mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-21 09:15:42 +07:00
49d22167f8
The param2 member in atmel_i2c_cmd is supposed to be little-endian
but was marked as u16. This patch changes it to a __le16 which
reveals a missing endian swap in atmel_i2c_init_read_cmd.
Another missing little-endian marking is also added in
atmel_i2c_checksum.
Fixes: 11105693fa ("crypto: atmel-ecc - introduce Microchip...")
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
198 lines
6.1 KiB
C
198 lines
6.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Copyright (c) 2017, Microchip Technology Inc.
|
|
* Author: Tudor Ambarus <tudor.ambarus@microchip.com>
|
|
*/
|
|
|
|
#ifndef __ATMEL_I2C_H__
|
|
#define __ATMEL_I2C_H__
|
|
|
|
#include <linux/hw_random.h>
|
|
#include <linux/types.h>
|
|
|
|
#define ATMEL_ECC_PRIORITY 300
|
|
|
|
#define COMMAND 0x03 /* packet function */
|
|
#define SLEEP_TOKEN 0x01
|
|
#define WAKE_TOKEN_MAX_SIZE 8
|
|
|
|
/* Definitions of Data and Command sizes */
|
|
#define WORD_ADDR_SIZE 1
|
|
#define COUNT_SIZE 1
|
|
#define CRC_SIZE 2
|
|
#define CMD_OVERHEAD_SIZE (COUNT_SIZE + CRC_SIZE)
|
|
|
|
/* size in bytes of the n prime */
|
|
#define ATMEL_ECC_NIST_P256_N_SIZE 32
|
|
#define ATMEL_ECC_PUBKEY_SIZE (2 * ATMEL_ECC_NIST_P256_N_SIZE)
|
|
|
|
#define STATUS_RSP_SIZE 4
|
|
#define ECDH_RSP_SIZE (32 + CMD_OVERHEAD_SIZE)
|
|
#define GENKEY_RSP_SIZE (ATMEL_ECC_PUBKEY_SIZE + \
|
|
CMD_OVERHEAD_SIZE)
|
|
#define READ_RSP_SIZE (4 + CMD_OVERHEAD_SIZE)
|
|
#define RANDOM_RSP_SIZE (32 + CMD_OVERHEAD_SIZE)
|
|
#define MAX_RSP_SIZE GENKEY_RSP_SIZE
|
|
|
|
/**
|
|
* atmel_i2c_cmd - structure used for communicating with the device.
|
|
* @word_addr: indicates the function of the packet sent to the device. This
|
|
* byte should have a value of COMMAND for normal operation.
|
|
* @count : number of bytes to be transferred to (or from) the device.
|
|
* @opcode : the command code.
|
|
* @param1 : the first parameter; always present.
|
|
* @param2 : the second parameter; always present.
|
|
* @data : optional remaining input data. Includes a 2-byte CRC.
|
|
* @rxsize : size of the data received from i2c client.
|
|
* @msecs : command execution time in milliseconds
|
|
*/
|
|
struct atmel_i2c_cmd {
|
|
u8 word_addr;
|
|
u8 count;
|
|
u8 opcode;
|
|
u8 param1;
|
|
__le16 param2;
|
|
u8 data[MAX_RSP_SIZE];
|
|
u8 msecs;
|
|
u16 rxsize;
|
|
} __packed;
|
|
|
|
/* Status/Error codes */
|
|
#define STATUS_SIZE 0x04
|
|
#define STATUS_NOERR 0x00
|
|
#define STATUS_WAKE_SUCCESSFUL 0x11
|
|
|
|
static const struct {
|
|
u8 value;
|
|
const char *error_text;
|
|
} error_list[] = {
|
|
{ 0x01, "CheckMac or Verify miscompare" },
|
|
{ 0x03, "Parse Error" },
|
|
{ 0x05, "ECC Fault" },
|
|
{ 0x0F, "Execution Error" },
|
|
{ 0xEE, "Watchdog about to expire" },
|
|
{ 0xFF, "CRC or other communication error" },
|
|
};
|
|
|
|
/* Definitions for eeprom organization */
|
|
#define CONFIG_ZONE 0
|
|
|
|
/* Definitions for Indexes common to all commands */
|
|
#define RSP_DATA_IDX 1 /* buffer index of data in response */
|
|
#define DATA_SLOT_2 2 /* used for ECDH private key */
|
|
|
|
/* Definitions for the device lock state */
|
|
#define DEVICE_LOCK_ADDR 0x15
|
|
#define LOCK_VALUE_IDX (RSP_DATA_IDX + 2)
|
|
#define LOCK_CONFIG_IDX (RSP_DATA_IDX + 3)
|
|
|
|
/*
|
|
* Wake High delay to data communication (microseconds). SDA should be stable
|
|
* high for this entire duration.
|
|
*/
|
|
#define TWHI_MIN 1500
|
|
#define TWHI_MAX 1550
|
|
|
|
/* Wake Low duration */
|
|
#define TWLO_USEC 60
|
|
|
|
/* Command execution time (milliseconds) */
|
|
#define MAX_EXEC_TIME_ECDH 58
|
|
#define MAX_EXEC_TIME_GENKEY 115
|
|
#define MAX_EXEC_TIME_READ 1
|
|
#define MAX_EXEC_TIME_RANDOM 50
|
|
|
|
/* Command opcode */
|
|
#define OPCODE_ECDH 0x43
|
|
#define OPCODE_GENKEY 0x40
|
|
#define OPCODE_READ 0x02
|
|
#define OPCODE_RANDOM 0x1b
|
|
|
|
/* Definitions for the READ Command */
|
|
#define READ_COUNT 7
|
|
|
|
/* Definitions for the RANDOM Command */
|
|
#define RANDOM_COUNT 7
|
|
|
|
/* Definitions for the GenKey Command */
|
|
#define GENKEY_COUNT 7
|
|
#define GENKEY_MODE_PRIVATE 0x04
|
|
|
|
/* Definitions for the ECDH Command */
|
|
#define ECDH_COUNT 71
|
|
#define ECDH_PREFIX_MODE 0x00
|
|
|
|
/* Used for binding tfm objects to i2c clients. */
|
|
struct atmel_ecc_driver_data {
|
|
struct list_head i2c_client_list;
|
|
spinlock_t i2c_list_lock;
|
|
} ____cacheline_aligned;
|
|
|
|
/**
|
|
* atmel_i2c_client_priv - i2c_client private data
|
|
* @client : pointer to i2c client device
|
|
* @i2c_client_list_node: part of i2c_client_list
|
|
* @lock : lock for sending i2c commands
|
|
* @wake_token : wake token array of zeros
|
|
* @wake_token_sz : size in bytes of the wake_token
|
|
* @tfm_count : number of active crypto transformations on i2c client
|
|
*
|
|
* Reads and writes from/to the i2c client are sequential. The first byte
|
|
* transmitted to the device is treated as the byte size. Any attempt to send
|
|
* more than this number of bytes will cause the device to not ACK those bytes.
|
|
* After the host writes a single command byte to the input buffer, reads are
|
|
* prohibited until after the device completes command execution. Use a mutex
|
|
* when sending i2c commands.
|
|
*/
|
|
struct atmel_i2c_client_priv {
|
|
struct i2c_client *client;
|
|
struct list_head i2c_client_list_node;
|
|
struct mutex lock;
|
|
u8 wake_token[WAKE_TOKEN_MAX_SIZE];
|
|
size_t wake_token_sz;
|
|
atomic_t tfm_count ____cacheline_aligned;
|
|
struct hwrng hwrng;
|
|
};
|
|
|
|
/**
|
|
* atmel_i2c_work_data - data structure representing the work
|
|
* @ctx : transformation context.
|
|
* @cbk : pointer to a callback function to be invoked upon completion of this
|
|
* request. This has the form:
|
|
* callback(struct atmel_i2c_work_data *work_data, void *areq, u8 status)
|
|
* where:
|
|
* @work_data: data structure representing the work
|
|
* @areq : optional pointer to an argument passed with the original
|
|
* request.
|
|
* @status : status returned from the i2c client device or i2c error.
|
|
* @areq: optional pointer to a user argument for use at callback time.
|
|
* @work: describes the task to be executed.
|
|
* @cmd : structure used for communicating with the device.
|
|
*/
|
|
struct atmel_i2c_work_data {
|
|
void *ctx;
|
|
struct i2c_client *client;
|
|
void (*cbk)(struct atmel_i2c_work_data *work_data, void *areq,
|
|
int status);
|
|
void *areq;
|
|
struct work_struct work;
|
|
struct atmel_i2c_cmd cmd;
|
|
};
|
|
|
|
int atmel_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id);
|
|
|
|
void atmel_i2c_enqueue(struct atmel_i2c_work_data *work_data,
|
|
void (*cbk)(struct atmel_i2c_work_data *work_data,
|
|
void *areq, int status),
|
|
void *areq);
|
|
|
|
int atmel_i2c_send_receive(struct i2c_client *client, struct atmel_i2c_cmd *cmd);
|
|
|
|
void atmel_i2c_init_read_cmd(struct atmel_i2c_cmd *cmd);
|
|
void atmel_i2c_init_random_cmd(struct atmel_i2c_cmd *cmd);
|
|
void atmel_i2c_init_genkey_cmd(struct atmel_i2c_cmd *cmd, u16 keyid);
|
|
int atmel_i2c_init_ecdh_cmd(struct atmel_i2c_cmd *cmd,
|
|
struct scatterlist *pubkey);
|
|
|
|
#endif /* __ATMEL_I2C_H__ */
|