[PATCH 10/13] drm/xe/memirq: Introduce helper to calculate status vector offset

[Michal Wajdeczko <michal.wajdeczko@intel.com>]

We already have XE_MEMIRQ_STATUS_OFFSET() macro, but it expects
that instance parameter will separately prepared based on the
MSI-X status. Add memirq_status_vector_offset() helper function
that will take care of this and by using engine specific offset,
return an offset to the engine's status vector bytes.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
---
 drivers/gpu/drm/xe/xe_memirq.c | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_memirq.c b/drivers/gpu/drm/xe/xe_memirq.c
index 113b792d373e..f5e139f4525b 100644
--- a/drivers/gpu/drm/xe/xe_memirq.c
+++ b/drivers/gpu/drm/xe/xe_memirq.c
@@ -289,13 +289,25 @@ u32 xe_memirq_source_ptr(struct xe_memirq *memirq, struct xe_hw_engine *hwe)
 	return __memirq_source_page(memirq, hwe->instance);
 }
 
+/* Return: offset to the status vector used by the given @source's nth @instance */
+static u32 memirq_status_vector_offset(struct xe_memirq *memirq, u16 source, u16 instance)
+{
+	memirq_assert(memirq, instance <= XE_HW_ENGINE_MAX_INSTANCE);
+
+	instance = hw_reports_to_instance_zero(memirq) ? instance : 0;
+	return XE_MEMIRQ_STATUS_OFFSET(instance) + source * SZ_16;
+}
+
+static u32 memirq_status_page_offset(struct xe_memirq *memirq, u16 instance)
+{
+	return memirq_status_vector_offset(memirq, 0, instance);
+}
+
 static u32 __memirq_status_page(struct xe_memirq *memirq, u16 instance)
 {
-	memirq_assert(memirq, instance <= XE_HW_ENGINE_MAX_INSTANCE);
 	memirq_assert(memirq, memirq->bo);
 
-	instance = hw_reports_to_instance_zero(memirq) ? instance : 0;
-	return xe_bo_ggtt_addr(memirq->bo) + XE_MEMIRQ_STATUS_OFFSET(instance);
+	return xe_bo_ggtt_addr(memirq->bo) + memirq_status_page_offset(memirq, instance);
 }
 
 /**
-- 
2.47.1