1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright 2014 Freescale Semiconductor, Inc.
13 #include <asm/cache.h>
14 #include <linux/errno.h>
20 * blob_decap() - Decapsulate the data from a blob
21 * @key_mod: - Key modifier address
22 * @src: - Source address (blob)
23 * @dst: - Destination address (data)
24 * @len: - Size of decapsulated data
26 * Note: Start and end of the key_mod, src and dst buffers have to be aligned to
27 * the cache line size (ARCH_DMA_MINALIGN) for the CAAM operation to succeed.
29 * Returns zero on success, negative on error.
31 int blob_decap(u8 *key_mod, u8 *src, u8 *dst, u32 len)
36 if (!IS_ALIGNED((uintptr_t)key_mod, ARCH_DMA_MINALIGN) ||
37 !IS_ALIGNED((uintptr_t)src, ARCH_DMA_MINALIGN) ||
38 !IS_ALIGNED((uintptr_t)dst, ARCH_DMA_MINALIGN)) {
39 puts("Error: blob_decap: Address arguments are not aligned!\n");
43 printf("\nDecapsulating blob to get data\n");
44 desc = malloc_cache_aligned(sizeof(int) * MAX_CAAM_DESCSIZE);
46 debug("Not enough memory for descriptor allocation\n");
50 size = ALIGN(16, ARCH_DMA_MINALIGN);
51 flush_dcache_range((unsigned long)key_mod,
52 (unsigned long)key_mod + size);
54 size = ALIGN(BLOB_SIZE(len), ARCH_DMA_MINALIGN);
55 flush_dcache_range((unsigned long)src,
56 (unsigned long)src + size);
58 inline_cnstr_jobdesc_blob_decap(desc, key_mod, src, dst, len);
60 debug("Descriptor dump:\n");
61 for (i = 0; i < 14; i++)
62 debug("Word[%d]: %08x\n", i, *(desc + i));
64 size = ALIGN(sizeof(int) * MAX_CAAM_DESCSIZE, ARCH_DMA_MINALIGN);
65 flush_dcache_range((unsigned long)desc,
66 (unsigned long)desc + size);
68 ret = run_descriptor_jr(desc);
71 printf("Error in blob decapsulation: %d\n", ret);
73 size = ALIGN(len, ARCH_DMA_MINALIGN);
74 invalidate_dcache_range((unsigned long)dst,
75 (unsigned long)dst + size);
77 puts("Blob decapsulation successful.\n");
85 * blob_encap() - Encapsulate the data as a blob
86 * @key_mod: - Key modifier address
87 * @src: - Source address (data)
88 * @dst: - Destination address (blob)
89 * @len: - Size of data to be encapsulated
91 * Note: Start and end of the key_mod, src and dst buffers have to be aligned to
92 * the cache line size (ARCH_DMA_MINALIGN) for the CAAM operation to succeed.
94 * Returns zero on success, negative on error.
96 int blob_encap(u8 *key_mod, u8 *src, u8 *dst, u32 len)
101 if (!IS_ALIGNED((uintptr_t)key_mod, ARCH_DMA_MINALIGN) ||
102 !IS_ALIGNED((uintptr_t)src, ARCH_DMA_MINALIGN) ||
103 !IS_ALIGNED((uintptr_t)dst, ARCH_DMA_MINALIGN)) {
104 puts("Error: blob_encap: Address arguments are not aligned!\n");
108 printf("\nEncapsulating data to form blob\n");
109 desc = malloc_cache_aligned(sizeof(int) * MAX_CAAM_DESCSIZE);
111 debug("Not enough memory for descriptor allocation\n");
115 size = ALIGN(16, ARCH_DMA_MINALIGN);
116 flush_dcache_range((unsigned long)key_mod,
117 (unsigned long)key_mod + size);
119 size = ALIGN(len, ARCH_DMA_MINALIGN);
120 flush_dcache_range((unsigned long)src,
121 (unsigned long)src + size);
123 inline_cnstr_jobdesc_blob_encap(desc, key_mod, src, dst, len);
125 debug("Descriptor dump:\n");
126 for (i = 0; i < 14; i++)
127 debug("Word[%d]: %08x\n", i, *(desc + i));
129 size = ALIGN(sizeof(int) * MAX_CAAM_DESCSIZE, ARCH_DMA_MINALIGN);
130 flush_dcache_range((unsigned long)desc,
131 (unsigned long)desc + size);
133 ret = run_descriptor_jr(desc);
136 printf("Error in blob encapsulation: %d\n", ret);
138 size = ALIGN(BLOB_SIZE(len), ARCH_DMA_MINALIGN);
139 invalidate_dcache_range((unsigned long)dst,
140 (unsigned long)dst + size);
142 puts("Blob encapsulation successful.\n");
149 #ifdef CONFIG_CMD_DEKBLOB
150 int blob_dek(const u8 *src, u8 *dst, u8 len)
152 int ret, size, i = 0;
155 int out_sz = WRP_HDR_SIZE + len + KEY_BLOB_SIZE + MAC_SIZE;
157 puts("\nEncapsulating provided DEK to form blob\n");
158 desc = memalign(ARCH_DMA_MINALIGN,
159 sizeof(uint32_t) * DEK_BLOB_DESCSIZE);
161 debug("Not enough memory for descriptor allocation\n");
165 ret = inline_cnstr_jobdesc_blob_dek(desc, src, dst, len);
167 debug("Error in Job Descriptor Construction: %d\n", ret);
169 size = roundup(sizeof(uint32_t) * DEK_BLOB_DESCSIZE,
171 flush_dcache_range((unsigned long)desc,
172 (unsigned long)desc + size);
173 size = roundup(sizeof(uint8_t) * out_sz, ARCH_DMA_MINALIGN);
174 flush_dcache_range((unsigned long)dst,
175 (unsigned long)dst + size);
177 ret = run_descriptor_jr(desc);
181 debug("Error in Encapsulation %d\n", ret);
185 size = roundup(out_sz, ARCH_DMA_MINALIGN);
186 invalidate_dcache_range((unsigned long)dst, (unsigned long)dst+size);
189 for (i = 0; i < out_sz; i++)
190 printf("%02X", ((uint8_t *)dst)[i]);