drm/nouveau/pmu/gm20b: add msgqueue support

gm20b PMU firmware is driven by a msgqueue, so connect relevant PMU
hooks to their msgqueue counterparts.
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nvkm/subdev/pmu/gm20b.c

@@ -20,15 +20,30 @@
  * DEALINGS IN THE SOFTWARE.
  */
 
+#include <engine/falcon.h>
+#include <core/msgqueue.h>
 #include "priv.h"
 
+static void
+gm20b_pmu_recv(struct nvkm_pmu *pmu)
+{
+	nvkm_msgqueue_recv(pmu->queue);
+}
+
 static const struct nvkm_pmu_func
 gm20b_pmu = {
-	.reset = gt215_pmu_reset,
+	.intr = gt215_pmu_intr,
+	.recv = gm20b_pmu_recv,
 };
 
 int
 gm20b_pmu_new(struct nvkm_device *device, int index, struct nvkm_pmu **ppmu)
 {
-	return nvkm_pmu_new_(&gm20b_pmu, device, index, ppmu);
+	int ret;
+
+	ret = nvkm_pmu_new_(&gm20b_pmu, device, index, ppmu);
+	if (ret)
+		return ret;
+
+	return 0;
 }