libpayload/storage: Add NVMe driver

Tested with qemu virtual NVMe and Intel hardware. Works with FILO.

Change-Id: Ie75b1dc743dac3426c230c57ee23b771ba3a6e0c
Signed-off-by: Thomas Heijligen <thomas.heijligen@secunet.com>
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33582
Reviewed-by:  Felix Singer <felixsinger@posteo.net>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

payloads/libpayload/include/pci/pci.h

@@ -67,6 +67,7 @@
 #define PCI_ROM_ADDRESS_MASK	~0x7ff
 
 #define PCI_CLASS_STORAGE_AHCI	0x0106
+#define PCI_CLASS_STORAGE_NVME	0x0108
 #define PCI_CLASS_MEMORY_OTHER	0x0580
 
 #define PCI_VENDOR_ID_INTEL 0x8086

payloads/libpayload/include/storage/nvme.h

@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: BSD-3-Clause
+/*
+ * Libpayload NVMe device driver
+ * Copyright (C) 2019 secunet Security Networks AG
+ */
+
+#ifndef _STORAGE_NVME_H
+#define _STORAGE_NVME_H
+
+#include "storage.h"
+
+void nvme_initialize(struct pci_dev *dev);
+
+#endif /* _STORAGE_NVME_H */

payloads/libpayload/include/storage/storage.h

@@ -42,6 +42,7 @@ typedef enum {
 	PORT_TYPE_IDE	= (1 << 0),
 	PORT_TYPE_SATA	= (1 << 1),
 	PORT_TYPE_USB	= (1 << 2),
+	PORT_TYPE_NVME	= (1 << 3),
 } storage_port_t;
 
 typedef enum {