Commit | Line | Data |
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63b94509 TL |
1 | /* |
2 | * AMD Cryptographic Coprocessor (CCP) driver | |
3 | * | |
ea0375af | 4 | * Copyright (C) 2013,2016 Advanced Micro Devices, Inc. |
63b94509 TL |
5 | * |
6 | * Author: Tom Lendacky <thomas.lendacky@amd.com> | |
a43eb985 | 7 | * Author: Gary R Hook <gary.hook@amd.com> |
63b94509 TL |
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> | |
63b94509 | 17 | #include <linux/interrupt.h> |
63b94509 | 18 | #include <crypto/scatterwalk.h> |
ea0375af | 19 | #include <linux/ccp.h> |
63b94509 TL |
20 | |
21 | #include "ccp-dev.h" | |
22 | ||
c11baa02 | 23 | /* SHA initial context values */ |
4b394a23 | 24 | static const __be32 ccp_sha1_init[SHA1_DIGEST_SIZE / sizeof(__be32)] = { |
c11baa02 TL |
25 | cpu_to_be32(SHA1_H0), cpu_to_be32(SHA1_H1), |
26 | cpu_to_be32(SHA1_H2), cpu_to_be32(SHA1_H3), | |
4b394a23 | 27 | cpu_to_be32(SHA1_H4), |
c11baa02 TL |
28 | }; |
29 | ||
4b394a23 | 30 | static const __be32 ccp_sha224_init[SHA256_DIGEST_SIZE / sizeof(__be32)] = { |
c11baa02 TL |
31 | cpu_to_be32(SHA224_H0), cpu_to_be32(SHA224_H1), |
32 | cpu_to_be32(SHA224_H2), cpu_to_be32(SHA224_H3), | |
33 | cpu_to_be32(SHA224_H4), cpu_to_be32(SHA224_H5), | |
34 | cpu_to_be32(SHA224_H6), cpu_to_be32(SHA224_H7), | |
35 | }; | |
36 | ||
4b394a23 | 37 | static const __be32 ccp_sha256_init[SHA256_DIGEST_SIZE / sizeof(__be32)] = { |
c11baa02 TL |
38 | cpu_to_be32(SHA256_H0), cpu_to_be32(SHA256_H1), |
39 | cpu_to_be32(SHA256_H2), cpu_to_be32(SHA256_H3), | |
40 | cpu_to_be32(SHA256_H4), cpu_to_be32(SHA256_H5), | |
41 | cpu_to_be32(SHA256_H6), cpu_to_be32(SHA256_H7), | |
42 | }; | |
43 | ||
4b394a23 GH |
44 | #define CCP_NEW_JOBID(ccp) ((ccp->vdata->version == CCP_VERSION(3, 0)) ? \ |
45 | ccp_gen_jobid(ccp) : 0) | |
46 | ||
63b94509 TL |
47 | static u32 ccp_gen_jobid(struct ccp_device *ccp) |
48 | { | |
49 | return atomic_inc_return(&ccp->current_id) & CCP_JOBID_MASK; | |
50 | } | |
51 | ||
52 | static void ccp_sg_free(struct ccp_sg_workarea *wa) | |
53 | { | |
54 | if (wa->dma_count) | |
55 | dma_unmap_sg(wa->dma_dev, wa->dma_sg, wa->nents, wa->dma_dir); | |
56 | ||
57 | wa->dma_count = 0; | |
58 | } | |
59 | ||
60 | static int ccp_init_sg_workarea(struct ccp_sg_workarea *wa, struct device *dev, | |
81a59f00 | 61 | struct scatterlist *sg, u64 len, |
63b94509 TL |
62 | enum dma_data_direction dma_dir) |
63 | { | |
64 | memset(wa, 0, sizeof(*wa)); | |
65 | ||
66 | wa->sg = sg; | |
67 | if (!sg) | |
68 | return 0; | |
69 | ||
fb43f694 TL |
70 | wa->nents = sg_nents_for_len(sg, len); |
71 | if (wa->nents < 0) | |
72 | return wa->nents; | |
73 | ||
63b94509 TL |
74 | wa->bytes_left = len; |
75 | wa->sg_used = 0; | |
76 | ||
77 | if (len == 0) | |
78 | return 0; | |
79 | ||
80 | if (dma_dir == DMA_NONE) | |
81 | return 0; | |
82 | ||
83 | wa->dma_sg = sg; | |
84 | wa->dma_dev = dev; | |
85 | wa->dma_dir = dma_dir; | |
86 | wa->dma_count = dma_map_sg(dev, sg, wa->nents, dma_dir); | |
87 | if (!wa->dma_count) | |
88 | return -ENOMEM; | |
89 | ||
63b94509 TL |
90 | return 0; |
91 | } | |
92 | ||
93 | static void ccp_update_sg_workarea(struct ccp_sg_workarea *wa, unsigned int len) | |
94 | { | |
81a59f00 | 95 | unsigned int nbytes = min_t(u64, len, wa->bytes_left); |
63b94509 TL |
96 | |
97 | if (!wa->sg) | |
98 | return; | |
99 | ||
100 | wa->sg_used += nbytes; | |
101 | wa->bytes_left -= nbytes; | |
102 | if (wa->sg_used == wa->sg->length) { | |
103 | wa->sg = sg_next(wa->sg); | |
104 | wa->sg_used = 0; | |
105 | } | |
106 | } | |
107 | ||
108 | static void ccp_dm_free(struct ccp_dm_workarea *wa) | |
109 | { | |
110 | if (wa->length <= CCP_DMAPOOL_MAX_SIZE) { | |
111 | if (wa->address) | |
112 | dma_pool_free(wa->dma_pool, wa->address, | |
113 | wa->dma.address); | |
114 | } else { | |
115 | if (wa->dma.address) | |
116 | dma_unmap_single(wa->dev, wa->dma.address, wa->length, | |
117 | wa->dma.dir); | |
118 | kfree(wa->address); | |
119 | } | |
120 | ||
121 | wa->address = NULL; | |
122 | wa->dma.address = 0; | |
123 | } | |
124 | ||
125 | static int ccp_init_dm_workarea(struct ccp_dm_workarea *wa, | |
126 | struct ccp_cmd_queue *cmd_q, | |
127 | unsigned int len, | |
128 | enum dma_data_direction dir) | |
129 | { | |
130 | memset(wa, 0, sizeof(*wa)); | |
131 | ||
132 | if (!len) | |
133 | return 0; | |
134 | ||
135 | wa->dev = cmd_q->ccp->dev; | |
136 | wa->length = len; | |
137 | ||
138 | if (len <= CCP_DMAPOOL_MAX_SIZE) { | |
139 | wa->dma_pool = cmd_q->dma_pool; | |
140 | ||
141 | wa->address = dma_pool_alloc(wa->dma_pool, GFP_KERNEL, | |
142 | &wa->dma.address); | |
143 | if (!wa->address) | |
144 | return -ENOMEM; | |
145 | ||
146 | wa->dma.length = CCP_DMAPOOL_MAX_SIZE; | |
147 | ||
148 | memset(wa->address, 0, CCP_DMAPOOL_MAX_SIZE); | |
149 | } else { | |
150 | wa->address = kzalloc(len, GFP_KERNEL); | |
151 | if (!wa->address) | |
152 | return -ENOMEM; | |
153 | ||
154 | wa->dma.address = dma_map_single(wa->dev, wa->address, len, | |
155 | dir); | |
156 | if (!wa->dma.address) | |
157 | return -ENOMEM; | |
158 | ||
159 | wa->dma.length = len; | |
160 | } | |
161 | wa->dma.dir = dir; | |
162 | ||
163 | return 0; | |
164 | } | |
165 | ||
166 | static void ccp_set_dm_area(struct ccp_dm_workarea *wa, unsigned int wa_offset, | |
167 | struct scatterlist *sg, unsigned int sg_offset, | |
168 | unsigned int len) | |
169 | { | |
170 | WARN_ON(!wa->address); | |
171 | ||
172 | scatterwalk_map_and_copy(wa->address + wa_offset, sg, sg_offset, len, | |
173 | 0); | |
174 | } | |
175 | ||
176 | static void ccp_get_dm_area(struct ccp_dm_workarea *wa, unsigned int wa_offset, | |
177 | struct scatterlist *sg, unsigned int sg_offset, | |
178 | unsigned int len) | |
179 | { | |
180 | WARN_ON(!wa->address); | |
181 | ||
182 | scatterwalk_map_and_copy(wa->address + wa_offset, sg, sg_offset, len, | |
183 | 1); | |
184 | } | |
185 | ||
355eba5d TL |
186 | static int ccp_reverse_set_dm_area(struct ccp_dm_workarea *wa, |
187 | struct scatterlist *sg, | |
188 | unsigned int len, unsigned int se_len, | |
189 | bool sign_extend) | |
63b94509 | 190 | { |
956ee21a | 191 | unsigned int nbytes, sg_offset, dm_offset, sb_len, i; |
63b94509 TL |
192 | u8 buffer[CCP_REVERSE_BUF_SIZE]; |
193 | ||
355eba5d TL |
194 | if (WARN_ON(se_len > sizeof(buffer))) |
195 | return -EINVAL; | |
63b94509 TL |
196 | |
197 | sg_offset = len; | |
198 | dm_offset = 0; | |
199 | nbytes = len; | |
200 | while (nbytes) { | |
956ee21a GH |
201 | sb_len = min_t(unsigned int, nbytes, se_len); |
202 | sg_offset -= sb_len; | |
63b94509 | 203 | |
956ee21a GH |
204 | scatterwalk_map_and_copy(buffer, sg, sg_offset, sb_len, 0); |
205 | for (i = 0; i < sb_len; i++) | |
206 | wa->address[dm_offset + i] = buffer[sb_len - i - 1]; | |
63b94509 | 207 | |
956ee21a GH |
208 | dm_offset += sb_len; |
209 | nbytes -= sb_len; | |
63b94509 | 210 | |
956ee21a | 211 | if ((sb_len != se_len) && sign_extend) { |
63b94509 TL |
212 | /* Must sign-extend to nearest sign-extend length */ |
213 | if (wa->address[dm_offset - 1] & 0x80) | |
214 | memset(wa->address + dm_offset, 0xff, | |
956ee21a | 215 | se_len - sb_len); |
63b94509 TL |
216 | } |
217 | } | |
355eba5d TL |
218 | |
219 | return 0; | |
63b94509 TL |
220 | } |
221 | ||
222 | static void ccp_reverse_get_dm_area(struct ccp_dm_workarea *wa, | |
223 | struct scatterlist *sg, | |
224 | unsigned int len) | |
225 | { | |
956ee21a | 226 | unsigned int nbytes, sg_offset, dm_offset, sb_len, i; |
63b94509 TL |
227 | u8 buffer[CCP_REVERSE_BUF_SIZE]; |
228 | ||
229 | sg_offset = 0; | |
230 | dm_offset = len; | |
231 | nbytes = len; | |
232 | while (nbytes) { | |
956ee21a GH |
233 | sb_len = min_t(unsigned int, nbytes, sizeof(buffer)); |
234 | dm_offset -= sb_len; | |
63b94509 | 235 | |
956ee21a GH |
236 | for (i = 0; i < sb_len; i++) |
237 | buffer[sb_len - i - 1] = wa->address[dm_offset + i]; | |
238 | scatterwalk_map_and_copy(buffer, sg, sg_offset, sb_len, 1); | |
63b94509 | 239 | |
956ee21a GH |
240 | sg_offset += sb_len; |
241 | nbytes -= sb_len; | |
63b94509 TL |
242 | } |
243 | } | |
244 | ||
245 | static void ccp_free_data(struct ccp_data *data, struct ccp_cmd_queue *cmd_q) | |
246 | { | |
247 | ccp_dm_free(&data->dm_wa); | |
248 | ccp_sg_free(&data->sg_wa); | |
249 | } | |
250 | ||
251 | static int ccp_init_data(struct ccp_data *data, struct ccp_cmd_queue *cmd_q, | |
81a59f00 | 252 | struct scatterlist *sg, u64 sg_len, |
63b94509 TL |
253 | unsigned int dm_len, |
254 | enum dma_data_direction dir) | |
255 | { | |
256 | int ret; | |
257 | ||
258 | memset(data, 0, sizeof(*data)); | |
259 | ||
260 | ret = ccp_init_sg_workarea(&data->sg_wa, cmd_q->ccp->dev, sg, sg_len, | |
261 | dir); | |
262 | if (ret) | |
263 | goto e_err; | |
264 | ||
265 | ret = ccp_init_dm_workarea(&data->dm_wa, cmd_q, dm_len, dir); | |
266 | if (ret) | |
267 | goto e_err; | |
268 | ||
269 | return 0; | |
270 | ||
271 | e_err: | |
272 | ccp_free_data(data, cmd_q); | |
273 | ||
274 | return ret; | |
275 | } | |
276 | ||
277 | static unsigned int ccp_queue_buf(struct ccp_data *data, unsigned int from) | |
278 | { | |
279 | struct ccp_sg_workarea *sg_wa = &data->sg_wa; | |
280 | struct ccp_dm_workarea *dm_wa = &data->dm_wa; | |
281 | unsigned int buf_count, nbytes; | |
282 | ||
283 | /* Clear the buffer if setting it */ | |
284 | if (!from) | |
285 | memset(dm_wa->address, 0, dm_wa->length); | |
286 | ||
287 | if (!sg_wa->sg) | |
288 | return 0; | |
289 | ||
81a59f00 TL |
290 | /* Perform the copy operation |
291 | * nbytes will always be <= UINT_MAX because dm_wa->length is | |
292 | * an unsigned int | |
293 | */ | |
294 | nbytes = min_t(u64, sg_wa->bytes_left, dm_wa->length); | |
63b94509 TL |
295 | scatterwalk_map_and_copy(dm_wa->address, sg_wa->sg, sg_wa->sg_used, |
296 | nbytes, from); | |
297 | ||
298 | /* Update the structures and generate the count */ | |
299 | buf_count = 0; | |
300 | while (sg_wa->bytes_left && (buf_count < dm_wa->length)) { | |
81a59f00 TL |
301 | nbytes = min(sg_wa->sg->length - sg_wa->sg_used, |
302 | dm_wa->length - buf_count); | |
303 | nbytes = min_t(u64, sg_wa->bytes_left, nbytes); | |
63b94509 TL |
304 | |
305 | buf_count += nbytes; | |
306 | ccp_update_sg_workarea(sg_wa, nbytes); | |
307 | } | |
308 | ||
309 | return buf_count; | |
310 | } | |
311 | ||
312 | static unsigned int ccp_fill_queue_buf(struct ccp_data *data) | |
313 | { | |
314 | return ccp_queue_buf(data, 0); | |
315 | } | |
316 | ||
317 | static unsigned int ccp_empty_queue_buf(struct ccp_data *data) | |
318 | { | |
319 | return ccp_queue_buf(data, 1); | |
320 | } | |
321 | ||
322 | static void ccp_prepare_data(struct ccp_data *src, struct ccp_data *dst, | |
323 | struct ccp_op *op, unsigned int block_size, | |
324 | bool blocksize_op) | |
325 | { | |
326 | unsigned int sg_src_len, sg_dst_len, op_len; | |
327 | ||
328 | /* The CCP can only DMA from/to one address each per operation. This | |
329 | * requires that we find the smallest DMA area between the source | |
81a59f00 TL |
330 | * and destination. The resulting len values will always be <= UINT_MAX |
331 | * because the dma length is an unsigned int. | |
63b94509 | 332 | */ |
81a59f00 TL |
333 | sg_src_len = sg_dma_len(src->sg_wa.sg) - src->sg_wa.sg_used; |
334 | sg_src_len = min_t(u64, src->sg_wa.bytes_left, sg_src_len); | |
63b94509 TL |
335 | |
336 | if (dst) { | |
81a59f00 TL |
337 | sg_dst_len = sg_dma_len(dst->sg_wa.sg) - dst->sg_wa.sg_used; |
338 | sg_dst_len = min_t(u64, src->sg_wa.bytes_left, sg_dst_len); | |
63b94509 | 339 | op_len = min(sg_src_len, sg_dst_len); |
8db88467 | 340 | } else { |
63b94509 | 341 | op_len = sg_src_len; |
8db88467 | 342 | } |
63b94509 TL |
343 | |
344 | /* The data operation length will be at least block_size in length | |
345 | * or the smaller of available sg room remaining for the source or | |
346 | * the destination | |
347 | */ | |
348 | op_len = max(op_len, block_size); | |
349 | ||
350 | /* Unless we have to buffer data, there's no reason to wait */ | |
351 | op->soc = 0; | |
352 | ||
353 | if (sg_src_len < block_size) { | |
354 | /* Not enough data in the sg element, so it | |
355 | * needs to be buffered into a blocksize chunk | |
356 | */ | |
357 | int cp_len = ccp_fill_queue_buf(src); | |
358 | ||
359 | op->soc = 1; | |
360 | op->src.u.dma.address = src->dm_wa.dma.address; | |
361 | op->src.u.dma.offset = 0; | |
362 | op->src.u.dma.length = (blocksize_op) ? block_size : cp_len; | |
363 | } else { | |
364 | /* Enough data in the sg element, but we need to | |
365 | * adjust for any previously copied data | |
366 | */ | |
367 | op->src.u.dma.address = sg_dma_address(src->sg_wa.sg); | |
368 | op->src.u.dma.offset = src->sg_wa.sg_used; | |
369 | op->src.u.dma.length = op_len & ~(block_size - 1); | |
370 | ||
371 | ccp_update_sg_workarea(&src->sg_wa, op->src.u.dma.length); | |
372 | } | |
373 | ||
374 | if (dst) { | |
375 | if (sg_dst_len < block_size) { | |
376 | /* Not enough room in the sg element or we're on the | |
377 | * last piece of data (when using padding), so the | |
378 | * output needs to be buffered into a blocksize chunk | |
379 | */ | |
380 | op->soc = 1; | |
381 | op->dst.u.dma.address = dst->dm_wa.dma.address; | |
382 | op->dst.u.dma.offset = 0; | |
383 | op->dst.u.dma.length = op->src.u.dma.length; | |
384 | } else { | |
385 | /* Enough room in the sg element, but we need to | |
386 | * adjust for any previously used area | |
387 | */ | |
388 | op->dst.u.dma.address = sg_dma_address(dst->sg_wa.sg); | |
389 | op->dst.u.dma.offset = dst->sg_wa.sg_used; | |
390 | op->dst.u.dma.length = op->src.u.dma.length; | |
391 | } | |
392 | } | |
393 | } | |
394 | ||
395 | static void ccp_process_data(struct ccp_data *src, struct ccp_data *dst, | |
396 | struct ccp_op *op) | |
397 | { | |
398 | op->init = 0; | |
399 | ||
400 | if (dst) { | |
401 | if (op->dst.u.dma.address == dst->dm_wa.dma.address) | |
402 | ccp_empty_queue_buf(dst); | |
403 | else | |
404 | ccp_update_sg_workarea(&dst->sg_wa, | |
405 | op->dst.u.dma.length); | |
406 | } | |
407 | } | |
408 | ||
956ee21a GH |
409 | static int ccp_copy_to_from_sb(struct ccp_cmd_queue *cmd_q, |
410 | struct ccp_dm_workarea *wa, u32 jobid, u32 sb, | |
411 | u32 byte_swap, bool from) | |
63b94509 TL |
412 | { |
413 | struct ccp_op op; | |
414 | ||
415 | memset(&op, 0, sizeof(op)); | |
416 | ||
417 | op.cmd_q = cmd_q; | |
418 | op.jobid = jobid; | |
419 | op.eom = 1; | |
420 | ||
421 | if (from) { | |
422 | op.soc = 1; | |
956ee21a GH |
423 | op.src.type = CCP_MEMTYPE_SB; |
424 | op.src.u.sb = sb; | |
63b94509 TL |
425 | op.dst.type = CCP_MEMTYPE_SYSTEM; |
426 | op.dst.u.dma.address = wa->dma.address; | |
427 | op.dst.u.dma.length = wa->length; | |
428 | } else { | |
429 | op.src.type = CCP_MEMTYPE_SYSTEM; | |
430 | op.src.u.dma.address = wa->dma.address; | |
431 | op.src.u.dma.length = wa->length; | |
956ee21a GH |
432 | op.dst.type = CCP_MEMTYPE_SB; |
433 | op.dst.u.sb = sb; | |
63b94509 TL |
434 | } |
435 | ||
436 | op.u.passthru.byte_swap = byte_swap; | |
437 | ||
a43eb985 | 438 | return cmd_q->ccp->vdata->perform->passthru(&op); |
63b94509 TL |
439 | } |
440 | ||
956ee21a GH |
441 | static int ccp_copy_to_sb(struct ccp_cmd_queue *cmd_q, |
442 | struct ccp_dm_workarea *wa, u32 jobid, u32 sb, | |
443 | u32 byte_swap) | |
63b94509 | 444 | { |
956ee21a | 445 | return ccp_copy_to_from_sb(cmd_q, wa, jobid, sb, byte_swap, false); |
63b94509 TL |
446 | } |
447 | ||
956ee21a GH |
448 | static int ccp_copy_from_sb(struct ccp_cmd_queue *cmd_q, |
449 | struct ccp_dm_workarea *wa, u32 jobid, u32 sb, | |
450 | u32 byte_swap) | |
63b94509 | 451 | { |
956ee21a | 452 | return ccp_copy_to_from_sb(cmd_q, wa, jobid, sb, byte_swap, true); |
63b94509 TL |
453 | } |
454 | ||
455 | static int ccp_run_aes_cmac_cmd(struct ccp_cmd_queue *cmd_q, | |
456 | struct ccp_cmd *cmd) | |
457 | { | |
458 | struct ccp_aes_engine *aes = &cmd->u.aes; | |
459 | struct ccp_dm_workarea key, ctx; | |
460 | struct ccp_data src; | |
461 | struct ccp_op op; | |
462 | unsigned int dm_offset; | |
463 | int ret; | |
464 | ||
465 | if (!((aes->key_len == AES_KEYSIZE_128) || | |
466 | (aes->key_len == AES_KEYSIZE_192) || | |
467 | (aes->key_len == AES_KEYSIZE_256))) | |
468 | return -EINVAL; | |
469 | ||
470 | if (aes->src_len & (AES_BLOCK_SIZE - 1)) | |
471 | return -EINVAL; | |
472 | ||
473 | if (aes->iv_len != AES_BLOCK_SIZE) | |
474 | return -EINVAL; | |
475 | ||
476 | if (!aes->key || !aes->iv || !aes->src) | |
477 | return -EINVAL; | |
478 | ||
479 | if (aes->cmac_final) { | |
480 | if (aes->cmac_key_len != AES_BLOCK_SIZE) | |
481 | return -EINVAL; | |
482 | ||
483 | if (!aes->cmac_key) | |
484 | return -EINVAL; | |
485 | } | |
486 | ||
956ee21a GH |
487 | BUILD_BUG_ON(CCP_AES_KEY_SB_COUNT != 1); |
488 | BUILD_BUG_ON(CCP_AES_CTX_SB_COUNT != 1); | |
63b94509 TL |
489 | |
490 | ret = -EIO; | |
491 | memset(&op, 0, sizeof(op)); | |
492 | op.cmd_q = cmd_q; | |
4b394a23 | 493 | op.jobid = CCP_NEW_JOBID(cmd_q->ccp); |
956ee21a GH |
494 | op.sb_key = cmd_q->sb_key; |
495 | op.sb_ctx = cmd_q->sb_ctx; | |
63b94509 TL |
496 | op.init = 1; |
497 | op.u.aes.type = aes->type; | |
498 | op.u.aes.mode = aes->mode; | |
499 | op.u.aes.action = aes->action; | |
500 | ||
956ee21a | 501 | /* All supported key sizes fit in a single (32-byte) SB entry |
63b94509 TL |
502 | * and must be in little endian format. Use the 256-bit byte |
503 | * swap passthru option to convert from big endian to little | |
504 | * endian. | |
505 | */ | |
506 | ret = ccp_init_dm_workarea(&key, cmd_q, | |
956ee21a | 507 | CCP_AES_KEY_SB_COUNT * CCP_SB_BYTES, |
63b94509 TL |
508 | DMA_TO_DEVICE); |
509 | if (ret) | |
510 | return ret; | |
511 | ||
956ee21a | 512 | dm_offset = CCP_SB_BYTES - aes->key_len; |
63b94509 | 513 | ccp_set_dm_area(&key, dm_offset, aes->key, 0, aes->key_len); |
956ee21a GH |
514 | ret = ccp_copy_to_sb(cmd_q, &key, op.jobid, op.sb_key, |
515 | CCP_PASSTHRU_BYTESWAP_256BIT); | |
63b94509 TL |
516 | if (ret) { |
517 | cmd->engine_error = cmd_q->cmd_error; | |
518 | goto e_key; | |
519 | } | |
520 | ||
956ee21a | 521 | /* The AES context fits in a single (32-byte) SB entry and |
63b94509 TL |
522 | * must be in little endian format. Use the 256-bit byte swap |
523 | * passthru option to convert from big endian to little endian. | |
524 | */ | |
525 | ret = ccp_init_dm_workarea(&ctx, cmd_q, | |
956ee21a | 526 | CCP_AES_CTX_SB_COUNT * CCP_SB_BYTES, |
63b94509 TL |
527 | DMA_BIDIRECTIONAL); |
528 | if (ret) | |
529 | goto e_key; | |
530 | ||
956ee21a | 531 | dm_offset = CCP_SB_BYTES - AES_BLOCK_SIZE; |
63b94509 | 532 | ccp_set_dm_area(&ctx, dm_offset, aes->iv, 0, aes->iv_len); |
956ee21a GH |
533 | ret = ccp_copy_to_sb(cmd_q, &ctx, op.jobid, op.sb_ctx, |
534 | CCP_PASSTHRU_BYTESWAP_256BIT); | |
63b94509 TL |
535 | if (ret) { |
536 | cmd->engine_error = cmd_q->cmd_error; | |
537 | goto e_ctx; | |
538 | } | |
539 | ||
540 | /* Send data to the CCP AES engine */ | |
541 | ret = ccp_init_data(&src, cmd_q, aes->src, aes->src_len, | |
542 | AES_BLOCK_SIZE, DMA_TO_DEVICE); | |
543 | if (ret) | |
544 | goto e_ctx; | |
545 | ||
546 | while (src.sg_wa.bytes_left) { | |
547 | ccp_prepare_data(&src, NULL, &op, AES_BLOCK_SIZE, true); | |
548 | if (aes->cmac_final && !src.sg_wa.bytes_left) { | |
549 | op.eom = 1; | |
550 | ||
551 | /* Push the K1/K2 key to the CCP now */ | |
956ee21a GH |
552 | ret = ccp_copy_from_sb(cmd_q, &ctx, op.jobid, |
553 | op.sb_ctx, | |
554 | CCP_PASSTHRU_BYTESWAP_256BIT); | |
63b94509 TL |
555 | if (ret) { |
556 | cmd->engine_error = cmd_q->cmd_error; | |
557 | goto e_src; | |
558 | } | |
559 | ||
560 | ccp_set_dm_area(&ctx, 0, aes->cmac_key, 0, | |
561 | aes->cmac_key_len); | |
956ee21a GH |
562 | ret = ccp_copy_to_sb(cmd_q, &ctx, op.jobid, op.sb_ctx, |
563 | CCP_PASSTHRU_BYTESWAP_256BIT); | |
63b94509 TL |
564 | if (ret) { |
565 | cmd->engine_error = cmd_q->cmd_error; | |
566 | goto e_src; | |
567 | } | |
568 | } | |
569 | ||
a43eb985 | 570 | ret = cmd_q->ccp->vdata->perform->aes(&op); |
63b94509 TL |
571 | if (ret) { |
572 | cmd->engine_error = cmd_q->cmd_error; | |
573 | goto e_src; | |
574 | } | |
575 | ||
576 | ccp_process_data(&src, NULL, &op); | |
577 | } | |
578 | ||
579 | /* Retrieve the AES context - convert from LE to BE using | |
580 | * 32-byte (256-bit) byteswapping | |
581 | */ | |
956ee21a GH |
582 | ret = ccp_copy_from_sb(cmd_q, &ctx, op.jobid, op.sb_ctx, |
583 | CCP_PASSTHRU_BYTESWAP_256BIT); | |
63b94509 TL |
584 | if (ret) { |
585 | cmd->engine_error = cmd_q->cmd_error; | |
586 | goto e_src; | |
587 | } | |
588 | ||
589 | /* ...but we only need AES_BLOCK_SIZE bytes */ | |
956ee21a | 590 | dm_offset = CCP_SB_BYTES - AES_BLOCK_SIZE; |
63b94509 TL |
591 | ccp_get_dm_area(&ctx, dm_offset, aes->iv, 0, aes->iv_len); |
592 | ||
593 | e_src: | |
594 | ccp_free_data(&src, cmd_q); | |
595 | ||
596 | e_ctx: | |
597 | ccp_dm_free(&ctx); | |
598 | ||
599 | e_key: | |
600 | ccp_dm_free(&key); | |
601 | ||
602 | return ret; | |
603 | } | |
604 | ||
605 | static int ccp_run_aes_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd) | |
606 | { | |
607 | struct ccp_aes_engine *aes = &cmd->u.aes; | |
608 | struct ccp_dm_workarea key, ctx; | |
609 | struct ccp_data src, dst; | |
610 | struct ccp_op op; | |
611 | unsigned int dm_offset; | |
612 | bool in_place = false; | |
613 | int ret; | |
614 | ||
615 | if (aes->mode == CCP_AES_MODE_CMAC) | |
616 | return ccp_run_aes_cmac_cmd(cmd_q, cmd); | |
617 | ||
618 | if (!((aes->key_len == AES_KEYSIZE_128) || | |
619 | (aes->key_len == AES_KEYSIZE_192) || | |
620 | (aes->key_len == AES_KEYSIZE_256))) | |
621 | return -EINVAL; | |
622 | ||
623 | if (((aes->mode == CCP_AES_MODE_ECB) || | |
624 | (aes->mode == CCP_AES_MODE_CBC) || | |
625 | (aes->mode == CCP_AES_MODE_CFB)) && | |
626 | (aes->src_len & (AES_BLOCK_SIZE - 1))) | |
627 | return -EINVAL; | |
628 | ||
629 | if (!aes->key || !aes->src || !aes->dst) | |
630 | return -EINVAL; | |
631 | ||
632 | if (aes->mode != CCP_AES_MODE_ECB) { | |
633 | if (aes->iv_len != AES_BLOCK_SIZE) | |
634 | return -EINVAL; | |
635 | ||
636 | if (!aes->iv) | |
637 | return -EINVAL; | |
638 | } | |
639 | ||
956ee21a GH |
640 | BUILD_BUG_ON(CCP_AES_KEY_SB_COUNT != 1); |
641 | BUILD_BUG_ON(CCP_AES_CTX_SB_COUNT != 1); | |
63b94509 TL |
642 | |
643 | ret = -EIO; | |
644 | memset(&op, 0, sizeof(op)); | |
645 | op.cmd_q = cmd_q; | |
4b394a23 | 646 | op.jobid = CCP_NEW_JOBID(cmd_q->ccp); |
956ee21a GH |
647 | op.sb_key = cmd_q->sb_key; |
648 | op.sb_ctx = cmd_q->sb_ctx; | |
63b94509 TL |
649 | op.init = (aes->mode == CCP_AES_MODE_ECB) ? 0 : 1; |
650 | op.u.aes.type = aes->type; | |
651 | op.u.aes.mode = aes->mode; | |
652 | op.u.aes.action = aes->action; | |
653 | ||
956ee21a | 654 | /* All supported key sizes fit in a single (32-byte) SB entry |
63b94509 TL |
655 | * and must be in little endian format. Use the 256-bit byte |
656 | * swap passthru option to convert from big endian to little | |
657 | * endian. | |
658 | */ | |
659 | ret = ccp_init_dm_workarea(&key, cmd_q, | |
956ee21a | 660 | CCP_AES_KEY_SB_COUNT * CCP_SB_BYTES, |
63b94509 TL |
661 | DMA_TO_DEVICE); |
662 | if (ret) | |
663 | return ret; | |
664 | ||
956ee21a | 665 | dm_offset = CCP_SB_BYTES - aes->key_len; |
63b94509 | 666 | ccp_set_dm_area(&key, dm_offset, aes->key, 0, aes->key_len); |
956ee21a GH |
667 | ret = ccp_copy_to_sb(cmd_q, &key, op.jobid, op.sb_key, |
668 | CCP_PASSTHRU_BYTESWAP_256BIT); | |
63b94509 TL |
669 | if (ret) { |
670 | cmd->engine_error = cmd_q->cmd_error; | |
671 | goto e_key; | |
672 | } | |
673 | ||
956ee21a | 674 | /* The AES context fits in a single (32-byte) SB entry and |
63b94509 TL |
675 | * must be in little endian format. Use the 256-bit byte swap |
676 | * passthru option to convert from big endian to little endian. | |
677 | */ | |
678 | ret = ccp_init_dm_workarea(&ctx, cmd_q, | |
956ee21a | 679 | CCP_AES_CTX_SB_COUNT * CCP_SB_BYTES, |
63b94509 TL |
680 | DMA_BIDIRECTIONAL); |
681 | if (ret) | |
682 | goto e_key; | |
683 | ||
684 | if (aes->mode != CCP_AES_MODE_ECB) { | |
4b394a23 | 685 | /* Load the AES context - convert to LE */ |
956ee21a | 686 | dm_offset = CCP_SB_BYTES - AES_BLOCK_SIZE; |
63b94509 | 687 | ccp_set_dm_area(&ctx, dm_offset, aes->iv, 0, aes->iv_len); |
956ee21a GH |
688 | ret = ccp_copy_to_sb(cmd_q, &ctx, op.jobid, op.sb_ctx, |
689 | CCP_PASSTHRU_BYTESWAP_256BIT); | |
63b94509 TL |
690 | if (ret) { |
691 | cmd->engine_error = cmd_q->cmd_error; | |
692 | goto e_ctx; | |
693 | } | |
694 | } | |
695 | ||
696 | /* Prepare the input and output data workareas. For in-place | |
697 | * operations we need to set the dma direction to BIDIRECTIONAL | |
698 | * and copy the src workarea to the dst workarea. | |
699 | */ | |
700 | if (sg_virt(aes->src) == sg_virt(aes->dst)) | |
701 | in_place = true; | |
702 | ||
703 | ret = ccp_init_data(&src, cmd_q, aes->src, aes->src_len, | |
704 | AES_BLOCK_SIZE, | |
705 | in_place ? DMA_BIDIRECTIONAL : DMA_TO_DEVICE); | |
706 | if (ret) | |
707 | goto e_ctx; | |
708 | ||
8db88467 | 709 | if (in_place) { |
63b94509 | 710 | dst = src; |
8db88467 | 711 | } else { |
63b94509 TL |
712 | ret = ccp_init_data(&dst, cmd_q, aes->dst, aes->src_len, |
713 | AES_BLOCK_SIZE, DMA_FROM_DEVICE); | |
714 | if (ret) | |
715 | goto e_src; | |
716 | } | |
717 | ||
718 | /* Send data to the CCP AES engine */ | |
719 | while (src.sg_wa.bytes_left) { | |
720 | ccp_prepare_data(&src, &dst, &op, AES_BLOCK_SIZE, true); | |
721 | if (!src.sg_wa.bytes_left) { | |
722 | op.eom = 1; | |
723 | ||
724 | /* Since we don't retrieve the AES context in ECB | |
725 | * mode we have to wait for the operation to complete | |
726 | * on the last piece of data | |
727 | */ | |
728 | if (aes->mode == CCP_AES_MODE_ECB) | |
729 | op.soc = 1; | |
730 | } | |
731 | ||
a43eb985 | 732 | ret = cmd_q->ccp->vdata->perform->aes(&op); |
63b94509 TL |
733 | if (ret) { |
734 | cmd->engine_error = cmd_q->cmd_error; | |
735 | goto e_dst; | |
736 | } | |
737 | ||
738 | ccp_process_data(&src, &dst, &op); | |
739 | } | |
740 | ||
741 | if (aes->mode != CCP_AES_MODE_ECB) { | |
742 | /* Retrieve the AES context - convert from LE to BE using | |
743 | * 32-byte (256-bit) byteswapping | |
744 | */ | |
956ee21a GH |
745 | ret = ccp_copy_from_sb(cmd_q, &ctx, op.jobid, op.sb_ctx, |
746 | CCP_PASSTHRU_BYTESWAP_256BIT); | |
63b94509 TL |
747 | if (ret) { |
748 | cmd->engine_error = cmd_q->cmd_error; | |
749 | goto e_dst; | |
750 | } | |
751 | ||
752 | /* ...but we only need AES_BLOCK_SIZE bytes */ | |
956ee21a | 753 | dm_offset = CCP_SB_BYTES - AES_BLOCK_SIZE; |
63b94509 TL |
754 | ccp_get_dm_area(&ctx, dm_offset, aes->iv, 0, aes->iv_len); |
755 | } | |
756 | ||
757 | e_dst: | |
758 | if (!in_place) | |
759 | ccp_free_data(&dst, cmd_q); | |
760 | ||
761 | e_src: | |
762 | ccp_free_data(&src, cmd_q); | |
763 | ||
764 | e_ctx: | |
765 | ccp_dm_free(&ctx); | |
766 | ||
767 | e_key: | |
768 | ccp_dm_free(&key); | |
769 | ||
770 | return ret; | |
771 | } | |
772 | ||
773 | static int ccp_run_xts_aes_cmd(struct ccp_cmd_queue *cmd_q, | |
774 | struct ccp_cmd *cmd) | |
775 | { | |
776 | struct ccp_xts_aes_engine *xts = &cmd->u.xts; | |
777 | struct ccp_dm_workarea key, ctx; | |
778 | struct ccp_data src, dst; | |
779 | struct ccp_op op; | |
780 | unsigned int unit_size, dm_offset; | |
781 | bool in_place = false; | |
782 | int ret; | |
783 | ||
784 | switch (xts->unit_size) { | |
785 | case CCP_XTS_AES_UNIT_SIZE_16: | |
786 | unit_size = 16; | |
787 | break; | |
788 | case CCP_XTS_AES_UNIT_SIZE_512: | |
789 | unit_size = 512; | |
790 | break; | |
791 | case CCP_XTS_AES_UNIT_SIZE_1024: | |
792 | unit_size = 1024; | |
793 | break; | |
794 | case CCP_XTS_AES_UNIT_SIZE_2048: | |
795 | unit_size = 2048; | |
796 | break; | |
797 | case CCP_XTS_AES_UNIT_SIZE_4096: | |
798 | unit_size = 4096; | |
799 | break; | |
800 | ||
801 | default: | |
802 | return -EINVAL; | |
803 | } | |
804 | ||
805 | if (xts->key_len != AES_KEYSIZE_128) | |
806 | return -EINVAL; | |
807 | ||
808 | if (!xts->final && (xts->src_len & (AES_BLOCK_SIZE - 1))) | |
809 | return -EINVAL; | |
810 | ||
811 | if (xts->iv_len != AES_BLOCK_SIZE) | |
812 | return -EINVAL; | |
813 | ||
814 | if (!xts->key || !xts->iv || !xts->src || !xts->dst) | |
815 | return -EINVAL; | |
816 | ||
956ee21a GH |
817 | BUILD_BUG_ON(CCP_XTS_AES_KEY_SB_COUNT != 1); |
818 | BUILD_BUG_ON(CCP_XTS_AES_CTX_SB_COUNT != 1); | |
63b94509 TL |
819 | |
820 | ret = -EIO; | |
821 | memset(&op, 0, sizeof(op)); | |
822 | op.cmd_q = cmd_q; | |
4b394a23 | 823 | op.jobid = CCP_NEW_JOBID(cmd_q->ccp); |
956ee21a GH |
824 | op.sb_key = cmd_q->sb_key; |
825 | op.sb_ctx = cmd_q->sb_ctx; | |
63b94509 TL |
826 | op.init = 1; |
827 | op.u.xts.action = xts->action; | |
828 | op.u.xts.unit_size = xts->unit_size; | |
829 | ||
956ee21a | 830 | /* All supported key sizes fit in a single (32-byte) SB entry |
63b94509 TL |
831 | * and must be in little endian format. Use the 256-bit byte |
832 | * swap passthru option to convert from big endian to little | |
833 | * endian. | |
834 | */ | |
835 | ret = ccp_init_dm_workarea(&key, cmd_q, | |
956ee21a | 836 | CCP_XTS_AES_KEY_SB_COUNT * CCP_SB_BYTES, |
63b94509 TL |
837 | DMA_TO_DEVICE); |
838 | if (ret) | |
839 | return ret; | |
840 | ||
956ee21a | 841 | dm_offset = CCP_SB_BYTES - AES_KEYSIZE_128; |
63b94509 TL |
842 | ccp_set_dm_area(&key, dm_offset, xts->key, 0, xts->key_len); |
843 | ccp_set_dm_area(&key, 0, xts->key, dm_offset, xts->key_len); | |
956ee21a GH |
844 | ret = ccp_copy_to_sb(cmd_q, &key, op.jobid, op.sb_key, |
845 | CCP_PASSTHRU_BYTESWAP_256BIT); | |
63b94509 TL |
846 | if (ret) { |
847 | cmd->engine_error = cmd_q->cmd_error; | |
848 | goto e_key; | |
849 | } | |
850 | ||
956ee21a | 851 | /* The AES context fits in a single (32-byte) SB entry and |
63b94509 TL |
852 | * for XTS is already in little endian format so no byte swapping |
853 | * is needed. | |
854 | */ | |
855 | ret = ccp_init_dm_workarea(&ctx, cmd_q, | |
956ee21a | 856 | CCP_XTS_AES_CTX_SB_COUNT * CCP_SB_BYTES, |
63b94509 TL |
857 | DMA_BIDIRECTIONAL); |
858 | if (ret) | |
859 | goto e_key; | |
860 | ||
861 | ccp_set_dm_area(&ctx, 0, xts->iv, 0, xts->iv_len); | |
956ee21a GH |
862 | ret = ccp_copy_to_sb(cmd_q, &ctx, op.jobid, op.sb_ctx, |
863 | CCP_PASSTHRU_BYTESWAP_NOOP); | |
63b94509 TL |
864 | if (ret) { |
865 | cmd->engine_error = cmd_q->cmd_error; | |
866 | goto e_ctx; | |
867 | } | |
868 | ||
869 | /* Prepare the input and output data workareas. For in-place | |
870 | * operations we need to set the dma direction to BIDIRECTIONAL | |
871 | * and copy the src workarea to the dst workarea. | |
872 | */ | |
873 | if (sg_virt(xts->src) == sg_virt(xts->dst)) | |
874 | in_place = true; | |
875 | ||
876 | ret = ccp_init_data(&src, cmd_q, xts->src, xts->src_len, | |
877 | unit_size, | |
878 | in_place ? DMA_BIDIRECTIONAL : DMA_TO_DEVICE); | |
879 | if (ret) | |
880 | goto e_ctx; | |
881 | ||
8db88467 | 882 | if (in_place) { |
63b94509 | 883 | dst = src; |
8db88467 | 884 | } else { |
63b94509 TL |
885 | ret = ccp_init_data(&dst, cmd_q, xts->dst, xts->src_len, |
886 | unit_size, DMA_FROM_DEVICE); | |
887 | if (ret) | |
888 | goto e_src; | |
889 | } | |
890 | ||
891 | /* Send data to the CCP AES engine */ | |
892 | while (src.sg_wa.bytes_left) { | |
893 | ccp_prepare_data(&src, &dst, &op, unit_size, true); | |
894 | if (!src.sg_wa.bytes_left) | |
895 | op.eom = 1; | |
896 | ||
a43eb985 | 897 | ret = cmd_q->ccp->vdata->perform->xts_aes(&op); |
63b94509 TL |
898 | if (ret) { |
899 | cmd->engine_error = cmd_q->cmd_error; | |
900 | goto e_dst; | |
901 | } | |
902 | ||
903 | ccp_process_data(&src, &dst, &op); | |
904 | } | |
905 | ||
906 | /* Retrieve the AES context - convert from LE to BE using | |
907 | * 32-byte (256-bit) byteswapping | |
908 | */ | |
956ee21a GH |
909 | ret = ccp_copy_from_sb(cmd_q, &ctx, op.jobid, op.sb_ctx, |
910 | CCP_PASSTHRU_BYTESWAP_256BIT); | |
63b94509 TL |
911 | if (ret) { |
912 | cmd->engine_error = cmd_q->cmd_error; | |
913 | goto e_dst; | |
914 | } | |
915 | ||
916 | /* ...but we only need AES_BLOCK_SIZE bytes */ | |
956ee21a | 917 | dm_offset = CCP_SB_BYTES - AES_BLOCK_SIZE; |
63b94509 TL |
918 | ccp_get_dm_area(&ctx, dm_offset, xts->iv, 0, xts->iv_len); |
919 | ||
920 | e_dst: | |
921 | if (!in_place) | |
922 | ccp_free_data(&dst, cmd_q); | |
923 | ||
924 | e_src: | |
925 | ccp_free_data(&src, cmd_q); | |
926 | ||
927 | e_ctx: | |
928 | ccp_dm_free(&ctx); | |
929 | ||
930 | e_key: | |
931 | ccp_dm_free(&key); | |
932 | ||
933 | return ret; | |
934 | } | |
935 | ||
936 | static int ccp_run_sha_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd) | |
937 | { | |
938 | struct ccp_sha_engine *sha = &cmd->u.sha; | |
939 | struct ccp_dm_workarea ctx; | |
940 | struct ccp_data src; | |
941 | struct ccp_op op; | |
4b394a23 GH |
942 | unsigned int ioffset, ooffset; |
943 | unsigned int digest_size; | |
944 | int sb_count; | |
945 | const void *init; | |
946 | u64 block_size; | |
947 | int ctx_size; | |
63b94509 TL |
948 | int ret; |
949 | ||
4b394a23 GH |
950 | switch (sha->type) { |
951 | case CCP_SHA_TYPE_1: | |
952 | if (sha->ctx_len < SHA1_DIGEST_SIZE) | |
953 | return -EINVAL; | |
954 | block_size = SHA1_BLOCK_SIZE; | |
955 | break; | |
956 | case CCP_SHA_TYPE_224: | |
957 | if (sha->ctx_len < SHA224_DIGEST_SIZE) | |
958 | return -EINVAL; | |
959 | block_size = SHA224_BLOCK_SIZE; | |
960 | break; | |
961 | case CCP_SHA_TYPE_256: | |
962 | if (sha->ctx_len < SHA256_DIGEST_SIZE) | |
963 | return -EINVAL; | |
964 | block_size = SHA256_BLOCK_SIZE; | |
965 | break; | |
966 | default: | |
63b94509 | 967 | return -EINVAL; |
4b394a23 | 968 | } |
63b94509 TL |
969 | |
970 | if (!sha->ctx) | |
971 | return -EINVAL; | |
972 | ||
4b394a23 | 973 | if (!sha->final && (sha->src_len & (block_size - 1))) |
63b94509 TL |
974 | return -EINVAL; |
975 | ||
4b394a23 GH |
976 | /* The version 3 device can't handle zero-length input */ |
977 | if (cmd_q->ccp->vdata->version == CCP_VERSION(3, 0)) { | |
63b94509 | 978 | |
4b394a23 GH |
979 | if (!sha->src_len) { |
980 | unsigned int digest_len; | |
981 | const u8 *sha_zero; | |
63b94509 | 982 | |
4b394a23 GH |
983 | /* Not final, just return */ |
984 | if (!sha->final) | |
985 | return 0; | |
63b94509 | 986 | |
4b394a23 GH |
987 | /* CCP can't do a zero length sha operation so the |
988 | * caller must buffer the data. | |
989 | */ | |
990 | if (sha->msg_bits) | |
991 | return -EINVAL; | |
63b94509 | 992 | |
4b394a23 GH |
993 | /* The CCP cannot perform zero-length sha operations |
994 | * so the caller is required to buffer data for the | |
995 | * final operation. However, a sha operation for a | |
996 | * message with a total length of zero is valid so | |
997 | * known values are required to supply the result. | |
998 | */ | |
999 | switch (sha->type) { | |
1000 | case CCP_SHA_TYPE_1: | |
1001 | sha_zero = sha1_zero_message_hash; | |
1002 | digest_len = SHA1_DIGEST_SIZE; | |
1003 | break; | |
1004 | case CCP_SHA_TYPE_224: | |
1005 | sha_zero = sha224_zero_message_hash; | |
1006 | digest_len = SHA224_DIGEST_SIZE; | |
1007 | break; | |
1008 | case CCP_SHA_TYPE_256: | |
1009 | sha_zero = sha256_zero_message_hash; | |
1010 | digest_len = SHA256_DIGEST_SIZE; | |
1011 | break; | |
1012 | default: | |
1013 | return -EINVAL; | |
1014 | } | |
63b94509 | 1015 | |
4b394a23 GH |
1016 | scatterwalk_map_and_copy((void *)sha_zero, sha->ctx, 0, |
1017 | digest_len, 1); | |
1018 | ||
1019 | return 0; | |
1020 | } | |
63b94509 TL |
1021 | } |
1022 | ||
4b394a23 GH |
1023 | /* Set variables used throughout */ |
1024 | switch (sha->type) { | |
1025 | case CCP_SHA_TYPE_1: | |
1026 | digest_size = SHA1_DIGEST_SIZE; | |
1027 | init = (void *) ccp_sha1_init; | |
1028 | ctx_size = SHA1_DIGEST_SIZE; | |
1029 | sb_count = 1; | |
1030 | if (cmd_q->ccp->vdata->version != CCP_VERSION(3, 0)) | |
1031 | ooffset = ioffset = CCP_SB_BYTES - SHA1_DIGEST_SIZE; | |
1032 | else | |
1033 | ooffset = ioffset = 0; | |
1034 | break; | |
1035 | case CCP_SHA_TYPE_224: | |
1036 | digest_size = SHA224_DIGEST_SIZE; | |
1037 | init = (void *) ccp_sha224_init; | |
1038 | ctx_size = SHA256_DIGEST_SIZE; | |
1039 | sb_count = 1; | |
1040 | ioffset = 0; | |
1041 | if (cmd_q->ccp->vdata->version != CCP_VERSION(3, 0)) | |
1042 | ooffset = CCP_SB_BYTES - SHA224_DIGEST_SIZE; | |
1043 | else | |
1044 | ooffset = 0; | |
1045 | break; | |
1046 | case CCP_SHA_TYPE_256: | |
1047 | digest_size = SHA256_DIGEST_SIZE; | |
1048 | init = (void *) ccp_sha256_init; | |
1049 | ctx_size = SHA256_DIGEST_SIZE; | |
1050 | sb_count = 1; | |
1051 | ooffset = ioffset = 0; | |
1052 | break; | |
1053 | default: | |
1054 | ret = -EINVAL; | |
1055 | goto e_data; | |
1056 | } | |
63b94509 | 1057 | |
4b394a23 GH |
1058 | /* For zero-length plaintext the src pointer is ignored; |
1059 | * otherwise both parts must be valid | |
1060 | */ | |
1061 | if (sha->src_len && !sha->src) | |
1062 | return -EINVAL; | |
63b94509 TL |
1063 | |
1064 | memset(&op, 0, sizeof(op)); | |
1065 | op.cmd_q = cmd_q; | |
4b394a23 GH |
1066 | op.jobid = CCP_NEW_JOBID(cmd_q->ccp); |
1067 | op.sb_ctx = cmd_q->sb_ctx; /* Pre-allocated */ | |
63b94509 TL |
1068 | op.u.sha.type = sha->type; |
1069 | op.u.sha.msg_bits = sha->msg_bits; | |
1070 | ||
4b394a23 | 1071 | ret = ccp_init_dm_workarea(&ctx, cmd_q, sb_count * CCP_SB_BYTES, |
63b94509 TL |
1072 | DMA_BIDIRECTIONAL); |
1073 | if (ret) | |
1074 | return ret; | |
c11baa02 | 1075 | if (sha->first) { |
c11baa02 TL |
1076 | switch (sha->type) { |
1077 | case CCP_SHA_TYPE_1: | |
c11baa02 | 1078 | case CCP_SHA_TYPE_224: |
c11baa02 | 1079 | case CCP_SHA_TYPE_256: |
4b394a23 | 1080 | memcpy(ctx.address + ioffset, init, ctx_size); |
c11baa02 TL |
1081 | break; |
1082 | default: | |
1083 | ret = -EINVAL; | |
1084 | goto e_ctx; | |
1085 | } | |
8db88467 | 1086 | } else { |
4b394a23 GH |
1087 | /* Restore the context */ |
1088 | ccp_set_dm_area(&ctx, 0, sha->ctx, 0, | |
1089 | sb_count * CCP_SB_BYTES); | |
8db88467 | 1090 | } |
c11baa02 | 1091 | |
956ee21a GH |
1092 | ret = ccp_copy_to_sb(cmd_q, &ctx, op.jobid, op.sb_ctx, |
1093 | CCP_PASSTHRU_BYTESWAP_256BIT); | |
63b94509 TL |
1094 | if (ret) { |
1095 | cmd->engine_error = cmd_q->cmd_error; | |
1096 | goto e_ctx; | |
1097 | } | |
1098 | ||
4b394a23 GH |
1099 | if (sha->src) { |
1100 | /* Send data to the CCP SHA engine; block_size is set above */ | |
1101 | ret = ccp_init_data(&src, cmd_q, sha->src, sha->src_len, | |
1102 | block_size, DMA_TO_DEVICE); | |
1103 | if (ret) | |
1104 | goto e_ctx; | |
63b94509 | 1105 | |
4b394a23 GH |
1106 | while (src.sg_wa.bytes_left) { |
1107 | ccp_prepare_data(&src, NULL, &op, block_size, false); | |
1108 | if (sha->final && !src.sg_wa.bytes_left) | |
1109 | op.eom = 1; | |
1110 | ||
1111 | ret = cmd_q->ccp->vdata->perform->sha(&op); | |
1112 | if (ret) { | |
1113 | cmd->engine_error = cmd_q->cmd_error; | |
1114 | goto e_data; | |
1115 | } | |
63b94509 | 1116 | |
4b394a23 GH |
1117 | ccp_process_data(&src, NULL, &op); |
1118 | } | |
1119 | } else { | |
1120 | op.eom = 1; | |
a43eb985 | 1121 | ret = cmd_q->ccp->vdata->perform->sha(&op); |
63b94509 TL |
1122 | if (ret) { |
1123 | cmd->engine_error = cmd_q->cmd_error; | |
1124 | goto e_data; | |
1125 | } | |
63b94509 TL |
1126 | } |
1127 | ||
1128 | /* Retrieve the SHA context - convert from LE to BE using | |
1129 | * 32-byte (256-bit) byteswapping to BE | |
1130 | */ | |
956ee21a GH |
1131 | ret = ccp_copy_from_sb(cmd_q, &ctx, op.jobid, op.sb_ctx, |
1132 | CCP_PASSTHRU_BYTESWAP_256BIT); | |
63b94509 TL |
1133 | if (ret) { |
1134 | cmd->engine_error = cmd_q->cmd_error; | |
1135 | goto e_data; | |
1136 | } | |
1137 | ||
4b394a23 GH |
1138 | if (sha->final) { |
1139 | /* Finishing up, so get the digest */ | |
c11baa02 TL |
1140 | switch (sha->type) { |
1141 | case CCP_SHA_TYPE_1: | |
c11baa02 | 1142 | case CCP_SHA_TYPE_224: |
c11baa02 | 1143 | case CCP_SHA_TYPE_256: |
4b394a23 GH |
1144 | ccp_get_dm_area(&ctx, ooffset, |
1145 | sha->ctx, 0, | |
1146 | digest_size); | |
c11baa02 TL |
1147 | break; |
1148 | default: | |
1149 | ret = -EINVAL; | |
4b394a23 | 1150 | goto e_ctx; |
c11baa02 | 1151 | } |
4b394a23 GH |
1152 | } else { |
1153 | /* Stash the context */ | |
1154 | ccp_get_dm_area(&ctx, 0, sha->ctx, 0, | |
1155 | sb_count * CCP_SB_BYTES); | |
1156 | } | |
1157 | ||
1158 | if (sha->final && sha->opad) { | |
1159 | /* HMAC operation, recursively perform final SHA */ | |
1160 | struct ccp_cmd hmac_cmd; | |
1161 | struct scatterlist sg; | |
1162 | u8 *hmac_buf; | |
c11baa02 TL |
1163 | |
1164 | if (sha->opad_len != block_size) { | |
1165 | ret = -EINVAL; | |
1166 | goto e_data; | |
1167 | } | |
1168 | ||
1169 | hmac_buf = kmalloc(block_size + digest_size, GFP_KERNEL); | |
1170 | if (!hmac_buf) { | |
1171 | ret = -ENOMEM; | |
1172 | goto e_data; | |
1173 | } | |
1174 | sg_init_one(&sg, hmac_buf, block_size + digest_size); | |
1175 | ||
1176 | scatterwalk_map_and_copy(hmac_buf, sha->opad, 0, block_size, 0); | |
4b394a23 GH |
1177 | switch (sha->type) { |
1178 | case CCP_SHA_TYPE_1: | |
1179 | case CCP_SHA_TYPE_224: | |
1180 | case CCP_SHA_TYPE_256: | |
1181 | memcpy(hmac_buf + block_size, | |
1182 | ctx.address + ooffset, | |
1183 | digest_size); | |
1184 | break; | |
1185 | default: | |
1186 | ret = -EINVAL; | |
1187 | goto e_ctx; | |
1188 | } | |
c11baa02 TL |
1189 | |
1190 | memset(&hmac_cmd, 0, sizeof(hmac_cmd)); | |
1191 | hmac_cmd.engine = CCP_ENGINE_SHA; | |
1192 | hmac_cmd.u.sha.type = sha->type; | |
1193 | hmac_cmd.u.sha.ctx = sha->ctx; | |
1194 | hmac_cmd.u.sha.ctx_len = sha->ctx_len; | |
1195 | hmac_cmd.u.sha.src = &sg; | |
1196 | hmac_cmd.u.sha.src_len = block_size + digest_size; | |
1197 | hmac_cmd.u.sha.opad = NULL; | |
1198 | hmac_cmd.u.sha.opad_len = 0; | |
1199 | hmac_cmd.u.sha.first = 1; | |
1200 | hmac_cmd.u.sha.final = 1; | |
1201 | hmac_cmd.u.sha.msg_bits = (block_size + digest_size) << 3; | |
1202 | ||
1203 | ret = ccp_run_sha_cmd(cmd_q, &hmac_cmd); | |
1204 | if (ret) | |
1205 | cmd->engine_error = hmac_cmd.engine_error; | |
1206 | ||
1207 | kfree(hmac_buf); | |
1208 | } | |
1209 | ||
63b94509 | 1210 | e_data: |
4b394a23 GH |
1211 | if (sha->src) |
1212 | ccp_free_data(&src, cmd_q); | |
63b94509 TL |
1213 | |
1214 | e_ctx: | |
1215 | ccp_dm_free(&ctx); | |
1216 | ||
1217 | return ret; | |
1218 | } | |
1219 | ||
1220 | static int ccp_run_rsa_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd) | |
1221 | { | |
1222 | struct ccp_rsa_engine *rsa = &cmd->u.rsa; | |
1223 | struct ccp_dm_workarea exp, src; | |
1224 | struct ccp_data dst; | |
1225 | struct ccp_op op; | |
956ee21a | 1226 | unsigned int sb_count, i_len, o_len; |
63b94509 TL |
1227 | int ret; |
1228 | ||
1229 | if (rsa->key_size > CCP_RSA_MAX_WIDTH) | |
1230 | return -EINVAL; | |
1231 | ||
1232 | if (!rsa->exp || !rsa->mod || !rsa->src || !rsa->dst) | |
1233 | return -EINVAL; | |
1234 | ||
1235 | /* The RSA modulus must precede the message being acted upon, so | |
1236 | * it must be copied to a DMA area where the message and the | |
1237 | * modulus can be concatenated. Therefore the input buffer | |
1238 | * length required is twice the output buffer length (which | |
1239 | * must be a multiple of 256-bits). | |
1240 | */ | |
1241 | o_len = ((rsa->key_size + 255) / 256) * 32; | |
1242 | i_len = o_len * 2; | |
1243 | ||
956ee21a | 1244 | sb_count = o_len / CCP_SB_BYTES; |
63b94509 TL |
1245 | |
1246 | memset(&op, 0, sizeof(op)); | |
1247 | op.cmd_q = cmd_q; | |
1248 | op.jobid = ccp_gen_jobid(cmd_q->ccp); | |
58a690b7 GH |
1249 | op.sb_key = cmd_q->ccp->vdata->perform->sballoc(cmd_q, sb_count); |
1250 | ||
956ee21a | 1251 | if (!op.sb_key) |
63b94509 TL |
1252 | return -EIO; |
1253 | ||
956ee21a | 1254 | /* The RSA exponent may span multiple (32-byte) SB entries and must |
63b94509 TL |
1255 | * be in little endian format. Reverse copy each 32-byte chunk |
1256 | * of the exponent (En chunk to E0 chunk, E(n-1) chunk to E1 chunk) | |
1257 | * and each byte within that chunk and do not perform any byte swap | |
1258 | * operations on the passthru operation. | |
1259 | */ | |
1260 | ret = ccp_init_dm_workarea(&exp, cmd_q, o_len, DMA_TO_DEVICE); | |
1261 | if (ret) | |
956ee21a | 1262 | goto e_sb; |
63b94509 | 1263 | |
355eba5d | 1264 | ret = ccp_reverse_set_dm_area(&exp, rsa->exp, rsa->exp_len, |
956ee21a | 1265 | CCP_SB_BYTES, false); |
355eba5d TL |
1266 | if (ret) |
1267 | goto e_exp; | |
956ee21a GH |
1268 | ret = ccp_copy_to_sb(cmd_q, &exp, op.jobid, op.sb_key, |
1269 | CCP_PASSTHRU_BYTESWAP_NOOP); | |
63b94509 TL |
1270 | if (ret) { |
1271 | cmd->engine_error = cmd_q->cmd_error; | |
1272 | goto e_exp; | |
1273 | } | |
1274 | ||
1275 | /* Concatenate the modulus and the message. Both the modulus and | |
1276 | * the operands must be in little endian format. Since the input | |
1277 | * is in big endian format it must be converted. | |
1278 | */ | |
1279 | ret = ccp_init_dm_workarea(&src, cmd_q, i_len, DMA_TO_DEVICE); | |
1280 | if (ret) | |
1281 | goto e_exp; | |
1282 | ||
355eba5d | 1283 | ret = ccp_reverse_set_dm_area(&src, rsa->mod, rsa->mod_len, |
956ee21a | 1284 | CCP_SB_BYTES, false); |
355eba5d TL |
1285 | if (ret) |
1286 | goto e_src; | |
63b94509 | 1287 | src.address += o_len; /* Adjust the address for the copy operation */ |
355eba5d | 1288 | ret = ccp_reverse_set_dm_area(&src, rsa->src, rsa->src_len, |
956ee21a | 1289 | CCP_SB_BYTES, false); |
355eba5d TL |
1290 | if (ret) |
1291 | goto e_src; | |
63b94509 TL |
1292 | src.address -= o_len; /* Reset the address to original value */ |
1293 | ||
1294 | /* Prepare the output area for the operation */ | |
1295 | ret = ccp_init_data(&dst, cmd_q, rsa->dst, rsa->mod_len, | |
1296 | o_len, DMA_FROM_DEVICE); | |
1297 | if (ret) | |
1298 | goto e_src; | |
1299 | ||
1300 | op.soc = 1; | |
1301 | op.src.u.dma.address = src.dma.address; | |
1302 | op.src.u.dma.offset = 0; | |
1303 | op.src.u.dma.length = i_len; | |
1304 | op.dst.u.dma.address = dst.dm_wa.dma.address; | |
1305 | op.dst.u.dma.offset = 0; | |
1306 | op.dst.u.dma.length = o_len; | |
1307 | ||
1308 | op.u.rsa.mod_size = rsa->key_size; | |
1309 | op.u.rsa.input_len = i_len; | |
1310 | ||
a43eb985 | 1311 | ret = cmd_q->ccp->vdata->perform->rsa(&op); |
63b94509 TL |
1312 | if (ret) { |
1313 | cmd->engine_error = cmd_q->cmd_error; | |
1314 | goto e_dst; | |
1315 | } | |
1316 | ||
1317 | ccp_reverse_get_dm_area(&dst.dm_wa, rsa->dst, rsa->mod_len); | |
1318 | ||
1319 | e_dst: | |
1320 | ccp_free_data(&dst, cmd_q); | |
1321 | ||
1322 | e_src: | |
1323 | ccp_dm_free(&src); | |
1324 | ||
1325 | e_exp: | |
1326 | ccp_dm_free(&exp); | |
1327 | ||
956ee21a | 1328 | e_sb: |
58a690b7 | 1329 | cmd_q->ccp->vdata->perform->sbfree(cmd_q, op.sb_key, sb_count); |
63b94509 TL |
1330 | |
1331 | return ret; | |
1332 | } | |
1333 | ||
1334 | static int ccp_run_passthru_cmd(struct ccp_cmd_queue *cmd_q, | |
1335 | struct ccp_cmd *cmd) | |
1336 | { | |
1337 | struct ccp_passthru_engine *pt = &cmd->u.passthru; | |
1338 | struct ccp_dm_workarea mask; | |
1339 | struct ccp_data src, dst; | |
1340 | struct ccp_op op; | |
1341 | bool in_place = false; | |
1342 | unsigned int i; | |
4b394a23 | 1343 | int ret = 0; |
63b94509 TL |
1344 | |
1345 | if (!pt->final && (pt->src_len & (CCP_PASSTHRU_BLOCKSIZE - 1))) | |
1346 | return -EINVAL; | |
1347 | ||
1348 | if (!pt->src || !pt->dst) | |
1349 | return -EINVAL; | |
1350 | ||
1351 | if (pt->bit_mod != CCP_PASSTHRU_BITWISE_NOOP) { | |
1352 | if (pt->mask_len != CCP_PASSTHRU_MASKSIZE) | |
1353 | return -EINVAL; | |
1354 | if (!pt->mask) | |
1355 | return -EINVAL; | |
1356 | } | |
1357 | ||
956ee21a | 1358 | BUILD_BUG_ON(CCP_PASSTHRU_SB_COUNT != 1); |
63b94509 TL |
1359 | |
1360 | memset(&op, 0, sizeof(op)); | |
1361 | op.cmd_q = cmd_q; | |
4b394a23 | 1362 | op.jobid = CCP_NEW_JOBID(cmd_q->ccp); |
63b94509 TL |
1363 | |
1364 | if (pt->bit_mod != CCP_PASSTHRU_BITWISE_NOOP) { | |
1365 | /* Load the mask */ | |
956ee21a | 1366 | op.sb_key = cmd_q->sb_key; |
63b94509 TL |
1367 | |
1368 | ret = ccp_init_dm_workarea(&mask, cmd_q, | |
956ee21a GH |
1369 | CCP_PASSTHRU_SB_COUNT * |
1370 | CCP_SB_BYTES, | |
63b94509 TL |
1371 | DMA_TO_DEVICE); |
1372 | if (ret) | |
1373 | return ret; | |
1374 | ||
1375 | ccp_set_dm_area(&mask, 0, pt->mask, 0, pt->mask_len); | |
956ee21a GH |
1376 | ret = ccp_copy_to_sb(cmd_q, &mask, op.jobid, op.sb_key, |
1377 | CCP_PASSTHRU_BYTESWAP_NOOP); | |
63b94509 TL |
1378 | if (ret) { |
1379 | cmd->engine_error = cmd_q->cmd_error; | |
1380 | goto e_mask; | |
1381 | } | |
1382 | } | |
1383 | ||
1384 | /* Prepare the input and output data workareas. For in-place | |
1385 | * operations we need to set the dma direction to BIDIRECTIONAL | |
1386 | * and copy the src workarea to the dst workarea. | |
1387 | */ | |
1388 | if (sg_virt(pt->src) == sg_virt(pt->dst)) | |
1389 | in_place = true; | |
1390 | ||
1391 | ret = ccp_init_data(&src, cmd_q, pt->src, pt->src_len, | |
1392 | CCP_PASSTHRU_MASKSIZE, | |
1393 | in_place ? DMA_BIDIRECTIONAL : DMA_TO_DEVICE); | |
1394 | if (ret) | |
1395 | goto e_mask; | |
1396 | ||
8db88467 | 1397 | if (in_place) { |
63b94509 | 1398 | dst = src; |
8db88467 | 1399 | } else { |
63b94509 TL |
1400 | ret = ccp_init_data(&dst, cmd_q, pt->dst, pt->src_len, |
1401 | CCP_PASSTHRU_MASKSIZE, DMA_FROM_DEVICE); | |
1402 | if (ret) | |
1403 | goto e_src; | |
1404 | } | |
1405 | ||
1406 | /* Send data to the CCP Passthru engine | |
1407 | * Because the CCP engine works on a single source and destination | |
1408 | * dma address at a time, each entry in the source scatterlist | |
1409 | * (after the dma_map_sg call) must be less than or equal to the | |
1410 | * (remaining) length in the destination scatterlist entry and the | |
1411 | * length must be a multiple of CCP_PASSTHRU_BLOCKSIZE | |
1412 | */ | |
1413 | dst.sg_wa.sg_used = 0; | |
1414 | for (i = 1; i <= src.sg_wa.dma_count; i++) { | |
1415 | if (!dst.sg_wa.sg || | |
1416 | (dst.sg_wa.sg->length < src.sg_wa.sg->length)) { | |
1417 | ret = -EINVAL; | |
1418 | goto e_dst; | |
1419 | } | |
1420 | ||
1421 | if (i == src.sg_wa.dma_count) { | |
1422 | op.eom = 1; | |
1423 | op.soc = 1; | |
1424 | } | |
1425 | ||
1426 | op.src.type = CCP_MEMTYPE_SYSTEM; | |
1427 | op.src.u.dma.address = sg_dma_address(src.sg_wa.sg); | |
1428 | op.src.u.dma.offset = 0; | |
1429 | op.src.u.dma.length = sg_dma_len(src.sg_wa.sg); | |
1430 | ||
1431 | op.dst.type = CCP_MEMTYPE_SYSTEM; | |
1432 | op.dst.u.dma.address = sg_dma_address(dst.sg_wa.sg); | |
80e84c16 DJ |
1433 | op.dst.u.dma.offset = dst.sg_wa.sg_used; |
1434 | op.dst.u.dma.length = op.src.u.dma.length; | |
63b94509 | 1435 | |
a43eb985 | 1436 | ret = cmd_q->ccp->vdata->perform->passthru(&op); |
63b94509 TL |
1437 | if (ret) { |
1438 | cmd->engine_error = cmd_q->cmd_error; | |
1439 | goto e_dst; | |
1440 | } | |
1441 | ||
1442 | dst.sg_wa.sg_used += src.sg_wa.sg->length; | |
1443 | if (dst.sg_wa.sg_used == dst.sg_wa.sg->length) { | |
1444 | dst.sg_wa.sg = sg_next(dst.sg_wa.sg); | |
1445 | dst.sg_wa.sg_used = 0; | |
1446 | } | |
1447 | src.sg_wa.sg = sg_next(src.sg_wa.sg); | |
1448 | } | |
1449 | ||
1450 | e_dst: | |
1451 | if (!in_place) | |
1452 | ccp_free_data(&dst, cmd_q); | |
1453 | ||
1454 | e_src: | |
1455 | ccp_free_data(&src, cmd_q); | |
1456 | ||
1457 | e_mask: | |
1458 | if (pt->bit_mod != CCP_PASSTHRU_BITWISE_NOOP) | |
1459 | ccp_dm_free(&mask); | |
1460 | ||
1461 | return ret; | |
1462 | } | |
1463 | ||
58ea8abf GH |
1464 | static int ccp_run_passthru_nomap_cmd(struct ccp_cmd_queue *cmd_q, |
1465 | struct ccp_cmd *cmd) | |
1466 | { | |
1467 | struct ccp_passthru_nomap_engine *pt = &cmd->u.passthru_nomap; | |
1468 | struct ccp_dm_workarea mask; | |
1469 | struct ccp_op op; | |
1470 | int ret; | |
1471 | ||
1472 | if (!pt->final && (pt->src_len & (CCP_PASSTHRU_BLOCKSIZE - 1))) | |
1473 | return -EINVAL; | |
1474 | ||
1475 | if (!pt->src_dma || !pt->dst_dma) | |
1476 | return -EINVAL; | |
1477 | ||
1478 | if (pt->bit_mod != CCP_PASSTHRU_BITWISE_NOOP) { | |
1479 | if (pt->mask_len != CCP_PASSTHRU_MASKSIZE) | |
1480 | return -EINVAL; | |
1481 | if (!pt->mask) | |
1482 | return -EINVAL; | |
1483 | } | |
1484 | ||
956ee21a | 1485 | BUILD_BUG_ON(CCP_PASSTHRU_SB_COUNT != 1); |
58ea8abf GH |
1486 | |
1487 | memset(&op, 0, sizeof(op)); | |
1488 | op.cmd_q = cmd_q; | |
1489 | op.jobid = ccp_gen_jobid(cmd_q->ccp); | |
1490 | ||
1491 | if (pt->bit_mod != CCP_PASSTHRU_BITWISE_NOOP) { | |
1492 | /* Load the mask */ | |
956ee21a | 1493 | op.sb_key = cmd_q->sb_key; |
58ea8abf GH |
1494 | |
1495 | mask.length = pt->mask_len; | |
1496 | mask.dma.address = pt->mask; | |
1497 | mask.dma.length = pt->mask_len; | |
1498 | ||
956ee21a | 1499 | ret = ccp_copy_to_sb(cmd_q, &mask, op.jobid, op.sb_key, |
58ea8abf GH |
1500 | CCP_PASSTHRU_BYTESWAP_NOOP); |
1501 | if (ret) { | |
1502 | cmd->engine_error = cmd_q->cmd_error; | |
1503 | return ret; | |
1504 | } | |
1505 | } | |
1506 | ||
1507 | /* Send data to the CCP Passthru engine */ | |
1508 | op.eom = 1; | |
1509 | op.soc = 1; | |
1510 | ||
1511 | op.src.type = CCP_MEMTYPE_SYSTEM; | |
1512 | op.src.u.dma.address = pt->src_dma; | |
1513 | op.src.u.dma.offset = 0; | |
1514 | op.src.u.dma.length = pt->src_len; | |
1515 | ||
1516 | op.dst.type = CCP_MEMTYPE_SYSTEM; | |
1517 | op.dst.u.dma.address = pt->dst_dma; | |
1518 | op.dst.u.dma.offset = 0; | |
1519 | op.dst.u.dma.length = pt->src_len; | |
1520 | ||
a43eb985 | 1521 | ret = cmd_q->ccp->vdata->perform->passthru(&op); |
58ea8abf GH |
1522 | if (ret) |
1523 | cmd->engine_error = cmd_q->cmd_error; | |
1524 | ||
1525 | return ret; | |
1526 | } | |
1527 | ||
63b94509 TL |
1528 | static int ccp_run_ecc_mm_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd) |
1529 | { | |
1530 | struct ccp_ecc_engine *ecc = &cmd->u.ecc; | |
1531 | struct ccp_dm_workarea src, dst; | |
1532 | struct ccp_op op; | |
1533 | int ret; | |
1534 | u8 *save; | |
1535 | ||
1536 | if (!ecc->u.mm.operand_1 || | |
1537 | (ecc->u.mm.operand_1_len > CCP_ECC_MODULUS_BYTES)) | |
1538 | return -EINVAL; | |
1539 | ||
1540 | if (ecc->function != CCP_ECC_FUNCTION_MINV_384BIT) | |
1541 | if (!ecc->u.mm.operand_2 || | |
1542 | (ecc->u.mm.operand_2_len > CCP_ECC_MODULUS_BYTES)) | |
1543 | return -EINVAL; | |
1544 | ||
1545 | if (!ecc->u.mm.result || | |
1546 | (ecc->u.mm.result_len < CCP_ECC_MODULUS_BYTES)) | |
1547 | return -EINVAL; | |
1548 | ||
1549 | memset(&op, 0, sizeof(op)); | |
1550 | op.cmd_q = cmd_q; | |
4b394a23 | 1551 | op.jobid = CCP_NEW_JOBID(cmd_q->ccp); |
63b94509 TL |
1552 | |
1553 | /* Concatenate the modulus and the operands. Both the modulus and | |
1554 | * the operands must be in little endian format. Since the input | |
1555 | * is in big endian format it must be converted and placed in a | |
1556 | * fixed length buffer. | |
1557 | */ | |
1558 | ret = ccp_init_dm_workarea(&src, cmd_q, CCP_ECC_SRC_BUF_SIZE, | |
1559 | DMA_TO_DEVICE); | |
1560 | if (ret) | |
1561 | return ret; | |
1562 | ||
1563 | /* Save the workarea address since it is updated in order to perform | |
1564 | * the concatenation | |
1565 | */ | |
1566 | save = src.address; | |
1567 | ||
1568 | /* Copy the ECC modulus */ | |
355eba5d TL |
1569 | ret = ccp_reverse_set_dm_area(&src, ecc->mod, ecc->mod_len, |
1570 | CCP_ECC_OPERAND_SIZE, false); | |
1571 | if (ret) | |
1572 | goto e_src; | |
63b94509 TL |
1573 | src.address += CCP_ECC_OPERAND_SIZE; |
1574 | ||
1575 | /* Copy the first operand */ | |
355eba5d TL |
1576 | ret = ccp_reverse_set_dm_area(&src, ecc->u.mm.operand_1, |
1577 | ecc->u.mm.operand_1_len, | |
1578 | CCP_ECC_OPERAND_SIZE, false); | |
1579 | if (ret) | |
1580 | goto e_src; | |
63b94509 TL |
1581 | src.address += CCP_ECC_OPERAND_SIZE; |
1582 | ||
1583 | if (ecc->function != CCP_ECC_FUNCTION_MINV_384BIT) { | |
1584 | /* Copy the second operand */ | |
355eba5d TL |
1585 | ret = ccp_reverse_set_dm_area(&src, ecc->u.mm.operand_2, |
1586 | ecc->u.mm.operand_2_len, | |
1587 | CCP_ECC_OPERAND_SIZE, false); | |
1588 | if (ret) | |
1589 | goto e_src; | |
63b94509 TL |
1590 | src.address += CCP_ECC_OPERAND_SIZE; |
1591 | } | |
1592 | ||
1593 | /* Restore the workarea address */ | |
1594 | src.address = save; | |
1595 | ||
1596 | /* Prepare the output area for the operation */ | |
1597 | ret = ccp_init_dm_workarea(&dst, cmd_q, CCP_ECC_DST_BUF_SIZE, | |
1598 | DMA_FROM_DEVICE); | |
1599 | if (ret) | |
1600 | goto e_src; | |
1601 | ||
1602 | op.soc = 1; | |
1603 | op.src.u.dma.address = src.dma.address; | |
1604 | op.src.u.dma.offset = 0; | |
1605 | op.src.u.dma.length = src.length; | |
1606 | op.dst.u.dma.address = dst.dma.address; | |
1607 | op.dst.u.dma.offset = 0; | |
1608 | op.dst.u.dma.length = dst.length; | |
1609 | ||
1610 | op.u.ecc.function = cmd->u.ecc.function; | |
1611 | ||
a43eb985 | 1612 | ret = cmd_q->ccp->vdata->perform->ecc(&op); |
63b94509 TL |
1613 | if (ret) { |
1614 | cmd->engine_error = cmd_q->cmd_error; | |
1615 | goto e_dst; | |
1616 | } | |
1617 | ||
1618 | ecc->ecc_result = le16_to_cpup( | |
1619 | (const __le16 *)(dst.address + CCP_ECC_RESULT_OFFSET)); | |
1620 | if (!(ecc->ecc_result & CCP_ECC_RESULT_SUCCESS)) { | |
1621 | ret = -EIO; | |
1622 | goto e_dst; | |
1623 | } | |
1624 | ||
1625 | /* Save the ECC result */ | |
1626 | ccp_reverse_get_dm_area(&dst, ecc->u.mm.result, CCP_ECC_MODULUS_BYTES); | |
1627 | ||
1628 | e_dst: | |
1629 | ccp_dm_free(&dst); | |
1630 | ||
1631 | e_src: | |
1632 | ccp_dm_free(&src); | |
1633 | ||
1634 | return ret; | |
1635 | } | |
1636 | ||
1637 | static int ccp_run_ecc_pm_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd) | |
1638 | { | |
1639 | struct ccp_ecc_engine *ecc = &cmd->u.ecc; | |
1640 | struct ccp_dm_workarea src, dst; | |
1641 | struct ccp_op op; | |
1642 | int ret; | |
1643 | u8 *save; | |
1644 | ||
1645 | if (!ecc->u.pm.point_1.x || | |
1646 | (ecc->u.pm.point_1.x_len > CCP_ECC_MODULUS_BYTES) || | |
1647 | !ecc->u.pm.point_1.y || | |
1648 | (ecc->u.pm.point_1.y_len > CCP_ECC_MODULUS_BYTES)) | |
1649 | return -EINVAL; | |
1650 | ||
1651 | if (ecc->function == CCP_ECC_FUNCTION_PADD_384BIT) { | |
1652 | if (!ecc->u.pm.point_2.x || | |
1653 | (ecc->u.pm.point_2.x_len > CCP_ECC_MODULUS_BYTES) || | |
1654 | !ecc->u.pm.point_2.y || | |
1655 | (ecc->u.pm.point_2.y_len > CCP_ECC_MODULUS_BYTES)) | |
1656 | return -EINVAL; | |
1657 | } else { | |
1658 | if (!ecc->u.pm.domain_a || | |
1659 | (ecc->u.pm.domain_a_len > CCP_ECC_MODULUS_BYTES)) | |
1660 | return -EINVAL; | |
1661 | ||
1662 | if (ecc->function == CCP_ECC_FUNCTION_PMUL_384BIT) | |
1663 | if (!ecc->u.pm.scalar || | |
1664 | (ecc->u.pm.scalar_len > CCP_ECC_MODULUS_BYTES)) | |
1665 | return -EINVAL; | |
1666 | } | |
1667 | ||
1668 | if (!ecc->u.pm.result.x || | |
1669 | (ecc->u.pm.result.x_len < CCP_ECC_MODULUS_BYTES) || | |
1670 | !ecc->u.pm.result.y || | |
1671 | (ecc->u.pm.result.y_len < CCP_ECC_MODULUS_BYTES)) | |
1672 | return -EINVAL; | |
1673 | ||
1674 | memset(&op, 0, sizeof(op)); | |
1675 | op.cmd_q = cmd_q; | |
4b394a23 | 1676 | op.jobid = CCP_NEW_JOBID(cmd_q->ccp); |
63b94509 TL |
1677 | |
1678 | /* Concatenate the modulus and the operands. Both the modulus and | |
1679 | * the operands must be in little endian format. Since the input | |
1680 | * is in big endian format it must be converted and placed in a | |
1681 | * fixed length buffer. | |
1682 | */ | |
1683 | ret = ccp_init_dm_workarea(&src, cmd_q, CCP_ECC_SRC_BUF_SIZE, | |
1684 | DMA_TO_DEVICE); | |
1685 | if (ret) | |
1686 | return ret; | |
1687 | ||
1688 | /* Save the workarea address since it is updated in order to perform | |
1689 | * the concatenation | |
1690 | */ | |
1691 | save = src.address; | |
1692 | ||
1693 | /* Copy the ECC modulus */ | |
355eba5d TL |
1694 | ret = ccp_reverse_set_dm_area(&src, ecc->mod, ecc->mod_len, |
1695 | CCP_ECC_OPERAND_SIZE, false); | |
1696 | if (ret) | |
1697 | goto e_src; | |
63b94509 TL |
1698 | src.address += CCP_ECC_OPERAND_SIZE; |
1699 | ||
1700 | /* Copy the first point X and Y coordinate */ | |
355eba5d TL |
1701 | ret = ccp_reverse_set_dm_area(&src, ecc->u.pm.point_1.x, |
1702 | ecc->u.pm.point_1.x_len, | |
1703 | CCP_ECC_OPERAND_SIZE, false); | |
1704 | if (ret) | |
1705 | goto e_src; | |
63b94509 | 1706 | src.address += CCP_ECC_OPERAND_SIZE; |
355eba5d TL |
1707 | ret = ccp_reverse_set_dm_area(&src, ecc->u.pm.point_1.y, |
1708 | ecc->u.pm.point_1.y_len, | |
1709 | CCP_ECC_OPERAND_SIZE, false); | |
1710 | if (ret) | |
1711 | goto e_src; | |
63b94509 TL |
1712 | src.address += CCP_ECC_OPERAND_SIZE; |
1713 | ||
4b394a23 | 1714 | /* Set the first point Z coordinate to 1 */ |
8db88467 | 1715 | *src.address = 0x01; |
63b94509 TL |
1716 | src.address += CCP_ECC_OPERAND_SIZE; |
1717 | ||
1718 | if (ecc->function == CCP_ECC_FUNCTION_PADD_384BIT) { | |
1719 | /* Copy the second point X and Y coordinate */ | |
355eba5d TL |
1720 | ret = ccp_reverse_set_dm_area(&src, ecc->u.pm.point_2.x, |
1721 | ecc->u.pm.point_2.x_len, | |
1722 | CCP_ECC_OPERAND_SIZE, false); | |
1723 | if (ret) | |
1724 | goto e_src; | |
63b94509 | 1725 | src.address += CCP_ECC_OPERAND_SIZE; |
355eba5d TL |
1726 | ret = ccp_reverse_set_dm_area(&src, ecc->u.pm.point_2.y, |
1727 | ecc->u.pm.point_2.y_len, | |
1728 | CCP_ECC_OPERAND_SIZE, false); | |
1729 | if (ret) | |
1730 | goto e_src; | |
63b94509 TL |
1731 | src.address += CCP_ECC_OPERAND_SIZE; |
1732 | ||
4b394a23 | 1733 | /* Set the second point Z coordinate to 1 */ |
8db88467 | 1734 | *src.address = 0x01; |
63b94509 TL |
1735 | src.address += CCP_ECC_OPERAND_SIZE; |
1736 | } else { | |
1737 | /* Copy the Domain "a" parameter */ | |
355eba5d TL |
1738 | ret = ccp_reverse_set_dm_area(&src, ecc->u.pm.domain_a, |
1739 | ecc->u.pm.domain_a_len, | |
1740 | CCP_ECC_OPERAND_SIZE, false); | |
1741 | if (ret) | |
1742 | goto e_src; | |
63b94509 TL |
1743 | src.address += CCP_ECC_OPERAND_SIZE; |
1744 | ||
1745 | if (ecc->function == CCP_ECC_FUNCTION_PMUL_384BIT) { | |
1746 | /* Copy the scalar value */ | |
355eba5d TL |
1747 | ret = ccp_reverse_set_dm_area(&src, ecc->u.pm.scalar, |
1748 | ecc->u.pm.scalar_len, | |
1749 | CCP_ECC_OPERAND_SIZE, | |
1750 | false); | |
1751 | if (ret) | |
1752 | goto e_src; | |
63b94509 TL |
1753 | src.address += CCP_ECC_OPERAND_SIZE; |
1754 | } | |
1755 | } | |
1756 | ||
1757 | /* Restore the workarea address */ | |
1758 | src.address = save; | |
1759 | ||
1760 | /* Prepare the output area for the operation */ | |
1761 | ret = ccp_init_dm_workarea(&dst, cmd_q, CCP_ECC_DST_BUF_SIZE, | |
1762 | DMA_FROM_DEVICE); | |
1763 | if (ret) | |
1764 | goto e_src; | |
1765 | ||
1766 | op.soc = 1; | |
1767 | op.src.u.dma.address = src.dma.address; | |
1768 | op.src.u.dma.offset = 0; | |
1769 | op.src.u.dma.length = src.length; | |
1770 | op.dst.u.dma.address = dst.dma.address; | |
1771 | op.dst.u.dma.offset = 0; | |
1772 | op.dst.u.dma.length = dst.length; | |
1773 | ||
1774 | op.u.ecc.function = cmd->u.ecc.function; | |
1775 | ||
a43eb985 | 1776 | ret = cmd_q->ccp->vdata->perform->ecc(&op); |
63b94509 TL |
1777 | if (ret) { |
1778 | cmd->engine_error = cmd_q->cmd_error; | |
1779 | goto e_dst; | |
1780 | } | |
1781 | ||
1782 | ecc->ecc_result = le16_to_cpup( | |
1783 | (const __le16 *)(dst.address + CCP_ECC_RESULT_OFFSET)); | |
1784 | if (!(ecc->ecc_result & CCP_ECC_RESULT_SUCCESS)) { | |
1785 | ret = -EIO; | |
1786 | goto e_dst; | |
1787 | } | |
1788 | ||
1789 | /* Save the workarea address since it is updated as we walk through | |
1790 | * to copy the point math result | |
1791 | */ | |
1792 | save = dst.address; | |
1793 | ||
1794 | /* Save the ECC result X and Y coordinates */ | |
1795 | ccp_reverse_get_dm_area(&dst, ecc->u.pm.result.x, | |
1796 | CCP_ECC_MODULUS_BYTES); | |
1797 | dst.address += CCP_ECC_OUTPUT_SIZE; | |
1798 | ccp_reverse_get_dm_area(&dst, ecc->u.pm.result.y, | |
1799 | CCP_ECC_MODULUS_BYTES); | |
1800 | dst.address += CCP_ECC_OUTPUT_SIZE; | |
1801 | ||
1802 | /* Restore the workarea address */ | |
1803 | dst.address = save; | |
1804 | ||
1805 | e_dst: | |
1806 | ccp_dm_free(&dst); | |
1807 | ||
1808 | e_src: | |
1809 | ccp_dm_free(&src); | |
1810 | ||
1811 | return ret; | |
1812 | } | |
1813 | ||
1814 | static int ccp_run_ecc_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd) | |
1815 | { | |
1816 | struct ccp_ecc_engine *ecc = &cmd->u.ecc; | |
1817 | ||
1818 | ecc->ecc_result = 0; | |
1819 | ||
1820 | if (!ecc->mod || | |
1821 | (ecc->mod_len > CCP_ECC_MODULUS_BYTES)) | |
1822 | return -EINVAL; | |
1823 | ||
1824 | switch (ecc->function) { | |
1825 | case CCP_ECC_FUNCTION_MMUL_384BIT: | |
1826 | case CCP_ECC_FUNCTION_MADD_384BIT: | |
1827 | case CCP_ECC_FUNCTION_MINV_384BIT: | |
1828 | return ccp_run_ecc_mm_cmd(cmd_q, cmd); | |
1829 | ||
1830 | case CCP_ECC_FUNCTION_PADD_384BIT: | |
1831 | case CCP_ECC_FUNCTION_PMUL_384BIT: | |
1832 | case CCP_ECC_FUNCTION_PDBL_384BIT: | |
1833 | return ccp_run_ecc_pm_cmd(cmd_q, cmd); | |
1834 | ||
1835 | default: | |
1836 | return -EINVAL; | |
1837 | } | |
1838 | } | |
1839 | ||
1840 | int ccp_run_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd) | |
1841 | { | |
1842 | int ret; | |
1843 | ||
1844 | cmd->engine_error = 0; | |
1845 | cmd_q->cmd_error = 0; | |
1846 | cmd_q->int_rcvd = 0; | |
bb4e89b3 | 1847 | cmd_q->free_slots = cmd_q->ccp->vdata->perform->get_free_slots(cmd_q); |
63b94509 TL |
1848 | |
1849 | switch (cmd->engine) { | |
1850 | case CCP_ENGINE_AES: | |
1851 | ret = ccp_run_aes_cmd(cmd_q, cmd); | |
1852 | break; | |
1853 | case CCP_ENGINE_XTS_AES_128: | |
1854 | ret = ccp_run_xts_aes_cmd(cmd_q, cmd); | |
1855 | break; | |
1856 | case CCP_ENGINE_SHA: | |
1857 | ret = ccp_run_sha_cmd(cmd_q, cmd); | |
1858 | break; | |
1859 | case CCP_ENGINE_RSA: | |
1860 | ret = ccp_run_rsa_cmd(cmd_q, cmd); | |
1861 | break; | |
1862 | case CCP_ENGINE_PASSTHRU: | |
58ea8abf GH |
1863 | if (cmd->flags & CCP_CMD_PASSTHRU_NO_DMA_MAP) |
1864 | ret = ccp_run_passthru_nomap_cmd(cmd_q, cmd); | |
1865 | else | |
1866 | ret = ccp_run_passthru_cmd(cmd_q, cmd); | |
63b94509 TL |
1867 | break; |
1868 | case CCP_ENGINE_ECC: | |
1869 | ret = ccp_run_ecc_cmd(cmd_q, cmd); | |
1870 | break; | |
1871 | default: | |
1872 | ret = -EINVAL; | |
1873 | } | |
1874 | ||
1875 | return ret; | |
1876 | } |