drm/nouveau/fifo: expose function to read engine ctxsw status

Needed to support Ampere differences in gr/gf100-:

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/include/nvkm/engine/fifo.h b/drivers/gpu/drm/nouveau/include/nvkm/engine/fifo.h
index 4825403..221abd6 100644 (file)
--- a/drivers/gpu/drm/nouveau/include/nvkm/engine/fifo.h
+++ b/drivers/gpu/drm/nouveau/include/nvkm/engine/fifo.h
@@ -75,6 +75,7 @@ struct nvkm_fifo {
 void nvkm_fifo_fault(struct nvkm_fifo *, struct nvkm_fault_data *);
 void nvkm_fifo_pause(struct nvkm_fifo *, unsigned long *);
 void nvkm_fifo_start(struct nvkm_fifo *, unsigned long *);
+bool nvkm_fifo_ctxsw_in_progress(struct nvkm_engine *);
 
 int nv04_fifo_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_fifo **);
 int nv10_fifo_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_fifo **);

diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/base.c b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/base.c
index abce1ec..5ea9a2f 100644 (file)
--- a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/base.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/base.c
@@ -35,6 +35,22 @@
 #include <nvif/cl0080.h>
 #include <nvif/unpack.h>
 
+bool
+nvkm_fifo_ctxsw_in_progress(struct nvkm_engine *engine)
+{
+       struct nvkm_runl *runl;
+       struct nvkm_engn *engn;
+
+       nvkm_runl_foreach(runl, engine->subdev.device->fifo) {
+               nvkm_runl_foreach_engn(engn, runl) {
+                       if (engn->engine == engine)
+                               return engn->func->chsw ? engn->func->chsw(engn) : false;
+               }
+       }
+
+       return false;
+}
+
 void
 nvkm_fifo_pause(struct nvkm_fifo *fifo, unsigned long *flags)
 {

diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/gr/gf100.c b/drivers/gpu/drm/nouveau/nvkm/engine/gr/gf100.c
index 1a5ec36..acc7a74 100644 (file)
--- a/drivers/gpu/drm/nouveau/nvkm/engine/gr/gf100.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/gr/gf100.c
@@ -1003,7 +1003,7 @@ gf100_gr_wait_idle(struct gf100_gr *gr)
                nvkm_rd32(device, 0x400700);
 
                gr_enabled = nvkm_rd32(device, 0x200) & 0x1000;
-               ctxsw_active = nvkm_rd32(device, 0x2640) & 0x8000;
+               ctxsw_active = nvkm_fifo_ctxsw_in_progress(&gr->base.engine);
                gr_busy = nvkm_rd32(device, 0x40060c) & 0x1;
 
                if (!gr_enabled || (!gr_busy && !ctxsw_active))