1 /* 2 * talitos - Freescale Integrated Security Engine (SEC) device driver 3 * 4 * Copyright (c) 2008-2010 Freescale Semiconductor, Inc. 5 * 6 * Scatterlist Crypto API glue code copied from files with the following: 7 * Copyright (c) 2006-2007 Herbert Xu <herbert@gondor.apana.org.au> 8 * 9 * Crypto algorithm registration code copied from hifn driver: 10 * 2007+ Copyright (c) Evgeniy Polyakov <johnpol@2ka.mipt.ru> 11 * All rights reserved. 12 * 13 * This program is free software; you can redistribute it and/or modify 14 * it under the terms of the GNU General Public License as published by 15 * the Free Software Foundation; either version 2 of the License, or 16 * (at your option) any later version. 17 * 18 * This program is distributed in the hope that it will be useful, 19 * but WITHOUT ANY WARRANTY; without even the implied warranty of 20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 * GNU General Public License for more details. 22 * 23 * You should have received a copy of the GNU General Public License 24 * along with this program; if not, write to the Free Software 25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 26 */ 27 28 #include <linux/kernel.h> 29 #include <linux/module.h> 30 #include <linux/mod_devicetable.h> 31 #include <linux/device.h> 32 #include <linux/interrupt.h> 33 #include <linux/crypto.h> 34 #include <linux/hw_random.h> 35 #include <linux/of_platform.h> 36 #include <linux/dma-mapping.h> 37 #include <linux/io.h> 38 #include <linux/spinlock.h> 39 #include <linux/rtnetlink.h> 40 #include <linux/slab.h> 41 42 #include <crypto/algapi.h> 43 #include <crypto/aes.h> 44 #include <crypto/des.h> 45 #include <crypto/sha.h> 46 #include <crypto/md5.h> 47 #include <crypto/aead.h> 48 #include <crypto/authenc.h> 49 #include <crypto/skcipher.h> 50 #include <crypto/hash.h> 51 #include <crypto/internal/hash.h> 52 #include <crypto/scatterwalk.h> 53 54 #include "talitos.h" 55 56 #define TALITOS_TIMEOUT 100000 57 #define TALITOS_MAX_DATA_LEN 65535 58 59 #define DESC_TYPE(desc_hdr) ((be32_to_cpu(desc_hdr) >> 3) & 0x1f) 60 #define PRIMARY_EU(desc_hdr) ((be32_to_cpu(desc_hdr) >> 28) & 0xf) 61 #define SECONDARY_EU(desc_hdr) ((be32_to_cpu(desc_hdr) >> 16) & 0xf) 62 63 /* descriptor pointer entry */ 64 struct talitos_ptr { 65 __be16 len; /* length */ 66 u8 j_extent; /* jump to sg link table and/or extent */ 67 u8 eptr; /* extended address */ 68 __be32 ptr; /* address */ 69 }; 70 71 static const struct talitos_ptr zero_entry = { 72 .len = 0, 73 .j_extent = 0, 74 .eptr = 0, 75 .ptr = 0 76 }; 77 78 /* descriptor */ 79 struct talitos_desc { 80 __be32 hdr; /* header high bits */ 81 __be32 hdr_lo; /* header low bits */ 82 struct talitos_ptr ptr[7]; /* ptr/len pair array */ 83 }; 84 85 /** 86 * talitos_request - descriptor submission request 87 * @desc: descriptor pointer (kernel virtual) 88 * @dma_desc: descriptor's physical bus address 89 * @callback: whom to call when descriptor processing is done 90 * @context: caller context (optional) 91 */ 92 struct talitos_request { 93 struct talitos_desc *desc; 94 dma_addr_t dma_desc; 95 void (*callback) (struct device *dev, struct talitos_desc *desc, 96 void *context, int error); 97 void *context; 98 }; 99 100 /* per-channel fifo management */ 101 struct talitos_channel { 102 /* request fifo */ 103 struct talitos_request *fifo; 104 105 /* number of requests pending in channel h/w fifo */ 106 atomic_t submit_count ____cacheline_aligned; 107 108 /* request submission (head) lock */ 109 spinlock_t head_lock ____cacheline_aligned; 110 /* index to next free descriptor request */ 111 int head; 112 113 /* request release (tail) lock */ 114 spinlock_t tail_lock ____cacheline_aligned; 115 /* index to next in-progress/done descriptor request */ 116 int tail; 117 }; 118 119 struct talitos_private { 120 struct device *dev; 121 struct platform_device *ofdev; 122 void __iomem *reg; 123 int irq; 124 125 /* SEC version geometry (from device tree node) */ 126 unsigned int num_channels; 127 unsigned int chfifo_len; 128 unsigned int exec_units; 129 unsigned int desc_types; 130 131 /* SEC Compatibility info */ 132 unsigned long features; 133 134 /* 135 * length of the request fifo 136 * fifo_len is chfifo_len rounded up to next power of 2 137 * so we can use bitwise ops to wrap 138 */ 139 unsigned int fifo_len; 140 141 struct talitos_channel *chan; 142 143 /* next channel to be assigned next incoming descriptor */ 144 atomic_t last_chan ____cacheline_aligned; 145 146 /* request callback tasklet */ 147 struct tasklet_struct done_task; 148 149 /* list of registered algorithms */ 150 struct list_head alg_list; 151 152 /* hwrng device */ 153 struct hwrng rng; 154 }; 155 156 /* .features flag */ 157 #define TALITOS_FTR_SRC_LINK_TBL_LEN_INCLUDES_EXTENT 0x00000001 158 #define TALITOS_FTR_HW_AUTH_CHECK 0x00000002 159 #define TALITOS_FTR_SHA224_HWINIT 0x00000004 160 161 static void to_talitos_ptr(struct talitos_ptr *talitos_ptr, dma_addr_t dma_addr) 162 { 163 talitos_ptr->ptr = cpu_to_be32(lower_32_bits(dma_addr)); 164 talitos_ptr->eptr = cpu_to_be32(upper_32_bits(dma_addr)); 165 } 166 167 /* 168 * map virtual single (contiguous) pointer to h/w descriptor pointer 169 */ 170 static void map_single_talitos_ptr(struct device *dev, 171 struct talitos_ptr *talitos_ptr, 172 unsigned short len, void *data, 173 unsigned char extent, 174 enum dma_data_direction dir) 175 { 176 dma_addr_t dma_addr = dma_map_single(dev, data, len, dir); 177 178 talitos_ptr->len = cpu_to_be16(len); 179 to_talitos_ptr(talitos_ptr, dma_addr); 180 talitos_ptr->j_extent = extent; 181 } 182 183 /* 184 * unmap bus single (contiguous) h/w descriptor pointer 185 */ 186 static void unmap_single_talitos_ptr(struct device *dev, 187 struct talitos_ptr *talitos_ptr, 188 enum dma_data_direction dir) 189 { 190 dma_unmap_single(dev, be32_to_cpu(talitos_ptr->ptr), 191 be16_to_cpu(talitos_ptr->len), dir); 192 } 193 194 static int reset_channel(struct device *dev, int ch) 195 { 196 struct talitos_private *priv = dev_get_drvdata(dev); 197 unsigned int timeout = TALITOS_TIMEOUT; 198 199 setbits32(priv->reg + TALITOS_CCCR(ch), TALITOS_CCCR_RESET); 200 201 while ((in_be32(priv->reg + TALITOS_CCCR(ch)) & TALITOS_CCCR_RESET) 202 && --timeout) 203 cpu_relax(); 204 205 if (timeout == 0) { 206 dev_err(dev, "failed to reset channel %d\n", ch); 207 return -EIO; 208 } 209 210 /* set 36-bit addressing, done writeback enable and done IRQ enable */ 211 setbits32(priv->reg + TALITOS_CCCR_LO(ch), TALITOS_CCCR_LO_EAE | 212 TALITOS_CCCR_LO_CDWE | TALITOS_CCCR_LO_CDIE); 213 214 /* and ICCR writeback, if available */ 215 if (priv->features & TALITOS_FTR_HW_AUTH_CHECK) 216 setbits32(priv->reg + TALITOS_CCCR_LO(ch), 217 TALITOS_CCCR_LO_IWSE); 218 219 return 0; 220 } 221 222 static int reset_device(struct device *dev) 223 { 224 struct talitos_private *priv = dev_get_drvdata(dev); 225 unsigned int timeout = TALITOS_TIMEOUT; 226 227 setbits32(priv->reg + TALITOS_MCR, TALITOS_MCR_SWR); 228 229 while ((in_be32(priv->reg + TALITOS_MCR) & TALITOS_MCR_SWR) 230 && --timeout) 231 cpu_relax(); 232 233 if (timeout == 0) { 234 dev_err(dev, "failed to reset device\n"); 235 return -EIO; 236 } 237 238 return 0; 239 } 240 241 /* 242 * Reset and initialize the device 243 */ 244 static int init_device(struct device *dev) 245 { 246 struct talitos_private *priv = dev_get_drvdata(dev); 247 int ch, err; 248 249 /* 250 * Master reset 251 * errata documentation: warning: certain SEC interrupts 252 * are not fully cleared by writing the MCR:SWR bit, 253 * set bit twice to completely reset 254 */ 255 err = reset_device(dev); 256 if (err) 257 return err; 258 259 err = reset_device(dev); 260 if (err) 261 return err; 262 263 /* reset channels */ 264 for (ch = 0; ch < priv->num_channels; ch++) { 265 err = reset_channel(dev, ch); 266 if (err) 267 return err; 268 } 269 270 /* enable channel done and error interrupts */ 271 setbits32(priv->reg + TALITOS_IMR, TALITOS_IMR_INIT); 272 setbits32(priv->reg + TALITOS_IMR_LO, TALITOS_IMR_LO_INIT); 273 274 /* disable integrity check error interrupts (use writeback instead) */ 275 if (priv->features & TALITOS_FTR_HW_AUTH_CHECK) 276 setbits32(priv->reg + TALITOS_MDEUICR_LO, 277 TALITOS_MDEUICR_LO_ICE); 278 279 return 0; 280 } 281 282 /** 283 * talitos_submit - submits a descriptor to the device for processing 284 * @dev: the SEC device to be used 285 * @desc: the descriptor to be processed by the device 286 * @callback: whom to call when processing is complete 287 * @context: a handle for use by caller (optional) 288 * 289 * desc must contain valid dma-mapped (bus physical) address pointers. 290 * callback must check err and feedback in descriptor header 291 * for device processing status. 292 */ 293 static int talitos_submit(struct device *dev, struct talitos_desc *desc, 294 void (*callback)(struct device *dev, 295 struct talitos_desc *desc, 296 void *context, int error), 297 void *context) 298 { 299 struct talitos_private *priv = dev_get_drvdata(dev); 300 struct talitos_request *request; 301 unsigned long flags, ch; 302 int head; 303 304 /* select done notification */ 305 desc->hdr |= DESC_HDR_DONE_NOTIFY; 306 307 /* emulate SEC's round-robin channel fifo polling scheme */ 308 ch = atomic_inc_return(&priv->last_chan) & (priv->num_channels - 1); 309 310 spin_lock_irqsave(&priv->chan[ch].head_lock, flags); 311 312 if (!atomic_inc_not_zero(&priv->chan[ch].submit_count)) { 313 /* h/w fifo is full */ 314 spin_unlock_irqrestore(&priv->chan[ch].head_lock, flags); 315 return -EAGAIN; 316 } 317 318 head = priv->chan[ch].head; 319 request = &priv->chan[ch].fifo[head]; 320 321 /* map descriptor and save caller data */ 322 request->dma_desc = dma_map_single(dev, desc, sizeof(*desc), 323 DMA_BIDIRECTIONAL); 324 request->callback = callback; 325 request->context = context; 326 327 /* increment fifo head */ 328 priv->chan[ch].head = (priv->chan[ch].head + 1) & (priv->fifo_len - 1); 329 330 smp_wmb(); 331 request->desc = desc; 332 333 /* GO! */ 334 wmb(); 335 out_be32(priv->reg + TALITOS_FF(ch), 336 cpu_to_be32(upper_32_bits(request->dma_desc))); 337 out_be32(priv->reg + TALITOS_FF_LO(ch), 338 cpu_to_be32(lower_32_bits(request->dma_desc))); 339 340 spin_unlock_irqrestore(&priv->chan[ch].head_lock, flags); 341 342 return -EINPROGRESS; 343 } 344 345 /* 346 * process what was done, notify callback of error if not 347 */ 348 static void flush_channel(struct device *dev, int ch, int error, int reset_ch) 349 { 350 struct talitos_private *priv = dev_get_drvdata(dev); 351 struct talitos_request *request, saved_req; 352 unsigned long flags; 353 int tail, status; 354 355 spin_lock_irqsave(&priv->chan[ch].tail_lock, flags); 356 357 tail = priv->chan[ch].tail; 358 while (priv->chan[ch].fifo[tail].desc) { 359 request = &priv->chan[ch].fifo[tail]; 360 361 /* descriptors with their done bits set don't get the error */ 362 rmb(); 363 if ((request->desc->hdr & DESC_HDR_DONE) == DESC_HDR_DONE) 364 status = 0; 365 else 366 if (!error) 367 break; 368 else 369 status = error; 370 371 dma_unmap_single(dev, request->dma_desc, 372 sizeof(struct talitos_desc), 373 DMA_BIDIRECTIONAL); 374 375 /* copy entries so we can call callback outside lock */ 376 saved_req.desc = request->desc; 377 saved_req.callback = request->callback; 378 saved_req.context = request->context; 379 380 /* release request entry in fifo */ 381 smp_wmb(); 382 request->desc = NULL; 383 384 /* increment fifo tail */ 385 priv->chan[ch].tail = (tail + 1) & (priv->fifo_len - 1); 386 387 spin_unlock_irqrestore(&priv->chan[ch].tail_lock, flags); 388 389 atomic_dec(&priv->chan[ch].submit_count); 390 391 saved_req.callback(dev, saved_req.desc, saved_req.context, 392 status); 393 /* channel may resume processing in single desc error case */ 394 if (error && !reset_ch && status == error) 395 return; 396 spin_lock_irqsave(&priv->chan[ch].tail_lock, flags); 397 tail = priv->chan[ch].tail; 398 } 399 400 spin_unlock_irqrestore(&priv->chan[ch].tail_lock, flags); 401 } 402 403 /* 404 * process completed requests for channels that have done status 405 */ 406 static void talitos_done(unsigned long data) 407 { 408 struct device *dev = (struct device *)data; 409 struct talitos_private *priv = dev_get_drvdata(dev); 410 int ch; 411 412 for (ch = 0; ch < priv->num_channels; ch++) 413 flush_channel(dev, ch, 0, 0); 414 415 /* At this point, all completed channels have been processed. 416 * Unmask done interrupts for channels completed later on. 417 */ 418 setbits32(priv->reg + TALITOS_IMR, TALITOS_IMR_INIT); 419 setbits32(priv->reg + TALITOS_IMR_LO, TALITOS_IMR_LO_INIT); 420 } 421 422 /* 423 * locate current (offending) descriptor 424 */ 425 static struct talitos_desc *current_desc(struct device *dev, int ch) 426 { 427 struct talitos_private *priv = dev_get_drvdata(dev); 428 int tail = priv->chan[ch].tail; 429 dma_addr_t cur_desc; 430 431 cur_desc = in_be32(priv->reg + TALITOS_CDPR_LO(ch)); 432 433 while (priv->chan[ch].fifo[tail].dma_desc != cur_desc) { 434 tail = (tail + 1) & (priv->fifo_len - 1); 435 if (tail == priv->chan[ch].tail) { 436 dev_err(dev, "couldn't locate current descriptor\n"); 437 return NULL; 438 } 439 } 440 441 return priv->chan[ch].fifo[tail].desc; 442 } 443 444 /* 445 * user diagnostics; report root cause of error based on execution unit status 446 */ 447 static void report_eu_error(struct device *dev, int ch, 448 struct talitos_desc *desc) 449 { 450 struct talitos_private *priv = dev_get_drvdata(dev); 451 int i; 452 453 switch (desc->hdr & DESC_HDR_SEL0_MASK) { 454 case DESC_HDR_SEL0_AFEU: 455 dev_err(dev, "AFEUISR 0x%08x_%08x\n", 456 in_be32(priv->reg + TALITOS_AFEUISR), 457 in_be32(priv->reg + TALITOS_AFEUISR_LO)); 458 break; 459 case DESC_HDR_SEL0_DEU: 460 dev_err(dev, "DEUISR 0x%08x_%08x\n", 461 in_be32(priv->reg + TALITOS_DEUISR), 462 in_be32(priv->reg + TALITOS_DEUISR_LO)); 463 break; 464 case DESC_HDR_SEL0_MDEUA: 465 case DESC_HDR_SEL0_MDEUB: 466 dev_err(dev, "MDEUISR 0x%08x_%08x\n", 467 in_be32(priv->reg + TALITOS_MDEUISR), 468 in_be32(priv->reg + TALITOS_MDEUISR_LO)); 469 break; 470 case DESC_HDR_SEL0_RNG: 471 dev_err(dev, "RNGUISR 0x%08x_%08x\n", 472 in_be32(priv->reg + TALITOS_RNGUISR), 473 in_be32(priv->reg + TALITOS_RNGUISR_LO)); 474 break; 475 case DESC_HDR_SEL0_PKEU: 476 dev_err(dev, "PKEUISR 0x%08x_%08x\n", 477 in_be32(priv->reg + TALITOS_PKEUISR), 478 in_be32(priv->reg + TALITOS_PKEUISR_LO)); 479 break; 480 case DESC_HDR_SEL0_AESU: 481 dev_err(dev, "AESUISR 0x%08x_%08x\n", 482 in_be32(priv->reg + TALITOS_AESUISR), 483 in_be32(priv->reg + TALITOS_AESUISR_LO)); 484 break; 485 case DESC_HDR_SEL0_CRCU: 486 dev_err(dev, "CRCUISR 0x%08x_%08x\n", 487 in_be32(priv->reg + TALITOS_CRCUISR), 488 in_be32(priv->reg + TALITOS_CRCUISR_LO)); 489 break; 490 case DESC_HDR_SEL0_KEU: 491 dev_err(dev, "KEUISR 0x%08x_%08x\n", 492 in_be32(priv->reg + TALITOS_KEUISR), 493 in_be32(priv->reg + TALITOS_KEUISR_LO)); 494 break; 495 } 496 497 switch (desc->hdr & DESC_HDR_SEL1_MASK) { 498 case DESC_HDR_SEL1_MDEUA: 499 case DESC_HDR_SEL1_MDEUB: 500 dev_err(dev, "MDEUISR 0x%08x_%08x\n", 501 in_be32(priv->reg + TALITOS_MDEUISR), 502 in_be32(priv->reg + TALITOS_MDEUISR_LO)); 503 break; 504 case DESC_HDR_SEL1_CRCU: 505 dev_err(dev, "CRCUISR 0x%08x_%08x\n", 506 in_be32(priv->reg + TALITOS_CRCUISR), 507 in_be32(priv->reg + TALITOS_CRCUISR_LO)); 508 break; 509 } 510 511 for (i = 0; i < 8; i++) 512 dev_err(dev, "DESCBUF 0x%08x_%08x\n", 513 in_be32(priv->reg + TALITOS_DESCBUF(ch) + 8*i), 514 in_be32(priv->reg + TALITOS_DESCBUF_LO(ch) + 8*i)); 515 } 516 517 /* 518 * recover from error interrupts 519 */ 520 static void talitos_error(unsigned long data, u32 isr, u32 isr_lo) 521 { 522 struct device *dev = (struct device *)data; 523 struct talitos_private *priv = dev_get_drvdata(dev); 524 unsigned int timeout = TALITOS_TIMEOUT; 525 int ch, error, reset_dev = 0, reset_ch = 0; 526 u32 v, v_lo; 527 528 for (ch = 0; ch < priv->num_channels; ch++) { 529 /* skip channels without errors */ 530 if (!(isr & (1 << (ch * 2 + 1)))) 531 continue; 532 533 error = -EINVAL; 534 535 v = in_be32(priv->reg + TALITOS_CCPSR(ch)); 536 v_lo = in_be32(priv->reg + TALITOS_CCPSR_LO(ch)); 537 538 if (v_lo & TALITOS_CCPSR_LO_DOF) { 539 dev_err(dev, "double fetch fifo overflow error\n"); 540 error = -EAGAIN; 541 reset_ch = 1; 542 } 543 if (v_lo & TALITOS_CCPSR_LO_SOF) { 544 /* h/w dropped descriptor */ 545 dev_err(dev, "single fetch fifo overflow error\n"); 546 error = -EAGAIN; 547 } 548 if (v_lo & TALITOS_CCPSR_LO_MDTE) 549 dev_err(dev, "master data transfer error\n"); 550 if (v_lo & TALITOS_CCPSR_LO_SGDLZ) 551 dev_err(dev, "s/g data length zero error\n"); 552 if (v_lo & TALITOS_CCPSR_LO_FPZ) 553 dev_err(dev, "fetch pointer zero error\n"); 554 if (v_lo & TALITOS_CCPSR_LO_IDH) 555 dev_err(dev, "illegal descriptor header error\n"); 556 if (v_lo & TALITOS_CCPSR_LO_IEU) 557 dev_err(dev, "invalid execution unit error\n"); 558 if (v_lo & TALITOS_CCPSR_LO_EU) 559 report_eu_error(dev, ch, current_desc(dev, ch)); 560 if (v_lo & TALITOS_CCPSR_LO_GB) 561 dev_err(dev, "gather boundary error\n"); 562 if (v_lo & TALITOS_CCPSR_LO_GRL) 563 dev_err(dev, "gather return/length error\n"); 564 if (v_lo & TALITOS_CCPSR_LO_SB) 565 dev_err(dev, "scatter boundary error\n"); 566 if (v_lo & TALITOS_CCPSR_LO_SRL) 567 dev_err(dev, "scatter return/length error\n"); 568 569 flush_channel(dev, ch, error, reset_ch); 570 571 if (reset_ch) { 572 reset_channel(dev, ch); 573 } else { 574 setbits32(priv->reg + TALITOS_CCCR(ch), 575 TALITOS_CCCR_CONT); 576 setbits32(priv->reg + TALITOS_CCCR_LO(ch), 0); 577 while ((in_be32(priv->reg + TALITOS_CCCR(ch)) & 578 TALITOS_CCCR_CONT) && --timeout) 579 cpu_relax(); 580 if (timeout == 0) { 581 dev_err(dev, "failed to restart channel %d\n", 582 ch); 583 reset_dev = 1; 584 } 585 } 586 } 587 if (reset_dev || isr & ~TALITOS_ISR_CHERR || isr_lo) { 588 dev_err(dev, "done overflow, internal time out, or rngu error: " 589 "ISR 0x%08x_%08x\n", isr, isr_lo); 590 591 /* purge request queues */ 592 for (ch = 0; ch < priv->num_channels; ch++) 593 flush_channel(dev, ch, -EIO, 1); 594 595 /* reset and reinitialize the device */ 596 init_device(dev); 597 } 598 } 599 600 static irqreturn_t talitos_interrupt(int irq, void *data) 601 { 602 struct device *dev = data; 603 struct talitos_private *priv = dev_get_drvdata(dev); 604 u32 isr, isr_lo; 605 606 isr = in_be32(priv->reg + TALITOS_ISR); 607 isr_lo = in_be32(priv->reg + TALITOS_ISR_LO); 608 /* Acknowledge interrupt */ 609 out_be32(priv->reg + TALITOS_ICR, isr); 610 out_be32(priv->reg + TALITOS_ICR_LO, isr_lo); 611 612 if (unlikely((isr & ~TALITOS_ISR_CHDONE) || isr_lo)) 613 talitos_error((unsigned long)data, isr, isr_lo); 614 else 615 if (likely(isr & TALITOS_ISR_CHDONE)) { 616 /* mask further done interrupts. */ 617 clrbits32(priv->reg + TALITOS_IMR, TALITOS_IMR_DONE); 618 /* done_task will unmask done interrupts at exit */ 619 tasklet_schedule(&priv->done_task); 620 } 621 622 return (isr || isr_lo) ? IRQ_HANDLED : IRQ_NONE; 623 } 624 625 /* 626 * hwrng 627 */ 628 static int talitos_rng_data_present(struct hwrng *rng, int wait) 629 { 630 struct device *dev = (struct device *)rng->priv; 631 struct talitos_private *priv = dev_get_drvdata(dev); 632 u32 ofl; 633 int i; 634 635 for (i = 0; i < 20; i++) { 636 ofl = in_be32(priv->reg + TALITOS_RNGUSR_LO) & 637 TALITOS_RNGUSR_LO_OFL; 638 if (ofl || !wait) 639 break; 640 udelay(10); 641 } 642 643 return !!ofl; 644 } 645 646 static int talitos_rng_data_read(struct hwrng *rng, u32 *data) 647 { 648 struct device *dev = (struct device *)rng->priv; 649 struct talitos_private *priv = dev_get_drvdata(dev); 650 651 /* rng fifo requires 64-bit accesses */ 652 *data = in_be32(priv->reg + TALITOS_RNGU_FIFO); 653 *data = in_be32(priv->reg + TALITOS_RNGU_FIFO_LO); 654 655 return sizeof(u32); 656 } 657 658 static int talitos_rng_init(struct hwrng *rng) 659 { 660 struct device *dev = (struct device *)rng->priv; 661 struct talitos_private *priv = dev_get_drvdata(dev); 662 unsigned int timeout = TALITOS_TIMEOUT; 663 664 setbits32(priv->reg + TALITOS_RNGURCR_LO, TALITOS_RNGURCR_LO_SR); 665 while (!(in_be32(priv->reg + TALITOS_RNGUSR_LO) & TALITOS_RNGUSR_LO_RD) 666 && --timeout) 667 cpu_relax(); 668 if (timeout == 0) { 669 dev_err(dev, "failed to reset rng hw\n"); 670 return -ENODEV; 671 } 672 673 /* start generating */ 674 setbits32(priv->reg + TALITOS_RNGUDSR_LO, 0); 675 676 return 0; 677 } 678 679 static int talitos_register_rng(struct device *dev) 680 { 681 struct talitos_private *priv = dev_get_drvdata(dev); 682 683 priv->rng.name = dev_driver_string(dev), 684 priv->rng.init = talitos_rng_init, 685 priv->rng.data_present = talitos_rng_data_present, 686 priv->rng.data_read = talitos_rng_data_read, 687 priv->rng.priv = (unsigned long)dev; 688 689 return hwrng_register(&priv->rng); 690 } 691 692 static void talitos_unregister_rng(struct device *dev) 693 { 694 struct talitos_private *priv = dev_get_drvdata(dev); 695 696 hwrng_unregister(&priv->rng); 697 } 698 699 /* 700 * crypto alg 701 */ 702 #define TALITOS_CRA_PRIORITY 3000 703 #define TALITOS_MAX_KEY_SIZE 64 704 #define TALITOS_MAX_IV_LENGTH 16 /* max of AES_BLOCK_SIZE, DES3_EDE_BLOCK_SIZE */ 705 706 #define MD5_BLOCK_SIZE 64 707 708 struct talitos_ctx { 709 struct device *dev; 710 __be32 desc_hdr_template; 711 u8 key[TALITOS_MAX_KEY_SIZE]; 712 u8 iv[TALITOS_MAX_IV_LENGTH]; 713 unsigned int keylen; 714 unsigned int enckeylen; 715 unsigned int authkeylen; 716 unsigned int authsize; 717 }; 718 719 #define HASH_MAX_BLOCK_SIZE SHA512_BLOCK_SIZE 720 #define TALITOS_MDEU_MAX_CONTEXT_SIZE TALITOS_MDEU_CONTEXT_SIZE_SHA384_SHA512 721 722 struct talitos_ahash_req_ctx { 723 u32 hw_context[TALITOS_MDEU_MAX_CONTEXT_SIZE / sizeof(u32)]; 724 unsigned int hw_context_size; 725 u8 buf[HASH_MAX_BLOCK_SIZE]; 726 u8 bufnext[HASH_MAX_BLOCK_SIZE]; 727 unsigned int swinit; 728 unsigned int first; 729 unsigned int last; 730 unsigned int to_hash_later; 731 u64 nbuf; 732 struct scatterlist bufsl[2]; 733 struct scatterlist *psrc; 734 }; 735 736 static int aead_setauthsize(struct crypto_aead *authenc, 737 unsigned int authsize) 738 { 739 struct talitos_ctx *ctx = crypto_aead_ctx(authenc); 740 741 ctx->authsize = authsize; 742 743 return 0; 744 } 745 746 static int aead_setkey(struct crypto_aead *authenc, 747 const u8 *key, unsigned int keylen) 748 { 749 struct talitos_ctx *ctx = crypto_aead_ctx(authenc); 750 struct rtattr *rta = (void *)key; 751 struct crypto_authenc_key_param *param; 752 unsigned int authkeylen; 753 unsigned int enckeylen; 754 755 if (!RTA_OK(rta, keylen)) 756 goto badkey; 757 758 if (rta->rta_type != CRYPTO_AUTHENC_KEYA_PARAM) 759 goto badkey; 760 761 if (RTA_PAYLOAD(rta) < sizeof(*param)) 762 goto badkey; 763 764 param = RTA_DATA(rta); 765 enckeylen = be32_to_cpu(param->enckeylen); 766 767 key += RTA_ALIGN(rta->rta_len); 768 keylen -= RTA_ALIGN(rta->rta_len); 769 770 if (keylen < enckeylen) 771 goto badkey; 772 773 authkeylen = keylen - enckeylen; 774 775 if (keylen > TALITOS_MAX_KEY_SIZE) 776 goto badkey; 777 778 memcpy(&ctx->key, key, keylen); 779 780 ctx->keylen = keylen; 781 ctx->enckeylen = enckeylen; 782 ctx->authkeylen = authkeylen; 783 784 return 0; 785 786 badkey: 787 crypto_aead_set_flags(authenc, CRYPTO_TFM_RES_BAD_KEY_LEN); 788 return -EINVAL; 789 } 790 791 /* 792 * talitos_edesc - s/w-extended descriptor 793 * @src_nents: number of segments in input scatterlist 794 * @dst_nents: number of segments in output scatterlist 795 * @dma_len: length of dma mapped link_tbl space 796 * @dma_link_tbl: bus physical address of link_tbl 797 * @desc: h/w descriptor 798 * @link_tbl: input and output h/w link tables (if {src,dst}_nents > 1) 799 * 800 * if decrypting (with authcheck), or either one of src_nents or dst_nents 801 * is greater than 1, an integrity check value is concatenated to the end 802 * of link_tbl data 803 */ 804 struct talitos_edesc { 805 int src_nents; 806 int dst_nents; 807 int src_is_chained; 808 int dst_is_chained; 809 int dma_len; 810 dma_addr_t dma_link_tbl; 811 struct talitos_desc desc; 812 struct talitos_ptr link_tbl[0]; 813 }; 814 815 static int talitos_map_sg(struct device *dev, struct scatterlist *sg, 816 unsigned int nents, enum dma_data_direction dir, 817 int chained) 818 { 819 if (unlikely(chained)) 820 while (sg) { 821 dma_map_sg(dev, sg, 1, dir); 822 sg = scatterwalk_sg_next(sg); 823 } 824 else 825 dma_map_sg(dev, sg, nents, dir); 826 return nents; 827 } 828 829 static void talitos_unmap_sg_chain(struct device *dev, struct scatterlist *sg, 830 enum dma_data_direction dir) 831 { 832 while (sg) { 833 dma_unmap_sg(dev, sg, 1, dir); 834 sg = scatterwalk_sg_next(sg); 835 } 836 } 837 838 static void talitos_sg_unmap(struct device *dev, 839 struct talitos_edesc *edesc, 840 struct scatterlist *src, 841 struct scatterlist *dst) 842 { 843 unsigned int src_nents = edesc->src_nents ? : 1; 844 unsigned int dst_nents = edesc->dst_nents ? : 1; 845 846 if (src != dst) { 847 if (edesc->src_is_chained) 848 talitos_unmap_sg_chain(dev, src, DMA_TO_DEVICE); 849 else 850 dma_unmap_sg(dev, src, src_nents, DMA_TO_DEVICE); 851 852 if (dst) { 853 if (edesc->dst_is_chained) 854 talitos_unmap_sg_chain(dev, dst, 855 DMA_FROM_DEVICE); 856 else 857 dma_unmap_sg(dev, dst, dst_nents, 858 DMA_FROM_DEVICE); 859 } 860 } else 861 if (edesc->src_is_chained) 862 talitos_unmap_sg_chain(dev, src, DMA_BIDIRECTIONAL); 863 else 864 dma_unmap_sg(dev, src, src_nents, DMA_BIDIRECTIONAL); 865 } 866 867 static void ipsec_esp_unmap(struct device *dev, 868 struct talitos_edesc *edesc, 869 struct aead_request *areq) 870 { 871 unmap_single_talitos_ptr(dev, &edesc->desc.ptr[6], DMA_FROM_DEVICE); 872 unmap_single_talitos_ptr(dev, &edesc->desc.ptr[3], DMA_TO_DEVICE); 873 unmap_single_talitos_ptr(dev, &edesc->desc.ptr[2], DMA_TO_DEVICE); 874 unmap_single_talitos_ptr(dev, &edesc->desc.ptr[0], DMA_TO_DEVICE); 875 876 dma_unmap_sg(dev, areq->assoc, 1, DMA_TO_DEVICE); 877 878 talitos_sg_unmap(dev, edesc, areq->src, areq->dst); 879 880 if (edesc->dma_len) 881 dma_unmap_single(dev, edesc->dma_link_tbl, edesc->dma_len, 882 DMA_BIDIRECTIONAL); 883 } 884 885 /* 886 * ipsec_esp descriptor callbacks 887 */ 888 static void ipsec_esp_encrypt_done(struct device *dev, 889 struct talitos_desc *desc, void *context, 890 int err) 891 { 892 struct aead_request *areq = context; 893 struct crypto_aead *authenc = crypto_aead_reqtfm(areq); 894 struct talitos_ctx *ctx = crypto_aead_ctx(authenc); 895 struct talitos_edesc *edesc; 896 struct scatterlist *sg; 897 void *icvdata; 898 899 edesc = container_of(desc, struct talitos_edesc, desc); 900 901 ipsec_esp_unmap(dev, edesc, areq); 902 903 /* copy the generated ICV to dst */ 904 if (edesc->dma_len) { 905 icvdata = &edesc->link_tbl[edesc->src_nents + 906 edesc->dst_nents + 2]; 907 sg = sg_last(areq->dst, edesc->dst_nents); 908 memcpy((char *)sg_virt(sg) + sg->length - ctx->authsize, 909 icvdata, ctx->authsize); 910 } 911 912 kfree(edesc); 913 914 aead_request_complete(areq, err); 915 } 916 917 static void ipsec_esp_decrypt_swauth_done(struct device *dev, 918 struct talitos_desc *desc, 919 void *context, int err) 920 { 921 struct aead_request *req = context; 922 struct crypto_aead *authenc = crypto_aead_reqtfm(req); 923 struct talitos_ctx *ctx = crypto_aead_ctx(authenc); 924 struct talitos_edesc *edesc; 925 struct scatterlist *sg; 926 void *icvdata; 927 928 edesc = container_of(desc, struct talitos_edesc, desc); 929 930 ipsec_esp_unmap(dev, edesc, req); 931 932 if (!err) { 933 /* auth check */ 934 if (edesc->dma_len) 935 icvdata = &edesc->link_tbl[edesc->src_nents + 936 edesc->dst_nents + 2]; 937 else 938 icvdata = &edesc->link_tbl[0]; 939 940 sg = sg_last(req->dst, edesc->dst_nents ? : 1); 941 err = memcmp(icvdata, (char *)sg_virt(sg) + sg->length - 942 ctx->authsize, ctx->authsize) ? -EBADMSG : 0; 943 } 944 945 kfree(edesc); 946 947 aead_request_complete(req, err); 948 } 949 950 static void ipsec_esp_decrypt_hwauth_done(struct device *dev, 951 struct talitos_desc *desc, 952 void *context, int err) 953 { 954 struct aead_request *req = context; 955 struct talitos_edesc *edesc; 956 957 edesc = container_of(desc, struct talitos_edesc, desc); 958 959 ipsec_esp_unmap(dev, edesc, req); 960 961 /* check ICV auth status */ 962 if (!err && ((desc->hdr_lo & DESC_HDR_LO_ICCR1_MASK) != 963 DESC_HDR_LO_ICCR1_PASS)) 964 err = -EBADMSG; 965 966 kfree(edesc); 967 968 aead_request_complete(req, err); 969 } 970 971 /* 972 * convert scatterlist to SEC h/w link table format 973 * stop at cryptlen bytes 974 */ 975 static int sg_to_link_tbl(struct scatterlist *sg, int sg_count, 976 int cryptlen, struct talitos_ptr *link_tbl_ptr) 977 { 978 int n_sg = sg_count; 979 980 while (n_sg--) { 981 to_talitos_ptr(link_tbl_ptr, sg_dma_address(sg)); 982 link_tbl_ptr->len = cpu_to_be16(sg_dma_len(sg)); 983 link_tbl_ptr->j_extent = 0; 984 link_tbl_ptr++; 985 cryptlen -= sg_dma_len(sg); 986 sg = scatterwalk_sg_next(sg); 987 } 988 989 /* adjust (decrease) last one (or two) entry's len to cryptlen */ 990 link_tbl_ptr--; 991 while (be16_to_cpu(link_tbl_ptr->len) <= (-cryptlen)) { 992 /* Empty this entry, and move to previous one */ 993 cryptlen += be16_to_cpu(link_tbl_ptr->len); 994 link_tbl_ptr->len = 0; 995 sg_count--; 996 link_tbl_ptr--; 997 } 998 link_tbl_ptr->len = cpu_to_be16(be16_to_cpu(link_tbl_ptr->len) 999 + cryptlen); 1000 1001 /* tag end of link table */ 1002 link_tbl_ptr->j_extent = DESC_PTR_LNKTBL_RETURN; 1003 1004 return sg_count; 1005 } 1006 1007 /* 1008 * fill in and submit ipsec_esp descriptor 1009 */ 1010 static int ipsec_esp(struct talitos_edesc *edesc, struct aead_request *areq, 1011 u8 *giv, u64 seq, 1012 void (*callback) (struct device *dev, 1013 struct talitos_desc *desc, 1014 void *context, int error)) 1015 { 1016 struct crypto_aead *aead = crypto_aead_reqtfm(areq); 1017 struct talitos_ctx *ctx = crypto_aead_ctx(aead); 1018 struct device *dev = ctx->dev; 1019 struct talitos_desc *desc = &edesc->desc; 1020 unsigned int cryptlen = areq->cryptlen; 1021 unsigned int authsize = ctx->authsize; 1022 unsigned int ivsize = crypto_aead_ivsize(aead); 1023 int sg_count, ret; 1024 int sg_link_tbl_len; 1025 1026 /* hmac key */ 1027 map_single_talitos_ptr(dev, &desc->ptr[0], ctx->authkeylen, &ctx->key, 1028 0, DMA_TO_DEVICE); 1029 /* hmac data */ 1030 map_single_talitos_ptr(dev, &desc->ptr[1], areq->assoclen + ivsize, 1031 sg_virt(areq->assoc), 0, DMA_TO_DEVICE); 1032 /* cipher iv */ 1033 map_single_talitos_ptr(dev, &desc->ptr[2], ivsize, giv ?: areq->iv, 0, 1034 DMA_TO_DEVICE); 1035 1036 /* cipher key */ 1037 map_single_talitos_ptr(dev, &desc->ptr[3], ctx->enckeylen, 1038 (char *)&ctx->key + ctx->authkeylen, 0, 1039 DMA_TO_DEVICE); 1040 1041 /* 1042 * cipher in 1043 * map and adjust cipher len to aead request cryptlen. 1044 * extent is bytes of HMAC postpended to ciphertext, 1045 * typically 12 for ipsec 1046 */ 1047 desc->ptr[4].len = cpu_to_be16(cryptlen); 1048 desc->ptr[4].j_extent = authsize; 1049 1050 sg_count = talitos_map_sg(dev, areq->src, edesc->src_nents ? : 1, 1051 (areq->src == areq->dst) ? DMA_BIDIRECTIONAL 1052 : DMA_TO_DEVICE, 1053 edesc->src_is_chained); 1054 1055 if (sg_count == 1) { 1056 to_talitos_ptr(&desc->ptr[4], sg_dma_address(areq->src)); 1057 } else { 1058 sg_link_tbl_len = cryptlen; 1059 1060 if (edesc->desc.hdr & DESC_HDR_MODE1_MDEU_CICV) 1061 sg_link_tbl_len = cryptlen + authsize; 1062 1063 sg_count = sg_to_link_tbl(areq->src, sg_count, sg_link_tbl_len, 1064 &edesc->link_tbl[0]); 1065 if (sg_count > 1) { 1066 desc->ptr[4].j_extent |= DESC_PTR_LNKTBL_JUMP; 1067 to_talitos_ptr(&desc->ptr[4], edesc->dma_link_tbl); 1068 dma_sync_single_for_device(dev, edesc->dma_link_tbl, 1069 edesc->dma_len, 1070 DMA_BIDIRECTIONAL); 1071 } else { 1072 /* Only one segment now, so no link tbl needed */ 1073 to_talitos_ptr(&desc->ptr[4], 1074 sg_dma_address(areq->src)); 1075 } 1076 } 1077 1078 /* cipher out */ 1079 desc->ptr[5].len = cpu_to_be16(cryptlen); 1080 desc->ptr[5].j_extent = authsize; 1081 1082 if (areq->src != areq->dst) 1083 sg_count = talitos_map_sg(dev, areq->dst, 1084 edesc->dst_nents ? : 1, 1085 DMA_FROM_DEVICE, 1086 edesc->dst_is_chained); 1087 1088 if (sg_count == 1) { 1089 to_talitos_ptr(&desc->ptr[5], sg_dma_address(areq->dst)); 1090 } else { 1091 struct talitos_ptr *link_tbl_ptr = 1092 &edesc->link_tbl[edesc->src_nents + 1]; 1093 1094 to_talitos_ptr(&desc->ptr[5], edesc->dma_link_tbl + 1095 (edesc->src_nents + 1) * 1096 sizeof(struct talitos_ptr)); 1097 sg_count = sg_to_link_tbl(areq->dst, sg_count, cryptlen, 1098 link_tbl_ptr); 1099 1100 /* Add an entry to the link table for ICV data */ 1101 link_tbl_ptr += sg_count - 1; 1102 link_tbl_ptr->j_extent = 0; 1103 sg_count++; 1104 link_tbl_ptr++; 1105 link_tbl_ptr->j_extent = DESC_PTR_LNKTBL_RETURN; 1106 link_tbl_ptr->len = cpu_to_be16(authsize); 1107 1108 /* icv data follows link tables */ 1109 to_talitos_ptr(link_tbl_ptr, edesc->dma_link_tbl + 1110 (edesc->src_nents + edesc->dst_nents + 2) * 1111 sizeof(struct talitos_ptr)); 1112 desc->ptr[5].j_extent |= DESC_PTR_LNKTBL_JUMP; 1113 dma_sync_single_for_device(ctx->dev, edesc->dma_link_tbl, 1114 edesc->dma_len, DMA_BIDIRECTIONAL); 1115 } 1116 1117 /* iv out */ 1118 map_single_talitos_ptr(dev, &desc->ptr[6], ivsize, ctx->iv, 0, 1119 DMA_FROM_DEVICE); 1120 1121 ret = talitos_submit(dev, desc, callback, areq); 1122 if (ret != -EINPROGRESS) { 1123 ipsec_esp_unmap(dev, edesc, areq); 1124 kfree(edesc); 1125 } 1126 return ret; 1127 } 1128 1129 /* 1130 * derive number of elements in scatterlist 1131 */ 1132 static int sg_count(struct scatterlist *sg_list, int nbytes, int *chained) 1133 { 1134 struct scatterlist *sg = sg_list; 1135 int sg_nents = 0; 1136 1137 *chained = 0; 1138 while (nbytes > 0) { 1139 sg_nents++; 1140 nbytes -= sg->length; 1141 if (!sg_is_last(sg) && (sg + 1)->length == 0) 1142 *chained = 1; 1143 sg = scatterwalk_sg_next(sg); 1144 } 1145 1146 return sg_nents; 1147 } 1148 1149 /** 1150 * sg_copy_end_to_buffer - Copy end data from SG list to a linear buffer 1151 * @sgl: The SG list 1152 * @nents: Number of SG entries 1153 * @buf: Where to copy to 1154 * @buflen: The number of bytes to copy 1155 * @skip: The number of bytes to skip before copying. 1156 * Note: skip + buflen should equal SG total size. 1157 * 1158 * Returns the number of copied bytes. 1159 * 1160 **/ 1161 static size_t sg_copy_end_to_buffer(struct scatterlist *sgl, unsigned int nents, 1162 void *buf, size_t buflen, unsigned int skip) 1163 { 1164 unsigned int offset = 0; 1165 unsigned int boffset = 0; 1166 struct sg_mapping_iter miter; 1167 unsigned long flags; 1168 unsigned int sg_flags = SG_MITER_ATOMIC; 1169 size_t total_buffer = buflen + skip; 1170 1171 sg_flags |= SG_MITER_FROM_SG; 1172 1173 sg_miter_start(&miter, sgl, nents, sg_flags); 1174 1175 local_irq_save(flags); 1176 1177 while (sg_miter_next(&miter) && offset < total_buffer) { 1178 unsigned int len; 1179 unsigned int ignore; 1180 1181 if ((offset + miter.length) > skip) { 1182 if (offset < skip) { 1183 /* Copy part of this segment */ 1184 ignore = skip - offset; 1185 len = miter.length - ignore; 1186 if (boffset + len > buflen) 1187 len = buflen - boffset; 1188 memcpy(buf + boffset, miter.addr + ignore, len); 1189 } else { 1190 /* Copy all of this segment (up to buflen) */ 1191 len = miter.length; 1192 if (boffset + len > buflen) 1193 len = buflen - boffset; 1194 memcpy(buf + boffset, miter.addr, len); 1195 } 1196 boffset += len; 1197 } 1198 offset += miter.length; 1199 } 1200 1201 sg_miter_stop(&miter); 1202 1203 local_irq_restore(flags); 1204 return boffset; 1205 } 1206 1207 /* 1208 * allocate and map the extended descriptor 1209 */ 1210 static struct talitos_edesc *talitos_edesc_alloc(struct device *dev, 1211 struct scatterlist *src, 1212 struct scatterlist *dst, 1213 int hash_result, 1214 unsigned int cryptlen, 1215 unsigned int authsize, 1216 int icv_stashing, 1217 u32 cryptoflags) 1218 { 1219 struct talitos_edesc *edesc; 1220 int src_nents, dst_nents, alloc_len, dma_len; 1221 int src_chained, dst_chained = 0; 1222 gfp_t flags = cryptoflags & CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL : 1223 GFP_ATOMIC; 1224 1225 if (cryptlen + authsize > TALITOS_MAX_DATA_LEN) { 1226 dev_err(dev, "length exceeds h/w max limit\n"); 1227 return ERR_PTR(-EINVAL); 1228 } 1229 1230 src_nents = sg_count(src, cryptlen + authsize, &src_chained); 1231 src_nents = (src_nents == 1) ? 0 : src_nents; 1232 1233 if (hash_result) { 1234 dst_nents = 0; 1235 } else { 1236 if (dst == src) { 1237 dst_nents = src_nents; 1238 } else { 1239 dst_nents = sg_count(dst, cryptlen + authsize, 1240 &dst_chained); 1241 dst_nents = (dst_nents == 1) ? 0 : dst_nents; 1242 } 1243 } 1244 1245 /* 1246 * allocate space for base edesc plus the link tables, 1247 * allowing for two separate entries for ICV and generated ICV (+ 2), 1248 * and the ICV data itself 1249 */ 1250 alloc_len = sizeof(struct talitos_edesc); 1251 if (src_nents || dst_nents) { 1252 dma_len = (src_nents + dst_nents + 2) * 1253 sizeof(struct talitos_ptr) + authsize; 1254 alloc_len += dma_len; 1255 } else { 1256 dma_len = 0; 1257 alloc_len += icv_stashing ? authsize : 0; 1258 } 1259 1260 edesc = kmalloc(alloc_len, GFP_DMA | flags); 1261 if (!edesc) { 1262 dev_err(dev, "could not allocate edescriptor\n"); 1263 return ERR_PTR(-ENOMEM); 1264 } 1265 1266 edesc->src_nents = src_nents; 1267 edesc->dst_nents = dst_nents; 1268 edesc->src_is_chained = src_chained; 1269 edesc->dst_is_chained = dst_chained; 1270 edesc->dma_len = dma_len; 1271 if (dma_len) 1272 edesc->dma_link_tbl = dma_map_single(dev, &edesc->link_tbl[0], 1273 edesc->dma_len, 1274 DMA_BIDIRECTIONAL); 1275 1276 return edesc; 1277 } 1278 1279 static struct talitos_edesc *aead_edesc_alloc(struct aead_request *areq, 1280 int icv_stashing) 1281 { 1282 struct crypto_aead *authenc = crypto_aead_reqtfm(areq); 1283 struct talitos_ctx *ctx = crypto_aead_ctx(authenc); 1284 1285 return talitos_edesc_alloc(ctx->dev, areq->src, areq->dst, 0, 1286 areq->cryptlen, ctx->authsize, icv_stashing, 1287 areq->base.flags); 1288 } 1289 1290 static int aead_encrypt(struct aead_request *req) 1291 { 1292 struct crypto_aead *authenc = crypto_aead_reqtfm(req); 1293 struct talitos_ctx *ctx = crypto_aead_ctx(authenc); 1294 struct talitos_edesc *edesc; 1295 1296 /* allocate extended descriptor */ 1297 edesc = aead_edesc_alloc(req, 0); 1298 if (IS_ERR(edesc)) 1299 return PTR_ERR(edesc); 1300 1301 /* set encrypt */ 1302 edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT; 1303 1304 return ipsec_esp(edesc, req, NULL, 0, ipsec_esp_encrypt_done); 1305 } 1306 1307 static int aead_decrypt(struct aead_request *req) 1308 { 1309 struct crypto_aead *authenc = crypto_aead_reqtfm(req); 1310 struct talitos_ctx *ctx = crypto_aead_ctx(authenc); 1311 unsigned int authsize = ctx->authsize; 1312 struct talitos_private *priv = dev_get_drvdata(ctx->dev); 1313 struct talitos_edesc *edesc; 1314 struct scatterlist *sg; 1315 void *icvdata; 1316 1317 req->cryptlen -= authsize; 1318 1319 /* allocate extended descriptor */ 1320 edesc = aead_edesc_alloc(req, 1); 1321 if (IS_ERR(edesc)) 1322 return PTR_ERR(edesc); 1323 1324 if ((priv->features & TALITOS_FTR_HW_AUTH_CHECK) && 1325 ((!edesc->src_nents && !edesc->dst_nents) || 1326 priv->features & TALITOS_FTR_SRC_LINK_TBL_LEN_INCLUDES_EXTENT)) { 1327 1328 /* decrypt and check the ICV */ 1329 edesc->desc.hdr = ctx->desc_hdr_template | 1330 DESC_HDR_DIR_INBOUND | 1331 DESC_HDR_MODE1_MDEU_CICV; 1332 1333 /* reset integrity check result bits */ 1334 edesc->desc.hdr_lo = 0; 1335 1336 return ipsec_esp(edesc, req, NULL, 0, 1337 ipsec_esp_decrypt_hwauth_done); 1338 1339 } 1340 1341 /* Have to check the ICV with software */ 1342 edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_DIR_INBOUND; 1343 1344 /* stash incoming ICV for later cmp with ICV generated by the h/w */ 1345 if (edesc->dma_len) 1346 icvdata = &edesc->link_tbl[edesc->src_nents + 1347 edesc->dst_nents + 2]; 1348 else 1349 icvdata = &edesc->link_tbl[0]; 1350 1351 sg = sg_last(req->src, edesc->src_nents ? : 1); 1352 1353 memcpy(icvdata, (char *)sg_virt(sg) + sg->length - ctx->authsize, 1354 ctx->authsize); 1355 1356 return ipsec_esp(edesc, req, NULL, 0, ipsec_esp_decrypt_swauth_done); 1357 } 1358 1359 static int aead_givencrypt(struct aead_givcrypt_request *req) 1360 { 1361 struct aead_request *areq = &req->areq; 1362 struct crypto_aead *authenc = crypto_aead_reqtfm(areq); 1363 struct talitos_ctx *ctx = crypto_aead_ctx(authenc); 1364 struct talitos_edesc *edesc; 1365 1366 /* allocate extended descriptor */ 1367 edesc = aead_edesc_alloc(areq, 0); 1368 if (IS_ERR(edesc)) 1369 return PTR_ERR(edesc); 1370 1371 /* set encrypt */ 1372 edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT; 1373 1374 memcpy(req->giv, ctx->iv, crypto_aead_ivsize(authenc)); 1375 /* avoid consecutive packets going out with same IV */ 1376 *(__be64 *)req->giv ^= cpu_to_be64(req->seq); 1377 1378 return ipsec_esp(edesc, areq, req->giv, req->seq, 1379 ipsec_esp_encrypt_done); 1380 } 1381 1382 static int ablkcipher_setkey(struct crypto_ablkcipher *cipher, 1383 const u8 *key, unsigned int keylen) 1384 { 1385 struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher); 1386 struct ablkcipher_alg *alg = crypto_ablkcipher_alg(cipher); 1387 1388 if (keylen > TALITOS_MAX_KEY_SIZE) 1389 goto badkey; 1390 1391 if (keylen < alg->min_keysize || keylen > alg->max_keysize) 1392 goto badkey; 1393 1394 memcpy(&ctx->key, key, keylen); 1395 ctx->keylen = keylen; 1396 1397 return 0; 1398 1399 badkey: 1400 crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN); 1401 return -EINVAL; 1402 } 1403 1404 static void common_nonsnoop_unmap(struct device *dev, 1405 struct talitos_edesc *edesc, 1406 struct ablkcipher_request *areq) 1407 { 1408 unmap_single_talitos_ptr(dev, &edesc->desc.ptr[5], DMA_FROM_DEVICE); 1409 unmap_single_talitos_ptr(dev, &edesc->desc.ptr[2], DMA_TO_DEVICE); 1410 unmap_single_talitos_ptr(dev, &edesc->desc.ptr[1], DMA_TO_DEVICE); 1411 1412 talitos_sg_unmap(dev, edesc, areq->src, areq->dst); 1413 1414 if (edesc->dma_len) 1415 dma_unmap_single(dev, edesc->dma_link_tbl, edesc->dma_len, 1416 DMA_BIDIRECTIONAL); 1417 } 1418 1419 static void ablkcipher_done(struct device *dev, 1420 struct talitos_desc *desc, void *context, 1421 int err) 1422 { 1423 struct ablkcipher_request *areq = context; 1424 struct talitos_edesc *edesc; 1425 1426 edesc = container_of(desc, struct talitos_edesc, desc); 1427 1428 common_nonsnoop_unmap(dev, edesc, areq); 1429 1430 kfree(edesc); 1431 1432 areq->base.complete(&areq->base, err); 1433 } 1434 1435 static int common_nonsnoop(struct talitos_edesc *edesc, 1436 struct ablkcipher_request *areq, 1437 u8 *giv, 1438 void (*callback) (struct device *dev, 1439 struct talitos_desc *desc, 1440 void *context, int error)) 1441 { 1442 struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq); 1443 struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher); 1444 struct device *dev = ctx->dev; 1445 struct talitos_desc *desc = &edesc->desc; 1446 unsigned int cryptlen = areq->nbytes; 1447 unsigned int ivsize; 1448 int sg_count, ret; 1449 1450 /* first DWORD empty */ 1451 desc->ptr[0].len = 0; 1452 to_talitos_ptr(&desc->ptr[0], 0); 1453 desc->ptr[0].j_extent = 0; 1454 1455 /* cipher iv */ 1456 ivsize = crypto_ablkcipher_ivsize(cipher); 1457 map_single_talitos_ptr(dev, &desc->ptr[1], ivsize, giv ?: areq->info, 0, 1458 DMA_TO_DEVICE); 1459 1460 /* cipher key */ 1461 map_single_talitos_ptr(dev, &desc->ptr[2], ctx->keylen, 1462 (char *)&ctx->key, 0, DMA_TO_DEVICE); 1463 1464 /* 1465 * cipher in 1466 */ 1467 desc->ptr[3].len = cpu_to_be16(cryptlen); 1468 desc->ptr[3].j_extent = 0; 1469 1470 sg_count = talitos_map_sg(dev, areq->src, edesc->src_nents ? : 1, 1471 (areq->src == areq->dst) ? DMA_BIDIRECTIONAL 1472 : DMA_TO_DEVICE, 1473 edesc->src_is_chained); 1474 1475 if (sg_count == 1) { 1476 to_talitos_ptr(&desc->ptr[3], sg_dma_address(areq->src)); 1477 } else { 1478 sg_count = sg_to_link_tbl(areq->src, sg_count, cryptlen, 1479 &edesc->link_tbl[0]); 1480 if (sg_count > 1) { 1481 to_talitos_ptr(&desc->ptr[3], edesc->dma_link_tbl); 1482 desc->ptr[3].j_extent |= DESC_PTR_LNKTBL_JUMP; 1483 dma_sync_single_for_device(dev, edesc->dma_link_tbl, 1484 edesc->dma_len, 1485 DMA_BIDIRECTIONAL); 1486 } else { 1487 /* Only one segment now, so no link tbl needed */ 1488 to_talitos_ptr(&desc->ptr[3], 1489 sg_dma_address(areq->src)); 1490 } 1491 } 1492 1493 /* cipher out */ 1494 desc->ptr[4].len = cpu_to_be16(cryptlen); 1495 desc->ptr[4].j_extent = 0; 1496 1497 if (areq->src != areq->dst) 1498 sg_count = talitos_map_sg(dev, areq->dst, 1499 edesc->dst_nents ? : 1, 1500 DMA_FROM_DEVICE, 1501 edesc->dst_is_chained); 1502 1503 if (sg_count == 1) { 1504 to_talitos_ptr(&desc->ptr[4], sg_dma_address(areq->dst)); 1505 } else { 1506 struct talitos_ptr *link_tbl_ptr = 1507 &edesc->link_tbl[edesc->src_nents + 1]; 1508 1509 to_talitos_ptr(&desc->ptr[4], edesc->dma_link_tbl + 1510 (edesc->src_nents + 1) * 1511 sizeof(struct talitos_ptr)); 1512 desc->ptr[4].j_extent |= DESC_PTR_LNKTBL_JUMP; 1513 sg_count = sg_to_link_tbl(areq->dst, sg_count, cryptlen, 1514 link_tbl_ptr); 1515 dma_sync_single_for_device(ctx->dev, edesc->dma_link_tbl, 1516 edesc->dma_len, DMA_BIDIRECTIONAL); 1517 } 1518 1519 /* iv out */ 1520 map_single_talitos_ptr(dev, &desc->ptr[5], ivsize, ctx->iv, 0, 1521 DMA_FROM_DEVICE); 1522 1523 /* last DWORD empty */ 1524 desc->ptr[6].len = 0; 1525 to_talitos_ptr(&desc->ptr[6], 0); 1526 desc->ptr[6].j_extent = 0; 1527 1528 ret = talitos_submit(dev, desc, callback, areq); 1529 if (ret != -EINPROGRESS) { 1530 common_nonsnoop_unmap(dev, edesc, areq); 1531 kfree(edesc); 1532 } 1533 return ret; 1534 } 1535 1536 static struct talitos_edesc *ablkcipher_edesc_alloc(struct ablkcipher_request * 1537 areq) 1538 { 1539 struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq); 1540 struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher); 1541 1542 return talitos_edesc_alloc(ctx->dev, areq->src, areq->dst, 0, 1543 areq->nbytes, 0, 0, areq->base.flags); 1544 } 1545 1546 static int ablkcipher_encrypt(struct ablkcipher_request *areq) 1547 { 1548 struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq); 1549 struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher); 1550 struct talitos_edesc *edesc; 1551 1552 /* allocate extended descriptor */ 1553 edesc = ablkcipher_edesc_alloc(areq); 1554 if (IS_ERR(edesc)) 1555 return PTR_ERR(edesc); 1556 1557 /* set encrypt */ 1558 edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT; 1559 1560 return common_nonsnoop(edesc, areq, NULL, ablkcipher_done); 1561 } 1562 1563 static int ablkcipher_decrypt(struct ablkcipher_request *areq) 1564 { 1565 struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq); 1566 struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher); 1567 struct talitos_edesc *edesc; 1568 1569 /* allocate extended descriptor */ 1570 edesc = ablkcipher_edesc_alloc(areq); 1571 if (IS_ERR(edesc)) 1572 return PTR_ERR(edesc); 1573 1574 edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_DIR_INBOUND; 1575 1576 return common_nonsnoop(edesc, areq, NULL, ablkcipher_done); 1577 } 1578 1579 static void common_nonsnoop_hash_unmap(struct device *dev, 1580 struct talitos_edesc *edesc, 1581 struct ahash_request *areq) 1582 { 1583 struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq); 1584 1585 unmap_single_talitos_ptr(dev, &edesc->desc.ptr[5], DMA_FROM_DEVICE); 1586 1587 /* When using hashctx-in, must unmap it. */ 1588 if (edesc->desc.ptr[1].len) 1589 unmap_single_talitos_ptr(dev, &edesc->desc.ptr[1], 1590 DMA_TO_DEVICE); 1591 1592 if (edesc->desc.ptr[2].len) 1593 unmap_single_talitos_ptr(dev, &edesc->desc.ptr[2], 1594 DMA_TO_DEVICE); 1595 1596 talitos_sg_unmap(dev, edesc, req_ctx->psrc, NULL); 1597 1598 if (edesc->dma_len) 1599 dma_unmap_single(dev, edesc->dma_link_tbl, edesc->dma_len, 1600 DMA_BIDIRECTIONAL); 1601 1602 } 1603 1604 static void ahash_done(struct device *dev, 1605 struct talitos_desc *desc, void *context, 1606 int err) 1607 { 1608 struct ahash_request *areq = context; 1609 struct talitos_edesc *edesc = 1610 container_of(desc, struct talitos_edesc, desc); 1611 struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq); 1612 1613 if (!req_ctx->last && req_ctx->to_hash_later) { 1614 /* Position any partial block for next update/final/finup */ 1615 memcpy(req_ctx->buf, req_ctx->bufnext, req_ctx->to_hash_later); 1616 req_ctx->nbuf = req_ctx->to_hash_later; 1617 } 1618 common_nonsnoop_hash_unmap(dev, edesc, areq); 1619 1620 kfree(edesc); 1621 1622 areq->base.complete(&areq->base, err); 1623 } 1624 1625 static int common_nonsnoop_hash(struct talitos_edesc *edesc, 1626 struct ahash_request *areq, unsigned int length, 1627 void (*callback) (struct device *dev, 1628 struct talitos_desc *desc, 1629 void *context, int error)) 1630 { 1631 struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq); 1632 struct talitos_ctx *ctx = crypto_ahash_ctx(tfm); 1633 struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq); 1634 struct device *dev = ctx->dev; 1635 struct talitos_desc *desc = &edesc->desc; 1636 int sg_count, ret; 1637 1638 /* first DWORD empty */ 1639 desc->ptr[0] = zero_entry; 1640 1641 /* hash context in */ 1642 if (!req_ctx->first || req_ctx->swinit) { 1643 map_single_talitos_ptr(dev, &desc->ptr[1], 1644 req_ctx->hw_context_size, 1645 (char *)req_ctx->hw_context, 0, 1646 DMA_TO_DEVICE); 1647 req_ctx->swinit = 0; 1648 } else { 1649 desc->ptr[1] = zero_entry; 1650 /* Indicate next op is not the first. */ 1651 req_ctx->first = 0; 1652 } 1653 1654 /* HMAC key */ 1655 if (ctx->keylen) 1656 map_single_talitos_ptr(dev, &desc->ptr[2], ctx->keylen, 1657 (char *)&ctx->key, 0, DMA_TO_DEVICE); 1658 else 1659 desc->ptr[2] = zero_entry; 1660 1661 /* 1662 * data in 1663 */ 1664 desc->ptr[3].len = cpu_to_be16(length); 1665 desc->ptr[3].j_extent = 0; 1666 1667 sg_count = talitos_map_sg(dev, req_ctx->psrc, 1668 edesc->src_nents ? : 1, 1669 DMA_TO_DEVICE, 1670 edesc->src_is_chained); 1671 1672 if (sg_count == 1) { 1673 to_talitos_ptr(&desc->ptr[3], sg_dma_address(req_ctx->psrc)); 1674 } else { 1675 sg_count = sg_to_link_tbl(req_ctx->psrc, sg_count, length, 1676 &edesc->link_tbl[0]); 1677 if (sg_count > 1) { 1678 desc->ptr[3].j_extent |= DESC_PTR_LNKTBL_JUMP; 1679 to_talitos_ptr(&desc->ptr[3], edesc->dma_link_tbl); 1680 dma_sync_single_for_device(ctx->dev, 1681 edesc->dma_link_tbl, 1682 edesc->dma_len, 1683 DMA_BIDIRECTIONAL); 1684 } else { 1685 /* Only one segment now, so no link tbl needed */ 1686 to_talitos_ptr(&desc->ptr[3], 1687 sg_dma_address(req_ctx->psrc)); 1688 } 1689 } 1690 1691 /* fifth DWORD empty */ 1692 desc->ptr[4] = zero_entry; 1693 1694 /* hash/HMAC out -or- hash context out */ 1695 if (req_ctx->last) 1696 map_single_talitos_ptr(dev, &desc->ptr[5], 1697 crypto_ahash_digestsize(tfm), 1698 areq->result, 0, DMA_FROM_DEVICE); 1699 else 1700 map_single_talitos_ptr(dev, &desc->ptr[5], 1701 req_ctx->hw_context_size, 1702 req_ctx->hw_context, 0, DMA_FROM_DEVICE); 1703 1704 /* last DWORD empty */ 1705 desc->ptr[6] = zero_entry; 1706 1707 ret = talitos_submit(dev, desc, callback, areq); 1708 if (ret != -EINPROGRESS) { 1709 common_nonsnoop_hash_unmap(dev, edesc, areq); 1710 kfree(edesc); 1711 } 1712 return ret; 1713 } 1714 1715 static struct talitos_edesc *ahash_edesc_alloc(struct ahash_request *areq, 1716 unsigned int nbytes) 1717 { 1718 struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq); 1719 struct talitos_ctx *ctx = crypto_ahash_ctx(tfm); 1720 struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq); 1721 1722 return talitos_edesc_alloc(ctx->dev, req_ctx->psrc, NULL, 1, 1723 nbytes, 0, 0, areq->base.flags); 1724 } 1725 1726 static int ahash_init(struct ahash_request *areq) 1727 { 1728 struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq); 1729 struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq); 1730 1731 /* Initialize the context */ 1732 req_ctx->nbuf = 0; 1733 req_ctx->first = 1; /* first indicates h/w must init its context */ 1734 req_ctx->swinit = 0; /* assume h/w init of context */ 1735 req_ctx->hw_context_size = 1736 (crypto_ahash_digestsize(tfm) <= SHA256_DIGEST_SIZE) 1737 ? TALITOS_MDEU_CONTEXT_SIZE_MD5_SHA1_SHA256 1738 : TALITOS_MDEU_CONTEXT_SIZE_SHA384_SHA512; 1739 1740 return 0; 1741 } 1742 1743 /* 1744 * on h/w without explicit sha224 support, we initialize h/w context 1745 * manually with sha224 constants, and tell it to run sha256. 1746 */ 1747 static int ahash_init_sha224_swinit(struct ahash_request *areq) 1748 { 1749 struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq); 1750 1751 ahash_init(areq); 1752 req_ctx->swinit = 1;/* prevent h/w initting context with sha256 values*/ 1753 1754 req_ctx->hw_context[0] = cpu_to_be32(SHA224_H0); 1755 req_ctx->hw_context[1] = cpu_to_be32(SHA224_H1); 1756 req_ctx->hw_context[2] = cpu_to_be32(SHA224_H2); 1757 req_ctx->hw_context[3] = cpu_to_be32(SHA224_H3); 1758 req_ctx->hw_context[4] = cpu_to_be32(SHA224_H4); 1759 req_ctx->hw_context[5] = cpu_to_be32(SHA224_H5); 1760 req_ctx->hw_context[6] = cpu_to_be32(SHA224_H6); 1761 req_ctx->hw_context[7] = cpu_to_be32(SHA224_H7); 1762 1763 /* init 64-bit count */ 1764 req_ctx->hw_context[8] = 0; 1765 req_ctx->hw_context[9] = 0; 1766 1767 return 0; 1768 } 1769 1770 static int ahash_process_req(struct ahash_request *areq, unsigned int nbytes) 1771 { 1772 struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq); 1773 struct talitos_ctx *ctx = crypto_ahash_ctx(tfm); 1774 struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq); 1775 struct talitos_edesc *edesc; 1776 unsigned int blocksize = 1777 crypto_tfm_alg_blocksize(crypto_ahash_tfm(tfm)); 1778 unsigned int nbytes_to_hash; 1779 unsigned int to_hash_later; 1780 unsigned int nsg; 1781 int chained; 1782 1783 if (!req_ctx->last && (nbytes + req_ctx->nbuf <= blocksize)) { 1784 /* Buffer up to one whole block */ 1785 sg_copy_to_buffer(areq->src, 1786 sg_count(areq->src, nbytes, &chained), 1787 req_ctx->buf + req_ctx->nbuf, nbytes); 1788 req_ctx->nbuf += nbytes; 1789 return 0; 1790 } 1791 1792 /* At least (blocksize + 1) bytes are available to hash */ 1793 nbytes_to_hash = nbytes + req_ctx->nbuf; 1794 to_hash_later = nbytes_to_hash & (blocksize - 1); 1795 1796 if (req_ctx->last) 1797 to_hash_later = 0; 1798 else if (to_hash_later) 1799 /* There is a partial block. Hash the full block(s) now */ 1800 nbytes_to_hash -= to_hash_later; 1801 else { 1802 /* Keep one block buffered */ 1803 nbytes_to_hash -= blocksize; 1804 to_hash_later = blocksize; 1805 } 1806 1807 /* Chain in any previously buffered data */ 1808 if (req_ctx->nbuf) { 1809 nsg = (req_ctx->nbuf < nbytes_to_hash) ? 2 : 1; 1810 sg_init_table(req_ctx->bufsl, nsg); 1811 sg_set_buf(req_ctx->bufsl, req_ctx->buf, req_ctx->nbuf); 1812 if (nsg > 1) 1813 scatterwalk_sg_chain(req_ctx->bufsl, 2, areq->src); 1814 req_ctx->psrc = req_ctx->bufsl; 1815 } else 1816 req_ctx->psrc = areq->src; 1817 1818 if (to_hash_later) { 1819 int nents = sg_count(areq->src, nbytes, &chained); 1820 sg_copy_end_to_buffer(areq->src, nents, 1821 req_ctx->bufnext, 1822 to_hash_later, 1823 nbytes - to_hash_later); 1824 } 1825 req_ctx->to_hash_later = to_hash_later; 1826 1827 /* Allocate extended descriptor */ 1828 edesc = ahash_edesc_alloc(areq, nbytes_to_hash); 1829 if (IS_ERR(edesc)) 1830 return PTR_ERR(edesc); 1831 1832 edesc->desc.hdr = ctx->desc_hdr_template; 1833 1834 /* On last one, request SEC to pad; otherwise continue */ 1835 if (req_ctx->last) 1836 edesc->desc.hdr |= DESC_HDR_MODE0_MDEU_PAD; 1837 else 1838 edesc->desc.hdr |= DESC_HDR_MODE0_MDEU_CONT; 1839 1840 /* request SEC to INIT hash. */ 1841 if (req_ctx->first && !req_ctx->swinit) 1842 edesc->desc.hdr |= DESC_HDR_MODE0_MDEU_INIT; 1843 1844 /* When the tfm context has a keylen, it's an HMAC. 1845 * A first or last (ie. not middle) descriptor must request HMAC. 1846 */ 1847 if (ctx->keylen && (req_ctx->first || req_ctx->last)) 1848 edesc->desc.hdr |= DESC_HDR_MODE0_MDEU_HMAC; 1849 1850 return common_nonsnoop_hash(edesc, areq, nbytes_to_hash, 1851 ahash_done); 1852 } 1853 1854 static int ahash_update(struct ahash_request *areq) 1855 { 1856 struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq); 1857 1858 req_ctx->last = 0; 1859 1860 return ahash_process_req(areq, areq->nbytes); 1861 } 1862 1863 static int ahash_final(struct ahash_request *areq) 1864 { 1865 struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq); 1866 1867 req_ctx->last = 1; 1868 1869 return ahash_process_req(areq, 0); 1870 } 1871 1872 static int ahash_finup(struct ahash_request *areq) 1873 { 1874 struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq); 1875 1876 req_ctx->last = 1; 1877 1878 return ahash_process_req(areq, areq->nbytes); 1879 } 1880 1881 static int ahash_digest(struct ahash_request *areq) 1882 { 1883 struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq); 1884 struct crypto_ahash *ahash = crypto_ahash_reqtfm(areq); 1885 1886 ahash->init(areq); 1887 req_ctx->last = 1; 1888 1889 return ahash_process_req(areq, areq->nbytes); 1890 } 1891 1892 struct talitos_alg_template { 1893 u32 type; 1894 union { 1895 struct crypto_alg crypto; 1896 struct ahash_alg hash; 1897 } alg; 1898 __be32 desc_hdr_template; 1899 }; 1900 1901 static struct talitos_alg_template driver_algs[] = { 1902 /* AEAD algorithms. These use a single-pass ipsec_esp descriptor */ 1903 { .type = CRYPTO_ALG_TYPE_AEAD, 1904 .alg.crypto = { 1905 .cra_name = "authenc(hmac(sha1),cbc(aes))", 1906 .cra_driver_name = "authenc-hmac-sha1-cbc-aes-talitos", 1907 .cra_blocksize = AES_BLOCK_SIZE, 1908 .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC, 1909 .cra_type = &crypto_aead_type, 1910 .cra_aead = { 1911 .setkey = aead_setkey, 1912 .setauthsize = aead_setauthsize, 1913 .encrypt = aead_encrypt, 1914 .decrypt = aead_decrypt, 1915 .givencrypt = aead_givencrypt, 1916 .geniv = "<built-in>", 1917 .ivsize = AES_BLOCK_SIZE, 1918 .maxauthsize = SHA1_DIGEST_SIZE, 1919 } 1920 }, 1921 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP | 1922 DESC_HDR_SEL0_AESU | 1923 DESC_HDR_MODE0_AESU_CBC | 1924 DESC_HDR_SEL1_MDEUA | 1925 DESC_HDR_MODE1_MDEU_INIT | 1926 DESC_HDR_MODE1_MDEU_PAD | 1927 DESC_HDR_MODE1_MDEU_SHA1_HMAC, 1928 }, 1929 { .type = CRYPTO_ALG_TYPE_AEAD, 1930 .alg.crypto = { 1931 .cra_name = "authenc(hmac(sha1),cbc(des3_ede))", 1932 .cra_driver_name = "authenc-hmac-sha1-cbc-3des-talitos", 1933 .cra_blocksize = DES3_EDE_BLOCK_SIZE, 1934 .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC, 1935 .cra_type = &crypto_aead_type, 1936 .cra_aead = { 1937 .setkey = aead_setkey, 1938 .setauthsize = aead_setauthsize, 1939 .encrypt = aead_encrypt, 1940 .decrypt = aead_decrypt, 1941 .givencrypt = aead_givencrypt, 1942 .geniv = "<built-in>", 1943 .ivsize = DES3_EDE_BLOCK_SIZE, 1944 .maxauthsize = SHA1_DIGEST_SIZE, 1945 } 1946 }, 1947 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP | 1948 DESC_HDR_SEL0_DEU | 1949 DESC_HDR_MODE0_DEU_CBC | 1950 DESC_HDR_MODE0_DEU_3DES | 1951 DESC_HDR_SEL1_MDEUA | 1952 DESC_HDR_MODE1_MDEU_INIT | 1953 DESC_HDR_MODE1_MDEU_PAD | 1954 DESC_HDR_MODE1_MDEU_SHA1_HMAC, 1955 }, 1956 { .type = CRYPTO_ALG_TYPE_AEAD, 1957 .alg.crypto = { 1958 .cra_name = "authenc(hmac(sha256),cbc(aes))", 1959 .cra_driver_name = "authenc-hmac-sha256-cbc-aes-talitos", 1960 .cra_blocksize = AES_BLOCK_SIZE, 1961 .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC, 1962 .cra_type = &crypto_aead_type, 1963 .cra_aead = { 1964 .setkey = aead_setkey, 1965 .setauthsize = aead_setauthsize, 1966 .encrypt = aead_encrypt, 1967 .decrypt = aead_decrypt, 1968 .givencrypt = aead_givencrypt, 1969 .geniv = "<built-in>", 1970 .ivsize = AES_BLOCK_SIZE, 1971 .maxauthsize = SHA256_DIGEST_SIZE, 1972 } 1973 }, 1974 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP | 1975 DESC_HDR_SEL0_AESU | 1976 DESC_HDR_MODE0_AESU_CBC | 1977 DESC_HDR_SEL1_MDEUA | 1978 DESC_HDR_MODE1_MDEU_INIT | 1979 DESC_HDR_MODE1_MDEU_PAD | 1980 DESC_HDR_MODE1_MDEU_SHA256_HMAC, 1981 }, 1982 { .type = CRYPTO_ALG_TYPE_AEAD, 1983 .alg.crypto = { 1984 .cra_name = "authenc(hmac(sha256),cbc(des3_ede))", 1985 .cra_driver_name = "authenc-hmac-sha256-cbc-3des-talitos", 1986 .cra_blocksize = DES3_EDE_BLOCK_SIZE, 1987 .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC, 1988 .cra_type = &crypto_aead_type, 1989 .cra_aead = { 1990 .setkey = aead_setkey, 1991 .setauthsize = aead_setauthsize, 1992 .encrypt = aead_encrypt, 1993 .decrypt = aead_decrypt, 1994 .givencrypt = aead_givencrypt, 1995 .geniv = "<built-in>", 1996 .ivsize = DES3_EDE_BLOCK_SIZE, 1997 .maxauthsize = SHA256_DIGEST_SIZE, 1998 } 1999 }, 2000 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP | 2001 DESC_HDR_SEL0_DEU | 2002 DESC_HDR_MODE0_DEU_CBC | 2003 DESC_HDR_MODE0_DEU_3DES | 2004 DESC_HDR_SEL1_MDEUA | 2005 DESC_HDR_MODE1_MDEU_INIT | 2006 DESC_HDR_MODE1_MDEU_PAD | 2007 DESC_HDR_MODE1_MDEU_SHA256_HMAC, 2008 }, 2009 { .type = CRYPTO_ALG_TYPE_AEAD, 2010 .alg.crypto = { 2011 .cra_name = "authenc(hmac(md5),cbc(aes))", 2012 .cra_driver_name = "authenc-hmac-md5-cbc-aes-talitos", 2013 .cra_blocksize = AES_BLOCK_SIZE, 2014 .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC, 2015 .cra_type = &crypto_aead_type, 2016 .cra_aead = { 2017 .setkey = aead_setkey, 2018 .setauthsize = aead_setauthsize, 2019 .encrypt = aead_encrypt, 2020 .decrypt = aead_decrypt, 2021 .givencrypt = aead_givencrypt, 2022 .geniv = "<built-in>", 2023 .ivsize = AES_BLOCK_SIZE, 2024 .maxauthsize = MD5_DIGEST_SIZE, 2025 } 2026 }, 2027 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP | 2028 DESC_HDR_SEL0_AESU | 2029 DESC_HDR_MODE0_AESU_CBC | 2030 DESC_HDR_SEL1_MDEUA | 2031 DESC_HDR_MODE1_MDEU_INIT | 2032 DESC_HDR_MODE1_MDEU_PAD | 2033 DESC_HDR_MODE1_MDEU_MD5_HMAC, 2034 }, 2035 { .type = CRYPTO_ALG_TYPE_AEAD, 2036 .alg.crypto = { 2037 .cra_name = "authenc(hmac(md5),cbc(des3_ede))", 2038 .cra_driver_name = "authenc-hmac-md5-cbc-3des-talitos", 2039 .cra_blocksize = DES3_EDE_BLOCK_SIZE, 2040 .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC, 2041 .cra_type = &crypto_aead_type, 2042 .cra_aead = { 2043 .setkey = aead_setkey, 2044 .setauthsize = aead_setauthsize, 2045 .encrypt = aead_encrypt, 2046 .decrypt = aead_decrypt, 2047 .givencrypt = aead_givencrypt, 2048 .geniv = "<built-in>", 2049 .ivsize = DES3_EDE_BLOCK_SIZE, 2050 .maxauthsize = MD5_DIGEST_SIZE, 2051 } 2052 }, 2053 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP | 2054 DESC_HDR_SEL0_DEU | 2055 DESC_HDR_MODE0_DEU_CBC | 2056 DESC_HDR_MODE0_DEU_3DES | 2057 DESC_HDR_SEL1_MDEUA | 2058 DESC_HDR_MODE1_MDEU_INIT | 2059 DESC_HDR_MODE1_MDEU_PAD | 2060 DESC_HDR_MODE1_MDEU_MD5_HMAC, 2061 }, 2062 /* ABLKCIPHER algorithms. */ 2063 { .type = CRYPTO_ALG_TYPE_ABLKCIPHER, 2064 .alg.crypto = { 2065 .cra_name = "cbc(aes)", 2066 .cra_driver_name = "cbc-aes-talitos", 2067 .cra_blocksize = AES_BLOCK_SIZE, 2068 .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | 2069 CRYPTO_ALG_ASYNC, 2070 .cra_type = &crypto_ablkcipher_type, 2071 .cra_ablkcipher = { 2072 .setkey = ablkcipher_setkey, 2073 .encrypt = ablkcipher_encrypt, 2074 .decrypt = ablkcipher_decrypt, 2075 .geniv = "eseqiv", 2076 .min_keysize = AES_MIN_KEY_SIZE, 2077 .max_keysize = AES_MAX_KEY_SIZE, 2078 .ivsize = AES_BLOCK_SIZE, 2079 } 2080 }, 2081 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU | 2082 DESC_HDR_SEL0_AESU | 2083 DESC_HDR_MODE0_AESU_CBC, 2084 }, 2085 { .type = CRYPTO_ALG_TYPE_ABLKCIPHER, 2086 .alg.crypto = { 2087 .cra_name = "cbc(des3_ede)", 2088 .cra_driver_name = "cbc-3des-talitos", 2089 .cra_blocksize = DES3_EDE_BLOCK_SIZE, 2090 .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | 2091 CRYPTO_ALG_ASYNC, 2092 .cra_type = &crypto_ablkcipher_type, 2093 .cra_ablkcipher = { 2094 .setkey = ablkcipher_setkey, 2095 .encrypt = ablkcipher_encrypt, 2096 .decrypt = ablkcipher_decrypt, 2097 .geniv = "eseqiv", 2098 .min_keysize = DES3_EDE_KEY_SIZE, 2099 .max_keysize = DES3_EDE_KEY_SIZE, 2100 .ivsize = DES3_EDE_BLOCK_SIZE, 2101 } 2102 }, 2103 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU | 2104 DESC_HDR_SEL0_DEU | 2105 DESC_HDR_MODE0_DEU_CBC | 2106 DESC_HDR_MODE0_DEU_3DES, 2107 }, 2108 /* AHASH algorithms. */ 2109 { .type = CRYPTO_ALG_TYPE_AHASH, 2110 .alg.hash = { 2111 .init = ahash_init, 2112 .update = ahash_update, 2113 .final = ahash_final, 2114 .finup = ahash_finup, 2115 .digest = ahash_digest, 2116 .halg.digestsize = MD5_DIGEST_SIZE, 2117 .halg.base = { 2118 .cra_name = "md5", 2119 .cra_driver_name = "md5-talitos", 2120 .cra_blocksize = MD5_BLOCK_SIZE, 2121 .cra_flags = CRYPTO_ALG_TYPE_AHASH | 2122 CRYPTO_ALG_ASYNC, 2123 .cra_type = &crypto_ahash_type 2124 } 2125 }, 2126 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU | 2127 DESC_HDR_SEL0_MDEUA | 2128 DESC_HDR_MODE0_MDEU_MD5, 2129 }, 2130 { .type = CRYPTO_ALG_TYPE_AHASH, 2131 .alg.hash = { 2132 .init = ahash_init, 2133 .update = ahash_update, 2134 .final = ahash_final, 2135 .finup = ahash_finup, 2136 .digest = ahash_digest, 2137 .halg.digestsize = SHA1_DIGEST_SIZE, 2138 .halg.base = { 2139 .cra_name = "sha1", 2140 .cra_driver_name = "sha1-talitos", 2141 .cra_blocksize = SHA1_BLOCK_SIZE, 2142 .cra_flags = CRYPTO_ALG_TYPE_AHASH | 2143 CRYPTO_ALG_ASYNC, 2144 .cra_type = &crypto_ahash_type 2145 } 2146 }, 2147 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU | 2148 DESC_HDR_SEL0_MDEUA | 2149 DESC_HDR_MODE0_MDEU_SHA1, 2150 }, 2151 { .type = CRYPTO_ALG_TYPE_AHASH, 2152 .alg.hash = { 2153 .init = ahash_init, 2154 .update = ahash_update, 2155 .final = ahash_final, 2156 .finup = ahash_finup, 2157 .digest = ahash_digest, 2158 .halg.digestsize = SHA224_DIGEST_SIZE, 2159 .halg.base = { 2160 .cra_name = "sha224", 2161 .cra_driver_name = "sha224-talitos", 2162 .cra_blocksize = SHA224_BLOCK_SIZE, 2163 .cra_flags = CRYPTO_ALG_TYPE_AHASH | 2164 CRYPTO_ALG_ASYNC, 2165 .cra_type = &crypto_ahash_type 2166 } 2167 }, 2168 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU | 2169 DESC_HDR_SEL0_MDEUA | 2170 DESC_HDR_MODE0_MDEU_SHA224, 2171 }, 2172 { .type = CRYPTO_ALG_TYPE_AHASH, 2173 .alg.hash = { 2174 .init = ahash_init, 2175 .update = ahash_update, 2176 .final = ahash_final, 2177 .finup = ahash_finup, 2178 .digest = ahash_digest, 2179 .halg.digestsize = SHA256_DIGEST_SIZE, 2180 .halg.base = { 2181 .cra_name = "sha256", 2182 .cra_driver_name = "sha256-talitos", 2183 .cra_blocksize = SHA256_BLOCK_SIZE, 2184 .cra_flags = CRYPTO_ALG_TYPE_AHASH | 2185 CRYPTO_ALG_ASYNC, 2186 .cra_type = &crypto_ahash_type 2187 } 2188 }, 2189 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU | 2190 DESC_HDR_SEL0_MDEUA | 2191 DESC_HDR_MODE0_MDEU_SHA256, 2192 }, 2193 { .type = CRYPTO_ALG_TYPE_AHASH, 2194 .alg.hash = { 2195 .init = ahash_init, 2196 .update = ahash_update, 2197 .final = ahash_final, 2198 .finup = ahash_finup, 2199 .digest = ahash_digest, 2200 .halg.digestsize = SHA384_DIGEST_SIZE, 2201 .halg.base = { 2202 .cra_name = "sha384", 2203 .cra_driver_name = "sha384-talitos", 2204 .cra_blocksize = SHA384_BLOCK_SIZE, 2205 .cra_flags = CRYPTO_ALG_TYPE_AHASH | 2206 CRYPTO_ALG_ASYNC, 2207 .cra_type = &crypto_ahash_type 2208 } 2209 }, 2210 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU | 2211 DESC_HDR_SEL0_MDEUB | 2212 DESC_HDR_MODE0_MDEUB_SHA384, 2213 }, 2214 { .type = CRYPTO_ALG_TYPE_AHASH, 2215 .alg.hash = { 2216 .init = ahash_init, 2217 .update = ahash_update, 2218 .final = ahash_final, 2219 .finup = ahash_finup, 2220 .digest = ahash_digest, 2221 .halg.digestsize = SHA512_DIGEST_SIZE, 2222 .halg.base = { 2223 .cra_name = "sha512", 2224 .cra_driver_name = "sha512-talitos", 2225 .cra_blocksize = SHA512_BLOCK_SIZE, 2226 .cra_flags = CRYPTO_ALG_TYPE_AHASH | 2227 CRYPTO_ALG_ASYNC, 2228 .cra_type = &crypto_ahash_type 2229 } 2230 }, 2231 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU | 2232 DESC_HDR_SEL0_MDEUB | 2233 DESC_HDR_MODE0_MDEUB_SHA512, 2234 }, 2235 }; 2236 2237 struct talitos_crypto_alg { 2238 struct list_head entry; 2239 struct device *dev; 2240 struct talitos_alg_template algt; 2241 }; 2242 2243 static int talitos_cra_init(struct crypto_tfm *tfm) 2244 { 2245 struct crypto_alg *alg = tfm->__crt_alg; 2246 struct talitos_crypto_alg *talitos_alg; 2247 struct talitos_ctx *ctx = crypto_tfm_ctx(tfm); 2248 2249 if ((alg->cra_flags & CRYPTO_ALG_TYPE_MASK) == CRYPTO_ALG_TYPE_AHASH) 2250 talitos_alg = container_of(__crypto_ahash_alg(alg), 2251 struct talitos_crypto_alg, 2252 algt.alg.hash); 2253 else 2254 talitos_alg = container_of(alg, struct talitos_crypto_alg, 2255 algt.alg.crypto); 2256 2257 /* update context with ptr to dev */ 2258 ctx->dev = talitos_alg->dev; 2259 2260 /* copy descriptor header template value */ 2261 ctx->desc_hdr_template = talitos_alg->algt.desc_hdr_template; 2262 2263 return 0; 2264 } 2265 2266 static int talitos_cra_init_aead(struct crypto_tfm *tfm) 2267 { 2268 struct talitos_ctx *ctx = crypto_tfm_ctx(tfm); 2269 2270 talitos_cra_init(tfm); 2271 2272 /* random first IV */ 2273 get_random_bytes(ctx->iv, TALITOS_MAX_IV_LENGTH); 2274 2275 return 0; 2276 } 2277 2278 static int talitos_cra_init_ahash(struct crypto_tfm *tfm) 2279 { 2280 struct talitos_ctx *ctx = crypto_tfm_ctx(tfm); 2281 2282 talitos_cra_init(tfm); 2283 2284 ctx->keylen = 0; 2285 crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm), 2286 sizeof(struct talitos_ahash_req_ctx)); 2287 2288 return 0; 2289 } 2290 2291 /* 2292 * given the alg's descriptor header template, determine whether descriptor 2293 * type and primary/secondary execution units required match the hw 2294 * capabilities description provided in the device tree node. 2295 */ 2296 static int hw_supports(struct device *dev, __be32 desc_hdr_template) 2297 { 2298 struct talitos_private *priv = dev_get_drvdata(dev); 2299 int ret; 2300 2301 ret = (1 << DESC_TYPE(desc_hdr_template) & priv->desc_types) && 2302 (1 << PRIMARY_EU(desc_hdr_template) & priv->exec_units); 2303 2304 if (SECONDARY_EU(desc_hdr_template)) 2305 ret = ret && (1 << SECONDARY_EU(desc_hdr_template) 2306 & priv->exec_units); 2307 2308 return ret; 2309 } 2310 2311 static int talitos_remove(struct platform_device *ofdev) 2312 { 2313 struct device *dev = &ofdev->dev; 2314 struct talitos_private *priv = dev_get_drvdata(dev); 2315 struct talitos_crypto_alg *t_alg, *n; 2316 int i; 2317 2318 list_for_each_entry_safe(t_alg, n, &priv->alg_list, entry) { 2319 switch (t_alg->algt.type) { 2320 case CRYPTO_ALG_TYPE_ABLKCIPHER: 2321 case CRYPTO_ALG_TYPE_AEAD: 2322 crypto_unregister_alg(&t_alg->algt.alg.crypto); 2323 break; 2324 case CRYPTO_ALG_TYPE_AHASH: 2325 crypto_unregister_ahash(&t_alg->algt.alg.hash); 2326 break; 2327 } 2328 list_del(&t_alg->entry); 2329 kfree(t_alg); 2330 } 2331 2332 if (hw_supports(dev, DESC_HDR_SEL0_RNG)) 2333 talitos_unregister_rng(dev); 2334 2335 for (i = 0; i < priv->num_channels; i++) 2336 if (priv->chan[i].fifo) 2337 kfree(priv->chan[i].fifo); 2338 2339 kfree(priv->chan); 2340 2341 if (priv->irq != NO_IRQ) { 2342 free_irq(priv->irq, dev); 2343 irq_dispose_mapping(priv->irq); 2344 } 2345 2346 tasklet_kill(&priv->done_task); 2347 2348 iounmap(priv->reg); 2349 2350 dev_set_drvdata(dev, NULL); 2351 2352 kfree(priv); 2353 2354 return 0; 2355 } 2356 2357 static struct talitos_crypto_alg *talitos_alg_alloc(struct device *dev, 2358 struct talitos_alg_template 2359 *template) 2360 { 2361 struct talitos_private *priv = dev_get_drvdata(dev); 2362 struct talitos_crypto_alg *t_alg; 2363 struct crypto_alg *alg; 2364 2365 t_alg = kzalloc(sizeof(struct talitos_crypto_alg), GFP_KERNEL); 2366 if (!t_alg) 2367 return ERR_PTR(-ENOMEM); 2368 2369 t_alg->algt = *template; 2370 2371 switch (t_alg->algt.type) { 2372 case CRYPTO_ALG_TYPE_ABLKCIPHER: 2373 alg = &t_alg->algt.alg.crypto; 2374 alg->cra_init = talitos_cra_init; 2375 break; 2376 case CRYPTO_ALG_TYPE_AEAD: 2377 alg = &t_alg->algt.alg.crypto; 2378 alg->cra_init = talitos_cra_init_aead; 2379 break; 2380 case CRYPTO_ALG_TYPE_AHASH: 2381 alg = &t_alg->algt.alg.hash.halg.base; 2382 alg->cra_init = talitos_cra_init_ahash; 2383 if (!(priv->features & TALITOS_FTR_SHA224_HWINIT) && 2384 !strcmp(alg->cra_name, "sha224")) { 2385 t_alg->algt.alg.hash.init = ahash_init_sha224_swinit; 2386 t_alg->algt.desc_hdr_template = 2387 DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU | 2388 DESC_HDR_SEL0_MDEUA | 2389 DESC_HDR_MODE0_MDEU_SHA256; 2390 } 2391 break; 2392 } 2393 2394 alg->cra_module = THIS_MODULE; 2395 alg->cra_priority = TALITOS_CRA_PRIORITY; 2396 alg->cra_alignmask = 0; 2397 alg->cra_ctxsize = sizeof(struct talitos_ctx); 2398 2399 t_alg->dev = dev; 2400 2401 return t_alg; 2402 } 2403 2404 static int talitos_probe(struct platform_device *ofdev, 2405 const struct of_device_id *match) 2406 { 2407 struct device *dev = &ofdev->dev; 2408 struct device_node *np = ofdev->dev.of_node; 2409 struct talitos_private *priv; 2410 const unsigned int *prop; 2411 int i, err; 2412 2413 priv = kzalloc(sizeof(struct talitos_private), GFP_KERNEL); 2414 if (!priv) 2415 return -ENOMEM; 2416 2417 dev_set_drvdata(dev, priv); 2418 2419 priv->ofdev = ofdev; 2420 2421 tasklet_init(&priv->done_task, talitos_done, (unsigned long)dev); 2422 2423 INIT_LIST_HEAD(&priv->alg_list); 2424 2425 priv->irq = irq_of_parse_and_map(np, 0); 2426 2427 if (priv->irq == NO_IRQ) { 2428 dev_err(dev, "failed to map irq\n"); 2429 err = -EINVAL; 2430 goto err_out; 2431 } 2432 2433 /* get the irq line */ 2434 err = request_irq(priv->irq, talitos_interrupt, 0, 2435 dev_driver_string(dev), dev); 2436 if (err) { 2437 dev_err(dev, "failed to request irq %d\n", priv->irq); 2438 irq_dispose_mapping(priv->irq); 2439 priv->irq = NO_IRQ; 2440 goto err_out; 2441 } 2442 2443 priv->reg = of_iomap(np, 0); 2444 if (!priv->reg) { 2445 dev_err(dev, "failed to of_iomap\n"); 2446 err = -ENOMEM; 2447 goto err_out; 2448 } 2449 2450 /* get SEC version capabilities from device tree */ 2451 prop = of_get_property(np, "fsl,num-channels", NULL); 2452 if (prop) 2453 priv->num_channels = *prop; 2454 2455 prop = of_get_property(np, "fsl,channel-fifo-len", NULL); 2456 if (prop) 2457 priv->chfifo_len = *prop; 2458 2459 prop = of_get_property(np, "fsl,exec-units-mask", NULL); 2460 if (prop) 2461 priv->exec_units = *prop; 2462 2463 prop = of_get_property(np, "fsl,descriptor-types-mask", NULL); 2464 if (prop) 2465 priv->desc_types = *prop; 2466 2467 if (!is_power_of_2(priv->num_channels) || !priv->chfifo_len || 2468 !priv->exec_units || !priv->desc_types) { 2469 dev_err(dev, "invalid property data in device tree node\n"); 2470 err = -EINVAL; 2471 goto err_out; 2472 } 2473 2474 if (of_device_is_compatible(np, "fsl,sec3.0")) 2475 priv->features |= TALITOS_FTR_SRC_LINK_TBL_LEN_INCLUDES_EXTENT; 2476 2477 if (of_device_is_compatible(np, "fsl,sec2.1")) 2478 priv->features |= TALITOS_FTR_HW_AUTH_CHECK | 2479 TALITOS_FTR_SHA224_HWINIT; 2480 2481 priv->chan = kzalloc(sizeof(struct talitos_channel) * 2482 priv->num_channels, GFP_KERNEL); 2483 if (!priv->chan) { 2484 dev_err(dev, "failed to allocate channel management space\n"); 2485 err = -ENOMEM; 2486 goto err_out; 2487 } 2488 2489 for (i = 0; i < priv->num_channels; i++) { 2490 spin_lock_init(&priv->chan[i].head_lock); 2491 spin_lock_init(&priv->chan[i].tail_lock); 2492 } 2493 2494 priv->fifo_len = roundup_pow_of_two(priv->chfifo_len); 2495 2496 for (i = 0; i < priv->num_channels; i++) { 2497 priv->chan[i].fifo = kzalloc(sizeof(struct talitos_request) * 2498 priv->fifo_len, GFP_KERNEL); 2499 if (!priv->chan[i].fifo) { 2500 dev_err(dev, "failed to allocate request fifo %d\n", i); 2501 err = -ENOMEM; 2502 goto err_out; 2503 } 2504 } 2505 2506 for (i = 0; i < priv->num_channels; i++) 2507 atomic_set(&priv->chan[i].submit_count, 2508 -(priv->chfifo_len - 1)); 2509 2510 dma_set_mask(dev, DMA_BIT_MASK(36)); 2511 2512 /* reset and initialize the h/w */ 2513 err = init_device(dev); 2514 if (err) { 2515 dev_err(dev, "failed to initialize device\n"); 2516 goto err_out; 2517 } 2518 2519 /* register the RNG, if available */ 2520 if (hw_supports(dev, DESC_HDR_SEL0_RNG)) { 2521 err = talitos_register_rng(dev); 2522 if (err) { 2523 dev_err(dev, "failed to register hwrng: %d\n", err); 2524 goto err_out; 2525 } else 2526 dev_info(dev, "hwrng\n"); 2527 } 2528 2529 /* register crypto algorithms the device supports */ 2530 for (i = 0; i < ARRAY_SIZE(driver_algs); i++) { 2531 if (hw_supports(dev, driver_algs[i].desc_hdr_template)) { 2532 struct talitos_crypto_alg *t_alg; 2533 char *name = NULL; 2534 2535 t_alg = talitos_alg_alloc(dev, &driver_algs[i]); 2536 if (IS_ERR(t_alg)) { 2537 err = PTR_ERR(t_alg); 2538 goto err_out; 2539 } 2540 2541 switch (t_alg->algt.type) { 2542 case CRYPTO_ALG_TYPE_ABLKCIPHER: 2543 case CRYPTO_ALG_TYPE_AEAD: 2544 err = crypto_register_alg( 2545 &t_alg->algt.alg.crypto); 2546 name = t_alg->algt.alg.crypto.cra_driver_name; 2547 break; 2548 case CRYPTO_ALG_TYPE_AHASH: 2549 err = crypto_register_ahash( 2550 &t_alg->algt.alg.hash); 2551 name = 2552 t_alg->algt.alg.hash.halg.base.cra_driver_name; 2553 break; 2554 } 2555 if (err) { 2556 dev_err(dev, "%s alg registration failed\n", 2557 name); 2558 kfree(t_alg); 2559 } else { 2560 list_add_tail(&t_alg->entry, &priv->alg_list); 2561 dev_info(dev, "%s\n", name); 2562 } 2563 } 2564 } 2565 2566 return 0; 2567 2568 err_out: 2569 talitos_remove(ofdev); 2570 2571 return err; 2572 } 2573 2574 static const struct of_device_id talitos_match[] = { 2575 { 2576 .compatible = "fsl,sec2.0", 2577 }, 2578 {}, 2579 }; 2580 MODULE_DEVICE_TABLE(of, talitos_match); 2581 2582 static struct of_platform_driver talitos_driver = { 2583 .driver = { 2584 .name = "talitos", 2585 .owner = THIS_MODULE, 2586 .of_match_table = talitos_match, 2587 }, 2588 .probe = talitos_probe, 2589 .remove = talitos_remove, 2590 }; 2591 2592 static int __init talitos_init(void) 2593 { 2594 return of_register_platform_driver(&talitos_driver); 2595 } 2596 module_init(talitos_init); 2597 2598 static void __exit talitos_exit(void) 2599 { 2600 of_unregister_platform_driver(&talitos_driver); 2601 } 2602 module_exit(talitos_exit); 2603 2604 MODULE_LICENSE("GPL"); 2605 MODULE_AUTHOR("Kim Phillips <kim.phillips@freescale.com>"); 2606 MODULE_DESCRIPTION("Freescale integrated security engine (SEC) driver"); 2607