| 1 | /****************************************************************************** |
| 2 | ** |
| 3 | ** FILE NAME : ifxmips_async_des.c |
| 4 | ** PROJECT : IFX UEIP |
| 5 | ** MODULES : DEU Module |
| 6 | ** |
| 7 | ** DATE : October 11, 2010 |
| 8 | ** AUTHOR : Mohammad Firdaus |
| 9 | ** DESCRIPTION : Data Encryption Unit Driver for DES Algorithm |
| 10 | ** COPYRIGHT : Copyright (c) 2010 |
| 11 | ** Infineon Technologies AG |
| 12 | ** Am Campeon 1-12, 85579 Neubiberg, Germany |
| 13 | ** |
| 14 | ** This program is free software; you can redistribute it and/or modify |
| 15 | ** it under the terms of the GNU General Public License as published by |
| 16 | ** the Free Software Foundation; either version 2 of the License, or |
| 17 | ** (at your option) any later version. |
| 18 | ** |
| 19 | ** HISTORY |
| 20 | ** $Date $Author $Comment |
| 21 | ** 08,Sept 2009 Mohammad Firdaus Initial UEIP release |
| 22 | ** 11, Oct 2010 Mohammad Firdaus Kernel Port incl. Async. Ablkcipher mode |
| 23 | ** 21,March 2011 Mohammad Firdaus Changes for Kernel 2.6.32 and IPSec integration |
| 24 | *******************************************************************************/ |
| 25 | /*! |
| 26 | \defgroup IFX_DEU IFX_DEU_DRIVERS |
| 27 | \ingroup API |
| 28 | \brief ifx DEU driver module |
| 29 | */ |
| 30 | |
| 31 | /*! |
| 32 | \file ifxmips_async_des.c |
| 33 | \ingroup IFX_DEU |
| 34 | \brief DES Encryption Driver main file |
| 35 | */ |
| 36 | |
| 37 | /*! |
| 38 | \defgroup IFX_DES_FUNCTIONS IFX_DES_FUNCTIONS |
| 39 | \ingroup IFX_DEU |
| 40 | \brief IFX DES driver Functions |
| 41 | */ |
| 42 | |
| 43 | #include <linux/wait.h> |
| 44 | #include <linux/crypto.h> |
| 45 | #include <linux/kernel.h> |
| 46 | #include <linux/interrupt.h> |
| 47 | #include <linux/spinlock.h> |
| 48 | #include <linux/list.h> |
| 49 | #include <crypto/ctr.h> |
| 50 | #include <crypto/aes.h> |
| 51 | #include <crypto/algapi.h> |
| 52 | #include <crypto/scatterwalk.h> |
| 53 | |
| 54 | #include <asm/ifx/ifx_regs.h> |
| 55 | #include <asm/ifx/ifx_types.h> |
| 56 | #include <asm/ifx/common_routines.h> |
| 57 | #include <asm/ifx/irq.h> |
| 58 | #include <asm/ifx/ifx_pmu.h> |
| 59 | #include <asm/ifx/ifx_gpio.h> |
| 60 | #include <asm/kmap_types.h> |
| 61 | |
| 62 | #include "ifxmips_deu.h" |
| 63 | |
| 64 | #if defined(CONFIG_DANUBE) |
| 65 | #include "ifxmips_deu_danube.h" |
| 66 | extern int ifx_danube_pre_1_4; |
| 67 | #elif defined(CONFIG_AR9) |
| 68 | #include "ifxmips_deu_ar9.h" |
| 69 | #elif defined(CONFIG_VR9) || defined(CONFIG_AR10) |
| 70 | #include "ifxmips_deu_vr9.h" |
| 71 | #else |
| 72 | #error "Unkown platform" |
| 73 | #endif |
| 74 | |
| 75 | /* DMA specific header and variables */ |
| 76 | |
| 77 | spinlock_t des_lock; |
| 78 | #define CRTCL_SECT_INIT spin_lock_init(&des_lock) |
| 79 | #define CRTCL_SECT_START spin_lock_irqsave(&des_lock, flag) |
| 80 | #define CRTCL_SECT_END spin_unlock_irqrestore(&des_lock, flag) |
| 81 | |
| 82 | /* Preprocessor declerations */ |
| 83 | #ifdef CRYPTO_DEBUG |
| 84 | extern char debug_level; |
| 85 | #define DPRINTF(level, format, args...) if (level < debug_level) printk(KERN_INFO "[%s %s %d]: " format, __FILE__, __func__, __LINE__, ##args); |
| 86 | #else |
| 87 | #define DPRINTF(level, format, args...) |
| 88 | #endif |
| 89 | //#define DES_3DES_START IFX_DES_CON |
| 90 | #define DES_KEY_SIZE 8 |
| 91 | #define DES_EXPKEY_WORDS 32 |
| 92 | #define DES_BLOCK_SIZE 8 |
| 93 | #define DES3_EDE_KEY_SIZE (3 * DES_KEY_SIZE) |
| 94 | #define DES3_EDE_EXPKEY_WORDS (3 * DES_EXPKEY_WORDS) |
| 95 | #define DES3_EDE_BLOCK_SIZE DES_BLOCK_SIZE |
| 96 | |
| 97 | /* Function Declaration to prevent warning messages */ |
| 98 | void des_chip_init (void); |
| 99 | u32 endian_swap(u32 input); |
| 100 | u32 input_swap(u32 input); |
| 101 | int aes_memory_allocate(int value); |
| 102 | int des_memory_allocate(int value); |
| 103 | void memory_release(u32 *buffer); |
| 104 | u32* memory_alignment(const u8 *arg, u32 *buff_alloc, int in_out, int nbytes); |
| 105 | void aes_dma_memory_copy(u32 *outcopy, u32 *out_dma, u8 *out_arg, int nbytes); |
| 106 | void des_dma_memory_copy(u32 *outcopy, u32 *out_dma, u8 *out_arg, int nbytes); |
| 107 | |
| 108 | static int lq_deu_des_core (void *ctx_arg, u8 *out_arg, const u8 *in_arg, |
| 109 | u8 *iv_arg, u32 nbytes, int encdec, int mode); |
| 110 | |
| 111 | struct des_ctx { |
| 112 | int controlr_M; |
| 113 | int key_length; |
| 114 | u8 iv[DES_BLOCK_SIZE]; |
| 115 | u32 expkey[DES3_EDE_EXPKEY_WORDS]; |
| 116 | }; |
| 117 | |
| 118 | |
| 119 | static int disable_multiblock = 0; |
| 120 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0) |
| 121 | module_param(disable_multiblock, int, 0); |
| 122 | #else |
| 123 | MODULE_PARM_DESC(disable_multiblock, "Disable encryption of whole multiblock buffers"); |
| 124 | #endif |
| 125 | |
| 126 | static int disable_deudma = 1; |
| 127 | |
| 128 | struct des_container { |
| 129 | u8 *iv; |
| 130 | u8 *dst_buf; |
| 131 | u8 *src_buf; |
| 132 | int mode; |
| 133 | int encdec; |
| 134 | int complete; |
| 135 | int flag; |
| 136 | |
| 137 | u32 bytes_processed; |
| 138 | u32 nbytes; |
| 139 | |
| 140 | struct ablkcipher_request arequest; |
| 141 | }; |
| 142 | |
| 143 | des_priv_t *des_queue; |
| 144 | extern deu_drv_priv_t deu_dma_priv; |
| 145 | |
| 146 | void hexdump1(unsigned char *buf, unsigned int len) |
| 147 | { |
| 148 | print_hex_dump(KERN_CONT, "", DUMP_PREFIX_OFFSET, |
| 149 | 16, 1, |
| 150 | buf, len, false); |
| 151 | } |
| 152 | |
| 153 | |
| 154 | /*! \fn int lq_des_setkey(struct crypto_ablkcipher *tfm, const u8 *key, unsigned int keylen) |
| 155 | * \ingroup IFX_DES_FUNCTIONS |
| 156 | * \brief sets DES key |
| 157 | * \param tfm linux crypto algo transform |
| 158 | * \param key input key |
| 159 | * \param keylen key length |
| 160 | */ |
| 161 | static int lq_des_setkey(struct crypto_ablkcipher *tfm, const u8 *key, |
| 162 | unsigned int keylen) |
| 163 | { |
| 164 | struct des_ctx *dctx = crypto_ablkcipher_ctx(tfm); |
| 165 | |
| 166 | //printk("setkey in %s\n", __FILE__); |
| 167 | |
| 168 | dctx->controlr_M = 0; // des |
| 169 | dctx->key_length = keylen; |
| 170 | |
| 171 | memcpy ((u8 *) (dctx->expkey), key, keylen); |
| 172 | |
| 173 | return 0; |
| 174 | } |
| 175 | |
| 176 | /*! \fn int lq_des3_ede_setkey(struct crypto_ablkcipher *tfm, const u8 *key, unsigned int keylen) |
| 177 | * \ingroup IFX_DES_FUNCTIONS |
| 178 | * \brief sets DES key |
| 179 | * \param tfm linux crypto algo transform |
| 180 | * \param key input key |
| 181 | * \param keylen key length |
| 182 | */ |
| 183 | |
| 184 | static int lq_des3_ede_setkey(struct crypto_ablkcipher *tfm, const u8 *in_key, |
| 185 | unsigned int keylen) |
| 186 | { |
| 187 | struct des_ctx *dctx = crypto_ablkcipher_ctx(tfm); |
| 188 | |
| 189 | //printk("setkey in %s\n", __FILE__); |
| 190 | |
| 191 | dctx->controlr_M = keylen/8 + 1; // des |
| 192 | dctx->key_length = keylen; |
| 193 | |
| 194 | memcpy ((u8 *) (dctx->expkey), in_key, keylen); |
| 195 | |
| 196 | return 0; |
| 197 | } |
| 198 | |
| 199 | /*! \fn void ifx_deu_des_core(void *ctx_arg, u8 *out_arg, const u8 *in_arg, u8 *iv_arg, u32 nbytes, int encdec, int mode) |
| 200 | * \ingroup IFX_DES_FUNCTIONS |
| 201 | * \brief main interface to DES hardware |
| 202 | * \param ctx_arg crypto algo context |
| 203 | * \param out_arg output bytestream |
| 204 | * \param in_arg input bytestream |
| 205 | * \param iv_arg initialization vector |
| 206 | * \param nbytes length of bytestream |
| 207 | * \param encdec 1 for encrypt; 0 for decrypt |
| 208 | * \param mode operation mode such as ebc, cbc |
| 209 | */ |
| 210 | |
| 211 | static int lq_deu_des_core (void *ctx_arg, u8 *out_arg, const u8 *in_arg, |
| 212 | u8 *iv_arg, u32 nbytes, int encdec, int mode) |
| 213 | { |
| 214 | volatile struct des_t *des = (struct des_t *) DES_3DES_START; |
| 215 | struct des_ctx *dctx = ctx_arg; |
| 216 | u32 *key = dctx->expkey; |
| 217 | unsigned long flag; |
| 218 | |
| 219 | int i = 0; |
| 220 | int nblocks = 0; |
| 221 | |
| 222 | CRTCL_SECT_START; |
| 223 | |
| 224 | des->controlr.M = dctx->controlr_M; |
| 225 | if (dctx->controlr_M == 0) // des |
| 226 | { |
| 227 | des->K1HR = DEU_ENDIAN_SWAP(*((u32 *) key + 0)); |
| 228 | des->K1LR = DEU_ENDIAN_SWAP(*((u32 *) key + 1)); |
| 229 | |
| 230 | } |
| 231 | else { |
| 232 | /* Hardware Section */ |
| 233 | switch (dctx->key_length) { |
| 234 | case 24: |
| 235 | des->K3HR = DEU_ENDIAN_SWAP(*((u32 *) key + 4)); |
| 236 | des->K3LR = DEU_ENDIAN_SWAP(*((u32 *) key + 5)); |
| 237 | /* no break; */ |
| 238 | |
| 239 | case 16: |
| 240 | des->K2HR = DEU_ENDIAN_SWAP(*((u32 *) key + 2)); |
| 241 | des->K2LR = DEU_ENDIAN_SWAP(*((u32 *) key + 3)); |
| 242 | |
| 243 | /* no break; */ |
| 244 | case 8: |
| 245 | des->K1HR = DEU_ENDIAN_SWAP(*((u32 *) key + 0)); |
| 246 | des->K1LR = DEU_ENDIAN_SWAP(*((u32 *) key + 1)); |
| 247 | break; |
| 248 | |
| 249 | default: |
| 250 | CRTCL_SECT_END; |
| 251 | return -EINVAL; |
| 252 | } |
| 253 | } |
| 254 | |
| 255 | des->controlr.E_D = !encdec; //encryption |
| 256 | des->controlr.O = mode; //0 ECB 1 CBC 2 OFB 3 CFB 4 CTR hexdump(prin,sizeof(*des)); |
| 257 | |
| 258 | if (mode > 0) { |
| 259 | des->IVHR = DEU_ENDIAN_SWAP(*(u32 *) iv_arg); |
| 260 | des->IVLR = DEU_ENDIAN_SWAP(*((u32 *) iv_arg + 1)); |
| 261 | }; |
| 262 | |
| 263 | /* memory alignment issue */ |
| 264 | dword_mem_aligned_in = (u32 *) DEU_DWORD_REORDERING(in_arg, des_buff_in, BUFFER_IN, nbytes); |
| 265 | |
| 266 | deu_priv->deu_rx_buf = (u32 *) out_arg; |
| 267 | deu_priv->deu_rx_len = nbytes; |
| 268 | |
| 269 | dma->controlr.ALGO = 0; //DES |
| 270 | des->controlr.DAU = 0; |
| 271 | dma->controlr.BS = 0; |
| 272 | dma->controlr.EN = 1; |
| 273 | |
| 274 | while (des->controlr.BUS) { |
| 275 | }; |
| 276 | |
| 277 | wlen = dma_device_write (dma_device, (u8 *) dword_mem_aligned_in, nbytes, NULL); |
| 278 | if (wlen != nbytes) { |
| 279 | dma->controlr.EN = 0; |
| 280 | CRTCL_SECT_END; |
| 281 | printk (KERN_ERR "[%s %s %d]: dma_device_write fail!\n", __FILE__, __func__, __LINE__); |
| 282 | return -EINVAL; |
| 283 | } |
| 284 | |
| 285 | |
| 286 | /* Prepare Rx buf length used in dma psuedo interrupt */ |
| 287 | outcopy = (u32 *) DEU_DWORD_REORDERING(out_arg, des_buff_out, BUFFER_OUT, nbytes); |
| 288 | deu_priv->outcopy = outcopy; |
| 289 | deu_priv->event_src = DES_ASYNC_EVENT; |
| 290 | |
| 291 | if (mode > 0) { |
| 292 | *(u32 *) iv_arg = DEU_ENDIAN_SWAP(des->IVHR); |
| 293 | *((u32 *) iv_arg + 1) = DEU_ENDIAN_SWAP(des->IVLR); |
| 294 | }; |
| 295 | |
| 296 | CRTCL_SECT_END; |
| 297 | |
| 298 | return -EINPROGRESS; |
| 299 | |
| 300 | } |
| 301 | |
| 302 | static int count_sgs(struct scatterlist *sl, unsigned int total_bytes) |
| 303 | { |
| 304 | int i = 0; |
| 305 | |
| 306 | do { |
| 307 | total_bytes -= sl[i].length; |
| 308 | i++; |
| 309 | |
| 310 | } while (total_bytes > 0); |
| 311 | |
| 312 | return i; |
| 313 | } |
| 314 | |
| 315 | /* \fn static inline struct des_container *des_container_cast ( |
| 316 | * struct scatterlist *dst) |
| 317 | * \ingroup IFX_DES_FUNCTIONS |
| 318 | * \brief Locate the structure des_container in memory. |
| 319 | * \param *areq Pointer to memory location where ablkcipher_request is located |
| 320 | * \return *des_cointainer The function pointer to des_container |
| 321 | */ |
| 322 | |
| 323 | static inline struct des_container *des_container_cast( |
| 324 | struct ablkcipher_request *areq) |
| 325 | { |
| 326 | return container_of(areq, struct des_container, arequest); |
| 327 | } |
| 328 | |
| 329 | /* \fn static void lq_sg_complete(struct des_container *des_con) |
| 330 | * \ingroup IFX_DES_FUNCTIONS |
| 331 | * \brief Free the used up memory after encryt/decrypt. |
| 332 | */ |
| 333 | |
| 334 | static void lq_sg_complete(struct des_container *des_con) |
| 335 | { |
| 336 | unsigned long queue_flag; |
| 337 | |
| 338 | spin_lock_irqsave(&des_queue->lock, queue_flag); |
| 339 | kfree(des_con); |
| 340 | spin_unlock_irqrestore(&des_queue->lock, queue_flag); |
| 341 | } |
| 342 | |
| 343 | /* \fn void lq_sg_init(struct scatterlist *src, |
| 344 | * struct scatterlist *dst) |
| 345 | * \ingroup IFX_DES_FUNCTIONS |
| 346 | * \brief Maps the scatterlists into a source/destination page. |
| 347 | * \param *src Pointer to the source scatterlist |
| 348 | * \param *dst Pointer to the destination scatterlist |
| 349 | */ |
| 350 | |
| 351 | static void lq_sg_init(struct des_container *des_con, struct scatterlist *src, |
| 352 | struct scatterlist *dst) |
| 353 | { |
| 354 | struct page *dst_page, *src_page; |
| 355 | |
| 356 | src_page = sg_virt(src); |
| 357 | des_con->src_buf = (char *) src_page; |
| 358 | |
| 359 | dst_page = sg_virt(dst); |
| 360 | des_con->dst_buf = (char *) dst_page; |
| 361 | } |
| 362 | |
| 363 | /* \fn static int process_next_packet(struct des_container *des_con, struct ablkcipher_request *areq, |
| 364 | * int state) |
| 365 | * \ingroup IFX_DES_FUNCTIONS |
| 366 | * \brief Process the next packet after dequeuing the packet from crypto queue |
| 367 | * \param *des_con Pointer to DES container structure |
| 368 | * \param *areq Pointer to ablkcipher_request container |
| 369 | * \param state State of the packet (scattered packet or new packet to be processed) |
| 370 | * \return -EINVAL: DEU failure, -EINPROGRESS: DEU encrypt/decrypt in progress, 1: no scatterlist left |
| 371 | */ |
| 372 | |
| 373 | static int process_next_packet(struct des_container *des_con, struct ablkcipher_request *areq, |
| 374 | int state) |
| 375 | { |
| 376 | u8 *iv; |
| 377 | int mode, encdec, err = -EINVAL; |
| 378 | u32 remain, inc, chunk_size, nbytes; |
| 379 | struct scatterlist *src = NULL; |
| 380 | struct scatterlist *dst = NULL; |
| 381 | struct crypto_ablkcipher *cipher; |
| 382 | struct des_ctx *ctx; |
| 383 | unsigned long queue_flag; |
| 384 | |
| 385 | spin_lock_irqsave(&des_queue->lock, queue_flag); |
| 386 | |
| 387 | mode = des_con->mode; |
| 388 | encdec = des_con->encdec; |
| 389 | iv = des_con->iv; |
| 390 | |
| 391 | if (state & PROCESS_SCATTER) { |
| 392 | src = scatterwalk_sg_next(areq->src); |
| 393 | dst = scatterwalk_sg_next(areq->dst); |
| 394 | |
| 395 | if (!src || !dst) { |
| 396 | spin_unlock_irqrestore(&des_queue->lock, queue_flag); |
| 397 | return 1; |
| 398 | } |
| 399 | } |
| 400 | else if (state & PROCESS_NEW_PACKET) { |
| 401 | src = areq->src; |
| 402 | dst = areq->dst; |
| 403 | } |
| 404 | |
| 405 | remain = des_con->bytes_processed; |
| 406 | chunk_size = src->length; |
| 407 | |
| 408 | //printk("debug ln: %d, func: %s, reqsize: %d, scattersize: %d\n", |
| 409 | // __LINE__, __func__, areq->nbytes, chunk_size); |
| 410 | |
| 411 | if (remain > DEU_MAX_PACKET_SIZE) |
| 412 | inc = DEU_MAX_PACKET_SIZE; |
| 413 | else if(remain > chunk_size) |
| 414 | inc = chunk_size; |
| 415 | else |
| 416 | inc = remain; |
| 417 | |
| 418 | remain -= inc; |
| 419 | des_con->nbytes = inc; |
| 420 | |
| 421 | if (state & PROCESS_SCATTER) { |
| 422 | des_con->src_buf += des_con->nbytes; |
| 423 | des_con->dst_buf += des_con->nbytes; |
| 424 | } |
| 425 | |
| 426 | lq_sg_init(des_con, src, dst); |
| 427 | |
| 428 | nbytes = des_con->nbytes; |
| 429 | |
| 430 | cipher = crypto_ablkcipher_reqtfm(areq); |
| 431 | ctx = crypto_ablkcipher_ctx(cipher); |
| 432 | |
| 433 | if (des_queue->hw_status == DES_IDLE) { |
| 434 | des_queue->hw_status = DES_STARTED; |
| 435 | } |
| 436 | |
| 437 | des_con->bytes_processed -= des_con->nbytes; |
| 438 | err = ablkcipher_enqueue_request(&des_queue->list, &des_con->arequest); |
| 439 | if (err == -EBUSY) { |
| 440 | printk("Failed to enqueue request, ln: %d, err: %d\n", |
| 441 | __LINE__, err); |
| 442 | spin_unlock_irqrestore(&des_queue->lock, queue_flag); |
| 443 | return -EINVAL; |
| 444 | } |
| 445 | |
| 446 | spin_unlock_irqrestore(&des_queue->lock, queue_flag); |
| 447 | err = lq_deu_des_core(ctx, des_con->dst_buf, des_con->src_buf, iv, nbytes, encdec, mode); |
| 448 | |
| 449 | return err; |
| 450 | } |
| 451 | |
| 452 | /* \fn static void process_queue(unsigned long data) |
| 453 | * \ingroup IFX_DES_FUNCTIONS |
| 454 | * \brief Process next packet in queue |
| 455 | * \param data not used |
| 456 | * \return |
| 457 | */ |
| 458 | |
| 459 | static void process_queue(unsigned long data) |
| 460 | { |
| 461 | DEU_WAKEUP_EVENT(deu_dma_priv.deu_thread_wait, DES_ASYNC_EVENT, |
| 462 | deu_dma_priv.des_event_flags); |
| 463 | |
| 464 | } |
| 465 | |
| 466 | /* \fn static int des_crypto_thread (void *data) |
| 467 | * \ingroup IFX_DES_FUNCTIONS |
| 468 | * \brief DES thread that handles crypto requests from upper layer & DMA |
| 469 | * \param *data Not used |
| 470 | * \return -EINVAL: DEU failure, -EBUSY: DEU HW busy, 0: exit thread |
| 471 | */ |
| 472 | |
| 473 | static int des_crypto_thread(void *data) |
| 474 | { |
| 475 | struct des_container *des_con = NULL; |
| 476 | struct ablkcipher_request *areq = NULL; |
| 477 | int err; |
| 478 | unsigned long queue_flag; |
| 479 | |
| 480 | daemonize("lq_des_thread"); |
| 481 | |
| 482 | while (1) |
| 483 | { |
| 484 | DEU_WAIT_EVENT(deu_dma_priv.deu_thread_wait, DES_ASYNC_EVENT, |
| 485 | deu_dma_priv.des_event_flags); |
| 486 | spin_lock_irqsave(&des_queue->lock, queue_flag); |
| 487 | |
| 488 | /* wait to prevent starting a crypto session before |
| 489 | * exiting the dma interrupt thread. |
| 490 | */ |
| 491 | |
| 492 | if (des_queue->hw_status == DES_STARTED) { |
| 493 | areq = ablkcipher_dequeue_request(&des_queue->list); |
| 494 | des_con = des_container_cast(areq); |
| 495 | des_queue->hw_status = DES_BUSY; |
| 496 | } |
| 497 | else if (des_queue->hw_status == DES_IDLE) { |
| 498 | areq = ablkcipher_dequeue_request(&des_queue->list); |
| 499 | des_con = des_container_cast(areq); |
| 500 | des_queue->hw_status = DES_STARTED; |
| 501 | } |
| 502 | else if (des_queue->hw_status == DES_BUSY) { |
| 503 | areq = ablkcipher_dequeue_request(&des_queue->list); |
| 504 | des_con = des_container_cast(areq); |
| 505 | } |
| 506 | else if (des_queue->hw_status == DES_COMPLETED) { |
| 507 | areq->base.complete(&areq->base, 0); |
| 508 | lq_sg_complete(des_con); |
| 509 | des_queue->hw_status = DES_IDLE; |
| 510 | spin_unlock_irqrestore(&des_queue->lock, queue_flag); |
| 511 | return 0; |
| 512 | } |
| 513 | spin_unlock_irqrestore(&des_queue->lock, queue_flag); |
| 514 | |
| 515 | if ((des_con->bytes_processed == 0)) { |
| 516 | goto des_done; |
| 517 | } |
| 518 | |
| 519 | if (!des_con) { |
| 520 | goto des_done; |
| 521 | } |
| 522 | |
| 523 | if (des_con->flag & PROCESS_NEW_PACKET) { |
| 524 | des_con->flag = PROCESS_SCATTER; |
| 525 | err = process_next_packet(des_con, areq, PROCESS_NEW_PACKET); |
| 526 | } |
| 527 | else |
| 528 | err = process_next_packet(des_con, areq, PROCESS_SCATTER); |
| 529 | |
| 530 | if (err == -EINVAL) { |
| 531 | areq->base.complete(&areq->base, err); |
| 532 | lq_sg_complete(des_con); |
| 533 | printk("src/dst returned -EINVAL in func: %s\n", __func__); |
| 534 | } |
| 535 | else if (err > 0) { |
| 536 | printk("src/dst returned zero in func: %s\n", __func__); |
| 537 | goto des_done; |
| 538 | } |
| 539 | |
| 540 | continue; |
| 541 | |
| 542 | des_done: |
| 543 | //printk("debug line - %d, func: %s, qlen: %d\n", __LINE__, __func__, des_queue->list.qlen); |
| 544 | areq->base.complete(&areq->base, 0); |
| 545 | lq_sg_complete(des_con); |
| 546 | |
| 547 | spin_lock_irqsave(&des_queue->lock, queue_flag); |
| 548 | if (des_queue->list.qlen > 0) { |
| 549 | spin_unlock_irqrestore(&des_queue->lock, queue_flag); |
| 550 | tasklet_schedule(&des_queue->des_task); |
| 551 | } |
| 552 | else { |
| 553 | des_queue->hw_status = DES_IDLE; |
| 554 | spin_unlock_irqrestore(&des_queue->lock, queue_flag); |
| 555 | } |
| 556 | } // while(1) |
| 557 | |
| 558 | return 0; |
| 559 | |
| 560 | } |
| 561 | |
| 562 | /* \fn static int lq_des_queue_mgr(struct des_ctx *ctx, struct ablkcipher_request *areq, |
| 563 | u8 *iv, int encdec, int mode) |
| 564 | * \ingroup IFX_DES_FUNCTIONS |
| 565 | * \brief starts the process of queuing DEU requests |
| 566 | * \param *ctx crypto algo contax |
| 567 | * \param *areq Pointer to the balkcipher requests |
| 568 | * \param *iv Pointer to intput vector location |
| 569 | * \param dir Encrypt/Decrypt |
| 570 | * \mode The mode DES algo is running |
| 571 | * \return 0 if success |
| 572 | */ |
| 573 | |
| 574 | static int lq_queue_mgr(struct des_ctx *ctx, struct ablkcipher_request *areq, |
| 575 | u8 *iv, int encdec, int mode) |
| 576 | { |
| 577 | int err = -EINVAL; |
| 578 | unsigned long queue_flag; |
| 579 | struct scatterlist *src = areq->src; |
| 580 | struct scatterlist *dst = areq->dst; |
| 581 | struct des_container *des_con = NULL; |
| 582 | u32 remain, inc, nbytes = areq->nbytes; |
| 583 | u32 chunk_bytes = src->length; |
| 584 | |
| 585 | des_con = (struct des_container *)kmalloc(sizeof(struct des_container), |
| 586 | GFP_KERNEL); |
| 587 | |
| 588 | if (!(des_con)) { |
| 589 | printk("Cannot allocate memory for AES container, fn %s, ln %d\n", |
| 590 | __func__, __LINE__); |
| 591 | return -ENOMEM; |
| 592 | } |
| 593 | |
| 594 | /* DES encrypt/decrypt mode */ |
| 595 | if (mode == 5) { |
| 596 | nbytes = DES_BLOCK_SIZE; |
| 597 | chunk_bytes = DES_BLOCK_SIZE; |
| 598 | mode = 0; |
| 599 | } |
| 600 | |
| 601 | des_con->bytes_processed = nbytes; |
| 602 | des_con->arequest = (*areq); |
| 603 | remain = nbytes; |
| 604 | |
| 605 | //printk("debug - Line: %d, func: %s, reqsize: %d, scattersize: %d\n", |
| 606 | // __LINE__, __func__, nbytes, chunk_bytes); |
| 607 | |
| 608 | if (remain > DEU_MAX_PACKET_SIZE) |
| 609 | inc = DEU_MAX_PACKET_SIZE; |
| 610 | else if(remain > chunk_bytes) |
| 611 | inc = chunk_bytes; |
| 612 | else |
| 613 | inc = remain; |
| 614 | |
| 615 | remain -= inc; |
| 616 | lq_sg_init(des_con, src, dst); |
| 617 | |
| 618 | if (remain <= 0 ) { |
| 619 | des_con->complete = 1; |
| 620 | } |
| 621 | else |
| 622 | des_con->complete = 0; |
| 623 | |
| 624 | des_con->nbytes = inc; |
| 625 | des_con->iv = iv; |
| 626 | des_con->mode = mode; |
| 627 | des_con->encdec = encdec; |
| 628 | |
| 629 | spin_lock_irqsave(&des_queue->lock, queue_flag); |
| 630 | |
| 631 | if (des_queue->hw_status == DES_STARTED || des_queue->hw_status == DES_BUSY || |
| 632 | des_queue->list.qlen > 0) { |
| 633 | |
| 634 | des_con->flag = PROCESS_NEW_PACKET; |
| 635 | err = ablkcipher_enqueue_request(&des_queue->list, &des_con->arequest); |
| 636 | if (err == -EBUSY) { |
| 637 | spin_unlock_irqrestore(&des_queue->lock, queue_flag); |
| 638 | printk("Fail to enqueue ablkcipher request ln: %d, err: %d\n", |
| 639 | __LINE__, err); |
| 640 | return err; |
| 641 | } |
| 642 | |
| 643 | spin_unlock_irqrestore(&des_queue->lock, queue_flag); |
| 644 | return -EINPROGRESS; |
| 645 | |
| 646 | } |
| 647 | else if (des_queue->hw_status == DES_IDLE) { |
| 648 | des_queue->hw_status = DES_STARTED; |
| 649 | } |
| 650 | |
| 651 | des_con->flag = PROCESS_SCATTER; |
| 652 | des_con->bytes_processed -= des_con->nbytes; |
| 653 | |
| 654 | err = ablkcipher_enqueue_request(&des_queue->list, &des_con->arequest); |
| 655 | if (err == -EBUSY) { |
| 656 | printk("Fail to enqueue ablkcipher request ln: %d, err: %d\n", |
| 657 | __LINE__, err); |
| 658 | |
| 659 | spin_unlock_irqrestore(&des_queue->lock, queue_flag); |
| 660 | return err; |
| 661 | } |
| 662 | |
| 663 | spin_unlock_irqrestore(&des_queue->lock, queue_flag); |
| 664 | return lq_deu_des_core(ctx, des_con->dst_buf, des_con->src_buf, iv, inc, encdec, mode); |
| 665 | |
| 666 | } |
| 667 | |
| 668 | /* \fn static int lq_des_encrypt(struct ablkcipher_request *areq) |
| 669 | * \ingroup IFX_DES_FUNCTIONS |
| 670 | * \brief Decrypt function for DES algo |
| 671 | * \param *areq Pointer to ablkcipher request in memory |
| 672 | * \return 0 is success, -EINPROGRESS if encryting, EINVAL if failure |
| 673 | */ |
| 674 | |
| 675 | static int lq_des_encrypt(struct ablkcipher_request *areq) |
| 676 | { |
| 677 | struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq); |
| 678 | struct des_ctx *ctx = crypto_ablkcipher_ctx(cipher); |
| 679 | |
| 680 | return lq_queue_mgr(ctx, areq, NULL, CRYPTO_DIR_ENCRYPT, 5); |
| 681 | |
| 682 | } |
| 683 | |
| 684 | /* \fn static int lq_des_decrypt(struct ablkcipher_request *areq) |
| 685 | * \ingroup IFX_DES_FUNCTIONS |
| 686 | * \brief Decrypt function for DES algo |
| 687 | * \param *areq Pointer to ablkcipher request in memory |
| 688 | * \return 0 is success, -EINPROGRESS if encryting, EINVAL if failure |
| 689 | */ |
| 690 | |
| 691 | static int lq_des_decrypt(struct ablkcipher_request *areq) |
| 692 | { |
| 693 | struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq); |
| 694 | struct des_ctx *ctx = crypto_ablkcipher_ctx(cipher); |
| 695 | |
| 696 | return lq_queue_mgr(ctx, areq, NULL, CRYPTO_DIR_DECRYPT, 5); |
| 697 | } |
| 698 | |
| 699 | /* \fn static int lq_ecb_des_encrypt(struct ablkcipher_request *areq) |
| 700 | * \ingroup IFX_DES_FUNCTIONS |
| 701 | * \brief Decrypt function for DES algo |
| 702 | * \param *areq Pointer to ablkcipher request in memory |
| 703 | * \return 0 is success, -EINPROGRESS if encryting, EINVAL if failure |
| 704 | */ |
| 705 | |
| 706 | static int lq_ecb_des_encrypt(struct ablkcipher_request *areq) |
| 707 | { |
| 708 | struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq); |
| 709 | struct des_ctx *ctx = crypto_ablkcipher_ctx(cipher); |
| 710 | |
| 711 | return lq_queue_mgr(ctx, areq, areq->info, CRYPTO_DIR_ENCRYPT, 0); |
| 712 | } |
| 713 | |
| 714 | /* \fn static int lq_ecb_des_decrypt(struct ablkcipher_request *areq) |
| 715 | * \ingroup IFX_DES_FUNCTIONS |
| 716 | * \brief Decrypt function for DES algo |
| 717 | * \param *areq Pointer to ablkcipher request in memory |
| 718 | * \return 0 is success, -EINPROGRESS if encryting, EINVAL if failure |
| 719 | */ |
| 720 | static int lq_ecb_des_decrypt(struct ablkcipher_request *areq) |
| 721 | { |
| 722 | struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq); |
| 723 | struct des_ctx *ctx = crypto_ablkcipher_ctx(cipher); |
| 724 | |
| 725 | return lq_queue_mgr(ctx, areq, areq->info, CRYPTO_DIR_DECRYPT, 0); |
| 726 | |
| 727 | } |
| 728 | |
| 729 | /* \fn static int lq_cbc_ecb_des_encrypt(struct ablkcipher_request *areq) |
| 730 | * \ingroup IFX_DES_FUNCTIONS |
| 731 | * \brief Decrypt function for DES algo |
| 732 | * \param *areq Pointer to ablkcipher request in memory |
| 733 | * \return 0 is success, -EINPROGRESS if encryting, EINVAL if failure |
| 734 | */ |
| 735 | |
| 736 | static int lq_cbc_des_encrypt(struct ablkcipher_request *areq) |
| 737 | { |
| 738 | struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq); |
| 739 | struct des_ctx *ctx = crypto_ablkcipher_ctx(cipher); |
| 740 | |
| 741 | return lq_queue_mgr(ctx, areq, areq->info, CRYPTO_DIR_ENCRYPT, 1); |
| 742 | } |
| 743 | /* \fn static int lq_cbc_des_decrypt(struct ablkcipher_request *areq) |
| 744 | * \ingroup IFX_DES_FUNCTIONS |
| 745 | * \brief Decrypt function for DES algo |
| 746 | * \param *areq Pointer to ablkcipher request in memory |
| 747 | * \return 0 is success, -EINPROGRESS if encryting, EINVAL if failure |
| 748 | */ |
| 749 | |
| 750 | static int lq_cbc_des_decrypt(struct ablkcipher_request *areq) |
| 751 | { |
| 752 | struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq); |
| 753 | struct des_ctx *ctx = crypto_ablkcipher_ctx(cipher); |
| 754 | |
| 755 | return lq_queue_mgr(ctx, areq, areq->info, CRYPTO_DIR_DECRYPT, 1); |
| 756 | } |
| 757 | |
| 758 | struct lq_des_alg { |
| 759 | struct crypto_alg alg; |
| 760 | }; |
| 761 | |
| 762 | /* DES Supported algo array */ |
| 763 | static struct lq_des_alg des_drivers_alg [] = { |
| 764 | { |
| 765 | .alg = { |
| 766 | .cra_name = "des", |
| 767 | .cra_driver_name = "lqdeu-des", |
| 768 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
| 769 | .cra_blocksize = DES_BLOCK_SIZE, |
| 770 | .cra_ctxsize = sizeof(struct des_ctx), |
| 771 | .cra_type = &crypto_ablkcipher_type, |
| 772 | .cra_priority = 300, |
| 773 | .cra_module = THIS_MODULE, |
| 774 | .cra_ablkcipher = { |
| 775 | .setkey = lq_des_setkey, |
| 776 | .encrypt = lq_des_encrypt, |
| 777 | .decrypt = lq_des_decrypt, |
| 778 | .geniv = "eseqiv", |
| 779 | .min_keysize = DES_KEY_SIZE, |
| 780 | .max_keysize = DES_KEY_SIZE, |
| 781 | .ivsize = DES_BLOCK_SIZE, |
| 782 | } |
| 783 | } |
| 784 | |
| 785 | },{ |
| 786 | .alg = { |
| 787 | .cra_name = "ecb(des)", |
| 788 | .cra_driver_name = "lqdeu-ecb(des)", |
| 789 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
| 790 | .cra_blocksize = DES_BLOCK_SIZE, |
| 791 | .cra_ctxsize = sizeof(struct des_ctx), |
| 792 | .cra_type = &crypto_ablkcipher_type, |
| 793 | .cra_priority = 300, |
| 794 | .cra_module = THIS_MODULE, |
| 795 | .cra_ablkcipher = { |
| 796 | .setkey = lq_des_setkey, |
| 797 | .encrypt = lq_ecb_des_encrypt, |
| 798 | .decrypt = lq_ecb_des_decrypt, |
| 799 | .geniv = "eseqiv", |
| 800 | .min_keysize = DES_KEY_SIZE, |
| 801 | .max_keysize = DES_KEY_SIZE, |
| 802 | .ivsize = DES_BLOCK_SIZE, |
| 803 | } |
| 804 | } |
| 805 | },{ |
| 806 | .alg = { |
| 807 | .cra_name = "cbc(des)", |
| 808 | .cra_driver_name = "lqdeu-cbc(des)", |
| 809 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
| 810 | .cra_blocksize = DES_BLOCK_SIZE, |
| 811 | .cra_ctxsize = sizeof(struct des_ctx), |
| 812 | .cra_type = &crypto_ablkcipher_type, |
| 813 | .cra_priority = 300, |
| 814 | .cra_module = THIS_MODULE, |
| 815 | .cra_ablkcipher = { |
| 816 | .setkey = lq_des_setkey, |
| 817 | .encrypt = lq_cbc_des_encrypt, |
| 818 | .decrypt = lq_cbc_des_decrypt, |
| 819 | .geniv = "eseqiv", |
| 820 | .min_keysize = DES3_EDE_KEY_SIZE, |
| 821 | .max_keysize = DES3_EDE_KEY_SIZE, |
| 822 | .ivsize = DES3_EDE_BLOCK_SIZE, |
| 823 | } |
| 824 | } |
| 825 | },{ |
| 826 | .alg = { |
| 827 | .cra_name = "des3_ede", |
| 828 | .cra_driver_name = "lqdeu-des3_ede", |
| 829 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
| 830 | .cra_blocksize = DES_BLOCK_SIZE, |
| 831 | .cra_ctxsize = sizeof(struct des_ctx), |
| 832 | .cra_type = &crypto_ablkcipher_type, |
| 833 | .cra_priority = 300, |
| 834 | .cra_module = THIS_MODULE, |
| 835 | .cra_ablkcipher = { |
| 836 | .setkey = lq_des3_ede_setkey, |
| 837 | .encrypt = lq_des_encrypt, |
| 838 | .decrypt = lq_des_decrypt, |
| 839 | .geniv = "eseqiv", |
| 840 | .min_keysize = DES_KEY_SIZE, |
| 841 | .max_keysize = DES_KEY_SIZE, |
| 842 | .ivsize = DES_BLOCK_SIZE, |
| 843 | } |
| 844 | } |
| 845 | },{ |
| 846 | .alg = { |
| 847 | .cra_name = "ecb(des3_ede)", |
| 848 | .cra_driver_name = "lqdeu-ecb(des3_ede)", |
| 849 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
| 850 | .cra_blocksize = DES_BLOCK_SIZE, |
| 851 | .cra_ctxsize = sizeof(struct des_ctx), |
| 852 | .cra_type = &crypto_ablkcipher_type, |
| 853 | .cra_priority = 300, |
| 854 | .cra_module = THIS_MODULE, |
| 855 | .cra_ablkcipher = { |
| 856 | .setkey = lq_des3_ede_setkey, |
| 857 | .encrypt = lq_ecb_des_encrypt, |
| 858 | .decrypt = lq_ecb_des_decrypt, |
| 859 | .geniv = "eseqiv", |
| 860 | .min_keysize = DES3_EDE_KEY_SIZE, |
| 861 | .max_keysize = DES3_EDE_KEY_SIZE, |
| 862 | .ivsize = DES3_EDE_BLOCK_SIZE, |
| 863 | } |
| 864 | } |
| 865 | },{ |
| 866 | .alg = { |
| 867 | .cra_name = "cbc(des3_ede)", |
| 868 | .cra_driver_name = "lqdeu-cbc(des3_ede)", |
| 869 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
| 870 | .cra_blocksize = DES_BLOCK_SIZE, |
| 871 | .cra_ctxsize = sizeof(struct des_ctx), |
| 872 | .cra_type = &crypto_ablkcipher_type, |
| 873 | .cra_priority = 300, |
| 874 | .cra_module = THIS_MODULE, |
| 875 | .cra_ablkcipher = { |
| 876 | .setkey = lq_des3_ede_setkey, |
| 877 | .encrypt = lq_cbc_des_encrypt, |
| 878 | .decrypt = lq_cbc_des_decrypt, |
| 879 | .geniv = "eseqiv", |
| 880 | .min_keysize = DES3_EDE_KEY_SIZE, |
| 881 | .max_keysize = DES3_EDE_KEY_SIZE, |
| 882 | .ivsize = DES3_EDE_BLOCK_SIZE, |
| 883 | } |
| 884 | } |
| 885 | } |
| 886 | }; |
| 887 | |
| 888 | /*! \fn int __init lqdeu_async_des_init (void) |
| 889 | * \ingroup IFX_DES_FUNCTIONS |
| 890 | * \brief initialize des driver |
| 891 | */ |
| 892 | int __init lqdeu_async_des_init (void) |
| 893 | { |
| 894 | int i, j, ret = -EINVAL; |
| 895 | |
| 896 | #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)) |
| 897 | if (!disable_multiblock) { |
| 898 | ifxdeu_des_alg.cra_u.cipher.cia_max_nbytes = DES_BLOCK_SIZE; //(size_t)-1; |
| 899 | ifxdeu_des_alg.cra_u.cipher.cia_req_align = 16; |
| 900 | ifxdeu_des_alg.cra_u.cipher.cia_ecb = ifx_deu_des_ecb; |
| 901 | ifxdeu_des_alg.cra_u.cipher.cia_cbc = ifx_deu_des_cbc; |
| 902 | ifxdeu_des_alg.cra_u.cipher.cia_cfb = ifx_deu_des_cfb; |
| 903 | ifxdeu_des_alg.cra_u.cipher.cia_ofb = ifx_deu_des_ofb; |
| 904 | } |
| 905 | #endif |
| 906 | for (i = 0; i < ARRAY_SIZE(des_drivers_alg); i++) { |
| 907 | ret = crypto_register_alg(&des_drivers_alg[i].alg); |
| 908 | //printk("driver: %s\n", des_drivers_alg[i].alg.cra_name); |
| 909 | if (ret) |
| 910 | goto des_err; |
| 911 | } |
| 912 | |
| 913 | des_chip_init(); |
| 914 | CRTCL_SECT_INIT; |
| 915 | |
| 916 | |
| 917 | printk (KERN_NOTICE "IFX DEU DES initialized%s%s.\n", disable_multiblock ? "" : " (multiblock)", disable_deudma ? "" : " (DMA)"); |
| 918 | return ret; |
| 919 | |
| 920 | des_err: |
| 921 | for (j = 0; j < i; j++) |
| 922 | crypto_unregister_alg(&des_drivers_alg[i].alg); |
| 923 | |
| 924 | printk(KERN_ERR "Lantiq %s driver initialization failed!\n", (char *)&des_drivers_alg[i].alg.cra_driver_name); |
| 925 | return ret; |
| 926 | |
| 927 | cbc_des3_ede_err: |
| 928 | for (i = 0; i < ARRAY_SIZE(des_drivers_alg); i++) { |
| 929 | if (!strcmp((char *)&des_drivers_alg[i].alg.cra_name, "cbc(des3_ede)")) |
| 930 | crypto_unregister_alg(&des_drivers_alg[i].alg); |
| 931 | } |
| 932 | |
| 933 | printk(KERN_ERR "Lantiq %s driver initialization failed!\n", (char *)&des_drivers_alg[i].alg.cra_driver_name); |
| 934 | return ret; |
| 935 | } |
| 936 | |
| 937 | /*! \fn void __exit lqdeu_fini_async_des (void) |
| 938 | * \ingroup IFX_DES_FUNCTIONS |
| 939 | * \brief unregister des driver |
| 940 | */ |
| 941 | void __exit lqdeu_fini_async_des (void) |
| 942 | { |
| 943 | int i; |
| 944 | |
| 945 | for (i = 0; i < ARRAY_SIZE(des_drivers_alg); i++) |
| 946 | crypto_unregister_alg(&des_drivers_alg[i].alg); |
| 947 | |
| 948 | des_queue->hw_status = DES_COMPLETED; |
| 949 | DEU_WAKEUP_EVENT(deu_dma_priv.deu_thread_wait, DES_ASYNC_EVENT, |
| 950 | deu_dma_priv.des_event_flags); |
| 951 | |
| 952 | kfree(des_queue); |
| 953 | } |
| 954 | |
| 955 | |
