[PATCH] drm/amdkfd: Load mqd to hqd in non-HWS mode

[Oded Gabbay]

From: Ben Goz <ben....@amd.com>

This patch fixes a bug in DQM, where the MQD of a newly created compute queue
is not loaded to an HQD slot. As a result, the CP never reads packets from this
queue.

This bug happens only in non-HWS (hardware scheduling) mode. In HWS mode, the
CP is responsible of loading MQDs to HQDs slots.

Signed-off-by: Ben Goz <ben.goz at amd.com>
Reviewed-by: Oded Gabbay <oded.gabbay at amd.com>
---
 drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

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 f44d673..3b08ed6 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
@@ -272,6 +272,18 @@ static int create_compute_queue_nocpsch(struct 
device_queue_manager *dqm,
                return retval;
        }

+       pr_debug("kfd: loading mqd to hqd on pipe (%d) queue (%d)\n",
+                       q->pipe,
+                       q->queue);
+
+       retval = mqd->load_mqd(mqd, q->mqd, q->pipe,
+                       q->queue, q->properties.write_ptr);
+       if (retval != 0) {
+               deallocate_hqd(dqm, q);
+               mqd->uninit_mqd(mqd, q->mqd, q->mqd_mem_obj);
+               return retval;
+       }
+
        return 0;
 }

-- 
2.1.0