From: Jay Cornwall <jay.cornw...@amd.com>
CP microcode uses undocumented bits in this register to record queue
state information. The KFD zeroes these bits in update_mqd, when invoked
through the UPDATE_QUEUE ioctl, causing incoherent state when the ioctl
is used to successively unmap and map a queue.
Since the queue type cannot be changed in this path, move the MQD write
to init_mqd.
Signed-off-by: Jay Cornwall <jay.cornwall at amd.com>
Reviewed-by: Ben Goz <ben.goz at amd.com>
Signed-off-by: Oded Gabbay <oded.gabbay at amd.com>
---
drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_cik.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_cik.c
b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_cik.c
index a318743..a09e18a 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_cik.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_cik.c
@@ -94,6 +94,9 @@ static int init_mqd(struct mqd_manager *mm, void **mqd,
m->cp_hqd_pipe_priority = 1;
m->cp_hqd_queue_priority = 15;
+ if (q->format == KFD_QUEUE_FORMAT_AQL)
+ m->cp_hqd_iq_rptr = AQL_ENABLE;
+
*mqd = m;
if (gart_addr != NULL)
*gart_addr = addr;
@@ -187,7 +190,6 @@ static int update_mqd(struct mqd_manager *mm, void *mqd,
m->cp_hqd_vmid = q->vmid;
if (q->format == KFD_QUEUE_FORMAT_AQL) {
- m->cp_hqd_iq_rptr = AQL_ENABLE;
m->cp_hqd_pq_control |= NO_UPDATE_RPTR;
}
--
1.9.1
