfa81a649b14f0705eb5e5c9336f1881 @ git://anongit.freedesktop.org/gfx-ci/linux
  IGT_6201: be0d02ff0775235ead63ccb1e3a1e8c10f0209cf @ https://gitlab.freedesktop.org/drm/igt-gpu-tools.git
  Patchwork_21004: e4747b33f311a3ec2567422f23945daef7a6588d @ git://anongit.freedesktop.org/gfx-ci/linux


== Linux commits ==

e4747b33f311 drm/i915/guc: Add GuC kernel doc
93b6576f14c0 drm/i915/guc: Drop guc_active move everything into guc_state
f51ccdbc1d50 drm/i915/guc: Move fields protected by guc->contexts_lock into sub structure
eded4f6781e4 drm/i915/guc: Move GuC priority fields in context under guc_active
a75af0fb3825 drm/i915/guc: Drop pin count check trick between sched_disable and re-pin
e9666ec08fe7 drm/i915/guc: Proper xarray usage for contexts_lookup
86fe44af0f11 drm/i915/guc: Rework and simplify locking
a469ee468f89 drm/i915/guc: Move guc_blocked fence to struct guc_state
5db9a3bcd282 drm/i915/guc: Release submit fence from an irq_work
dbef2fc197c8 drm/i915/guc: Reset LRC descriptor if register returns -ENODEV
1e192098087d drm/i915/guc: Don't touch guc_state.sched_state without a lock
8a8cf43913a0 drm/i915/guc: Take context ref when cancelling request
e56171c3dd6b drm/i915/selftests: Add initial GuC selftest for scrubbing lost G2H
69005a00e8aa drm/i915/guc: Copy whole golden context, set engine state size of subset
501532c37b64 drm/i915/guc: Don't enable scheduling on a banned context, guc_id invalid, not registered
f9567c78788e drm/i915/guc: Kick tasklet after queuing a request
0a9d7cef0e5a Revert "drm/i915/gt: Propagate change in error status to children on unhold"
5f8dae15114c drm/i915/guc: Workaround reset G2H is received after schedule done G2H
31c0bfa6a01d drm/i915/guc: Process all G2H message at once in work queue
a6990f6f2a54 drm/i915/guc: Don't drop ce->guc_active.lock when unwinding context
ea81f9db116d drm/i915/guc: Unwind context requests in reverse order
7b4cd4d6bb36 drm/i915/guc: Fix outstanding G2H accounting
deb17f151cef drm/i915/guc: Fix blocked context accounting

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/index.html

[-- Attachment #2: Type: text/html, Size: 5619 bytes --]

[Intel-gfx] ✗ Fi.CI.IGT: failure for Clean up GuC CI failures, simplify locking, and kernel DOC (rev11)

[Patchwork]

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== Series Details ==

Series: Clean up GuC CI failures, simplify locking, and kernel DOC (rev11)
URL   : https://patchwork.freedesktop.org/series/93704/
State : failure

== Summary ==

CI Bug Log - changes from CI_DRM_10565_full -> Patchwork_21004_full
====================================================

Summary
-------

  **FAILURE**

  Serious unknown changes coming with Patchwork_21004_full absolutely need to be
  verified manually.
  
  If you think the reported changes have nothing to do with the changes
  introduced in Patchwork_21004_full, please notify your bug team to allow them
  to document this new failure mode, which will reduce false positives in CI.

  

Possible new issues
-------------------

  Here are the unknown changes that may have been introduced in Patchwork_21004_full:

### IGT changes ###

#### Possible regressions ####

  * igt@kms_flip_scaled_crc@flip-32bpp-ytileccs-to-64bpp-ytile:
    - shard-iclb:         [PASS][1] -> [SKIP][2]
   [1]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-iclb7/igt@kms_flip_scaled_crc@flip-32bpp-ytileccs-to-64bpp-ytile.html
   [2]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-iclb2/igt@kms_flip_scaled_crc@flip-32bpp-ytileccs-to-64bpp-ytile.html

  * igt@kms_plane@plane-panning-bottom-right-suspend@pipe-b-planes:
    - shard-tglb:         [PASS][3] -> [INCOMPLETE][4]
   [3]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-tglb8/igt@kms_plane@plane-panning-bottom-right-suspend@pipe-b-planes.html
   [4]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-tglb7/igt@kms_plane@plane-panning-bottom-right-suspend@pipe-b-planes.html

  
#### Suppressed ####

  The following results come from untrusted machines, tests, or statuses.
  They do not affect the overall result.

  * igt@gem_eio@hibernate:
    - {shard-rkl}:        [TIMEOUT][5] ([i915#3811]) -> [FAIL][6]
   [5]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-rkl-5/igt@gem_eio@hibernate.html
   [6]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-rkl-2/igt@gem_eio@hibernate.html

  
New tests
---------

  New tests have been introduced between CI_DRM_10565_full and Patchwork_21004_full:

### New IGT tests (1) ###

  * igt@i915_selftest@live@guc:
    - Statuses : 6 pass(s)
    - Exec time: [0.46, 4.86] s

  

Known issues
------------

  Here are the changes found in Patchwork_21004_full that come from known issues:

### IGT changes ###

#### Issues hit ####

  * igt@gem_ctx_persistence@smoketest:
    - shard-snb:          NOTRUN -> [SKIP][7] ([fdo#109271] / [i915#1099]) +1 similar issue
   [7]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-snb2/igt@gem_ctx_persistence@smoketest.html

  * igt@gem_exec_fair@basic-none-vip@rcs0:
    - shard-kbl:          [PASS][8] -> [FAIL][9] ([i915#2842])
   [8]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-kbl3/igt@gem_exec_fair@basic-none-vip@rcs0.html
   [9]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-kbl7/igt@gem_exec_fair@basic-none-vip@rcs0.html

  * igt@gem_exec_fair@basic-none@vcs1:
    - shard-iclb:         NOTRUN -> [FAIL][10] ([i915#2842])
   [10]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-iclb1/igt@gem_exec_fair@basic-none@vcs1.html

  * igt@gem_exec_fair@basic-pace-share@rcs0:
    - shard-tglb:         [PASS][11] -> [FAIL][12] ([i915#2842]) +1 similar issue
   [11]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-tglb8/igt@gem_exec_fair@basic-pace-share@rcs0.html
   [12]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-tglb3/igt@gem_exec_fair@basic-pace-share@rcs0.html

  * igt@gem_exec_flush@basic-batch-kernel-default-cmd:
    - shard-snb:          NOTRUN -> [SKIP][13] ([fdo#109271]) +331 similar issues
   [13]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-snb7/igt@gem_exec_flush@basic-batch-kernel-default-cmd.html

  * igt@gem_exec_whisper@basic-contexts-forked-all:
    - shard-glk:          [PASS][14] -> [DMESG-WARN][15] ([i915#118] / [i915#95]) +1 similar issue
   [14]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-glk8/igt@gem_exec_whisper@basic-contexts-forked-all.html
   [15]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-glk1/igt@gem_exec_whisper@basic-contexts-forked-all.html

  * igt@gem_render_copy@linear-to-vebox-y-tiled:
    - shard-glk:          NOTRUN -> [SKIP][16] ([fdo#109271]) +3 similar issues
   [16]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-glk1/igt@gem_render_copy@linear-to-vebox-y-tiled.html

  * igt@gem_softpin@noreloc-s3:
    - shard-apl:          [PASS][17] -> [DMESG-WARN][18] ([i915#180]) +1 similar issue
   [17]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-apl7/igt@gem_softpin@noreloc-s3.html
   [18]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-apl6/igt@gem_softpin@noreloc-s3.html

  * igt@gem_userptr_blits@dmabuf-unsync:
    - shard-tglb:         NOTRUN -> [SKIP][19] ([i915#3297])
   [19]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-tglb6/igt@gem_userptr_blits@dmabuf-unsync.html
    - shard-iclb:         NOTRUN -> [SKIP][20] ([i915#3297])
   [20]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-iclb4/igt@gem_userptr_blits@dmabuf-unsync.html

  * igt@gem_userptr_blits@input-checking:
    - shard-snb:          NOTRUN -> [DMESG-WARN][21] ([i915#3002])
   [21]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-snb5/igt@gem_userptr_blits@input-checking.html

  * igt@gen9_exec_parse@allowed-single:
    - shard-skl:          [PASS][22] -> [DMESG-WARN][23] ([i915#1436] / [i915#716])
   [22]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-skl7/igt@gen9_exec_parse@allowed-single.html
   [23]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-skl2/igt@gen9_exec_parse@allowed-single.html

  * igt@kms_big_fb@yf-tiled-64bpp-rotate-90:
    - shard-iclb:         NOTRUN -> [SKIP][24] ([fdo#110723])
   [24]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-iclb4/igt@kms_big_fb@yf-tiled-64bpp-rotate-90.html

  * igt@kms_big_fb@yf-tiled-addfb-size-overflow:
    - shard-tglb:         NOTRUN -> [SKIP][25] ([fdo#111615]) +1 similar issue
   [25]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-tglb1/igt@kms_big_fb@yf-tiled-addfb-size-overflow.html

  * igt@kms_big_fb@yf-tiled-max-hw-stride-32bpp-rotate-0-hflip:
    - shard-apl:          NOTRUN -> [SKIP][26] ([fdo#109271] / [i915#3777]) +3 similar issues
   [26]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-apl3/igt@kms_big_fb@yf-tiled-max-hw-stride-32bpp-rotate-0-hflip.html

  * igt@kms_big_fb@yf-tiled-max-hw-stride-32bpp-rotate-180-async-flip:
    - shard-skl:          NOTRUN -> [FAIL][27] ([i915#3722])
   [27]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-skl10/igt@kms_big_fb@yf-tiled-max-hw-stride-32bpp-rotate-180-async-flip.html

  * igt@kms_ccs@pipe-a-bad-rotation-90-y_tiled_gen12_rc_ccs_cc:
    - shard-skl:          NOTRUN -> [SKIP][28] ([fdo#109271] / [i915#3886])
   [28]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-skl10/igt@kms_ccs@pipe-a-bad-rotation-90-y_tiled_gen12_rc_ccs_cc.html

  * igt@kms_ccs@pipe-a-ccs-on-another-bo-y_tiled_gen12_mc_ccs:
    - shard-apl:          NOTRUN -> [SKIP][29] ([fdo#109271] / [i915#3886]) +11 similar issues
   [29]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-apl1/igt@kms_ccs@pipe-a-ccs-on-another-bo-y_tiled_gen12_mc_ccs.html

  * igt@kms_ccs@pipe-b-crc-primary-rotation-180-y_tiled_gen12_rc_ccs_cc:
    - shard-glk:          NOTRUN -> [SKIP][30] ([fdo#109271] / [i915#3886])
   [30]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-glk1/igt@kms_ccs@pipe-b-crc-primary-rotation-180-y_tiled_gen12_rc_ccs_cc.html

  * igt@kms_ccs@pipe-b-random-ccs-data-y_tiled_gen12_mc_ccs:
    - shard-kbl:          NOTRUN -> [SKIP][31] ([fdo#109271] / [i915#3886])
   [31]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-kbl2/igt@kms_ccs@pipe-b-random-ccs-data-y_tiled_gen12_mc_ccs.html

  * igt@kms_ccs@pipe-d-random-ccs-data-y_tiled_gen12_mc_ccs:
    - shard-tglb:         NOTRUN -> [SKIP][32] ([i915#3689]) +2 similar issues
   [32]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-tglb3/igt@kms_ccs@pipe-d-random-ccs-data-y_tiled_gen12_mc_ccs.html

  * igt@kms_chamelium@vga-hpd:
    - shard-apl:          NOTRUN -> [SKIP][33] ([fdo#109271] / [fdo#111827]) +23 similar issues
   [33]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-apl3/igt@kms_chamelium@vga-hpd.html

  * igt@kms_chamelium@vga-hpd-fast:
    - shard-tglb:         NOTRUN -> [SKIP][34] ([fdo#109284] / [fdo#111827]) +2 similar issues
   [34]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-tglb3/igt@kms_chamelium@vga-hpd-fast.html

  * igt@kms_chamelium@vga-hpd-for-each-pipe:
    - shard-kbl:          NOTRUN -> [SKIP][35] ([fdo#109271] / [fdo#111827]) +3 similar issues
   [35]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-kbl2/igt@kms_chamelium@vga-hpd-for-each-pipe.html

  * igt@kms_color@pipe-b-ctm-0-75:
    - shard-skl:          [PASS][36] -> [DMESG-WARN][37] ([i915#1982])
   [36]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-skl8/igt@kms_color@pipe-b-ctm-0-75.html
   [37]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-skl3/igt@kms_color@pipe-b-ctm-0-75.html

  * igt@kms_color_chamelium@pipe-b-gamma:
    - shard-glk:          NOTRUN -> [SKIP][38] ([fdo#109271] / [fdo#111827])
   [38]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-glk1/igt@kms_color_chamelium@pipe-b-gamma.html

  * igt@kms_color_chamelium@pipe-c-ctm-max:
    - shard-iclb:         NOTRUN -> [SKIP][39] ([fdo#109284] / [fdo#111827])
   [39]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-iclb4/igt@kms_color_chamelium@pipe-c-ctm-max.html

  * igt@kms_color_chamelium@pipe-d-ctm-0-25:
    - shard-skl:          NOTRUN -> [SKIP][40] ([fdo#109271] / [fdo#111827]) +3 similar issues
   [40]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-skl8/igt@kms_color_chamelium@pipe-d-ctm-0-25.html

  * igt@kms_color_chamelium@pipe-invalid-ctm-matrix-sizes:
    - shard-snb:          NOTRUN -> [SKIP][41] ([fdo#109271] / [fdo#111827]) +12 similar issues
   [41]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-snb2/igt@kms_color_chamelium@pipe-invalid-ctm-matrix-sizes.html

  * igt@kms_content_protection@srm:
    - shard-apl:          NOTRUN -> [TIMEOUT][42] ([i915#1319])
   [42]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-apl1/igt@kms_content_protection@srm.html

  * igt@kms_cursor_crc@pipe-a-cursor-32x10-random:
    - shard-tglb:         NOTRUN -> [SKIP][43] ([i915#3359])
   [43]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-tglb5/igt@kms_cursor_crc@pipe-a-cursor-32x10-random.html

  * igt@kms_cursor_crc@pipe-a-cursor-max-size-sliding:
    - shard-iclb:         NOTRUN -> [SKIP][44] ([fdo#109278]) +3 similar issues
   [44]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-iclb5/igt@kms_cursor_crc@pipe-a-cursor-max-size-sliding.html

  * igt@kms_cursor_crc@pipe-c-cursor-32x32-rapid-movement:
    - shard-tglb:         NOTRUN -> [SKIP][45] ([i915#3319])
   [45]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-tglb6/igt@kms_cursor_crc@pipe-c-cursor-32x32-rapid-movement.html

  * igt@kms_cursor_crc@pipe-d-cursor-suspend:
    - shard-kbl:          NOTRUN -> [SKIP][46] ([fdo#109271]) +40 similar issues
   [46]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-kbl2/igt@kms_cursor_crc@pipe-d-cursor-suspend.html

  * igt@kms_cursor_legacy@cursorb-vs-flipb-atomic:
    - shard-iclb:         NOTRUN -> [SKIP][47] ([fdo#109274] / [fdo#109278])
   [47]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-iclb4/igt@kms_cursor_legacy@cursorb-vs-flipb-atomic.html

  * igt@kms_cursor_legacy@pipe-d-single-bo:
    - shard-skl:          NOTRUN -> [SKIP][48] ([fdo#109271] / [i915#533])
   [48]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-skl10/igt@kms_cursor_legacy@pipe-d-single-bo.html

  * igt@kms_cursor_legacy@pipe-d-torture-bo:
    - shard-kbl:          NOTRUN -> [SKIP][49] ([fdo#109271] / [i915#533])
   [49]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-kbl2/igt@kms_cursor_legacy@pipe-d-torture-bo.html

  * igt@kms_fbcon_fbt@psr-suspend:
    - shard-tglb:         [PASS][50] -> [INCOMPLETE][51] ([i915#2411] / [i915#456])
   [50]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-tglb2/igt@kms_fbcon_fbt@psr-suspend.html
   [51]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-tglb7/igt@kms_fbcon_fbt@psr-suspend.html

  * igt@kms_flip@flip-vs-expired-vblank@a-edp1:
    - shard-skl:          [PASS][52] -> [FAIL][53] ([i915#79])
   [52]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-skl2/igt@kms_flip@flip-vs-expired-vblank@a-edp1.html
   [53]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-skl3/igt@kms_flip@flip-vs-expired-vblank@a-edp1.html

  * igt@kms_flip_scaled_crc@flip-64bpp-ytile-to-32bpp-ytilercccs:
    - shard-apl:          NOTRUN -> [SKIP][54] ([fdo#109271] / [i915#2672])
   [54]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-apl6/igt@kms_flip_scaled_crc@flip-64bpp-ytile-to-32bpp-ytilercccs.html

  * igt@kms_frontbuffer_tracking@fbc-2p-primscrn-cur-indfb-move:
    - shard-iclb:         NOTRUN -> [SKIP][55] ([fdo#109280]) +4 similar issues
   [55]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-iclb8/igt@kms_frontbuffer_tracking@fbc-2p-primscrn-cur-indfb-move.html

  * igt@kms_frontbuffer_tracking@fbc-2p-scndscrn-spr-indfb-draw-pwrite:
    - shard-tglb:         NOTRUN -> [SKIP][56] ([fdo#111825]) +6 similar issues
   [56]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-tglb1/igt@kms_frontbuffer_tracking@fbc-2p-scndscrn-spr-indfb-draw-pwrite.html

  * igt@kms_frontbuffer_tracking@fbcpsr-2p-primscrn-spr-indfb-draw-mmap-gtt:
    - shard-skl:          NOTRUN -> [SKIP][57] ([fdo#109271]) +44 similar issues
   [57]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-skl10/igt@kms_frontbuffer_tracking@fbcpsr-2p-primscrn-spr-indfb-draw-mmap-gtt.html

  * igt@kms_hdr@static-toggle:
    - shard-tglb:         NOTRUN -> [SKIP][58] ([i915#1187])
   [58]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-tglb3/igt@kms_hdr@static-toggle.html

  * igt@kms_pipe_crc_basic@compare-crc-sanitycheck-pipe-d:
    - shard-apl:          NOTRUN -> [SKIP][59] ([fdo#109271] / [i915#533])
   [59]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-apl1/igt@kms_pipe_crc_basic@compare-crc-sanitycheck-pipe-d.html

  * igt@kms_pipe_crc_basic@suspend-read-crc-pipe-a:
    - shard-kbl:          [PASS][60] -> [DMESG-WARN][61] ([i915#180]) +5 similar issues
   [60]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-kbl6/igt@kms_pipe_crc_basic@suspend-read-crc-pipe-a.html
   [61]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-kbl3/igt@kms_pipe_crc_basic@suspend-read-crc-pipe-a.html

  * igt@kms_plane_alpha_blend@pipe-a-alpha-7efc:
    - shard-kbl:          NOTRUN -> [FAIL][62] ([fdo#108145] / [i915#265])
   [62]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-kbl2/igt@kms_plane_alpha_blend@pipe-a-alpha-7efc.html

  * igt@kms_plane_alpha_blend@pipe-a-alpha-opaque-fb:
    - shard-apl:          NOTRUN -> [FAIL][63] ([fdo#108145] / [i915#265]) +2 similar issues
   [63]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-apl7/igt@kms_plane_alpha_blend@pipe-a-alpha-opaque-fb.html

  * igt@kms_plane_alpha_blend@pipe-b-constant-alpha-min:
    - shard-skl:          [PASS][64] -> [FAIL][65] ([fdo#108145] / [i915#265])
   [64]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-skl4/igt@kms_plane_alpha_blend@pipe-b-constant-alpha-min.html
   [65]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-skl8/igt@kms_plane_alpha_blend@pipe-b-constant-alpha-min.html

  * igt@kms_plane_lowres@pipe-b-tiling-x:
    - shard-iclb:         NOTRUN -> [SKIP][66] ([i915#3536])
   [66]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-iclb4/igt@kms_plane_lowres@pipe-b-tiling-x.html

  * igt@kms_psr2_sf@overlay-plane-update-sf-dmg-area-3:
    - shard-kbl:          NOTRUN -> [SKIP][67] ([fdo#109271] / [i915#658]) +1 similar issue
   [67]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-kbl2/igt@kms_psr2_sf@overlay-plane-update-sf-dmg-area-3.html

  * igt@kms_psr2_sf@overlay-primary-update-sf-dmg-area-3:
    - shard-apl:          NOTRUN -> [SKIP][68] ([fdo#109271] / [i915#658]) +4 similar issues
   [68]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-apl1/igt@kms_psr2_sf@overlay-primary-update-sf-dmg-area-3.html

  * igt@kms_psr2_sf@overlay-primary-update-sf-dmg-area-4:
    - shard-tglb:         NOTRUN -> [SKIP][69] ([i915#2920]) +1 similar issue
   [69]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-tglb6/igt@kms_psr2_sf@overlay-primary-update-sf-dmg-area-4.html
    - shard-iclb:         NOTRUN -> [SKIP][70] ([i915#658])
   [70]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-iclb4/igt@kms_psr2_sf@overlay-primary-update-sf-dmg-area-4.html

  * igt@kms_psr@psr2_primary_blt:
    - shard-iclb:         [PASS][71] -> [SKIP][72] ([fdo#109441])
   [71]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-iclb2/igt@kms_psr@psr2_primary_blt.html
   [72]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-iclb7/igt@kms_psr@psr2_primary_blt.html

  * igt@kms_vblank@pipe-a-ts-continuation-suspend:
    - shard-skl:          [PASS][73] -> [INCOMPLETE][74] ([i915#198])
   [73]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-skl6/igt@kms_vblank@pipe-a-ts-continuation-suspend.html
   [74]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-skl9/igt@kms_vblank@pipe-a-ts-continuation-suspend.html

  * igt@kms_writeback@writeback-fb-id:
    - shard-apl:          NOTRUN -> [SKIP][75] ([fdo#109271] / [i915#2437])
   [75]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-apl7/igt@kms_writeback@writeback-fb-id.html

  * igt@kms_writeback@writeback-invalid-parameters:
    - shard-kbl:          NOTRUN -> [SKIP][76] ([fdo#109271] / [i915#2437])
   [76]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-kbl7/igt@kms_writeback@writeback-invalid-parameters.html

  * igt@nouveau_crc@pipe-b-ctx-flip-skip-current-frame:
    - shard-apl:          NOTRUN -> [SKIP][77] ([fdo#109271]) +299 similar issues
   [77]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-apl7/igt@nouveau_crc@pipe-b-ctx-flip-skip-current-frame.html

  * igt@sysfs_clients@fair-0:
    - shard-kbl:          NOTRUN -> [SKIP][78] ([fdo#109271] / [i915#2994])
   [78]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-kbl2/igt@sysfs_clients@fair-0.html

  * igt@sysfs_clients@pidname:
    - shard-apl:          NOTRUN -> [SKIP][79] ([fdo#109271] / [i915#2994]) +2 similar issues
   [79]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-apl1/igt@sysfs_clients@pidname.html

  * igt@sysfs_clients@split-50:
    - shard-skl:          NOTRUN -> [SKIP][80] ([fdo#109271] / [i915#2994])
   [80]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-skl10/igt@sysfs_clients@split-50.html

  
#### Possible fixes ####

  * igt@fbdev@nullptr:
    - {shard-rkl}:        [SKIP][81] ([i915#2582]) -> [PASS][82]
   [81]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-rkl-1/igt@fbdev@nullptr.html
   [82]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-rkl-6/igt@fbdev@nullptr.html

  * igt@feature_discovery@psr1:
    - {shard-rkl}:        [SKIP][83] ([i915#658]) -> [PASS][84]
   [83]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-rkl-2/igt@feature_discovery@psr1.html
   [84]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-rkl-6/igt@feature_discovery@psr1.html

  * igt@gem_eio@reset-stress:
    - {shard-rkl}:        [FAIL][85] ([i915#3115]) -> [PASS][86]
   [85]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-rkl-2/igt@gem_eio@reset-stress.html
   [86]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-rkl-6/igt@gem_eio@reset-stress.html

  * igt@gem_exec_fair@basic-none-solo@rcs0:
    - shard-kbl:          [FAIL][87] ([i915#2842]) -> [PASS][88] +1 similar issue
   [87]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-kbl4/igt@gem_exec_fair@basic-none-solo@rcs0.html
   [88]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-kbl4/igt@gem_exec_fair@basic-none-solo@rcs0.html

  * igt@gem_exec_fair@basic-pace-solo@rcs0:
    - shard-glk:          [FAIL][89] ([i915#2842]) -> [PASS][90]
   [89]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-glk4/igt@gem_exec_fair@basic-pace-solo@rcs0.html
   [90]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-glk3/igt@gem_exec_fair@basic-pace-solo@rcs0.html

  * igt@gem_exec_fair@basic-pace@bcs0:
    - shard-tglb:         [FAIL][91] ([i915#2842]) -> [PASS][92]
   [91]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-tglb3/igt@gem_exec_fair@basic-pace@bcs0.html
   [92]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-tglb6/igt@gem_exec_fair@basic-pace@bcs0.html

  * igt@gem_exec_fair@basic-pace@rcs0:
    - shard-kbl:          [SKIP][93] ([fdo#109271]) -> [PASS][94] +1 similar issue
   [93]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-kbl6/igt@gem_exec_fair@basic-pace@rcs0.html
   [94]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-kbl6/igt@gem_exec_fair@basic-pace@rcs0.html

  * igt@gem_workarounds@suspend-resume:
    - shard-tglb:         [INCOMPLETE][95] ([i915#456]) -> [PASS][96]
   [95]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-tglb7/igt@gem_workarounds@suspend-resume.html
   [96]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-tglb3/igt@gem_workarounds@suspend-resume.html

  * igt@i915_pm_backlight@fade_with_suspend:
    - {shard-rkl}:        [SKIP][97] ([i915#3012]) -> [PASS][98] +1 similar issue
   [97]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-rkl-2/igt@i915_pm_backlight@fade_with_suspend.html
   [98]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-rkl-6/igt@i915_pm_backlight@fade_with_suspend.html

  * igt@i915_pm_rpm@gem-pread:
    - {shard-rkl}:        [SKIP][99] ([fdo#109308]) -> [PASS][100]
   [99]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-rkl-2/igt@i915_pm_rpm@gem-pread.html
   [100]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-rkl-6/igt@i915_pm_rpm@gem-pread.html

  * igt@i915_pm_rps@min-max-config-idle:
    - {shard-rkl}:        [FAIL][101] ([i915#4016]) -> [PASS][102]
   [101]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-rkl-6/igt@i915_pm_rps@min-max-config-idle.html
   [102]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-rkl-1/igt@i915_pm_rps@min-max-config-idle.html

  * igt@i915_pm_rps@reset:
    - {shard-rkl}:        [FAIL][103] -> [PASS][104]
   [103]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-rkl-2/igt@i915_pm_rps@reset.html
   [104]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-rkl-6/igt@i915_pm_rps@reset.html

  * igt@kms_atomic@test-only:
    - {shard-rkl}:        [SKIP][105] ([i915#1845]) -> [PASS][106] +31 similar issues
   [105]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-rkl-2/igt@kms_atomic@test-only.html
   [106]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-rkl-6/igt@kms_atomic@test-only.html

  * igt@kms_big_fb@linear-32bpp-rotate-180:
    - shard-glk:          [DMESG-WARN][107] ([i915#118] / [i915#95]) -> [PASS][108]
   [107]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-glk9/igt@kms_big_fb@linear-32bpp-rotate-180.html
   [108]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-glk7/igt@kms_big_fb@linear-32bpp-rotate-180.html

  * igt@kms_big_fb@y-tiled-32bpp-rotate-0:
    - {shard-rkl}:        [SKIP][109] ([i915#3638]) -> [PASS][110] +3 similar issues
   [109]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-rkl-2/igt@kms_big_fb@y-tiled-32bpp-rotate-0.html
   [110]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-rkl-6/igt@kms_big_fb@y-tiled-32bpp-rotate-0.html

  * igt@kms_big_fb@y-tiled-max-hw-stride-64bpp-rotate-180:
    - {shard-rkl}:        [SKIP][111] ([i915#3721]) -> [PASS][112] +5 similar issues
   [111]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-rkl-2/igt@kms_big_fb@y-tiled-max-hw-stride-64bpp-rotate-180.html
   [112]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-rkl-6/igt@kms_big_fb@y-tiled-max-hw-stride-64bpp-rotate-180.html

  * igt@kms_color@pipe-a-ctm-0-25:
    - shard-skl:          [DMESG-WARN][113] ([i915#1982]) -> [PASS][114]
   [113]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-skl2/igt@kms_color@pipe-a-ctm-0-25.html
   [114]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-skl6/igt@kms_color@pipe-a-ctm-0-25.html

  * igt@kms_color@pipe-b-ctm-0-25:
    - {shard-rkl}:        [SKIP][115] ([i915#1149] / [i915#1849] / [i915#4070]) -> [PASS][116] +1 similar issue
   [115]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-rkl-2/igt@kms_color@pipe-b-ctm-0-25.html
   [116]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-rkl-6/igt@kms_color@pipe-b-ctm-0-25.html

  * igt@kms_cursor_crc@pipe-b-cursor-256x85-random:
    - {shard-rkl}:        [SKIP][117] ([fdo#112022] / [i915#4070]) -> [PASS][118] +12 similar issues
   [117]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-rkl-2/igt@kms_cursor_crc@pipe-b-cursor-256x85-random.html
   [118]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-rkl-6/igt@kms_cursor_crc@pipe-b-cursor-256x85-random.html

  * igt@kms_cursor_edge_walk@pipe-b-256x256-right-edge:
    - {shard-rkl}:        [SKIP][119] ([i915#1849] / [i915#4070]) -> [PASS][120] +6 similar issues
   [119]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-rkl-2/igt@kms_cursor_edge_walk@pipe-b-256x256-right-edge.html
   [120]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-rkl-6/igt@kms_cursor_edge_walk@pipe-b-256x256-right-edge.html

  * igt@kms_cursor_legacy@flip-vs-cursor-legacy:
    - {shard-rkl}:        [SKIP][121] ([fdo#111825] / [i915#4070]) -> [PASS][122] +2 similar issues
   [121]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-rkl-1/igt@kms_cursor_legacy@flip-vs-cursor-legacy.html
   [122]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-rkl-6/igt@kms_cursor_legacy@flip-vs-cursor-legacy.html

  * igt@kms_dp_aux_dev:
    - {shard-rkl}:        [SKIP][123] ([i915#1257]) -> [PASS][124]
   [123]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-rkl-1/igt@kms_dp_aux_dev.html
   [124]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-rkl-6/igt@kms_dp_aux_dev.html

  * igt@kms_draw_crc@draw-method-xrgb8888-blt-ytiled:
    - {shard-rkl}:        [SKIP][125] ([fdo#111314]) -> [PASS][126] +7 similar issues
   [125]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-rkl-2/igt@kms_draw_crc@draw-method-xrgb8888-blt-ytiled.html
   [126]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-rkl-6/igt@kms_draw_crc@draw-method-xrgb8888-blt-ytiled.html

  * igt@kms_fbcon_fbt@psr-suspend:
    - {shard-rkl}:        [SKIP][127] ([fdo#110189] / [i915#3955]) -> [PASS][128]
   [127]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-rkl-1/igt@kms_fbcon_fbt@psr-suspend.html
   [128]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-rkl-6/igt@kms_fbcon_fbt@psr-suspend.html

  * igt@kms_flip@flip-vs-expired-vblank-interruptible@b-edp1:
    - shard-skl:          [FAIL][129] ([i915#79]) -> [PASS][130] +1 similar issue
   [129]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-skl6/igt@kms_flip@flip-vs-expired-vblank-interruptible@b-edp1.html
   [130]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-skl9/igt@kms_flip@flip-vs-expired-vblank-interruptible@b-edp1.html

  * igt@kms_flip@flip-vs-expired-vblank-interruptible@c-dp1:
    - shard-kbl:          [FAIL][131] ([i915#79]) -> [PASS][132]
   [131]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-kbl4/igt@kms_flip@flip-vs-expired-vblank-interruptible@c-dp1.html
   [132]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-kbl7/igt@kms_flip@flip-vs-expired-vblank-interruptible@c-dp1.html

  * igt@kms_flip@flip-vs-expired-vblank@c-hdmi-a1:
    - shard-glk:          [FAIL][133] ([i915#79]) -> [PASS][134] +2 similar issues
   [133]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-glk8/igt@kms_flip@flip-vs-expired-vblank@c-hdmi-a1.html
   [134]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-glk1/igt@kms_flip@flip-vs-expired-vblank@c-hdmi-a1.html

  * igt@kms_flip@flip-vs-suspend-interruptible@c-dp1:
    - shard-kbl:          [DMESG-WARN][135] ([i915#180]) -> [PASS][136] +1 similar issue
   [135]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-kbl7/igt@kms_flip@flip-vs-suspend-interruptible@c-dp1.html
   [136]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-kbl2/igt@kms_flip@flip-vs-suspend-interruptible@c-dp1.html

  * igt@kms_flip@flip-vs-suspend@a-dp1:
    - shard-apl:          [DMESG-WARN][137] ([i915#180]) -> [PASS][138] +1 similar issue
   [137]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10565/shard-apl6/igt@kms_flip@flip-vs-suspend@a-dp1.html
   [138]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/shard-apl3/igt@kms_flip@flip-vs-suspend@a-dp1.html

  * igt@kms_frontbuffer_tracking@psr-1p-offscren-pri-shrfb-draw-mmap-wc:
    - {shard-rkl}:        [SKIP][139] ([i915

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/index.html

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Re: [Intel-gfx] ✗ Fi.CI.IGT: failure for Clean up GuC CI failures, simplify locking, and kernel DOC (rev11)

[Matthew Brost]

On Thu, Sep 09, 2021 at 07:13:44PM +0000, Patchwork wrote:
> Patch Details
> 
> Series:  Clean up GuC CI failures, simplify locking, and kernel DOC (rev11)
> URL:     https://patchwork.freedesktop.org/series/93704/
> State:   failure
> Details: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_21004/index.html
> 
> CI Bug Log - changes from CI_DRM_10565_full -> Patchwork_21004_full
> 
> Summary
> 
> FAILURE
> 
> Serious unknown changes coming with Patchwork_21004_full absolutely need to be
> verified manually.
> 
> If you think the reported changes have nothing to do with the changes
> introduced in Patchwork_21004_full, please notify your bug team to allow them
> to document this new failure mode, which will reduce false positives in CI.
> 
> Possible new issues
> 
> Here are the unknown changes that may have been introduced in
> Patchwork_21004_full:
> 
> IGT changes
> 
> Possible regressions
> 
>   • igt@kms_flip_scaled_crc@flip-32bpp-ytileccs-to-64bpp-ytile:
> 
>       □ shard-iclb: PASS -> SKIP
>   • igt@kms_plane@plane-panning-bottom-right-suspend@pipe-b-planes:
> 
>       □ shard-tglb: PASS -> INCOMPLETE
> 

Neither of the above seem to be related to this series and also have
similar failures in other series latety.

e.g. Below series has same failures:
https://patchwork.freedesktop.org/series/93800/

Matt

> Suppressed
> 
> The following results come from untrusted machines, tests, or statuses.
> They do not affect the overall result.
> 
>   • igt@gem_eio@hibernate:
>       □ {shard-rkl}: TIMEOUT ([i915#3811]) -> FAIL
> 
> New tests
> 
> New tests have been introduced between CI_DRM_10565_full and
> Patchwork_21004_full:
> 
> New IGT tests (1)
> 
>   • igt@i915_selftest@live@guc:
>       □ Statuses : 6 pass(s)
>       □ Exec time: [0.46, 4.86] s
> 
> Known issues
> 
> Here are the changes found in Patchwork_21004_full that come from known issues:
> 
> IGT changes
> 
> Issues hit
> 
>   • igt@gem_ctx_persistence@smoketest:
> 
>       □ shard-snb: NOTRUN -> SKIP ([fdo#109271] / [i915#1099]) +1 similar issue
>   • igt@gem_exec_fair@basic-none-vip@rcs0:
> 
>       □ shard-kbl: PASS -> FAIL ([i915#2842])
>   • igt@gem_exec_fair@basic-none@vcs1:
> 
>       □ shard-iclb: NOTRUN -> FAIL ([i915#2842])
>   • igt@gem_exec_fair@basic-pace-share@rcs0:
> 
>       □ shard-tglb: PASS -> FAIL ([i915#2842]) +1 similar issue
>   • igt@gem_exec_flush@basic-batch-kernel-default-cmd:
> 
>       □ shard-snb: NOTRUN -> SKIP ([fdo#109271]) +331 similar issues
>   • igt@gem_exec_whisper@basic-contexts-forked-all:
> 
>       □ shard-glk: PASS -> DMESG-WARN ([i915#118] / [i915#95]) +1 similar issue
>   • igt@gem_render_copy@linear-to-vebox-y-tiled:
> 
>       □ shard-glk: NOTRUN -> SKIP ([fdo#109271]) +3 similar issues
>   • igt@gem_softpin@noreloc-s3:
> 
>       □ shard-apl: PASS -> DMESG-WARN ([i915#180]) +1 similar issue
>   • igt@gem_userptr_blits@dmabuf-unsync:
> 
>       □ shard-tglb: NOTRUN -> SKIP ([i915#3297])
> 
>       □ shard-iclb: NOTRUN -> SKIP ([i915#3297])
> 
>   • igt@gem_userptr_blits@input-checking:
> 
>       □ shard-snb: NOTRUN -> DMESG-WARN ([i915#3002])
>   • igt@gen9_exec_parse@allowed-single:
> 
>       □ shard-skl: PASS -> DMESG-WARN ([i915#1436] / [i915#716])
>   • igt@kms_big_fb@yf-tiled-64bpp-rotate-90:
> 
>       □ shard-iclb: NOTRUN -> SKIP ([fdo#110723])
>   • igt@kms_big_fb@yf-tiled-addfb-size-overflow:
> 
>       □ shard-tglb: NOTRUN -> SKIP ([fdo#111615]) +1 similar issue
>   • igt@kms_big_fb@yf-tiled-max-hw-stride-32bpp-rotate-0-hflip:
> 
>       □ shard-apl: NOTRUN -> SKIP ([fdo#109271] / [i915#3777]) +3 similar
>         issues
>   • igt@kms_big_fb@yf-tiled-max-hw-stride-32bpp-rotate-180-async-flip:
> 
>       □ shard-skl: NOTRUN -> FAIL ([i915#3722])
>   • igt@kms_ccs@pipe-a-bad-rotation-90-y_tiled_gen12_rc_ccs_cc:
> 
>       □ shard-skl: NOTRUN -> SKIP ([fdo#109271] / [i915#3886])
>   • igt@kms_ccs@pipe-a-ccs-on-another-bo-y_tiled_gen12_mc_ccs:
> 
>       □ shard-apl: NOTRUN -> SKIP ([fdo#109271] / [i915#3886]) +11 similar
>         issues
>   • igt@kms_ccs@pipe-b-crc-primary-rotation-180-y_tiled_gen12_rc_ccs_cc:
> 
>       □ shard-glk: NOTRUN -> SKIP ([fdo#109271] / [i915#3886])
>   • igt@kms_ccs@pipe-b-random-ccs-data-y_tiled_gen12_mc_ccs:
> 
>       □ shard-kbl: NOTRUN -> SKIP ([fdo#109271] / [i915#3886])
>   • igt@kms_ccs@pipe-d-random-ccs-data-y_tiled_gen12_mc_ccs:
> 
>       □ shard-tglb: NOTRUN -> SKIP ([i915#3689]) +2 similar issues
>   • igt@kms_chamelium@vga-hpd:
> 
>       □ shard-apl: NOTRUN -> SKIP ([fdo#109271] / [fdo#111827]) +23 similar
>         issues
>   • igt@kms_chamelium@vga-hpd-fast:
> 
>       □ shard-tglb: NOTRUN -> SKIP ([fdo#109284] / [fdo#111827]) +2 similar
>         issues
>   • igt@kms_chamelium@vga-hpd-for-each-pipe:
> 
>       □ shard-kbl: NOTRUN -> SKIP ([fdo#109271] / [fdo#111827]) +3 similar
>         issues
>   • igt@kms_color@pipe-b-ctm-0-75:
> 
>       □ shard-skl: PASS -> DMESG-WARN ([i915#1982])
>   • igt@kms_color_chamelium@pipe-b-gamma:
> 
>       □ shard-glk: NOTRUN -> SKIP ([fdo#109271] / [fdo#111827])
>   • igt@kms_color_chamelium@pipe-c-ctm-max:
> 
>       □ shard-iclb: NOTRUN -> SKIP ([fdo#109284] / [fdo#111827])
>   • igt@kms_color_chamelium@pipe-d-ctm-0-25:
> 
>       □ shard-skl: NOTRUN -> SKIP ([fdo#109271] / [fdo#111827]) +3 similar
>         issues
>   • igt@kms_color_chamelium@pipe-invalid-ctm-matrix-sizes:
> 
>       □ shard-snb: NOTRUN -> SKIP ([fdo#109271] / [fdo#111827]) +12 similar
>         issues
>   • igt@kms_content_protection@srm:
> 
>       □ shard-apl: NOTRUN -> TIMEOUT ([i915#1319])
>   • igt@kms_cursor_crc@pipe-a-cursor-32x10-random:
> 
>       □ shard-tglb: NOTRUN -> SKIP ([i915#3359])
>   • igt@kms_cursor_crc@pipe-a-cursor-max-size-sliding:
> 
>       □ shard-iclb: NOTRUN -> SKIP ([fdo#109278]) +3 similar issues
>   • igt@kms_cursor_crc@pipe-c-cursor-32x32-rapid-movement:
> 
>       □ shard-tglb: NOTRUN -> SKIP ([i915#3319])
>   • igt@kms_cursor_crc@pipe-d-cursor-suspend:
> 
>       □ shard-kbl: NOTRUN -> SKIP ([fdo#109271]) +40 similar issues
>   • igt@kms_cursor_legacy@cursorb-vs-flipb-atomic:
> 
>       □ shard-iclb: NOTRUN -> SKIP ([fdo#109274] / [fdo#109278])
>   • igt@kms_cursor_legacy@pipe-d-single-bo:
> 
>       □ shard-skl: NOTRUN -> SKIP ([fdo#109271] / [i915#533])
>   • igt@kms_cursor_legacy@pipe-d-torture-bo:
> 
>       □ shard-kbl: NOTRUN -> SKIP ([fdo#109271] / [i915#533])
>   • igt@kms_fbcon_fbt@psr-suspend:
> 
>       □ shard-tglb: PASS -> INCOMPLETE ([i915#2411] / [i915#456])
>   • igt@kms_flip@flip-vs-expired-vblank@a-edp1:
> 
>       □ shard-skl: PASS -> FAIL ([i915#79])
>   • igt@kms_flip_scaled_crc@flip-64bpp-ytile-to-32bpp-ytilercccs:
> 
>       □ shard-apl: NOTRUN -> SKIP ([fdo#109271] / [i915#2672])
>   • igt@kms_frontbuffer_tracking@fbc-2p-primscrn-cur-indfb-move:
> 
>       □ shard-iclb: NOTRUN -> SKIP ([fdo#109280]) +4 similar issues
>   • igt@kms_frontbuffer_tracking@fbc-2p-scndscrn-spr-indfb-draw-pwrite:
> 
>       □ shard-tglb: NOTRUN -> SKIP ([fdo#111825]) +6 similar issues
>   • igt@kms_frontbuffer_tracking@fbcpsr-2p-primscrn-spr-indfb-draw-mmap-gtt:
> 
>       □ shard-skl: NOTRUN -> SKIP ([fdo#109271]) +44 similar issues
>   • igt@kms_hdr@static-toggle:
> 
>       □ shard-tglb: NOTRUN -> SKIP ([i915#1187])
>   • igt@kms_pipe_crc_basic@compare-crc-sanitycheck-pipe-d:
> 
>       □ shard-apl: NOTRUN -> SKIP ([fdo#109271] / [i915#533])
>   • igt@kms_pipe_crc_basic@suspend-read-crc-pipe-a:
> 
>       □ shard-kbl: PASS -> DMESG-WARN ([i915#180]) +5 similar issues
>   • igt@kms_plane_alpha_blend@pipe-a-alpha-7efc:
> 
>       □ shard-kbl: NOTRUN -> FAIL ([fdo#108145] / [i915#265])
>   • igt@kms_plane_alpha_blend@pipe-a-alpha-opaque-fb:
> 
>       □ shard-apl: NOTRUN -> FAIL ([fdo#108145] / [i915#265]) +2 similar issues
>   • igt@kms_plane_alpha_blend@pipe-b-constant-alpha-min:
> 
>       □ shard-skl: PASS -> FAIL ([fdo#108145] / [i915#265])
>   • igt@kms_plane_lowres@pipe-b-tiling-x:
> 
>       □ shard-iclb: NOTRUN -> SKIP ([i915#3536])
>   • igt@kms_psr2_sf@overlay-plane-update-sf-dmg-area-3:
> 
>       □ shard-kbl: NOTRUN -> SKIP ([fdo#109271] / [i915#658]) +1 similar issue
>   • igt@kms_psr2_sf@overlay-primary-update-sf-dmg-area-3:
> 
>       □ shard-apl: NOTRUN -> SKIP ([fdo#109271] / [i915#658]) +4 similar issues
>   • igt@kms_psr2_sf@overlay-primary-update-sf-dmg-area-4:
> 
>       □ shard-tglb: NOTRUN -> SKIP ([i915#2920]) +1 similar issue
> 
>       □ shard-iclb: NOTRUN -> SKIP ([i915#658])
> 
>   • igt@kms_psr@psr2_primary_blt:
> 
>       □ shard-iclb: PASS -> SKIP ([fdo#109441])
>   • igt@kms_vblank@pipe-a-ts-continuation-suspend:
> 
>       □ shard-skl: PASS -> INCOMPLETE ([i915#198])
>   • igt@kms_writeback@writeback-fb-id:
> 
>       □ shard-apl: NOTRUN -> SKIP ([fdo#109271] / [i915#2437])
>   • igt@kms_writeback@writeback-invalid-parameters:
> 
>       □ shard-kbl: NOTRUN -> SKIP ([fdo#109271] / [i915#2437])
>   • igt@nouveau_crc@pipe-b-ctx-flip-skip-current-frame:
> 
>       □ shard-apl: NOTRUN -> SKIP ([fdo#109271]) +299 similar issues
>   • igt@sysfs_clients@fair-0:
> 
>       □ shard-kbl: NOTRUN -> SKIP ([fdo#109271] / [i915#2994])
>   • igt@sysfs_clients@pidname:
> 
>       □ shard-apl: NOTRUN -> SKIP ([fdo#109271] / [i915#2994]) +2 similar
>         issues
>   • igt@sysfs_clients@split-50:
> 
>       □ shard-skl: NOTRUN -> SKIP ([fdo#109271] / [i915#2994])
> 
> Possible fixes
> 
>   • igt@fbdev@nullptr:
> 
>       □ {shard-rkl}: SKIP ([i915#2582]) -> PASS
>   • igt@feature_discovery@psr1:
> 
>       □ {shard-rkl}: SKIP ([i915#658]) -> PASS
>   • igt@gem_eio@reset-stress:
> 
>       □ {shard-rkl}: FAIL ([i915#3115]) -> PASS
>   • igt@gem_exec_fair@basic-none-solo@rcs0:
> 
>       □ shard-kbl: FAIL ([i915#2842]) -> PASS +1 similar issue
>   • igt@gem_exec_fair@basic-pace-solo@rcs0:
> 
>       □ shard-glk: FAIL ([i915#2842]) -> PASS
>   • igt@gem_exec_fair@basic-pace@bcs0:
> 
>       □ shard-tglb: FAIL ([i915#2842]) -> PASS
>   • igt@gem_exec_fair@basic-pace@rcs0:
> 
>       □ shard-kbl: SKIP ([fdo#109271]) -> PASS +1 similar issue
>   • igt@gem_workarounds@suspend-resume:
> 
>       □ shard-tglb: INCOMPLETE ([i915#456]) -> PASS
>   • igt@i915_pm_backlight@fade_with_suspend:
> 
>       □ {shard-rkl}: SKIP ([i915#3012]) -> PASS +1 similar issue
>   • igt@i915_pm_rpm@gem-pread:
> 
>       □ {shard-rkl}: SKIP ([fdo#109308]) -> PASS
>   • igt@i915_pm_rps@min-max-config-idle:
> 
>       □ {shard-rkl}: FAIL ([i915#4016]) -> PASS
>   • igt@i915_pm_rps@reset:
> 
>       □ {shard-rkl}: FAIL -> PASS
>   • igt@kms_atomic@test-only:
> 
>       □ {shard-rkl}: SKIP ([i915#1845]) -> PASS +31 similar issues
>   • igt@kms_big_fb@linear-32bpp-rotate-180:
> 
>       □ shard-glk: DMESG-WARN ([i915#118] / [i915#95]) -> PASS
>   • igt@kms_big_fb@y-tiled-32bpp-rotate-0:
> 
>       □ {shard-rkl}: SKIP ([i915#3638]) -> PASS +3 similar issues
>   • igt@kms_big_fb@y-tiled-max-hw-stride-64bpp-rotate-180:
> 
>       □ {shard-rkl}: SKIP ([i915#3721]) -> PASS +5 similar issues
>   • igt@kms_color@pipe-a-ctm-0-25:
> 
>       □ shard-skl: DMESG-WARN ([i915#1982]) -> PASS
>   • igt@kms_color@pipe-b-ctm-0-25:
> 
>       □ {shard-rkl}: SKIP ([i915#1149] / [i915#1849] / [i915#4070]) -> PASS +1
>         similar issue
>   • igt@kms_cursor_crc@pipe-b-cursor-256x85-random:
> 
>       □ {shard-rkl}: SKIP ([fdo#112022] / [i915#4070]) -> PASS +12 similar
>         issues
>   • igt@kms_cursor_edge_walk@pipe-b-256x256-right-edge:
> 
>       □ {shard-rkl}: SKIP ([i915#1849] / [i915#4070]) -> PASS +6 similar issues
>   • igt@kms_cursor_legacy@flip-vs-cursor-legacy:
> 
>       □ {shard-rkl}: SKIP ([fdo#111825] / [i915#4070]) -> PASS +2 similar
>         issues
>   • igt@kms_dp_aux_dev:
> 
>       □ {shard-rkl}: SKIP ([i915#1257]) -> PASS
>   • igt@kms_draw_crc@draw-method-xrgb8888-blt-ytiled:
> 
>       □ {shard-rkl}: SKIP ([fdo#111314]) -> PASS +7 similar issues
>   • igt@kms_fbcon_fbt@psr-suspend:
> 
>       □ {shard-rkl}: SKIP ([fdo#110189] / [i915#3955]) -> PASS
>   • igt@kms_flip@flip-vs-expired-vblank-interruptible@b-edp1:
> 
>       □ shard-skl: FAIL ([i915#79]) -> PASS +1 similar issue
>   • igt@kms_flip@flip-vs-expired-vblank-interruptible@c-dp1:
> 
>       □ shard-kbl: FAIL ([i915#79]) -> PASS
>   • igt@kms_flip@flip-vs-expired-vblank@c-hdmi-a1:
> 
>       □ shard-glk: FAIL ([i915#79]) -> PASS +2 similar issues
>   • igt@kms_flip@flip-vs-suspend-interruptible@c-dp1:
> 
>       □ shard-kbl: DMESG-WARN ([i915#180]) -> PASS +1 similar issue
>   • igt@kms_flip@flip-vs-suspend@a-dp1:
> 
>       □ shard-apl: DMESG-WARN ([i915#180]) -> PASS +1 similar issue
>   • igt@kms_frontbuffer_tracking@psr-1p-offscren-pri-shrfb-draw-mmap-wc:
> 
>       □ {shard-rkl}: [SKIP][139] ([i915
> 
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