[PATCH 1/5] drm/xe/multi_queue: Store primary queue and position info in LRC

[Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>]

Given an LRC belonging to the secondary queue, in order to check if its
context group is active, we need to check the LRC of the primary queue.
In addition to that we want to compare the secondary queue position to
CSMQDEBUG register to check if the queue itself is active.

To do so, store primary queue and position information int the LRC.

Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
---
 drivers/gpu/drm/xe/xe_exec_queue.c |  8 +++++++-
 drivers/gpu/drm/xe/xe_lrc.h        |  5 +++++
 drivers/gpu/drm/xe/xe_lrc_types.h  | 10 ++++++++++
 3 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/xe/xe_exec_queue.c b/drivers/gpu/drm/xe/xe_exec_queue.c
index b287d0e0e60a..4fb02eda77b4 100644
--- a/drivers/gpu/drm/xe/xe_exec_queue.c
+++ b/drivers/gpu/drm/xe/xe_exec_queue.c
@@ -275,8 +275,14 @@ static void xe_exec_queue_set_lrc(struct xe_exec_queue *q, struct xe_lrc *lrc, u
 {
 	xe_assert(gt_to_xe(q->gt), idx < q->width);
 
-	scoped_guard(spinlock, &q->lrc_lookup_lock)
+	scoped_guard(spinlock, &q->lrc_lookup_lock) {
 		q->lrc[idx] = lrc;
+		if (xe_exec_queue_is_multi_queue(q)) {
+			lrc->multi_queue.primary = q->multi_queue.group->primary;
+			lrc->multi_queue.pos = q->multi_queue.pos;
+			lrc->multi_queue.valid = 1;
+		}
+	}
 }
 
 /**
diff --git a/drivers/gpu/drm/xe/xe_lrc.h b/drivers/gpu/drm/xe/xe_lrc.h
index e7c975f9e2d9..b544c8169967 100644
--- a/drivers/gpu/drm/xe/xe_lrc.h
+++ b/drivers/gpu/drm/xe/xe_lrc.h
@@ -90,6 +90,11 @@ static inline size_t xe_lrc_ring_size(void)
 	return SZ_16K;
 }
 
+static inline bool xe_lrc_is_multi_queue(struct xe_lrc *lrc)
+{
+	return lrc->multi_queue.valid;
+}
+
 size_t xe_gt_lrc_hang_replay_size(struct xe_gt *gt, enum xe_engine_class class);
 size_t xe_gt_lrc_size(struct xe_gt *gt, enum xe_engine_class class);
 u32 xe_lrc_pphwsp_offset(struct xe_lrc *lrc);
diff --git a/drivers/gpu/drm/xe/xe_lrc_types.h b/drivers/gpu/drm/xe/xe_lrc_types.h
index 5a718f759ed6..93972536214a 100644
--- a/drivers/gpu/drm/xe/xe_lrc_types.h
+++ b/drivers/gpu/drm/xe/xe_lrc_types.h
@@ -63,6 +63,16 @@ struct xe_lrc {
 
 	/** @ctx_timestamp: readout value of CTX_TIMESTAMP on last update */
 	u64 ctx_timestamp;
+
+	/** @multi_queue: Multi queue LRC related information */
+	struct {
+		/** @multi_queue.primary: Primary queue corresponding to this LRC */
+		struct xe_exec_queue *primary;
+		/** @multi_queue.valid: LRC belongs to a multi queue group */
+		u8 valid;
+		/** @multi_queue.pos: Position of LRC within the multi-queue group */
+		u8 pos;
+	} multi_queue;
 };
 
 struct xe_lrc_snapshot;
-- 
2.43.0