drm/nouveau/secboot: support running ACR on SEC

Add support for running the ACR binary on the SEC falcon.
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

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

@@ -30,7 +30,8 @@ enum nvkm_secboot_falcon {
 	NVKM_SECBOOT_FALCON_RESERVED = 1,
 	NVKM_SECBOOT_FALCON_FECS = 2,
 	NVKM_SECBOOT_FALCON_GPCCS = 3,
-	NVKM_SECBOOT_FALCON_END = 4,
+	NVKM_SECBOOT_FALCON_SEC2 = 7,
+	NVKM_SECBOOT_FALCON_END = 8,
 	NVKM_SECBOOT_FALCON_INVALID = 0xffffffff,
 };
 

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

@@ -28,6 +28,7 @@
 #include <subdev/mc.h>
 #include <subdev/pmu.h>
 #include <core/msgqueue.h>
+#include <engine/sec2.h>
 
 /**
  * struct hsf_fw_header - HS firmware descriptor
@@ -1017,7 +1018,7 @@ acr_r352_reset(struct nvkm_acr *_acr, struct nvkm_secboot *sb,
 	       enum nvkm_secboot_falcon falcon)
 {
 	struct acr_r352 *acr = acr_r352(_acr);
-	struct nvkm_pmu *pmu = sb->subdev.device->pmu;
+	struct nvkm_msgqueue *queue;
 	const char *fname = nvkm_secboot_falcon_name[falcon];
 	bool wpr_already_set = sb->wpr_set;
 	int ret;
@@ -1037,9 +1038,20 @@ acr_r352_reset(struct nvkm_acr *_acr, struct nvkm_secboot *sb,
 			return ret;
 	}
 
-	/* Otherwise just ask the PMU to reset the falcon */
+	switch (_acr->boot_falcon) {
+	case NVKM_SECBOOT_FALCON_PMU:
+		queue = sb->subdev.device->pmu->queue;
+		break;
+	case NVKM_SECBOOT_FALCON_SEC2:
+		queue = sb->subdev.device->sec2->queue;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	/* Otherwise just ask the LS firmware to reset the falcon */
 	nvkm_debug(&sb->subdev, "resetting %s falcon\n", fname);
-	ret = nvkm_msgqueue_acr_boot_falcon(pmu->queue, falcon);
+	ret = nvkm_msgqueue_acr_boot_falcon(queue, falcon);
 	if (ret) {
 		nvkm_error(&sb->subdev, "cannot boot %s falcon\n", fname);
 		return ret;

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

@@ -87,6 +87,7 @@
 #include <subdev/mc.h>
 #include <subdev/timer.h>
 #include <subdev/pmu.h>
+#include <engine/sec2.h>
 
 const char *
 nvkm_secboot_falcon_name[] = {
@@ -94,6 +95,7 @@ nvkm_secboot_falcon_name[] = {
 	[NVKM_SECBOOT_FALCON_RESERVED] = "<reserved>",
 	[NVKM_SECBOOT_FALCON_FECS] = "FECS",
 	[NVKM_SECBOOT_FALCON_GPCCS] = "GPCCS",
+	[NVKM_SECBOOT_FALCON_SEC2] = "SEC2",
 	[NVKM_SECBOOT_FALCON_END] = "<invalid>",
 };
 /**
@@ -133,11 +135,17 @@ nvkm_secboot_oneinit(struct nvkm_subdev *subdev)
 	case NVKM_SECBOOT_FALCON_PMU:
 		sb->boot_falcon = subdev->device->pmu->falcon;
 		break;
+	case NVKM_SECBOOT_FALCON_SEC2:
+		/* we must keep SEC2 alive forever since ACR will run on it */
+		nvkm_engine_ref(&subdev->device->sec2->engine);
+		sb->boot_falcon = subdev->device->sec2->falcon;
+		break;
 	default:
 		nvkm_error(subdev, "Unmanaged boot falcon %s!\n",
 			                nvkm_secboot_falcon_name[sb->acr->boot_falcon]);
 		return -EINVAL;
 	}
+	nvkm_debug(subdev, "using %s falcon for ACR\n", sb->boot_falcon->name);
 
 	/* Call chip-specific init function */
 	if (sb->func->oneinit)