1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright 2014 Freescale Semiconductor, Inc.
4 *
5 */
6
7 #include <common.h>
8 #include <cpu_func.h>
9 #include <log.h>
10 #include <malloc.h>
11 #include <memalign.h>
12 #include <fsl_sec.h>
13 #include <asm/cache.h>
14 #include <linux/errno.h>
15 #include "jobdesc.h"
16 #include "desc.h"
17 #include "jr.h"
18
19 /**
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
25 *
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.
28 *
29 * Returns zero on success, negative on error.
30 */
blob_decap(u8 * key_mod,u8 * src,u8 * dst,u32 len)31 int blob_decap(u8 *key_mod, u8 *src, u8 *dst, u32 len)
32 {
33 int ret, size, i = 0;
34 u32 *desc;
35
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");
40 return -EINVAL;
41 }
42
43 printf("\nDecapsulating blob to get data\n");
44 desc = malloc_cache_aligned(sizeof(int) * MAX_CAAM_DESCSIZE);
45 if (!desc) {
46 debug("Not enough memory for descriptor allocation\n");
47 return -ENOMEM;
48 }
49
50 size = ALIGN(16, ARCH_DMA_MINALIGN);
51 flush_dcache_range((unsigned long)key_mod,
52 (unsigned long)key_mod + size);
53
54 size = ALIGN(BLOB_SIZE(len), ARCH_DMA_MINALIGN);
55 flush_dcache_range((unsigned long)src,
56 (unsigned long)src + size);
57
58 inline_cnstr_jobdesc_blob_decap(desc, key_mod, src, dst, len);
59
60 debug("Descriptor dump:\n");
61 for (i = 0; i < 14; i++)
62 debug("Word[%d]: %08x\n", i, *(desc + i));
63
64 size = ALIGN(sizeof(int) * MAX_CAAM_DESCSIZE, ARCH_DMA_MINALIGN);
65 flush_dcache_range((unsigned long)desc,
66 (unsigned long)desc + size);
67
68 flush_dcache_range((unsigned long)dst,
69 (unsigned long)dst + size);
70
71 ret = run_descriptor_jr(desc);
72
73 if (ret) {
74 printf("Error in blob decapsulation: %d\n", ret);
75 } else {
76 size = ALIGN(len, ARCH_DMA_MINALIGN);
77 invalidate_dcache_range((unsigned long)dst,
78 (unsigned long)dst + size);
79
80 puts("Blob decapsulation successful.\n");
81 }
82
83 free(desc);
84 return ret;
85 }
86
87 /**
88 * blob_encap() - Encapsulate the data as a blob
89 * @key_mod: - Key modifier address
90 * @src: - Source address (data)
91 * @dst: - Destination address (blob)
92 * @len: - Size of data to be encapsulated
93 *
94 * Note: Start and end of the key_mod, src and dst buffers have to be aligned to
95 * the cache line size (ARCH_DMA_MINALIGN) for the CAAM operation to succeed.
96 *
97 * Returns zero on success, negative on error.
98 */
blob_encap(u8 * key_mod,u8 * src,u8 * dst,u32 len)99 int blob_encap(u8 *key_mod, u8 *src, u8 *dst, u32 len)
100 {
101 int ret, size, i = 0;
102 u32 *desc;
103
104 if (!IS_ALIGNED((uintptr_t)key_mod, ARCH_DMA_MINALIGN) ||
105 !IS_ALIGNED((uintptr_t)src, ARCH_DMA_MINALIGN) ||
106 !IS_ALIGNED((uintptr_t)dst, ARCH_DMA_MINALIGN)) {
107 puts("Error: blob_encap: Address arguments are not aligned!\n");
108 return -EINVAL;
109 }
110
111 printf("\nEncapsulating data to form blob\n");
112 desc = malloc_cache_aligned(sizeof(int) * MAX_CAAM_DESCSIZE);
113 if (!desc) {
114 debug("Not enough memory for descriptor allocation\n");
115 return -ENOMEM;
116 }
117
118 size = ALIGN(16, ARCH_DMA_MINALIGN);
119 flush_dcache_range((unsigned long)key_mod,
120 (unsigned long)key_mod + size);
121
122 size = ALIGN(len, ARCH_DMA_MINALIGN);
123 flush_dcache_range((unsigned long)src,
124 (unsigned long)src + size);
125
126 inline_cnstr_jobdesc_blob_encap(desc, key_mod, src, dst, len);
127
128 debug("Descriptor dump:\n");
129 for (i = 0; i < 14; i++)
130 debug("Word[%d]: %08x\n", i, *(desc + i));
131
132 size = ALIGN(sizeof(int) * MAX_CAAM_DESCSIZE, ARCH_DMA_MINALIGN);
133 flush_dcache_range((unsigned long)desc,
134 (unsigned long)desc + size);
135
136 flush_dcache_range((unsigned long)dst,
137 (unsigned long)dst + size);
138
139 ret = run_descriptor_jr(desc);
140
141 if (ret) {
142 printf("Error in blob encapsulation: %d\n", ret);
143 } else {
144 size = ALIGN(BLOB_SIZE(len), ARCH_DMA_MINALIGN);
145 invalidate_dcache_range((unsigned long)dst,
146 (unsigned long)dst + size);
147
148 puts("Blob encapsulation successful.\n");
149 }
150
151 free(desc);
152 return ret;
153 }
154
155 #ifdef CONFIG_CMD_DEKBLOB
blob_dek(const u8 * src,u8 * dst,u8 len)156 int blob_dek(const u8 *src, u8 *dst, u8 len)
157 {
158 int ret, size, i = 0;
159 u32 *desc;
160
161 int out_sz = WRP_HDR_SIZE + len + KEY_BLOB_SIZE + MAC_SIZE;
162
163 puts("\nEncapsulating provided DEK to form blob\n");
164 desc = memalign(ARCH_DMA_MINALIGN,
165 sizeof(uint32_t) * DEK_BLOB_DESCSIZE);
166 if (!desc) {
167 debug("Not enough memory for descriptor allocation\n");
168 return -ENOMEM;
169 }
170
171 ret = inline_cnstr_jobdesc_blob_dek(desc, src, dst, len);
172 if (ret) {
173 debug("Error in Job Descriptor Construction: %d\n", ret);
174 } else {
175 size = roundup(sizeof(uint32_t) * DEK_BLOB_DESCSIZE,
176 ARCH_DMA_MINALIGN);
177 flush_dcache_range((unsigned long)desc,
178 (unsigned long)desc + size);
179 size = roundup(sizeof(uint8_t) * out_sz, ARCH_DMA_MINALIGN);
180 flush_dcache_range((unsigned long)dst,
181 (unsigned long)dst + size);
182
183 ret = run_descriptor_jr(desc);
184 }
185
186 if (ret) {
187 debug("Error in Encapsulation %d\n", ret);
188 goto err;
189 }
190
191 size = roundup(out_sz, ARCH_DMA_MINALIGN);
192 invalidate_dcache_range((unsigned long)dst, (unsigned long)dst+size);
193
194 puts("DEK Blob\n");
195 for (i = 0; i < out_sz; i++)
196 printf("%02X", ((uint8_t *)dst)[i]);
197 printf("\n");
198
199 err:
200 free(desc);
201 return ret;
202 }
203 #endif
204