feat(intel): support extended random number generation
The random number generation (RNG) mailbox command format
is updated to extends the support to upto 4080 bytes random
number generation. The new RNG format requires an opened
crypto service session.
A separated SMC function ID is introduced for the new RNG
format and it is only supported by Agilex.
Signed-off-by: Siew Chin Lim <elly.siew.chin.lim@intel.com>
Signed-off-by: Boon Khai Ng <boon.khai.ng@intel.com>
Signed-off-by: Sieu Mun Tang <sieu.mun.tang@intel.com>
Change-Id: I3f044a3c01ff7cb50be4705e2c1f982bf6f61432
diff --git a/plat/intel/soc/common/sip/socfpga_sip_fcs.c b/plat/intel/soc/common/sip/socfpga_sip_fcs.c
index 821beff..7b3069b 100644
--- a/plat/intel/soc/common/sip/socfpga_sip_fcs.c
+++ b/plat/intel/soc/common/sip/socfpga_sip_fcs.c
@@ -57,6 +57,45 @@
return INTEL_SIP_SMC_STATUS_OK;
}
+int intel_fcs_random_number_gen_ext(uint32_t session_id, uint32_t context_id,
+ uint32_t size, uint32_t *send_id)
+{
+ int status;
+ uint32_t payload_size;
+ uint32_t crypto_header;
+
+ if (size > (FCS_RANDOM_EXT_MAX_WORD_SIZE *
+ MBOX_WORD_BYTE) || size == 0U) {
+ return INTEL_SIP_SMC_STATUS_REJECTED;
+ }
+
+ if (!is_size_4_bytes_aligned(size)) {
+ return INTEL_SIP_SMC_STATUS_REJECTED;
+ }
+
+ crypto_header = (FCS_CS_FIELD_FLAG_INIT | FCS_CS_FIELD_FLAG_FINALIZE) <<
+ FCS_CS_FIELD_FLAG_OFFSET;
+
+ fcs_rng_payload payload = {
+ session_id,
+ context_id,
+ crypto_header,
+ size
+ };
+
+ payload_size = sizeof(payload) / MBOX_WORD_BYTE;
+
+ status = mailbox_send_cmd_async(send_id, MBOX_FCS_RANDOM_GEN,
+ (uint32_t *) &payload, payload_size,
+ CMD_INDIRECT);
+
+ if (status < 0) {
+ return INTEL_SIP_SMC_STATUS_ERROR;
+ }
+
+ return INTEL_SIP_SMC_STATUS_OK;
+}
+
uint32_t intel_fcs_send_cert(uint64_t addr, uint64_t size,
uint32_t *send_id)
{