drm/nouveau/acr: implement new subdev to replace "secure boot"

ACR is responsible for managing the firmware for LS (Low Secure) falcons,
this was previously handled in the driver by SECBOOT.

This rewrite started from some test code that attempted to replicate the
procedure RM uses in order to debug early Turing ACR firmwares that were
provided by NVIDIA for development.

Compared with SECBOOT, the code is structured into more individual steps,
with the aim of making the process easier to follow/debug, whilst making
it possible to support newer firmware versions that may have a different
binary format or API interface.

The HS (High Secure) binary(s) are now booted earlier in device init, to
match the behaviour of RM, whereas SECBOOT would delay this until we try
to boot the first LS falcon.

There's also additional debugging features available, with the intention
of making it easier to solve issues during FW/HW bring-up in the future.

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

drivers/gpu/drm/nouveau/nvkm/subdev/pmu/priv.h

@@ -5,6 +5,7 @@
 #include <subdev/pmu.h>
 #include <subdev/pmu/fuc/os.h>
 enum nvkm_acr_lsf_id;
+struct nvkm_acr_lsfw;
 
 struct nvkm_pmu_func {
 	const struct nvkm_falcon_func *flcn;
@@ -43,6 +44,9 @@ void gf100_pmu_reset(struct nvkm_pmu *);
 
 void gk110_pmu_pgob(struct nvkm_pmu *, bool);
 
+void gm20b_pmu_acr_bld_patch(struct nvkm_acr *, u32, s64);
+void gm20b_pmu_acr_bld_write(struct nvkm_acr *, u32, struct nvkm_acr_lsfw *);
+int gm20b_pmu_acr_boot(struct nvkm_falcon *);
 int gm20b_pmu_acr_bootstrap_falcon(struct nvkm_falcon *, enum nvkm_acr_lsf_id);
 void gm20b_pmu_recv(struct nvkm_pmu *);
 int gm20b_pmu_initmsg(struct nvkm_pmu *);