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Commit | Line | Data |
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8c419778 TA |
1 | /* |
2 | * caam - Freescale FSL CAAM support for Public Key Cryptography | |
3 | * | |
4 | * Copyright 2016 Freescale Semiconductor, Inc. | |
5 | * | |
6 | * There is no Shared Descriptor for PKC so that the Job Descriptor must carry | |
7 | * all the desired key parameters, input and output pointers. | |
8 | */ | |
9 | #include "compat.h" | |
10 | #include "regs.h" | |
11 | #include "intern.h" | |
12 | #include "jr.h" | |
13 | #include "error.h" | |
14 | #include "desc_constr.h" | |
15 | #include "sg_sw_sec4.h" | |
16 | #include "caampkc.h" | |
17 | ||
18 | #define DESC_RSA_PUB_LEN (2 * CAAM_CMD_SZ + sizeof(struct rsa_pub_pdb)) | |
19 | #define DESC_RSA_PRIV_F1_LEN (2 * CAAM_CMD_SZ + \ | |
20 | sizeof(struct rsa_priv_f1_pdb)) | |
52e26d77 RA |
21 | #define DESC_RSA_PRIV_F2_LEN (2 * CAAM_CMD_SZ + \ |
22 | sizeof(struct rsa_priv_f2_pdb)) | |
4a651b12 RA |
23 | #define DESC_RSA_PRIV_F3_LEN (2 * CAAM_CMD_SZ + \ |
24 | sizeof(struct rsa_priv_f3_pdb)) | |
8c419778 TA |
25 | |
26 | static void rsa_io_unmap(struct device *dev, struct rsa_edesc *edesc, | |
27 | struct akcipher_request *req) | |
28 | { | |
29 | dma_unmap_sg(dev, req->dst, edesc->dst_nents, DMA_FROM_DEVICE); | |
30 | dma_unmap_sg(dev, req->src, edesc->src_nents, DMA_TO_DEVICE); | |
31 | ||
32 | if (edesc->sec4_sg_bytes) | |
33 | dma_unmap_single(dev, edesc->sec4_sg_dma, edesc->sec4_sg_bytes, | |
34 | DMA_TO_DEVICE); | |
35 | } | |
36 | ||
37 | static void rsa_pub_unmap(struct device *dev, struct rsa_edesc *edesc, | |
38 | struct akcipher_request *req) | |
39 | { | |
40 | struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); | |
41 | struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); | |
42 | struct caam_rsa_key *key = &ctx->key; | |
43 | struct rsa_pub_pdb *pdb = &edesc->pdb.pub; | |
44 | ||
45 | dma_unmap_single(dev, pdb->n_dma, key->n_sz, DMA_TO_DEVICE); | |
46 | dma_unmap_single(dev, pdb->e_dma, key->e_sz, DMA_TO_DEVICE); | |
47 | } | |
48 | ||
49 | static void rsa_priv_f1_unmap(struct device *dev, struct rsa_edesc *edesc, | |
50 | struct akcipher_request *req) | |
51 | { | |
52 | struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); | |
53 | struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); | |
54 | struct caam_rsa_key *key = &ctx->key; | |
55 | struct rsa_priv_f1_pdb *pdb = &edesc->pdb.priv_f1; | |
56 | ||
57 | dma_unmap_single(dev, pdb->n_dma, key->n_sz, DMA_TO_DEVICE); | |
58 | dma_unmap_single(dev, pdb->d_dma, key->d_sz, DMA_TO_DEVICE); | |
59 | } | |
60 | ||
52e26d77 RA |
61 | static void rsa_priv_f2_unmap(struct device *dev, struct rsa_edesc *edesc, |
62 | struct akcipher_request *req) | |
63 | { | |
64 | struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); | |
65 | struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); | |
66 | struct caam_rsa_key *key = &ctx->key; | |
67 | struct rsa_priv_f2_pdb *pdb = &edesc->pdb.priv_f2; | |
68 | size_t p_sz = key->p_sz; | |
4bffaab3 | 69 | size_t q_sz = key->q_sz; |
52e26d77 RA |
70 | |
71 | dma_unmap_single(dev, pdb->d_dma, key->d_sz, DMA_TO_DEVICE); | |
72 | dma_unmap_single(dev, pdb->p_dma, p_sz, DMA_TO_DEVICE); | |
73 | dma_unmap_single(dev, pdb->q_dma, q_sz, DMA_TO_DEVICE); | |
f1bf9e60 HG |
74 | dma_unmap_single(dev, pdb->tmp1_dma, p_sz, DMA_BIDIRECTIONAL); |
75 | dma_unmap_single(dev, pdb->tmp2_dma, q_sz, DMA_BIDIRECTIONAL); | |
52e26d77 RA |
76 | } |
77 | ||
4a651b12 RA |
78 | static void rsa_priv_f3_unmap(struct device *dev, struct rsa_edesc *edesc, |
79 | struct akcipher_request *req) | |
80 | { | |
81 | struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); | |
82 | struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); | |
83 | struct caam_rsa_key *key = &ctx->key; | |
84 | struct rsa_priv_f3_pdb *pdb = &edesc->pdb.priv_f3; | |
85 | size_t p_sz = key->p_sz; | |
4bffaab3 | 86 | size_t q_sz = key->q_sz; |
4a651b12 RA |
87 | |
88 | dma_unmap_single(dev, pdb->p_dma, p_sz, DMA_TO_DEVICE); | |
89 | dma_unmap_single(dev, pdb->q_dma, q_sz, DMA_TO_DEVICE); | |
90 | dma_unmap_single(dev, pdb->dp_dma, p_sz, DMA_TO_DEVICE); | |
91 | dma_unmap_single(dev, pdb->dq_dma, q_sz, DMA_TO_DEVICE); | |
92 | dma_unmap_single(dev, pdb->c_dma, p_sz, DMA_TO_DEVICE); | |
f1bf9e60 HG |
93 | dma_unmap_single(dev, pdb->tmp1_dma, p_sz, DMA_BIDIRECTIONAL); |
94 | dma_unmap_single(dev, pdb->tmp2_dma, q_sz, DMA_BIDIRECTIONAL); | |
4a651b12 RA |
95 | } |
96 | ||
8c419778 TA |
97 | /* RSA Job Completion handler */ |
98 | static void rsa_pub_done(struct device *dev, u32 *desc, u32 err, void *context) | |
99 | { | |
100 | struct akcipher_request *req = context; | |
101 | struct rsa_edesc *edesc; | |
102 | ||
103 | if (err) | |
104 | caam_jr_strstatus(dev, err); | |
105 | ||
106 | edesc = container_of(desc, struct rsa_edesc, hw_desc[0]); | |
107 | ||
108 | rsa_pub_unmap(dev, edesc, req); | |
109 | rsa_io_unmap(dev, edesc, req); | |
110 | kfree(edesc); | |
111 | ||
112 | akcipher_request_complete(req, err); | |
113 | } | |
114 | ||
115 | static void rsa_priv_f1_done(struct device *dev, u32 *desc, u32 err, | |
116 | void *context) | |
117 | { | |
118 | struct akcipher_request *req = context; | |
119 | struct rsa_edesc *edesc; | |
120 | ||
121 | if (err) | |
122 | caam_jr_strstatus(dev, err); | |
123 | ||
124 | edesc = container_of(desc, struct rsa_edesc, hw_desc[0]); | |
125 | ||
126 | rsa_priv_f1_unmap(dev, edesc, req); | |
127 | rsa_io_unmap(dev, edesc, req); | |
128 | kfree(edesc); | |
129 | ||
130 | akcipher_request_complete(req, err); | |
131 | } | |
132 | ||
52e26d77 RA |
133 | static void rsa_priv_f2_done(struct device *dev, u32 *desc, u32 err, |
134 | void *context) | |
135 | { | |
136 | struct akcipher_request *req = context; | |
137 | struct rsa_edesc *edesc; | |
138 | ||
139 | if (err) | |
140 | caam_jr_strstatus(dev, err); | |
141 | ||
142 | edesc = container_of(desc, struct rsa_edesc, hw_desc[0]); | |
143 | ||
144 | rsa_priv_f2_unmap(dev, edesc, req); | |
145 | rsa_io_unmap(dev, edesc, req); | |
146 | kfree(edesc); | |
147 | ||
148 | akcipher_request_complete(req, err); | |
149 | } | |
150 | ||
4a651b12 RA |
151 | static void rsa_priv_f3_done(struct device *dev, u32 *desc, u32 err, |
152 | void *context) | |
153 | { | |
154 | struct akcipher_request *req = context; | |
155 | struct rsa_edesc *edesc; | |
156 | ||
157 | if (err) | |
158 | caam_jr_strstatus(dev, err); | |
159 | ||
160 | edesc = container_of(desc, struct rsa_edesc, hw_desc[0]); | |
161 | ||
162 | rsa_priv_f3_unmap(dev, edesc, req); | |
163 | rsa_io_unmap(dev, edesc, req); | |
164 | kfree(edesc); | |
165 | ||
166 | akcipher_request_complete(req, err); | |
167 | } | |
168 | ||
8a2a0dd3 HG |
169 | static int caam_rsa_count_leading_zeros(struct scatterlist *sgl, |
170 | unsigned int nbytes, | |
171 | unsigned int flags) | |
172 | { | |
173 | struct sg_mapping_iter miter; | |
174 | int lzeros, ents; | |
175 | unsigned int len; | |
176 | unsigned int tbytes = nbytes; | |
177 | const u8 *buff; | |
178 | ||
179 | ents = sg_nents_for_len(sgl, nbytes); | |
180 | if (ents < 0) | |
181 | return ents; | |
182 | ||
183 | sg_miter_start(&miter, sgl, ents, SG_MITER_FROM_SG | flags); | |
184 | ||
185 | lzeros = 0; | |
186 | len = 0; | |
187 | while (nbytes > 0) { | |
188 | while (len && !*buff) { | |
189 | lzeros++; | |
190 | len--; | |
191 | buff++; | |
192 | } | |
193 | ||
194 | if (len && *buff) | |
195 | break; | |
196 | ||
197 | sg_miter_next(&miter); | |
198 | buff = miter.addr; | |
199 | len = miter.length; | |
200 | ||
201 | nbytes -= lzeros; | |
202 | lzeros = 0; | |
203 | } | |
204 | ||
205 | miter.consumed = lzeros; | |
206 | sg_miter_stop(&miter); | |
207 | nbytes -= lzeros; | |
208 | ||
209 | return tbytes - nbytes; | |
210 | } | |
211 | ||
8c419778 TA |
212 | static struct rsa_edesc *rsa_edesc_alloc(struct akcipher_request *req, |
213 | size_t desclen) | |
214 | { | |
215 | struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); | |
216 | struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); | |
217 | struct device *dev = ctx->dev; | |
8a2a0dd3 | 218 | struct caam_rsa_req_ctx *req_ctx = akcipher_request_ctx(req); |
8c419778 | 219 | struct rsa_edesc *edesc; |
019d62db HG |
220 | gfp_t flags = (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ? |
221 | GFP_KERNEL : GFP_ATOMIC; | |
8a2a0dd3 | 222 | int sg_flags = (flags == GFP_ATOMIC) ? SG_MITER_ATOMIC : 0; |
8c419778 TA |
223 | int sgc; |
224 | int sec4_sg_index, sec4_sg_len = 0, sec4_sg_bytes; | |
225 | int src_nents, dst_nents; | |
8a2a0dd3 HG |
226 | int lzeros; |
227 | ||
228 | lzeros = caam_rsa_count_leading_zeros(req->src, req->src_len, sg_flags); | |
229 | if (lzeros < 0) | |
230 | return ERR_PTR(lzeros); | |
231 | ||
232 | req->src_len -= lzeros; | |
233 | req->src = scatterwalk_ffwd(req_ctx->src, req->src, lzeros); | |
8c419778 TA |
234 | |
235 | src_nents = sg_nents_for_len(req->src, req->src_len); | |
236 | dst_nents = sg_nents_for_len(req->dst, req->dst_len); | |
237 | ||
238 | if (src_nents > 1) | |
239 | sec4_sg_len = src_nents; | |
240 | if (dst_nents > 1) | |
241 | sec4_sg_len += dst_nents; | |
242 | ||
243 | sec4_sg_bytes = sec4_sg_len * sizeof(struct sec4_sg_entry); | |
244 | ||
245 | /* allocate space for base edesc, hw desc commands and link tables */ | |
246 | edesc = kzalloc(sizeof(*edesc) + desclen + sec4_sg_bytes, | |
247 | GFP_DMA | flags); | |
248 | if (!edesc) | |
249 | return ERR_PTR(-ENOMEM); | |
250 | ||
251 | sgc = dma_map_sg(dev, req->src, src_nents, DMA_TO_DEVICE); | |
252 | if (unlikely(!sgc)) { | |
253 | dev_err(dev, "unable to map source\n"); | |
254 | goto src_fail; | |
255 | } | |
256 | ||
257 | sgc = dma_map_sg(dev, req->dst, dst_nents, DMA_FROM_DEVICE); | |
258 | if (unlikely(!sgc)) { | |
259 | dev_err(dev, "unable to map destination\n"); | |
260 | goto dst_fail; | |
261 | } | |
262 | ||
263 | edesc->sec4_sg = (void *)edesc + sizeof(*edesc) + desclen; | |
264 | ||
265 | sec4_sg_index = 0; | |
266 | if (src_nents > 1) { | |
267 | sg_to_sec4_sg_last(req->src, src_nents, edesc->sec4_sg, 0); | |
268 | sec4_sg_index += src_nents; | |
269 | } | |
270 | if (dst_nents > 1) | |
271 | sg_to_sec4_sg_last(req->dst, dst_nents, | |
272 | edesc->sec4_sg + sec4_sg_index, 0); | |
273 | ||
274 | /* Save nents for later use in Job Descriptor */ | |
275 | edesc->src_nents = src_nents; | |
276 | edesc->dst_nents = dst_nents; | |
277 | ||
278 | if (!sec4_sg_bytes) | |
279 | return edesc; | |
280 | ||
281 | edesc->sec4_sg_dma = dma_map_single(dev, edesc->sec4_sg, | |
282 | sec4_sg_bytes, DMA_TO_DEVICE); | |
283 | if (dma_mapping_error(dev, edesc->sec4_sg_dma)) { | |
284 | dev_err(dev, "unable to map S/G table\n"); | |
285 | goto sec4_sg_fail; | |
286 | } | |
287 | ||
288 | edesc->sec4_sg_bytes = sec4_sg_bytes; | |
289 | ||
290 | return edesc; | |
291 | ||
292 | sec4_sg_fail: | |
293 | dma_unmap_sg(dev, req->dst, dst_nents, DMA_FROM_DEVICE); | |
294 | dst_fail: | |
295 | dma_unmap_sg(dev, req->src, src_nents, DMA_TO_DEVICE); | |
296 | src_fail: | |
297 | kfree(edesc); | |
298 | return ERR_PTR(-ENOMEM); | |
299 | } | |
300 | ||
301 | static int set_rsa_pub_pdb(struct akcipher_request *req, | |
302 | struct rsa_edesc *edesc) | |
303 | { | |
304 | struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); | |
305 | struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); | |
306 | struct caam_rsa_key *key = &ctx->key; | |
307 | struct device *dev = ctx->dev; | |
308 | struct rsa_pub_pdb *pdb = &edesc->pdb.pub; | |
309 | int sec4_sg_index = 0; | |
310 | ||
311 | pdb->n_dma = dma_map_single(dev, key->n, key->n_sz, DMA_TO_DEVICE); | |
312 | if (dma_mapping_error(dev, pdb->n_dma)) { | |
313 | dev_err(dev, "Unable to map RSA modulus memory\n"); | |
314 | return -ENOMEM; | |
315 | } | |
316 | ||
317 | pdb->e_dma = dma_map_single(dev, key->e, key->e_sz, DMA_TO_DEVICE); | |
318 | if (dma_mapping_error(dev, pdb->e_dma)) { | |
319 | dev_err(dev, "Unable to map RSA public exponent memory\n"); | |
320 | dma_unmap_single(dev, pdb->n_dma, key->n_sz, DMA_TO_DEVICE); | |
321 | return -ENOMEM; | |
322 | } | |
323 | ||
324 | if (edesc->src_nents > 1) { | |
325 | pdb->sgf |= RSA_PDB_SGF_F; | |
326 | pdb->f_dma = edesc->sec4_sg_dma; | |
327 | sec4_sg_index += edesc->src_nents; | |
328 | } else { | |
329 | pdb->f_dma = sg_dma_address(req->src); | |
330 | } | |
331 | ||
332 | if (edesc->dst_nents > 1) { | |
333 | pdb->sgf |= RSA_PDB_SGF_G; | |
334 | pdb->g_dma = edesc->sec4_sg_dma + | |
335 | sec4_sg_index * sizeof(struct sec4_sg_entry); | |
336 | } else { | |
337 | pdb->g_dma = sg_dma_address(req->dst); | |
338 | } | |
339 | ||
340 | pdb->sgf |= (key->e_sz << RSA_PDB_E_SHIFT) | key->n_sz; | |
341 | pdb->f_len = req->src_len; | |
342 | ||
343 | return 0; | |
344 | } | |
345 | ||
346 | static int set_rsa_priv_f1_pdb(struct akcipher_request *req, | |
347 | struct rsa_edesc *edesc) | |
348 | { | |
349 | struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); | |
350 | struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); | |
351 | struct caam_rsa_key *key = &ctx->key; | |
352 | struct device *dev = ctx->dev; | |
353 | struct rsa_priv_f1_pdb *pdb = &edesc->pdb.priv_f1; | |
354 | int sec4_sg_index = 0; | |
355 | ||
356 | pdb->n_dma = dma_map_single(dev, key->n, key->n_sz, DMA_TO_DEVICE); | |
357 | if (dma_mapping_error(dev, pdb->n_dma)) { | |
358 | dev_err(dev, "Unable to map modulus memory\n"); | |
359 | return -ENOMEM; | |
360 | } | |
361 | ||
362 | pdb->d_dma = dma_map_single(dev, key->d, key->d_sz, DMA_TO_DEVICE); | |
363 | if (dma_mapping_error(dev, pdb->d_dma)) { | |
364 | dev_err(dev, "Unable to map RSA private exponent memory\n"); | |
365 | dma_unmap_single(dev, pdb->n_dma, key->n_sz, DMA_TO_DEVICE); | |
366 | return -ENOMEM; | |
367 | } | |
368 | ||
369 | if (edesc->src_nents > 1) { | |
370 | pdb->sgf |= RSA_PRIV_PDB_SGF_G; | |
371 | pdb->g_dma = edesc->sec4_sg_dma; | |
372 | sec4_sg_index += edesc->src_nents; | |
373 | } else { | |
374 | pdb->g_dma = sg_dma_address(req->src); | |
375 | } | |
376 | ||
377 | if (edesc->dst_nents > 1) { | |
378 | pdb->sgf |= RSA_PRIV_PDB_SGF_F; | |
379 | pdb->f_dma = edesc->sec4_sg_dma + | |
380 | sec4_sg_index * sizeof(struct sec4_sg_entry); | |
381 | } else { | |
382 | pdb->f_dma = sg_dma_address(req->dst); | |
383 | } | |
384 | ||
385 | pdb->sgf |= (key->d_sz << RSA_PDB_D_SHIFT) | key->n_sz; | |
386 | ||
387 | return 0; | |
388 | } | |
389 | ||
52e26d77 RA |
390 | static int set_rsa_priv_f2_pdb(struct akcipher_request *req, |
391 | struct rsa_edesc *edesc) | |
392 | { | |
393 | struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); | |
394 | struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); | |
395 | struct caam_rsa_key *key = &ctx->key; | |
396 | struct device *dev = ctx->dev; | |
397 | struct rsa_priv_f2_pdb *pdb = &edesc->pdb.priv_f2; | |
398 | int sec4_sg_index = 0; | |
399 | size_t p_sz = key->p_sz; | |
4bffaab3 | 400 | size_t q_sz = key->q_sz; |
52e26d77 RA |
401 | |
402 | pdb->d_dma = dma_map_single(dev, key->d, key->d_sz, DMA_TO_DEVICE); | |
403 | if (dma_mapping_error(dev, pdb->d_dma)) { | |
404 | dev_err(dev, "Unable to map RSA private exponent memory\n"); | |
405 | return -ENOMEM; | |
406 | } | |
407 | ||
408 | pdb->p_dma = dma_map_single(dev, key->p, p_sz, DMA_TO_DEVICE); | |
409 | if (dma_mapping_error(dev, pdb->p_dma)) { | |
410 | dev_err(dev, "Unable to map RSA prime factor p memory\n"); | |
411 | goto unmap_d; | |
412 | } | |
413 | ||
414 | pdb->q_dma = dma_map_single(dev, key->q, q_sz, DMA_TO_DEVICE); | |
415 | if (dma_mapping_error(dev, pdb->q_dma)) { | |
416 | dev_err(dev, "Unable to map RSA prime factor q memory\n"); | |
417 | goto unmap_p; | |
418 | } | |
419 | ||
f1bf9e60 | 420 | pdb->tmp1_dma = dma_map_single(dev, key->tmp1, p_sz, DMA_BIDIRECTIONAL); |
52e26d77 RA |
421 | if (dma_mapping_error(dev, pdb->tmp1_dma)) { |
422 | dev_err(dev, "Unable to map RSA tmp1 memory\n"); | |
423 | goto unmap_q; | |
424 | } | |
425 | ||
f1bf9e60 | 426 | pdb->tmp2_dma = dma_map_single(dev, key->tmp2, q_sz, DMA_BIDIRECTIONAL); |
52e26d77 RA |
427 | if (dma_mapping_error(dev, pdb->tmp2_dma)) { |
428 | dev_err(dev, "Unable to map RSA tmp2 memory\n"); | |
429 | goto unmap_tmp1; | |
430 | } | |
431 | ||
432 | if (edesc->src_nents > 1) { | |
433 | pdb->sgf |= RSA_PRIV_PDB_SGF_G; | |
434 | pdb->g_dma = edesc->sec4_sg_dma; | |
435 | sec4_sg_index += edesc->src_nents; | |
436 | } else { | |
437 | pdb->g_dma = sg_dma_address(req->src); | |
438 | } | |
439 | ||
440 | if (edesc->dst_nents > 1) { | |
441 | pdb->sgf |= RSA_PRIV_PDB_SGF_F; | |
442 | pdb->f_dma = edesc->sec4_sg_dma + | |
443 | sec4_sg_index * sizeof(struct sec4_sg_entry); | |
444 | } else { | |
445 | pdb->f_dma = sg_dma_address(req->dst); | |
446 | } | |
447 | ||
448 | pdb->sgf |= (key->d_sz << RSA_PDB_D_SHIFT) | key->n_sz; | |
449 | pdb->p_q_len = (q_sz << RSA_PDB_Q_SHIFT) | p_sz; | |
450 | ||
451 | return 0; | |
452 | ||
453 | unmap_tmp1: | |
f1bf9e60 | 454 | dma_unmap_single(dev, pdb->tmp1_dma, p_sz, DMA_BIDIRECTIONAL); |
52e26d77 RA |
455 | unmap_q: |
456 | dma_unmap_single(dev, pdb->q_dma, q_sz, DMA_TO_DEVICE); | |
457 | unmap_p: | |
458 | dma_unmap_single(dev, pdb->p_dma, p_sz, DMA_TO_DEVICE); | |
459 | unmap_d: | |
460 | dma_unmap_single(dev, pdb->d_dma, key->d_sz, DMA_TO_DEVICE); | |
461 | ||
462 | return -ENOMEM; | |
463 | } | |
464 | ||
4a651b12 RA |
465 | static int set_rsa_priv_f3_pdb(struct akcipher_request *req, |
466 | struct rsa_edesc *edesc) | |
467 | { | |
468 | struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); | |
469 | struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); | |
470 | struct caam_rsa_key *key = &ctx->key; | |
471 | struct device *dev = ctx->dev; | |
472 | struct rsa_priv_f3_pdb *pdb = &edesc->pdb.priv_f3; | |
473 | int sec4_sg_index = 0; | |
474 | size_t p_sz = key->p_sz; | |
4bffaab3 | 475 | size_t q_sz = key->q_sz; |
4a651b12 RA |
476 | |
477 | pdb->p_dma = dma_map_single(dev, key->p, p_sz, DMA_TO_DEVICE); | |
478 | if (dma_mapping_error(dev, pdb->p_dma)) { | |
479 | dev_err(dev, "Unable to map RSA prime factor p memory\n"); | |
480 | return -ENOMEM; | |
481 | } | |
482 | ||
483 | pdb->q_dma = dma_map_single(dev, key->q, q_sz, DMA_TO_DEVICE); | |
484 | if (dma_mapping_error(dev, pdb->q_dma)) { | |
485 | dev_err(dev, "Unable to map RSA prime factor q memory\n"); | |
486 | goto unmap_p; | |
487 | } | |
488 | ||
489 | pdb->dp_dma = dma_map_single(dev, key->dp, p_sz, DMA_TO_DEVICE); | |
490 | if (dma_mapping_error(dev, pdb->dp_dma)) { | |
491 | dev_err(dev, "Unable to map RSA exponent dp memory\n"); | |
492 | goto unmap_q; | |
493 | } | |
494 | ||
495 | pdb->dq_dma = dma_map_single(dev, key->dq, q_sz, DMA_TO_DEVICE); | |
496 | if (dma_mapping_error(dev, pdb->dq_dma)) { | |
497 | dev_err(dev, "Unable to map RSA exponent dq memory\n"); | |
498 | goto unmap_dp; | |
499 | } | |
500 | ||
501 | pdb->c_dma = dma_map_single(dev, key->qinv, p_sz, DMA_TO_DEVICE); | |
502 | if (dma_mapping_error(dev, pdb->c_dma)) { | |
503 | dev_err(dev, "Unable to map RSA CRT coefficient qinv memory\n"); | |
504 | goto unmap_dq; | |
505 | } | |
506 | ||
f1bf9e60 | 507 | pdb->tmp1_dma = dma_map_single(dev, key->tmp1, p_sz, DMA_BIDIRECTIONAL); |
4a651b12 RA |
508 | if (dma_mapping_error(dev, pdb->tmp1_dma)) { |
509 | dev_err(dev, "Unable to map RSA tmp1 memory\n"); | |
510 | goto unmap_qinv; | |
511 | } | |
512 | ||
f1bf9e60 | 513 | pdb->tmp2_dma = dma_map_single(dev, key->tmp2, q_sz, DMA_BIDIRECTIONAL); |
4a651b12 RA |
514 | if (dma_mapping_error(dev, pdb->tmp2_dma)) { |
515 | dev_err(dev, "Unable to map RSA tmp2 memory\n"); | |
516 | goto unmap_tmp1; | |
517 | } | |
518 | ||
519 | if (edesc->src_nents > 1) { | |
520 | pdb->sgf |= RSA_PRIV_PDB_SGF_G; | |
521 | pdb->g_dma = edesc->sec4_sg_dma; | |
522 | sec4_sg_index += edesc->src_nents; | |
523 | } else { | |
524 | pdb->g_dma = sg_dma_address(req->src); | |
525 | } | |
526 | ||
527 | if (edesc->dst_nents > 1) { | |
528 | pdb->sgf |= RSA_PRIV_PDB_SGF_F; | |
529 | pdb->f_dma = edesc->sec4_sg_dma + | |
530 | sec4_sg_index * sizeof(struct sec4_sg_entry); | |
531 | } else { | |
532 | pdb->f_dma = sg_dma_address(req->dst); | |
533 | } | |
534 | ||
535 | pdb->sgf |= key->n_sz; | |
536 | pdb->p_q_len = (q_sz << RSA_PDB_Q_SHIFT) | p_sz; | |
537 | ||
538 | return 0; | |
539 | ||
540 | unmap_tmp1: | |
f1bf9e60 | 541 | dma_unmap_single(dev, pdb->tmp1_dma, p_sz, DMA_BIDIRECTIONAL); |
4a651b12 RA |
542 | unmap_qinv: |
543 | dma_unmap_single(dev, pdb->c_dma, p_sz, DMA_TO_DEVICE); | |
544 | unmap_dq: | |
545 | dma_unmap_single(dev, pdb->dq_dma, q_sz, DMA_TO_DEVICE); | |
546 | unmap_dp: | |
547 | dma_unmap_single(dev, pdb->dp_dma, p_sz, DMA_TO_DEVICE); | |
548 | unmap_q: | |
549 | dma_unmap_single(dev, pdb->q_dma, q_sz, DMA_TO_DEVICE); | |
550 | unmap_p: | |
551 | dma_unmap_single(dev, pdb->p_dma, p_sz, DMA_TO_DEVICE); | |
552 | ||
553 | return -ENOMEM; | |
554 | } | |
555 | ||
8c419778 TA |
556 | static int caam_rsa_enc(struct akcipher_request *req) |
557 | { | |
558 | struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); | |
559 | struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); | |
560 | struct caam_rsa_key *key = &ctx->key; | |
561 | struct device *jrdev = ctx->dev; | |
562 | struct rsa_edesc *edesc; | |
563 | int ret; | |
564 | ||
565 | if (unlikely(!key->n || !key->e)) | |
566 | return -EINVAL; | |
567 | ||
568 | if (req->dst_len < key->n_sz) { | |
569 | req->dst_len = key->n_sz; | |
570 | dev_err(jrdev, "Output buffer length less than parameter n\n"); | |
571 | return -EOVERFLOW; | |
572 | } | |
573 | ||
574 | /* Allocate extended descriptor */ | |
575 | edesc = rsa_edesc_alloc(req, DESC_RSA_PUB_LEN); | |
576 | if (IS_ERR(edesc)) | |
577 | return PTR_ERR(edesc); | |
578 | ||
579 | /* Set RSA Encrypt Protocol Data Block */ | |
580 | ret = set_rsa_pub_pdb(req, edesc); | |
581 | if (ret) | |
582 | goto init_fail; | |
583 | ||
584 | /* Initialize Job Descriptor */ | |
585 | init_rsa_pub_desc(edesc->hw_desc, &edesc->pdb.pub); | |
586 | ||
587 | ret = caam_jr_enqueue(jrdev, edesc->hw_desc, rsa_pub_done, req); | |
588 | if (!ret) | |
589 | return -EINPROGRESS; | |
590 | ||
591 | rsa_pub_unmap(jrdev, edesc, req); | |
592 | ||
593 | init_fail: | |
594 | rsa_io_unmap(jrdev, edesc, req); | |
595 | kfree(edesc); | |
596 | return ret; | |
597 | } | |
598 | ||
52e26d77 | 599 | static int caam_rsa_dec_priv_f1(struct akcipher_request *req) |
8c419778 TA |
600 | { |
601 | struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); | |
602 | struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); | |
8c419778 TA |
603 | struct device *jrdev = ctx->dev; |
604 | struct rsa_edesc *edesc; | |
605 | int ret; | |
606 | ||
8c419778 TA |
607 | /* Allocate extended descriptor */ |
608 | edesc = rsa_edesc_alloc(req, DESC_RSA_PRIV_F1_LEN); | |
609 | if (IS_ERR(edesc)) | |
610 | return PTR_ERR(edesc); | |
611 | ||
612 | /* Set RSA Decrypt Protocol Data Block - Private Key Form #1 */ | |
613 | ret = set_rsa_priv_f1_pdb(req, edesc); | |
614 | if (ret) | |
615 | goto init_fail; | |
616 | ||
617 | /* Initialize Job Descriptor */ | |
618 | init_rsa_priv_f1_desc(edesc->hw_desc, &edesc->pdb.priv_f1); | |
619 | ||
620 | ret = caam_jr_enqueue(jrdev, edesc->hw_desc, rsa_priv_f1_done, req); | |
621 | if (!ret) | |
622 | return -EINPROGRESS; | |
623 | ||
624 | rsa_priv_f1_unmap(jrdev, edesc, req); | |
625 | ||
626 | init_fail: | |
627 | rsa_io_unmap(jrdev, edesc, req); | |
628 | kfree(edesc); | |
629 | return ret; | |
630 | } | |
631 | ||
52e26d77 RA |
632 | static int caam_rsa_dec_priv_f2(struct akcipher_request *req) |
633 | { | |
634 | struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); | |
635 | struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); | |
636 | struct device *jrdev = ctx->dev; | |
637 | struct rsa_edesc *edesc; | |
638 | int ret; | |
639 | ||
640 | /* Allocate extended descriptor */ | |
641 | edesc = rsa_edesc_alloc(req, DESC_RSA_PRIV_F2_LEN); | |
642 | if (IS_ERR(edesc)) | |
643 | return PTR_ERR(edesc); | |
644 | ||
645 | /* Set RSA Decrypt Protocol Data Block - Private Key Form #2 */ | |
646 | ret = set_rsa_priv_f2_pdb(req, edesc); | |
647 | if (ret) | |
648 | goto init_fail; | |
649 | ||
650 | /* Initialize Job Descriptor */ | |
651 | init_rsa_priv_f2_desc(edesc->hw_desc, &edesc->pdb.priv_f2); | |
652 | ||
653 | ret = caam_jr_enqueue(jrdev, edesc->hw_desc, rsa_priv_f2_done, req); | |
654 | if (!ret) | |
655 | return -EINPROGRESS; | |
656 | ||
657 | rsa_priv_f2_unmap(jrdev, edesc, req); | |
658 | ||
659 | init_fail: | |
660 | rsa_io_unmap(jrdev, edesc, req); | |
661 | kfree(edesc); | |
662 | return ret; | |
663 | } | |
664 | ||
4a651b12 RA |
665 | static int caam_rsa_dec_priv_f3(struct akcipher_request *req) |
666 | { | |
667 | struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); | |
668 | struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); | |
669 | struct device *jrdev = ctx->dev; | |
670 | struct rsa_edesc *edesc; | |
671 | int ret; | |
672 | ||
673 | /* Allocate extended descriptor */ | |
674 | edesc = rsa_edesc_alloc(req, DESC_RSA_PRIV_F3_LEN); | |
675 | if (IS_ERR(edesc)) | |
676 | return PTR_ERR(edesc); | |
677 | ||
678 | /* Set RSA Decrypt Protocol Data Block - Private Key Form #3 */ | |
679 | ret = set_rsa_priv_f3_pdb(req, edesc); | |
680 | if (ret) | |
681 | goto init_fail; | |
682 | ||
683 | /* Initialize Job Descriptor */ | |
684 | init_rsa_priv_f3_desc(edesc->hw_desc, &edesc->pdb.priv_f3); | |
685 | ||
686 | ret = caam_jr_enqueue(jrdev, edesc->hw_desc, rsa_priv_f3_done, req); | |
687 | if (!ret) | |
688 | return -EINPROGRESS; | |
689 | ||
690 | rsa_priv_f3_unmap(jrdev, edesc, req); | |
691 | ||
692 | init_fail: | |
693 | rsa_io_unmap(jrdev, edesc, req); | |
694 | kfree(edesc); | |
695 | return ret; | |
696 | } | |
697 | ||
52e26d77 RA |
698 | static int caam_rsa_dec(struct akcipher_request *req) |
699 | { | |
700 | struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); | |
701 | struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); | |
702 | struct caam_rsa_key *key = &ctx->key; | |
703 | int ret; | |
704 | ||
705 | if (unlikely(!key->n || !key->d)) | |
706 | return -EINVAL; | |
707 | ||
708 | if (req->dst_len < key->n_sz) { | |
709 | req->dst_len = key->n_sz; | |
710 | dev_err(ctx->dev, "Output buffer length less than parameter n\n"); | |
711 | return -EOVERFLOW; | |
712 | } | |
713 | ||
4a651b12 RA |
714 | if (key->priv_form == FORM3) |
715 | ret = caam_rsa_dec_priv_f3(req); | |
716 | else if (key->priv_form == FORM2) | |
52e26d77 RA |
717 | ret = caam_rsa_dec_priv_f2(req); |
718 | else | |
719 | ret = caam_rsa_dec_priv_f1(req); | |
720 | ||
721 | return ret; | |
722 | } | |
723 | ||
8c419778 TA |
724 | static void caam_rsa_free_key(struct caam_rsa_key *key) |
725 | { | |
726 | kzfree(key->d); | |
52e26d77 RA |
727 | kzfree(key->p); |
728 | kzfree(key->q); | |
4a651b12 RA |
729 | kzfree(key->dp); |
730 | kzfree(key->dq); | |
731 | kzfree(key->qinv); | |
52e26d77 RA |
732 | kzfree(key->tmp1); |
733 | kzfree(key->tmp2); | |
8c419778 TA |
734 | kfree(key->e); |
735 | kfree(key->n); | |
52e26d77 | 736 | memset(key, 0, sizeof(*key)); |
8c419778 TA |
737 | } |
738 | ||
7ca4a9a1 RA |
739 | static void caam_rsa_drop_leading_zeros(const u8 **ptr, size_t *nbytes) |
740 | { | |
741 | while (!**ptr && *nbytes) { | |
742 | (*ptr)++; | |
743 | (*nbytes)--; | |
744 | } | |
745 | } | |
746 | ||
4a651b12 RA |
747 | /** |
748 | * caam_read_rsa_crt - Used for reading dP, dQ, qInv CRT members. | |
749 | * dP, dQ and qInv could decode to less than corresponding p, q length, as the | |
750 | * BER-encoding requires that the minimum number of bytes be used to encode the | |
751 | * integer. dP, dQ, qInv decoded values have to be zero-padded to appropriate | |
752 | * length. | |
753 | * | |
754 | * @ptr : pointer to {dP, dQ, qInv} CRT member | |
755 | * @nbytes: length in bytes of {dP, dQ, qInv} CRT member | |
756 | * @dstlen: length in bytes of corresponding p or q prime factor | |
757 | */ | |
758 | static u8 *caam_read_rsa_crt(const u8 *ptr, size_t nbytes, size_t dstlen) | |
759 | { | |
760 | u8 *dst; | |
761 | ||
762 | caam_rsa_drop_leading_zeros(&ptr, &nbytes); | |
763 | if (!nbytes) | |
764 | return NULL; | |
765 | ||
766 | dst = kzalloc(dstlen, GFP_DMA | GFP_KERNEL); | |
767 | if (!dst) | |
768 | return NULL; | |
769 | ||
770 | memcpy(dst + (dstlen - nbytes), ptr, nbytes); | |
771 | ||
772 | return dst; | |
773 | } | |
774 | ||
8c419778 TA |
775 | /** |
776 | * caam_read_raw_data - Read a raw byte stream as a positive integer. | |
777 | * The function skips buffer's leading zeros, copies the remained data | |
778 | * to a buffer allocated in the GFP_DMA | GFP_KERNEL zone and returns | |
779 | * the address of the new buffer. | |
780 | * | |
781 | * @buf : The data to read | |
782 | * @nbytes: The amount of data to read | |
783 | */ | |
784 | static inline u8 *caam_read_raw_data(const u8 *buf, size_t *nbytes) | |
785 | { | |
8c419778 | 786 | |
7ca4a9a1 | 787 | caam_rsa_drop_leading_zeros(&buf, nbytes); |
7fcaf62a TA |
788 | if (!*nbytes) |
789 | return NULL; | |
8c419778 | 790 | |
b930f3a2 | 791 | return kmemdup(buf, *nbytes, GFP_DMA | GFP_KERNEL); |
8c419778 TA |
792 | } |
793 | ||
794 | static int caam_rsa_check_key_length(unsigned int len) | |
795 | { | |
796 | if (len > 4096) | |
797 | return -EINVAL; | |
798 | return 0; | |
799 | } | |
800 | ||
801 | static int caam_rsa_set_pub_key(struct crypto_akcipher *tfm, const void *key, | |
802 | unsigned int keylen) | |
803 | { | |
804 | struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); | |
8439e94f | 805 | struct rsa_key raw_key = {NULL}; |
8c419778 TA |
806 | struct caam_rsa_key *rsa_key = &ctx->key; |
807 | int ret; | |
808 | ||
809 | /* Free the old RSA key if any */ | |
810 | caam_rsa_free_key(rsa_key); | |
811 | ||
812 | ret = rsa_parse_pub_key(&raw_key, key, keylen); | |
813 | if (ret) | |
814 | return ret; | |
815 | ||
816 | /* Copy key in DMA zone */ | |
817 | rsa_key->e = kzalloc(raw_key.e_sz, GFP_DMA | GFP_KERNEL); | |
818 | if (!rsa_key->e) | |
819 | goto err; | |
820 | ||
821 | /* | |
822 | * Skip leading zeros and copy the positive integer to a buffer | |
823 | * allocated in the GFP_DMA | GFP_KERNEL zone. The decryption descriptor | |
824 | * expects a positive integer for the RSA modulus and uses its length as | |
825 | * decryption output length. | |
826 | */ | |
827 | rsa_key->n = caam_read_raw_data(raw_key.n, &raw_key.n_sz); | |
828 | if (!rsa_key->n) | |
829 | goto err; | |
830 | ||
831 | if (caam_rsa_check_key_length(raw_key.n_sz << 3)) { | |
832 | caam_rsa_free_key(rsa_key); | |
833 | return -EINVAL; | |
834 | } | |
835 | ||
836 | rsa_key->e_sz = raw_key.e_sz; | |
837 | rsa_key->n_sz = raw_key.n_sz; | |
838 | ||
839 | memcpy(rsa_key->e, raw_key.e, raw_key.e_sz); | |
840 | ||
841 | return 0; | |
842 | err: | |
843 | caam_rsa_free_key(rsa_key); | |
844 | return -ENOMEM; | |
845 | } | |
846 | ||
52e26d77 RA |
847 | static void caam_rsa_set_priv_key_form(struct caam_rsa_ctx *ctx, |
848 | struct rsa_key *raw_key) | |
849 | { | |
850 | struct caam_rsa_key *rsa_key = &ctx->key; | |
851 | size_t p_sz = raw_key->p_sz; | |
852 | size_t q_sz = raw_key->q_sz; | |
853 | ||
854 | rsa_key->p = caam_read_raw_data(raw_key->p, &p_sz); | |
855 | if (!rsa_key->p) | |
856 | return; | |
857 | rsa_key->p_sz = p_sz; | |
858 | ||
859 | rsa_key->q = caam_read_raw_data(raw_key->q, &q_sz); | |
860 | if (!rsa_key->q) | |
861 | goto free_p; | |
862 | rsa_key->q_sz = q_sz; | |
863 | ||
864 | rsa_key->tmp1 = kzalloc(raw_key->p_sz, GFP_DMA | GFP_KERNEL); | |
865 | if (!rsa_key->tmp1) | |
866 | goto free_q; | |
867 | ||
868 | rsa_key->tmp2 = kzalloc(raw_key->q_sz, GFP_DMA | GFP_KERNEL); | |
869 | if (!rsa_key->tmp2) | |
870 | goto free_tmp1; | |
871 | ||
872 | rsa_key->priv_form = FORM2; | |
873 | ||
4a651b12 RA |
874 | rsa_key->dp = caam_read_rsa_crt(raw_key->dp, raw_key->dp_sz, p_sz); |
875 | if (!rsa_key->dp) | |
876 | goto free_tmp2; | |
877 | ||
878 | rsa_key->dq = caam_read_rsa_crt(raw_key->dq, raw_key->dq_sz, q_sz); | |
879 | if (!rsa_key->dq) | |
880 | goto free_dp; | |
881 | ||
882 | rsa_key->qinv = caam_read_rsa_crt(raw_key->qinv, raw_key->qinv_sz, | |
883 | q_sz); | |
884 | if (!rsa_key->qinv) | |
885 | goto free_dq; | |
886 | ||
887 | rsa_key->priv_form = FORM3; | |
888 | ||
52e26d77 RA |
889 | return; |
890 | ||
4a651b12 RA |
891 | free_dq: |
892 | kzfree(rsa_key->dq); | |
893 | free_dp: | |
894 | kzfree(rsa_key->dp); | |
895 | free_tmp2: | |
896 | kzfree(rsa_key->tmp2); | |
52e26d77 RA |
897 | free_tmp1: |
898 | kzfree(rsa_key->tmp1); | |
899 | free_q: | |
900 | kzfree(rsa_key->q); | |
901 | free_p: | |
902 | kzfree(rsa_key->p); | |
903 | } | |
904 | ||
8c419778 TA |
905 | static int caam_rsa_set_priv_key(struct crypto_akcipher *tfm, const void *key, |
906 | unsigned int keylen) | |
907 | { | |
908 | struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); | |
8439e94f | 909 | struct rsa_key raw_key = {NULL}; |
8c419778 TA |
910 | struct caam_rsa_key *rsa_key = &ctx->key; |
911 | int ret; | |
912 | ||
913 | /* Free the old RSA key if any */ | |
914 | caam_rsa_free_key(rsa_key); | |
915 | ||
916 | ret = rsa_parse_priv_key(&raw_key, key, keylen); | |
917 | if (ret) | |
918 | return ret; | |
919 | ||
920 | /* Copy key in DMA zone */ | |
921 | rsa_key->d = kzalloc(raw_key.d_sz, GFP_DMA | GFP_KERNEL); | |
922 | if (!rsa_key->d) | |
923 | goto err; | |
924 | ||
925 | rsa_key->e = kzalloc(raw_key.e_sz, GFP_DMA | GFP_KERNEL); | |
926 | if (!rsa_key->e) | |
927 | goto err; | |
928 | ||
929 | /* | |
930 | * Skip leading zeros and copy the positive integer to a buffer | |
931 | * allocated in the GFP_DMA | GFP_KERNEL zone. The decryption descriptor | |
932 | * expects a positive integer for the RSA modulus and uses its length as | |
933 | * decryption output length. | |
934 | */ | |
935 | rsa_key->n = caam_read_raw_data(raw_key.n, &raw_key.n_sz); | |
936 | if (!rsa_key->n) | |
937 | goto err; | |
938 | ||
939 | if (caam_rsa_check_key_length(raw_key.n_sz << 3)) { | |
940 | caam_rsa_free_key(rsa_key); | |
941 | return -EINVAL; | |
942 | } | |
943 | ||
944 | rsa_key->d_sz = raw_key.d_sz; | |
945 | rsa_key->e_sz = raw_key.e_sz; | |
946 | rsa_key->n_sz = raw_key.n_sz; | |
947 | ||
948 | memcpy(rsa_key->d, raw_key.d, raw_key.d_sz); | |
949 | memcpy(rsa_key->e, raw_key.e, raw_key.e_sz); | |
950 | ||
52e26d77 RA |
951 | caam_rsa_set_priv_key_form(ctx, &raw_key); |
952 | ||
8c419778 TA |
953 | return 0; |
954 | ||
955 | err: | |
956 | caam_rsa_free_key(rsa_key); | |
957 | return -ENOMEM; | |
958 | } | |
959 | ||
e198429c | 960 | static unsigned int caam_rsa_max_size(struct crypto_akcipher *tfm) |
8c419778 TA |
961 | { |
962 | struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); | |
8c419778 | 963 | |
e198429c | 964 | return ctx->key.n_sz; |
8c419778 TA |
965 | } |
966 | ||
967 | /* Per session pkc's driver context creation function */ | |
968 | static int caam_rsa_init_tfm(struct crypto_akcipher *tfm) | |
969 | { | |
970 | struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); | |
971 | ||
972 | ctx->dev = caam_jr_alloc(); | |
973 | ||
974 | if (IS_ERR(ctx->dev)) { | |
33fa46d7 | 975 | pr_err("Job Ring Device allocation for transform failed\n"); |
8c419778 TA |
976 | return PTR_ERR(ctx->dev); |
977 | } | |
978 | ||
979 | return 0; | |
980 | } | |
981 | ||
982 | /* Per session pkc's driver context cleanup function */ | |
983 | static void caam_rsa_exit_tfm(struct crypto_akcipher *tfm) | |
984 | { | |
985 | struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); | |
986 | struct caam_rsa_key *key = &ctx->key; | |
987 | ||
988 | caam_rsa_free_key(key); | |
989 | caam_jr_free(ctx->dev); | |
990 | } | |
991 | ||
992 | static struct akcipher_alg caam_rsa = { | |
993 | .encrypt = caam_rsa_enc, | |
994 | .decrypt = caam_rsa_dec, | |
995 | .sign = caam_rsa_dec, | |
996 | .verify = caam_rsa_enc, | |
997 | .set_pub_key = caam_rsa_set_pub_key, | |
998 | .set_priv_key = caam_rsa_set_priv_key, | |
999 | .max_size = caam_rsa_max_size, | |
1000 | .init = caam_rsa_init_tfm, | |
1001 | .exit = caam_rsa_exit_tfm, | |
8a2a0dd3 | 1002 | .reqsize = sizeof(struct caam_rsa_req_ctx), |
8c419778 TA |
1003 | .base = { |
1004 | .cra_name = "rsa", | |
1005 | .cra_driver_name = "rsa-caam", | |
1006 | .cra_priority = 3000, | |
1007 | .cra_module = THIS_MODULE, | |
1008 | .cra_ctxsize = sizeof(struct caam_rsa_ctx), | |
1009 | }, | |
1010 | }; | |
1011 | ||
1012 | /* Public Key Cryptography module initialization handler */ | |
1013 | static int __init caam_pkc_init(void) | |
1014 | { | |
1015 | struct device_node *dev_node; | |
1016 | struct platform_device *pdev; | |
1017 | struct device *ctrldev; | |
1018 | struct caam_drv_private *priv; | |
1019 | u32 cha_inst, pk_inst; | |
1020 | int err; | |
1021 | ||
1022 | dev_node = of_find_compatible_node(NULL, NULL, "fsl,sec-v4.0"); | |
1023 | if (!dev_node) { | |
1024 | dev_node = of_find_compatible_node(NULL, NULL, "fsl,sec4.0"); | |
1025 | if (!dev_node) | |
1026 | return -ENODEV; | |
1027 | } | |
1028 | ||
1029 | pdev = of_find_device_by_node(dev_node); | |
1030 | if (!pdev) { | |
1031 | of_node_put(dev_node); | |
1032 | return -ENODEV; | |
1033 | } | |
1034 | ||
1035 | ctrldev = &pdev->dev; | |
1036 | priv = dev_get_drvdata(ctrldev); | |
1037 | of_node_put(dev_node); | |
1038 | ||
1039 | /* | |
1040 | * If priv is NULL, it's probably because the caam driver wasn't | |
1041 | * properly initialized (e.g. RNG4 init failed). Thus, bail out here. | |
1042 | */ | |
1043 | if (!priv) | |
1044 | return -ENODEV; | |
1045 | ||
1046 | /* Determine public key hardware accelerator presence. */ | |
1047 | cha_inst = rd_reg32(&priv->ctrl->perfmon.cha_num_ls); | |
1048 | pk_inst = (cha_inst & CHA_ID_LS_PK_MASK) >> CHA_ID_LS_PK_SHIFT; | |
1049 | ||
1050 | /* Do not register algorithms if PKHA is not present. */ | |
1051 | if (!pk_inst) | |
1052 | return -ENODEV; | |
1053 | ||
1054 | err = crypto_register_akcipher(&caam_rsa); | |
1055 | if (err) | |
1056 | dev_warn(ctrldev, "%s alg registration failed\n", | |
1057 | caam_rsa.base.cra_driver_name); | |
1058 | else | |
1059 | dev_info(ctrldev, "caam pkc algorithms registered in /proc/crypto\n"); | |
1060 | ||
1061 | return err; | |
1062 | } | |
1063 | ||
1064 | static void __exit caam_pkc_exit(void) | |
1065 | { | |
1066 | crypto_unregister_akcipher(&caam_rsa); | |
1067 | } | |
1068 | ||
1069 | module_init(caam_pkc_init); | |
1070 | module_exit(caam_pkc_exit); | |
1071 | ||
1072 | MODULE_LICENSE("Dual BSD/GPL"); | |
1073 | MODULE_DESCRIPTION("FSL CAAM support for PKC functions of crypto API"); | |
1074 | MODULE_AUTHOR("Freescale Semiconductor"); |