drm/nouveau/secboot: get start address of blob from ACR

The start address used for secure blobs is not unique to the ACR, but
rather blob-dependent. Remove the unique member stored in the ACR
structure and make the load function return the start address for the
current blob instead.
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nvkm/subdev/secboot/acr.h

@@ -49,7 +49,6 @@ struct nvkm_acr_func {
  * @boot_falcon: ID of the falcon that will perform secure boot
  * @managed_falcons: bitfield of falcons managed by this ACR
  * @optional_falcons: bitfield of falcons we can live without
- * @start_address: virtual start address of the HS bootloader
  */
 struct nvkm_acr {
 	const struct nvkm_acr_func *func;
@@ -58,7 +57,6 @@ struct nvkm_acr {
 	enum nvkm_secboot_falcon boot_falcon;
 	unsigned long managed_falcons;
 	unsigned long optional_falcons;
-	u32 start_address;
 };
 
 void *nvkm_acr_load_firmware(const struct nvkm_subdev *, const char *, size_t);

drivers/gpu/drm/nouveau/nvkm/subdev/secboot/acr_r352.c

@@ -754,9 +754,6 @@ acr_r352_prepare_hsbl_blob(struct acr_r352 *acr)
 	hdr = acr->hsbl_blob;
 	hsbl_desc = acr->hsbl_blob + hdr->header_offset;
 
-	/* virtual start address for boot vector */
-	acr->base.start_address = hsbl_desc->start_tag << 8;
-
 	return 0;
 }
 
@@ -813,8 +810,9 @@ acr_r352_load_blobs(struct acr_r352 *acr, struct nvkm_secboot *sb)
 }
 
 /**
- * acr_r352_load() - prepare HS falcon to run the specified blob, mapped
- * at GPU address offset.
+ * acr_r352_load() - prepare HS falcon to run the specified blob, mapped.
+ *
+ * Returns the start address to use, or a negative error value.
  */
 static int
 acr_r352_load(struct nvkm_acr *_acr, struct nvkm_secboot *sb,
@@ -861,7 +859,7 @@ acr_r352_load(struct nvkm_acr *_acr, struct nvkm_secboot *sb,
 	nvkm_falcon_load_dmem(falcon, bl_desc, hsbl_desc->dmem_load_off,
 			      bl_desc_size, 0);
 
-	return 0;
+	return hsbl_desc->start_tag << 8;
 }
 
 static int

drivers/gpu/drm/nouveau/nvkm/subdev/secboot/gm200.c

@@ -40,6 +40,7 @@ gm200_secboot_run_blob(struct nvkm_secboot *sb, struct nvkm_gpuobj *blob)
 	struct nvkm_subdev *subdev = &gsb->base.subdev;
 	struct nvkm_falcon *falcon = gsb->base.boot_falcon;
 	struct nvkm_vma vma;
+	u32 start_address;
 	int ret;
 
 	ret = nvkm_falcon_get(falcon, subdev);
@@ -61,9 +62,11 @@ gm200_secboot_run_blob(struct nvkm_secboot *sb, struct nvkm_gpuobj *blob)
 
 	/* Load the HS bootloader into the falcon's IMEM/DMEM */
 	ret = sb->acr->func->load(sb->acr, &gsb->base, blob, vma.offset);
-	if (ret)
+	if (ret < 0)
 		goto end;
 
+	start_address = ret;
+
 	/* Disable interrupts as we will poll for the HALT bit */
 	nvkm_mc_intr_mask(sb->subdev.device, falcon->owner->index, false);
 
@@ -71,7 +74,7 @@ gm200_secboot_run_blob(struct nvkm_secboot *sb, struct nvkm_gpuobj *blob)
 	nvkm_falcon_wr32(falcon, 0x040, 0xdeada5a5);
 
 	/* Start the HS bootloader */
-	nvkm_falcon_set_start_addr(falcon, sb->acr->start_address);
+	nvkm_falcon_set_start_addr(falcon, start_address);
 	nvkm_falcon_start(falcon);
 	ret = nvkm_falcon_wait_for_halt(falcon, 100);
 	if (ret)