From 80f940ef527efdd8e36c69f7b5ee8e07ac8891d9 Mon Sep 17 00:00:00 2001 From: Harsha Date: Wed, 23 Feb 2022 16:05:02 +0530 Subject: firmware: xilinx: Add ZynqMP SHA API for SHA3 functionality This patch adds zynqmp_pm_sha_hash API in the ZynqMP firmware to compute SHA3 hash of given data. Signed-off-by: Harsha Signed-off-by: Kalyani Akula Acked-by: Michal Simek Signed-off-by: Herbert Xu --- drivers/firmware/xilinx/zynqmp.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) (limited to 'drivers/firmware') diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c index 450c5f6a1cbf..5e5b0bb2e4e0 100644 --- a/drivers/firmware/xilinx/zynqmp.c +++ b/drivers/firmware/xilinx/zynqmp.c @@ -1120,6 +1120,32 @@ int zynqmp_pm_aes_engine(const u64 address, u32 *out) } EXPORT_SYMBOL_GPL(zynqmp_pm_aes_engine); +/** + * zynqmp_pm_sha_hash - Access the SHA engine to calculate the hash + * @address: Address of the data/ Address of output buffer where + * hash should be stored. + * @size: Size of the data. + * @flags: + * BIT(0) - for initializing csudma driver and SHA3(Here address + * and size inputs can be NULL). + * BIT(1) - to call Sha3_Update API which can be called multiple + * times when data is not contiguous. + * BIT(2) - to get final hash of the whole updated data. + * Hash will be overwritten at provided address with + * 48 bytes. + * + * Return: Returns status, either success or error code. + */ +int zynqmp_pm_sha_hash(const u64 address, const u32 size, const u32 flags) +{ + u32 lower_addr = lower_32_bits(address); + u32 upper_addr = upper_32_bits(address); + + return zynqmp_pm_invoke_fn(PM_SECURE_SHA, upper_addr, lower_addr, + size, flags, NULL); +} +EXPORT_SYMBOL_GPL(zynqmp_pm_sha_hash); + /** * zynqmp_pm_register_notifier() - PM API for register a subsystem * to be notified about specific -- cgit v1.2.3-58-ga151