2 * Copyright (c) 2010-2014, The Linux Foundation. All rights reserved.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 and
6 * only version 2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
14 #include <linux/device.h>
15 #include <linux/interrupt.h>
16 #include <linux/types.h>
17 #include <crypto/aes.h>
18 #include <crypto/algapi.h>
19 #include <crypto/des.h>
23 static LIST_HEAD(ablkcipher_algs);
25 static void qce_ablkcipher_done(void *data)
27 struct crypto_async_request *async_req = data;
28 struct ablkcipher_request *req = ablkcipher_request_cast(async_req);
29 struct qce_cipher_reqctx *rctx = ablkcipher_request_ctx(req);
30 struct qce_alg_template *tmpl = to_cipher_tmpl(async_req->tfm);
31 struct qce_device *qce = tmpl->qce;
32 enum dma_data_direction dir_src, dir_dst;
37 diff_dst = (req->src != req->dst) ? true : false;
38 dir_src = diff_dst ? DMA_TO_DEVICE : DMA_BIDIRECTIONAL;
39 dir_dst = diff_dst ? DMA_FROM_DEVICE : DMA_BIDIRECTIONAL;
41 error = qce_dma_terminate_all(&qce->dma);
43 dev_dbg(qce->dev, "ablkcipher dma termination error (%d)\n",
47 qce_unmapsg(qce->dev, rctx->src_sg, rctx->src_nents, dir_src,
49 qce_unmapsg(qce->dev, rctx->dst_sg, rctx->dst_nents, dir_dst,
52 sg_free_table(&rctx->dst_tbl);
54 error = qce_check_status(qce, &status);
56 dev_dbg(qce->dev, "ablkcipher operation error (%x)\n", status);
58 qce->async_req_done(tmpl->qce, error);
62 qce_ablkcipher_async_req_handle(struct crypto_async_request *async_req)
64 struct ablkcipher_request *req = ablkcipher_request_cast(async_req);
65 struct qce_cipher_reqctx *rctx = ablkcipher_request_ctx(req);
66 struct crypto_ablkcipher *ablkcipher = crypto_ablkcipher_reqtfm(req);
67 struct qce_alg_template *tmpl = to_cipher_tmpl(async_req->tfm);
68 struct qce_device *qce = tmpl->qce;
69 enum dma_data_direction dir_src, dir_dst;
70 struct scatterlist *sg;
76 rctx->ivsize = crypto_ablkcipher_ivsize(ablkcipher);
77 rctx->cryptlen = req->nbytes;
79 diff_dst = (req->src != req->dst) ? true : false;
80 dir_src = diff_dst ? DMA_TO_DEVICE : DMA_BIDIRECTIONAL;
81 dir_dst = diff_dst ? DMA_FROM_DEVICE : DMA_BIDIRECTIONAL;
83 rctx->src_nents = qce_countsg(req->src, req->nbytes,
86 rctx->dst_nents = qce_countsg(req->dst, req->nbytes,
89 rctx->dst_nents = rctx->src_nents;
90 rctx->dst_chained = rctx->src_chained;
95 gfp = (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ?
96 GFP_KERNEL : GFP_ATOMIC;
98 ret = sg_alloc_table(&rctx->dst_tbl, rctx->dst_nents, gfp);
102 sg_init_one(&rctx->result_sg, qce->dma.result_buf, QCE_RESULT_BUF_SZ);
104 sg = qce_sgtable_add(&rctx->dst_tbl, req->dst);
110 sg = qce_sgtable_add(&rctx->dst_tbl, &rctx->result_sg);
117 rctx->dst_sg = rctx->dst_tbl.sgl;
119 ret = qce_mapsg(qce->dev, rctx->dst_sg, rctx->dst_nents, dir_dst,
125 ret = qce_mapsg(qce->dev, req->src, rctx->src_nents, dir_src,
128 goto error_unmap_dst;
129 rctx->src_sg = req->src;
131 rctx->src_sg = rctx->dst_sg;
134 ret = qce_dma_prep_sgs(&qce->dma, rctx->src_sg, rctx->src_nents,
135 rctx->dst_sg, rctx->dst_nents,
136 qce_ablkcipher_done, async_req);
138 goto error_unmap_src;
140 qce_dma_issue_pending(&qce->dma);
142 ret = qce_start(async_req, tmpl->crypto_alg_type, req->nbytes, 0);
144 goto error_terminate;
149 qce_dma_terminate_all(&qce->dma);
152 qce_unmapsg(qce->dev, req->src, rctx->src_nents, dir_src,
155 qce_unmapsg(qce->dev, rctx->dst_sg, rctx->dst_nents, dir_dst,
158 sg_free_table(&rctx->dst_tbl);
162 static int qce_ablkcipher_setkey(struct crypto_ablkcipher *ablk, const u8 *key,
165 struct crypto_tfm *tfm = crypto_ablkcipher_tfm(ablk);
166 struct qce_cipher_ctx *ctx = crypto_tfm_ctx(tfm);
167 unsigned long flags = to_cipher_tmpl(tfm)->alg_flags;
175 case AES_KEYSIZE_128:
176 case AES_KEYSIZE_256:
181 } else if (IS_DES(flags)) {
182 u32 tmp[DES_EXPKEY_WORDS];
184 ret = des_ekey(tmp, key);
185 if (!ret && crypto_ablkcipher_get_flags(ablk) &
186 CRYPTO_TFM_REQ_WEAK_KEY)
190 ctx->enc_keylen = keylen;
191 memcpy(ctx->enc_key, key, keylen);
194 ret = crypto_ablkcipher_setkey(ctx->fallback, key, keylen);
196 ctx->enc_keylen = keylen;
199 crypto_ablkcipher_set_flags(ablk, CRYPTO_TFM_RES_WEAK_KEY);
203 static int qce_ablkcipher_crypt(struct ablkcipher_request *req, int encrypt)
205 struct crypto_tfm *tfm =
206 crypto_ablkcipher_tfm(crypto_ablkcipher_reqtfm(req));
207 struct qce_cipher_ctx *ctx = crypto_tfm_ctx(tfm);
208 struct qce_cipher_reqctx *rctx = ablkcipher_request_ctx(req);
209 struct qce_alg_template *tmpl = to_cipher_tmpl(tfm);
212 rctx->flags = tmpl->alg_flags;
213 rctx->flags |= encrypt ? QCE_ENCRYPT : QCE_DECRYPT;
215 if (IS_AES(rctx->flags) && ctx->enc_keylen != AES_KEYSIZE_128 &&
216 ctx->enc_keylen != AES_KEYSIZE_256) {
217 ablkcipher_request_set_tfm(req, ctx->fallback);
218 ret = encrypt ? crypto_ablkcipher_encrypt(req) :
219 crypto_ablkcipher_decrypt(req);
220 ablkcipher_request_set_tfm(req, __crypto_ablkcipher_cast(tfm));
224 return tmpl->qce->async_req_enqueue(tmpl->qce, &req->base);
227 static int qce_ablkcipher_encrypt(struct ablkcipher_request *req)
229 return qce_ablkcipher_crypt(req, 1);
232 static int qce_ablkcipher_decrypt(struct ablkcipher_request *req)
234 return qce_ablkcipher_crypt(req, 0);
237 static int qce_ablkcipher_init(struct crypto_tfm *tfm)
239 struct qce_cipher_ctx *ctx = crypto_tfm_ctx(tfm);
241 memset(ctx, 0, sizeof(*ctx));
242 tfm->crt_ablkcipher.reqsize = sizeof(struct qce_cipher_reqctx);
244 ctx->fallback = crypto_alloc_ablkcipher(crypto_tfm_alg_name(tfm),
245 CRYPTO_ALG_TYPE_ABLKCIPHER,
247 CRYPTO_ALG_NEED_FALLBACK);
248 if (IS_ERR(ctx->fallback))
249 return PTR_ERR(ctx->fallback);
254 static void qce_ablkcipher_exit(struct crypto_tfm *tfm)
256 struct qce_cipher_ctx *ctx = crypto_tfm_ctx(tfm);
258 crypto_free_ablkcipher(ctx->fallback);
261 struct qce_ablkcipher_def {
264 const char *drv_name;
265 unsigned int blocksize;
267 unsigned int min_keysize;
268 unsigned int max_keysize;
271 static const struct qce_ablkcipher_def ablkcipher_def[] = {
273 .flags = QCE_ALG_AES | QCE_MODE_ECB,
275 .drv_name = "ecb-aes-qce",
276 .blocksize = AES_BLOCK_SIZE,
277 .ivsize = AES_BLOCK_SIZE,
278 .min_keysize = AES_MIN_KEY_SIZE,
279 .max_keysize = AES_MAX_KEY_SIZE,
282 .flags = QCE_ALG_AES | QCE_MODE_CBC,
284 .drv_name = "cbc-aes-qce",
285 .blocksize = AES_BLOCK_SIZE,
286 .ivsize = AES_BLOCK_SIZE,
287 .min_keysize = AES_MIN_KEY_SIZE,
288 .max_keysize = AES_MAX_KEY_SIZE,
291 .flags = QCE_ALG_AES | QCE_MODE_CTR,
293 .drv_name = "ctr-aes-qce",
294 .blocksize = AES_BLOCK_SIZE,
295 .ivsize = AES_BLOCK_SIZE,
296 .min_keysize = AES_MIN_KEY_SIZE,
297 .max_keysize = AES_MAX_KEY_SIZE,
300 .flags = QCE_ALG_AES | QCE_MODE_XTS,
302 .drv_name = "xts-aes-qce",
303 .blocksize = AES_BLOCK_SIZE,
304 .ivsize = AES_BLOCK_SIZE,
305 .min_keysize = AES_MIN_KEY_SIZE,
306 .max_keysize = AES_MAX_KEY_SIZE,
309 .flags = QCE_ALG_DES | QCE_MODE_ECB,
311 .drv_name = "ecb-des-qce",
312 .blocksize = DES_BLOCK_SIZE,
314 .min_keysize = DES_KEY_SIZE,
315 .max_keysize = DES_KEY_SIZE,
318 .flags = QCE_ALG_DES | QCE_MODE_CBC,
320 .drv_name = "cbc-des-qce",
321 .blocksize = DES_BLOCK_SIZE,
322 .ivsize = DES_BLOCK_SIZE,
323 .min_keysize = DES_KEY_SIZE,
324 .max_keysize = DES_KEY_SIZE,
327 .flags = QCE_ALG_3DES | QCE_MODE_ECB,
328 .name = "ecb(des3_ede)",
329 .drv_name = "ecb-3des-qce",
330 .blocksize = DES3_EDE_BLOCK_SIZE,
332 .min_keysize = DES3_EDE_KEY_SIZE,
333 .max_keysize = DES3_EDE_KEY_SIZE,
336 .flags = QCE_ALG_3DES | QCE_MODE_CBC,
337 .name = "cbc(des3_ede)",
338 .drv_name = "cbc-3des-qce",
339 .blocksize = DES3_EDE_BLOCK_SIZE,
340 .ivsize = DES3_EDE_BLOCK_SIZE,
341 .min_keysize = DES3_EDE_KEY_SIZE,
342 .max_keysize = DES3_EDE_KEY_SIZE,
346 static int qce_ablkcipher_register_one(const struct qce_ablkcipher_def *def,
347 struct qce_device *qce)
349 struct qce_alg_template *tmpl;
350 struct crypto_alg *alg;
353 tmpl = kzalloc(sizeof(*tmpl), GFP_KERNEL);
357 alg = &tmpl->alg.crypto;
359 snprintf(alg->cra_name, CRYPTO_MAX_ALG_NAME, "%s", def->name);
360 snprintf(alg->cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s",
363 alg->cra_blocksize = def->blocksize;
364 alg->cra_ablkcipher.ivsize = def->ivsize;
365 alg->cra_ablkcipher.min_keysize = def->min_keysize;
366 alg->cra_ablkcipher.max_keysize = def->max_keysize;
367 alg->cra_ablkcipher.setkey = qce_ablkcipher_setkey;
368 alg->cra_ablkcipher.encrypt = qce_ablkcipher_encrypt;
369 alg->cra_ablkcipher.decrypt = qce_ablkcipher_decrypt;
371 alg->cra_priority = 300;
372 alg->cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC |
373 CRYPTO_ALG_NEED_FALLBACK;
374 alg->cra_ctxsize = sizeof(struct qce_cipher_ctx);
375 alg->cra_alignmask = 0;
376 alg->cra_type = &crypto_ablkcipher_type;
377 alg->cra_module = THIS_MODULE;
378 alg->cra_init = qce_ablkcipher_init;
379 alg->cra_exit = qce_ablkcipher_exit;
380 INIT_LIST_HEAD(&alg->cra_list);
382 INIT_LIST_HEAD(&tmpl->entry);
383 tmpl->crypto_alg_type = CRYPTO_ALG_TYPE_ABLKCIPHER;
384 tmpl->alg_flags = def->flags;
387 ret = crypto_register_alg(alg);
390 dev_err(qce->dev, "%s registration failed\n", alg->cra_name);
394 list_add_tail(&tmpl->entry, &ablkcipher_algs);
395 dev_dbg(qce->dev, "%s is registered\n", alg->cra_name);
399 static void qce_ablkcipher_unregister(struct qce_device *qce)
401 struct qce_alg_template *tmpl, *n;
403 list_for_each_entry_safe(tmpl, n, &ablkcipher_algs, entry) {
404 crypto_unregister_alg(&tmpl->alg.crypto);
405 list_del(&tmpl->entry);
410 static int qce_ablkcipher_register(struct qce_device *qce)
414 for (i = 0; i < ARRAY_SIZE(ablkcipher_def); i++) {
415 ret = qce_ablkcipher_register_one(&ablkcipher_def[i], qce);
422 qce_ablkcipher_unregister(qce);
426 const struct qce_algo_ops ablkcipher_ops = {
427 .type = CRYPTO_ALG_TYPE_ABLKCIPHER,
428 .register_algs = qce_ablkcipher_register,
429 .unregister_algs = qce_ablkcipher_unregister,
430 .async_req_handle = qce_ablkcipher_async_req_handle,