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authorHarsha <harsha.harsha@xilinx.com>2022-02-23 13:35:02 +0300
committerHerbert Xu <herbert@gondor.apana.org.au>2022-03-03 01:49:21 +0300
commit80f940ef527efdd8e36c69f7b5ee8e07ac8891d9 (patch)
tree362b24d34402c094f3664966d8a13e80dc9f09b6 /drivers
parent52af29abffca9f091bb6e8f615d693b5380cbe7a (diff)
downloadlinux-80f940ef527efdd8e36c69f7b5ee8e07ac8891d9.tar.xz
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 <harsha.harsha@xilinx.com> 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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/firmware/xilinx/zynqmp.c26
1 files changed, 26 insertions, 0 deletions
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
@@ -1121,6 +1121,32 @@ 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
* event/error.