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firmware: xilinx: Add ZynqMP aes API for AES functionality

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Add ZynqMP firmware AES API to perform encryption/decryption of given data.

Signed-off-by: Kalyani Akula <kalyani.akula@xilinx.com>
Acked-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Kalyani Akula 2020-02-17 15:56:41 +05:30 committed by Herbert Xu
parent ff462ddfd9
commit 057a0fb649
2 changed files with 27 additions and 0 deletions
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25
drivers/firmware/xilinx/zynqmp.c
View file

@ -707,6 +707,30 @@ static int zynqmp_pm_set_requirement(const u32 node, const u32 capabilities,
qos, ack, NULL);
}
/**
* zynqmp_pm_aes - Access AES hardware to encrypt/decrypt the data using
* AES-GCM core.
* @address: Address of the AesParams structure.
* @out: Returned output value
*
* Return: Returns status, either success or error code.
*/
static int zynqmp_pm_aes_engine(const u64 address, u32 *out)
{
u32 ret_payload[PAYLOAD_ARG_CNT];
int ret;
if (!out)
return -EINVAL;
ret = zynqmp_pm_invoke_fn(PM_SECURE_AES, upper_32_bits(address),
lower_32_bits(address),
0, 0, ret_payload);
*out = ret_payload[1];
return ret;
}
static const struct zynqmp_eemi_ops eemi_ops = {
.get_api_version = zynqmp_pm_get_api_version,
.get_chipid = zynqmp_pm_get_chipid,
@ -730,6 +754,7 @@ static const struct zynqmp_eemi_ops eemi_ops = {
.set_requirement = zynqmp_pm_set_requirement,
.fpga_load = zynqmp_pm_fpga_load,
.fpga_get_status = zynqmp_pm_fpga_get_status,
.aes = zynqmp_pm_aes_engine,
};
/**

2
include/linux/firmware/xlnx-zynqmp.h
View file

@ -82,6 +82,7 @@ enum pm_api_id {
PM_CLOCK_GETRATE,
PM_CLOCK_SETPARENT,
PM_CLOCK_GETPARENT,
PM_SECURE_AES = 47,
PM_FEATURE_CHECK = 63,
PM_API_MAX,
};
@ -315,6 +316,7 @@ struct zynqmp_eemi_ops {
const u32 capabilities,
const u32 qos,
const enum zynqmp_pm_request_ack ack);
int (*aes)(const u64 address, u32 *out);
};
int zynqmp_pm_invoke_fn(u32 pm_api_id, u32 arg0, u32 arg1,