drm/nouveau/secboot: disable falcon interrupts when running blob

Make sure we are not disturbed by spurious interrupts, as we poll the
halt bit anyway.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/secboot/gm200.c b/drivers/gpu/drm/nouveau/nvkm/subdev/secboot/gm200.c
index f6a11e2..2fcb2f7 100644 (file)
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/secboot/gm200.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/secboot/gm200.c
@@ -27,6 +27,7 @@
 #include <core/gpuobj.h>
 #include <subdev/fb.h>
 #include <engine/falcon.h>
+#include <subdev/mc.h>
 
 /**
  * gm200_secboot_run_blob() - run the given high-secure blob
@@ -63,6 +64,9 @@ gm200_secboot_run_blob(struct nvkm_secboot *sb, struct nvkm_gpuobj *blob)
        if (ret)
                goto end;
 
+       /* Disable interrupts as we will poll for the HALT bit */
+       nvkm_mc_intr_mask(sb->subdev.device, falcon->owner->index, false);
+
        /* Start the HS bootloader */
        nvkm_falcon_set_start_addr(falcon, sb->acr->start_address);
        nvkm_falcon_start(falcon);
@@ -79,6 +83,9 @@ gm200_secboot_run_blob(struct nvkm_secboot *sb, struct nvkm_gpuobj *blob)
        }
 
 end:
+       /* Reenable interrupts */
+       nvkm_mc_intr_mask(sb->subdev.device, falcon->owner->index, true);
+
        /* We don't need the ACR firmware anymore */
        nvkm_gpuobj_unmap(&vma);
        nvkm_falcon_put(falcon, subdev);