2 * Copyright 2014 Freescale Semiconductor, Inc.
4 * SPDX-License-Identifier: GPL-2.0+
12 #include <linux/errno.h>
18 * blob_decap() - Decapsulate the data from a blob
19 * @key_mod: - Key modifier address
20 * @src: - Source address (blob)
21 * @dst: - Destination address (data)
22 * @len: - Size of decapsulated data
24 * Note: Start and end of the key_mod, src and dst buffers have to be aligned to
25 * the cache line size (ARCH_DMA_MINALIGN) for the CAAM operation to succeed.
27 * Returns zero on success, negative on error.
29 int blob_decap(u8 *key_mod, u8 *src, u8 *dst, u32 len)
34 if (!IS_ALIGNED((uintptr_t)key_mod, ARCH_DMA_MINALIGN) ||
35 !IS_ALIGNED((uintptr_t)src, ARCH_DMA_MINALIGN) ||
36 !IS_ALIGNED((uintptr_t)dst, ARCH_DMA_MINALIGN)) {
37 puts("Error: blob_decap: Address arguments are not aligned!\n");
41 printf("\nDecapsulating blob to get data\n");
42 desc = malloc_cache_aligned(sizeof(int) * MAX_CAAM_DESCSIZE);
44 debug("Not enough memory for descriptor allocation\n");
48 size = ALIGN(16, ARCH_DMA_MINALIGN);
49 flush_dcache_range((unsigned long)key_mod,
50 (unsigned long)key_mod + size);
52 size = ALIGN(BLOB_SIZE(len), ARCH_DMA_MINALIGN);
53 flush_dcache_range((unsigned long)src,
54 (unsigned long)src + size);
56 inline_cnstr_jobdesc_blob_decap(desc, key_mod, src, dst, len);
58 debug("Descriptor dump:\n");
59 for (i = 0; i < 14; i++)
60 debug("Word[%d]: %08x\n", i, *(desc + i));
62 size = ALIGN(sizeof(int) * MAX_CAAM_DESCSIZE, ARCH_DMA_MINALIGN);
63 flush_dcache_range((unsigned long)desc,
64 (unsigned long)desc + size);
66 ret = run_descriptor_jr(desc);
69 printf("Error in blob decapsulation: %d\n", ret);
71 size = ALIGN(len, ARCH_DMA_MINALIGN);
72 invalidate_dcache_range((unsigned long)dst,
73 (unsigned long)dst + size);
75 puts("Blob decapsulation successful.\n");
83 * blob_encap() - Encapsulate the data as a blob
84 * @key_mod: - Key modifier address
85 * @src: - Source address (data)
86 * @dst: - Destination address (blob)
87 * @len: - Size of data to be encapsulated
89 * Note: Start and end of the key_mod, src and dst buffers have to be aligned to
90 * the cache line size (ARCH_DMA_MINALIGN) for the CAAM operation to succeed.
92 * Returns zero on success, negative on error.
94 int blob_encap(u8 *key_mod, u8 *src, u8 *dst, u32 len)
99 if (!IS_ALIGNED((uintptr_t)key_mod, ARCH_DMA_MINALIGN) ||
100 !IS_ALIGNED((uintptr_t)src, ARCH_DMA_MINALIGN) ||
101 !IS_ALIGNED((uintptr_t)dst, ARCH_DMA_MINALIGN)) {
102 puts("Error: blob_encap: Address arguments are not aligned!\n");
106 printf("\nEncapsulating data to form blob\n");
107 desc = malloc_cache_aligned(sizeof(int) * MAX_CAAM_DESCSIZE);
109 debug("Not enough memory for descriptor allocation\n");
113 size = ALIGN(16, ARCH_DMA_MINALIGN);
114 flush_dcache_range((unsigned long)key_mod,
115 (unsigned long)key_mod + size);
117 size = ALIGN(len, ARCH_DMA_MINALIGN);
118 flush_dcache_range((unsigned long)src,
119 (unsigned long)src + size);
121 inline_cnstr_jobdesc_blob_encap(desc, key_mod, src, dst, len);
123 debug("Descriptor dump:\n");
124 for (i = 0; i < 14; i++)
125 debug("Word[%d]: %08x\n", i, *(desc + i));
127 size = ALIGN(sizeof(int) * MAX_CAAM_DESCSIZE, ARCH_DMA_MINALIGN);
128 flush_dcache_range((unsigned long)desc,
129 (unsigned long)desc + size);
131 ret = run_descriptor_jr(desc);
134 printf("Error in blob encapsulation: %d\n", ret);
136 size = ALIGN(BLOB_SIZE(len), ARCH_DMA_MINALIGN);
137 invalidate_dcache_range((unsigned long)dst,
138 (unsigned long)dst + size);
140 puts("Blob encapsulation successful.\n");
147 #ifdef CONFIG_CMD_DEKBLOB
148 int blob_dek(const u8 *src, u8 *dst, u8 len)
150 int ret, size, i = 0;
153 int out_sz = WRP_HDR_SIZE + len + KEY_BLOB_SIZE + MAC_SIZE;
155 puts("\nEncapsulating provided DEK to form blob\n");
156 desc = memalign(ARCH_DMA_MINALIGN,
157 sizeof(uint32_t) * DEK_BLOB_DESCSIZE);
159 debug("Not enough memory for descriptor allocation\n");
163 ret = inline_cnstr_jobdesc_blob_dek(desc, src, dst, len);
165 debug("Error in Job Descriptor Construction: %d\n", ret);
167 size = roundup(sizeof(uint32_t) * DEK_BLOB_DESCSIZE,
169 flush_dcache_range((unsigned long)desc,
170 (unsigned long)desc + size);
171 size = roundup(sizeof(uint8_t) * out_sz, ARCH_DMA_MINALIGN);
172 flush_dcache_range((unsigned long)dst,
173 (unsigned long)dst + size);
175 ret = run_descriptor_jr(desc);
179 debug("Error in Encapsulation %d\n", ret);
183 size = roundup(out_sz, ARCH_DMA_MINALIGN);
184 invalidate_dcache_range((unsigned long)dst, (unsigned long)dst+size);
187 for (i = 0; i < out_sz; i++)
188 printf("%02X", ((uint8_t *)dst)[i]);