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Linux 4.18.10
[linux/fpc-iii.git] / drivers / crypto / ccp / ccp-ops.c
blob0ea43cdeb05f0f4c5c38a332b30faf1cc67f4c6e
1 /*
2 * AMD Cryptographic Coprocessor (CCP) driver
3 *
4 * Copyright (C) 2013,2017 Advanced Micro Devices, Inc.
5 *
6 * Author: Tom Lendacky <thomas.lendacky@amd.com>
7 * Author: Gary R Hook <gary.hook@amd.com>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/pci.h>
17 #include <linux/interrupt.h>
18 #include <crypto/scatterwalk.h>
19 #include <crypto/des.h>
20 #include <linux/ccp.h>
21
22 #include "ccp-dev.h"
23
24 /* SHA initial context values */
25 static const __be32 ccp_sha1_init[SHA1_DIGEST_SIZE / sizeof(__be32)] = {
26 cpu_to_be32(SHA1_H0), cpu_to_be32(SHA1_H1),
27 cpu_to_be32(SHA1_H2), cpu_to_be32(SHA1_H3),
28 cpu_to_be32(SHA1_H4),
29 };
30
31 static const __be32 ccp_sha224_init[SHA256_DIGEST_SIZE / sizeof(__be32)] = {
32 cpu_to_be32(SHA224_H0), cpu_to_be32(SHA224_H1),
33 cpu_to_be32(SHA224_H2), cpu_to_be32(SHA224_H3),
34 cpu_to_be32(SHA224_H4), cpu_to_be32(SHA224_H5),
35 cpu_to_be32(SHA224_H6), cpu_to_be32(SHA224_H7),
36 };
37
38 static const __be32 ccp_sha256_init[SHA256_DIGEST_SIZE / sizeof(__be32)] = {
39 cpu_to_be32(SHA256_H0), cpu_to_be32(SHA256_H1),
40 cpu_to_be32(SHA256_H2), cpu_to_be32(SHA256_H3),
41 cpu_to_be32(SHA256_H4), cpu_to_be32(SHA256_H5),
42 cpu_to_be32(SHA256_H6), cpu_to_be32(SHA256_H7),
43 };
44
45 static const __be64 ccp_sha384_init[SHA512_DIGEST_SIZE / sizeof(__be64)] = {
46 cpu_to_be64(SHA384_H0), cpu_to_be64(SHA384_H1),
47 cpu_to_be64(SHA384_H2), cpu_to_be64(SHA384_H3),
48 cpu_to_be64(SHA384_H4), cpu_to_be64(SHA384_H5),
49 cpu_to_be64(SHA384_H6), cpu_to_be64(SHA384_H7),
50 };
51
52 static const __be64 ccp_sha512_init[SHA512_DIGEST_SIZE / sizeof(__be64)] = {
53 cpu_to_be64(SHA512_H0), cpu_to_be64(SHA512_H1),
54 cpu_to_be64(SHA512_H2), cpu_to_be64(SHA512_H3),
55 cpu_to_be64(SHA512_H4), cpu_to_be64(SHA512_H5),
56 cpu_to_be64(SHA512_H6), cpu_to_be64(SHA512_H7),
57 };
58
59 #define CCP_NEW_JOBID(ccp) ((ccp->vdata->version == CCP_VERSION(3, 0)) ? \
60 ccp_gen_jobid(ccp) : 0)
61
62 static u32 ccp_gen_jobid(struct ccp_device *ccp)
63 {
64 return atomic_inc_return(&ccp->current_id) & CCP_JOBID_MASK;
65 }
66
67 static void ccp_sg_free(struct ccp_sg_workarea *wa)
68 {
69 if (wa->dma_count)
70 dma_unmap_sg(wa->dma_dev, wa->dma_sg, wa->nents, wa->dma_dir);
71
72 wa->dma_count = 0;
73 }
74
75 static int ccp_init_sg_workarea(struct ccp_sg_workarea *wa, struct device *dev,
76 struct scatterlist *sg, u64 len,
77 enum dma_data_direction dma_dir)
78 {
79 memset(wa, 0, sizeof(*wa));
80
81 wa->sg = sg;
82 if (!sg)
83 return 0;
84
85 wa->nents = sg_nents_for_len(sg, len);
86 if (wa->nents < 0)
87 return wa->nents;
88
89 wa->bytes_left = len;
90 wa->sg_used = 0;
91
92 if (len == 0)
93 return 0;
94
95 if (dma_dir == DMA_NONE)
96 return 0;
97
98 wa->dma_sg = sg;
99 wa->dma_dev = dev;
100 wa->dma_dir = dma_dir;
101 wa->dma_count = dma_map_sg(dev, sg, wa->nents, dma_dir);
102 if (!wa->dma_count)
103 return -ENOMEM;
104
105 return 0;
106 }
107
108 static void ccp_update_sg_workarea(struct ccp_sg_workarea *wa, unsigned int len)
109 {
110 unsigned int nbytes = min_t(u64, len, wa->bytes_left);
111
112 if (!wa->sg)
113 return;
114
115 wa->sg_used += nbytes;
116 wa->bytes_left -= nbytes;
117 if (wa->sg_used == wa->sg->length) {
118 wa->sg = sg_next(wa->sg);
119 wa->sg_used = 0;
120 }
121 }
122
123 static void ccp_dm_free(struct ccp_dm_workarea *wa)
124 {
125 if (wa->length <= CCP_DMAPOOL_MAX_SIZE) {
126 if (wa->address)
127 dma_pool_free(wa->dma_pool, wa->address,
128 wa->dma.address);
129 } else {
130 if (wa->dma.address)
131 dma_unmap_single(wa->dev, wa->dma.address, wa->length,
132 wa->dma.dir);
133 kfree(wa->address);
134 }
135
136 wa->address = NULL;
137 wa->dma.address = 0;
138 }
139
140 static int ccp_init_dm_workarea(struct ccp_dm_workarea *wa,
141 struct ccp_cmd_queue *cmd_q,
142 unsigned int len,
143 enum dma_data_direction dir)
144 {
145 memset(wa, 0, sizeof(*wa));
146
147 if (!len)
148 return 0;
149
150 wa->dev = cmd_q->ccp->dev;
151 wa->length = len;
152
153 if (len <= CCP_DMAPOOL_MAX_SIZE) {
154 wa->dma_pool = cmd_q->dma_pool;
155
156 wa->address = dma_pool_alloc(wa->dma_pool, GFP_KERNEL,
157 &wa->dma.address);
158 if (!wa->address)
159 return -ENOMEM;
160
161 wa->dma.length = CCP_DMAPOOL_MAX_SIZE;
162
163 memset(wa->address, 0, CCP_DMAPOOL_MAX_SIZE);
164 } else {
165 wa->address = kzalloc(len, GFP_KERNEL);
166 if (!wa->address)
167 return -ENOMEM;
168
169 wa->dma.address = dma_map_single(wa->dev, wa->address, len,
170 dir);
171 if (dma_mapping_error(wa->dev, wa->dma.address))
172 return -ENOMEM;
173
174 wa->dma.length = len;
175 }
176 wa->dma.dir = dir;
177
178 return 0;
179 }
180
181 static int ccp_set_dm_area(struct ccp_dm_workarea *wa, unsigned int wa_offset,
182 struct scatterlist *sg, unsigned int sg_offset,
183 unsigned int len)
184 {
185 WARN_ON(!wa->address);
186
187 if (len > (wa->length - wa_offset))
188 return -EINVAL;
189
190 scatterwalk_map_and_copy(wa->address + wa_offset, sg, sg_offset, len,
191 0);
192 return 0;
193 }
194
195 static void ccp_get_dm_area(struct ccp_dm_workarea *wa, unsigned int wa_offset,
196 struct scatterlist *sg, unsigned int sg_offset,
197 unsigned int len)
198 {
199 WARN_ON(!wa->address);
200
201 scatterwalk_map_and_copy(wa->address + wa_offset, sg, sg_offset, len,
202 1);
203 }
204
205 static int ccp_reverse_set_dm_area(struct ccp_dm_workarea *wa,
206 unsigned int wa_offset,
207 struct scatterlist *sg,
208 unsigned int sg_offset,
209 unsigned int len)
210 {
211 u8 *p, *q;
212 int rc;
213
214 rc = ccp_set_dm_area(wa, wa_offset, sg, sg_offset, len);
215 if (rc)
216 return rc;
217
218 p = wa->address + wa_offset;
219 q = p + len - 1;
220 while (p < q) {
221 *p = *p ^ *q;
222 *q = *p ^ *q;
223 *p = *p ^ *q;
224 p++;
225 q--;
226 }
227 return 0;
228 }
229
230 static void ccp_reverse_get_dm_area(struct ccp_dm_workarea *wa,
231 unsigned int wa_offset,
232 struct scatterlist *sg,
233 unsigned int sg_offset,
234 unsigned int len)
235 {
236 u8 *p, *q;
237
238 p = wa->address + wa_offset;
239 q = p + len - 1;
240 while (p < q) {
241 *p = *p ^ *q;
242 *q = *p ^ *q;
243 *p = *p ^ *q;
244 p++;
245 q--;
246 }
247
248 ccp_get_dm_area(wa, wa_offset, sg, sg_offset, len);
249 }
250
251 static void ccp_free_data(struct ccp_data *data, struct ccp_cmd_queue *cmd_q)
252 {
253 ccp_dm_free(&data->dm_wa);
254 ccp_sg_free(&data->sg_wa);
255 }
256
257 static int ccp_init_data(struct ccp_data *data, struct ccp_cmd_queue *cmd_q,
258 struct scatterlist *sg, u64 sg_len,
259 unsigned int dm_len,
260 enum dma_data_direction dir)
261 {
262 int ret;
263
264 memset(data, 0, sizeof(*data));
265
266 ret = ccp_init_sg_workarea(&data->sg_wa, cmd_q->ccp->dev, sg, sg_len,
267 dir);
268 if (ret)
269 goto e_err;
270
271 ret = ccp_init_dm_workarea(&data->dm_wa, cmd_q, dm_len, dir);
272 if (ret)
273 goto e_err;
274
275 return 0;
276
277 e_err:
278 ccp_free_data(data, cmd_q);
279
280 return ret;
281 }
282
283 static unsigned int ccp_queue_buf(struct ccp_data *data, unsigned int from)
284 {
285 struct ccp_sg_workarea *sg_wa = &data->sg_wa;
286 struct ccp_dm_workarea *dm_wa = &data->dm_wa;
287 unsigned int buf_count, nbytes;
288
289 /* Clear the buffer if setting it */
290 if (!from)
291 memset(dm_wa->address, 0, dm_wa->length);
292
293 if (!sg_wa->sg)
294 return 0;
295
296 /* Perform the copy operation
297 * nbytes will always be <= UINT_MAX because dm_wa->length is
298 * an unsigned int
299 */
300 nbytes = min_t(u64, sg_wa->bytes_left, dm_wa->length);
301 scatterwalk_map_and_copy(dm_wa->address, sg_wa->sg, sg_wa->sg_used,
302 nbytes, from);
303
304 /* Update the structures and generate the count */
305 buf_count = 0;
306 while (sg_wa->bytes_left && (buf_count < dm_wa->length)) {
307 nbytes = min(sg_wa->sg->length - sg_wa->sg_used,
308 dm_wa->length - buf_count);
309 nbytes = min_t(u64, sg_wa->bytes_left, nbytes);
310
311 buf_count += nbytes;
312 ccp_update_sg_workarea(sg_wa, nbytes);
313 }
314
315 return buf_count;
316 }
317
318 static unsigned int ccp_fill_queue_buf(struct ccp_data *data)
319 {
320 return ccp_queue_buf(data, 0);
321 }
322
323 static unsigned int ccp_empty_queue_buf(struct ccp_data *data)
324 {
325 return ccp_queue_buf(data, 1);
326 }
327
328 static void ccp_prepare_data(struct ccp_data *src, struct ccp_data *dst,
329 struct ccp_op *op, unsigned int block_size,
330 bool blocksize_op)
331 {
332 unsigned int sg_src_len, sg_dst_len, op_len;
333
334 /* The CCP can only DMA from/to one address each per operation. This
335 * requires that we find the smallest DMA area between the source
336 * and destination. The resulting len values will always be <= UINT_MAX
337 * because the dma length is an unsigned int.
338 */
339 sg_src_len = sg_dma_len(src->sg_wa.sg) - src->sg_wa.sg_used;
340 sg_src_len = min_t(u64, src->sg_wa.bytes_left, sg_src_len);
341
342 if (dst) {
343 sg_dst_len = sg_dma_len(dst->sg_wa.sg) - dst->sg_wa.sg_used;
344 sg_dst_len = min_t(u64, src->sg_wa.bytes_left, sg_dst_len);
345 op_len = min(sg_src_len, sg_dst_len);
346 } else {
347 op_len = sg_src_len;
348 }
349
350 /* The data operation length will be at least block_size in length
351 * or the smaller of available sg room remaining for the source or
352 * the destination
353 */
354 op_len = max(op_len, block_size);
355
356 /* Unless we have to buffer data, there's no reason to wait */
357 op->soc = 0;
358
359 if (sg_src_len < block_size) {
360 /* Not enough data in the sg element, so it
361 * needs to be buffered into a blocksize chunk
362 */
363 int cp_len = ccp_fill_queue_buf(src);
364
365 op->soc = 1;
366 op->src.u.dma.address = src->dm_wa.dma.address;
367 op->src.u.dma.offset = 0;
368 op->src.u.dma.length = (blocksize_op) ? block_size : cp_len;
369 } else {
370 /* Enough data in the sg element, but we need to
371 * adjust for any previously copied data
372 */
373 op->src.u.dma.address = sg_dma_address(src->sg_wa.sg);
374 op->src.u.dma.offset = src->sg_wa.sg_used;
375 op->src.u.dma.length = op_len & ~(block_size - 1);
376
377 ccp_update_sg_workarea(&src->sg_wa, op->src.u.dma.length);
378 }
379
380 if (dst) {
381 if (sg_dst_len < block_size) {
382 /* Not enough room in the sg element or we're on the
383 * last piece of data (when using padding), so the
384 * output needs to be buffered into a blocksize chunk
385 */
386 op->soc = 1;
387 op->dst.u.dma.address = dst->dm_wa.dma.address;
388 op->dst.u.dma.offset = 0;
389 op->dst.u.dma.length = op->src.u.dma.length;
390 } else {
391 /* Enough room in the sg element, but we need to
392 * adjust for any previously used area
393 */
394 op->dst.u.dma.address = sg_dma_address(dst->sg_wa.sg);
395 op->dst.u.dma.offset = dst->sg_wa.sg_used;
396 op->dst.u.dma.length = op->src.u.dma.length;
397 }
398 }
399 }
400
401 static void ccp_process_data(struct ccp_data *src, struct ccp_data *dst,
402 struct ccp_op *op)
403 {
404 op->init = 0;
405
406 if (dst) {
407 if (op->dst.u.dma.address == dst->dm_wa.dma.address)
408 ccp_empty_queue_buf(dst);
409 else
410 ccp_update_sg_workarea(&dst->sg_wa,
411 op->dst.u.dma.length);
412 }
413 }
414
415 static int ccp_copy_to_from_sb(struct ccp_cmd_queue *cmd_q,
416 struct ccp_dm_workarea *wa, u32 jobid, u32 sb,
417 u32 byte_swap, bool from)
418 {
419 struct ccp_op op;
420
421 memset(&op, 0, sizeof(op));
422
423 op.cmd_q = cmd_q;
424 op.jobid = jobid;
425 op.eom = 1;
426
427 if (from) {
428 op.soc = 1;
429 op.src.type = CCP_MEMTYPE_SB;
430 op.src.u.sb = sb;
431 op.dst.type = CCP_MEMTYPE_SYSTEM;
432 op.dst.u.dma.address = wa->dma.address;
433 op.dst.u.dma.length = wa->length;
434 } else {
435 op.src.type = CCP_MEMTYPE_SYSTEM;
436 op.src.u.dma.address = wa->dma.address;
437 op.src.u.dma.length = wa->length;
438 op.dst.type = CCP_MEMTYPE_SB;
439 op.dst.u.sb = sb;
440 }
441
442 op.u.passthru.byte_swap = byte_swap;
443
444 return cmd_q->ccp->vdata->perform->passthru(&op);
445 }
446
447 static int ccp_copy_to_sb(struct ccp_cmd_queue *cmd_q,
448 struct ccp_dm_workarea *wa, u32 jobid, u32 sb,
449 u32 byte_swap)
450 {
451 return ccp_copy_to_from_sb(cmd_q, wa, jobid, sb, byte_swap, false);
452 }
453
454 static int ccp_copy_from_sb(struct ccp_cmd_queue *cmd_q,
455 struct ccp_dm_workarea *wa, u32 jobid, u32 sb,
456 u32 byte_swap)
457 {
458 return ccp_copy_to_from_sb(cmd_q, wa, jobid, sb, byte_swap, true);
459 }
460
461 static int ccp_run_aes_cmac_cmd(struct ccp_cmd_queue *cmd_q,
462 struct ccp_cmd *cmd)
463 {
464 struct ccp_aes_engine *aes = &cmd->u.aes;
465 struct ccp_dm_workarea key, ctx;
466 struct ccp_data src;
467 struct ccp_op op;
468 unsigned int dm_offset;
469 int ret;
470
471 if (!((aes->key_len == AES_KEYSIZE_128) ||
472 (aes->key_len == AES_KEYSIZE_192) ||
473 (aes->key_len == AES_KEYSIZE_256)))
474 return -EINVAL;
475
476 if (aes->src_len & (AES_BLOCK_SIZE - 1))
477 return -EINVAL;
478
479 if (aes->iv_len != AES_BLOCK_SIZE)
480 return -EINVAL;
481
482 if (!aes->key || !aes->iv || !aes->src)
483 return -EINVAL;
484
485 if (aes->cmac_final) {
486 if (aes->cmac_key_len != AES_BLOCK_SIZE)
487 return -EINVAL;
488
489 if (!aes->cmac_key)
490 return -EINVAL;
491 }
492
493 BUILD_BUG_ON(CCP_AES_KEY_SB_COUNT != 1);
494 BUILD_BUG_ON(CCP_AES_CTX_SB_COUNT != 1);
495
496 ret = -EIO;
497 memset(&op, 0, sizeof(op));
498 op.cmd_q = cmd_q;
499 op.jobid = CCP_NEW_JOBID(cmd_q->ccp);
500 op.sb_key = cmd_q->sb_key;
501 op.sb_ctx = cmd_q->sb_ctx;
502 op.init = 1;
503 op.u.aes.type = aes->type;
504 op.u.aes.mode = aes->mode;
505 op.u.aes.action = aes->action;
506
507 /* All supported key sizes fit in a single (32-byte) SB entry
508 * and must be in little endian format. Use the 256-bit byte
509 * swap passthru option to convert from big endian to little
510 * endian.
511 */
512 ret = ccp_init_dm_workarea(&key, cmd_q,
513 CCP_AES_KEY_SB_COUNT * CCP_SB_BYTES,
514 DMA_TO_DEVICE);
515 if (ret)
516 return ret;
517
518 dm_offset = CCP_SB_BYTES - aes->key_len;
519 ret = ccp_set_dm_area(&key, dm_offset, aes->key, 0, aes->key_len);
520 if (ret)
521 goto e_key;
522 ret = ccp_copy_to_sb(cmd_q, &key, op.jobid, op.sb_key,
523 CCP_PASSTHRU_BYTESWAP_256BIT);
524 if (ret) {
525 cmd->engine_error = cmd_q->cmd_error;
526 goto e_key;
527 }
528
529 /* The AES context fits in a single (32-byte) SB entry and
530 * must be in little endian format. Use the 256-bit byte swap
531 * passthru option to convert from big endian to little endian.
532 */
533 ret = ccp_init_dm_workarea(&ctx, cmd_q,
534 CCP_AES_CTX_SB_COUNT * CCP_SB_BYTES,
535 DMA_BIDIRECTIONAL);
536 if (ret)
537 goto e_key;
538
539 dm_offset = CCP_SB_BYTES - AES_BLOCK_SIZE;
540 ret = ccp_set_dm_area(&ctx, dm_offset, aes->iv, 0, aes->iv_len);
541 if (ret)
542 goto e_ctx;
543 ret = ccp_copy_to_sb(cmd_q, &ctx, op.jobid, op.sb_ctx,
544 CCP_PASSTHRU_BYTESWAP_256BIT);
545 if (ret) {
546 cmd->engine_error = cmd_q->cmd_error;
547 goto e_ctx;
548 }
549
550 /* Send data to the CCP AES engine */
551 ret = ccp_init_data(&src, cmd_q, aes->src, aes->src_len,
552 AES_BLOCK_SIZE, DMA_TO_DEVICE);
553 if (ret)
554 goto e_ctx;
555
556 while (src.sg_wa.bytes_left) {
557 ccp_prepare_data(&src, NULL, &op, AES_BLOCK_SIZE, true);
558 if (aes->cmac_final && !src.sg_wa.bytes_left) {
559 op.eom = 1;
560
561 /* Push the K1/K2 key to the CCP now */
562 ret = ccp_copy_from_sb(cmd_q, &ctx, op.jobid,
563 op.sb_ctx,
564 CCP_PASSTHRU_BYTESWAP_256BIT);
565 if (ret) {
566 cmd->engine_error = cmd_q->cmd_error;
567 goto e_src;
568 }
569
570 ret = ccp_set_dm_area(&ctx, 0, aes->cmac_key, 0,
571 aes->cmac_key_len);
572 if (ret)
573 goto e_src;
574 ret = ccp_copy_to_sb(cmd_q, &ctx, op.jobid, op.sb_ctx,
575 CCP_PASSTHRU_BYTESWAP_256BIT);
576 if (ret) {
577 cmd->engine_error = cmd_q->cmd_error;
578 goto e_src;
579 }
580 }
581
582 ret = cmd_q->ccp->vdata->perform->aes(&op);
583 if (ret) {
584 cmd->engine_error = cmd_q->cmd_error;
585 goto e_src;
586 }
587
588 ccp_process_data(&src, NULL, &op);
589 }
590
591 /* Retrieve the AES context - convert from LE to BE using
592 * 32-byte (256-bit) byteswapping
593 */
594 ret = ccp_copy_from_sb(cmd_q, &ctx, op.jobid, op.sb_ctx,
595 CCP_PASSTHRU_BYTESWAP_256BIT);
596 if (ret) {
597 cmd->engine_error = cmd_q->cmd_error;
598 goto e_src;
599 }
600
601 /* ...but we only need AES_BLOCK_SIZE bytes */
602 dm_offset = CCP_SB_BYTES - AES_BLOCK_SIZE;
603 ccp_get_dm_area(&ctx, dm_offset, aes->iv, 0, aes->iv_len);
604
605 e_src:
606 ccp_free_data(&src, cmd_q);
607
608 e_ctx:
609 ccp_dm_free(&ctx);
610
611 e_key:
612 ccp_dm_free(&key);
613
614 return ret;
615 }
616
617 static int ccp_run_aes_gcm_cmd(struct ccp_cmd_queue *cmd_q,
618 struct ccp_cmd *cmd)
619 {
620 struct ccp_aes_engine *aes = &cmd->u.aes;
621 struct ccp_dm_workarea key, ctx, final_wa, tag;
622 struct ccp_data src, dst;
623 struct ccp_data aad;
624 struct ccp_op op;
625
626 unsigned long long *final;
627 unsigned int dm_offset;
628 unsigned int ilen;
629 bool in_place = true; /* Default value */
630 int ret;
631
632 struct scatterlist *p_inp, sg_inp[2];
633 struct scatterlist *p_tag, sg_tag[2];
634 struct scatterlist *p_outp, sg_outp[2];
635 struct scatterlist *p_aad;
636
637 if (!aes->iv)
638 return -EINVAL;
639
640 if (!((aes->key_len == AES_KEYSIZE_128) ||
641 (aes->key_len == AES_KEYSIZE_192) ||
642 (aes->key_len == AES_KEYSIZE_256)))
643 return -EINVAL;
644
645 if (!aes->key) /* Gotta have a key SGL */
646 return -EINVAL;
647
648 /* First, decompose the source buffer into AAD & PT,
649 * and the destination buffer into AAD, CT & tag, or
650 * the input into CT & tag.
651 * It is expected that the input and output SGs will
652 * be valid, even if the AAD and input lengths are 0.
653 */
654 p_aad = aes->src;
655 p_inp = scatterwalk_ffwd(sg_inp, aes->src, aes->aad_len);
656 p_outp = scatterwalk_ffwd(sg_outp, aes->dst, aes->aad_len);
657 if (aes->action == CCP_AES_ACTION_ENCRYPT) {
658 ilen = aes->src_len;
659 p_tag = scatterwalk_ffwd(sg_tag, p_outp, ilen);
660 } else {
661 /* Input length for decryption includes tag */
662 ilen = aes->src_len - AES_BLOCK_SIZE;
663 p_tag = scatterwalk_ffwd(sg_tag, p_inp, ilen);
664 }
665
666 memset(&op, 0, sizeof(op));
667 op.cmd_q = cmd_q;
668 op.jobid = CCP_NEW_JOBID(cmd_q->ccp);
669 op.sb_key = cmd_q->sb_key; /* Pre-allocated */
670 op.sb_ctx = cmd_q->sb_ctx; /* Pre-allocated */
671 op.init = 1;
672 op.u.aes.type = aes->type;
673
674 /* Copy the key to the LSB */
675 ret = ccp_init_dm_workarea(&key, cmd_q,
676 CCP_AES_CTX_SB_COUNT * CCP_SB_BYTES,
677 DMA_TO_DEVICE);
678 if (ret)
679 return ret;
680
681 dm_offset = CCP_SB_BYTES - aes->key_len;
682 ret = ccp_set_dm_area(&key, dm_offset, aes->key, 0, aes->key_len);
683 if (ret)
684 goto e_key;
685 ret = ccp_copy_to_sb(cmd_q, &key, op.jobid, op.sb_key,
686 CCP_PASSTHRU_BYTESWAP_256BIT);
687 if (ret) {
688 cmd->engine_error = cmd_q->cmd_error;
689 goto e_key;
690 }
691
692 /* Copy the context (IV) to the LSB.
693 * There is an assumption here that the IV is 96 bits in length, plus
694 * a nonce of 32 bits. If no IV is present, use a zeroed buffer.
695 */
696 ret = ccp_init_dm_workarea(&ctx, cmd_q,
697 CCP_AES_CTX_SB_COUNT * CCP_SB_BYTES,
698 DMA_BIDIRECTIONAL);
699 if (ret)
700 goto e_key;
701
702 dm_offset = CCP_AES_CTX_SB_COUNT * CCP_SB_BYTES - aes->iv_len;
703 ret = ccp_set_dm_area(&ctx, dm_offset, aes->iv, 0, aes->iv_len);
704 if (ret)
705 goto e_ctx;
706
707 ret = ccp_copy_to_sb(cmd_q, &ctx, op.jobid, op.sb_ctx,
708 CCP_PASSTHRU_BYTESWAP_256BIT);
709 if (ret) {
710 cmd->engine_error = cmd_q->cmd_error;
711 goto e_ctx;
712 }
713
714 op.init = 1;
715 if (aes->aad_len > 0) {
716 /* Step 1: Run a GHASH over the Additional Authenticated Data */
717 ret = ccp_init_data(&aad, cmd_q, p_aad, aes->aad_len,
718 AES_BLOCK_SIZE,
719 DMA_TO_DEVICE);
720 if (ret)
721 goto e_ctx;
722
723 op.u.aes.mode = CCP_AES_MODE_GHASH;
724 op.u.aes.action = CCP_AES_GHASHAAD;
725
726 while (aad.sg_wa.bytes_left) {
727 ccp_prepare_data(&aad, NULL, &op, AES_BLOCK_SIZE, true);
728
729 ret = cmd_q->ccp->vdata->perform->aes(&op);
730 if (ret) {
731 cmd->engine_error = cmd_q->cmd_error;
732 goto e_aad;
733 }
734
735 ccp_process_data(&aad, NULL, &op);
736 op.init = 0;
737 }
738 }
739
740 op.u.aes.mode = CCP_AES_MODE_GCTR;
741 op.u.aes.action = aes->action;
742
743 if (ilen > 0) {
744 /* Step 2: Run a GCTR over the plaintext */
745 in_place = (sg_virt(p_inp) == sg_virt(p_outp)) ? true : false;
746
747 ret = ccp_init_data(&src, cmd_q, p_inp, ilen,
748 AES_BLOCK_SIZE,
749 in_place ? DMA_BIDIRECTIONAL
750 : DMA_TO_DEVICE);
751 if (ret)
752 goto e_ctx;
753
754 if (in_place) {
755 dst = src;
756 } else {
757 ret = ccp_init_data(&dst, cmd_q, p_outp, ilen,
758 AES_BLOCK_SIZE, DMA_FROM_DEVICE);
759 if (ret)
760 goto e_src;
761 }
762
763 op.soc = 0;
764 op.eom = 0;
765 op.init = 1;
766 while (src.sg_wa.bytes_left) {
767 ccp_prepare_data(&src, &dst, &op, AES_BLOCK_SIZE, true);
768 if (!src.sg_wa.bytes_left) {
769 unsigned int nbytes = aes->src_len
770 % AES_BLOCK_SIZE;
771
772 if (nbytes) {
773 op.eom = 1;
774 op.u.aes.size = (nbytes * 8) - 1;
775 }
776 }
777
778 ret = cmd_q->ccp->vdata->perform->aes(&op);
779 if (ret) {
780 cmd->engine_error = cmd_q->cmd_error;
781 goto e_dst;
782 }
783
784 ccp_process_data(&src, &dst, &op);
785 op.init = 0;
786 }
787 }
788
789 /* Step 3: Update the IV portion of the context with the original IV */
790 ret = ccp_copy_from_sb(cmd_q, &ctx, op.jobid, op.sb_ctx,
791 CCP_PASSTHRU_BYTESWAP_256BIT);
792 if (ret) {
793 cmd->engine_error = cmd_q->cmd_error;
794 goto e_dst;
795 }
796
797 ret = ccp_set_dm_area(&ctx, dm_offset, aes->iv, 0, aes->iv_len);
798 if (ret)
799 goto e_dst;
800
801 ret = ccp_copy_to_sb(cmd_q, &ctx, op.jobid, op.sb_ctx,
802 CCP_PASSTHRU_BYTESWAP_256BIT);
803 if (ret) {
804 cmd->engine_error = cmd_q->cmd_error;
805 goto e_dst;
806 }
807
808 /* Step 4: Concatenate the lengths of the AAD and source, and
809 * hash that 16 byte buffer.
810 */
811 ret = ccp_init_dm_workarea(&final_wa, cmd_q, AES_BLOCK_SIZE,
812 DMA_BIDIRECTIONAL);
813 if (ret)
814 goto e_dst;
815 final = (unsigned long long *) final_wa.address;
816 final[0] = cpu_to_be64(aes->aad_len * 8);
817 final[1] = cpu_to_be64(ilen * 8);
818
819 op.u.aes.mode = CCP_AES_MODE_GHASH;
820 op.u.aes.action = CCP_AES_GHASHFINAL;
821 op.src.type = CCP_MEMTYPE_SYSTEM;
822 op.src.u.dma.address = final_wa.dma.address;
823 op.src.u.dma.length = AES_BLOCK_SIZE;
824 op.dst.type = CCP_MEMTYPE_SYSTEM;
825 op.dst.u.dma.address = final_wa.dma.address;
826 op.dst.u.dma.length = AES_BLOCK_SIZE;
827 op.eom = 1;
828 op.u.aes.size = 0;
829 ret = cmd_q->ccp->vdata->perform->aes(&op);
830 if (ret)
831 goto e_dst;
832
833 if (aes->action == CCP_AES_ACTION_ENCRYPT) {
834 /* Put the ciphered tag after the ciphertext. */
835 ccp_get_dm_area(&final_wa, 0, p_tag, 0, AES_BLOCK_SIZE);
836 } else {
837 /* Does this ciphered tag match the input? */
838 ret = ccp_init_dm_workarea(&tag, cmd_q, AES_BLOCK_SIZE,
839 DMA_BIDIRECTIONAL);
840 if (ret)
841 goto e_tag;
842 ret = ccp_set_dm_area(&tag, 0, p_tag, 0, AES_BLOCK_SIZE);
843 if (ret)
844 goto e_tag;
845
846 ret = memcmp(tag.address, final_wa.address, AES_BLOCK_SIZE);
847 ccp_dm_free(&tag);
848 }
849
850 e_tag:
851 ccp_dm_free(&final_wa);
852
853 e_dst:
854 if (aes->src_len && !in_place)
855 ccp_free_data(&dst, cmd_q);
856
857 e_src:
858 if (aes->src_len)
859 ccp_free_data(&src, cmd_q);
860
861 e_aad:
862 if (aes->aad_len)
863 ccp_free_data(&aad, cmd_q);
864
865 e_ctx:
866 ccp_dm_free(&ctx);
867
868 e_key:
869 ccp_dm_free(&key);
870
871 return ret;
872 }
873
874 static int ccp_run_aes_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd)
875 {
876 struct ccp_aes_engine *aes = &cmd->u.aes;
877 struct ccp_dm_workarea key, ctx;
878 struct ccp_data src, dst;
879 struct ccp_op op;
880 unsigned int dm_offset;
881 bool in_place = false;
882 int ret;
883
884 if (aes->mode == CCP_AES_MODE_CMAC)
885 return ccp_run_aes_cmac_cmd(cmd_q, cmd);
886
887 if (aes->mode == CCP_AES_MODE_GCM)
888 return ccp_run_aes_gcm_cmd(cmd_q, cmd);
889
890 if (!((aes->key_len == AES_KEYSIZE_128) ||
891 (aes->key_len == AES_KEYSIZE_192) ||
892 (aes->key_len == AES_KEYSIZE_256)))
893 return -EINVAL;
894
895 if (((aes->mode == CCP_AES_MODE_ECB) ||
896 (aes->mode == CCP_AES_MODE_CBC) ||
897 (aes->mode == CCP_AES_MODE_CFB)) &&
898 (aes->src_len & (AES_BLOCK_SIZE - 1)))
899 return -EINVAL;
900
901 if (!aes->key || !aes->src || !aes->dst)
902 return -EINVAL;
903
904 if (aes->mode != CCP_AES_MODE_ECB) {
905 if (aes->iv_len != AES_BLOCK_SIZE)
906 return -EINVAL;
907
908 if (!aes->iv)
909 return -EINVAL;
910 }
911
912 BUILD_BUG_ON(CCP_AES_KEY_SB_COUNT != 1);
913 BUILD_BUG_ON(CCP_AES_CTX_SB_COUNT != 1);
914
915 ret = -EIO;
916 memset(&op, 0, sizeof(op));
917 op.cmd_q = cmd_q;
918 op.jobid = CCP_NEW_JOBID(cmd_q->ccp);
919 op.sb_key = cmd_q->sb_key;
920 op.sb_ctx = cmd_q->sb_ctx;
921 op.init = (aes->mode == CCP_AES_MODE_ECB) ? 0 : 1;
922 op.u.aes.type = aes->type;
923 op.u.aes.mode = aes->mode;
924 op.u.aes.action = aes->action;
925
926 /* All supported key sizes fit in a single (32-byte) SB entry
927 * and must be in little endian format. Use the 256-bit byte
928 * swap passthru option to convert from big endian to little
929 * endian.
930 */
931 ret = ccp_init_dm_workarea(&key, cmd_q,
932 CCP_AES_KEY_SB_COUNT * CCP_SB_BYTES,
933 DMA_TO_DEVICE);
934 if (ret)
935 return ret;
936
937 dm_offset = CCP_SB_BYTES - aes->key_len;
938 ret = ccp_set_dm_area(&key, dm_offset, aes->key, 0, aes->key_len);
939 if (ret)
940 goto e_key;
941 ret = ccp_copy_to_sb(cmd_q, &key, op.jobid, op.sb_key,
942 CCP_PASSTHRU_BYTESWAP_256BIT);
943 if (ret) {
944 cmd->engine_error = cmd_q->cmd_error;
945 goto e_key;
946 }
947
948 /* The AES context fits in a single (32-byte) SB entry and
949 * must be in little endian format. Use the 256-bit byte swap
950 * passthru option to convert from big endian to little endian.
951 */
952 ret = ccp_init_dm_workarea(&ctx, cmd_q,
953 CCP_AES_CTX_SB_COUNT * CCP_SB_BYTES,
954 DMA_BIDIRECTIONAL);
955 if (ret)
956 goto e_key;
957
958 if (aes->mode != CCP_AES_MODE_ECB) {
959 /* Load the AES context - convert to LE */
960 dm_offset = CCP_SB_BYTES - AES_BLOCK_SIZE;
961 ret = ccp_set_dm_area(&ctx, dm_offset, aes->iv, 0, aes->iv_len);
962 if (ret)
963 goto e_ctx;
964 ret = ccp_copy_to_sb(cmd_q, &ctx, op.jobid, op.sb_ctx,
965 CCP_PASSTHRU_BYTESWAP_256BIT);
966 if (ret) {
967 cmd->engine_error = cmd_q->cmd_error;
968 goto e_ctx;
969 }
970 }
971 switch (aes->mode) {
972 case CCP_AES_MODE_CFB: /* CFB128 only */
973 case CCP_AES_MODE_CTR:
974 op.u.aes.size = AES_BLOCK_SIZE * BITS_PER_BYTE - 1;
975 break;
976 default:
977 op.u.aes.size = 0;
978 }
979
980 /* Prepare the input and output data workareas. For in-place
981 * operations we need to set the dma direction to BIDIRECTIONAL
982 * and copy the src workarea to the dst workarea.
983 */
984 if (sg_virt(aes->src) == sg_virt(aes->dst))
985 in_place = true;
986
987 ret = ccp_init_data(&src, cmd_q, aes->src, aes->src_len,
988 AES_BLOCK_SIZE,
989 in_place ? DMA_BIDIRECTIONAL : DMA_TO_DEVICE);
990 if (ret)
991 goto e_ctx;
992
993 if (in_place) {
994 dst = src;
995 } else {
996 ret = ccp_init_data(&dst, cmd_q, aes->dst, aes->src_len,
997 AES_BLOCK_SIZE, DMA_FROM_DEVICE);
998 if (ret)
999 goto e_src;
1000 }
1001
1002 /* Send data to the CCP AES engine */
1003 while (src.sg_wa.bytes_left) {
1004 ccp_prepare_data(&src, &dst, &op, AES_BLOCK_SIZE, true);
1005 if (!src.sg_wa.bytes_left) {
1006 op.eom = 1;
1007
1008 /* Since we don't retrieve the AES context in ECB
1009 * mode we have to wait for the operation to complete
1010 * on the last piece of data
1011 */
1012 if (aes->mode == CCP_AES_MODE_ECB)
1013 op.soc = 1;
1014 }
1015
1016 ret = cmd_q->ccp->vdata->perform->aes(&op);
1017 if (ret) {
1018 cmd->engine_error = cmd_q->cmd_error;
1019 goto e_dst;
1020 }
1021
1022 ccp_process_data(&src, &dst, &op);
1023 }
1024
1025 if (aes->mode != CCP_AES_MODE_ECB) {
1026 /* Retrieve the AES context - convert from LE to BE using
1027 * 32-byte (256-bit) byteswapping
1028 */
1029 ret = ccp_copy_from_sb(cmd_q, &ctx, op.jobid, op.sb_ctx,
1030 CCP_PASSTHRU_BYTESWAP_256BIT);
1031 if (ret) {
1032 cmd->engine_error = cmd_q->cmd_error;
1033 goto e_dst;
1034 }
1035
1036 /* ...but we only need AES_BLOCK_SIZE bytes */
1037 dm_offset = CCP_SB_BYTES - AES_BLOCK_SIZE;
1038 ccp_get_dm_area(&ctx, dm_offset, aes->iv, 0, aes->iv_len);
1039 }
1040
1041 e_dst:
1042 if (!in_place)
1043 ccp_free_data(&dst, cmd_q);
1044
1045 e_src:
1046 ccp_free_data(&src, cmd_q);
1047
1048 e_ctx:
1049 ccp_dm_free(&ctx);
1050
1051 e_key:
1052 ccp_dm_free(&key);
1053
1054 return ret;
1055 }
1056
1057 static int ccp_run_xts_aes_cmd(struct ccp_cmd_queue *cmd_q,
1058 struct ccp_cmd *cmd)
1059 {
1060 struct ccp_xts_aes_engine *xts = &cmd->u.xts;
1061 struct ccp_dm_workarea key, ctx;
1062 struct ccp_data src, dst;
1063 struct ccp_op op;
1064 unsigned int unit_size, dm_offset;
1065 bool in_place = false;
1066 unsigned int sb_count;
1067 enum ccp_aes_type aestype;
1068 int ret;
1069
1070 switch (xts->unit_size) {
1071 case CCP_XTS_AES_UNIT_SIZE_16:
1072 unit_size = 16;
1073 break;
1074 case CCP_XTS_AES_UNIT_SIZE_512:
1075 unit_size = 512;
1076 break;
1077 case CCP_XTS_AES_UNIT_SIZE_1024:
1078 unit_size = 1024;
1079 break;
1080 case CCP_XTS_AES_UNIT_SIZE_2048:
1081 unit_size = 2048;
1082 break;
1083 case CCP_XTS_AES_UNIT_SIZE_4096:
1084 unit_size = 4096;
1085 break;
1086
1087 default:
1088 return -EINVAL;
1089 }
1090
1091 if (xts->key_len == AES_KEYSIZE_128)
1092 aestype = CCP_AES_TYPE_128;
1093 else if (xts->key_len == AES_KEYSIZE_256)
1094 aestype = CCP_AES_TYPE_256;
1095 else
1096 return -EINVAL;
1097
1098 if (!xts->final && (xts->src_len & (AES_BLOCK_SIZE - 1)))
1099 return -EINVAL;
1100
1101 if (xts->iv_len != AES_BLOCK_SIZE)
1102 return -EINVAL;
1103
1104 if (!xts->key || !xts->iv || !xts->src || !xts->dst)
1105 return -EINVAL;
1106
1107 BUILD_BUG_ON(CCP_XTS_AES_KEY_SB_COUNT != 1);
1108 BUILD_BUG_ON(CCP_XTS_AES_CTX_SB_COUNT != 1);
1109
1110 ret = -EIO;
1111 memset(&op, 0, sizeof(op));
1112 op.cmd_q = cmd_q;
1113 op.jobid = CCP_NEW_JOBID(cmd_q->ccp);
1114 op.sb_key = cmd_q->sb_key;
1115 op.sb_ctx = cmd_q->sb_ctx;
1116 op.init = 1;
1117 op.u.xts.type = aestype;
1118 op.u.xts.action = xts->action;
1119 op.u.xts.unit_size = xts->unit_size;
1120
1121 /* A version 3 device only supports 128-bit keys, which fits into a
1122 * single SB entry. A version 5 device uses a 512-bit vector, so two
1123 * SB entries.
1124 */
1125 if (cmd_q->ccp->vdata->version == CCP_VERSION(3, 0))
1126 sb_count = CCP_XTS_AES_KEY_SB_COUNT;
1127 else
1128 sb_count = CCP5_XTS_AES_KEY_SB_COUNT;
1129 ret = ccp_init_dm_workarea(&key, cmd_q,
1130 sb_count * CCP_SB_BYTES,
1131 DMA_TO_DEVICE);
1132 if (ret)
1133 return ret;
1134
1135 if (cmd_q->ccp->vdata->version == CCP_VERSION(3, 0)) {
1136 /* All supported key sizes must be in little endian format.
1137 * Use the 256-bit byte swap passthru option to convert from
1138 * big endian to little endian.
1139 */
1140 dm_offset = CCP_SB_BYTES - AES_KEYSIZE_128;
1141 ret = ccp_set_dm_area(&key, dm_offset, xts->key, 0, xts->key_len);
1142 if (ret)
1143 goto e_key;
1144 ret = ccp_set_dm_area(&key, 0, xts->key, xts->key_len, xts->key_len);
1145 if (ret)
1146 goto e_key;
1147 } else {
1148 /* Version 5 CCPs use a 512-bit space for the key: each portion
1149 * occupies 256 bits, or one entire slot, and is zero-padded.
1150 */
1151 unsigned int pad;
1152
1153 dm_offset = CCP_SB_BYTES;
1154 pad = dm_offset - xts->key_len;
1155 ret = ccp_set_dm_area(&key, pad, xts->key, 0, xts->key_len);
1156 if (ret)
1157 goto e_key;
1158 ret = ccp_set_dm_area(&key, dm_offset + pad, xts->key,
1159 xts->key_len, xts->key_len);
1160 if (ret)
1161 goto e_key;
1162 }
1163 ret = ccp_copy_to_sb(cmd_q, &key, op.jobid, op.sb_key,
1164 CCP_PASSTHRU_BYTESWAP_256BIT);
1165 if (ret) {
1166 cmd->engine_error = cmd_q->cmd_error;
1167 goto e_key;
1168 }
1169
1170 /* The AES context fits in a single (32-byte) SB entry and
1171 * for XTS is already in little endian format so no byte swapping
1172 * is needed.
1173 */
1174 ret = ccp_init_dm_workarea(&ctx, cmd_q,
1175 CCP_XTS_AES_CTX_SB_COUNT * CCP_SB_BYTES,
1176 DMA_BIDIRECTIONAL);
1177 if (ret)
1178 goto e_key;
1179
1180 ret = ccp_set_dm_area(&ctx, 0, xts->iv, 0, xts->iv_len);
1181 if (ret)
1182 goto e_ctx;
1183 ret = ccp_copy_to_sb(cmd_q, &ctx, op.jobid, op.sb_ctx,
1184 CCP_PASSTHRU_BYTESWAP_NOOP);
1185 if (ret) {
1186 cmd->engine_error = cmd_q->cmd_error;
1187 goto e_ctx;
1188 }
1189
1190 /* Prepare the input and output data workareas. For in-place
1191 * operations we need to set the dma direction to BIDIRECTIONAL
1192 * and copy the src workarea to the dst workarea.
1193 */
1194 if (sg_virt(xts->src) == sg_virt(xts->dst))
1195 in_place = true;
1196
1197 ret = ccp_init_data(&src, cmd_q, xts->src, xts->src_len,
1198 unit_size,
1199 in_place ? DMA_BIDIRECTIONAL : DMA_TO_DEVICE);
1200 if (ret)
1201 goto e_ctx;
1202
1203 if (in_place) {
1204 dst = src;
1205 } else {
1206 ret = ccp_init_data(&dst, cmd_q, xts->dst, xts->src_len,
1207 unit_size, DMA_FROM_DEVICE);
1208 if (ret)
1209 goto e_src;
1210 }
1211
1212 /* Send data to the CCP AES engine */
1213 while (src.sg_wa.bytes_left) {
1214 ccp_prepare_data(&src, &dst, &op, unit_size, true);
1215 if (!src.sg_wa.bytes_left)
1216 op.eom = 1;
1217
1218 ret = cmd_q->ccp->vdata->perform->xts_aes(&op);
1219 if (ret) {
1220 cmd->engine_error = cmd_q->cmd_error;
1221 goto e_dst;
1222 }
1223
1224 ccp_process_data(&src, &dst, &op);
1225 }
1226
1227 /* Retrieve the AES context - convert from LE to BE using
1228 * 32-byte (256-bit) byteswapping
1229 */
1230 ret = ccp_copy_from_sb(cmd_q, &ctx, op.jobid, op.sb_ctx,
1231 CCP_PASSTHRU_BYTESWAP_256BIT);
1232 if (ret) {
1233 cmd->engine_error = cmd_q->cmd_error;
1234 goto e_dst;
1235 }
1236
1237 /* ...but we only need AES_BLOCK_SIZE bytes */
1238 dm_offset = CCP_SB_BYTES - AES_BLOCK_SIZE;
1239 ccp_get_dm_area(&ctx, dm_offset, xts->iv, 0, xts->iv_len);
1240
1241 e_dst:
1242 if (!in_place)
1243 ccp_free_data(&dst, cmd_q);
1244
1245 e_src:
1246 ccp_free_data(&src, cmd_q);
1247
1248 e_ctx:
1249 ccp_dm_free(&ctx);
1250
1251 e_key:
1252 ccp_dm_free(&key);
1253
1254 return ret;
1255 }
1256
1257 static int ccp_run_des3_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd)
1258 {
1259 struct ccp_des3_engine *des3 = &cmd->u.des3;
1260
1261 struct ccp_dm_workarea key, ctx;
1262 struct ccp_data src, dst;
1263 struct ccp_op op;
1264 unsigned int dm_offset;
1265 unsigned int len_singlekey;
1266 bool in_place = false;
1267 int ret;
1268
1269 /* Error checks */
1270 if (!cmd_q->ccp->vdata->perform->des3)
1271 return -EINVAL;
1272
1273 if (des3->key_len != DES3_EDE_KEY_SIZE)
1274 return -EINVAL;
1275
1276 if (((des3->mode == CCP_DES3_MODE_ECB) ||
1277 (des3->mode == CCP_DES3_MODE_CBC)) &&
1278 (des3->src_len & (DES3_EDE_BLOCK_SIZE - 1)))
1279 return -EINVAL;
1280
1281 if (!des3->key || !des3->src || !des3->dst)
1282 return -EINVAL;
1283
1284 if (des3->mode != CCP_DES3_MODE_ECB) {
1285 if (des3->iv_len != DES3_EDE_BLOCK_SIZE)
1286 return -EINVAL;
1287
1288 if (!des3->iv)
1289 return -EINVAL;
1290 }
1291
1292 ret = -EIO;
1293 /* Zero out all the fields of the command desc */
1294 memset(&op, 0, sizeof(op));
1295
1296 /* Set up the Function field */
1297 op.cmd_q = cmd_q;
1298 op.jobid = CCP_NEW_JOBID(cmd_q->ccp);
1299 op.sb_key = cmd_q->sb_key;
1300
1301 op.init = (des3->mode == CCP_DES3_MODE_ECB) ? 0 : 1;
1302 op.u.des3.type = des3->type;
1303 op.u.des3.mode = des3->mode;
1304 op.u.des3.action = des3->action;
1305
1306 /*
1307 * All supported key sizes fit in a single (32-byte) KSB entry and
1308 * (like AES) must be in little endian format. Use the 256-bit byte
1309 * swap passthru option to convert from big endian to little endian.
1310 */
1311 ret = ccp_init_dm_workarea(&key, cmd_q,
1312 CCP_DES3_KEY_SB_COUNT * CCP_SB_BYTES,
1313 DMA_TO_DEVICE);
1314 if (ret)
1315 return ret;
1316
1317 /*
1318 * The contents of the key triplet are in the reverse order of what
1319 * is required by the engine. Copy the 3 pieces individually to put
1320 * them where they belong.
1321 */
1322 dm_offset = CCP_SB_BYTES - des3->key_len; /* Basic offset */
1323
1324 len_singlekey = des3->key_len / 3;
1325 ret = ccp_set_dm_area(&key, dm_offset + 2 * len_singlekey,
1326 des3->key, 0, len_singlekey);
1327 if (ret)
1328 goto e_key;
1329 ret = ccp_set_dm_area(&key, dm_offset + len_singlekey,
1330 des3->key, len_singlekey, len_singlekey);
1331 if (ret)
1332 goto e_key;
1333 ret = ccp_set_dm_area(&key, dm_offset,
1334 des3->key, 2 * len_singlekey, len_singlekey);
1335 if (ret)
1336 goto e_key;
1337
1338 /* Copy the key to the SB */
1339 ret = ccp_copy_to_sb(cmd_q, &key, op.jobid, op.sb_key,
1340 CCP_PASSTHRU_BYTESWAP_256BIT);
1341 if (ret) {
1342 cmd->engine_error = cmd_q->cmd_error;
1343 goto e_key;
1344 }
1345
1346 /*
1347 * The DES3 context fits in a single (32-byte) KSB entry and
1348 * must be in little endian format. Use the 256-bit byte swap
1349 * passthru option to convert from big endian to little endian.
1350 */
1351 if (des3->mode != CCP_DES3_MODE_ECB) {
1352 u32 load_mode;
1353
1354 op.sb_ctx = cmd_q->sb_ctx;
1355
1356 ret = ccp_init_dm_workarea(&ctx, cmd_q,
1357 CCP_DES3_CTX_SB_COUNT * CCP_SB_BYTES,
1358 DMA_BIDIRECTIONAL);
1359 if (ret)
1360 goto e_key;
1361
1362 /* Load the context into the LSB */
1363 dm_offset = CCP_SB_BYTES - des3->iv_len;
1364 ret = ccp_set_dm_area(&ctx, dm_offset, des3->iv, 0,
1365 des3->iv_len);
1366 if (ret)
1367 goto e_ctx;
1368
1369 if (cmd_q->ccp->vdata->version == CCP_VERSION(3, 0))
1370 load_mode = CCP_PASSTHRU_BYTESWAP_NOOP;
1371 else
1372 load_mode = CCP_PASSTHRU_BYTESWAP_256BIT;
1373 ret = ccp_copy_to_sb(cmd_q, &ctx, op.jobid, op.sb_ctx,
1374 load_mode);
1375 if (ret) {
1376 cmd->engine_error = cmd_q->cmd_error;
1377 goto e_ctx;
1378 }
1379 }
1380
1381 /*
1382 * Prepare the input and output data workareas. For in-place
1383 * operations we need to set the dma direction to BIDIRECTIONAL
1384 * and copy the src workarea to the dst workarea.
1385 */
1386 if (sg_virt(des3->src) == sg_virt(des3->dst))
1387 in_place = true;
1388
1389 ret = ccp_init_data(&src, cmd_q, des3->src, des3->src_len,
1390 DES3_EDE_BLOCK_SIZE,
1391 in_place ? DMA_BIDIRECTIONAL : DMA_TO_DEVICE);
1392 if (ret)
1393 goto e_ctx;
1394
1395 if (in_place)
1396 dst = src;
1397 else {
1398 ret = ccp_init_data(&dst, cmd_q, des3->dst, des3->src_len,
1399 DES3_EDE_BLOCK_SIZE, DMA_FROM_DEVICE);
1400 if (ret)
1401 goto e_src;
1402 }
1403
1404 /* Send data to the CCP DES3 engine */
1405 while (src.sg_wa.bytes_left) {
1406 ccp_prepare_data(&src, &dst, &op, DES3_EDE_BLOCK_SIZE, true);
1407 if (!src.sg_wa.bytes_left) {
1408 op.eom = 1;
1409
1410 /* Since we don't retrieve the context in ECB mode
1411 * we have to wait for the operation to complete
1412 * on the last piece of data
1413 */
1414 op.soc = 0;
1415 }
1416
1417 ret = cmd_q->ccp->vdata->perform->des3(&op);
1418 if (ret) {
1419 cmd->engine_error = cmd_q->cmd_error;
1420 goto e_dst;
1421 }
1422
1423 ccp_process_data(&src, &dst, &op);
1424 }
1425
1426 if (des3->mode != CCP_DES3_MODE_ECB) {
1427 /* Retrieve the context and make BE */
1428 ret = ccp_copy_from_sb(cmd_q, &ctx, op.jobid, op.sb_ctx,
1429 CCP_PASSTHRU_BYTESWAP_256BIT);
1430 if (ret) {
1431 cmd->engine_error = cmd_q->cmd_error;
1432 goto e_dst;
1433 }
1434
1435 /* ...but we only need the last DES3_EDE_BLOCK_SIZE bytes */
1436 if (cmd_q->ccp->vdata->version == CCP_VERSION(3, 0))
1437 dm_offset = CCP_SB_BYTES - des3->iv_len;
1438 else
1439 dm_offset = 0;
1440 ccp_get_dm_area(&ctx, dm_offset, des3->iv, 0,
1441 DES3_EDE_BLOCK_SIZE);
1442 }
1443 e_dst:
1444 if (!in_place)
1445 ccp_free_data(&dst, cmd_q);
1446
1447 e_src:
1448 ccp_free_data(&src, cmd_q);
1449
1450 e_ctx:
1451 if (des3->mode != CCP_DES3_MODE_ECB)
1452 ccp_dm_free(&ctx);
1453
1454 e_key:
1455 ccp_dm_free(&key);
1456
1457 return ret;
1458 }
1459
1460 static int ccp_run_sha_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd)
1461 {
1462 struct ccp_sha_engine *sha = &cmd->u.sha;
1463 struct ccp_dm_workarea ctx;
1464 struct ccp_data src;
1465 struct ccp_op op;
1466 unsigned int ioffset, ooffset;
1467 unsigned int digest_size;
1468 int sb_count;
1469 const void *init;
1470 u64 block_size;
1471 int ctx_size;
1472 int ret;
1473
1474 switch (sha->type) {
1475 case CCP_SHA_TYPE_1:
1476 if (sha->ctx_len < SHA1_DIGEST_SIZE)
1477 return -EINVAL;
1478 block_size = SHA1_BLOCK_SIZE;
1479 break;
1480 case CCP_SHA_TYPE_224:
1481 if (sha->ctx_len < SHA224_DIGEST_SIZE)
1482 return -EINVAL;
1483 block_size = SHA224_BLOCK_SIZE;
1484 break;
1485 case CCP_SHA_TYPE_256:
1486 if (sha->ctx_len < SHA256_DIGEST_SIZE)
1487 return -EINVAL;
1488 block_size = SHA256_BLOCK_SIZE;
1489 break;
1490 case CCP_SHA_TYPE_384:
1491 if (cmd_q->ccp->vdata->version < CCP_VERSION(4, 0)
1492 || sha->ctx_len < SHA384_DIGEST_SIZE)
1493 return -EINVAL;
1494 block_size = SHA384_BLOCK_SIZE;
1495 break;
1496 case CCP_SHA_TYPE_512:
1497 if (cmd_q->ccp->vdata->version < CCP_VERSION(4, 0)
1498 || sha->ctx_len < SHA512_DIGEST_SIZE)
1499 return -EINVAL;
1500 block_size = SHA512_BLOCK_SIZE;
1501 break;
1502 default:
1503 return -EINVAL;
1504 }
1505
1506 if (!sha->ctx)
1507 return -EINVAL;
1508
1509 if (!sha->final && (sha->src_len & (block_size - 1)))
1510 return -EINVAL;
1511
1512 /* The version 3 device can't handle zero-length input */
1513 if (cmd_q->ccp->vdata->version == CCP_VERSION(3, 0)) {
1514
1515 if (!sha->src_len) {
1516 unsigned int digest_len;
1517 const u8 *sha_zero;
1518
1519 /* Not final, just return */
1520 if (!sha->final)
1521 return 0;
1522
1523 /* CCP can't do a zero length sha operation so the
1524 * caller must buffer the data.
1525 */
1526 if (sha->msg_bits)
1527 return -EINVAL;
1528
1529 /* The CCP cannot perform zero-length sha operations
1530 * so the caller is required to buffer data for the
1531 * final operation. However, a sha operation for a
1532 * message with a total length of zero is valid so
1533 * known values are required to supply the result.
1534 */
1535 switch (sha->type) {
1536 case CCP_SHA_TYPE_1:
1537 sha_zero = sha1_zero_message_hash;
1538 digest_len = SHA1_DIGEST_SIZE;
1539 break;
1540 case CCP_SHA_TYPE_224:
1541 sha_zero = sha224_zero_message_hash;
1542 digest_len = SHA224_DIGEST_SIZE;
1543 break;
1544 case CCP_SHA_TYPE_256:
1545 sha_zero = sha256_zero_message_hash;
1546 digest_len = SHA256_DIGEST_SIZE;
1547 break;
1548 default:
1549 return -EINVAL;
1550 }
1551
1552 scatterwalk_map_and_copy((void *)sha_zero, sha->ctx, 0,
1553 digest_len, 1);
1554
1555 return 0;
1556 }
1557 }
1558
1559 /* Set variables used throughout */
1560 switch (sha->type) {
1561 case CCP_SHA_TYPE_1:
1562 digest_size = SHA1_DIGEST_SIZE;
1563 init = (void *) ccp_sha1_init;
1564 ctx_size = SHA1_DIGEST_SIZE;
1565 sb_count = 1;
1566 if (cmd_q->ccp->vdata->version != CCP_VERSION(3, 0))
1567 ooffset = ioffset = CCP_SB_BYTES - SHA1_DIGEST_SIZE;
1568 else
1569 ooffset = ioffset = 0;
1570 break;
1571 case CCP_SHA_TYPE_224:
1572 digest_size = SHA224_DIGEST_SIZE;
1573 init = (void *) ccp_sha224_init;
1574 ctx_size = SHA256_DIGEST_SIZE;
1575 sb_count = 1;
1576 ioffset = 0;
1577 if (cmd_q->ccp->vdata->version != CCP_VERSION(3, 0))
1578 ooffset = CCP_SB_BYTES - SHA224_DIGEST_SIZE;
1579 else
1580 ooffset = 0;
1581 break;
1582 case CCP_SHA_TYPE_256:
1583 digest_size = SHA256_DIGEST_SIZE;
1584 init = (void *) ccp_sha256_init;
1585 ctx_size = SHA256_DIGEST_SIZE;
1586 sb_count = 1;
1587 ooffset = ioffset = 0;
1588 break;
1589 case CCP_SHA_TYPE_384:
1590 digest_size = SHA384_DIGEST_SIZE;
1591 init = (void *) ccp_sha384_init;
1592 ctx_size = SHA512_DIGEST_SIZE;
1593 sb_count = 2;
1594 ioffset = 0;
1595 ooffset = 2 * CCP_SB_BYTES - SHA384_DIGEST_SIZE;
1596 break;
1597 case CCP_SHA_TYPE_512:
1598 digest_size = SHA512_DIGEST_SIZE;
1599 init = (void *) ccp_sha512_init;
1600 ctx_size = SHA512_DIGEST_SIZE;
1601 sb_count = 2;
1602 ooffset = ioffset = 0;
1603 break;
1604 default:
1605 ret = -EINVAL;
1606 goto e_data;
1607 }
1608
1609 /* For zero-length plaintext the src pointer is ignored;
1610 * otherwise both parts must be valid
1611 */
1612 if (sha->src_len && !sha->src)
1613 return -EINVAL;
1614
1615 memset(&op, 0, sizeof(op));
1616 op.cmd_q = cmd_q;
1617 op.jobid = CCP_NEW_JOBID(cmd_q->ccp);
1618 op.sb_ctx = cmd_q->sb_ctx; /* Pre-allocated */
1619 op.u.sha.type = sha->type;
1620 op.u.sha.msg_bits = sha->msg_bits;
1621
1622 /* For SHA1/224/256 the context fits in a single (32-byte) SB entry;
1623 * SHA384/512 require 2 adjacent SB slots, with the right half in the
1624 * first slot, and the left half in the second. Each portion must then
1625 * be in little endian format: use the 256-bit byte swap option.
1626 */
1627 ret = ccp_init_dm_workarea(&ctx, cmd_q, sb_count * CCP_SB_BYTES,
1628 DMA_BIDIRECTIONAL);
1629 if (ret)
1630 return ret;
1631 if (sha->first) {
1632 switch (sha->type) {
1633 case CCP_SHA_TYPE_1:
1634 case CCP_SHA_TYPE_224:
1635 case CCP_SHA_TYPE_256:
1636 memcpy(ctx.address + ioffset, init, ctx_size);
1637 break;
1638 case CCP_SHA_TYPE_384:
1639 case CCP_SHA_TYPE_512:
1640 memcpy(ctx.address + ctx_size / 2, init,
1641 ctx_size / 2);
1642 memcpy(ctx.address, init + ctx_size / 2,
1643 ctx_size / 2);
1644 break;
1645 default:
1646 ret = -EINVAL;
1647 goto e_ctx;
1648 }
1649 } else {
1650 /* Restore the context */
1651 ret = ccp_set_dm_area(&ctx, 0, sha->ctx, 0,
1652 sb_count * CCP_SB_BYTES);
1653 if (ret)
1654 goto e_ctx;
1655 }
1656
1657 ret = ccp_copy_to_sb(cmd_q, &ctx, op.jobid, op.sb_ctx,
1658 CCP_PASSTHRU_BYTESWAP_256BIT);
1659 if (ret) {
1660 cmd->engine_error = cmd_q->cmd_error;
1661 goto e_ctx;
1662 }
1663
1664 if (sha->src) {
1665 /* Send data to the CCP SHA engine; block_size is set above */
1666 ret = ccp_init_data(&src, cmd_q, sha->src, sha->src_len,
1667 block_size, DMA_TO_DEVICE);
1668 if (ret)
1669 goto e_ctx;
1670
1671 while (src.sg_wa.bytes_left) {
1672 ccp_prepare_data(&src, NULL, &op, block_size, false);
1673 if (sha->final && !src.sg_wa.bytes_left)
1674 op.eom = 1;
1675
1676 ret = cmd_q->ccp->vdata->perform->sha(&op);
1677 if (ret) {
1678 cmd->engine_error = cmd_q->cmd_error;
1679 goto e_data;
1680 }
1681
1682 ccp_process_data(&src, NULL, &op);
1683 }
1684 } else {
1685 op.eom = 1;
1686 ret = cmd_q->ccp->vdata->perform->sha(&op);
1687 if (ret) {
1688 cmd->engine_error = cmd_q->cmd_error;
1689 goto e_data;
1690 }
1691 }
1692
1693 /* Retrieve the SHA context - convert from LE to BE using
1694 * 32-byte (256-bit) byteswapping to BE
1695 */
1696 ret = ccp_copy_from_sb(cmd_q, &ctx, op.jobid, op.sb_ctx,
1697 CCP_PASSTHRU_BYTESWAP_256BIT);
1698 if (ret) {
1699 cmd->engine_error = cmd_q->cmd_error;
1700 goto e_data;
1701 }
1702
1703 if (sha->final) {
1704 /* Finishing up, so get the digest */
1705 switch (sha->type) {
1706 case CCP_SHA_TYPE_1:
1707 case CCP_SHA_TYPE_224:
1708 case CCP_SHA_TYPE_256:
1709 ccp_get_dm_area(&ctx, ooffset,
1710 sha->ctx, 0,
1711 digest_size);
1712 break;
1713 case CCP_SHA_TYPE_384:
1714 case CCP_SHA_TYPE_512:
1715 ccp_get_dm_area(&ctx, 0,
1716 sha->ctx, LSB_ITEM_SIZE - ooffset,
1717 LSB_ITEM_SIZE);
1718 ccp_get_dm_area(&ctx, LSB_ITEM_SIZE + ooffset,
1719 sha->ctx, 0,
1720 LSB_ITEM_SIZE - ooffset);
1721 break;
1722 default:
1723 ret = -EINVAL;
1724 goto e_ctx;
1725 }
1726 } else {
1727 /* Stash the context */
1728 ccp_get_dm_area(&ctx, 0, sha->ctx, 0,
1729 sb_count * CCP_SB_BYTES);
1730 }
1731
1732 if (sha->final && sha->opad) {
1733 /* HMAC operation, recursively perform final SHA */
1734 struct ccp_cmd hmac_cmd;
1735 struct scatterlist sg;
1736 u8 *hmac_buf;
1737
1738 if (sha->opad_len != block_size) {
1739 ret = -EINVAL;
1740 goto e_data;
1741 }
1742
1743 hmac_buf = kmalloc(block_size + digest_size, GFP_KERNEL);
1744 if (!hmac_buf) {
1745 ret = -ENOMEM;
1746 goto e_data;
1747 }
1748 sg_init_one(&sg, hmac_buf, block_size + digest_size);
1749
1750 scatterwalk_map_and_copy(hmac_buf, sha->opad, 0, block_size, 0);
1751 switch (sha->type) {
1752 case CCP_SHA_TYPE_1:
1753 case CCP_SHA_TYPE_224:
1754 case CCP_SHA_TYPE_256:
1755 memcpy(hmac_buf + block_size,
1756 ctx.address + ooffset,
1757 digest_size);
1758 break;
1759 case CCP_SHA_TYPE_384:
1760 case CCP_SHA_TYPE_512:
1761 memcpy(hmac_buf + block_size,
1762 ctx.address + LSB_ITEM_SIZE + ooffset,
1763 LSB_ITEM_SIZE);
1764 memcpy(hmac_buf + block_size +
1765 (LSB_ITEM_SIZE - ooffset),
1766 ctx.address,
1767 LSB_ITEM_SIZE);
1768 break;
1769 default:
1770 ret = -EINVAL;
1771 goto e_ctx;
1772 }
1773
1774 memset(&hmac_cmd, 0, sizeof(hmac_cmd));
1775 hmac_cmd.engine = CCP_ENGINE_SHA;
1776 hmac_cmd.u.sha.type = sha->type;
1777 hmac_cmd.u.sha.ctx = sha->ctx;
1778 hmac_cmd.u.sha.ctx_len = sha->ctx_len;
1779 hmac_cmd.u.sha.src = &sg;
1780 hmac_cmd.u.sha.src_len = block_size + digest_size;
1781 hmac_cmd.u.sha.opad = NULL;
1782 hmac_cmd.u.sha.opad_len = 0;
1783 hmac_cmd.u.sha.first = 1;
1784 hmac_cmd.u.sha.final = 1;
1785 hmac_cmd.u.sha.msg_bits = (block_size + digest_size) << 3;
1786
1787 ret = ccp_run_sha_cmd(cmd_q, &hmac_cmd);
1788 if (ret)
1789 cmd->engine_error = hmac_cmd.engine_error;
1790
1791 kfree(hmac_buf);
1792 }
1793
1794 e_data:
1795 if (sha->src)
1796 ccp_free_data(&src, cmd_q);
1797
1798 e_ctx:
1799 ccp_dm_free(&ctx);
1800
1801 return ret;
1802 }
1803
1804 static int ccp_run_rsa_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd)
1805 {
1806 struct ccp_rsa_engine *rsa = &cmd->u.rsa;
1807 struct ccp_dm_workarea exp, src, dst;
1808 struct ccp_op op;
1809 unsigned int sb_count, i_len, o_len;
1810 int ret;
1811
1812 /* Check against the maximum allowable size, in bits */
1813 if (rsa->key_size > cmd_q->ccp->vdata->rsamax)
1814 return -EINVAL;
1815
1816 if (!rsa->exp || !rsa->mod || !rsa->src || !rsa->dst)
1817 return -EINVAL;
1818
1819 memset(&op, 0, sizeof(op));
1820 op.cmd_q = cmd_q;
1821 op.jobid = CCP_NEW_JOBID(cmd_q->ccp);
1822
1823 /* The RSA modulus must precede the message being acted upon, so
1824 * it must be copied to a DMA area where the message and the
1825 * modulus can be concatenated. Therefore the input buffer
1826 * length required is twice the output buffer length (which
1827 * must be a multiple of 256-bits). Compute o_len, i_len in bytes.
1828 * Buffer sizes must be a multiple of 32 bytes; rounding up may be
1829 * required.
1830 */
1831 o_len = 32 * ((rsa->key_size + 255) / 256);
1832 i_len = o_len * 2;
1833
1834 sb_count = 0;
1835 if (cmd_q->ccp->vdata->version < CCP_VERSION(5, 0)) {
1836 /* sb_count is the number of storage block slots required
1837 * for the modulus.
1838 */
1839 sb_count = o_len / CCP_SB_BYTES;
1840 op.sb_key = cmd_q->ccp->vdata->perform->sballoc(cmd_q,
1841 sb_count);
1842 if (!op.sb_key)
1843 return -EIO;
1844 } else {
1845 /* A version 5 device allows a modulus size that will not fit
1846 * in the LSB, so the command will transfer it from memory.
1847 * Set the sb key to the default, even though it's not used.
1848 */
1849 op.sb_key = cmd_q->sb_key;
1850 }
1851
1852 /* The RSA exponent must be in little endian format. Reverse its
1853 * byte order.
1854 */
1855 ret = ccp_init_dm_workarea(&exp, cmd_q, o_len, DMA_TO_DEVICE);
1856 if (ret)
1857 goto e_sb;
1858
1859 ret = ccp_reverse_set_dm_area(&exp, 0, rsa->exp, 0, rsa->exp_len);
1860 if (ret)
1861 goto e_exp;
1862
1863 if (cmd_q->ccp->vdata->version < CCP_VERSION(5, 0)) {
1864 /* Copy the exponent to the local storage block, using
1865 * as many 32-byte blocks as were allocated above. It's
1866 * already little endian, so no further change is required.
1867 */
1868 ret = ccp_copy_to_sb(cmd_q, &exp, op.jobid, op.sb_key,
1869 CCP_PASSTHRU_BYTESWAP_NOOP);
1870 if (ret) {
1871 cmd->engine_error = cmd_q->cmd_error;
1872 goto e_exp;
1873 }
1874 } else {
1875 /* The exponent can be retrieved from memory via DMA. */
1876 op.exp.u.dma.address = exp.dma.address;
1877 op.exp.u.dma.offset = 0;
1878 }
1879
1880 /* Concatenate the modulus and the message. Both the modulus and
1881 * the operands must be in little endian format. Since the input
1882 * is in big endian format it must be converted.
1883 */
1884 ret = ccp_init_dm_workarea(&src, cmd_q, i_len, DMA_TO_DEVICE);
1885 if (ret)
1886 goto e_exp;
1887
1888 ret = ccp_reverse_set_dm_area(&src, 0, rsa->mod, 0, rsa->mod_len);
1889 if (ret)
1890 goto e_src;
1891 ret = ccp_reverse_set_dm_area(&src, o_len, rsa->src, 0, rsa->src_len);
1892 if (ret)
1893 goto e_src;
1894
1895 /* Prepare the output area for the operation */
1896 ret = ccp_init_dm_workarea(&dst, cmd_q, o_len, DMA_FROM_DEVICE);
1897 if (ret)
1898 goto e_src;
1899
1900 op.soc = 1;
1901 op.src.u.dma.address = src.dma.address;
1902 op.src.u.dma.offset = 0;
1903 op.src.u.dma.length = i_len;
1904 op.dst.u.dma.address = dst.dma.address;
1905 op.dst.u.dma.offset = 0;
1906 op.dst.u.dma.length = o_len;
1907
1908 op.u.rsa.mod_size = rsa->key_size;
1909 op.u.rsa.input_len = i_len;
1910
1911 ret = cmd_q->ccp->vdata->perform->rsa(&op);
1912 if (ret) {
1913 cmd->engine_error = cmd_q->cmd_error;
1914 goto e_dst;
1915 }
1916
1917 ccp_reverse_get_dm_area(&dst, 0, rsa->dst, 0, rsa->mod_len);
1918
1919 e_dst:
1920 ccp_dm_free(&dst);
1921
1922 e_src:
1923 ccp_dm_free(&src);
1924
1925 e_exp:
1926 ccp_dm_free(&exp);
1927
1928 e_sb:
1929 if (sb_count)
1930 cmd_q->ccp->vdata->perform->sbfree(cmd_q, op.sb_key, sb_count);
1931
1932 return ret;
1933 }
1934
1935 static int ccp_run_passthru_cmd(struct ccp_cmd_queue *cmd_q,
1936 struct ccp_cmd *cmd)
1937 {
1938 struct ccp_passthru_engine *pt = &cmd->u.passthru;
1939 struct ccp_dm_workarea mask;
1940 struct ccp_data src, dst;
1941 struct ccp_op op;
1942 bool in_place = false;
1943 unsigned int i;
1944 int ret = 0;
1945
1946 if (!pt->final && (pt->src_len & (CCP_PASSTHRU_BLOCKSIZE - 1)))
1947 return -EINVAL;
1948
1949 if (!pt->src || !pt->dst)
1950 return -EINVAL;
1951
1952 if (pt->bit_mod != CCP_PASSTHRU_BITWISE_NOOP) {
1953 if (pt->mask_len != CCP_PASSTHRU_MASKSIZE)
1954 return -EINVAL;
1955 if (!pt->mask)
1956 return -EINVAL;
1957 }
1958
1959 BUILD_BUG_ON(CCP_PASSTHRU_SB_COUNT != 1);
1960
1961 memset(&op, 0, sizeof(op));
1962 op.cmd_q = cmd_q;
1963 op.jobid = CCP_NEW_JOBID(cmd_q->ccp);
1964
1965 if (pt->bit_mod != CCP_PASSTHRU_BITWISE_NOOP) {
1966 /* Load the mask */
1967 op.sb_key = cmd_q->sb_key;
1968
1969 ret = ccp_init_dm_workarea(&mask, cmd_q,
1970 CCP_PASSTHRU_SB_COUNT *
1971 CCP_SB_BYTES,
1972 DMA_TO_DEVICE);
1973 if (ret)
1974 return ret;
1975
1976 ret = ccp_set_dm_area(&mask, 0, pt->mask, 0, pt->mask_len);
1977 if (ret)
1978 goto e_mask;
1979 ret = ccp_copy_to_sb(cmd_q, &mask, op.jobid, op.sb_key,
1980 CCP_PASSTHRU_BYTESWAP_NOOP);
1981 if (ret) {
1982 cmd->engine_error = cmd_q->cmd_error;
1983 goto e_mask;
1984 }
1985 }
1986
1987 /* Prepare the input and output data workareas. For in-place
1988 * operations we need to set the dma direction to BIDIRECTIONAL
1989 * and copy the src workarea to the dst workarea.
1990 */
1991 if (sg_virt(pt->src) == sg_virt(pt->dst))
1992 in_place = true;
1993
1994 ret = ccp_init_data(&src, cmd_q, pt->src, pt->src_len,
1995 CCP_PASSTHRU_MASKSIZE,
1996 in_place ? DMA_BIDIRECTIONAL : DMA_TO_DEVICE);
1997 if (ret)
1998 goto e_mask;
1999
2000 if (in_place) {
2001 dst = src;
2002 } else {
2003 ret = ccp_init_data(&dst, cmd_q, pt->dst, pt->src_len,
2004 CCP_PASSTHRU_MASKSIZE, DMA_FROM_DEVICE);
2005 if (ret)
2006 goto e_src;
2007 }
2008
2009 /* Send data to the CCP Passthru engine
2010 * Because the CCP engine works on a single source and destination
2011 * dma address at a time, each entry in the source scatterlist
2012 * (after the dma_map_sg call) must be less than or equal to the
2013 * (remaining) length in the destination scatterlist entry and the
2014 * length must be a multiple of CCP_PASSTHRU_BLOCKSIZE
2015 */
2016 dst.sg_wa.sg_used = 0;
2017 for (i = 1; i <= src.sg_wa.dma_count; i++) {
2018 if (!dst.sg_wa.sg ||
2019 (dst.sg_wa.sg->length < src.sg_wa.sg->length)) {
2020 ret = -EINVAL;
2021 goto e_dst;
2022 }
2023
2024 if (i == src.sg_wa.dma_count) {
2025 op.eom = 1;
2026 op.soc = 1;
2027 }
2028
2029 op.src.type = CCP_MEMTYPE_SYSTEM;
2030 op.src.u.dma.address = sg_dma_address(src.sg_wa.sg);
2031 op.src.u.dma.offset = 0;
2032 op.src.u.dma.length = sg_dma_len(src.sg_wa.sg);
2033
2034 op.dst.type = CCP_MEMTYPE_SYSTEM;
2035 op.dst.u.dma.address = sg_dma_address(dst.sg_wa.sg);
2036 op.dst.u.dma.offset = dst.sg_wa.sg_used;
2037 op.dst.u.dma.length = op.src.u.dma.length;
2038
2039 ret = cmd_q->ccp->vdata->perform->passthru(&op);
2040 if (ret) {
2041 cmd->engine_error = cmd_q->cmd_error;
2042 goto e_dst;
2043 }
2044
2045 dst.sg_wa.sg_used += src.sg_wa.sg->length;
2046 if (dst.sg_wa.sg_used == dst.sg_wa.sg->length) {
2047 dst.sg_wa.sg = sg_next(dst.sg_wa.sg);
2048 dst.sg_wa.sg_used = 0;
2049 }
2050 src.sg_wa.sg = sg_next(src.sg_wa.sg);
2051 }
2052
2053 e_dst:
2054 if (!in_place)
2055 ccp_free_data(&dst, cmd_q);
2056
2057 e_src:
2058 ccp_free_data(&src, cmd_q);
2059
2060 e_mask:
2061 if (pt->bit_mod != CCP_PASSTHRU_BITWISE_NOOP)
2062 ccp_dm_free(&mask);
2063
2064 return ret;
2065 }
2066
2067 static int ccp_run_passthru_nomap_cmd(struct ccp_cmd_queue *cmd_q,
2068 struct ccp_cmd *cmd)
2069 {
2070 struct ccp_passthru_nomap_engine *pt = &cmd->u.passthru_nomap;
2071 struct ccp_dm_workarea mask;
2072 struct ccp_op op;
2073 int ret;
2074
2075 if (!pt->final && (pt->src_len & (CCP_PASSTHRU_BLOCKSIZE - 1)))
2076 return -EINVAL;
2077
2078 if (!pt->src_dma || !pt->dst_dma)
2079 return -EINVAL;
2080
2081 if (pt->bit_mod != CCP_PASSTHRU_BITWISE_NOOP) {
2082 if (pt->mask_len != CCP_PASSTHRU_MASKSIZE)
2083 return -EINVAL;
2084 if (!pt->mask)
2085 return -EINVAL;
2086 }
2087
2088 BUILD_BUG_ON(CCP_PASSTHRU_SB_COUNT != 1);
2089
2090 memset(&op, 0, sizeof(op));
2091 op.cmd_q = cmd_q;
2092 op.jobid = CCP_NEW_JOBID(cmd_q->ccp);
2093
2094 if (pt->bit_mod != CCP_PASSTHRU_BITWISE_NOOP) {
2095 /* Load the mask */
2096 op.sb_key = cmd_q->sb_key;
2097
2098 mask.length = pt->mask_len;
2099 mask.dma.address = pt->mask;
2100 mask.dma.length = pt->mask_len;
2101
2102 ret = ccp_copy_to_sb(cmd_q, &mask, op.jobid, op.sb_key,
2103 CCP_PASSTHRU_BYTESWAP_NOOP);
2104 if (ret) {
2105 cmd->engine_error = cmd_q->cmd_error;
2106 return ret;
2107 }
2108 }
2109
2110 /* Send data to the CCP Passthru engine */
2111 op.eom = 1;
2112 op.soc = 1;
2113
2114 op.src.type = CCP_MEMTYPE_SYSTEM;
2115 op.src.u.dma.address = pt->src_dma;
2116 op.src.u.dma.offset = 0;
2117 op.src.u.dma.length = pt->src_len;
2118
2119 op.dst.type = CCP_MEMTYPE_SYSTEM;
2120 op.dst.u.dma.address = pt->dst_dma;
2121 op.dst.u.dma.offset = 0;
2122 op.dst.u.dma.length = pt->src_len;
2123
2124 ret = cmd_q->ccp->vdata->perform->passthru(&op);
2125 if (ret)
2126 cmd->engine_error = cmd_q->cmd_error;
2127
2128 return ret;
2129 }
2130
2131 static int ccp_run_ecc_mm_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd)
2132 {
2133 struct ccp_ecc_engine *ecc = &cmd->u.ecc;
2134 struct ccp_dm_workarea src, dst;
2135 struct ccp_op op;
2136 int ret;
2137 u8 *save;
2138
2139 if (!ecc->u.mm.operand_1 ||
2140 (ecc->u.mm.operand_1_len > CCP_ECC_MODULUS_BYTES))
2141 return -EINVAL;
2142
2143 if (ecc->function != CCP_ECC_FUNCTION_MINV_384BIT)
2144 if (!ecc->u.mm.operand_2 ||
2145 (ecc->u.mm.operand_2_len > CCP_ECC_MODULUS_BYTES))
2146 return -EINVAL;
2147
2148 if (!ecc->u.mm.result ||
2149 (ecc->u.mm.result_len < CCP_ECC_MODULUS_BYTES))
2150 return -EINVAL;
2151
2152 memset(&op, 0, sizeof(op));
2153 op.cmd_q = cmd_q;
2154 op.jobid = CCP_NEW_JOBID(cmd_q->ccp);
2155
2156 /* Concatenate the modulus and the operands. Both the modulus and
2157 * the operands must be in little endian format. Since the input
2158 * is in big endian format it must be converted and placed in a
2159 * fixed length buffer.
2160 */
2161 ret = ccp_init_dm_workarea(&src, cmd_q, CCP_ECC_SRC_BUF_SIZE,
2162 DMA_TO_DEVICE);
2163 if (ret)
2164 return ret;
2165
2166 /* Save the workarea address since it is updated in order to perform
2167 * the concatenation
2168 */
2169 save = src.address;
2170
2171 /* Copy the ECC modulus */
2172 ret = ccp_reverse_set_dm_area(&src, 0, ecc->mod, 0, ecc->mod_len);
2173 if (ret)
2174 goto e_src;
2175 src.address += CCP_ECC_OPERAND_SIZE;
2176
2177 /* Copy the first operand */
2178 ret = ccp_reverse_set_dm_area(&src, 0, ecc->u.mm.operand_1, 0,
2179 ecc->u.mm.operand_1_len);
2180 if (ret)
2181 goto e_src;
2182 src.address += CCP_ECC_OPERAND_SIZE;
2183
2184 if (ecc->function != CCP_ECC_FUNCTION_MINV_384BIT) {
2185 /* Copy the second operand */
2186 ret = ccp_reverse_set_dm_area(&src, 0, ecc->u.mm.operand_2, 0,
2187 ecc->u.mm.operand_2_len);
2188 if (ret)
2189 goto e_src;
2190 src.address += CCP_ECC_OPERAND_SIZE;
2191 }
2192
2193 /* Restore the workarea address */
2194 src.address = save;
2195
2196 /* Prepare the output area for the operation */
2197 ret = ccp_init_dm_workarea(&dst, cmd_q, CCP_ECC_DST_BUF_SIZE,
2198 DMA_FROM_DEVICE);
2199 if (ret)
2200 goto e_src;
2201
2202 op.soc = 1;
2203 op.src.u.dma.address = src.dma.address;
2204 op.src.u.dma.offset = 0;
2205 op.src.u.dma.length = src.length;
2206 op.dst.u.dma.address = dst.dma.address;
2207 op.dst.u.dma.offset = 0;
2208 op.dst.u.dma.length = dst.length;
2209
2210 op.u.ecc.function = cmd->u.ecc.function;
2211
2212 ret = cmd_q->ccp->vdata->perform->ecc(&op);
2213 if (ret) {
2214 cmd->engine_error = cmd_q->cmd_error;
2215 goto e_dst;
2216 }
2217
2218 ecc->ecc_result = le16_to_cpup(
2219 (const __le16 *)(dst.address + CCP_ECC_RESULT_OFFSET));
2220 if (!(ecc->ecc_result & CCP_ECC_RESULT_SUCCESS)) {
2221 ret = -EIO;
2222 goto e_dst;
2223 }
2224
2225 /* Save the ECC result */
2226 ccp_reverse_get_dm_area(&dst, 0, ecc->u.mm.result, 0,
2227 CCP_ECC_MODULUS_BYTES);
2228
2229 e_dst:
2230 ccp_dm_free(&dst);
2231
2232 e_src:
2233 ccp_dm_free(&src);
2234
2235 return ret;
2236 }
2237
2238 static int ccp_run_ecc_pm_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd)
2239 {
2240 struct ccp_ecc_engine *ecc = &cmd->u.ecc;
2241 struct ccp_dm_workarea src, dst;
2242 struct ccp_op op;
2243 int ret;
2244 u8 *save;
2245
2246 if (!ecc->u.pm.point_1.x ||
2247 (ecc->u.pm.point_1.x_len > CCP_ECC_MODULUS_BYTES) ||
2248 !ecc->u.pm.point_1.y ||
2249 (ecc->u.pm.point_1.y_len > CCP_ECC_MODULUS_BYTES))
2250 return -EINVAL;
2251
2252 if (ecc->function == CCP_ECC_FUNCTION_PADD_384BIT) {
2253 if (!ecc->u.pm.point_2.x ||
2254 (ecc->u.pm.point_2.x_len > CCP_ECC_MODULUS_BYTES) ||
2255 !ecc->u.pm.point_2.y ||
2256 (ecc->u.pm.point_2.y_len > CCP_ECC_MODULUS_BYTES))
2257 return -EINVAL;
2258 } else {
2259 if (!ecc->u.pm.domain_a ||
2260 (ecc->u.pm.domain_a_len > CCP_ECC_MODULUS_BYTES))
2261 return -EINVAL;
2262
2263 if (ecc->function == CCP_ECC_FUNCTION_PMUL_384BIT)
2264 if (!ecc->u.pm.scalar ||
2265 (ecc->u.pm.scalar_len > CCP_ECC_MODULUS_BYTES))
2266 return -EINVAL;
2267 }
2268
2269 if (!ecc->u.pm.result.x ||
2270 (ecc->u.pm.result.x_len < CCP_ECC_MODULUS_BYTES) ||
2271 !ecc->u.pm.result.y ||
2272 (ecc->u.pm.result.y_len < CCP_ECC_MODULUS_BYTES))
2273 return -EINVAL;
2274
2275 memset(&op, 0, sizeof(op));
2276 op.cmd_q = cmd_q;
2277 op.jobid = CCP_NEW_JOBID(cmd_q->ccp);
2278
2279 /* Concatenate the modulus and the operands. Both the modulus and
2280 * the operands must be in little endian format. Since the input
2281 * is in big endian format it must be converted and placed in a
2282 * fixed length buffer.
2283 */
2284 ret = ccp_init_dm_workarea(&src, cmd_q, CCP_ECC_SRC_BUF_SIZE,
2285 DMA_TO_DEVICE);
2286 if (ret)
2287 return ret;
2288
2289 /* Save the workarea address since it is updated in order to perform
2290 * the concatenation
2291 */
2292 save = src.address;
2293
2294 /* Copy the ECC modulus */
2295 ret = ccp_reverse_set_dm_area(&src, 0, ecc->mod, 0, ecc->mod_len);
2296 if (ret)
2297 goto e_src;
2298 src.address += CCP_ECC_OPERAND_SIZE;
2299
2300 /* Copy the first point X and Y coordinate */
2301 ret = ccp_reverse_set_dm_area(&src, 0, ecc->u.pm.point_1.x, 0,
2302 ecc->u.pm.point_1.x_len);
2303 if (ret)
2304 goto e_src;
2305 src.address += CCP_ECC_OPERAND_SIZE;
2306 ret = ccp_reverse_set_dm_area(&src, 0, ecc->u.pm.point_1.y, 0,
2307 ecc->u.pm.point_1.y_len);
2308 if (ret)
2309 goto e_src;
2310 src.address += CCP_ECC_OPERAND_SIZE;
2311
2312 /* Set the first point Z coordinate to 1 */
2313 *src.address = 0x01;
2314 src.address += CCP_ECC_OPERAND_SIZE;
2315
2316 if (ecc->function == CCP_ECC_FUNCTION_PADD_384BIT) {
2317 /* Copy the second point X and Y coordinate */
2318 ret = ccp_reverse_set_dm_area(&src, 0, ecc->u.pm.point_2.x, 0,
2319 ecc->u.pm.point_2.x_len);
2320 if (ret)
2321 goto e_src;
2322 src.address += CCP_ECC_OPERAND_SIZE;
2323 ret = ccp_reverse_set_dm_area(&src, 0, ecc->u.pm.point_2.y, 0,
2324 ecc->u.pm.point_2.y_len);
2325 if (ret)
2326 goto e_src;
2327 src.address += CCP_ECC_OPERAND_SIZE;
2328
2329 /* Set the second point Z coordinate to 1 */
2330 *src.address = 0x01;
2331 src.address += CCP_ECC_OPERAND_SIZE;
2332 } else {
2333 /* Copy the Domain "a" parameter */
2334 ret = ccp_reverse_set_dm_area(&src, 0, ecc->u.pm.domain_a, 0,
2335 ecc->u.pm.domain_a_len);
2336 if (ret)
2337 goto e_src;
2338 src.address += CCP_ECC_OPERAND_SIZE;
2339
2340 if (ecc->function == CCP_ECC_FUNCTION_PMUL_384BIT) {
2341 /* Copy the scalar value */
2342 ret = ccp_reverse_set_dm_area(&src, 0,
2343 ecc->u.pm.scalar, 0,
2344 ecc->u.pm.scalar_len);
2345 if (ret)
2346 goto e_src;
2347 src.address += CCP_ECC_OPERAND_SIZE;
2348 }
2349 }
2350
2351 /* Restore the workarea address */
2352 src.address = save;
2353
2354 /* Prepare the output area for the operation */
2355 ret = ccp_init_dm_workarea(&dst, cmd_q, CCP_ECC_DST_BUF_SIZE,
2356 DMA_FROM_DEVICE);
2357 if (ret)
2358 goto e_src;
2359
2360 op.soc = 1;
2361 op.src.u.dma.address = src.dma.address;
2362 op.src.u.dma.offset = 0;
2363 op.src.u.dma.length = src.length;
2364 op.dst.u.dma.address = dst.dma.address;
2365 op.dst.u.dma.offset = 0;
2366 op.dst.u.dma.length = dst.length;
2367
2368 op.u.ecc.function = cmd->u.ecc.function;
2369
2370 ret = cmd_q->ccp->vdata->perform->ecc(&op);
2371 if (ret) {
2372 cmd->engine_error = cmd_q->cmd_error;
2373 goto e_dst;
2374 }
2375
2376 ecc->ecc_result = le16_to_cpup(
2377 (const __le16 *)(dst.address + CCP_ECC_RESULT_OFFSET));
2378 if (!(ecc->ecc_result & CCP_ECC_RESULT_SUCCESS)) {
2379 ret = -EIO;
2380 goto e_dst;
2381 }
2382
2383 /* Save the workarea address since it is updated as we walk through
2384 * to copy the point math result
2385 */
2386 save = dst.address;
2387
2388 /* Save the ECC result X and Y coordinates */
2389 ccp_reverse_get_dm_area(&dst, 0, ecc->u.pm.result.x, 0,
2390 CCP_ECC_MODULUS_BYTES);
2391 dst.address += CCP_ECC_OUTPUT_SIZE;
2392 ccp_reverse_get_dm_area(&dst, 0, ecc->u.pm.result.y, 0,
2393 CCP_ECC_MODULUS_BYTES);
2394 dst.address += CCP_ECC_OUTPUT_SIZE;
2395
2396 /* Restore the workarea address */
2397 dst.address = save;
2398
2399 e_dst:
2400 ccp_dm_free(&dst);
2401
2402 e_src:
2403 ccp_dm_free(&src);
2404
2405 return ret;
2406 }
2407
2408 static int ccp_run_ecc_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd)
2409 {
2410 struct ccp_ecc_engine *ecc = &cmd->u.ecc;
2411
2412 ecc->ecc_result = 0;
2413
2414 if (!ecc->mod ||
2415 (ecc->mod_len > CCP_ECC_MODULUS_BYTES))
2416 return -EINVAL;
2417
2418 switch (ecc->function) {
2419 case CCP_ECC_FUNCTION_MMUL_384BIT:
2420 case CCP_ECC_FUNCTION_MADD_384BIT:
2421 case CCP_ECC_FUNCTION_MINV_384BIT:
2422 return ccp_run_ecc_mm_cmd(cmd_q, cmd);
2423
2424 case CCP_ECC_FUNCTION_PADD_384BIT:
2425 case CCP_ECC_FUNCTION_PMUL_384BIT:
2426 case CCP_ECC_FUNCTION_PDBL_384BIT:
2427 return ccp_run_ecc_pm_cmd(cmd_q, cmd);
2428
2429 default:
2430 return -EINVAL;
2431 }
2432 }
2433
2434 int ccp_run_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd)
2435 {
2436 int ret;
2437
2438 cmd->engine_error = 0;
2439 cmd_q->cmd_error = 0;
2440 cmd_q->int_rcvd = 0;
2441 cmd_q->free_slots = cmd_q->ccp->vdata->perform->get_free_slots(cmd_q);
2442
2443 switch (cmd->engine) {
2444 case CCP_ENGINE_AES:
2445 ret = ccp_run_aes_cmd(cmd_q, cmd);
2446 break;
2447 case CCP_ENGINE_XTS_AES_128:
2448 ret = ccp_run_xts_aes_cmd(cmd_q, cmd);
2449 break;
2450 case CCP_ENGINE_DES3:
2451 ret = ccp_run_des3_cmd(cmd_q, cmd);
2452 break;
2453 case CCP_ENGINE_SHA:
2454 ret = ccp_run_sha_cmd(cmd_q, cmd);
2455 break;
2456 case CCP_ENGINE_RSA:
2457 ret = ccp_run_rsa_cmd(cmd_q, cmd);
2458 break;
2459 case CCP_ENGINE_PASSTHRU:
2460 if (cmd->flags & CCP_CMD_PASSTHRU_NO_DMA_MAP)
2461 ret = ccp_run_passthru_nomap_cmd(cmd_q, cmd);
2462 else
2463 ret = ccp_run_passthru_cmd(cmd_q, cmd);
2464 break;
2465 case CCP_ENGINE_ECC:
2466 ret = ccp_run_ecc_cmd(cmd_q, cmd);
2467 break;
2468 default:
2469 ret = -EINVAL;
2470 }
2471
2472 return ret;
2473 }
Linux with added FPC-III support