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 /* clear the blob data output buffer */
75 memset(dst, 0x00, len);
76 size = ALIGN(len, ARCH_DMA_MINALIGN);
77 flush_dcache_range((unsigned long)dst, (unsigned long)dst + size);
78 printf("Error in blob decapsulation: %d\n", ret);
79 } else {
80 size = ALIGN(len, ARCH_DMA_MINALIGN);
81 invalidate_dcache_range((unsigned long)dst,
82 (unsigned long)dst + size);
83
84 puts("Blob decapsulation successful.\n");
85 }
86
87 free(desc);
88 return ret;
89 }
90
91 /**
92 * blob_encap() - Encapsulate the data as a blob
93 * @key_mod: - Key modifier address
94 * @src: - Source address (data)
95 * @dst: - Destination address (blob)
96 * @len: - Size of data to be encapsulated
97 *
98 * Note: Start and end of the key_mod, src and dst buffers have to be aligned to
99 * the cache line size (ARCH_DMA_MINALIGN) for the CAAM operation to succeed.
100 *
101 * Returns zero on success, negative on error.
102 */
blob_encap(u8 * key_mod,u8 * src,u8 * dst,u32 len)103 int blob_encap(u8 *key_mod, u8 *src, u8 *dst, u32 len)
104 {
105 int ret, size, i = 0;
106 u32 *desc;
107
108 if (!IS_ALIGNED((uintptr_t)key_mod, ARCH_DMA_MINALIGN) ||
109 !IS_ALIGNED((uintptr_t)src, ARCH_DMA_MINALIGN) ||
110 !IS_ALIGNED((uintptr_t)dst, ARCH_DMA_MINALIGN)) {
111 puts("Error: blob_encap: Address arguments are not aligned!\n");
112 return -EINVAL;
113 }
114
115 printf("\nEncapsulating data to form blob\n");
116 desc = malloc_cache_aligned(sizeof(int) * MAX_CAAM_DESCSIZE);
117 if (!desc) {
118 debug("Not enough memory for descriptor allocation\n");
119 return -ENOMEM;
120 }
121
122 size = ALIGN(16, ARCH_DMA_MINALIGN);
123 flush_dcache_range((unsigned long)key_mod,
124 (unsigned long)key_mod + size);
125
126 size = ALIGN(len, ARCH_DMA_MINALIGN);
127 flush_dcache_range((unsigned long)src,
128 (unsigned long)src + size);
129
130 inline_cnstr_jobdesc_blob_encap(desc, key_mod, src, dst, len);
131
132 debug("Descriptor dump:\n");
133 for (i = 0; i < 14; i++)
134 debug("Word[%d]: %08x\n", i, *(desc + i));
135
136 size = ALIGN(sizeof(int) * MAX_CAAM_DESCSIZE, ARCH_DMA_MINALIGN);
137 flush_dcache_range((unsigned long)desc,
138 (unsigned long)desc + size);
139
140 flush_dcache_range((unsigned long)dst,
141 (unsigned long)dst + size);
142
143 ret = run_descriptor_jr(desc);
144
145 if (ret) {
146 printf("Error in blob encapsulation: %d\n", ret);
147 } else {
148 size = ALIGN(BLOB_SIZE(len), ARCH_DMA_MINALIGN);
149 invalidate_dcache_range((unsigned long)dst,
150 (unsigned long)dst + size);
151
152 puts("Blob encapsulation successful.\n");
153 }
154
155 free(desc);
156 return ret;
157 }
158
159 #ifdef CONFIG_CMD_DEKBLOB
blob_dek(const u8 * src,u8 * dst,u8 len)160 int blob_dek(const u8 *src, u8 *dst, u8 len)
161 {
162 int ret, size, i = 0;
163 u32 *desc;
164
165 int out_sz = WRP_HDR_SIZE + len + KEY_BLOB_SIZE + MAC_SIZE;
166
167 puts("\nEncapsulating provided DEK to form blob\n");
168 desc = memalign(ARCH_DMA_MINALIGN,
169 sizeof(uint32_t) * DEK_BLOB_DESCSIZE);
170 if (!desc) {
171 debug("Not enough memory for descriptor allocation\n");
172 return -ENOMEM;
173 }
174
175 ret = inline_cnstr_jobdesc_blob_dek(desc, src, dst, len);
176 if (ret) {
177 debug("Error in Job Descriptor Construction: %d\n", ret);
178 } else {
179 size = roundup(sizeof(uint32_t) * DEK_BLOB_DESCSIZE,
180 ARCH_DMA_MINALIGN);
181 flush_dcache_range((unsigned long)desc,
182 (unsigned long)desc + size);
183 size = roundup(sizeof(uint8_t) * out_sz, ARCH_DMA_MINALIGN);
184 flush_dcache_range((unsigned long)dst,
185 (unsigned long)dst + size);
186
187 ret = run_descriptor_jr(desc);
188 }
189
190 if (ret) {
191 debug("Error in Encapsulation %d\n", ret);
192 goto err;
193 }
194
195 size = roundup(out_sz, ARCH_DMA_MINALIGN);
196 invalidate_dcache_range((unsigned long)dst, (unsigned long)dst+size);
197
198 puts("DEK Blob\n");
199 for (i = 0; i < out_sz; i++)
200 printf("%02X", ((uint8_t *)dst)[i]);
201 printf("\n");
202
203 err:
204 free(desc);
205 return ret;
206 }
207 #endif
208