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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Implements utilities for firmware management of mobile chipsets.
*
* Copyright (C) 2021 Google, Inc.
*/
#ifndef __MOBILE_FIRMWARE_H__
#define __MOBILE_FIRMWARE_H__
#include <linux/sizes.h>
#include "edgetpu-internal.h"
#include "edgetpu.h"
#define MAX_IOMMU_MAPPINGS 23
#define MAX_NS_IOMMU_MAPPINGS 5
#define FW_PRIV_LEVEL_GSA (0)
#define FW_PRIV_LEVEL_TZ (1)
#define FW_PRIV_LEVEL_NS (2)
/* mobile FW header size */
#define MOBILE_FW_HEADER_SIZE SZ_4K
/* The offset to the signed firmware header. */
#define MOBILE_HEADER_OFFSET 0x400
/* The offset to image configuration. */
#define MOBILE_IMAGE_CONFIG_OFFSET (MOBILE_HEADER_OFFSET + 0x160)
#define CONFIG_TO_SIZE(a) ((1 << ((a) & 0xFFF)) << 12)
#define CONFIG_TO_MBSIZE(a) (((a) & 0xFFF) << 20)
struct iommu_mapping {
/* TPU virt address */
__u32 virt_address;
/*
* contains a 12-bit aligned address and a page-order size into a
* 32-bit value i.e. a physical address and size in page order.
*/
__u32 image_config_value;
};
/*
* The image configuration attached to the signed firmware.
*/
struct mobile_image_config {
__u32 carveout_base;
__u32 firmware_base;
__u32 firmware_size;
struct edgetpu_fw_version firmware_versions;
__u32 config_version;
__u32 privilege_level;
__u32 remapped_region_start;
__u32 remapped_region_end;
__u32 num_iommu_mapping;
struct iommu_mapping mappings[MAX_IOMMU_MAPPINGS];
__u32 num_ns_iommu_mappings;
__u32 ns_iommu_mappings[MAX_NS_IOMMU_MAPPINGS];
} __packed;
/*
* Mobile firmware header.
*/
struct mobile_image_header {
char sig[512];
char pub[512];
int Magic;
int Generation;
int RollbackInfo;
int Length;
char Flags[16];
char BodyHash[32];
char ChipId[32];
char AuthConfig[256];
struct mobile_image_config ImageConfig;
};
/* Value of Magic field above: 'TPUF' as a 32-bit LE int */
#define EDGETPU_MOBILE_FW_MAGIC 0x46555054
int edgetpu_mobile_firmware_create(struct edgetpu_dev *etdev);
void edgetpu_mobile_firmware_destroy(struct edgetpu_dev *etdev);
/*
* Assert or release the reset signal of the TPU's CPU
* Depending on privilege level, this may be by a direct register write
* or a call into GSA.
*/
int edgetpu_mobile_firmware_reset_cpu(struct edgetpu_dev *etdev, bool assert_reset);
#endif /* __MOBILE_FIRMWARE_H__ */
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