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MA-13831-3 [trusty] Add command to generate rng with CAAM 

Add new hwcrypto command to support rng generation with CAAM.

Test: rng generated on imx8qxp_mek.

Change-Id: I756f3e99423f0f9dfc2bcd30117a3f96e9f5f2f7
Signed-off-by: Ji Luo <ji.luo@nxp.com>
This commit is contained in:
Ji Luo 2018-12-20 15:33:26 +08:00
parent 78becc7f83
commit 4668e8a45e
3 changed files with 39 additions and 0 deletions
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9
include/interface/hwcrypto/hwcrypto.h
View File

@ -38,6 +38,7 @@ enum hwcrypto_command {
HWCRYPTO_HASH = (1 << HWCRYPTO_REQ_SHIFT),
HWCRYPTO_ENCAP_BLOB = (2 << HWCRYPTO_REQ_SHIFT),
HWCRYPTO_GEN_RNG = (3 << HWCRYPTO_REQ_SHIFT),
};
/**
@ -96,4 +97,12 @@ typedef struct hwcrypto_blob_msg {
uint32_t blob_pa;
}hwcrypto_blob_msg;
/**
* @buf: physical start address of the output rng buf.
* @len: size of required rng.
*/
typedef struct hwcrypto_rng_msg {
uint32_t buf;
uint32_t len;
}hwcrypto_rng_msg;
#endif /* TRUSTY_INTERFACE_HWCRYPTO_H_ */

8
include/trusty/hwcrypto.h
View File

@ -66,4 +66,12 @@ int hwcrypto_hash(uint32_t in_addr, uint32_t in_len, uint32_t out_addr,
*/
int hwcrypto_gen_blob(uint32_t plain_pa,
uint32_t plain_size, uint32_t blob_pa);
/* Send request to secure side to generate rng with caam.
* Returns one of trusty_err.
*
* @buf: physical start address of the output rng buf.
* @len: size of required rng.
* */
int hwcrypto_gen_rng(uint32_t buf, uint32_t len);
#endif /* TRUSTY_HWCRYPTO_H_ */

22
lib/trusty/ql-tipc/hwcrypto.c
View File

@ -218,3 +218,25 @@ int hwcrypto_gen_blob(uint32_t plain_pa,
sizeof(req), NULL, 0, false);
return rc;
}
int hwcrypto_gen_rng(uint32_t buf, uint32_t len)
{
hwcrypto_rng_msg req;
unsigned long start, end;
/* check the address */
if (buf == 0)
return TRUSTY_ERR_INVALID_ARGS;
/* fill the request buffer */
req.buf = buf;
req.len = len;
/* invalidate dcache for output buffer */
start = (unsigned long)buf & ~(ARCH_DMA_MINALIGN - 1);
end = ALIGN((unsigned long)buf + len, ARCH_DMA_MINALIGN);
invalidate_dcache_range(start, end);
int rc = hwcrypto_do_tipc(HWCRYPTO_GEN_RNG, (void*)&req,
sizeof(req), NULL, 0, false);
return rc;
}