SPDX: Convert all of our single license tags to Linux Kernel style

[platform/kernel/u-boot.git] / drivers / crypto / fsl / fsl_blob.c

diff --git a/drivers/crypto/fsl/fsl_blob.c b/drivers/crypto/fsl/fsl_blob.c
index 8b25921..ce6aa05 100644 (file)
--- a/drivers/crypto/fsl/fsl_blob.c
+++ b/drivers/crypto/fsl/fsl_blob.c
@@ -1,62 +1,143 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright 2014 Freescale Semiconductor, Inc.
  *
- * SPDX-License-Identifier:    GPL-2.0+
- *
  */
 
 #include <common.h>
 #include <malloc.h>
+#include <memalign.h>
 #include <fsl_sec.h>
-#include <asm-generic/errno.h>
+#include <linux/errno.h>
 #include "jobdesc.h"
 #include "desc.h"
 #include "jr.h"
 
+/**
+ * blob_decap() - Decapsulate the data from a blob
+ * @key_mod:    - Key modifier address
+ * @src:        - Source address (blob)
+ * @dst:        - Destination address (data)
+ * @len:        - Size of decapsulated data
+ *
+ * Note: Start and end of the key_mod, src and dst buffers have to be aligned to
+ * the cache line size (ARCH_DMA_MINALIGN) for the CAAM operation to succeed.
+ *
+ * Returns zero on success, negative on error.
+ */
 int blob_decap(u8 *key_mod, u8 *src, u8 *dst, u32 len)
 {
-       int ret, i = 0;
+       int ret, size, i = 0;
        u32 *desc;
 
-       printf("\nDecapsulating data to form blob\n");
-       desc = malloc(sizeof(int) * MAX_CAAM_DESCSIZE);
+       if (!IS_ALIGNED((uintptr_t)key_mod, ARCH_DMA_MINALIGN) ||
+           !IS_ALIGNED((uintptr_t)src, ARCH_DMA_MINALIGN) ||
+           !IS_ALIGNED((uintptr_t)dst, ARCH_DMA_MINALIGN)) {
+               puts("Error: blob_decap: Address arguments are not aligned!\n");
+               return -EINVAL;
+       }
+
+       printf("\nDecapsulating blob to get data\n");
+       desc = malloc_cache_aligned(sizeof(int) * MAX_CAAM_DESCSIZE);
        if (!desc) {
                debug("Not enough memory for descriptor allocation\n");
-               return -1;
+               return -ENOMEM;
        }
 
+       size = ALIGN(16, ARCH_DMA_MINALIGN);
+       flush_dcache_range((unsigned long)key_mod,
+                          (unsigned long)key_mod + size);
+
+       size = ALIGN(BLOB_SIZE(len), ARCH_DMA_MINALIGN);
+       flush_dcache_range((unsigned long)src,
+                          (unsigned long)src + size);
+
        inline_cnstr_jobdesc_blob_decap(desc, key_mod, src, dst, len);
 
+       debug("Descriptor dump:\n");
        for (i = 0; i < 14; i++)
-               printf("%x\n", *(desc + i));
+               debug("Word[%d]: %08x\n", i, *(desc + i));
+
+       size = ALIGN(sizeof(int) * MAX_CAAM_DESCSIZE, ARCH_DMA_MINALIGN);
+       flush_dcache_range((unsigned long)desc,
+                          (unsigned long)desc + size);
+
        ret = run_descriptor_jr(desc);
 
-       if (ret)
-               printf("Error in Decapsulation %d\n", ret);
+       if (ret) {
+               printf("Error in blob decapsulation: %d\n", ret);
+       } else {
+               size = ALIGN(len, ARCH_DMA_MINALIGN);
+               invalidate_dcache_range((unsigned long)dst,
+                                       (unsigned long)dst + size);
+
+               puts("Blob decapsulation successful.\n");
+       }
 
        free(desc);
        return ret;
 }
 
+/**
+ * blob_encap() - Encapsulate the data as a blob
+ * @key_mod:    - Key modifier address
+ * @src:        - Source address (data)
+ * @dst:        - Destination address (blob)
+ * @len:        - Size of data to be encapsulated
+ *
+ * Note: Start and end of the key_mod, src and dst buffers have to be aligned to
+ * the cache line size (ARCH_DMA_MINALIGN) for the CAAM operation to succeed.
+ *
+ * Returns zero on success, negative on error.
+ */
 int blob_encap(u8 *key_mod, u8 *src, u8 *dst, u32 len)
 {
-       int ret, i = 0;
+       int ret, size, i = 0;
        u32 *desc;
 
+       if (!IS_ALIGNED((uintptr_t)key_mod, ARCH_DMA_MINALIGN) ||
+           !IS_ALIGNED((uintptr_t)src, ARCH_DMA_MINALIGN) ||
+           !IS_ALIGNED((uintptr_t)dst, ARCH_DMA_MINALIGN)) {
+               puts("Error: blob_encap: Address arguments are not aligned!\n");
+               return -EINVAL;
+       }
+
        printf("\nEncapsulating data to form blob\n");
-       desc = malloc(sizeof(int) * MAX_CAAM_DESCSIZE);
+       desc = malloc_cache_aligned(sizeof(int) * MAX_CAAM_DESCSIZE);
        if (!desc) {
                debug("Not enough memory for descriptor allocation\n");
-               return -1;
+               return -ENOMEM;
        }
 
+       size = ALIGN(16, ARCH_DMA_MINALIGN);
+       flush_dcache_range((unsigned long)key_mod,
+                          (unsigned long)key_mod + size);
+
+       size = ALIGN(len, ARCH_DMA_MINALIGN);
+       flush_dcache_range((unsigned long)src,
+                          (unsigned long)src + size);
+
        inline_cnstr_jobdesc_blob_encap(desc, key_mod, src, dst, len);
+
+       debug("Descriptor dump:\n");
        for (i = 0; i < 14; i++)
-               printf("%x\n", *(desc + i));
+               debug("Word[%d]: %08x\n", i, *(desc + i));
+
+       size = ALIGN(sizeof(int) * MAX_CAAM_DESCSIZE, ARCH_DMA_MINALIGN);
+       flush_dcache_range((unsigned long)desc,
+                          (unsigned long)desc + size);
+
        ret = run_descriptor_jr(desc);
 
-       if (ret)
-               printf("Error in Encapsulation %d\n", ret);
+       if (ret) {
+               printf("Error in blob encapsulation: %d\n", ret);
+       } else {
+               size = ALIGN(BLOB_SIZE(len), ARCH_DMA_MINALIGN);
+               invalidate_dcache_range((unsigned long)dst,
+                                       (unsigned long)dst + size);
+
+               puts("Blob encapsulation successful.\n");
+       }
 
        free(desc);
        return ret;