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/* Qualcomm SMC Module API */
#ifndef __SMCMOD_H_
#define __SMCMOD_H_
#include <linux/types.h>
#include <linux/ioctl.h>
#define SMCMOD_DEV "smcmod"
#define SMCMOD_REG_REQ_MAX_ARGS 2
/**
* struct smcmod_reg_req - for SMC register ioctl request
*
* @service_id - requested service.
* @command_id - requested command.
* @num_args - number of arguments.
* @args - argument(s) to be passed to the secure world.
* @return_val - return value from secure world operation.
*/
struct smcmod_reg_req {
uint32_t service_id; /* in */
uint32_t command_id; /* in */
uint8_t num_args; /* in */
uint32_t args[SMCMOD_REG_REQ_MAX_ARGS]; /* in */
uint32_t return_val; /* out */
};
/**
* struct smcmod_buf_req - for SMC buffer ioctl request
*
* @service_id - requested service.
* @command_id - requested command.
* @ion_cmd_fd - fd obtained from ION_IOC_MAP or ION_IOC_SHARE.
* @cmd_len - length of command data buffer in bytes.
* @ion_resp_fd - fd obtained from ION_IOC_MAP or ION_IOC_SHARE.
* @resp_len - length of response data buffer in bytes.
* @return_val - return value from secure world operation.
*/
struct smcmod_buf_req {
uint32_t service_id;/* in */
uint32_t command_id; /* in */
int32_t ion_cmd_fd; /* in */
uint32_t cmd_len; /* in */
int32_t ion_resp_fd; /* in */
uint32_t resp_len; /* in */
uint32_t return_val; /* out */
};
/**
* struct smcmod_cipher_req - for SMC cipher command ioctl
*
* @algorithm - specifies the cipher algorithm.
* @operation - specifies encryption or decryption.
* @mode - specifies cipher mode.
* @ion_key_fd - fd obtained form ION_IOC_MAP or ION_IOC_SHARE.
* @key_size - key size in bytes.
* @ion_plain_text_fd - fd obtained form ION_IOC_MAP or ION_IOC_SHARE.
* @plain_text_size - size of plain text in bytes.
* @ion_cipher_text_fd - fd obtained form ION_IOC_MAP or ION_IOC_SHARE.
* @cipher_text_size - cipher text size in bytes.
* @ion_init_vector_fd - fd obtained form ION_IOC_MAP or ION_IOC_SHARE.
* @init_vector_size - size of initialization vector in bytes.
* @key_is_null - indicates that the key is null.
* @return_val - return value from secure world opreation.
*/
struct smcmod_cipher_req {
uint32_t algorithm; /* in */
uint32_t operation; /* in */
uint32_t mode; /* in */
int32_t ion_key_fd; /* in */
uint32_t key_size; /* in */
int32_t ion_plain_text_fd; /* in (encrypt)/out (decrypt) */
uint32_t plain_text_size; /* in */
int32_t ion_cipher_text_fd; /* out (encrypt)/in (decrypt) */
uint32_t cipher_text_size; /* in */
int32_t ion_init_vector_fd; /* in */
uint32_t init_vector_size; /* in */
uint32_t key_is_null; /* in */
uint32_t return_val; /* out */
};
/**
* struct smcmod_msg_digest_req - for message digest command ioctl
*
* @algorithm - specifies the cipher algorithm.
* @ion_key_fd - fd obtained form ION_IOC_MAP or ION_IOC_SHARE.
* @key_size - hash key size in bytes.
* @ion_input_fd - fd obtained form ION_IOC_MAP or ION_IOC_SHARE.
* @input_size - input data size in bytes.
* @ion_output_fd - fd obtained form ION_IOC_MAP or ION_IOC_SHARE.
* @output_size - size of output buffer in bytes.
* @fixed_block - indicates whether this is a fixed block digest.
* @key_is_null - indicates that the key is null.
* @return_val - return value from secure world opreation.
*/
struct smcmod_msg_digest_req {
uint32_t algorithm; /* in */
int32_t ion_key_fd; /* in */
uint32_t key_size; /* in */
int32_t ion_input_fd; /* in */
uint32_t input_size; /* in */
int32_t ion_output_fd; /* in/out */
uint32_t output_size; /* in */
uint32_t fixed_block; /* in */
uint32_t key_is_null; /* in */
uint32_t return_val; /* out */
} __packed;
/**
* struct smcmod_decrypt_req - used to decrypt image fragments.
* @service_id - requested service.
* @command_id - requested command.
* @operation - specifies metadata parsing or image fragment decrypting.
* @request - describes request parameters depending on operation.
* @response - this is the response of the request.
*/
struct smcmod_decrypt_req {
uint32_t service_id;
uint32_t command_id;
#define SMCMOD_DECRYPT_REQ_OP_METADATA 1
#define SMCMOD_DECRYPT_REQ_OP_IMG_FRAG 2
uint32_t operation;
union {
struct {
uint32_t len;
uint32_t ion_fd;
} metadata;
struct {
uint32_t ctx_id;
uint32_t last_frag;
uint32_t frag_len;
uint32_t ion_fd;
uint32_t offset;
} img_frag;
} request;
union {
struct {
uint32_t status;
uint32_t ctx_id;
uint32_t end_offset;
} metadata;
struct {
uint32_t status;
} img_frag;
} response;
};
#define SMCMOD_IOC_MAGIC 0x97
/* Number chosen to avoid any conflicts */
#define SMCMOD_IOCTL_SEND_REG_CMD \
_IOWR(SMCMOD_IOC_MAGIC, 32, struct smcmod_reg_req)
#define SMCMOD_IOCTL_SEND_BUF_CMD \
_IOWR(SMCMOD_IOC_MAGIC, 33, struct smcmod_buf_req)
#define SMCMOD_IOCTL_SEND_CIPHER_CMD \
_IOWR(SMCMOD_IOC_MAGIC, 34, struct smcmod_cipher_req)
#define SMCMOD_IOCTL_SEND_MSG_DIGEST_CMD \
_IOWR(SMCMOD_IOC_MAGIC, 35, struct smcmod_msg_digest_req)
#define SMCMOD_IOCTL_GET_VERSION _IOWR(SMCMOD_IOC_MAGIC, 36, uint32_t)
#define SMCMOD_IOCTL_SEND_DECRYPT_CMD \
_IOWR(SMCMOD_IOC_MAGIC, 37, struct smcmod_decrypt_req)
#endif /* __SMCMOD_H_ */
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