xilinx: zynqmp: Extract aes operation into new file
This moves the aes operation that is performed by the pmu into a
separate file. This way it can be called not just from the shell
command, but also e.g. from board initialization code.
Signed-off-by: Christian Taedcke <christian.taedcke@weidmueller.com>
Link: https://lore.kernel.org/r/20230725072658.16341-1-christian.taedcke-oss@weidmueller.com
Signed-off-by: Michal Simek <michal.simek@amd.com>
diff --git a/arch/arm/mach-zynqmp/Makefile b/arch/arm/mach-zynqmp/Makefile
index 3f25554..8f897a3 100644
--- a/arch/arm/mach-zynqmp/Makefile
+++ b/arch/arm/mach-zynqmp/Makefile
@@ -3,8 +3,7 @@
# (C) Copyright 2014 - 2015 Xilinx, Inc.
# Michal Simek <michal.simek@amd.com>
-obj-y += clk.o
-obj-y += cpu.o
+obj-y += aes.o clk.o cpu.o
obj-$(CONFIG_MP) += mp.o
obj-$(CONFIG_SPL_BUILD) += spl.o handoff.o psu_spl_init.o
obj-$(CONFIG_SPL_ZYNQMP_DRAM_ECC_INIT) += ecc_spl_init.o
diff --git a/arch/arm/mach-zynqmp/aes.c b/arch/arm/mach-zynqmp/aes.c
new file mode 100644
index 0000000..8a2b7fd
--- /dev/null
+++ b/arch/arm/mach-zynqmp/aes.c
@@ -0,0 +1,59 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) Copyright 2018 Xilinx, Inc.
+ * Siva Durga Prasad Paladugu <siva.durga.paladugu@xilinx.com>
+ *
+ * Copyright (C) 2023 Weidmueller Interface GmbH & Co. KG <oss@weidmueller.com>
+ * Christian Taedcke <christian.taedcke@weidmueller.com>
+ */
+
+#include <common.h>
+#include <mach/zynqmp_aes.h>
+
+#include <asm/arch/sys_proto.h>
+#include <cpu_func.h>
+#include <memalign.h>
+#include <zynqmp_firmware.h>
+
+int zynqmp_aes_operation(struct zynqmp_aes *aes)
+{
+ u32 ret_payload[PAYLOAD_ARG_CNT];
+ int ret;
+
+ if (zynqmp_firmware_version() <= PMUFW_V1_0)
+ return -ENOENT;
+
+ if (aes->srcaddr && aes->ivaddr && aes->dstaddr) {
+ flush_dcache_range(aes->srcaddr,
+ aes->srcaddr +
+ roundup(aes->len, ARCH_DMA_MINALIGN));
+ flush_dcache_range(aes->ivaddr,
+ aes->ivaddr +
+ roundup(IV_SIZE, ARCH_DMA_MINALIGN));
+ flush_dcache_range(aes->dstaddr,
+ aes->dstaddr +
+ roundup(aes->len, ARCH_DMA_MINALIGN));
+ }
+
+ if (aes->keysrc == 0) {
+ if (aes->keyaddr == 0)
+ return -EINVAL;
+
+ flush_dcache_range(aes->keyaddr,
+ aes->keyaddr +
+ roundup(KEY_PTR_LEN, ARCH_DMA_MINALIGN));
+ }
+
+ flush_dcache_range((ulong)aes, (ulong)(aes) +
+ roundup(sizeof(struct zynqmp_aes), ARCH_DMA_MINALIGN));
+
+ ret = xilinx_pm_request(PM_SECURE_AES, upper_32_bits((ulong)aes),
+ lower_32_bits((ulong)aes), 0, 0, ret_payload);
+ if (ret || ret_payload[1]) {
+ printf("Failed: AES op status:0x%x, errcode:0x%x\n",
+ ret, ret_payload[1]);
+ return -EIO;
+ }
+
+ return 0;
+}
diff --git a/arch/arm/mach-zynqmp/include/mach/zynqmp_aes.h b/arch/arm/mach-zynqmp/include/mach/zynqmp_aes.h
new file mode 100644
index 0000000..2a9cffb
--- /dev/null
+++ b/arch/arm/mach-zynqmp/include/mach/zynqmp_aes.h
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2023 Weidmueller Interface GmbH & Co. KG <oss@weidmueller.com>
+ * Christian Taedcke <christian.taedcke@weidmueller.com>
+ *
+ * Declaration of AES operation functionality for ZynqMP.
+ */
+
+#ifndef ZYNQMP_AES_H
+#define ZYNQMP_AES_H
+
+struct zynqmp_aes {
+ u64 srcaddr;
+ u64 ivaddr;
+ u64 keyaddr;
+ u64 dstaddr;
+ u64 len;
+ u64 op;
+ u64 keysrc;
+};
+
+/**
+ * zynqmp_aes_operation() - Performs an aes operation using the pmu firmware
+ *
+ * @aes: The aes operation buffer that must have been allocated using
+ * ALLOC_CACHE_ALIGN_BUFFER(struct zynqmp_aes, aes, 1)
+ *
+ * Return: 0 in case of success, in case of an error any other value
+ */
+int zynqmp_aes_operation(struct zynqmp_aes *aes);
+
+#endif /* ZYNQMP_AES_H */