habanalabs: add basic Goya h/w initialization

This patch adds the basic part of Goya's H/W initialization. It adds code
that initializes Goya's internal CPU, various registers that are related to
internal routing, scrambling, workarounds for H/W bugs, etc.

It also initializes Goya's security scheme that prevents the user from
abusing Goya to steal data from the host, crash the host, change
Goya's F/W, etc.

Reviewed-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/habanalabs/device.c

@@ -319,6 +319,15 @@ int hl_device_init(struct hl_device *hdev, struct class *hclass)
 		goto release_ctx;
 	}
 
+	rc = hdev->asic_funcs->hw_init(hdev);
+	if (rc) {
+		dev_err(hdev->dev, "failed to initialize the H/W\n");
+		rc = 0;
+		goto out_disabled;
+	}
+
+	hdev->disabled = false;
+
 	dev_notice(hdev->dev,
 		"Successfully added device to habanalabs driver\n");
 
@@ -370,6 +379,9 @@ void hl_device_fini(struct hl_device *hdev)
 	if ((hdev->kernel_ctx) && (hl_ctx_put(hdev->kernel_ctx) != 1))
 		dev_err(hdev->dev, "kernel ctx is still alive\n");
 
+	/* Reset the H/W. It will be in idle state after this returns */
+	hdev->asic_funcs->hw_fini(hdev, true);
+
 	/* Call ASIC S/W finalize function */
 	hdev->asic_funcs->sw_fini(hdev);
 

drivers/misc/habanalabs/goya/Makefile

@@ -1,3 +1,3 @@
 subdir-ccflags-y += -I$(src)
 
-HL_GOYA_FILES :=  goya/goya.o
+HL_GOYA_FILES :=  goya/goya.o goya/goya_security.o