[PATCH 1/1] drm/amdkfd: Fix unaligned doorbell absolute offset for gfx8

[Arvind Yadav]

This patch is to adjust the absolute doorbell offset
against the doorbell id considering the doorbell
size of 32/64 bit.

Cc: Christian Koenig <christian.koenig at amd.com>
Cc: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: Shashank Sharma <shashank.sharma at amd.com>
Signed-off-by: Arvind Yadav <Arvind.Yadav at amd.com>
---
 drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
index 0d3d538b64eb..c327f7f604d7 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
@@ -407,7 +407,16 @@ static int allocate_doorbell(struct qcm_process_device *qpd,
 
 	q->properties.doorbell_off = amdgpu_doorbell_index_on_bar(dev->adev,
 								  qpd->proc_doorbells,
-								  q->doorbell_id);
+								  0);
+
+	/* Adjust the absolute doorbell offset against the doorbell id considering
+	 * the doorbell size of 32/64 bit.
+	 */
+	if (!KFD_IS_SOC15(dev))
+		q->properties.doorbell_off += q->doorbell_id;
+	else
+		q->properties.doorbell_off += q->doorbell_id * 2;
+
 	return 0;
 }
 
-- 
2.34.1