[PATCH v2 4/5] drm/xe: memirq handler changes

[Ilia Levi]

This patch exposes an interrupt processing handler for a single hw engine.
This handler also caters for the new "reports to engine instance 0" mode.
Use this handler from the VF use-case as well.

Signed-off-by: Ilia Levi <ilia.levi at intel.com>
Reviewed-by: Jonathan Cavitt <jonathan.cavitt at intel.com>
---
 drivers/gpu/drm/xe/xe_memirq.c | 31 ++++++++++++++++++++++++-------
 drivers/gpu/drm/xe/xe_memirq.h |  1 +
 2 files changed, 25 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_memirq.c b/drivers/gpu/drm/xe/xe_memirq.c
index a1d4bc3f9e42..c388e480b5c8 100644
--- a/drivers/gpu/drm/xe/xe_memirq.c
+++ b/drivers/gpu/drm/xe/xe_memirq.c
@@ -383,6 +383,28 @@ static void memirq_dispatch_guc(struct xe_memirq *memirq, struct iosys_map *stat
 		xe_guc_irq_handler(guc, GUC_INTR_GUC2HOST);
 }
 
+/**
+ * xe_memirq_hwe_handler - Check and process interrupts for a specific HW engine.
+ * @memirq: the &xe_memirq
+ * @hwe: the hw engine to process
+ *
+ * This function reads and dispatches `Memory Based Interrupts` for the provided HW engine.
+ */
+void xe_memirq_hwe_handler(struct xe_memirq *memirq, struct xe_hw_engine *hwe)
+{
+	u16 offset = memirq->reports_to_e0 ? hwe->e0_irq_offset : hwe->irq_offset;
+	u16 instance = memirq->reports_to_e0 ? hwe->instance : 0;
+
+	struct iosys_map src_offset = IOSYS_MAP_INIT_OFFSET(&memirq->bo->vmap,
+							    XE_MEMIRQ_SOURCE_OFFSET(instance));
+	if (memirq_received(memirq, &src_offset, offset, "SRC")) {
+		struct iosys_map status_offset =
+			IOSYS_MAP_INIT_OFFSET(&memirq->bo->vmap,
+					      XE_MEMIRQ_STATUS_OFFSET(instance) + offset * SZ_16);
+		memirq_dispatch_engine(memirq, &status_offset, hwe);
+	}
+}
+
 /**
  * xe_memirq_handler - The `Memory Based Interrupts`_ Handler.
  * @memirq: the &xe_memirq
@@ -410,13 +432,8 @@ void xe_memirq_handler(struct xe_memirq *memirq)
 		if (gt->tile != tile)
 			continue;
 
-		for_each_hw_engine(hwe, gt, id) {
-			if (memirq_received(memirq, &memirq->source, hwe->irq_offset, "SRC")) {
-				map = IOSYS_MAP_INIT_OFFSET(&memirq->status,
-							    hwe->irq_offset * SZ_16);
-				memirq_dispatch_engine(memirq, &map, hwe);
-			}
-		}
+		for_each_hw_engine(hwe, gt, id)
+			xe_memirq_hwe_handler(memirq, hwe);
 	}
 
 	/* GuC and media GuC (if present) must be checked separately */
diff --git a/drivers/gpu/drm/xe/xe_memirq.h b/drivers/gpu/drm/xe/xe_memirq.h
index 98e2b61ef973..8a9334482a9b 100644
--- a/drivers/gpu/drm/xe/xe_memirq.h
+++ b/drivers/gpu/drm/xe/xe_memirq.h
@@ -20,6 +20,7 @@ u32 xe_memirq_enable_ptr(struct xe_memirq *memirq);
 
 void xe_memirq_reset(struct xe_memirq *memirq);
 void xe_memirq_postinstall(struct xe_memirq *memirq);
+void xe_memirq_hwe_handler(struct xe_memirq *memirq, struct xe_hw_engine *hwe);
 void xe_memirq_handler(struct xe_memirq *memirq);
 
 int xe_memirq_init_guc(struct xe_memirq *memirq, struct xe_guc *guc);
-- 
2.43.2