Something went wrong. Try again.
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Something went wrong. Try again.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168/* SPDX-License-Identifier: GPL-2.0 *//* * Copyright (C) 2015-2019 Intel Corp. All rights reserved * Copyright (C) 2021-2022 Linaro Ltd */#ifndef __RPMB_H__#define __RPMB_H__
#include <linux/device.h>#include <linux/types.h>
/** * enum rpmb_type - type of underlying storage technology * * @RPMB_TYPE_EMMC : emmc (JESD84-B50.1) * @RPMB_TYPE_UFS : UFS (JESD220) * @RPMB_TYPE_NVME : NVM Express */enum rpmb_type { RPMB_TYPE_EMMC, RPMB_TYPE_UFS, RPMB_TYPE_NVME,};
/** * struct rpmb_descr - RPMB description provided by the underlying block device * * @type : block device type * @route_frames : routes frames to and from the RPMB device * @dev_id : unique device identifier read from the hardware * @dev_id_len : length of unique device identifier * @reliable_wr_count: number of sectors that can be written in one access * @capacity : capacity of the device in units of 128K * * @dev_id is intended to be used as input when deriving the authenticaion key. */struct rpmb_descr { enum rpmb_type type; int (*route_frames)(struct device *dev, u8 *req, unsigned int req_len, u8 *resp, unsigned int resp_len); u8 *dev_id; size_t dev_id_len; u16 reliable_wr_count; u16 capacity;};
/** * struct rpmb_dev - device which can support RPMB partition * * @dev : device * @id : device_id * @list_node : linked list node * @descr : RPMB description */struct rpmb_dev { struct device dev; int id; struct list_head list_node; struct rpmb_descr descr;};
#define to_rpmb_dev(x) container_of((x), struct rpmb_dev, dev)
/** * struct rpmb_frame - RPMB frame structure for authenticated access * * @stuff : stuff bytes, a padding/reserved area of 196 bytes at the * beginning of the RPMB frame. They don’t carry meaningful * data but are required to make the frame exactly 512 bytes. * @key_mac : The authentication key or the message authentication * code (MAC) depending on the request/response type. * The MAC will be delivered in the last (or the only) * block of data. * @data : Data to be written or read by signed access. * @nonce : Random number generated by the host for the requests * and copied to the response by the RPMB engine. * @write_counter: Counter value for the total amount of the successful * authenticated data write requests made by the host. * @addr : Address of the data to be programmed to or read * from the RPMB. Address is the serial number of * the accessed block (half sector 256B). * @block_count : Number of blocks (half sectors, 256B) requested to be * read/programmed. * @result : Includes information about the status of the write counter * (valid, expired) and result of the access made to the RPMB. * @req_resp : Defines the type of request and response to/from the memory. * * The stuff bytes and big-endian properties are modeled to fit to the spec. */struct rpmb_frame { u8 stuff[196]; u8 key_mac[32]; u8 data[256]; u8 nonce[16]; __be32 write_counter; __be16 addr; __be16 block_count; __be16 result; __be16 req_resp;};
#define RPMB_PROGRAM_KEY 0x1 /* Program RPMB Authentication Key */#define RPMB_GET_WRITE_COUNTER 0x2 /* Read RPMB write counter */#define RPMB_WRITE_DATA 0x3 /* Write data to RPMB partition */#define RPMB_READ_DATA 0x4 /* Read data from RPMB partition */#define RPMB_RESULT_READ 0x5 /* Read result request (Internal) */
#if IS_ENABLED(CONFIG_RPMB)struct rpmb_dev *rpmb_dev_get(struct rpmb_dev *rdev);void rpmb_dev_put(struct rpmb_dev *rdev);struct rpmb_dev *rpmb_dev_find_device(const void *data, const struct rpmb_dev *start, int (*match)(struct device *dev, const void *data));int rpmb_interface_register(struct class_interface *intf);void rpmb_interface_unregister(struct class_interface *intf);struct rpmb_dev *rpmb_dev_register(struct device *dev, struct rpmb_descr *descr);int rpmb_dev_unregister(struct rpmb_dev *rdev);
int rpmb_route_frames(struct rpmb_dev *rdev, u8 *req, unsigned int req_len, u8 *resp, unsigned int resp_len);
#elsestatic inline struct rpmb_dev *rpmb_dev_get(struct rpmb_dev *rdev){ return NULL;}
static inline void rpmb_dev_put(struct rpmb_dev *rdev) { }
static inline struct rpmb_dev *rpmb_dev_find_device(const void *data, const struct rpmb_dev *start, int (*match)(struct device *dev, const void *data)){ return NULL;}
static inline int rpmb_interface_register(struct class_interface *intf){ return -EOPNOTSUPP;}
static inline void rpmb_interface_unregister(struct class_interface *intf){}
static inline struct rpmb_dev *rpmb_dev_register(struct device *dev, struct rpmb_descr *descr){ return NULL;}
static inline int rpmb_dev_unregister(struct rpmb_dev *dev){ return 0;}
static inline int rpmb_route_frames(struct rpmb_dev *rdev, u8 *req, unsigned int req_len, u8 *resp, unsigned int resp_len){ return -EOPNOTSUPP;}#endif /* CONFIG_RPMB */
#endif /* __RPMB_H__ */