Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 1 | /* |
| 2 | * Support for Marvell's crypto engine which can be found on some Orion5X |
| 3 | * boards. |
| 4 | * |
| 5 | * Author: Sebastian Andrzej Siewior < sebastian at breakpoint dot cc > |
| 6 | * License: GPLv2 |
| 7 | * |
| 8 | */ |
| 9 | #include <crypto/aes.h> |
| 10 | #include <crypto/algapi.h> |
| 11 | #include <linux/crypto.h> |
| 12 | #include <linux/interrupt.h> |
| 13 | #include <linux/io.h> |
| 14 | #include <linux/kthread.h> |
| 15 | #include <linux/platform_device.h> |
| 16 | #include <linux/scatterlist.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 17 | #include <linux/slab.h> |
Paul Gortmaker | 4bb33cc | 2011-05-27 14:41:48 -0400 | [diff] [blame] | 18 | #include <linux/module.h> |
Uri Simchoni | 750052d | 2010-04-08 19:34:55 +0300 | [diff] [blame] | 19 | #include <crypto/internal/hash.h> |
| 20 | #include <crypto/sha.h> |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 21 | |
| 22 | #include "mv_cesa.h" |
Uri Simchoni | 750052d | 2010-04-08 19:34:55 +0300 | [diff] [blame] | 23 | |
| 24 | #define MV_CESA "MV-CESA:" |
| 25 | #define MAX_HW_HASH_SIZE 0xFFFF |
| 26 | |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 27 | /* |
| 28 | * STM: |
| 29 | * /---------------------------------------\ |
| 30 | * | | request complete |
| 31 | * \./ | |
| 32 | * IDLE -> new request -> BUSY -> done -> DEQUEUE |
| 33 | * /°\ | |
| 34 | * | | more scatter entries |
| 35 | * \________________/ |
| 36 | */ |
| 37 | enum engine_status { |
| 38 | ENGINE_IDLE, |
| 39 | ENGINE_BUSY, |
| 40 | ENGINE_W_DEQUEUE, |
| 41 | }; |
| 42 | |
| 43 | /** |
| 44 | * struct req_progress - used for every crypt request |
| 45 | * @src_sg_it: sg iterator for src |
| 46 | * @dst_sg_it: sg iterator for dst |
| 47 | * @sg_src_left: bytes left in src to process (scatter list) |
| 48 | * @src_start: offset to add to src start position (scatter list) |
Uri Simchoni | 750052d | 2010-04-08 19:34:55 +0300 | [diff] [blame] | 49 | * @crypt_len: length of current hw crypt/hash process |
Uri Simchoni | 3b61a90 | 2010-04-08 19:27:33 +0300 | [diff] [blame] | 50 | * @hw_nbytes: total bytes to process in hw for this request |
Uri Simchoni | f0d03de | 2010-04-08 19:31:48 +0300 | [diff] [blame] | 51 | * @copy_back: whether to copy data back (crypt) or not (hash) |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 52 | * @sg_dst_left: bytes left dst to process in this scatter list |
| 53 | * @dst_start: offset to add to dst start position (scatter list) |
Uri Simchoni | 7a5f691 | 2010-04-08 19:29:16 +0300 | [diff] [blame] | 54 | * @hw_processed_bytes: number of bytes processed by hw (request). |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 55 | * |
| 56 | * sg helper are used to iterate over the scatterlist. Since the size of the |
| 57 | * SRAM may be less than the scatter size, this struct struct is used to keep |
| 58 | * track of progress within current scatterlist. |
| 59 | */ |
| 60 | struct req_progress { |
| 61 | struct sg_mapping_iter src_sg_it; |
| 62 | struct sg_mapping_iter dst_sg_it; |
Uri Simchoni | a58094a | 2010-04-08 19:30:19 +0300 | [diff] [blame] | 63 | void (*complete) (void); |
| 64 | void (*process) (int is_first); |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 65 | |
| 66 | /* src mostly */ |
| 67 | int sg_src_left; |
| 68 | int src_start; |
| 69 | int crypt_len; |
Uri Simchoni | 3b61a90 | 2010-04-08 19:27:33 +0300 | [diff] [blame] | 70 | int hw_nbytes; |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 71 | /* dst mostly */ |
Uri Simchoni | f0d03de | 2010-04-08 19:31:48 +0300 | [diff] [blame] | 72 | int copy_back; |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 73 | int sg_dst_left; |
| 74 | int dst_start; |
Uri Simchoni | 7a5f691 | 2010-04-08 19:29:16 +0300 | [diff] [blame] | 75 | int hw_processed_bytes; |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 76 | }; |
| 77 | |
| 78 | struct crypto_priv { |
| 79 | void __iomem *reg; |
| 80 | void __iomem *sram; |
| 81 | int irq; |
| 82 | struct task_struct *queue_th; |
| 83 | |
| 84 | /* the lock protects queue and eng_st */ |
| 85 | spinlock_t lock; |
| 86 | struct crypto_queue queue; |
| 87 | enum engine_status eng_st; |
Uri Simchoni | 3b61a90 | 2010-04-08 19:27:33 +0300 | [diff] [blame] | 88 | struct crypto_async_request *cur_req; |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 89 | struct req_progress p; |
| 90 | int max_req_size; |
| 91 | int sram_size; |
Uri Simchoni | 750052d | 2010-04-08 19:34:55 +0300 | [diff] [blame] | 92 | int has_sha1; |
| 93 | int has_hmac_sha1; |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 94 | }; |
| 95 | |
| 96 | static struct crypto_priv *cpg; |
| 97 | |
| 98 | struct mv_ctx { |
| 99 | u8 aes_enc_key[AES_KEY_LEN]; |
| 100 | u32 aes_dec_key[8]; |
| 101 | int key_len; |
| 102 | u32 need_calc_aes_dkey; |
| 103 | }; |
| 104 | |
| 105 | enum crypto_op { |
| 106 | COP_AES_ECB, |
| 107 | COP_AES_CBC, |
| 108 | }; |
| 109 | |
| 110 | struct mv_req_ctx { |
| 111 | enum crypto_op op; |
| 112 | int decrypt; |
| 113 | }; |
| 114 | |
Uri Simchoni | 750052d | 2010-04-08 19:34:55 +0300 | [diff] [blame] | 115 | enum hash_op { |
| 116 | COP_SHA1, |
| 117 | COP_HMAC_SHA1 |
| 118 | }; |
| 119 | |
| 120 | struct mv_tfm_hash_ctx { |
| 121 | struct crypto_shash *fallback; |
| 122 | struct crypto_shash *base_hash; |
| 123 | u32 ivs[2 * SHA1_DIGEST_SIZE / 4]; |
| 124 | int count_add; |
| 125 | enum hash_op op; |
| 126 | }; |
| 127 | |
| 128 | struct mv_req_hash_ctx { |
| 129 | u64 count; |
| 130 | u32 state[SHA1_DIGEST_SIZE / 4]; |
| 131 | u8 buffer[SHA1_BLOCK_SIZE]; |
| 132 | int first_hash; /* marks that we don't have previous state */ |
| 133 | int last_chunk; /* marks that this is the 'final' request */ |
| 134 | int extra_bytes; /* unprocessed bytes in buffer */ |
| 135 | enum hash_op op; |
| 136 | int count_add; |
Uri Simchoni | 750052d | 2010-04-08 19:34:55 +0300 | [diff] [blame] | 137 | }; |
| 138 | |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 139 | static void compute_aes_dec_key(struct mv_ctx *ctx) |
| 140 | { |
| 141 | struct crypto_aes_ctx gen_aes_key; |
| 142 | int key_pos; |
| 143 | |
| 144 | if (!ctx->need_calc_aes_dkey) |
| 145 | return; |
| 146 | |
| 147 | crypto_aes_expand_key(&gen_aes_key, ctx->aes_enc_key, ctx->key_len); |
| 148 | |
| 149 | key_pos = ctx->key_len + 24; |
| 150 | memcpy(ctx->aes_dec_key, &gen_aes_key.key_enc[key_pos], 4 * 4); |
| 151 | switch (ctx->key_len) { |
| 152 | case AES_KEYSIZE_256: |
| 153 | key_pos -= 2; |
| 154 | /* fall */ |
| 155 | case AES_KEYSIZE_192: |
| 156 | key_pos -= 2; |
| 157 | memcpy(&ctx->aes_dec_key[4], &gen_aes_key.key_enc[key_pos], |
| 158 | 4 * 4); |
| 159 | break; |
| 160 | } |
| 161 | ctx->need_calc_aes_dkey = 0; |
| 162 | } |
| 163 | |
| 164 | static int mv_setkey_aes(struct crypto_ablkcipher *cipher, const u8 *key, |
| 165 | unsigned int len) |
| 166 | { |
| 167 | struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher); |
| 168 | struct mv_ctx *ctx = crypto_tfm_ctx(tfm); |
| 169 | |
| 170 | switch (len) { |
| 171 | case AES_KEYSIZE_128: |
| 172 | case AES_KEYSIZE_192: |
| 173 | case AES_KEYSIZE_256: |
| 174 | break; |
| 175 | default: |
| 176 | crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN); |
| 177 | return -EINVAL; |
| 178 | } |
| 179 | ctx->key_len = len; |
| 180 | ctx->need_calc_aes_dkey = 1; |
| 181 | |
| 182 | memcpy(ctx->aes_enc_key, key, AES_KEY_LEN); |
| 183 | return 0; |
| 184 | } |
| 185 | |
Uri Simchoni | 15d4dd3 | 2010-04-08 19:27:02 +0300 | [diff] [blame] | 186 | static void copy_src_to_buf(struct req_progress *p, char *dbuf, int len) |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 187 | { |
| 188 | int ret; |
Uri Simchoni | 15d4dd3 | 2010-04-08 19:27:02 +0300 | [diff] [blame] | 189 | void *sbuf; |
Phil Sutter | 6677a77 | 2011-05-05 15:29:02 +0200 | [diff] [blame] | 190 | int copy_len; |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 191 | |
Phil Sutter | 6677a77 | 2011-05-05 15:29:02 +0200 | [diff] [blame] | 192 | while (len) { |
Uri Simchoni | 15d4dd3 | 2010-04-08 19:27:02 +0300 | [diff] [blame] | 193 | if (!p->sg_src_left) { |
| 194 | ret = sg_miter_next(&p->src_sg_it); |
| 195 | BUG_ON(!ret); |
| 196 | p->sg_src_left = p->src_sg_it.length; |
| 197 | p->src_start = 0; |
| 198 | } |
| 199 | |
| 200 | sbuf = p->src_sg_it.addr + p->src_start; |
| 201 | |
Phil Sutter | 6677a77 | 2011-05-05 15:29:02 +0200 | [diff] [blame] | 202 | copy_len = min(p->sg_src_left, len); |
| 203 | memcpy(dbuf, sbuf, copy_len); |
| 204 | |
| 205 | p->src_start += copy_len; |
| 206 | p->sg_src_left -= copy_len; |
| 207 | |
| 208 | len -= copy_len; |
| 209 | dbuf += copy_len; |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 210 | } |
Uri Simchoni | 15d4dd3 | 2010-04-08 19:27:02 +0300 | [diff] [blame] | 211 | } |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 212 | |
Uri Simchoni | 3b61a90 | 2010-04-08 19:27:33 +0300 | [diff] [blame] | 213 | static void setup_data_in(void) |
Uri Simchoni | 15d4dd3 | 2010-04-08 19:27:02 +0300 | [diff] [blame] | 214 | { |
| 215 | struct req_progress *p = &cpg->p; |
Uri Simchoni | 0c5c6c4 | 2010-04-08 19:33:26 +0300 | [diff] [blame] | 216 | int data_in_sram = |
Uri Simchoni | 7a5f691 | 2010-04-08 19:29:16 +0300 | [diff] [blame] | 217 | min(p->hw_nbytes - p->hw_processed_bytes, cpg->max_req_size); |
Uri Simchoni | 0c5c6c4 | 2010-04-08 19:33:26 +0300 | [diff] [blame] | 218 | copy_src_to_buf(p, cpg->sram + SRAM_DATA_IN_START + p->crypt_len, |
| 219 | data_in_sram - p->crypt_len); |
| 220 | p->crypt_len = data_in_sram; |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 221 | } |
| 222 | |
| 223 | static void mv_process_current_q(int first_block) |
| 224 | { |
Uri Simchoni | 3b61a90 | 2010-04-08 19:27:33 +0300 | [diff] [blame] | 225 | struct ablkcipher_request *req = ablkcipher_request_cast(cpg->cur_req); |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 226 | struct mv_ctx *ctx = crypto_tfm_ctx(req->base.tfm); |
| 227 | struct mv_req_ctx *req_ctx = ablkcipher_request_ctx(req); |
| 228 | struct sec_accel_config op; |
| 229 | |
| 230 | switch (req_ctx->op) { |
| 231 | case COP_AES_ECB: |
| 232 | op.config = CFG_OP_CRYPT_ONLY | CFG_ENCM_AES | CFG_ENC_MODE_ECB; |
| 233 | break; |
| 234 | case COP_AES_CBC: |
Uri Simchoni | 6bc6fcd | 2010-04-08 19:25:56 +0300 | [diff] [blame] | 235 | default: |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 236 | op.config = CFG_OP_CRYPT_ONLY | CFG_ENCM_AES | CFG_ENC_MODE_CBC; |
| 237 | op.enc_iv = ENC_IV_POINT(SRAM_DATA_IV) | |
| 238 | ENC_IV_BUF_POINT(SRAM_DATA_IV_BUF); |
| 239 | if (first_block) |
| 240 | memcpy(cpg->sram + SRAM_DATA_IV, req->info, 16); |
| 241 | break; |
| 242 | } |
| 243 | if (req_ctx->decrypt) { |
| 244 | op.config |= CFG_DIR_DEC; |
| 245 | memcpy(cpg->sram + SRAM_DATA_KEY_P, ctx->aes_dec_key, |
| 246 | AES_KEY_LEN); |
| 247 | } else { |
| 248 | op.config |= CFG_DIR_ENC; |
| 249 | memcpy(cpg->sram + SRAM_DATA_KEY_P, ctx->aes_enc_key, |
| 250 | AES_KEY_LEN); |
| 251 | } |
| 252 | |
| 253 | switch (ctx->key_len) { |
| 254 | case AES_KEYSIZE_128: |
| 255 | op.config |= CFG_AES_LEN_128; |
| 256 | break; |
| 257 | case AES_KEYSIZE_192: |
| 258 | op.config |= CFG_AES_LEN_192; |
| 259 | break; |
| 260 | case AES_KEYSIZE_256: |
| 261 | op.config |= CFG_AES_LEN_256; |
| 262 | break; |
| 263 | } |
| 264 | op.enc_p = ENC_P_SRC(SRAM_DATA_IN_START) | |
| 265 | ENC_P_DST(SRAM_DATA_OUT_START); |
| 266 | op.enc_key_p = SRAM_DATA_KEY_P; |
| 267 | |
Uri Simchoni | 3b61a90 | 2010-04-08 19:27:33 +0300 | [diff] [blame] | 268 | setup_data_in(); |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 269 | op.enc_len = cpg->p.crypt_len; |
| 270 | memcpy(cpg->sram + SRAM_CONFIG, &op, |
| 271 | sizeof(struct sec_accel_config)); |
| 272 | |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 273 | /* GO */ |
| 274 | writel(SEC_CMD_EN_SEC_ACCL0, cpg->reg + SEC_ACCEL_CMD); |
| 275 | |
| 276 | /* |
| 277 | * XXX: add timer if the interrupt does not occur for some mystery |
| 278 | * reason |
| 279 | */ |
| 280 | } |
| 281 | |
| 282 | static void mv_crypto_algo_completion(void) |
| 283 | { |
Uri Simchoni | 3b61a90 | 2010-04-08 19:27:33 +0300 | [diff] [blame] | 284 | struct ablkcipher_request *req = ablkcipher_request_cast(cpg->cur_req); |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 285 | struct mv_req_ctx *req_ctx = ablkcipher_request_ctx(req); |
| 286 | |
Uri Simchoni | a58094a | 2010-04-08 19:30:19 +0300 | [diff] [blame] | 287 | sg_miter_stop(&cpg->p.src_sg_it); |
| 288 | sg_miter_stop(&cpg->p.dst_sg_it); |
| 289 | |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 290 | if (req_ctx->op != COP_AES_CBC) |
| 291 | return ; |
| 292 | |
| 293 | memcpy(req->info, cpg->sram + SRAM_DATA_IV_BUF, 16); |
| 294 | } |
| 295 | |
Uri Simchoni | 750052d | 2010-04-08 19:34:55 +0300 | [diff] [blame] | 296 | static void mv_process_hash_current(int first_block) |
| 297 | { |
| 298 | struct ahash_request *req = ahash_request_cast(cpg->cur_req); |
Phil Sutter | cc8d350 | 2011-05-05 15:29:03 +0200 | [diff] [blame] | 299 | const struct mv_tfm_hash_ctx *tfm_ctx = crypto_tfm_ctx(req->base.tfm); |
Uri Simchoni | 750052d | 2010-04-08 19:34:55 +0300 | [diff] [blame] | 300 | struct mv_req_hash_ctx *req_ctx = ahash_request_ctx(req); |
| 301 | struct req_progress *p = &cpg->p; |
| 302 | struct sec_accel_config op = { 0 }; |
| 303 | int is_last; |
| 304 | |
| 305 | switch (req_ctx->op) { |
| 306 | case COP_SHA1: |
| 307 | default: |
| 308 | op.config = CFG_OP_MAC_ONLY | CFG_MACM_SHA1; |
| 309 | break; |
| 310 | case COP_HMAC_SHA1: |
| 311 | op.config = CFG_OP_MAC_ONLY | CFG_MACM_HMAC_SHA1; |
Phil Sutter | cc8d350 | 2011-05-05 15:29:03 +0200 | [diff] [blame] | 312 | memcpy(cpg->sram + SRAM_HMAC_IV_IN, |
| 313 | tfm_ctx->ivs, sizeof(tfm_ctx->ivs)); |
Uri Simchoni | 750052d | 2010-04-08 19:34:55 +0300 | [diff] [blame] | 314 | break; |
| 315 | } |
| 316 | |
| 317 | op.mac_src_p = |
| 318 | MAC_SRC_DATA_P(SRAM_DATA_IN_START) | MAC_SRC_TOTAL_LEN((u32) |
| 319 | req_ctx-> |
| 320 | count); |
| 321 | |
| 322 | setup_data_in(); |
| 323 | |
| 324 | op.mac_digest = |
| 325 | MAC_DIGEST_P(SRAM_DIGEST_BUF) | MAC_FRAG_LEN(p->crypt_len); |
| 326 | op.mac_iv = |
| 327 | MAC_INNER_IV_P(SRAM_HMAC_IV_IN) | |
| 328 | MAC_OUTER_IV_P(SRAM_HMAC_IV_OUT); |
| 329 | |
| 330 | is_last = req_ctx->last_chunk |
| 331 | && (p->hw_processed_bytes + p->crypt_len >= p->hw_nbytes) |
| 332 | && (req_ctx->count <= MAX_HW_HASH_SIZE); |
| 333 | if (req_ctx->first_hash) { |
| 334 | if (is_last) |
| 335 | op.config |= CFG_NOT_FRAG; |
| 336 | else |
| 337 | op.config |= CFG_FIRST_FRAG; |
| 338 | |
| 339 | req_ctx->first_hash = 0; |
| 340 | } else { |
| 341 | if (is_last) |
| 342 | op.config |= CFG_LAST_FRAG; |
| 343 | else |
| 344 | op.config |= CFG_MID_FRAG; |
Phil Sutter | 8652348 | 2011-05-05 15:29:04 +0200 | [diff] [blame] | 345 | |
Phil Sutter | 2742528 | 2011-11-16 18:28:01 +0100 | [diff] [blame] | 346 | if (first_block) { |
| 347 | writel(req_ctx->state[0], cpg->reg + DIGEST_INITIAL_VAL_A); |
| 348 | writel(req_ctx->state[1], cpg->reg + DIGEST_INITIAL_VAL_B); |
| 349 | writel(req_ctx->state[2], cpg->reg + DIGEST_INITIAL_VAL_C); |
| 350 | writel(req_ctx->state[3], cpg->reg + DIGEST_INITIAL_VAL_D); |
| 351 | writel(req_ctx->state[4], cpg->reg + DIGEST_INITIAL_VAL_E); |
| 352 | } |
Uri Simchoni | 750052d | 2010-04-08 19:34:55 +0300 | [diff] [blame] | 353 | } |
| 354 | |
| 355 | memcpy(cpg->sram + SRAM_CONFIG, &op, sizeof(struct sec_accel_config)); |
| 356 | |
Uri Simchoni | 750052d | 2010-04-08 19:34:55 +0300 | [diff] [blame] | 357 | /* GO */ |
| 358 | writel(SEC_CMD_EN_SEC_ACCL0, cpg->reg + SEC_ACCEL_CMD); |
| 359 | |
| 360 | /* |
| 361 | * XXX: add timer if the interrupt does not occur for some mystery |
| 362 | * reason |
| 363 | */ |
| 364 | } |
| 365 | |
| 366 | static inline int mv_hash_import_sha1_ctx(const struct mv_req_hash_ctx *ctx, |
| 367 | struct shash_desc *desc) |
| 368 | { |
| 369 | int i; |
| 370 | struct sha1_state shash_state; |
| 371 | |
| 372 | shash_state.count = ctx->count + ctx->count_add; |
| 373 | for (i = 0; i < 5; i++) |
| 374 | shash_state.state[i] = ctx->state[i]; |
| 375 | memcpy(shash_state.buffer, ctx->buffer, sizeof(shash_state.buffer)); |
| 376 | return crypto_shash_import(desc, &shash_state); |
| 377 | } |
| 378 | |
| 379 | static int mv_hash_final_fallback(struct ahash_request *req) |
| 380 | { |
| 381 | const struct mv_tfm_hash_ctx *tfm_ctx = crypto_tfm_ctx(req->base.tfm); |
| 382 | struct mv_req_hash_ctx *req_ctx = ahash_request_ctx(req); |
| 383 | struct { |
| 384 | struct shash_desc shash; |
| 385 | char ctx[crypto_shash_descsize(tfm_ctx->fallback)]; |
| 386 | } desc; |
| 387 | int rc; |
| 388 | |
| 389 | desc.shash.tfm = tfm_ctx->fallback; |
| 390 | desc.shash.flags = CRYPTO_TFM_REQ_MAY_SLEEP; |
| 391 | if (unlikely(req_ctx->first_hash)) { |
| 392 | crypto_shash_init(&desc.shash); |
| 393 | crypto_shash_update(&desc.shash, req_ctx->buffer, |
| 394 | req_ctx->extra_bytes); |
| 395 | } else { |
| 396 | /* only SHA1 for now.... |
| 397 | */ |
| 398 | rc = mv_hash_import_sha1_ctx(req_ctx, &desc.shash); |
| 399 | if (rc) |
| 400 | goto out; |
| 401 | } |
| 402 | rc = crypto_shash_final(&desc.shash, req->result); |
| 403 | out: |
| 404 | return rc; |
| 405 | } |
| 406 | |
| 407 | static void mv_hash_algo_completion(void) |
| 408 | { |
| 409 | struct ahash_request *req = ahash_request_cast(cpg->cur_req); |
| 410 | struct mv_req_hash_ctx *ctx = ahash_request_ctx(req); |
| 411 | |
| 412 | if (ctx->extra_bytes) |
| 413 | copy_src_to_buf(&cpg->p, ctx->buffer, ctx->extra_bytes); |
| 414 | sg_miter_stop(&cpg->p.src_sg_it); |
| 415 | |
Uri Simchoni | 750052d | 2010-04-08 19:34:55 +0300 | [diff] [blame] | 416 | if (likely(ctx->last_chunk)) { |
| 417 | if (likely(ctx->count <= MAX_HW_HASH_SIZE)) { |
| 418 | memcpy(req->result, cpg->sram + SRAM_DIGEST_BUF, |
| 419 | crypto_ahash_digestsize(crypto_ahash_reqtfm |
| 420 | (req))); |
| 421 | } else |
| 422 | mv_hash_final_fallback(req); |
Phil Sutter | 7a1c6bc | 2011-05-05 15:29:01 +0200 | [diff] [blame] | 423 | } else { |
| 424 | ctx->state[0] = readl(cpg->reg + DIGEST_INITIAL_VAL_A); |
| 425 | ctx->state[1] = readl(cpg->reg + DIGEST_INITIAL_VAL_B); |
| 426 | ctx->state[2] = readl(cpg->reg + DIGEST_INITIAL_VAL_C); |
| 427 | ctx->state[3] = readl(cpg->reg + DIGEST_INITIAL_VAL_D); |
| 428 | ctx->state[4] = readl(cpg->reg + DIGEST_INITIAL_VAL_E); |
Uri Simchoni | 750052d | 2010-04-08 19:34:55 +0300 | [diff] [blame] | 429 | } |
| 430 | } |
| 431 | |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 432 | static void dequeue_complete_req(void) |
| 433 | { |
Uri Simchoni | 3b61a90 | 2010-04-08 19:27:33 +0300 | [diff] [blame] | 434 | struct crypto_async_request *req = cpg->cur_req; |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 435 | void *buf; |
| 436 | int ret; |
Uri Simchoni | 7a5f691 | 2010-04-08 19:29:16 +0300 | [diff] [blame] | 437 | cpg->p.hw_processed_bytes += cpg->p.crypt_len; |
Uri Simchoni | f0d03de | 2010-04-08 19:31:48 +0300 | [diff] [blame] | 438 | if (cpg->p.copy_back) { |
| 439 | int need_copy_len = cpg->p.crypt_len; |
| 440 | int sram_offset = 0; |
| 441 | do { |
| 442 | int dst_copy; |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 443 | |
Uri Simchoni | f0d03de | 2010-04-08 19:31:48 +0300 | [diff] [blame] | 444 | if (!cpg->p.sg_dst_left) { |
| 445 | ret = sg_miter_next(&cpg->p.dst_sg_it); |
| 446 | BUG_ON(!ret); |
| 447 | cpg->p.sg_dst_left = cpg->p.dst_sg_it.length; |
| 448 | cpg->p.dst_start = 0; |
| 449 | } |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 450 | |
Uri Simchoni | f0d03de | 2010-04-08 19:31:48 +0300 | [diff] [blame] | 451 | buf = cpg->p.dst_sg_it.addr; |
| 452 | buf += cpg->p.dst_start; |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 453 | |
Uri Simchoni | f0d03de | 2010-04-08 19:31:48 +0300 | [diff] [blame] | 454 | dst_copy = min(need_copy_len, cpg->p.sg_dst_left); |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 455 | |
Uri Simchoni | f0d03de | 2010-04-08 19:31:48 +0300 | [diff] [blame] | 456 | memcpy(buf, |
| 457 | cpg->sram + SRAM_DATA_OUT_START + sram_offset, |
| 458 | dst_copy); |
| 459 | sram_offset += dst_copy; |
| 460 | cpg->p.sg_dst_left -= dst_copy; |
| 461 | need_copy_len -= dst_copy; |
| 462 | cpg->p.dst_start += dst_copy; |
| 463 | } while (need_copy_len > 0); |
| 464 | } |
| 465 | |
Uri Simchoni | 0c5c6c4 | 2010-04-08 19:33:26 +0300 | [diff] [blame] | 466 | cpg->p.crypt_len = 0; |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 467 | |
| 468 | BUG_ON(cpg->eng_st != ENGINE_W_DEQUEUE); |
Uri Simchoni | 7a5f691 | 2010-04-08 19:29:16 +0300 | [diff] [blame] | 469 | if (cpg->p.hw_processed_bytes < cpg->p.hw_nbytes) { |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 470 | /* process next scatter list entry */ |
| 471 | cpg->eng_st = ENGINE_BUSY; |
Uri Simchoni | a58094a | 2010-04-08 19:30:19 +0300 | [diff] [blame] | 472 | cpg->p.process(0); |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 473 | } else { |
Uri Simchoni | a58094a | 2010-04-08 19:30:19 +0300 | [diff] [blame] | 474 | cpg->p.complete(); |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 475 | cpg->eng_st = ENGINE_IDLE; |
Uri Simchoni | 0328ac2 | 2010-04-08 19:25:37 +0300 | [diff] [blame] | 476 | local_bh_disable(); |
Uri Simchoni | 3b61a90 | 2010-04-08 19:27:33 +0300 | [diff] [blame] | 477 | req->complete(req, 0); |
Uri Simchoni | 0328ac2 | 2010-04-08 19:25:37 +0300 | [diff] [blame] | 478 | local_bh_enable(); |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 479 | } |
| 480 | } |
| 481 | |
| 482 | static int count_sgs(struct scatterlist *sl, unsigned int total_bytes) |
| 483 | { |
| 484 | int i = 0; |
Uri Simchoni | 15d4dd3 | 2010-04-08 19:27:02 +0300 | [diff] [blame] | 485 | size_t cur_len; |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 486 | |
Phil Sutter | 6ef8450 | 2011-05-05 15:29:06 +0200 | [diff] [blame] | 487 | while (sl) { |
Uri Simchoni | 15d4dd3 | 2010-04-08 19:27:02 +0300 | [diff] [blame] | 488 | cur_len = sl[i].length; |
| 489 | ++i; |
| 490 | if (total_bytes > cur_len) |
| 491 | total_bytes -= cur_len; |
| 492 | else |
| 493 | break; |
| 494 | } |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 495 | |
| 496 | return i; |
| 497 | } |
| 498 | |
Uri Simchoni | 750052d | 2010-04-08 19:34:55 +0300 | [diff] [blame] | 499 | static void mv_start_new_crypt_req(struct ablkcipher_request *req) |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 500 | { |
Uri Simchoni | 3b61a90 | 2010-04-08 19:27:33 +0300 | [diff] [blame] | 501 | struct req_progress *p = &cpg->p; |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 502 | int num_sgs; |
| 503 | |
Uri Simchoni | 3b61a90 | 2010-04-08 19:27:33 +0300 | [diff] [blame] | 504 | cpg->cur_req = &req->base; |
| 505 | memset(p, 0, sizeof(struct req_progress)); |
| 506 | p->hw_nbytes = req->nbytes; |
Uri Simchoni | a58094a | 2010-04-08 19:30:19 +0300 | [diff] [blame] | 507 | p->complete = mv_crypto_algo_completion; |
| 508 | p->process = mv_process_current_q; |
Uri Simchoni | f0d03de | 2010-04-08 19:31:48 +0300 | [diff] [blame] | 509 | p->copy_back = 1; |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 510 | |
| 511 | num_sgs = count_sgs(req->src, req->nbytes); |
Uri Simchoni | 3b61a90 | 2010-04-08 19:27:33 +0300 | [diff] [blame] | 512 | sg_miter_start(&p->src_sg_it, req->src, num_sgs, SG_MITER_FROM_SG); |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 513 | |
| 514 | num_sgs = count_sgs(req->dst, req->nbytes); |
Uri Simchoni | 3b61a90 | 2010-04-08 19:27:33 +0300 | [diff] [blame] | 515 | sg_miter_start(&p->dst_sg_it, req->dst, num_sgs, SG_MITER_TO_SG); |
| 516 | |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 517 | mv_process_current_q(1); |
| 518 | } |
| 519 | |
Uri Simchoni | 750052d | 2010-04-08 19:34:55 +0300 | [diff] [blame] | 520 | static void mv_start_new_hash_req(struct ahash_request *req) |
| 521 | { |
| 522 | struct req_progress *p = &cpg->p; |
| 523 | struct mv_req_hash_ctx *ctx = ahash_request_ctx(req); |
Uri Simchoni | 750052d | 2010-04-08 19:34:55 +0300 | [diff] [blame] | 524 | int num_sgs, hw_bytes, old_extra_bytes, rc; |
| 525 | cpg->cur_req = &req->base; |
| 526 | memset(p, 0, sizeof(struct req_progress)); |
| 527 | hw_bytes = req->nbytes + ctx->extra_bytes; |
| 528 | old_extra_bytes = ctx->extra_bytes; |
| 529 | |
Uri Simchoni | 750052d | 2010-04-08 19:34:55 +0300 | [diff] [blame] | 530 | ctx->extra_bytes = hw_bytes % SHA1_BLOCK_SIZE; |
| 531 | if (ctx->extra_bytes != 0 |
| 532 | && (!ctx->last_chunk || ctx->count > MAX_HW_HASH_SIZE)) |
| 533 | hw_bytes -= ctx->extra_bytes; |
| 534 | else |
| 535 | ctx->extra_bytes = 0; |
| 536 | |
| 537 | num_sgs = count_sgs(req->src, req->nbytes); |
| 538 | sg_miter_start(&p->src_sg_it, req->src, num_sgs, SG_MITER_FROM_SG); |
| 539 | |
| 540 | if (hw_bytes) { |
| 541 | p->hw_nbytes = hw_bytes; |
| 542 | p->complete = mv_hash_algo_completion; |
| 543 | p->process = mv_process_hash_current; |
| 544 | |
Phil Sutter | 7759995 | 2011-05-05 15:29:05 +0200 | [diff] [blame] | 545 | if (unlikely(old_extra_bytes)) { |
| 546 | memcpy(cpg->sram + SRAM_DATA_IN_START, ctx->buffer, |
| 547 | old_extra_bytes); |
| 548 | p->crypt_len = old_extra_bytes; |
| 549 | } |
| 550 | |
Uri Simchoni | 750052d | 2010-04-08 19:34:55 +0300 | [diff] [blame] | 551 | mv_process_hash_current(1); |
| 552 | } else { |
| 553 | copy_src_to_buf(p, ctx->buffer + old_extra_bytes, |
| 554 | ctx->extra_bytes - old_extra_bytes); |
| 555 | sg_miter_stop(&p->src_sg_it); |
| 556 | if (ctx->last_chunk) |
| 557 | rc = mv_hash_final_fallback(req); |
| 558 | else |
| 559 | rc = 0; |
| 560 | cpg->eng_st = ENGINE_IDLE; |
| 561 | local_bh_disable(); |
| 562 | req->base.complete(&req->base, rc); |
| 563 | local_bh_enable(); |
| 564 | } |
| 565 | } |
| 566 | |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 567 | static int queue_manag(void *data) |
| 568 | { |
| 569 | cpg->eng_st = ENGINE_IDLE; |
| 570 | do { |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 571 | struct crypto_async_request *async_req = NULL; |
| 572 | struct crypto_async_request *backlog; |
| 573 | |
| 574 | __set_current_state(TASK_INTERRUPTIBLE); |
| 575 | |
| 576 | if (cpg->eng_st == ENGINE_W_DEQUEUE) |
| 577 | dequeue_complete_req(); |
| 578 | |
| 579 | spin_lock_irq(&cpg->lock); |
| 580 | if (cpg->eng_st == ENGINE_IDLE) { |
| 581 | backlog = crypto_get_backlog(&cpg->queue); |
| 582 | async_req = crypto_dequeue_request(&cpg->queue); |
| 583 | if (async_req) { |
| 584 | BUG_ON(cpg->eng_st != ENGINE_IDLE); |
| 585 | cpg->eng_st = ENGINE_BUSY; |
| 586 | } |
| 587 | } |
| 588 | spin_unlock_irq(&cpg->lock); |
| 589 | |
| 590 | if (backlog) { |
| 591 | backlog->complete(backlog, -EINPROGRESS); |
| 592 | backlog = NULL; |
| 593 | } |
| 594 | |
| 595 | if (async_req) { |
Uri Simchoni | 750052d | 2010-04-08 19:34:55 +0300 | [diff] [blame] | 596 | if (async_req->tfm->__crt_alg->cra_type != |
| 597 | &crypto_ahash_type) { |
| 598 | struct ablkcipher_request *req = |
Phil Sutter | 042e9e7 | 2011-05-05 15:28:57 +0200 | [diff] [blame] | 599 | ablkcipher_request_cast(async_req); |
Uri Simchoni | 750052d | 2010-04-08 19:34:55 +0300 | [diff] [blame] | 600 | mv_start_new_crypt_req(req); |
| 601 | } else { |
| 602 | struct ahash_request *req = |
| 603 | ahash_request_cast(async_req); |
| 604 | mv_start_new_hash_req(req); |
| 605 | } |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 606 | async_req = NULL; |
| 607 | } |
| 608 | |
| 609 | schedule(); |
| 610 | |
| 611 | } while (!kthread_should_stop()); |
| 612 | return 0; |
| 613 | } |
| 614 | |
Uri Simchoni | 3b61a90 | 2010-04-08 19:27:33 +0300 | [diff] [blame] | 615 | static int mv_handle_req(struct crypto_async_request *req) |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 616 | { |
| 617 | unsigned long flags; |
| 618 | int ret; |
| 619 | |
| 620 | spin_lock_irqsave(&cpg->lock, flags); |
Uri Simchoni | 3b61a90 | 2010-04-08 19:27:33 +0300 | [diff] [blame] | 621 | ret = crypto_enqueue_request(&cpg->queue, req); |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 622 | spin_unlock_irqrestore(&cpg->lock, flags); |
| 623 | wake_up_process(cpg->queue_th); |
| 624 | return ret; |
| 625 | } |
| 626 | |
| 627 | static int mv_enc_aes_ecb(struct ablkcipher_request *req) |
| 628 | { |
| 629 | struct mv_req_ctx *req_ctx = ablkcipher_request_ctx(req); |
| 630 | |
| 631 | req_ctx->op = COP_AES_ECB; |
| 632 | req_ctx->decrypt = 0; |
| 633 | |
Uri Simchoni | 3b61a90 | 2010-04-08 19:27:33 +0300 | [diff] [blame] | 634 | return mv_handle_req(&req->base); |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 635 | } |
| 636 | |
| 637 | static int mv_dec_aes_ecb(struct ablkcipher_request *req) |
| 638 | { |
| 639 | struct mv_ctx *ctx = crypto_tfm_ctx(req->base.tfm); |
| 640 | struct mv_req_ctx *req_ctx = ablkcipher_request_ctx(req); |
| 641 | |
| 642 | req_ctx->op = COP_AES_ECB; |
| 643 | req_ctx->decrypt = 1; |
| 644 | |
| 645 | compute_aes_dec_key(ctx); |
Uri Simchoni | 3b61a90 | 2010-04-08 19:27:33 +0300 | [diff] [blame] | 646 | return mv_handle_req(&req->base); |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 647 | } |
| 648 | |
| 649 | static int mv_enc_aes_cbc(struct ablkcipher_request *req) |
| 650 | { |
| 651 | struct mv_req_ctx *req_ctx = ablkcipher_request_ctx(req); |
| 652 | |
| 653 | req_ctx->op = COP_AES_CBC; |
| 654 | req_ctx->decrypt = 0; |
| 655 | |
Uri Simchoni | 3b61a90 | 2010-04-08 19:27:33 +0300 | [diff] [blame] | 656 | return mv_handle_req(&req->base); |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 657 | } |
| 658 | |
| 659 | static int mv_dec_aes_cbc(struct ablkcipher_request *req) |
| 660 | { |
| 661 | struct mv_ctx *ctx = crypto_tfm_ctx(req->base.tfm); |
| 662 | struct mv_req_ctx *req_ctx = ablkcipher_request_ctx(req); |
| 663 | |
| 664 | req_ctx->op = COP_AES_CBC; |
| 665 | req_ctx->decrypt = 1; |
| 666 | |
| 667 | compute_aes_dec_key(ctx); |
Uri Simchoni | 3b61a90 | 2010-04-08 19:27:33 +0300 | [diff] [blame] | 668 | return mv_handle_req(&req->base); |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 669 | } |
| 670 | |
| 671 | static int mv_cra_init(struct crypto_tfm *tfm) |
| 672 | { |
| 673 | tfm->crt_ablkcipher.reqsize = sizeof(struct mv_req_ctx); |
| 674 | return 0; |
| 675 | } |
| 676 | |
Uri Simchoni | 750052d | 2010-04-08 19:34:55 +0300 | [diff] [blame] | 677 | static void mv_init_hash_req_ctx(struct mv_req_hash_ctx *ctx, int op, |
| 678 | int is_last, unsigned int req_len, |
| 679 | int count_add) |
| 680 | { |
| 681 | memset(ctx, 0, sizeof(*ctx)); |
| 682 | ctx->op = op; |
| 683 | ctx->count = req_len; |
| 684 | ctx->first_hash = 1; |
| 685 | ctx->last_chunk = is_last; |
| 686 | ctx->count_add = count_add; |
| 687 | } |
| 688 | |
| 689 | static void mv_update_hash_req_ctx(struct mv_req_hash_ctx *ctx, int is_last, |
| 690 | unsigned req_len) |
| 691 | { |
| 692 | ctx->last_chunk = is_last; |
| 693 | ctx->count += req_len; |
| 694 | } |
| 695 | |
| 696 | static int mv_hash_init(struct ahash_request *req) |
| 697 | { |
| 698 | const struct mv_tfm_hash_ctx *tfm_ctx = crypto_tfm_ctx(req->base.tfm); |
| 699 | mv_init_hash_req_ctx(ahash_request_ctx(req), tfm_ctx->op, 0, 0, |
| 700 | tfm_ctx->count_add); |
| 701 | return 0; |
| 702 | } |
| 703 | |
| 704 | static int mv_hash_update(struct ahash_request *req) |
| 705 | { |
| 706 | if (!req->nbytes) |
| 707 | return 0; |
| 708 | |
| 709 | mv_update_hash_req_ctx(ahash_request_ctx(req), 0, req->nbytes); |
| 710 | return mv_handle_req(&req->base); |
| 711 | } |
| 712 | |
| 713 | static int mv_hash_final(struct ahash_request *req) |
| 714 | { |
| 715 | struct mv_req_hash_ctx *ctx = ahash_request_ctx(req); |
Phil Sutter | 6ef8450 | 2011-05-05 15:29:06 +0200 | [diff] [blame] | 716 | |
Phil Sutter | f8f54e1 | 2012-02-27 12:17:04 +0100 | [diff] [blame] | 717 | ahash_request_set_crypt(req, NULL, req->result, 0); |
Uri Simchoni | 750052d | 2010-04-08 19:34:55 +0300 | [diff] [blame] | 718 | mv_update_hash_req_ctx(ctx, 1, 0); |
| 719 | return mv_handle_req(&req->base); |
| 720 | } |
| 721 | |
| 722 | static int mv_hash_finup(struct ahash_request *req) |
| 723 | { |
Uri Simchoni | 750052d | 2010-04-08 19:34:55 +0300 | [diff] [blame] | 724 | mv_update_hash_req_ctx(ahash_request_ctx(req), 1, req->nbytes); |
| 725 | return mv_handle_req(&req->base); |
| 726 | } |
| 727 | |
| 728 | static int mv_hash_digest(struct ahash_request *req) |
| 729 | { |
| 730 | const struct mv_tfm_hash_ctx *tfm_ctx = crypto_tfm_ctx(req->base.tfm); |
| 731 | mv_init_hash_req_ctx(ahash_request_ctx(req), tfm_ctx->op, 1, |
| 732 | req->nbytes, tfm_ctx->count_add); |
| 733 | return mv_handle_req(&req->base); |
| 734 | } |
| 735 | |
| 736 | static void mv_hash_init_ivs(struct mv_tfm_hash_ctx *ctx, const void *istate, |
| 737 | const void *ostate) |
| 738 | { |
| 739 | const struct sha1_state *isha1_state = istate, *osha1_state = ostate; |
| 740 | int i; |
| 741 | for (i = 0; i < 5; i++) { |
| 742 | ctx->ivs[i] = cpu_to_be32(isha1_state->state[i]); |
| 743 | ctx->ivs[i + 5] = cpu_to_be32(osha1_state->state[i]); |
| 744 | } |
| 745 | } |
| 746 | |
| 747 | static int mv_hash_setkey(struct crypto_ahash *tfm, const u8 * key, |
| 748 | unsigned int keylen) |
| 749 | { |
| 750 | int rc; |
| 751 | struct mv_tfm_hash_ctx *ctx = crypto_tfm_ctx(&tfm->base); |
| 752 | int bs, ds, ss; |
| 753 | |
| 754 | if (!ctx->base_hash) |
| 755 | return 0; |
| 756 | |
| 757 | rc = crypto_shash_setkey(ctx->fallback, key, keylen); |
| 758 | if (rc) |
| 759 | return rc; |
| 760 | |
| 761 | /* Can't see a way to extract the ipad/opad from the fallback tfm |
| 762 | so I'm basically copying code from the hmac module */ |
| 763 | bs = crypto_shash_blocksize(ctx->base_hash); |
| 764 | ds = crypto_shash_digestsize(ctx->base_hash); |
| 765 | ss = crypto_shash_statesize(ctx->base_hash); |
| 766 | |
| 767 | { |
| 768 | struct { |
| 769 | struct shash_desc shash; |
| 770 | char ctx[crypto_shash_descsize(ctx->base_hash)]; |
| 771 | } desc; |
| 772 | unsigned int i; |
| 773 | char ipad[ss]; |
| 774 | char opad[ss]; |
| 775 | |
| 776 | desc.shash.tfm = ctx->base_hash; |
| 777 | desc.shash.flags = crypto_shash_get_flags(ctx->base_hash) & |
| 778 | CRYPTO_TFM_REQ_MAY_SLEEP; |
| 779 | |
| 780 | if (keylen > bs) { |
| 781 | int err; |
| 782 | |
| 783 | err = |
| 784 | crypto_shash_digest(&desc.shash, key, keylen, ipad); |
| 785 | if (err) |
| 786 | return err; |
| 787 | |
| 788 | keylen = ds; |
| 789 | } else |
| 790 | memcpy(ipad, key, keylen); |
| 791 | |
| 792 | memset(ipad + keylen, 0, bs - keylen); |
| 793 | memcpy(opad, ipad, bs); |
| 794 | |
| 795 | for (i = 0; i < bs; i++) { |
| 796 | ipad[i] ^= 0x36; |
| 797 | opad[i] ^= 0x5c; |
| 798 | } |
| 799 | |
| 800 | rc = crypto_shash_init(&desc.shash) ? : |
| 801 | crypto_shash_update(&desc.shash, ipad, bs) ? : |
| 802 | crypto_shash_export(&desc.shash, ipad) ? : |
| 803 | crypto_shash_init(&desc.shash) ? : |
| 804 | crypto_shash_update(&desc.shash, opad, bs) ? : |
| 805 | crypto_shash_export(&desc.shash, opad); |
| 806 | |
| 807 | if (rc == 0) |
| 808 | mv_hash_init_ivs(ctx, ipad, opad); |
| 809 | |
| 810 | return rc; |
| 811 | } |
| 812 | } |
| 813 | |
| 814 | static int mv_cra_hash_init(struct crypto_tfm *tfm, const char *base_hash_name, |
| 815 | enum hash_op op, int count_add) |
| 816 | { |
| 817 | const char *fallback_driver_name = tfm->__crt_alg->cra_name; |
| 818 | struct mv_tfm_hash_ctx *ctx = crypto_tfm_ctx(tfm); |
| 819 | struct crypto_shash *fallback_tfm = NULL; |
| 820 | struct crypto_shash *base_hash = NULL; |
| 821 | int err = -ENOMEM; |
| 822 | |
| 823 | ctx->op = op; |
| 824 | ctx->count_add = count_add; |
| 825 | |
| 826 | /* Allocate a fallback and abort if it failed. */ |
| 827 | fallback_tfm = crypto_alloc_shash(fallback_driver_name, 0, |
| 828 | CRYPTO_ALG_NEED_FALLBACK); |
| 829 | if (IS_ERR(fallback_tfm)) { |
| 830 | printk(KERN_WARNING MV_CESA |
| 831 | "Fallback driver '%s' could not be loaded!\n", |
| 832 | fallback_driver_name); |
| 833 | err = PTR_ERR(fallback_tfm); |
| 834 | goto out; |
| 835 | } |
| 836 | ctx->fallback = fallback_tfm; |
| 837 | |
| 838 | if (base_hash_name) { |
| 839 | /* Allocate a hash to compute the ipad/opad of hmac. */ |
| 840 | base_hash = crypto_alloc_shash(base_hash_name, 0, |
| 841 | CRYPTO_ALG_NEED_FALLBACK); |
| 842 | if (IS_ERR(base_hash)) { |
| 843 | printk(KERN_WARNING MV_CESA |
| 844 | "Base driver '%s' could not be loaded!\n", |
| 845 | base_hash_name); |
Roel Kluin | 41f2977 | 2011-01-04 15:37:16 +1100 | [diff] [blame] | 846 | err = PTR_ERR(base_hash); |
Uri Simchoni | 750052d | 2010-04-08 19:34:55 +0300 | [diff] [blame] | 847 | goto err_bad_base; |
| 848 | } |
| 849 | } |
| 850 | ctx->base_hash = base_hash; |
| 851 | |
| 852 | crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm), |
| 853 | sizeof(struct mv_req_hash_ctx) + |
| 854 | crypto_shash_descsize(ctx->fallback)); |
| 855 | return 0; |
| 856 | err_bad_base: |
| 857 | crypto_free_shash(fallback_tfm); |
| 858 | out: |
| 859 | return err; |
| 860 | } |
| 861 | |
| 862 | static void mv_cra_hash_exit(struct crypto_tfm *tfm) |
| 863 | { |
| 864 | struct mv_tfm_hash_ctx *ctx = crypto_tfm_ctx(tfm); |
| 865 | |
| 866 | crypto_free_shash(ctx->fallback); |
| 867 | if (ctx->base_hash) |
| 868 | crypto_free_shash(ctx->base_hash); |
| 869 | } |
| 870 | |
| 871 | static int mv_cra_hash_sha1_init(struct crypto_tfm *tfm) |
| 872 | { |
| 873 | return mv_cra_hash_init(tfm, NULL, COP_SHA1, 0); |
| 874 | } |
| 875 | |
| 876 | static int mv_cra_hash_hmac_sha1_init(struct crypto_tfm *tfm) |
| 877 | { |
| 878 | return mv_cra_hash_init(tfm, "sha1", COP_HMAC_SHA1, SHA1_BLOCK_SIZE); |
| 879 | } |
| 880 | |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 881 | irqreturn_t crypto_int(int irq, void *priv) |
| 882 | { |
| 883 | u32 val; |
| 884 | |
| 885 | val = readl(cpg->reg + SEC_ACCEL_INT_STATUS); |
| 886 | if (!(val & SEC_INT_ACCEL0_DONE)) |
| 887 | return IRQ_NONE; |
| 888 | |
| 889 | val &= ~SEC_INT_ACCEL0_DONE; |
| 890 | writel(val, cpg->reg + FPGA_INT_STATUS); |
| 891 | writel(val, cpg->reg + SEC_ACCEL_INT_STATUS); |
| 892 | BUG_ON(cpg->eng_st != ENGINE_BUSY); |
| 893 | cpg->eng_st = ENGINE_W_DEQUEUE; |
| 894 | wake_up_process(cpg->queue_th); |
| 895 | return IRQ_HANDLED; |
| 896 | } |
| 897 | |
| 898 | struct crypto_alg mv_aes_alg_ecb = { |
| 899 | .cra_name = "ecb(aes)", |
| 900 | .cra_driver_name = "mv-ecb-aes", |
| 901 | .cra_priority = 300, |
Nikos Mavrogiannopoulos | d912bb7 | 2011-11-01 13:39:56 +0100 | [diff] [blame] | 902 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | |
| 903 | CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_ASYNC, |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 904 | .cra_blocksize = 16, |
| 905 | .cra_ctxsize = sizeof(struct mv_ctx), |
| 906 | .cra_alignmask = 0, |
| 907 | .cra_type = &crypto_ablkcipher_type, |
| 908 | .cra_module = THIS_MODULE, |
| 909 | .cra_init = mv_cra_init, |
| 910 | .cra_u = { |
| 911 | .ablkcipher = { |
| 912 | .min_keysize = AES_MIN_KEY_SIZE, |
| 913 | .max_keysize = AES_MAX_KEY_SIZE, |
| 914 | .setkey = mv_setkey_aes, |
| 915 | .encrypt = mv_enc_aes_ecb, |
| 916 | .decrypt = mv_dec_aes_ecb, |
| 917 | }, |
| 918 | }, |
| 919 | }; |
| 920 | |
| 921 | struct crypto_alg mv_aes_alg_cbc = { |
| 922 | .cra_name = "cbc(aes)", |
| 923 | .cra_driver_name = "mv-cbc-aes", |
| 924 | .cra_priority = 300, |
Nikos Mavrogiannopoulos | d912bb7 | 2011-11-01 13:39:56 +0100 | [diff] [blame] | 925 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | |
| 926 | CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_ASYNC, |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 927 | .cra_blocksize = AES_BLOCK_SIZE, |
| 928 | .cra_ctxsize = sizeof(struct mv_ctx), |
| 929 | .cra_alignmask = 0, |
| 930 | .cra_type = &crypto_ablkcipher_type, |
| 931 | .cra_module = THIS_MODULE, |
| 932 | .cra_init = mv_cra_init, |
| 933 | .cra_u = { |
| 934 | .ablkcipher = { |
| 935 | .ivsize = AES_BLOCK_SIZE, |
| 936 | .min_keysize = AES_MIN_KEY_SIZE, |
| 937 | .max_keysize = AES_MAX_KEY_SIZE, |
| 938 | .setkey = mv_setkey_aes, |
| 939 | .encrypt = mv_enc_aes_cbc, |
| 940 | .decrypt = mv_dec_aes_cbc, |
| 941 | }, |
| 942 | }, |
| 943 | }; |
| 944 | |
Uri Simchoni | 750052d | 2010-04-08 19:34:55 +0300 | [diff] [blame] | 945 | struct ahash_alg mv_sha1_alg = { |
| 946 | .init = mv_hash_init, |
| 947 | .update = mv_hash_update, |
| 948 | .final = mv_hash_final, |
| 949 | .finup = mv_hash_finup, |
| 950 | .digest = mv_hash_digest, |
| 951 | .halg = { |
| 952 | .digestsize = SHA1_DIGEST_SIZE, |
| 953 | .base = { |
| 954 | .cra_name = "sha1", |
| 955 | .cra_driver_name = "mv-sha1", |
| 956 | .cra_priority = 300, |
| 957 | .cra_flags = |
Nikos Mavrogiannopoulos | d912bb7 | 2011-11-01 13:39:56 +0100 | [diff] [blame] | 958 | CRYPTO_ALG_ASYNC | CRYPTO_ALG_KERN_DRIVER_ONLY | |
| 959 | CRYPTO_ALG_NEED_FALLBACK, |
Uri Simchoni | 750052d | 2010-04-08 19:34:55 +0300 | [diff] [blame] | 960 | .cra_blocksize = SHA1_BLOCK_SIZE, |
| 961 | .cra_ctxsize = sizeof(struct mv_tfm_hash_ctx), |
| 962 | .cra_init = mv_cra_hash_sha1_init, |
| 963 | .cra_exit = mv_cra_hash_exit, |
| 964 | .cra_module = THIS_MODULE, |
| 965 | } |
| 966 | } |
| 967 | }; |
| 968 | |
| 969 | struct ahash_alg mv_hmac_sha1_alg = { |
| 970 | .init = mv_hash_init, |
| 971 | .update = mv_hash_update, |
| 972 | .final = mv_hash_final, |
| 973 | .finup = mv_hash_finup, |
| 974 | .digest = mv_hash_digest, |
| 975 | .setkey = mv_hash_setkey, |
| 976 | .halg = { |
| 977 | .digestsize = SHA1_DIGEST_SIZE, |
| 978 | .base = { |
| 979 | .cra_name = "hmac(sha1)", |
| 980 | .cra_driver_name = "mv-hmac-sha1", |
| 981 | .cra_priority = 300, |
| 982 | .cra_flags = |
Nikos Mavrogiannopoulos | d912bb7 | 2011-11-01 13:39:56 +0100 | [diff] [blame] | 983 | CRYPTO_ALG_ASYNC | CRYPTO_ALG_KERN_DRIVER_ONLY | |
| 984 | CRYPTO_ALG_NEED_FALLBACK, |
Uri Simchoni | 750052d | 2010-04-08 19:34:55 +0300 | [diff] [blame] | 985 | .cra_blocksize = SHA1_BLOCK_SIZE, |
| 986 | .cra_ctxsize = sizeof(struct mv_tfm_hash_ctx), |
| 987 | .cra_init = mv_cra_hash_hmac_sha1_init, |
| 988 | .cra_exit = mv_cra_hash_exit, |
| 989 | .cra_module = THIS_MODULE, |
| 990 | } |
| 991 | } |
| 992 | }; |
| 993 | |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 994 | static int mv_probe(struct platform_device *pdev) |
| 995 | { |
| 996 | struct crypto_priv *cp; |
| 997 | struct resource *res; |
| 998 | int irq; |
| 999 | int ret; |
| 1000 | |
| 1001 | if (cpg) { |
Uri Simchoni | 750052d | 2010-04-08 19:34:55 +0300 | [diff] [blame] | 1002 | printk(KERN_ERR MV_CESA "Second crypto dev?\n"); |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 1003 | return -EEXIST; |
| 1004 | } |
| 1005 | |
| 1006 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs"); |
| 1007 | if (!res) |
| 1008 | return -ENXIO; |
| 1009 | |
| 1010 | cp = kzalloc(sizeof(*cp), GFP_KERNEL); |
| 1011 | if (!cp) |
| 1012 | return -ENOMEM; |
| 1013 | |
| 1014 | spin_lock_init(&cp->lock); |
| 1015 | crypto_init_queue(&cp->queue, 50); |
Tobias Klauser | 5bdd5de | 2010-05-14 14:58:05 +1000 | [diff] [blame] | 1016 | cp->reg = ioremap(res->start, resource_size(res)); |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 1017 | if (!cp->reg) { |
| 1018 | ret = -ENOMEM; |
| 1019 | goto err; |
| 1020 | } |
| 1021 | |
| 1022 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sram"); |
| 1023 | if (!res) { |
| 1024 | ret = -ENXIO; |
| 1025 | goto err_unmap_reg; |
| 1026 | } |
Tobias Klauser | 5bdd5de | 2010-05-14 14:58:05 +1000 | [diff] [blame] | 1027 | cp->sram_size = resource_size(res); |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 1028 | cp->max_req_size = cp->sram_size - SRAM_CFG_SPACE; |
| 1029 | cp->sram = ioremap(res->start, cp->sram_size); |
| 1030 | if (!cp->sram) { |
| 1031 | ret = -ENOMEM; |
| 1032 | goto err_unmap_reg; |
| 1033 | } |
| 1034 | |
| 1035 | irq = platform_get_irq(pdev, 0); |
| 1036 | if (irq < 0 || irq == NO_IRQ) { |
| 1037 | ret = irq; |
| 1038 | goto err_unmap_sram; |
| 1039 | } |
| 1040 | cp->irq = irq; |
| 1041 | |
| 1042 | platform_set_drvdata(pdev, cp); |
| 1043 | cpg = cp; |
| 1044 | |
| 1045 | cp->queue_th = kthread_run(queue_manag, cp, "mv_crypto"); |
| 1046 | if (IS_ERR(cp->queue_th)) { |
| 1047 | ret = PTR_ERR(cp->queue_th); |
Dan Carpenter | 7cc2835 | 2010-05-26 10:45:22 +1000 | [diff] [blame] | 1048 | goto err_unmap_sram; |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 1049 | } |
| 1050 | |
| 1051 | ret = request_irq(irq, crypto_int, IRQF_DISABLED, dev_name(&pdev->dev), |
| 1052 | cp); |
| 1053 | if (ret) |
Dan Carpenter | 7cc2835 | 2010-05-26 10:45:22 +1000 | [diff] [blame] | 1054 | goto err_thread; |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 1055 | |
| 1056 | writel(SEC_INT_ACCEL0_DONE, cpg->reg + SEC_ACCEL_INT_MASK); |
| 1057 | writel(SEC_CFG_STOP_DIG_ERR, cpg->reg + SEC_ACCEL_CFG); |
Phil Sutter | 99db3ea | 2011-05-05 15:28:58 +0200 | [diff] [blame] | 1058 | writel(SRAM_CONFIG, cpg->reg + SEC_ACCEL_DESC_P0); |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 1059 | |
| 1060 | ret = crypto_register_alg(&mv_aes_alg_ecb); |
Phil Sutter | 2a025f5 | 2011-05-05 15:29:00 +0200 | [diff] [blame] | 1061 | if (ret) { |
| 1062 | printk(KERN_WARNING MV_CESA |
| 1063 | "Could not register aes-ecb driver\n"); |
Dan Carpenter | 7cc2835 | 2010-05-26 10:45:22 +1000 | [diff] [blame] | 1064 | goto err_irq; |
Phil Sutter | 2a025f5 | 2011-05-05 15:29:00 +0200 | [diff] [blame] | 1065 | } |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 1066 | |
| 1067 | ret = crypto_register_alg(&mv_aes_alg_cbc); |
Phil Sutter | 2a025f5 | 2011-05-05 15:29:00 +0200 | [diff] [blame] | 1068 | if (ret) { |
| 1069 | printk(KERN_WARNING MV_CESA |
| 1070 | "Could not register aes-cbc driver\n"); |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 1071 | goto err_unreg_ecb; |
Phil Sutter | 2a025f5 | 2011-05-05 15:29:00 +0200 | [diff] [blame] | 1072 | } |
Uri Simchoni | 750052d | 2010-04-08 19:34:55 +0300 | [diff] [blame] | 1073 | |
| 1074 | ret = crypto_register_ahash(&mv_sha1_alg); |
| 1075 | if (ret == 0) |
| 1076 | cpg->has_sha1 = 1; |
| 1077 | else |
| 1078 | printk(KERN_WARNING MV_CESA "Could not register sha1 driver\n"); |
| 1079 | |
| 1080 | ret = crypto_register_ahash(&mv_hmac_sha1_alg); |
| 1081 | if (ret == 0) { |
| 1082 | cpg->has_hmac_sha1 = 1; |
| 1083 | } else { |
| 1084 | printk(KERN_WARNING MV_CESA |
| 1085 | "Could not register hmac-sha1 driver\n"); |
| 1086 | } |
| 1087 | |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 1088 | return 0; |
| 1089 | err_unreg_ecb: |
| 1090 | crypto_unregister_alg(&mv_aes_alg_ecb); |
Dan Carpenter | 7cc2835 | 2010-05-26 10:45:22 +1000 | [diff] [blame] | 1091 | err_irq: |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 1092 | free_irq(irq, cp); |
Dan Carpenter | 7cc2835 | 2010-05-26 10:45:22 +1000 | [diff] [blame] | 1093 | err_thread: |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 1094 | kthread_stop(cp->queue_th); |
| 1095 | err_unmap_sram: |
| 1096 | iounmap(cp->sram); |
| 1097 | err_unmap_reg: |
| 1098 | iounmap(cp->reg); |
| 1099 | err: |
| 1100 | kfree(cp); |
| 1101 | cpg = NULL; |
| 1102 | platform_set_drvdata(pdev, NULL); |
| 1103 | return ret; |
| 1104 | } |
| 1105 | |
| 1106 | static int mv_remove(struct platform_device *pdev) |
| 1107 | { |
| 1108 | struct crypto_priv *cp = platform_get_drvdata(pdev); |
| 1109 | |
| 1110 | crypto_unregister_alg(&mv_aes_alg_ecb); |
| 1111 | crypto_unregister_alg(&mv_aes_alg_cbc); |
Uri Simchoni | 750052d | 2010-04-08 19:34:55 +0300 | [diff] [blame] | 1112 | if (cp->has_sha1) |
| 1113 | crypto_unregister_ahash(&mv_sha1_alg); |
| 1114 | if (cp->has_hmac_sha1) |
| 1115 | crypto_unregister_ahash(&mv_hmac_sha1_alg); |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 1116 | kthread_stop(cp->queue_th); |
| 1117 | free_irq(cp->irq, cp); |
| 1118 | memset(cp->sram, 0, cp->sram_size); |
| 1119 | iounmap(cp->sram); |
| 1120 | iounmap(cp->reg); |
| 1121 | kfree(cp); |
| 1122 | cpg = NULL; |
| 1123 | return 0; |
| 1124 | } |
| 1125 | |
| 1126 | static struct platform_driver marvell_crypto = { |
| 1127 | .probe = mv_probe, |
| 1128 | .remove = mv_remove, |
| 1129 | .driver = { |
| 1130 | .owner = THIS_MODULE, |
| 1131 | .name = "mv_crypto", |
| 1132 | }, |
| 1133 | }; |
| 1134 | MODULE_ALIAS("platform:mv_crypto"); |
| 1135 | |
Axel Lin | 741e8c2 | 2011-11-26 21:26:19 +0800 | [diff] [blame] | 1136 | module_platform_driver(marvell_crypto); |
Sebastian Andrzej Siewior | 85a7f0a | 2009-08-10 12:50:03 +1000 | [diff] [blame] | 1137 | |
| 1138 | MODULE_AUTHOR("Sebastian Andrzej Siewior <sebastian@breakpoint.cc>"); |
| 1139 | MODULE_DESCRIPTION("Support for Marvell's cryptographic engine"); |
| 1140 | MODULE_LICENSE("GPL"); |