Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 1 | /* |
| 2 | * AMD Cryptographic Coprocessor (CCP) driver |
| 3 | * |
| 4 | * Copyright (C) 2013 Advanced Micro Devices, Inc. |
| 5 | * |
| 6 | * Author: Tom Lendacky <thomas.lendacky@amd.com> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/kernel.h> |
| 15 | #include <linux/pci.h> |
| 16 | #include <linux/pci_ids.h> |
| 17 | #include <linux/kthread.h> |
| 18 | #include <linux/sched.h> |
| 19 | #include <linux/interrupt.h> |
| 20 | #include <linux/spinlock.h> |
| 21 | #include <linux/mutex.h> |
| 22 | #include <linux/delay.h> |
| 23 | #include <linux/ccp.h> |
| 24 | #include <linux/scatterlist.h> |
| 25 | #include <crypto/scatterwalk.h> |
Tom Lendacky | c11baa0 | 2014-01-24 16:18:02 -0600 | [diff] [blame] | 26 | #include <crypto/sha.h> |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 27 | |
| 28 | #include "ccp-dev.h" |
| 29 | |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 30 | enum ccp_memtype { |
| 31 | CCP_MEMTYPE_SYSTEM = 0, |
| 32 | CCP_MEMTYPE_KSB, |
| 33 | CCP_MEMTYPE_LOCAL, |
| 34 | CCP_MEMTYPE__LAST, |
| 35 | }; |
| 36 | |
| 37 | struct ccp_dma_info { |
| 38 | dma_addr_t address; |
| 39 | unsigned int offset; |
| 40 | unsigned int length; |
| 41 | enum dma_data_direction dir; |
| 42 | }; |
| 43 | |
| 44 | struct ccp_dm_workarea { |
| 45 | struct device *dev; |
| 46 | struct dma_pool *dma_pool; |
| 47 | unsigned int length; |
| 48 | |
| 49 | u8 *address; |
| 50 | struct ccp_dma_info dma; |
| 51 | }; |
| 52 | |
| 53 | struct ccp_sg_workarea { |
| 54 | struct scatterlist *sg; |
Tom Lendacky | fb43f69 | 2015-06-01 11:15:53 -0500 | [diff] [blame] | 55 | int nents; |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 56 | |
| 57 | struct scatterlist *dma_sg; |
| 58 | struct device *dma_dev; |
| 59 | unsigned int dma_count; |
| 60 | enum dma_data_direction dma_dir; |
| 61 | |
Tom Lendacky | 81a59f0 | 2014-01-06 13:34:17 -0600 | [diff] [blame] | 62 | unsigned int sg_used; |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 63 | |
Tom Lendacky | 81a59f0 | 2014-01-06 13:34:17 -0600 | [diff] [blame] | 64 | u64 bytes_left; |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 65 | }; |
| 66 | |
| 67 | struct ccp_data { |
| 68 | struct ccp_sg_workarea sg_wa; |
| 69 | struct ccp_dm_workarea dm_wa; |
| 70 | }; |
| 71 | |
| 72 | struct ccp_mem { |
| 73 | enum ccp_memtype type; |
| 74 | union { |
| 75 | struct ccp_dma_info dma; |
| 76 | u32 ksb; |
| 77 | } u; |
| 78 | }; |
| 79 | |
| 80 | struct ccp_aes_op { |
| 81 | enum ccp_aes_type type; |
| 82 | enum ccp_aes_mode mode; |
| 83 | enum ccp_aes_action action; |
| 84 | }; |
| 85 | |
| 86 | struct ccp_xts_aes_op { |
| 87 | enum ccp_aes_action action; |
| 88 | enum ccp_xts_aes_unit_size unit_size; |
| 89 | }; |
| 90 | |
| 91 | struct ccp_sha_op { |
| 92 | enum ccp_sha_type type; |
| 93 | u64 msg_bits; |
| 94 | }; |
| 95 | |
| 96 | struct ccp_rsa_op { |
| 97 | u32 mod_size; |
| 98 | u32 input_len; |
| 99 | }; |
| 100 | |
| 101 | struct ccp_passthru_op { |
| 102 | enum ccp_passthru_bitwise bit_mod; |
| 103 | enum ccp_passthru_byteswap byte_swap; |
| 104 | }; |
| 105 | |
| 106 | struct ccp_ecc_op { |
| 107 | enum ccp_ecc_function function; |
| 108 | }; |
| 109 | |
| 110 | struct ccp_op { |
| 111 | struct ccp_cmd_queue *cmd_q; |
| 112 | |
| 113 | u32 jobid; |
| 114 | u32 ioc; |
| 115 | u32 soc; |
| 116 | u32 ksb_key; |
| 117 | u32 ksb_ctx; |
| 118 | u32 init; |
| 119 | u32 eom; |
| 120 | |
| 121 | struct ccp_mem src; |
| 122 | struct ccp_mem dst; |
| 123 | |
| 124 | union { |
| 125 | struct ccp_aes_op aes; |
| 126 | struct ccp_xts_aes_op xts; |
| 127 | struct ccp_sha_op sha; |
| 128 | struct ccp_rsa_op rsa; |
| 129 | struct ccp_passthru_op passthru; |
| 130 | struct ccp_ecc_op ecc; |
| 131 | } u; |
| 132 | }; |
| 133 | |
Tom Lendacky | c11baa0 | 2014-01-24 16:18:02 -0600 | [diff] [blame] | 134 | /* SHA initial context values */ |
| 135 | static const __be32 ccp_sha1_init[CCP_SHA_CTXSIZE / sizeof(__be32)] = { |
| 136 | cpu_to_be32(SHA1_H0), cpu_to_be32(SHA1_H1), |
| 137 | cpu_to_be32(SHA1_H2), cpu_to_be32(SHA1_H3), |
| 138 | cpu_to_be32(SHA1_H4), 0, 0, 0, |
| 139 | }; |
| 140 | |
| 141 | static const __be32 ccp_sha224_init[CCP_SHA_CTXSIZE / sizeof(__be32)] = { |
| 142 | cpu_to_be32(SHA224_H0), cpu_to_be32(SHA224_H1), |
| 143 | cpu_to_be32(SHA224_H2), cpu_to_be32(SHA224_H3), |
| 144 | cpu_to_be32(SHA224_H4), cpu_to_be32(SHA224_H5), |
| 145 | cpu_to_be32(SHA224_H6), cpu_to_be32(SHA224_H7), |
| 146 | }; |
| 147 | |
| 148 | static const __be32 ccp_sha256_init[CCP_SHA_CTXSIZE / sizeof(__be32)] = { |
| 149 | cpu_to_be32(SHA256_H0), cpu_to_be32(SHA256_H1), |
| 150 | cpu_to_be32(SHA256_H2), cpu_to_be32(SHA256_H3), |
| 151 | cpu_to_be32(SHA256_H4), cpu_to_be32(SHA256_H5), |
| 152 | cpu_to_be32(SHA256_H6), cpu_to_be32(SHA256_H7), |
| 153 | }; |
| 154 | |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 155 | static u32 ccp_addr_lo(struct ccp_dma_info *info) |
| 156 | { |
| 157 | return lower_32_bits(info->address + info->offset); |
| 158 | } |
| 159 | |
| 160 | static u32 ccp_addr_hi(struct ccp_dma_info *info) |
| 161 | { |
| 162 | return upper_32_bits(info->address + info->offset) & 0x0000ffff; |
| 163 | } |
| 164 | |
| 165 | static int ccp_do_cmd(struct ccp_op *op, u32 *cr, unsigned int cr_count) |
| 166 | { |
| 167 | struct ccp_cmd_queue *cmd_q = op->cmd_q; |
| 168 | struct ccp_device *ccp = cmd_q->ccp; |
| 169 | void __iomem *cr_addr; |
| 170 | u32 cr0, cmd; |
| 171 | unsigned int i; |
| 172 | int ret = 0; |
| 173 | |
| 174 | /* We could read a status register to see how many free slots |
| 175 | * are actually available, but reading that register resets it |
| 176 | * and you could lose some error information. |
| 177 | */ |
| 178 | cmd_q->free_slots--; |
| 179 | |
| 180 | cr0 = (cmd_q->id << REQ0_CMD_Q_SHIFT) |
| 181 | | (op->jobid << REQ0_JOBID_SHIFT) |
| 182 | | REQ0_WAIT_FOR_WRITE; |
| 183 | |
| 184 | if (op->soc) |
| 185 | cr0 |= REQ0_STOP_ON_COMPLETE |
| 186 | | REQ0_INT_ON_COMPLETE; |
| 187 | |
| 188 | if (op->ioc || !cmd_q->free_slots) |
| 189 | cr0 |= REQ0_INT_ON_COMPLETE; |
| 190 | |
| 191 | /* Start at CMD_REQ1 */ |
| 192 | cr_addr = ccp->io_regs + CMD_REQ0 + CMD_REQ_INCR; |
| 193 | |
| 194 | mutex_lock(&ccp->req_mutex); |
| 195 | |
| 196 | /* Write CMD_REQ1 through CMD_REQx first */ |
| 197 | for (i = 0; i < cr_count; i++, cr_addr += CMD_REQ_INCR) |
| 198 | iowrite32(*(cr + i), cr_addr); |
| 199 | |
| 200 | /* Tell the CCP to start */ |
| 201 | wmb(); |
| 202 | iowrite32(cr0, ccp->io_regs + CMD_REQ0); |
| 203 | |
| 204 | mutex_unlock(&ccp->req_mutex); |
| 205 | |
| 206 | if (cr0 & REQ0_INT_ON_COMPLETE) { |
| 207 | /* Wait for the job to complete */ |
| 208 | ret = wait_event_interruptible(cmd_q->int_queue, |
| 209 | cmd_q->int_rcvd); |
| 210 | if (ret || cmd_q->cmd_error) { |
| 211 | /* On error delete all related jobs from the queue */ |
| 212 | cmd = (cmd_q->id << DEL_Q_ID_SHIFT) |
| 213 | | op->jobid; |
| 214 | |
| 215 | iowrite32(cmd, ccp->io_regs + DEL_CMD_Q_JOB); |
| 216 | |
| 217 | if (!ret) |
| 218 | ret = -EIO; |
| 219 | } else if (op->soc) { |
| 220 | /* Delete just head job from the queue on SoC */ |
| 221 | cmd = DEL_Q_ACTIVE |
| 222 | | (cmd_q->id << DEL_Q_ID_SHIFT) |
| 223 | | op->jobid; |
| 224 | |
| 225 | iowrite32(cmd, ccp->io_regs + DEL_CMD_Q_JOB); |
| 226 | } |
| 227 | |
| 228 | cmd_q->free_slots = CMD_Q_DEPTH(cmd_q->q_status); |
| 229 | |
| 230 | cmd_q->int_rcvd = 0; |
| 231 | } |
| 232 | |
| 233 | return ret; |
| 234 | } |
| 235 | |
| 236 | static int ccp_perform_aes(struct ccp_op *op) |
| 237 | { |
| 238 | u32 cr[6]; |
| 239 | |
| 240 | /* Fill out the register contents for REQ1 through REQ6 */ |
| 241 | cr[0] = (CCP_ENGINE_AES << REQ1_ENGINE_SHIFT) |
| 242 | | (op->u.aes.type << REQ1_AES_TYPE_SHIFT) |
| 243 | | (op->u.aes.mode << REQ1_AES_MODE_SHIFT) |
| 244 | | (op->u.aes.action << REQ1_AES_ACTION_SHIFT) |
| 245 | | (op->ksb_key << REQ1_KEY_KSB_SHIFT); |
| 246 | cr[1] = op->src.u.dma.length - 1; |
| 247 | cr[2] = ccp_addr_lo(&op->src.u.dma); |
| 248 | cr[3] = (op->ksb_ctx << REQ4_KSB_SHIFT) |
| 249 | | (CCP_MEMTYPE_SYSTEM << REQ4_MEMTYPE_SHIFT) |
| 250 | | ccp_addr_hi(&op->src.u.dma); |
| 251 | cr[4] = ccp_addr_lo(&op->dst.u.dma); |
| 252 | cr[5] = (CCP_MEMTYPE_SYSTEM << REQ6_MEMTYPE_SHIFT) |
| 253 | | ccp_addr_hi(&op->dst.u.dma); |
| 254 | |
| 255 | if (op->u.aes.mode == CCP_AES_MODE_CFB) |
| 256 | cr[0] |= ((0x7f) << REQ1_AES_CFB_SIZE_SHIFT); |
| 257 | |
| 258 | if (op->eom) |
| 259 | cr[0] |= REQ1_EOM; |
| 260 | |
| 261 | if (op->init) |
| 262 | cr[0] |= REQ1_INIT; |
| 263 | |
| 264 | return ccp_do_cmd(op, cr, ARRAY_SIZE(cr)); |
| 265 | } |
| 266 | |
| 267 | static int ccp_perform_xts_aes(struct ccp_op *op) |
| 268 | { |
| 269 | u32 cr[6]; |
| 270 | |
| 271 | /* Fill out the register contents for REQ1 through REQ6 */ |
| 272 | cr[0] = (CCP_ENGINE_XTS_AES_128 << REQ1_ENGINE_SHIFT) |
| 273 | | (op->u.xts.action << REQ1_AES_ACTION_SHIFT) |
| 274 | | (op->u.xts.unit_size << REQ1_XTS_AES_SIZE_SHIFT) |
| 275 | | (op->ksb_key << REQ1_KEY_KSB_SHIFT); |
| 276 | cr[1] = op->src.u.dma.length - 1; |
| 277 | cr[2] = ccp_addr_lo(&op->src.u.dma); |
| 278 | cr[3] = (op->ksb_ctx << REQ4_KSB_SHIFT) |
| 279 | | (CCP_MEMTYPE_SYSTEM << REQ4_MEMTYPE_SHIFT) |
| 280 | | ccp_addr_hi(&op->src.u.dma); |
| 281 | cr[4] = ccp_addr_lo(&op->dst.u.dma); |
| 282 | cr[5] = (CCP_MEMTYPE_SYSTEM << REQ6_MEMTYPE_SHIFT) |
| 283 | | ccp_addr_hi(&op->dst.u.dma); |
| 284 | |
| 285 | if (op->eom) |
| 286 | cr[0] |= REQ1_EOM; |
| 287 | |
| 288 | if (op->init) |
| 289 | cr[0] |= REQ1_INIT; |
| 290 | |
| 291 | return ccp_do_cmd(op, cr, ARRAY_SIZE(cr)); |
| 292 | } |
| 293 | |
| 294 | static int ccp_perform_sha(struct ccp_op *op) |
| 295 | { |
| 296 | u32 cr[6]; |
| 297 | |
| 298 | /* Fill out the register contents for REQ1 through REQ6 */ |
| 299 | cr[0] = (CCP_ENGINE_SHA << REQ1_ENGINE_SHIFT) |
| 300 | | (op->u.sha.type << REQ1_SHA_TYPE_SHIFT) |
| 301 | | REQ1_INIT; |
| 302 | cr[1] = op->src.u.dma.length - 1; |
| 303 | cr[2] = ccp_addr_lo(&op->src.u.dma); |
| 304 | cr[3] = (op->ksb_ctx << REQ4_KSB_SHIFT) |
| 305 | | (CCP_MEMTYPE_SYSTEM << REQ4_MEMTYPE_SHIFT) |
| 306 | | ccp_addr_hi(&op->src.u.dma); |
| 307 | |
| 308 | if (op->eom) { |
| 309 | cr[0] |= REQ1_EOM; |
| 310 | cr[4] = lower_32_bits(op->u.sha.msg_bits); |
| 311 | cr[5] = upper_32_bits(op->u.sha.msg_bits); |
| 312 | } else { |
| 313 | cr[4] = 0; |
| 314 | cr[5] = 0; |
| 315 | } |
| 316 | |
| 317 | return ccp_do_cmd(op, cr, ARRAY_SIZE(cr)); |
| 318 | } |
| 319 | |
| 320 | static int ccp_perform_rsa(struct ccp_op *op) |
| 321 | { |
| 322 | u32 cr[6]; |
| 323 | |
| 324 | /* Fill out the register contents for REQ1 through REQ6 */ |
| 325 | cr[0] = (CCP_ENGINE_RSA << REQ1_ENGINE_SHIFT) |
| 326 | | (op->u.rsa.mod_size << REQ1_RSA_MOD_SIZE_SHIFT) |
| 327 | | (op->ksb_key << REQ1_KEY_KSB_SHIFT) |
| 328 | | REQ1_EOM; |
| 329 | cr[1] = op->u.rsa.input_len - 1; |
| 330 | cr[2] = ccp_addr_lo(&op->src.u.dma); |
| 331 | cr[3] = (op->ksb_ctx << REQ4_KSB_SHIFT) |
| 332 | | (CCP_MEMTYPE_SYSTEM << REQ4_MEMTYPE_SHIFT) |
| 333 | | ccp_addr_hi(&op->src.u.dma); |
| 334 | cr[4] = ccp_addr_lo(&op->dst.u.dma); |
| 335 | cr[5] = (CCP_MEMTYPE_SYSTEM << REQ6_MEMTYPE_SHIFT) |
| 336 | | ccp_addr_hi(&op->dst.u.dma); |
| 337 | |
| 338 | return ccp_do_cmd(op, cr, ARRAY_SIZE(cr)); |
| 339 | } |
| 340 | |
| 341 | static int ccp_perform_passthru(struct ccp_op *op) |
| 342 | { |
| 343 | u32 cr[6]; |
| 344 | |
| 345 | /* Fill out the register contents for REQ1 through REQ6 */ |
| 346 | cr[0] = (CCP_ENGINE_PASSTHRU << REQ1_ENGINE_SHIFT) |
| 347 | | (op->u.passthru.bit_mod << REQ1_PT_BW_SHIFT) |
| 348 | | (op->u.passthru.byte_swap << REQ1_PT_BS_SHIFT); |
| 349 | |
| 350 | if (op->src.type == CCP_MEMTYPE_SYSTEM) |
| 351 | cr[1] = op->src.u.dma.length - 1; |
| 352 | else |
| 353 | cr[1] = op->dst.u.dma.length - 1; |
| 354 | |
| 355 | if (op->src.type == CCP_MEMTYPE_SYSTEM) { |
| 356 | cr[2] = ccp_addr_lo(&op->src.u.dma); |
| 357 | cr[3] = (CCP_MEMTYPE_SYSTEM << REQ4_MEMTYPE_SHIFT) |
| 358 | | ccp_addr_hi(&op->src.u.dma); |
| 359 | |
| 360 | if (op->u.passthru.bit_mod != CCP_PASSTHRU_BITWISE_NOOP) |
| 361 | cr[3] |= (op->ksb_key << REQ4_KSB_SHIFT); |
| 362 | } else { |
| 363 | cr[2] = op->src.u.ksb * CCP_KSB_BYTES; |
| 364 | cr[3] = (CCP_MEMTYPE_KSB << REQ4_MEMTYPE_SHIFT); |
| 365 | } |
| 366 | |
| 367 | if (op->dst.type == CCP_MEMTYPE_SYSTEM) { |
| 368 | cr[4] = ccp_addr_lo(&op->dst.u.dma); |
| 369 | cr[5] = (CCP_MEMTYPE_SYSTEM << REQ6_MEMTYPE_SHIFT) |
| 370 | | ccp_addr_hi(&op->dst.u.dma); |
| 371 | } else { |
| 372 | cr[4] = op->dst.u.ksb * CCP_KSB_BYTES; |
| 373 | cr[5] = (CCP_MEMTYPE_KSB << REQ6_MEMTYPE_SHIFT); |
| 374 | } |
| 375 | |
| 376 | if (op->eom) |
| 377 | cr[0] |= REQ1_EOM; |
| 378 | |
| 379 | return ccp_do_cmd(op, cr, ARRAY_SIZE(cr)); |
| 380 | } |
| 381 | |
| 382 | static int ccp_perform_ecc(struct ccp_op *op) |
| 383 | { |
| 384 | u32 cr[6]; |
| 385 | |
| 386 | /* Fill out the register contents for REQ1 through REQ6 */ |
| 387 | cr[0] = REQ1_ECC_AFFINE_CONVERT |
| 388 | | (CCP_ENGINE_ECC << REQ1_ENGINE_SHIFT) |
| 389 | | (op->u.ecc.function << REQ1_ECC_FUNCTION_SHIFT) |
| 390 | | REQ1_EOM; |
| 391 | cr[1] = op->src.u.dma.length - 1; |
| 392 | cr[2] = ccp_addr_lo(&op->src.u.dma); |
| 393 | cr[3] = (CCP_MEMTYPE_SYSTEM << REQ4_MEMTYPE_SHIFT) |
| 394 | | ccp_addr_hi(&op->src.u.dma); |
| 395 | cr[4] = ccp_addr_lo(&op->dst.u.dma); |
| 396 | cr[5] = (CCP_MEMTYPE_SYSTEM << REQ6_MEMTYPE_SHIFT) |
| 397 | | ccp_addr_hi(&op->dst.u.dma); |
| 398 | |
| 399 | return ccp_do_cmd(op, cr, ARRAY_SIZE(cr)); |
| 400 | } |
| 401 | |
| 402 | static u32 ccp_alloc_ksb(struct ccp_device *ccp, unsigned int count) |
| 403 | { |
| 404 | int start; |
| 405 | |
| 406 | for (;;) { |
| 407 | mutex_lock(&ccp->ksb_mutex); |
| 408 | |
| 409 | start = (u32)bitmap_find_next_zero_area(ccp->ksb, |
| 410 | ccp->ksb_count, |
| 411 | ccp->ksb_start, |
| 412 | count, 0); |
| 413 | if (start <= ccp->ksb_count) { |
| 414 | bitmap_set(ccp->ksb, start, count); |
| 415 | |
| 416 | mutex_unlock(&ccp->ksb_mutex); |
| 417 | break; |
| 418 | } |
| 419 | |
| 420 | ccp->ksb_avail = 0; |
| 421 | |
| 422 | mutex_unlock(&ccp->ksb_mutex); |
| 423 | |
| 424 | /* Wait for KSB entries to become available */ |
| 425 | if (wait_event_interruptible(ccp->ksb_queue, ccp->ksb_avail)) |
| 426 | return 0; |
| 427 | } |
| 428 | |
| 429 | return KSB_START + start; |
| 430 | } |
| 431 | |
| 432 | static void ccp_free_ksb(struct ccp_device *ccp, unsigned int start, |
| 433 | unsigned int count) |
| 434 | { |
| 435 | if (!start) |
| 436 | return; |
| 437 | |
| 438 | mutex_lock(&ccp->ksb_mutex); |
| 439 | |
| 440 | bitmap_clear(ccp->ksb, start - KSB_START, count); |
| 441 | |
| 442 | ccp->ksb_avail = 1; |
| 443 | |
| 444 | mutex_unlock(&ccp->ksb_mutex); |
| 445 | |
| 446 | wake_up_interruptible_all(&ccp->ksb_queue); |
| 447 | } |
| 448 | |
| 449 | static u32 ccp_gen_jobid(struct ccp_device *ccp) |
| 450 | { |
| 451 | return atomic_inc_return(&ccp->current_id) & CCP_JOBID_MASK; |
| 452 | } |
| 453 | |
| 454 | static void ccp_sg_free(struct ccp_sg_workarea *wa) |
| 455 | { |
| 456 | if (wa->dma_count) |
| 457 | dma_unmap_sg(wa->dma_dev, wa->dma_sg, wa->nents, wa->dma_dir); |
| 458 | |
| 459 | wa->dma_count = 0; |
| 460 | } |
| 461 | |
| 462 | static int ccp_init_sg_workarea(struct ccp_sg_workarea *wa, struct device *dev, |
Tom Lendacky | 81a59f0 | 2014-01-06 13:34:17 -0600 | [diff] [blame] | 463 | struct scatterlist *sg, u64 len, |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 464 | enum dma_data_direction dma_dir) |
| 465 | { |
| 466 | memset(wa, 0, sizeof(*wa)); |
| 467 | |
| 468 | wa->sg = sg; |
| 469 | if (!sg) |
| 470 | return 0; |
| 471 | |
Tom Lendacky | fb43f69 | 2015-06-01 11:15:53 -0500 | [diff] [blame] | 472 | wa->nents = sg_nents_for_len(sg, len); |
| 473 | if (wa->nents < 0) |
| 474 | return wa->nents; |
| 475 | |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 476 | wa->bytes_left = len; |
| 477 | wa->sg_used = 0; |
| 478 | |
| 479 | if (len == 0) |
| 480 | return 0; |
| 481 | |
| 482 | if (dma_dir == DMA_NONE) |
| 483 | return 0; |
| 484 | |
| 485 | wa->dma_sg = sg; |
| 486 | wa->dma_dev = dev; |
| 487 | wa->dma_dir = dma_dir; |
| 488 | wa->dma_count = dma_map_sg(dev, sg, wa->nents, dma_dir); |
| 489 | if (!wa->dma_count) |
| 490 | return -ENOMEM; |
| 491 | |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 492 | return 0; |
| 493 | } |
| 494 | |
| 495 | static void ccp_update_sg_workarea(struct ccp_sg_workarea *wa, unsigned int len) |
| 496 | { |
Tom Lendacky | 81a59f0 | 2014-01-06 13:34:17 -0600 | [diff] [blame] | 497 | unsigned int nbytes = min_t(u64, len, wa->bytes_left); |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 498 | |
| 499 | if (!wa->sg) |
| 500 | return; |
| 501 | |
| 502 | wa->sg_used += nbytes; |
| 503 | wa->bytes_left -= nbytes; |
| 504 | if (wa->sg_used == wa->sg->length) { |
| 505 | wa->sg = sg_next(wa->sg); |
| 506 | wa->sg_used = 0; |
| 507 | } |
| 508 | } |
| 509 | |
| 510 | static void ccp_dm_free(struct ccp_dm_workarea *wa) |
| 511 | { |
| 512 | if (wa->length <= CCP_DMAPOOL_MAX_SIZE) { |
| 513 | if (wa->address) |
| 514 | dma_pool_free(wa->dma_pool, wa->address, |
| 515 | wa->dma.address); |
| 516 | } else { |
| 517 | if (wa->dma.address) |
| 518 | dma_unmap_single(wa->dev, wa->dma.address, wa->length, |
| 519 | wa->dma.dir); |
| 520 | kfree(wa->address); |
| 521 | } |
| 522 | |
| 523 | wa->address = NULL; |
| 524 | wa->dma.address = 0; |
| 525 | } |
| 526 | |
| 527 | static int ccp_init_dm_workarea(struct ccp_dm_workarea *wa, |
| 528 | struct ccp_cmd_queue *cmd_q, |
| 529 | unsigned int len, |
| 530 | enum dma_data_direction dir) |
| 531 | { |
| 532 | memset(wa, 0, sizeof(*wa)); |
| 533 | |
| 534 | if (!len) |
| 535 | return 0; |
| 536 | |
| 537 | wa->dev = cmd_q->ccp->dev; |
| 538 | wa->length = len; |
| 539 | |
| 540 | if (len <= CCP_DMAPOOL_MAX_SIZE) { |
| 541 | wa->dma_pool = cmd_q->dma_pool; |
| 542 | |
| 543 | wa->address = dma_pool_alloc(wa->dma_pool, GFP_KERNEL, |
| 544 | &wa->dma.address); |
| 545 | if (!wa->address) |
| 546 | return -ENOMEM; |
| 547 | |
| 548 | wa->dma.length = CCP_DMAPOOL_MAX_SIZE; |
| 549 | |
| 550 | memset(wa->address, 0, CCP_DMAPOOL_MAX_SIZE); |
| 551 | } else { |
| 552 | wa->address = kzalloc(len, GFP_KERNEL); |
| 553 | if (!wa->address) |
| 554 | return -ENOMEM; |
| 555 | |
| 556 | wa->dma.address = dma_map_single(wa->dev, wa->address, len, |
| 557 | dir); |
| 558 | if (!wa->dma.address) |
| 559 | return -ENOMEM; |
| 560 | |
| 561 | wa->dma.length = len; |
| 562 | } |
| 563 | wa->dma.dir = dir; |
| 564 | |
| 565 | return 0; |
| 566 | } |
| 567 | |
| 568 | static void ccp_set_dm_area(struct ccp_dm_workarea *wa, unsigned int wa_offset, |
| 569 | struct scatterlist *sg, unsigned int sg_offset, |
| 570 | unsigned int len) |
| 571 | { |
| 572 | WARN_ON(!wa->address); |
| 573 | |
| 574 | scatterwalk_map_and_copy(wa->address + wa_offset, sg, sg_offset, len, |
| 575 | 0); |
| 576 | } |
| 577 | |
| 578 | static void ccp_get_dm_area(struct ccp_dm_workarea *wa, unsigned int wa_offset, |
| 579 | struct scatterlist *sg, unsigned int sg_offset, |
| 580 | unsigned int len) |
| 581 | { |
| 582 | WARN_ON(!wa->address); |
| 583 | |
| 584 | scatterwalk_map_and_copy(wa->address + wa_offset, sg, sg_offset, len, |
| 585 | 1); |
| 586 | } |
| 587 | |
Tom Lendacky | 355eba5 | 2015-10-01 16:32:31 -0500 | [diff] [blame] | 588 | static int ccp_reverse_set_dm_area(struct ccp_dm_workarea *wa, |
| 589 | struct scatterlist *sg, |
| 590 | unsigned int len, unsigned int se_len, |
| 591 | bool sign_extend) |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 592 | { |
| 593 | unsigned int nbytes, sg_offset, dm_offset, ksb_len, i; |
| 594 | u8 buffer[CCP_REVERSE_BUF_SIZE]; |
| 595 | |
Tom Lendacky | 355eba5 | 2015-10-01 16:32:31 -0500 | [diff] [blame] | 596 | if (WARN_ON(se_len > sizeof(buffer))) |
| 597 | return -EINVAL; |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 598 | |
| 599 | sg_offset = len; |
| 600 | dm_offset = 0; |
| 601 | nbytes = len; |
| 602 | while (nbytes) { |
| 603 | ksb_len = min_t(unsigned int, nbytes, se_len); |
| 604 | sg_offset -= ksb_len; |
| 605 | |
| 606 | scatterwalk_map_and_copy(buffer, sg, sg_offset, ksb_len, 0); |
| 607 | for (i = 0; i < ksb_len; i++) |
| 608 | wa->address[dm_offset + i] = buffer[ksb_len - i - 1]; |
| 609 | |
| 610 | dm_offset += ksb_len; |
| 611 | nbytes -= ksb_len; |
| 612 | |
| 613 | if ((ksb_len != se_len) && sign_extend) { |
| 614 | /* Must sign-extend to nearest sign-extend length */ |
| 615 | if (wa->address[dm_offset - 1] & 0x80) |
| 616 | memset(wa->address + dm_offset, 0xff, |
| 617 | se_len - ksb_len); |
| 618 | } |
| 619 | } |
Tom Lendacky | 355eba5 | 2015-10-01 16:32:31 -0500 | [diff] [blame] | 620 | |
| 621 | return 0; |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 622 | } |
| 623 | |
| 624 | static void ccp_reverse_get_dm_area(struct ccp_dm_workarea *wa, |
| 625 | struct scatterlist *sg, |
| 626 | unsigned int len) |
| 627 | { |
| 628 | unsigned int nbytes, sg_offset, dm_offset, ksb_len, i; |
| 629 | u8 buffer[CCP_REVERSE_BUF_SIZE]; |
| 630 | |
| 631 | sg_offset = 0; |
| 632 | dm_offset = len; |
| 633 | nbytes = len; |
| 634 | while (nbytes) { |
| 635 | ksb_len = min_t(unsigned int, nbytes, sizeof(buffer)); |
| 636 | dm_offset -= ksb_len; |
| 637 | |
| 638 | for (i = 0; i < ksb_len; i++) |
| 639 | buffer[ksb_len - i - 1] = wa->address[dm_offset + i]; |
| 640 | scatterwalk_map_and_copy(buffer, sg, sg_offset, ksb_len, 1); |
| 641 | |
| 642 | sg_offset += ksb_len; |
| 643 | nbytes -= ksb_len; |
| 644 | } |
| 645 | } |
| 646 | |
| 647 | static void ccp_free_data(struct ccp_data *data, struct ccp_cmd_queue *cmd_q) |
| 648 | { |
| 649 | ccp_dm_free(&data->dm_wa); |
| 650 | ccp_sg_free(&data->sg_wa); |
| 651 | } |
| 652 | |
| 653 | static int ccp_init_data(struct ccp_data *data, struct ccp_cmd_queue *cmd_q, |
Tom Lendacky | 81a59f0 | 2014-01-06 13:34:17 -0600 | [diff] [blame] | 654 | struct scatterlist *sg, u64 sg_len, |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 655 | unsigned int dm_len, |
| 656 | enum dma_data_direction dir) |
| 657 | { |
| 658 | int ret; |
| 659 | |
| 660 | memset(data, 0, sizeof(*data)); |
| 661 | |
| 662 | ret = ccp_init_sg_workarea(&data->sg_wa, cmd_q->ccp->dev, sg, sg_len, |
| 663 | dir); |
| 664 | if (ret) |
| 665 | goto e_err; |
| 666 | |
| 667 | ret = ccp_init_dm_workarea(&data->dm_wa, cmd_q, dm_len, dir); |
| 668 | if (ret) |
| 669 | goto e_err; |
| 670 | |
| 671 | return 0; |
| 672 | |
| 673 | e_err: |
| 674 | ccp_free_data(data, cmd_q); |
| 675 | |
| 676 | return ret; |
| 677 | } |
| 678 | |
| 679 | static unsigned int ccp_queue_buf(struct ccp_data *data, unsigned int from) |
| 680 | { |
| 681 | struct ccp_sg_workarea *sg_wa = &data->sg_wa; |
| 682 | struct ccp_dm_workarea *dm_wa = &data->dm_wa; |
| 683 | unsigned int buf_count, nbytes; |
| 684 | |
| 685 | /* Clear the buffer if setting it */ |
| 686 | if (!from) |
| 687 | memset(dm_wa->address, 0, dm_wa->length); |
| 688 | |
| 689 | if (!sg_wa->sg) |
| 690 | return 0; |
| 691 | |
Tom Lendacky | 81a59f0 | 2014-01-06 13:34:17 -0600 | [diff] [blame] | 692 | /* Perform the copy operation |
| 693 | * nbytes will always be <= UINT_MAX because dm_wa->length is |
| 694 | * an unsigned int |
| 695 | */ |
| 696 | nbytes = min_t(u64, sg_wa->bytes_left, dm_wa->length); |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 697 | scatterwalk_map_and_copy(dm_wa->address, sg_wa->sg, sg_wa->sg_used, |
| 698 | nbytes, from); |
| 699 | |
| 700 | /* Update the structures and generate the count */ |
| 701 | buf_count = 0; |
| 702 | while (sg_wa->bytes_left && (buf_count < dm_wa->length)) { |
Tom Lendacky | 81a59f0 | 2014-01-06 13:34:17 -0600 | [diff] [blame] | 703 | nbytes = min(sg_wa->sg->length - sg_wa->sg_used, |
| 704 | dm_wa->length - buf_count); |
| 705 | nbytes = min_t(u64, sg_wa->bytes_left, nbytes); |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 706 | |
| 707 | buf_count += nbytes; |
| 708 | ccp_update_sg_workarea(sg_wa, nbytes); |
| 709 | } |
| 710 | |
| 711 | return buf_count; |
| 712 | } |
| 713 | |
| 714 | static unsigned int ccp_fill_queue_buf(struct ccp_data *data) |
| 715 | { |
| 716 | return ccp_queue_buf(data, 0); |
| 717 | } |
| 718 | |
| 719 | static unsigned int ccp_empty_queue_buf(struct ccp_data *data) |
| 720 | { |
| 721 | return ccp_queue_buf(data, 1); |
| 722 | } |
| 723 | |
| 724 | static void ccp_prepare_data(struct ccp_data *src, struct ccp_data *dst, |
| 725 | struct ccp_op *op, unsigned int block_size, |
| 726 | bool blocksize_op) |
| 727 | { |
| 728 | unsigned int sg_src_len, sg_dst_len, op_len; |
| 729 | |
| 730 | /* The CCP can only DMA from/to one address each per operation. This |
| 731 | * requires that we find the smallest DMA area between the source |
Tom Lendacky | 81a59f0 | 2014-01-06 13:34:17 -0600 | [diff] [blame] | 732 | * and destination. The resulting len values will always be <= UINT_MAX |
| 733 | * because the dma length is an unsigned int. |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 734 | */ |
Tom Lendacky | 81a59f0 | 2014-01-06 13:34:17 -0600 | [diff] [blame] | 735 | sg_src_len = sg_dma_len(src->sg_wa.sg) - src->sg_wa.sg_used; |
| 736 | sg_src_len = min_t(u64, src->sg_wa.bytes_left, sg_src_len); |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 737 | |
| 738 | if (dst) { |
Tom Lendacky | 81a59f0 | 2014-01-06 13:34:17 -0600 | [diff] [blame] | 739 | sg_dst_len = sg_dma_len(dst->sg_wa.sg) - dst->sg_wa.sg_used; |
| 740 | sg_dst_len = min_t(u64, src->sg_wa.bytes_left, sg_dst_len); |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 741 | op_len = min(sg_src_len, sg_dst_len); |
Tom Lendacky | 8db8846 | 2015-02-03 13:07:05 -0600 | [diff] [blame] | 742 | } else { |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 743 | op_len = sg_src_len; |
Tom Lendacky | 8db8846 | 2015-02-03 13:07:05 -0600 | [diff] [blame] | 744 | } |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 745 | |
| 746 | /* The data operation length will be at least block_size in length |
| 747 | * or the smaller of available sg room remaining for the source or |
| 748 | * the destination |
| 749 | */ |
| 750 | op_len = max(op_len, block_size); |
| 751 | |
| 752 | /* Unless we have to buffer data, there's no reason to wait */ |
| 753 | op->soc = 0; |
| 754 | |
| 755 | if (sg_src_len < block_size) { |
| 756 | /* Not enough data in the sg element, so it |
| 757 | * needs to be buffered into a blocksize chunk |
| 758 | */ |
| 759 | int cp_len = ccp_fill_queue_buf(src); |
| 760 | |
| 761 | op->soc = 1; |
| 762 | op->src.u.dma.address = src->dm_wa.dma.address; |
| 763 | op->src.u.dma.offset = 0; |
| 764 | op->src.u.dma.length = (blocksize_op) ? block_size : cp_len; |
| 765 | } else { |
| 766 | /* Enough data in the sg element, but we need to |
| 767 | * adjust for any previously copied data |
| 768 | */ |
| 769 | op->src.u.dma.address = sg_dma_address(src->sg_wa.sg); |
| 770 | op->src.u.dma.offset = src->sg_wa.sg_used; |
| 771 | op->src.u.dma.length = op_len & ~(block_size - 1); |
| 772 | |
| 773 | ccp_update_sg_workarea(&src->sg_wa, op->src.u.dma.length); |
| 774 | } |
| 775 | |
| 776 | if (dst) { |
| 777 | if (sg_dst_len < block_size) { |
| 778 | /* Not enough room in the sg element or we're on the |
| 779 | * last piece of data (when using padding), so the |
| 780 | * output needs to be buffered into a blocksize chunk |
| 781 | */ |
| 782 | op->soc = 1; |
| 783 | op->dst.u.dma.address = dst->dm_wa.dma.address; |
| 784 | op->dst.u.dma.offset = 0; |
| 785 | op->dst.u.dma.length = op->src.u.dma.length; |
| 786 | } else { |
| 787 | /* Enough room in the sg element, but we need to |
| 788 | * adjust for any previously used area |
| 789 | */ |
| 790 | op->dst.u.dma.address = sg_dma_address(dst->sg_wa.sg); |
| 791 | op->dst.u.dma.offset = dst->sg_wa.sg_used; |
| 792 | op->dst.u.dma.length = op->src.u.dma.length; |
| 793 | } |
| 794 | } |
| 795 | } |
| 796 | |
| 797 | static void ccp_process_data(struct ccp_data *src, struct ccp_data *dst, |
| 798 | struct ccp_op *op) |
| 799 | { |
| 800 | op->init = 0; |
| 801 | |
| 802 | if (dst) { |
| 803 | if (op->dst.u.dma.address == dst->dm_wa.dma.address) |
| 804 | ccp_empty_queue_buf(dst); |
| 805 | else |
| 806 | ccp_update_sg_workarea(&dst->sg_wa, |
| 807 | op->dst.u.dma.length); |
| 808 | } |
| 809 | } |
| 810 | |
| 811 | static int ccp_copy_to_from_ksb(struct ccp_cmd_queue *cmd_q, |
| 812 | struct ccp_dm_workarea *wa, u32 jobid, u32 ksb, |
| 813 | u32 byte_swap, bool from) |
| 814 | { |
| 815 | struct ccp_op op; |
| 816 | |
| 817 | memset(&op, 0, sizeof(op)); |
| 818 | |
| 819 | op.cmd_q = cmd_q; |
| 820 | op.jobid = jobid; |
| 821 | op.eom = 1; |
| 822 | |
| 823 | if (from) { |
| 824 | op.soc = 1; |
| 825 | op.src.type = CCP_MEMTYPE_KSB; |
| 826 | op.src.u.ksb = ksb; |
| 827 | op.dst.type = CCP_MEMTYPE_SYSTEM; |
| 828 | op.dst.u.dma.address = wa->dma.address; |
| 829 | op.dst.u.dma.length = wa->length; |
| 830 | } else { |
| 831 | op.src.type = CCP_MEMTYPE_SYSTEM; |
| 832 | op.src.u.dma.address = wa->dma.address; |
| 833 | op.src.u.dma.length = wa->length; |
| 834 | op.dst.type = CCP_MEMTYPE_KSB; |
| 835 | op.dst.u.ksb = ksb; |
| 836 | } |
| 837 | |
| 838 | op.u.passthru.byte_swap = byte_swap; |
| 839 | |
| 840 | return ccp_perform_passthru(&op); |
| 841 | } |
| 842 | |
| 843 | static int ccp_copy_to_ksb(struct ccp_cmd_queue *cmd_q, |
| 844 | struct ccp_dm_workarea *wa, u32 jobid, u32 ksb, |
| 845 | u32 byte_swap) |
| 846 | { |
| 847 | return ccp_copy_to_from_ksb(cmd_q, wa, jobid, ksb, byte_swap, false); |
| 848 | } |
| 849 | |
| 850 | static int ccp_copy_from_ksb(struct ccp_cmd_queue *cmd_q, |
| 851 | struct ccp_dm_workarea *wa, u32 jobid, u32 ksb, |
| 852 | u32 byte_swap) |
| 853 | { |
| 854 | return ccp_copy_to_from_ksb(cmd_q, wa, jobid, ksb, byte_swap, true); |
| 855 | } |
| 856 | |
| 857 | static int ccp_run_aes_cmac_cmd(struct ccp_cmd_queue *cmd_q, |
| 858 | struct ccp_cmd *cmd) |
| 859 | { |
| 860 | struct ccp_aes_engine *aes = &cmd->u.aes; |
| 861 | struct ccp_dm_workarea key, ctx; |
| 862 | struct ccp_data src; |
| 863 | struct ccp_op op; |
| 864 | unsigned int dm_offset; |
| 865 | int ret; |
| 866 | |
| 867 | if (!((aes->key_len == AES_KEYSIZE_128) || |
| 868 | (aes->key_len == AES_KEYSIZE_192) || |
| 869 | (aes->key_len == AES_KEYSIZE_256))) |
| 870 | return -EINVAL; |
| 871 | |
| 872 | if (aes->src_len & (AES_BLOCK_SIZE - 1)) |
| 873 | return -EINVAL; |
| 874 | |
| 875 | if (aes->iv_len != AES_BLOCK_SIZE) |
| 876 | return -EINVAL; |
| 877 | |
| 878 | if (!aes->key || !aes->iv || !aes->src) |
| 879 | return -EINVAL; |
| 880 | |
| 881 | if (aes->cmac_final) { |
| 882 | if (aes->cmac_key_len != AES_BLOCK_SIZE) |
| 883 | return -EINVAL; |
| 884 | |
| 885 | if (!aes->cmac_key) |
| 886 | return -EINVAL; |
| 887 | } |
| 888 | |
| 889 | BUILD_BUG_ON(CCP_AES_KEY_KSB_COUNT != 1); |
| 890 | BUILD_BUG_ON(CCP_AES_CTX_KSB_COUNT != 1); |
| 891 | |
| 892 | ret = -EIO; |
| 893 | memset(&op, 0, sizeof(op)); |
| 894 | op.cmd_q = cmd_q; |
| 895 | op.jobid = ccp_gen_jobid(cmd_q->ccp); |
| 896 | op.ksb_key = cmd_q->ksb_key; |
| 897 | op.ksb_ctx = cmd_q->ksb_ctx; |
| 898 | op.init = 1; |
| 899 | op.u.aes.type = aes->type; |
| 900 | op.u.aes.mode = aes->mode; |
| 901 | op.u.aes.action = aes->action; |
| 902 | |
| 903 | /* All supported key sizes fit in a single (32-byte) KSB entry |
| 904 | * and must be in little endian format. Use the 256-bit byte |
| 905 | * swap passthru option to convert from big endian to little |
| 906 | * endian. |
| 907 | */ |
| 908 | ret = ccp_init_dm_workarea(&key, cmd_q, |
| 909 | CCP_AES_KEY_KSB_COUNT * CCP_KSB_BYTES, |
| 910 | DMA_TO_DEVICE); |
| 911 | if (ret) |
| 912 | return ret; |
| 913 | |
| 914 | dm_offset = CCP_KSB_BYTES - aes->key_len; |
| 915 | ccp_set_dm_area(&key, dm_offset, aes->key, 0, aes->key_len); |
| 916 | ret = ccp_copy_to_ksb(cmd_q, &key, op.jobid, op.ksb_key, |
| 917 | CCP_PASSTHRU_BYTESWAP_256BIT); |
| 918 | if (ret) { |
| 919 | cmd->engine_error = cmd_q->cmd_error; |
| 920 | goto e_key; |
| 921 | } |
| 922 | |
| 923 | /* The AES context fits in a single (32-byte) KSB entry and |
| 924 | * must be in little endian format. Use the 256-bit byte swap |
| 925 | * passthru option to convert from big endian to little endian. |
| 926 | */ |
| 927 | ret = ccp_init_dm_workarea(&ctx, cmd_q, |
| 928 | CCP_AES_CTX_KSB_COUNT * CCP_KSB_BYTES, |
| 929 | DMA_BIDIRECTIONAL); |
| 930 | if (ret) |
| 931 | goto e_key; |
| 932 | |
| 933 | dm_offset = CCP_KSB_BYTES - AES_BLOCK_SIZE; |
| 934 | ccp_set_dm_area(&ctx, dm_offset, aes->iv, 0, aes->iv_len); |
| 935 | ret = ccp_copy_to_ksb(cmd_q, &ctx, op.jobid, op.ksb_ctx, |
| 936 | CCP_PASSTHRU_BYTESWAP_256BIT); |
| 937 | if (ret) { |
| 938 | cmd->engine_error = cmd_q->cmd_error; |
| 939 | goto e_ctx; |
| 940 | } |
| 941 | |
| 942 | /* Send data to the CCP AES engine */ |
| 943 | ret = ccp_init_data(&src, cmd_q, aes->src, aes->src_len, |
| 944 | AES_BLOCK_SIZE, DMA_TO_DEVICE); |
| 945 | if (ret) |
| 946 | goto e_ctx; |
| 947 | |
| 948 | while (src.sg_wa.bytes_left) { |
| 949 | ccp_prepare_data(&src, NULL, &op, AES_BLOCK_SIZE, true); |
| 950 | if (aes->cmac_final && !src.sg_wa.bytes_left) { |
| 951 | op.eom = 1; |
| 952 | |
| 953 | /* Push the K1/K2 key to the CCP now */ |
| 954 | ret = ccp_copy_from_ksb(cmd_q, &ctx, op.jobid, |
| 955 | op.ksb_ctx, |
| 956 | CCP_PASSTHRU_BYTESWAP_256BIT); |
| 957 | if (ret) { |
| 958 | cmd->engine_error = cmd_q->cmd_error; |
| 959 | goto e_src; |
| 960 | } |
| 961 | |
| 962 | ccp_set_dm_area(&ctx, 0, aes->cmac_key, 0, |
| 963 | aes->cmac_key_len); |
| 964 | ret = ccp_copy_to_ksb(cmd_q, &ctx, op.jobid, op.ksb_ctx, |
| 965 | CCP_PASSTHRU_BYTESWAP_256BIT); |
| 966 | if (ret) { |
| 967 | cmd->engine_error = cmd_q->cmd_error; |
| 968 | goto e_src; |
| 969 | } |
| 970 | } |
| 971 | |
| 972 | ret = ccp_perform_aes(&op); |
| 973 | if (ret) { |
| 974 | cmd->engine_error = cmd_q->cmd_error; |
| 975 | goto e_src; |
| 976 | } |
| 977 | |
| 978 | ccp_process_data(&src, NULL, &op); |
| 979 | } |
| 980 | |
| 981 | /* Retrieve the AES context - convert from LE to BE using |
| 982 | * 32-byte (256-bit) byteswapping |
| 983 | */ |
| 984 | ret = ccp_copy_from_ksb(cmd_q, &ctx, op.jobid, op.ksb_ctx, |
| 985 | CCP_PASSTHRU_BYTESWAP_256BIT); |
| 986 | if (ret) { |
| 987 | cmd->engine_error = cmd_q->cmd_error; |
| 988 | goto e_src; |
| 989 | } |
| 990 | |
| 991 | /* ...but we only need AES_BLOCK_SIZE bytes */ |
| 992 | dm_offset = CCP_KSB_BYTES - AES_BLOCK_SIZE; |
| 993 | ccp_get_dm_area(&ctx, dm_offset, aes->iv, 0, aes->iv_len); |
| 994 | |
| 995 | e_src: |
| 996 | ccp_free_data(&src, cmd_q); |
| 997 | |
| 998 | e_ctx: |
| 999 | ccp_dm_free(&ctx); |
| 1000 | |
| 1001 | e_key: |
| 1002 | ccp_dm_free(&key); |
| 1003 | |
| 1004 | return ret; |
| 1005 | } |
| 1006 | |
| 1007 | static int ccp_run_aes_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd) |
| 1008 | { |
| 1009 | struct ccp_aes_engine *aes = &cmd->u.aes; |
| 1010 | struct ccp_dm_workarea key, ctx; |
| 1011 | struct ccp_data src, dst; |
| 1012 | struct ccp_op op; |
| 1013 | unsigned int dm_offset; |
| 1014 | bool in_place = false; |
| 1015 | int ret; |
| 1016 | |
| 1017 | if (aes->mode == CCP_AES_MODE_CMAC) |
| 1018 | return ccp_run_aes_cmac_cmd(cmd_q, cmd); |
| 1019 | |
| 1020 | if (!((aes->key_len == AES_KEYSIZE_128) || |
| 1021 | (aes->key_len == AES_KEYSIZE_192) || |
| 1022 | (aes->key_len == AES_KEYSIZE_256))) |
| 1023 | return -EINVAL; |
| 1024 | |
| 1025 | if (((aes->mode == CCP_AES_MODE_ECB) || |
| 1026 | (aes->mode == CCP_AES_MODE_CBC) || |
| 1027 | (aes->mode == CCP_AES_MODE_CFB)) && |
| 1028 | (aes->src_len & (AES_BLOCK_SIZE - 1))) |
| 1029 | return -EINVAL; |
| 1030 | |
| 1031 | if (!aes->key || !aes->src || !aes->dst) |
| 1032 | return -EINVAL; |
| 1033 | |
| 1034 | if (aes->mode != CCP_AES_MODE_ECB) { |
| 1035 | if (aes->iv_len != AES_BLOCK_SIZE) |
| 1036 | return -EINVAL; |
| 1037 | |
| 1038 | if (!aes->iv) |
| 1039 | return -EINVAL; |
| 1040 | } |
| 1041 | |
| 1042 | BUILD_BUG_ON(CCP_AES_KEY_KSB_COUNT != 1); |
| 1043 | BUILD_BUG_ON(CCP_AES_CTX_KSB_COUNT != 1); |
| 1044 | |
| 1045 | ret = -EIO; |
| 1046 | memset(&op, 0, sizeof(op)); |
| 1047 | op.cmd_q = cmd_q; |
| 1048 | op.jobid = ccp_gen_jobid(cmd_q->ccp); |
| 1049 | op.ksb_key = cmd_q->ksb_key; |
| 1050 | op.ksb_ctx = cmd_q->ksb_ctx; |
| 1051 | op.init = (aes->mode == CCP_AES_MODE_ECB) ? 0 : 1; |
| 1052 | op.u.aes.type = aes->type; |
| 1053 | op.u.aes.mode = aes->mode; |
| 1054 | op.u.aes.action = aes->action; |
| 1055 | |
| 1056 | /* All supported key sizes fit in a single (32-byte) KSB entry |
| 1057 | * and must be in little endian format. Use the 256-bit byte |
| 1058 | * swap passthru option to convert from big endian to little |
| 1059 | * endian. |
| 1060 | */ |
| 1061 | ret = ccp_init_dm_workarea(&key, cmd_q, |
| 1062 | CCP_AES_KEY_KSB_COUNT * CCP_KSB_BYTES, |
| 1063 | DMA_TO_DEVICE); |
| 1064 | if (ret) |
| 1065 | return ret; |
| 1066 | |
| 1067 | dm_offset = CCP_KSB_BYTES - aes->key_len; |
| 1068 | ccp_set_dm_area(&key, dm_offset, aes->key, 0, aes->key_len); |
| 1069 | ret = ccp_copy_to_ksb(cmd_q, &key, op.jobid, op.ksb_key, |
| 1070 | CCP_PASSTHRU_BYTESWAP_256BIT); |
| 1071 | if (ret) { |
| 1072 | cmd->engine_error = cmd_q->cmd_error; |
| 1073 | goto e_key; |
| 1074 | } |
| 1075 | |
| 1076 | /* The AES context fits in a single (32-byte) KSB entry and |
| 1077 | * must be in little endian format. Use the 256-bit byte swap |
| 1078 | * passthru option to convert from big endian to little endian. |
| 1079 | */ |
| 1080 | ret = ccp_init_dm_workarea(&ctx, cmd_q, |
| 1081 | CCP_AES_CTX_KSB_COUNT * CCP_KSB_BYTES, |
| 1082 | DMA_BIDIRECTIONAL); |
| 1083 | if (ret) |
| 1084 | goto e_key; |
| 1085 | |
| 1086 | if (aes->mode != CCP_AES_MODE_ECB) { |
| 1087 | /* Load the AES context - conver to LE */ |
| 1088 | dm_offset = CCP_KSB_BYTES - AES_BLOCK_SIZE; |
| 1089 | ccp_set_dm_area(&ctx, dm_offset, aes->iv, 0, aes->iv_len); |
| 1090 | ret = ccp_copy_to_ksb(cmd_q, &ctx, op.jobid, op.ksb_ctx, |
| 1091 | CCP_PASSTHRU_BYTESWAP_256BIT); |
| 1092 | if (ret) { |
| 1093 | cmd->engine_error = cmd_q->cmd_error; |
| 1094 | goto e_ctx; |
| 1095 | } |
| 1096 | } |
| 1097 | |
| 1098 | /* Prepare the input and output data workareas. For in-place |
| 1099 | * operations we need to set the dma direction to BIDIRECTIONAL |
| 1100 | * and copy the src workarea to the dst workarea. |
| 1101 | */ |
| 1102 | if (sg_virt(aes->src) == sg_virt(aes->dst)) |
| 1103 | in_place = true; |
| 1104 | |
| 1105 | ret = ccp_init_data(&src, cmd_q, aes->src, aes->src_len, |
| 1106 | AES_BLOCK_SIZE, |
| 1107 | in_place ? DMA_BIDIRECTIONAL : DMA_TO_DEVICE); |
| 1108 | if (ret) |
| 1109 | goto e_ctx; |
| 1110 | |
Tom Lendacky | 8db8846 | 2015-02-03 13:07:05 -0600 | [diff] [blame] | 1111 | if (in_place) { |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 1112 | dst = src; |
Tom Lendacky | 8db8846 | 2015-02-03 13:07:05 -0600 | [diff] [blame] | 1113 | } else { |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 1114 | ret = ccp_init_data(&dst, cmd_q, aes->dst, aes->src_len, |
| 1115 | AES_BLOCK_SIZE, DMA_FROM_DEVICE); |
| 1116 | if (ret) |
| 1117 | goto e_src; |
| 1118 | } |
| 1119 | |
| 1120 | /* Send data to the CCP AES engine */ |
| 1121 | while (src.sg_wa.bytes_left) { |
| 1122 | ccp_prepare_data(&src, &dst, &op, AES_BLOCK_SIZE, true); |
| 1123 | if (!src.sg_wa.bytes_left) { |
| 1124 | op.eom = 1; |
| 1125 | |
| 1126 | /* Since we don't retrieve the AES context in ECB |
| 1127 | * mode we have to wait for the operation to complete |
| 1128 | * on the last piece of data |
| 1129 | */ |
| 1130 | if (aes->mode == CCP_AES_MODE_ECB) |
| 1131 | op.soc = 1; |
| 1132 | } |
| 1133 | |
| 1134 | ret = ccp_perform_aes(&op); |
| 1135 | if (ret) { |
| 1136 | cmd->engine_error = cmd_q->cmd_error; |
| 1137 | goto e_dst; |
| 1138 | } |
| 1139 | |
| 1140 | ccp_process_data(&src, &dst, &op); |
| 1141 | } |
| 1142 | |
| 1143 | if (aes->mode != CCP_AES_MODE_ECB) { |
| 1144 | /* Retrieve the AES context - convert from LE to BE using |
| 1145 | * 32-byte (256-bit) byteswapping |
| 1146 | */ |
| 1147 | ret = ccp_copy_from_ksb(cmd_q, &ctx, op.jobid, op.ksb_ctx, |
| 1148 | CCP_PASSTHRU_BYTESWAP_256BIT); |
| 1149 | if (ret) { |
| 1150 | cmd->engine_error = cmd_q->cmd_error; |
| 1151 | goto e_dst; |
| 1152 | } |
| 1153 | |
| 1154 | /* ...but we only need AES_BLOCK_SIZE bytes */ |
| 1155 | dm_offset = CCP_KSB_BYTES - AES_BLOCK_SIZE; |
| 1156 | ccp_get_dm_area(&ctx, dm_offset, aes->iv, 0, aes->iv_len); |
| 1157 | } |
| 1158 | |
| 1159 | e_dst: |
| 1160 | if (!in_place) |
| 1161 | ccp_free_data(&dst, cmd_q); |
| 1162 | |
| 1163 | e_src: |
| 1164 | ccp_free_data(&src, cmd_q); |
| 1165 | |
| 1166 | e_ctx: |
| 1167 | ccp_dm_free(&ctx); |
| 1168 | |
| 1169 | e_key: |
| 1170 | ccp_dm_free(&key); |
| 1171 | |
| 1172 | return ret; |
| 1173 | } |
| 1174 | |
| 1175 | static int ccp_run_xts_aes_cmd(struct ccp_cmd_queue *cmd_q, |
| 1176 | struct ccp_cmd *cmd) |
| 1177 | { |
| 1178 | struct ccp_xts_aes_engine *xts = &cmd->u.xts; |
| 1179 | struct ccp_dm_workarea key, ctx; |
| 1180 | struct ccp_data src, dst; |
| 1181 | struct ccp_op op; |
| 1182 | unsigned int unit_size, dm_offset; |
| 1183 | bool in_place = false; |
| 1184 | int ret; |
| 1185 | |
| 1186 | switch (xts->unit_size) { |
| 1187 | case CCP_XTS_AES_UNIT_SIZE_16: |
| 1188 | unit_size = 16; |
| 1189 | break; |
| 1190 | case CCP_XTS_AES_UNIT_SIZE_512: |
| 1191 | unit_size = 512; |
| 1192 | break; |
| 1193 | case CCP_XTS_AES_UNIT_SIZE_1024: |
| 1194 | unit_size = 1024; |
| 1195 | break; |
| 1196 | case CCP_XTS_AES_UNIT_SIZE_2048: |
| 1197 | unit_size = 2048; |
| 1198 | break; |
| 1199 | case CCP_XTS_AES_UNIT_SIZE_4096: |
| 1200 | unit_size = 4096; |
| 1201 | break; |
| 1202 | |
| 1203 | default: |
| 1204 | return -EINVAL; |
| 1205 | } |
| 1206 | |
| 1207 | if (xts->key_len != AES_KEYSIZE_128) |
| 1208 | return -EINVAL; |
| 1209 | |
| 1210 | if (!xts->final && (xts->src_len & (AES_BLOCK_SIZE - 1))) |
| 1211 | return -EINVAL; |
| 1212 | |
| 1213 | if (xts->iv_len != AES_BLOCK_SIZE) |
| 1214 | return -EINVAL; |
| 1215 | |
| 1216 | if (!xts->key || !xts->iv || !xts->src || !xts->dst) |
| 1217 | return -EINVAL; |
| 1218 | |
| 1219 | BUILD_BUG_ON(CCP_XTS_AES_KEY_KSB_COUNT != 1); |
| 1220 | BUILD_BUG_ON(CCP_XTS_AES_CTX_KSB_COUNT != 1); |
| 1221 | |
| 1222 | ret = -EIO; |
| 1223 | memset(&op, 0, sizeof(op)); |
| 1224 | op.cmd_q = cmd_q; |
| 1225 | op.jobid = ccp_gen_jobid(cmd_q->ccp); |
| 1226 | op.ksb_key = cmd_q->ksb_key; |
| 1227 | op.ksb_ctx = cmd_q->ksb_ctx; |
| 1228 | op.init = 1; |
| 1229 | op.u.xts.action = xts->action; |
| 1230 | op.u.xts.unit_size = xts->unit_size; |
| 1231 | |
| 1232 | /* All supported key sizes fit in a single (32-byte) KSB entry |
| 1233 | * and must be in little endian format. Use the 256-bit byte |
| 1234 | * swap passthru option to convert from big endian to little |
| 1235 | * endian. |
| 1236 | */ |
| 1237 | ret = ccp_init_dm_workarea(&key, cmd_q, |
| 1238 | CCP_XTS_AES_KEY_KSB_COUNT * CCP_KSB_BYTES, |
| 1239 | DMA_TO_DEVICE); |
| 1240 | if (ret) |
| 1241 | return ret; |
| 1242 | |
| 1243 | dm_offset = CCP_KSB_BYTES - AES_KEYSIZE_128; |
| 1244 | ccp_set_dm_area(&key, dm_offset, xts->key, 0, xts->key_len); |
| 1245 | ccp_set_dm_area(&key, 0, xts->key, dm_offset, xts->key_len); |
| 1246 | ret = ccp_copy_to_ksb(cmd_q, &key, op.jobid, op.ksb_key, |
| 1247 | CCP_PASSTHRU_BYTESWAP_256BIT); |
| 1248 | if (ret) { |
| 1249 | cmd->engine_error = cmd_q->cmd_error; |
| 1250 | goto e_key; |
| 1251 | } |
| 1252 | |
| 1253 | /* The AES context fits in a single (32-byte) KSB entry and |
| 1254 | * for XTS is already in little endian format so no byte swapping |
| 1255 | * is needed. |
| 1256 | */ |
| 1257 | ret = ccp_init_dm_workarea(&ctx, cmd_q, |
| 1258 | CCP_XTS_AES_CTX_KSB_COUNT * CCP_KSB_BYTES, |
| 1259 | DMA_BIDIRECTIONAL); |
| 1260 | if (ret) |
| 1261 | goto e_key; |
| 1262 | |
| 1263 | ccp_set_dm_area(&ctx, 0, xts->iv, 0, xts->iv_len); |
| 1264 | ret = ccp_copy_to_ksb(cmd_q, &ctx, op.jobid, op.ksb_ctx, |
| 1265 | CCP_PASSTHRU_BYTESWAP_NOOP); |
| 1266 | if (ret) { |
| 1267 | cmd->engine_error = cmd_q->cmd_error; |
| 1268 | goto e_ctx; |
| 1269 | } |
| 1270 | |
| 1271 | /* Prepare the input and output data workareas. For in-place |
| 1272 | * operations we need to set the dma direction to BIDIRECTIONAL |
| 1273 | * and copy the src workarea to the dst workarea. |
| 1274 | */ |
| 1275 | if (sg_virt(xts->src) == sg_virt(xts->dst)) |
| 1276 | in_place = true; |
| 1277 | |
| 1278 | ret = ccp_init_data(&src, cmd_q, xts->src, xts->src_len, |
| 1279 | unit_size, |
| 1280 | in_place ? DMA_BIDIRECTIONAL : DMA_TO_DEVICE); |
| 1281 | if (ret) |
| 1282 | goto e_ctx; |
| 1283 | |
Tom Lendacky | 8db8846 | 2015-02-03 13:07:05 -0600 | [diff] [blame] | 1284 | if (in_place) { |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 1285 | dst = src; |
Tom Lendacky | 8db8846 | 2015-02-03 13:07:05 -0600 | [diff] [blame] | 1286 | } else { |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 1287 | ret = ccp_init_data(&dst, cmd_q, xts->dst, xts->src_len, |
| 1288 | unit_size, DMA_FROM_DEVICE); |
| 1289 | if (ret) |
| 1290 | goto e_src; |
| 1291 | } |
| 1292 | |
| 1293 | /* Send data to the CCP AES engine */ |
| 1294 | while (src.sg_wa.bytes_left) { |
| 1295 | ccp_prepare_data(&src, &dst, &op, unit_size, true); |
| 1296 | if (!src.sg_wa.bytes_left) |
| 1297 | op.eom = 1; |
| 1298 | |
| 1299 | ret = ccp_perform_xts_aes(&op); |
| 1300 | if (ret) { |
| 1301 | cmd->engine_error = cmd_q->cmd_error; |
| 1302 | goto e_dst; |
| 1303 | } |
| 1304 | |
| 1305 | ccp_process_data(&src, &dst, &op); |
| 1306 | } |
| 1307 | |
| 1308 | /* Retrieve the AES context - convert from LE to BE using |
| 1309 | * 32-byte (256-bit) byteswapping |
| 1310 | */ |
| 1311 | ret = ccp_copy_from_ksb(cmd_q, &ctx, op.jobid, op.ksb_ctx, |
| 1312 | CCP_PASSTHRU_BYTESWAP_256BIT); |
| 1313 | if (ret) { |
| 1314 | cmd->engine_error = cmd_q->cmd_error; |
| 1315 | goto e_dst; |
| 1316 | } |
| 1317 | |
| 1318 | /* ...but we only need AES_BLOCK_SIZE bytes */ |
| 1319 | dm_offset = CCP_KSB_BYTES - AES_BLOCK_SIZE; |
| 1320 | ccp_get_dm_area(&ctx, dm_offset, xts->iv, 0, xts->iv_len); |
| 1321 | |
| 1322 | e_dst: |
| 1323 | if (!in_place) |
| 1324 | ccp_free_data(&dst, cmd_q); |
| 1325 | |
| 1326 | e_src: |
| 1327 | ccp_free_data(&src, cmd_q); |
| 1328 | |
| 1329 | e_ctx: |
| 1330 | ccp_dm_free(&ctx); |
| 1331 | |
| 1332 | e_key: |
| 1333 | ccp_dm_free(&key); |
| 1334 | |
| 1335 | return ret; |
| 1336 | } |
| 1337 | |
| 1338 | static int ccp_run_sha_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd) |
| 1339 | { |
| 1340 | struct ccp_sha_engine *sha = &cmd->u.sha; |
| 1341 | struct ccp_dm_workarea ctx; |
| 1342 | struct ccp_data src; |
| 1343 | struct ccp_op op; |
| 1344 | int ret; |
| 1345 | |
| 1346 | if (sha->ctx_len != CCP_SHA_CTXSIZE) |
| 1347 | return -EINVAL; |
| 1348 | |
| 1349 | if (!sha->ctx) |
| 1350 | return -EINVAL; |
| 1351 | |
| 1352 | if (!sha->final && (sha->src_len & (CCP_SHA_BLOCKSIZE - 1))) |
| 1353 | return -EINVAL; |
| 1354 | |
| 1355 | if (!sha->src_len) { |
| 1356 | const u8 *sha_zero; |
| 1357 | |
| 1358 | /* Not final, just return */ |
| 1359 | if (!sha->final) |
| 1360 | return 0; |
| 1361 | |
| 1362 | /* CCP can't do a zero length sha operation so the caller |
| 1363 | * must buffer the data. |
| 1364 | */ |
| 1365 | if (sha->msg_bits) |
| 1366 | return -EINVAL; |
| 1367 | |
LABBE Corentin | bdd7506 | 2015-12-17 13:45:41 +0100 | [diff] [blame] | 1368 | /* The CCP cannot perform zero-length sha operations so the |
| 1369 | * caller is required to buffer data for the final operation. |
| 1370 | * However, a sha operation for a message with a total length |
| 1371 | * of zero is valid so known values are required to supply |
| 1372 | * the result. |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 1373 | */ |
| 1374 | switch (sha->type) { |
| 1375 | case CCP_SHA_TYPE_1: |
LABBE Corentin | bdd7506 | 2015-12-17 13:45:41 +0100 | [diff] [blame] | 1376 | sha_zero = sha1_zero_message_hash; |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 1377 | break; |
| 1378 | case CCP_SHA_TYPE_224: |
LABBE Corentin | bdd7506 | 2015-12-17 13:45:41 +0100 | [diff] [blame] | 1379 | sha_zero = sha224_zero_message_hash; |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 1380 | break; |
| 1381 | case CCP_SHA_TYPE_256: |
LABBE Corentin | bdd7506 | 2015-12-17 13:45:41 +0100 | [diff] [blame] | 1382 | sha_zero = sha256_zero_message_hash; |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 1383 | break; |
| 1384 | default: |
| 1385 | return -EINVAL; |
| 1386 | } |
| 1387 | |
| 1388 | scatterwalk_map_and_copy((void *)sha_zero, sha->ctx, 0, |
| 1389 | sha->ctx_len, 1); |
| 1390 | |
| 1391 | return 0; |
| 1392 | } |
| 1393 | |
| 1394 | if (!sha->src) |
| 1395 | return -EINVAL; |
| 1396 | |
| 1397 | BUILD_BUG_ON(CCP_SHA_KSB_COUNT != 1); |
| 1398 | |
| 1399 | memset(&op, 0, sizeof(op)); |
| 1400 | op.cmd_q = cmd_q; |
| 1401 | op.jobid = ccp_gen_jobid(cmd_q->ccp); |
| 1402 | op.ksb_ctx = cmd_q->ksb_ctx; |
| 1403 | op.u.sha.type = sha->type; |
| 1404 | op.u.sha.msg_bits = sha->msg_bits; |
| 1405 | |
| 1406 | /* The SHA context fits in a single (32-byte) KSB entry and |
| 1407 | * must be in little endian format. Use the 256-bit byte swap |
| 1408 | * passthru option to convert from big endian to little endian. |
| 1409 | */ |
| 1410 | ret = ccp_init_dm_workarea(&ctx, cmd_q, |
| 1411 | CCP_SHA_KSB_COUNT * CCP_KSB_BYTES, |
| 1412 | DMA_BIDIRECTIONAL); |
| 1413 | if (ret) |
| 1414 | return ret; |
| 1415 | |
Tom Lendacky | c11baa0 | 2014-01-24 16:18:02 -0600 | [diff] [blame] | 1416 | if (sha->first) { |
| 1417 | const __be32 *init; |
| 1418 | |
| 1419 | switch (sha->type) { |
| 1420 | case CCP_SHA_TYPE_1: |
| 1421 | init = ccp_sha1_init; |
| 1422 | break; |
| 1423 | case CCP_SHA_TYPE_224: |
| 1424 | init = ccp_sha224_init; |
| 1425 | break; |
| 1426 | case CCP_SHA_TYPE_256: |
| 1427 | init = ccp_sha256_init; |
| 1428 | break; |
| 1429 | default: |
| 1430 | ret = -EINVAL; |
| 1431 | goto e_ctx; |
| 1432 | } |
| 1433 | memcpy(ctx.address, init, CCP_SHA_CTXSIZE); |
Tom Lendacky | 8db8846 | 2015-02-03 13:07:05 -0600 | [diff] [blame] | 1434 | } else { |
Tom Lendacky | c11baa0 | 2014-01-24 16:18:02 -0600 | [diff] [blame] | 1435 | ccp_set_dm_area(&ctx, 0, sha->ctx, 0, sha->ctx_len); |
Tom Lendacky | 8db8846 | 2015-02-03 13:07:05 -0600 | [diff] [blame] | 1436 | } |
Tom Lendacky | c11baa0 | 2014-01-24 16:18:02 -0600 | [diff] [blame] | 1437 | |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 1438 | ret = ccp_copy_to_ksb(cmd_q, &ctx, op.jobid, op.ksb_ctx, |
| 1439 | CCP_PASSTHRU_BYTESWAP_256BIT); |
| 1440 | if (ret) { |
| 1441 | cmd->engine_error = cmd_q->cmd_error; |
| 1442 | goto e_ctx; |
| 1443 | } |
| 1444 | |
| 1445 | /* Send data to the CCP SHA engine */ |
| 1446 | ret = ccp_init_data(&src, cmd_q, sha->src, sha->src_len, |
| 1447 | CCP_SHA_BLOCKSIZE, DMA_TO_DEVICE); |
| 1448 | if (ret) |
| 1449 | goto e_ctx; |
| 1450 | |
| 1451 | while (src.sg_wa.bytes_left) { |
| 1452 | ccp_prepare_data(&src, NULL, &op, CCP_SHA_BLOCKSIZE, false); |
| 1453 | if (sha->final && !src.sg_wa.bytes_left) |
| 1454 | op.eom = 1; |
| 1455 | |
| 1456 | ret = ccp_perform_sha(&op); |
| 1457 | if (ret) { |
| 1458 | cmd->engine_error = cmd_q->cmd_error; |
| 1459 | goto e_data; |
| 1460 | } |
| 1461 | |
| 1462 | ccp_process_data(&src, NULL, &op); |
| 1463 | } |
| 1464 | |
| 1465 | /* Retrieve the SHA context - convert from LE to BE using |
| 1466 | * 32-byte (256-bit) byteswapping to BE |
| 1467 | */ |
| 1468 | ret = ccp_copy_from_ksb(cmd_q, &ctx, op.jobid, op.ksb_ctx, |
| 1469 | CCP_PASSTHRU_BYTESWAP_256BIT); |
| 1470 | if (ret) { |
| 1471 | cmd->engine_error = cmd_q->cmd_error; |
| 1472 | goto e_data; |
| 1473 | } |
| 1474 | |
| 1475 | ccp_get_dm_area(&ctx, 0, sha->ctx, 0, sha->ctx_len); |
| 1476 | |
Tom Lendacky | c11baa0 | 2014-01-24 16:18:02 -0600 | [diff] [blame] | 1477 | if (sha->final && sha->opad) { |
| 1478 | /* HMAC operation, recursively perform final SHA */ |
| 1479 | struct ccp_cmd hmac_cmd; |
| 1480 | struct scatterlist sg; |
| 1481 | u64 block_size, digest_size; |
| 1482 | u8 *hmac_buf; |
| 1483 | |
| 1484 | switch (sha->type) { |
| 1485 | case CCP_SHA_TYPE_1: |
| 1486 | block_size = SHA1_BLOCK_SIZE; |
| 1487 | digest_size = SHA1_DIGEST_SIZE; |
| 1488 | break; |
| 1489 | case CCP_SHA_TYPE_224: |
| 1490 | block_size = SHA224_BLOCK_SIZE; |
| 1491 | digest_size = SHA224_DIGEST_SIZE; |
| 1492 | break; |
| 1493 | case CCP_SHA_TYPE_256: |
| 1494 | block_size = SHA256_BLOCK_SIZE; |
| 1495 | digest_size = SHA256_DIGEST_SIZE; |
| 1496 | break; |
| 1497 | default: |
| 1498 | ret = -EINVAL; |
| 1499 | goto e_data; |
| 1500 | } |
| 1501 | |
| 1502 | if (sha->opad_len != block_size) { |
| 1503 | ret = -EINVAL; |
| 1504 | goto e_data; |
| 1505 | } |
| 1506 | |
| 1507 | hmac_buf = kmalloc(block_size + digest_size, GFP_KERNEL); |
| 1508 | if (!hmac_buf) { |
| 1509 | ret = -ENOMEM; |
| 1510 | goto e_data; |
| 1511 | } |
| 1512 | sg_init_one(&sg, hmac_buf, block_size + digest_size); |
| 1513 | |
| 1514 | scatterwalk_map_and_copy(hmac_buf, sha->opad, 0, block_size, 0); |
| 1515 | memcpy(hmac_buf + block_size, ctx.address, digest_size); |
| 1516 | |
| 1517 | memset(&hmac_cmd, 0, sizeof(hmac_cmd)); |
| 1518 | hmac_cmd.engine = CCP_ENGINE_SHA; |
| 1519 | hmac_cmd.u.sha.type = sha->type; |
| 1520 | hmac_cmd.u.sha.ctx = sha->ctx; |
| 1521 | hmac_cmd.u.sha.ctx_len = sha->ctx_len; |
| 1522 | hmac_cmd.u.sha.src = &sg; |
| 1523 | hmac_cmd.u.sha.src_len = block_size + digest_size; |
| 1524 | hmac_cmd.u.sha.opad = NULL; |
| 1525 | hmac_cmd.u.sha.opad_len = 0; |
| 1526 | hmac_cmd.u.sha.first = 1; |
| 1527 | hmac_cmd.u.sha.final = 1; |
| 1528 | hmac_cmd.u.sha.msg_bits = (block_size + digest_size) << 3; |
| 1529 | |
| 1530 | ret = ccp_run_sha_cmd(cmd_q, &hmac_cmd); |
| 1531 | if (ret) |
| 1532 | cmd->engine_error = hmac_cmd.engine_error; |
| 1533 | |
| 1534 | kfree(hmac_buf); |
| 1535 | } |
| 1536 | |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 1537 | e_data: |
| 1538 | ccp_free_data(&src, cmd_q); |
| 1539 | |
| 1540 | e_ctx: |
| 1541 | ccp_dm_free(&ctx); |
| 1542 | |
| 1543 | return ret; |
| 1544 | } |
| 1545 | |
| 1546 | static int ccp_run_rsa_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd) |
| 1547 | { |
| 1548 | struct ccp_rsa_engine *rsa = &cmd->u.rsa; |
| 1549 | struct ccp_dm_workarea exp, src; |
| 1550 | struct ccp_data dst; |
| 1551 | struct ccp_op op; |
| 1552 | unsigned int ksb_count, i_len, o_len; |
| 1553 | int ret; |
| 1554 | |
| 1555 | if (rsa->key_size > CCP_RSA_MAX_WIDTH) |
| 1556 | return -EINVAL; |
| 1557 | |
| 1558 | if (!rsa->exp || !rsa->mod || !rsa->src || !rsa->dst) |
| 1559 | return -EINVAL; |
| 1560 | |
| 1561 | /* The RSA modulus must precede the message being acted upon, so |
| 1562 | * it must be copied to a DMA area where the message and the |
| 1563 | * modulus can be concatenated. Therefore the input buffer |
| 1564 | * length required is twice the output buffer length (which |
| 1565 | * must be a multiple of 256-bits). |
| 1566 | */ |
| 1567 | o_len = ((rsa->key_size + 255) / 256) * 32; |
| 1568 | i_len = o_len * 2; |
| 1569 | |
| 1570 | ksb_count = o_len / CCP_KSB_BYTES; |
| 1571 | |
| 1572 | memset(&op, 0, sizeof(op)); |
| 1573 | op.cmd_q = cmd_q; |
| 1574 | op.jobid = ccp_gen_jobid(cmd_q->ccp); |
| 1575 | op.ksb_key = ccp_alloc_ksb(cmd_q->ccp, ksb_count); |
| 1576 | if (!op.ksb_key) |
| 1577 | return -EIO; |
| 1578 | |
| 1579 | /* The RSA exponent may span multiple (32-byte) KSB entries and must |
| 1580 | * be in little endian format. Reverse copy each 32-byte chunk |
| 1581 | * of the exponent (En chunk to E0 chunk, E(n-1) chunk to E1 chunk) |
| 1582 | * and each byte within that chunk and do not perform any byte swap |
| 1583 | * operations on the passthru operation. |
| 1584 | */ |
| 1585 | ret = ccp_init_dm_workarea(&exp, cmd_q, o_len, DMA_TO_DEVICE); |
| 1586 | if (ret) |
| 1587 | goto e_ksb; |
| 1588 | |
Tom Lendacky | 355eba5 | 2015-10-01 16:32:31 -0500 | [diff] [blame] | 1589 | ret = ccp_reverse_set_dm_area(&exp, rsa->exp, rsa->exp_len, |
| 1590 | CCP_KSB_BYTES, false); |
| 1591 | if (ret) |
| 1592 | goto e_exp; |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 1593 | ret = ccp_copy_to_ksb(cmd_q, &exp, op.jobid, op.ksb_key, |
| 1594 | CCP_PASSTHRU_BYTESWAP_NOOP); |
| 1595 | if (ret) { |
| 1596 | cmd->engine_error = cmd_q->cmd_error; |
| 1597 | goto e_exp; |
| 1598 | } |
| 1599 | |
| 1600 | /* Concatenate the modulus and the message. Both the modulus and |
| 1601 | * the operands must be in little endian format. Since the input |
| 1602 | * is in big endian format it must be converted. |
| 1603 | */ |
| 1604 | ret = ccp_init_dm_workarea(&src, cmd_q, i_len, DMA_TO_DEVICE); |
| 1605 | if (ret) |
| 1606 | goto e_exp; |
| 1607 | |
Tom Lendacky | 355eba5 | 2015-10-01 16:32:31 -0500 | [diff] [blame] | 1608 | ret = ccp_reverse_set_dm_area(&src, rsa->mod, rsa->mod_len, |
| 1609 | CCP_KSB_BYTES, false); |
| 1610 | if (ret) |
| 1611 | goto e_src; |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 1612 | src.address += o_len; /* Adjust the address for the copy operation */ |
Tom Lendacky | 355eba5 | 2015-10-01 16:32:31 -0500 | [diff] [blame] | 1613 | ret = ccp_reverse_set_dm_area(&src, rsa->src, rsa->src_len, |
| 1614 | CCP_KSB_BYTES, false); |
| 1615 | if (ret) |
| 1616 | goto e_src; |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 1617 | src.address -= o_len; /* Reset the address to original value */ |
| 1618 | |
| 1619 | /* Prepare the output area for the operation */ |
| 1620 | ret = ccp_init_data(&dst, cmd_q, rsa->dst, rsa->mod_len, |
| 1621 | o_len, DMA_FROM_DEVICE); |
| 1622 | if (ret) |
| 1623 | goto e_src; |
| 1624 | |
| 1625 | op.soc = 1; |
| 1626 | op.src.u.dma.address = src.dma.address; |
| 1627 | op.src.u.dma.offset = 0; |
| 1628 | op.src.u.dma.length = i_len; |
| 1629 | op.dst.u.dma.address = dst.dm_wa.dma.address; |
| 1630 | op.dst.u.dma.offset = 0; |
| 1631 | op.dst.u.dma.length = o_len; |
| 1632 | |
| 1633 | op.u.rsa.mod_size = rsa->key_size; |
| 1634 | op.u.rsa.input_len = i_len; |
| 1635 | |
| 1636 | ret = ccp_perform_rsa(&op); |
| 1637 | if (ret) { |
| 1638 | cmd->engine_error = cmd_q->cmd_error; |
| 1639 | goto e_dst; |
| 1640 | } |
| 1641 | |
| 1642 | ccp_reverse_get_dm_area(&dst.dm_wa, rsa->dst, rsa->mod_len); |
| 1643 | |
| 1644 | e_dst: |
| 1645 | ccp_free_data(&dst, cmd_q); |
| 1646 | |
| 1647 | e_src: |
| 1648 | ccp_dm_free(&src); |
| 1649 | |
| 1650 | e_exp: |
| 1651 | ccp_dm_free(&exp); |
| 1652 | |
| 1653 | e_ksb: |
| 1654 | ccp_free_ksb(cmd_q->ccp, op.ksb_key, ksb_count); |
| 1655 | |
| 1656 | return ret; |
| 1657 | } |
| 1658 | |
| 1659 | static int ccp_run_passthru_cmd(struct ccp_cmd_queue *cmd_q, |
| 1660 | struct ccp_cmd *cmd) |
| 1661 | { |
| 1662 | struct ccp_passthru_engine *pt = &cmd->u.passthru; |
| 1663 | struct ccp_dm_workarea mask; |
| 1664 | struct ccp_data src, dst; |
| 1665 | struct ccp_op op; |
| 1666 | bool in_place = false; |
| 1667 | unsigned int i; |
| 1668 | int ret; |
| 1669 | |
| 1670 | if (!pt->final && (pt->src_len & (CCP_PASSTHRU_BLOCKSIZE - 1))) |
| 1671 | return -EINVAL; |
| 1672 | |
| 1673 | if (!pt->src || !pt->dst) |
| 1674 | return -EINVAL; |
| 1675 | |
| 1676 | if (pt->bit_mod != CCP_PASSTHRU_BITWISE_NOOP) { |
| 1677 | if (pt->mask_len != CCP_PASSTHRU_MASKSIZE) |
| 1678 | return -EINVAL; |
| 1679 | if (!pt->mask) |
| 1680 | return -EINVAL; |
| 1681 | } |
| 1682 | |
| 1683 | BUILD_BUG_ON(CCP_PASSTHRU_KSB_COUNT != 1); |
| 1684 | |
| 1685 | memset(&op, 0, sizeof(op)); |
| 1686 | op.cmd_q = cmd_q; |
| 1687 | op.jobid = ccp_gen_jobid(cmd_q->ccp); |
| 1688 | |
| 1689 | if (pt->bit_mod != CCP_PASSTHRU_BITWISE_NOOP) { |
| 1690 | /* Load the mask */ |
| 1691 | op.ksb_key = cmd_q->ksb_key; |
| 1692 | |
| 1693 | ret = ccp_init_dm_workarea(&mask, cmd_q, |
| 1694 | CCP_PASSTHRU_KSB_COUNT * |
| 1695 | CCP_KSB_BYTES, |
| 1696 | DMA_TO_DEVICE); |
| 1697 | if (ret) |
| 1698 | return ret; |
| 1699 | |
| 1700 | ccp_set_dm_area(&mask, 0, pt->mask, 0, pt->mask_len); |
| 1701 | ret = ccp_copy_to_ksb(cmd_q, &mask, op.jobid, op.ksb_key, |
| 1702 | CCP_PASSTHRU_BYTESWAP_NOOP); |
| 1703 | if (ret) { |
| 1704 | cmd->engine_error = cmd_q->cmd_error; |
| 1705 | goto e_mask; |
| 1706 | } |
| 1707 | } |
| 1708 | |
| 1709 | /* Prepare the input and output data workareas. For in-place |
| 1710 | * operations we need to set the dma direction to BIDIRECTIONAL |
| 1711 | * and copy the src workarea to the dst workarea. |
| 1712 | */ |
| 1713 | if (sg_virt(pt->src) == sg_virt(pt->dst)) |
| 1714 | in_place = true; |
| 1715 | |
| 1716 | ret = ccp_init_data(&src, cmd_q, pt->src, pt->src_len, |
| 1717 | CCP_PASSTHRU_MASKSIZE, |
| 1718 | in_place ? DMA_BIDIRECTIONAL : DMA_TO_DEVICE); |
| 1719 | if (ret) |
| 1720 | goto e_mask; |
| 1721 | |
Tom Lendacky | 8db8846 | 2015-02-03 13:07:05 -0600 | [diff] [blame] | 1722 | if (in_place) { |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 1723 | dst = src; |
Tom Lendacky | 8db8846 | 2015-02-03 13:07:05 -0600 | [diff] [blame] | 1724 | } else { |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 1725 | ret = ccp_init_data(&dst, cmd_q, pt->dst, pt->src_len, |
| 1726 | CCP_PASSTHRU_MASKSIZE, DMA_FROM_DEVICE); |
| 1727 | if (ret) |
| 1728 | goto e_src; |
| 1729 | } |
| 1730 | |
| 1731 | /* Send data to the CCP Passthru engine |
| 1732 | * Because the CCP engine works on a single source and destination |
| 1733 | * dma address at a time, each entry in the source scatterlist |
| 1734 | * (after the dma_map_sg call) must be less than or equal to the |
| 1735 | * (remaining) length in the destination scatterlist entry and the |
| 1736 | * length must be a multiple of CCP_PASSTHRU_BLOCKSIZE |
| 1737 | */ |
| 1738 | dst.sg_wa.sg_used = 0; |
| 1739 | for (i = 1; i <= src.sg_wa.dma_count; i++) { |
| 1740 | if (!dst.sg_wa.sg || |
| 1741 | (dst.sg_wa.sg->length < src.sg_wa.sg->length)) { |
| 1742 | ret = -EINVAL; |
| 1743 | goto e_dst; |
| 1744 | } |
| 1745 | |
| 1746 | if (i == src.sg_wa.dma_count) { |
| 1747 | op.eom = 1; |
| 1748 | op.soc = 1; |
| 1749 | } |
| 1750 | |
| 1751 | op.src.type = CCP_MEMTYPE_SYSTEM; |
| 1752 | op.src.u.dma.address = sg_dma_address(src.sg_wa.sg); |
| 1753 | op.src.u.dma.offset = 0; |
| 1754 | op.src.u.dma.length = sg_dma_len(src.sg_wa.sg); |
| 1755 | |
| 1756 | op.dst.type = CCP_MEMTYPE_SYSTEM; |
| 1757 | op.dst.u.dma.address = sg_dma_address(dst.sg_wa.sg); |
Dave Jones | 80e84c1 | 2014-02-09 09:59:14 +0800 | [diff] [blame] | 1758 | op.dst.u.dma.offset = dst.sg_wa.sg_used; |
| 1759 | op.dst.u.dma.length = op.src.u.dma.length; |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 1760 | |
| 1761 | ret = ccp_perform_passthru(&op); |
| 1762 | if (ret) { |
| 1763 | cmd->engine_error = cmd_q->cmd_error; |
| 1764 | goto e_dst; |
| 1765 | } |
| 1766 | |
| 1767 | dst.sg_wa.sg_used += src.sg_wa.sg->length; |
| 1768 | if (dst.sg_wa.sg_used == dst.sg_wa.sg->length) { |
| 1769 | dst.sg_wa.sg = sg_next(dst.sg_wa.sg); |
| 1770 | dst.sg_wa.sg_used = 0; |
| 1771 | } |
| 1772 | src.sg_wa.sg = sg_next(src.sg_wa.sg); |
| 1773 | } |
| 1774 | |
| 1775 | e_dst: |
| 1776 | if (!in_place) |
| 1777 | ccp_free_data(&dst, cmd_q); |
| 1778 | |
| 1779 | e_src: |
| 1780 | ccp_free_data(&src, cmd_q); |
| 1781 | |
| 1782 | e_mask: |
| 1783 | if (pt->bit_mod != CCP_PASSTHRU_BITWISE_NOOP) |
| 1784 | ccp_dm_free(&mask); |
| 1785 | |
| 1786 | return ret; |
| 1787 | } |
| 1788 | |
| 1789 | static int ccp_run_ecc_mm_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd) |
| 1790 | { |
| 1791 | struct ccp_ecc_engine *ecc = &cmd->u.ecc; |
| 1792 | struct ccp_dm_workarea src, dst; |
| 1793 | struct ccp_op op; |
| 1794 | int ret; |
| 1795 | u8 *save; |
| 1796 | |
| 1797 | if (!ecc->u.mm.operand_1 || |
| 1798 | (ecc->u.mm.operand_1_len > CCP_ECC_MODULUS_BYTES)) |
| 1799 | return -EINVAL; |
| 1800 | |
| 1801 | if (ecc->function != CCP_ECC_FUNCTION_MINV_384BIT) |
| 1802 | if (!ecc->u.mm.operand_2 || |
| 1803 | (ecc->u.mm.operand_2_len > CCP_ECC_MODULUS_BYTES)) |
| 1804 | return -EINVAL; |
| 1805 | |
| 1806 | if (!ecc->u.mm.result || |
| 1807 | (ecc->u.mm.result_len < CCP_ECC_MODULUS_BYTES)) |
| 1808 | return -EINVAL; |
| 1809 | |
| 1810 | memset(&op, 0, sizeof(op)); |
| 1811 | op.cmd_q = cmd_q; |
| 1812 | op.jobid = ccp_gen_jobid(cmd_q->ccp); |
| 1813 | |
| 1814 | /* Concatenate the modulus and the operands. Both the modulus and |
| 1815 | * the operands must be in little endian format. Since the input |
| 1816 | * is in big endian format it must be converted and placed in a |
| 1817 | * fixed length buffer. |
| 1818 | */ |
| 1819 | ret = ccp_init_dm_workarea(&src, cmd_q, CCP_ECC_SRC_BUF_SIZE, |
| 1820 | DMA_TO_DEVICE); |
| 1821 | if (ret) |
| 1822 | return ret; |
| 1823 | |
| 1824 | /* Save the workarea address since it is updated in order to perform |
| 1825 | * the concatenation |
| 1826 | */ |
| 1827 | save = src.address; |
| 1828 | |
| 1829 | /* Copy the ECC modulus */ |
Tom Lendacky | 355eba5 | 2015-10-01 16:32:31 -0500 | [diff] [blame] | 1830 | ret = ccp_reverse_set_dm_area(&src, ecc->mod, ecc->mod_len, |
| 1831 | CCP_ECC_OPERAND_SIZE, false); |
| 1832 | if (ret) |
| 1833 | goto e_src; |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 1834 | src.address += CCP_ECC_OPERAND_SIZE; |
| 1835 | |
| 1836 | /* Copy the first operand */ |
Tom Lendacky | 355eba5 | 2015-10-01 16:32:31 -0500 | [diff] [blame] | 1837 | ret = ccp_reverse_set_dm_area(&src, ecc->u.mm.operand_1, |
| 1838 | ecc->u.mm.operand_1_len, |
| 1839 | CCP_ECC_OPERAND_SIZE, false); |
| 1840 | if (ret) |
| 1841 | goto e_src; |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 1842 | src.address += CCP_ECC_OPERAND_SIZE; |
| 1843 | |
| 1844 | if (ecc->function != CCP_ECC_FUNCTION_MINV_384BIT) { |
| 1845 | /* Copy the second operand */ |
Tom Lendacky | 355eba5 | 2015-10-01 16:32:31 -0500 | [diff] [blame] | 1846 | ret = ccp_reverse_set_dm_area(&src, ecc->u.mm.operand_2, |
| 1847 | ecc->u.mm.operand_2_len, |
| 1848 | CCP_ECC_OPERAND_SIZE, false); |
| 1849 | if (ret) |
| 1850 | goto e_src; |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 1851 | src.address += CCP_ECC_OPERAND_SIZE; |
| 1852 | } |
| 1853 | |
| 1854 | /* Restore the workarea address */ |
| 1855 | src.address = save; |
| 1856 | |
| 1857 | /* Prepare the output area for the operation */ |
| 1858 | ret = ccp_init_dm_workarea(&dst, cmd_q, CCP_ECC_DST_BUF_SIZE, |
| 1859 | DMA_FROM_DEVICE); |
| 1860 | if (ret) |
| 1861 | goto e_src; |
| 1862 | |
| 1863 | op.soc = 1; |
| 1864 | op.src.u.dma.address = src.dma.address; |
| 1865 | op.src.u.dma.offset = 0; |
| 1866 | op.src.u.dma.length = src.length; |
| 1867 | op.dst.u.dma.address = dst.dma.address; |
| 1868 | op.dst.u.dma.offset = 0; |
| 1869 | op.dst.u.dma.length = dst.length; |
| 1870 | |
| 1871 | op.u.ecc.function = cmd->u.ecc.function; |
| 1872 | |
| 1873 | ret = ccp_perform_ecc(&op); |
| 1874 | if (ret) { |
| 1875 | cmd->engine_error = cmd_q->cmd_error; |
| 1876 | goto e_dst; |
| 1877 | } |
| 1878 | |
| 1879 | ecc->ecc_result = le16_to_cpup( |
| 1880 | (const __le16 *)(dst.address + CCP_ECC_RESULT_OFFSET)); |
| 1881 | if (!(ecc->ecc_result & CCP_ECC_RESULT_SUCCESS)) { |
| 1882 | ret = -EIO; |
| 1883 | goto e_dst; |
| 1884 | } |
| 1885 | |
| 1886 | /* Save the ECC result */ |
| 1887 | ccp_reverse_get_dm_area(&dst, ecc->u.mm.result, CCP_ECC_MODULUS_BYTES); |
| 1888 | |
| 1889 | e_dst: |
| 1890 | ccp_dm_free(&dst); |
| 1891 | |
| 1892 | e_src: |
| 1893 | ccp_dm_free(&src); |
| 1894 | |
| 1895 | return ret; |
| 1896 | } |
| 1897 | |
| 1898 | static int ccp_run_ecc_pm_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd) |
| 1899 | { |
| 1900 | struct ccp_ecc_engine *ecc = &cmd->u.ecc; |
| 1901 | struct ccp_dm_workarea src, dst; |
| 1902 | struct ccp_op op; |
| 1903 | int ret; |
| 1904 | u8 *save; |
| 1905 | |
| 1906 | if (!ecc->u.pm.point_1.x || |
| 1907 | (ecc->u.pm.point_1.x_len > CCP_ECC_MODULUS_BYTES) || |
| 1908 | !ecc->u.pm.point_1.y || |
| 1909 | (ecc->u.pm.point_1.y_len > CCP_ECC_MODULUS_BYTES)) |
| 1910 | return -EINVAL; |
| 1911 | |
| 1912 | if (ecc->function == CCP_ECC_FUNCTION_PADD_384BIT) { |
| 1913 | if (!ecc->u.pm.point_2.x || |
| 1914 | (ecc->u.pm.point_2.x_len > CCP_ECC_MODULUS_BYTES) || |
| 1915 | !ecc->u.pm.point_2.y || |
| 1916 | (ecc->u.pm.point_2.y_len > CCP_ECC_MODULUS_BYTES)) |
| 1917 | return -EINVAL; |
| 1918 | } else { |
| 1919 | if (!ecc->u.pm.domain_a || |
| 1920 | (ecc->u.pm.domain_a_len > CCP_ECC_MODULUS_BYTES)) |
| 1921 | return -EINVAL; |
| 1922 | |
| 1923 | if (ecc->function == CCP_ECC_FUNCTION_PMUL_384BIT) |
| 1924 | if (!ecc->u.pm.scalar || |
| 1925 | (ecc->u.pm.scalar_len > CCP_ECC_MODULUS_BYTES)) |
| 1926 | return -EINVAL; |
| 1927 | } |
| 1928 | |
| 1929 | if (!ecc->u.pm.result.x || |
| 1930 | (ecc->u.pm.result.x_len < CCP_ECC_MODULUS_BYTES) || |
| 1931 | !ecc->u.pm.result.y || |
| 1932 | (ecc->u.pm.result.y_len < CCP_ECC_MODULUS_BYTES)) |
| 1933 | return -EINVAL; |
| 1934 | |
| 1935 | memset(&op, 0, sizeof(op)); |
| 1936 | op.cmd_q = cmd_q; |
| 1937 | op.jobid = ccp_gen_jobid(cmd_q->ccp); |
| 1938 | |
| 1939 | /* Concatenate the modulus and the operands. Both the modulus and |
| 1940 | * the operands must be in little endian format. Since the input |
| 1941 | * is in big endian format it must be converted and placed in a |
| 1942 | * fixed length buffer. |
| 1943 | */ |
| 1944 | ret = ccp_init_dm_workarea(&src, cmd_q, CCP_ECC_SRC_BUF_SIZE, |
| 1945 | DMA_TO_DEVICE); |
| 1946 | if (ret) |
| 1947 | return ret; |
| 1948 | |
| 1949 | /* Save the workarea address since it is updated in order to perform |
| 1950 | * the concatenation |
| 1951 | */ |
| 1952 | save = src.address; |
| 1953 | |
| 1954 | /* Copy the ECC modulus */ |
Tom Lendacky | 355eba5 | 2015-10-01 16:32:31 -0500 | [diff] [blame] | 1955 | ret = ccp_reverse_set_dm_area(&src, ecc->mod, ecc->mod_len, |
| 1956 | CCP_ECC_OPERAND_SIZE, false); |
| 1957 | if (ret) |
| 1958 | goto e_src; |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 1959 | src.address += CCP_ECC_OPERAND_SIZE; |
| 1960 | |
| 1961 | /* Copy the first point X and Y coordinate */ |
Tom Lendacky | 355eba5 | 2015-10-01 16:32:31 -0500 | [diff] [blame] | 1962 | ret = ccp_reverse_set_dm_area(&src, ecc->u.pm.point_1.x, |
| 1963 | ecc->u.pm.point_1.x_len, |
| 1964 | CCP_ECC_OPERAND_SIZE, false); |
| 1965 | if (ret) |
| 1966 | goto e_src; |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 1967 | src.address += CCP_ECC_OPERAND_SIZE; |
Tom Lendacky | 355eba5 | 2015-10-01 16:32:31 -0500 | [diff] [blame] | 1968 | ret = ccp_reverse_set_dm_area(&src, ecc->u.pm.point_1.y, |
| 1969 | ecc->u.pm.point_1.y_len, |
| 1970 | CCP_ECC_OPERAND_SIZE, false); |
| 1971 | if (ret) |
| 1972 | goto e_src; |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 1973 | src.address += CCP_ECC_OPERAND_SIZE; |
| 1974 | |
| 1975 | /* Set the first point Z coordianate to 1 */ |
Tom Lendacky | 8db8846 | 2015-02-03 13:07:05 -0600 | [diff] [blame] | 1976 | *src.address = 0x01; |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 1977 | src.address += CCP_ECC_OPERAND_SIZE; |
| 1978 | |
| 1979 | if (ecc->function == CCP_ECC_FUNCTION_PADD_384BIT) { |
| 1980 | /* Copy the second point X and Y coordinate */ |
Tom Lendacky | 355eba5 | 2015-10-01 16:32:31 -0500 | [diff] [blame] | 1981 | ret = ccp_reverse_set_dm_area(&src, ecc->u.pm.point_2.x, |
| 1982 | ecc->u.pm.point_2.x_len, |
| 1983 | CCP_ECC_OPERAND_SIZE, false); |
| 1984 | if (ret) |
| 1985 | goto e_src; |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 1986 | src.address += CCP_ECC_OPERAND_SIZE; |
Tom Lendacky | 355eba5 | 2015-10-01 16:32:31 -0500 | [diff] [blame] | 1987 | ret = ccp_reverse_set_dm_area(&src, ecc->u.pm.point_2.y, |
| 1988 | ecc->u.pm.point_2.y_len, |
| 1989 | CCP_ECC_OPERAND_SIZE, false); |
| 1990 | if (ret) |
| 1991 | goto e_src; |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 1992 | src.address += CCP_ECC_OPERAND_SIZE; |
| 1993 | |
| 1994 | /* Set the second point Z coordianate to 1 */ |
Tom Lendacky | 8db8846 | 2015-02-03 13:07:05 -0600 | [diff] [blame] | 1995 | *src.address = 0x01; |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 1996 | src.address += CCP_ECC_OPERAND_SIZE; |
| 1997 | } else { |
| 1998 | /* Copy the Domain "a" parameter */ |
Tom Lendacky | 355eba5 | 2015-10-01 16:32:31 -0500 | [diff] [blame] | 1999 | ret = ccp_reverse_set_dm_area(&src, ecc->u.pm.domain_a, |
| 2000 | ecc->u.pm.domain_a_len, |
| 2001 | CCP_ECC_OPERAND_SIZE, false); |
| 2002 | if (ret) |
| 2003 | goto e_src; |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 2004 | src.address += CCP_ECC_OPERAND_SIZE; |
| 2005 | |
| 2006 | if (ecc->function == CCP_ECC_FUNCTION_PMUL_384BIT) { |
| 2007 | /* Copy the scalar value */ |
Tom Lendacky | 355eba5 | 2015-10-01 16:32:31 -0500 | [diff] [blame] | 2008 | ret = ccp_reverse_set_dm_area(&src, ecc->u.pm.scalar, |
| 2009 | ecc->u.pm.scalar_len, |
| 2010 | CCP_ECC_OPERAND_SIZE, |
| 2011 | false); |
| 2012 | if (ret) |
| 2013 | goto e_src; |
Tom Lendacky | 63b94509 | 2013-11-12 11:46:16 -0600 | [diff] [blame] | 2014 | src.address += CCP_ECC_OPERAND_SIZE; |
| 2015 | } |
| 2016 | } |
| 2017 | |
| 2018 | /* Restore the workarea address */ |
| 2019 | src.address = save; |
| 2020 | |
| 2021 | /* Prepare the output area for the operation */ |
| 2022 | ret = ccp_init_dm_workarea(&dst, cmd_q, CCP_ECC_DST_BUF_SIZE, |
| 2023 | DMA_FROM_DEVICE); |
| 2024 | if (ret) |
| 2025 | goto e_src; |
| 2026 | |
| 2027 | op.soc = 1; |
| 2028 | op.src.u.dma.address = src.dma.address; |
| 2029 | op.src.u.dma.offset = 0; |
| 2030 | op.src.u.dma.length = src.length; |
| 2031 | op.dst.u.dma.address = dst.dma.address; |
| 2032 | op.dst.u.dma.offset = 0; |
| 2033 | op.dst.u.dma.length = dst.length; |
| 2034 | |
| 2035 | op.u.ecc.function = cmd->u.ecc.function; |
| 2036 | |
| 2037 | ret = ccp_perform_ecc(&op); |
| 2038 | if (ret) { |
| 2039 | cmd->engine_error = cmd_q->cmd_error; |
| 2040 | goto e_dst; |
| 2041 | } |
| 2042 | |
| 2043 | ecc->ecc_result = le16_to_cpup( |
| 2044 | (const __le16 *)(dst.address + CCP_ECC_RESULT_OFFSET)); |
| 2045 | if (!(ecc->ecc_result & CCP_ECC_RESULT_SUCCESS)) { |
| 2046 | ret = -EIO; |
| 2047 | goto e_dst; |
| 2048 | } |
| 2049 | |
| 2050 | /* Save the workarea address since it is updated as we walk through |
| 2051 | * to copy the point math result |
| 2052 | */ |
| 2053 | save = dst.address; |
| 2054 | |
| 2055 | /* Save the ECC result X and Y coordinates */ |
| 2056 | ccp_reverse_get_dm_area(&dst, ecc->u.pm.result.x, |
| 2057 | CCP_ECC_MODULUS_BYTES); |
| 2058 | dst.address += CCP_ECC_OUTPUT_SIZE; |
| 2059 | ccp_reverse_get_dm_area(&dst, ecc->u.pm.result.y, |
| 2060 | CCP_ECC_MODULUS_BYTES); |
| 2061 | dst.address += CCP_ECC_OUTPUT_SIZE; |
| 2062 | |
| 2063 | /* Restore the workarea address */ |
| 2064 | dst.address = save; |
| 2065 | |
| 2066 | e_dst: |
| 2067 | ccp_dm_free(&dst); |
| 2068 | |
| 2069 | e_src: |
| 2070 | ccp_dm_free(&src); |
| 2071 | |
| 2072 | return ret; |
| 2073 | } |
| 2074 | |
| 2075 | static int ccp_run_ecc_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd) |
| 2076 | { |
| 2077 | struct ccp_ecc_engine *ecc = &cmd->u.ecc; |
| 2078 | |
| 2079 | ecc->ecc_result = 0; |
| 2080 | |
| 2081 | if (!ecc->mod || |
| 2082 | (ecc->mod_len > CCP_ECC_MODULUS_BYTES)) |
| 2083 | return -EINVAL; |
| 2084 | |
| 2085 | switch (ecc->function) { |
| 2086 | case CCP_ECC_FUNCTION_MMUL_384BIT: |
| 2087 | case CCP_ECC_FUNCTION_MADD_384BIT: |
| 2088 | case CCP_ECC_FUNCTION_MINV_384BIT: |
| 2089 | return ccp_run_ecc_mm_cmd(cmd_q, cmd); |
| 2090 | |
| 2091 | case CCP_ECC_FUNCTION_PADD_384BIT: |
| 2092 | case CCP_ECC_FUNCTION_PMUL_384BIT: |
| 2093 | case CCP_ECC_FUNCTION_PDBL_384BIT: |
| 2094 | return ccp_run_ecc_pm_cmd(cmd_q, cmd); |
| 2095 | |
| 2096 | default: |
| 2097 | return -EINVAL; |
| 2098 | } |
| 2099 | } |
| 2100 | |
| 2101 | int ccp_run_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd) |
| 2102 | { |
| 2103 | int ret; |
| 2104 | |
| 2105 | cmd->engine_error = 0; |
| 2106 | cmd_q->cmd_error = 0; |
| 2107 | cmd_q->int_rcvd = 0; |
| 2108 | cmd_q->free_slots = CMD_Q_DEPTH(ioread32(cmd_q->reg_status)); |
| 2109 | |
| 2110 | switch (cmd->engine) { |
| 2111 | case CCP_ENGINE_AES: |
| 2112 | ret = ccp_run_aes_cmd(cmd_q, cmd); |
| 2113 | break; |
| 2114 | case CCP_ENGINE_XTS_AES_128: |
| 2115 | ret = ccp_run_xts_aes_cmd(cmd_q, cmd); |
| 2116 | break; |
| 2117 | case CCP_ENGINE_SHA: |
| 2118 | ret = ccp_run_sha_cmd(cmd_q, cmd); |
| 2119 | break; |
| 2120 | case CCP_ENGINE_RSA: |
| 2121 | ret = ccp_run_rsa_cmd(cmd_q, cmd); |
| 2122 | break; |
| 2123 | case CCP_ENGINE_PASSTHRU: |
| 2124 | ret = ccp_run_passthru_cmd(cmd_q, cmd); |
| 2125 | break; |
| 2126 | case CCP_ENGINE_ECC: |
| 2127 | ret = ccp_run_ecc_cmd(cmd_q, cmd); |
| 2128 | break; |
| 2129 | default: |
| 2130 | ret = -EINVAL; |
| 2131 | } |
| 2132 | |
| 2133 | return ret; |
| 2134 | } |