drm/amdkfd: Preserve CP_MQD_IQ_RPTR internal state
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@amd.com>
Reviewed-by: Ben Goz <ben.goz@amd.com>
Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>
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 @@
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 @@
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;
}