drm/nouveau/flcn: reset sec2/gsp falcons harder

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/include/nvkm/core/falcon.h

@@ -19,4 +19,5 @@ int nvkm_falcon_v1_enable(struct nvkm_falcon *);
 void nvkm_falcon_v1_disable(struct nvkm_falcon *);
 
 void gp102_sec2_flcn_bind_context(struct nvkm_falcon *, struct nvkm_memory *);
+int gp102_sec2_flcn_enable(struct nvkm_falcon *);
 #endif

drivers/gpu/drm/nouveau/include/nvkm/engine/falcon.h

@@ -92,6 +92,7 @@ struct nvkm_falcon_func {
 	void (*start)(struct nvkm_falcon *);
 	int (*enable)(struct nvkm_falcon *falcon);
 	void (*disable)(struct nvkm_falcon *falcon);
+	int (*reset)(struct nvkm_falcon *);
 
 	struct {
 		u32 head;

drivers/gpu/drm/nouveau/nvkm/engine/sec2/gp102.c

@@ -47,6 +47,15 @@ gp102_sec2_intr(struct nvkm_sec2 *sec2)
 	}
 }
 
+int
+gp102_sec2_flcn_enable(struct nvkm_falcon *falcon)
+{
+	nvkm_falcon_mask(falcon, 0x3c0, 0x00000001, 0x00000001);
+	udelay(10);
+	nvkm_falcon_mask(falcon, 0x3c0, 0x00000001, 0x00000000);
+	return nvkm_falcon_v1_enable(falcon);
+}
+
 void
 gp102_sec2_flcn_bind_context(struct nvkm_falcon *falcon,
 			     struct nvkm_memory *ctx)
@@ -99,7 +108,7 @@ gp102_sec2_flcn = {
 	.clear_interrupt = nvkm_falcon_v1_clear_interrupt,
 	.set_start_addr = nvkm_falcon_v1_set_start_addr,
 	.start = nvkm_falcon_v1_start,
-	.enable = nvkm_falcon_v1_enable,
+	.enable = gp102_sec2_flcn_enable,
 	.disable = nvkm_falcon_v1_disable,
 	.cmdq = { 0xa00, 0xa04, 8 },
 	.msgq = { 0xa30, 0xa34, 8 },

drivers/gpu/drm/nouveau/nvkm/subdev/gsp/gv100.c

@@ -32,7 +32,7 @@ gv100_gsp_flcn = {
 	.clear_interrupt = nvkm_falcon_v1_clear_interrupt,
 	.set_start_addr = nvkm_falcon_v1_set_start_addr,
 	.start = nvkm_falcon_v1_start,
-	.enable = nvkm_falcon_v1_enable,
+	.enable = gp102_sec2_flcn_enable,
 	.disable = nvkm_falcon_v1_disable,
 };