Ruchika Gupta | ac1b269 | 2014-10-15 11:35:30 +0530 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2014 Freescale Semiconductor, Inc. |
| 3 | * |
| 4 | * SPDX-License-Identifier: GPL-2.0+ |
| 5 | * |
| 6 | */ |
| 7 | |
| 8 | #include <common.h> |
| 9 | #include <malloc.h> |
| 10 | #include "jobdesc.h" |
| 11 | #include "desc.h" |
| 12 | #include "jr.h" |
gaurav rana | ef20159 | 2015-02-20 12:51:46 +0530 | [diff] [blame] | 13 | #include "fsl_hash.h" |
| 14 | #include <hw_sha.h> |
| 15 | #include <asm-generic/errno.h> |
Ruchika Gupta | ac1b269 | 2014-10-15 11:35:30 +0530 | [diff] [blame] | 16 | |
| 17 | #define CRYPTO_MAX_ALG_NAME 80 |
| 18 | #define SHA1_DIGEST_SIZE 20 |
| 19 | #define SHA256_DIGEST_SIZE 32 |
| 20 | |
| 21 | struct caam_hash_template { |
| 22 | char name[CRYPTO_MAX_ALG_NAME]; |
| 23 | unsigned int digestsize; |
| 24 | u32 alg_type; |
| 25 | }; |
| 26 | |
| 27 | enum caam_hash_algos { |
| 28 | SHA1 = 0, |
| 29 | SHA256 |
| 30 | }; |
| 31 | |
| 32 | static struct caam_hash_template driver_hash[] = { |
| 33 | { |
| 34 | .name = "sha1", |
| 35 | .digestsize = SHA1_DIGEST_SIZE, |
| 36 | .alg_type = OP_ALG_ALGSEL_SHA1, |
| 37 | }, |
| 38 | { |
| 39 | .name = "sha256", |
| 40 | .digestsize = SHA256_DIGEST_SIZE, |
| 41 | .alg_type = OP_ALG_ALGSEL_SHA256, |
| 42 | }, |
| 43 | }; |
| 44 | |
gaurav rana | ef20159 | 2015-02-20 12:51:46 +0530 | [diff] [blame] | 45 | static enum caam_hash_algos get_hash_type(struct hash_algo *algo) |
| 46 | { |
| 47 | if (!strcmp(algo->name, driver_hash[SHA1].name)) |
| 48 | return SHA1; |
| 49 | else |
| 50 | return SHA256; |
| 51 | } |
| 52 | |
| 53 | /* Create the context for progressive hashing using h/w acceleration. |
| 54 | * |
| 55 | * @ctxp: Pointer to the pointer of the context for hashing |
| 56 | * @caam_algo: Enum for SHA1 or SHA256 |
| 57 | * @return 0 if ok, -ENOMEM on error |
| 58 | */ |
| 59 | static int caam_hash_init(void **ctxp, enum caam_hash_algos caam_algo) |
| 60 | { |
| 61 | *ctxp = calloc(1, sizeof(struct sha_ctx)); |
| 62 | if (*ctxp == NULL) { |
| 63 | debug("Cannot allocate memory for context\n"); |
| 64 | return -ENOMEM; |
| 65 | } |
| 66 | return 0; |
| 67 | } |
| 68 | |
| 69 | /* |
| 70 | * Update sg table for progressive hashing using h/w acceleration |
| 71 | * |
| 72 | * The context is freed by this function if an error occurs. |
| 73 | * We support at most 32 Scatter/Gather Entries. |
| 74 | * |
| 75 | * @hash_ctx: Pointer to the context for hashing |
| 76 | * @buf: Pointer to the buffer being hashed |
| 77 | * @size: Size of the buffer being hashed |
| 78 | * @is_last: 1 if this is the last update; 0 otherwise |
| 79 | * @caam_algo: Enum for SHA1 or SHA256 |
| 80 | * @return 0 if ok, -EINVAL on error |
| 81 | */ |
| 82 | static int caam_hash_update(void *hash_ctx, const void *buf, |
| 83 | unsigned int size, int is_last, |
| 84 | enum caam_hash_algos caam_algo) |
| 85 | { |
| 86 | uint32_t final = 0; |
Aneesh Bansal | 4342182 | 2015-10-29 22:58:03 +0530 | [diff] [blame] | 87 | phys_addr_t addr = virt_to_phys((void *)buf); |
gaurav rana | ef20159 | 2015-02-20 12:51:46 +0530 | [diff] [blame] | 88 | struct sha_ctx *ctx = hash_ctx; |
| 89 | |
| 90 | if (ctx->sg_num >= MAX_SG_32) { |
| 91 | free(ctx); |
| 92 | return -EINVAL; |
| 93 | } |
| 94 | |
| 95 | #ifdef CONFIG_PHYS_64BIT |
Aneesh Bansal | 4342182 | 2015-10-29 22:58:03 +0530 | [diff] [blame] | 96 | sec_out32(&ctx->sg_tbl[ctx->sg_num].addr_hi, (uint32_t)(addr >> 32)); |
gaurav rana | ef20159 | 2015-02-20 12:51:46 +0530 | [diff] [blame] | 97 | #else |
Aneesh Bansal | 4342182 | 2015-10-29 22:58:03 +0530 | [diff] [blame] | 98 | sec_out32(&ctx->sg_tbl[ctx->sg_num].addr_hi, 0x0); |
gaurav rana | ef20159 | 2015-02-20 12:51:46 +0530 | [diff] [blame] | 99 | #endif |
Aneesh Bansal | 4342182 | 2015-10-29 22:58:03 +0530 | [diff] [blame] | 100 | sec_out32(&ctx->sg_tbl[ctx->sg_num].addr_lo, (uint32_t)addr); |
gaurav rana | ef20159 | 2015-02-20 12:51:46 +0530 | [diff] [blame] | 101 | |
| 102 | sec_out32(&ctx->sg_tbl[ctx->sg_num].len_flag, |
| 103 | (size & SG_ENTRY_LENGTH_MASK)); |
| 104 | |
| 105 | ctx->sg_num++; |
| 106 | |
| 107 | if (is_last) { |
| 108 | final = sec_in32(&ctx->sg_tbl[ctx->sg_num - 1].len_flag) | |
| 109 | SG_ENTRY_FINAL_BIT; |
| 110 | sec_out32(&ctx->sg_tbl[ctx->sg_num - 1].len_flag, final); |
| 111 | } |
| 112 | |
| 113 | return 0; |
| 114 | } |
| 115 | |
| 116 | /* |
| 117 | * Perform progressive hashing on the given buffer and copy hash at |
| 118 | * destination buffer |
| 119 | * |
| 120 | * The context is freed after completion of hash operation. |
| 121 | * |
| 122 | * @hash_ctx: Pointer to the context for hashing |
| 123 | * @dest_buf: Pointer to the destination buffer where hash is to be copied |
| 124 | * @size: Size of the buffer being hashed |
| 125 | * @caam_algo: Enum for SHA1 or SHA256 |
| 126 | * @return 0 if ok, -EINVAL on error |
| 127 | */ |
| 128 | static int caam_hash_finish(void *hash_ctx, void *dest_buf, |
| 129 | int size, enum caam_hash_algos caam_algo) |
| 130 | { |
| 131 | uint32_t len = 0; |
| 132 | struct sha_ctx *ctx = hash_ctx; |
| 133 | int i = 0, ret = 0; |
| 134 | |
| 135 | if (size < driver_hash[caam_algo].digestsize) { |
| 136 | free(ctx); |
| 137 | return -EINVAL; |
| 138 | } |
| 139 | |
| 140 | for (i = 0; i < ctx->sg_num; i++) |
| 141 | len += (sec_in32(&ctx->sg_tbl[i].len_flag) & |
| 142 | SG_ENTRY_LENGTH_MASK); |
| 143 | |
| 144 | inline_cnstr_jobdesc_hash(ctx->sha_desc, (uint8_t *)ctx->sg_tbl, len, |
| 145 | ctx->hash, |
| 146 | driver_hash[caam_algo].alg_type, |
| 147 | driver_hash[caam_algo].digestsize, |
| 148 | 1); |
| 149 | |
| 150 | ret = run_descriptor_jr(ctx->sha_desc); |
| 151 | |
| 152 | if (ret) |
| 153 | debug("Error %x\n", ret); |
| 154 | else |
| 155 | memcpy(dest_buf, ctx->hash, sizeof(ctx->hash)); |
| 156 | |
| 157 | free(ctx); |
| 158 | return ret; |
| 159 | } |
| 160 | |
Ruchika Gupta | ac1b269 | 2014-10-15 11:35:30 +0530 | [diff] [blame] | 161 | int caam_hash(const unsigned char *pbuf, unsigned int buf_len, |
| 162 | unsigned char *pout, enum caam_hash_algos algo) |
| 163 | { |
| 164 | int ret = 0; |
| 165 | uint32_t *desc; |
| 166 | |
| 167 | desc = malloc(sizeof(int) * MAX_CAAM_DESCSIZE); |
| 168 | if (!desc) { |
| 169 | debug("Not enough memory for descriptor allocation\n"); |
gaurav rana | ef20159 | 2015-02-20 12:51:46 +0530 | [diff] [blame] | 170 | return -ENOMEM; |
Ruchika Gupta | ac1b269 | 2014-10-15 11:35:30 +0530 | [diff] [blame] | 171 | } |
| 172 | |
| 173 | inline_cnstr_jobdesc_hash(desc, pbuf, buf_len, pout, |
| 174 | driver_hash[algo].alg_type, |
| 175 | driver_hash[algo].digestsize, |
| 176 | 0); |
| 177 | |
| 178 | ret = run_descriptor_jr(desc); |
| 179 | |
| 180 | free(desc); |
| 181 | return ret; |
| 182 | } |
| 183 | |
| 184 | void hw_sha256(const unsigned char *pbuf, unsigned int buf_len, |
| 185 | unsigned char *pout, unsigned int chunk_size) |
| 186 | { |
| 187 | if (caam_hash(pbuf, buf_len, pout, SHA256)) |
| 188 | printf("CAAM was not setup properly or it is faulty\n"); |
| 189 | } |
| 190 | |
| 191 | void hw_sha1(const unsigned char *pbuf, unsigned int buf_len, |
| 192 | unsigned char *pout, unsigned int chunk_size) |
| 193 | { |
| 194 | if (caam_hash(pbuf, buf_len, pout, SHA1)) |
| 195 | printf("CAAM was not setup properly or it is faulty\n"); |
| 196 | } |
gaurav rana | ef20159 | 2015-02-20 12:51:46 +0530 | [diff] [blame] | 197 | |
| 198 | int hw_sha_init(struct hash_algo *algo, void **ctxp) |
| 199 | { |
| 200 | return caam_hash_init(ctxp, get_hash_type(algo)); |
| 201 | } |
| 202 | |
| 203 | int hw_sha_update(struct hash_algo *algo, void *ctx, const void *buf, |
| 204 | unsigned int size, int is_last) |
| 205 | { |
| 206 | return caam_hash_update(ctx, buf, size, is_last, get_hash_type(algo)); |
| 207 | } |
| 208 | |
| 209 | int hw_sha_finish(struct hash_algo *algo, void *ctx, void *dest_buf, |
| 210 | int size) |
| 211 | { |
| 212 | return caam_hash_finish(ctx, dest_buf, size, get_hash_type(algo)); |
| 213 | } |