1 // SPDX-License-Identifier: GPL-2.0-or-later <<
2 /* 1 /*
3 * Handle async block request by crypto hardwa 2 * Handle async block request by crypto hardware engine.
4 * 3 *
5 * Copyright (C) 2016 Linaro, Inc. 4 * Copyright (C) 2016 Linaro, Inc.
6 * 5 *
7 * Author: Baolin Wang <baolin.wang@linaro.org 6 * Author: Baolin Wang <baolin.wang@linaro.org>
>> 7 *
>> 8 * This program is free software; you can redistribute it and/or modify it
>> 9 * under the terms of the GNU General Public License as published by the Free
>> 10 * Software Foundation; either version 2 of the License, or (at your option)
>> 11 * any later version.
>> 12 *
8 */ 13 */
9 14
10 #include <crypto/internal/aead.h> <<
11 #include <crypto/internal/akcipher.h> <<
12 #include <crypto/internal/engine.h> <<
13 #include <crypto/internal/hash.h> <<
14 #include <crypto/internal/kpp.h> <<
15 #include <crypto/internal/skcipher.h> <<
16 #include <linux/err.h> 15 #include <linux/err.h>
17 #include <linux/delay.h> 16 #include <linux/delay.h>
18 #include <linux/device.h> !! 17 #include <crypto/engine.h>
19 #include <linux/kernel.h> !! 18 #include <crypto/internal/hash.h>
20 #include <linux/module.h> <<
21 #include <uapi/linux/sched/types.h> <<
22 #include "internal.h" 19 #include "internal.h"
23 20
24 #define CRYPTO_ENGINE_MAX_QLEN 10 21 #define CRYPTO_ENGINE_MAX_QLEN 10
25 22
26 /* Temporary algorithm flag used to indicate a <<
27 #define CRYPTO_ALG_ENGINE 0x200 <<
28 <<
29 struct crypto_engine_alg { <<
30 struct crypto_alg base; <<
31 struct crypto_engine_op op; <<
32 }; <<
33 <<
34 /** <<
35 * crypto_finalize_request - finalize one requ <<
36 * @engine: the hardware engine <<
37 * @req: the request need to be finalized <<
38 * @err: error number <<
39 */ <<
40 static void crypto_finalize_request(struct cry <<
41 struct cry <<
42 { <<
43 unsigned long flags; <<
44 <<
45 /* <<
46 * If hardware cannot enqueue more req <<
47 * and retry mechanism is not supporte <<
48 * make sure we are completing the cur <<
49 */ <<
50 if (!engine->retry_support) { <<
51 spin_lock_irqsave(&engine->que <<
52 if (engine->cur_req == req) { <<
53 engine->cur_req = NULL <<
54 } <<
55 spin_unlock_irqrestore(&engine <<
56 } <<
57 <<
58 lockdep_assert_in_softirq(); <<
59 crypto_request_complete(req, err); <<
60 <<
61 kthread_queue_work(engine->kworker, &e <<
62 } <<
63 <<
64 /** 23 /**
65 * crypto_pump_requests - dequeue one request 24 * crypto_pump_requests - dequeue one request from engine queue to process
66 * @engine: the hardware engine 25 * @engine: the hardware engine
67 * @in_kthread: true if we are in the context 26 * @in_kthread: true if we are in the context of the request pump thread
68 * 27 *
69 * This function checks if there is any reques 28 * This function checks if there is any request in the engine queue that
70 * needs processing and if so call out to the 29 * needs processing and if so call out to the driver to initialize hardware
71 * and handle each request. 30 * and handle each request.
72 */ 31 */
73 static void crypto_pump_requests(struct crypto 32 static void crypto_pump_requests(struct crypto_engine *engine,
74 bool in_kthre 33 bool in_kthread)
75 { 34 {
76 struct crypto_async_request *async_req 35 struct crypto_async_request *async_req, *backlog;
77 struct crypto_engine_alg *alg; !! 36 struct ahash_request *hreq;
78 struct crypto_engine_op *op; !! 37 struct ablkcipher_request *breq;
79 unsigned long flags; 38 unsigned long flags;
80 bool was_busy = false; 39 bool was_busy = false;
81 int ret; !! 40 int ret, rtype;
82 41
83 spin_lock_irqsave(&engine->queue_lock, 42 spin_lock_irqsave(&engine->queue_lock, flags);
84 43
85 /* Make sure we are not already runnin 44 /* Make sure we are not already running a request */
86 if (!engine->retry_support && engine-> !! 45 if (engine->cur_req)
87 goto out; 46 goto out;
88 47
89 /* If another context is idling then d 48 /* If another context is idling then defer */
90 if (engine->idling) { 49 if (engine->idling) {
91 kthread_queue_work(engine->kwo 50 kthread_queue_work(engine->kworker, &engine->pump_requests);
92 goto out; 51 goto out;
93 } 52 }
94 53
95 /* Check if the engine queue is idle * 54 /* Check if the engine queue is idle */
96 if (!crypto_queue_len(&engine->queue) 55 if (!crypto_queue_len(&engine->queue) || !engine->running) {
97 if (!engine->busy) 56 if (!engine->busy)
98 goto out; 57 goto out;
99 58
100 /* Only do teardown in the thr 59 /* Only do teardown in the thread */
101 if (!in_kthread) { 60 if (!in_kthread) {
102 kthread_queue_work(eng 61 kthread_queue_work(engine->kworker,
103 &en 62 &engine->pump_requests);
104 goto out; 63 goto out;
105 } 64 }
106 65
107 engine->busy = false; 66 engine->busy = false;
108 engine->idling = true; 67 engine->idling = true;
109 spin_unlock_irqrestore(&engine 68 spin_unlock_irqrestore(&engine->queue_lock, flags);
110 69
111 if (engine->unprepare_crypt_ha 70 if (engine->unprepare_crypt_hardware &&
112 engine->unprepare_crypt_ha 71 engine->unprepare_crypt_hardware(engine))
113 dev_err(engine->dev, " !! 72 pr_err("failed to unprepare crypt hardware\n");
114 73
115 spin_lock_irqsave(&engine->que 74 spin_lock_irqsave(&engine->queue_lock, flags);
116 engine->idling = false; 75 engine->idling = false;
117 goto out; 76 goto out;
118 } 77 }
119 78
120 start_request: <<
121 /* Get the fist request from the engin 79 /* Get the fist request from the engine queue to handle */
122 backlog = crypto_get_backlog(&engine-> 80 backlog = crypto_get_backlog(&engine->queue);
123 async_req = crypto_dequeue_request(&en 81 async_req = crypto_dequeue_request(&engine->queue);
124 if (!async_req) 82 if (!async_req)
125 goto out; 83 goto out;
126 84
127 /* !! 85 engine->cur_req = async_req;
128 * If hardware doesn't support the ret !! 86 if (backlog)
129 * keep track of the request we are pr !! 87 backlog->complete(backlog, -EINPROGRESS);
130 * We'll need it on completion (crypto <<
131 */ <<
132 if (!engine->retry_support) <<
133 engine->cur_req = async_req; <<
134 88
135 if (engine->busy) 89 if (engine->busy)
136 was_busy = true; 90 was_busy = true;
137 else 91 else
138 engine->busy = true; 92 engine->busy = true;
139 93
140 spin_unlock_irqrestore(&engine->queue_ 94 spin_unlock_irqrestore(&engine->queue_lock, flags);
141 95
>> 96 rtype = crypto_tfm_alg_type(engine->cur_req->tfm);
142 /* Until here we get the request need 97 /* Until here we get the request need to be encrypted successfully */
143 if (!was_busy && engine->prepare_crypt 98 if (!was_busy && engine->prepare_crypt_hardware) {
144 ret = engine->prepare_crypt_ha 99 ret = engine->prepare_crypt_hardware(engine);
145 if (ret) { 100 if (ret) {
146 dev_err(engine->dev, " !! 101 pr_err("failed to prepare crypt hardware\n");
147 goto req_err_1; !! 102 goto req_err;
148 } 103 }
149 } 104 }
150 105
151 if (async_req->tfm->__crt_alg->cra_fla !! 106 switch (rtype) {
152 alg = container_of(async_req-> !! 107 case CRYPTO_ALG_TYPE_AHASH:
153 struct cryp !! 108 hreq = ahash_request_cast(engine->cur_req);
154 op = &alg->op; !! 109 if (engine->prepare_hash_request) {
155 } else { !! 110 ret = engine->prepare_hash_request(engine, hreq);
156 dev_err(engine->dev, "failed t !! 111 if (ret) {
157 ret = -EINVAL; !! 112 pr_err("failed to prepare request: %d\n", ret);
158 goto req_err_1; !! 113 goto req_err;
159 } !! 114 }
160 !! 115 engine->cur_req_prepared = true;
161 ret = op->do_one_request(engine, async <<
162 <<
163 /* Request unsuccessfully executed by <<
164 if (ret < 0) { <<
165 /* <<
166 * If hardware queue is full ( <<
167 * regardless of backlog flag. <<
168 * Otherwise, unprepare and co <<
169 */ <<
170 if (!engine->retry_support || <<
171 (ret != -ENOSPC)) { <<
172 dev_err(engine->dev, <<
173 "Failed to do <<
174 ret); <<
175 goto req_err_1; <<
176 } 116 }
177 spin_lock_irqsave(&engine->que !! 117 ret = engine->hash_one_request(engine, hreq);
178 /* !! 118 if (ret) {
179 * If hardware was unable to e !! 119 pr_err("failed to hash one request from queue\n");
180 * back in front of crypto-eng !! 120 goto req_err;
181 * of requests. !! 121 }
182 */ !! 122 return;
183 crypto_enqueue_request_head(&e !! 123 case CRYPTO_ALG_TYPE_ABLKCIPHER:
184 !! 124 breq = ablkcipher_request_cast(engine->cur_req);
185 kthread_queue_work(engine->kwo !! 125 if (engine->prepare_cipher_request) {
186 goto out; !! 126 ret = engine->prepare_cipher_request(engine, breq);
>> 127 if (ret) {
>> 128 pr_err("failed to prepare request: %d\n", ret);
>> 129 goto req_err;
>> 130 }
>> 131 engine->cur_req_prepared = true;
>> 132 }
>> 133 ret = engine->cipher_one_request(engine, breq);
>> 134 if (ret) {
>> 135 pr_err("failed to cipher one request from queue\n");
>> 136 goto req_err;
>> 137 }
>> 138 return;
>> 139 default:
>> 140 pr_err("failed to prepare request of unknown type\n");
>> 141 return;
187 } 142 }
188 143
189 goto retry; !! 144 req_err:
190 !! 145 switch (rtype) {
191 req_err_1: !! 146 case CRYPTO_ALG_TYPE_AHASH:
192 crypto_request_complete(async_req, ret !! 147 hreq = ahash_request_cast(engine->cur_req);
193 !! 148 crypto_finalize_hash_request(engine, hreq, ret);
194 retry: !! 149 break;
195 if (backlog) !! 150 case CRYPTO_ALG_TYPE_ABLKCIPHER:
196 crypto_request_complete(backlo !! 151 breq = ablkcipher_request_cast(engine->cur_req);
197 !! 152 crypto_finalize_cipher_request(engine, breq, ret);
198 /* If retry mechanism is supported, se !! 153 break;
199 if (engine->retry_support) { <<
200 spin_lock_irqsave(&engine->que <<
201 goto start_request; <<
202 } 154 }
203 return; 155 return;
204 156
205 out: 157 out:
206 spin_unlock_irqrestore(&engine->queue_ 158 spin_unlock_irqrestore(&engine->queue_lock, flags);
207 <<
208 /* <<
209 * Batch requests is possible only if <<
210 * hardware can enqueue multiple reque <<
211 */ <<
212 if (engine->do_batch_requests) { <<
213 ret = engine->do_batch_request <<
214 if (ret) <<
215 dev_err(engine->dev, " <<
216 ret); <<
217 } <<
218 <<
219 return; <<
220 } 159 }
221 160
222 static void crypto_pump_work(struct kthread_wo 161 static void crypto_pump_work(struct kthread_work *work)
223 { 162 {
224 struct crypto_engine *engine = 163 struct crypto_engine *engine =
225 container_of(work, struct cryp 164 container_of(work, struct crypto_engine, pump_requests);
226 165
227 crypto_pump_requests(engine, true); 166 crypto_pump_requests(engine, true);
228 } 167 }
229 168
230 /** 169 /**
231 * crypto_transfer_request - transfer the new !! 170 * crypto_transfer_cipher_request - transfer the new request into the
>> 171 * enginequeue
232 * @engine: the hardware engine 172 * @engine: the hardware engine
233 * @req: the request need to be listed into th 173 * @req: the request need to be listed into the engine queue
234 * @need_pump: indicates whether queue the pum <<
235 */ 174 */
236 static int crypto_transfer_request(struct cryp !! 175 int crypto_transfer_cipher_request(struct crypto_engine *engine,
237 struct cryp !! 176 struct ablkcipher_request *req,
238 bool need_p 177 bool need_pump)
239 { 178 {
240 unsigned long flags; 179 unsigned long flags;
241 int ret; 180 int ret;
242 181
243 spin_lock_irqsave(&engine->queue_lock, 182 spin_lock_irqsave(&engine->queue_lock, flags);
244 183
245 if (!engine->running) { 184 if (!engine->running) {
246 spin_unlock_irqrestore(&engine 185 spin_unlock_irqrestore(&engine->queue_lock, flags);
247 return -ESHUTDOWN; 186 return -ESHUTDOWN;
248 } 187 }
249 188
250 ret = crypto_enqueue_request(&engine-> !! 189 ret = ablkcipher_enqueue_request(&engine->queue, req);
251 190
252 if (!engine->busy && need_pump) 191 if (!engine->busy && need_pump)
253 kthread_queue_work(engine->kwo 192 kthread_queue_work(engine->kworker, &engine->pump_requests);
254 193
255 spin_unlock_irqrestore(&engine->queue_ 194 spin_unlock_irqrestore(&engine->queue_lock, flags);
256 return ret; 195 return ret;
257 } 196 }
>> 197 EXPORT_SYMBOL_GPL(crypto_transfer_cipher_request);
258 198
259 /** 199 /**
260 * crypto_transfer_request_to_engine - transfe !! 200 * crypto_transfer_cipher_request_to_engine - transfer one request to list
261 * into the engine queue 201 * into the engine queue
262 * @engine: the hardware engine 202 * @engine: the hardware engine
263 * @req: the request need to be listed into th 203 * @req: the request need to be listed into the engine queue
264 */ 204 */
265 static int crypto_transfer_request_to_engine(s !! 205 int crypto_transfer_cipher_request_to_engine(struct crypto_engine *engine,
266 s !! 206 struct ablkcipher_request *req)
267 { 207 {
268 return crypto_transfer_request(engine, !! 208 return crypto_transfer_cipher_request(engine, req, true);
269 } 209 }
>> 210 EXPORT_SYMBOL_GPL(crypto_transfer_cipher_request_to_engine);
270 211
271 /** 212 /**
272 * crypto_transfer_aead_request_to_engine - tr !! 213 * crypto_transfer_hash_request - transfer the new request into the
273 * to list into the engine queue !! 214 * enginequeue
274 * @engine: the hardware engine 215 * @engine: the hardware engine
275 * @req: the request need to be listed into th 216 * @req: the request need to be listed into the engine queue
276 */ 217 */
277 int crypto_transfer_aead_request_to_engine(str !! 218 int crypto_transfer_hash_request(struct crypto_engine *engine,
278 str !! 219 struct ahash_request *req, bool need_pump)
279 { 220 {
280 return crypto_transfer_request_to_engi !! 221 unsigned long flags;
281 } !! 222 int ret;
282 EXPORT_SYMBOL_GPL(crypto_transfer_aead_request <<
283 223
284 /** !! 224 spin_lock_irqsave(&engine->queue_lock, flags);
285 * crypto_transfer_akcipher_request_to_engine !! 225
286 * to list into the engine queue !! 226 if (!engine->running) {
287 * @engine: the hardware engine !! 227 spin_unlock_irqrestore(&engine->queue_lock, flags);
288 * @req: the request need to be listed into th !! 228 return -ESHUTDOWN;
289 */ !! 229 }
290 int crypto_transfer_akcipher_request_to_engine !! 230
291 !! 231 ret = ahash_enqueue_request(&engine->queue, req);
292 { !! 232
293 return crypto_transfer_request_to_engi !! 233 if (!engine->busy && need_pump)
>> 234 kthread_queue_work(engine->kworker, &engine->pump_requests);
>> 235
>> 236 spin_unlock_irqrestore(&engine->queue_lock, flags);
>> 237 return ret;
294 } 238 }
295 EXPORT_SYMBOL_GPL(crypto_transfer_akcipher_req !! 239 EXPORT_SYMBOL_GPL(crypto_transfer_hash_request);
296 240
297 /** 241 /**
298 * crypto_transfer_hash_request_to_engine - tr !! 242 * crypto_transfer_hash_request_to_engine - transfer one request to list
299 * to list into the engine queue !! 243 * into the engine queue
300 * @engine: the hardware engine 244 * @engine: the hardware engine
301 * @req: the request need to be listed into th 245 * @req: the request need to be listed into the engine queue
302 */ 246 */
303 int crypto_transfer_hash_request_to_engine(str 247 int crypto_transfer_hash_request_to_engine(struct crypto_engine *engine,
304 str 248 struct ahash_request *req)
305 { 249 {
306 return crypto_transfer_request_to_engi !! 250 return crypto_transfer_hash_request(engine, req, true);
307 } 251 }
308 EXPORT_SYMBOL_GPL(crypto_transfer_hash_request 252 EXPORT_SYMBOL_GPL(crypto_transfer_hash_request_to_engine);
309 253
310 /** 254 /**
311 * crypto_transfer_kpp_request_to_engine - tra !! 255 * crypto_finalize_cipher_request - finalize one request if the request is done
312 * into the engine queue <<
313 * @engine: the hardware engine <<
314 * @req: the request need to be listed into th <<
315 */ <<
316 int crypto_transfer_kpp_request_to_engine(stru <<
317 stru <<
318 { <<
319 return crypto_transfer_request_to_engi <<
320 } <<
321 EXPORT_SYMBOL_GPL(crypto_transfer_kpp_request_ <<
322 <<
323 /** <<
324 * crypto_transfer_skcipher_request_to_engine <<
325 * to list into the engine queue <<
326 * @engine: the hardware engine <<
327 * @req: the request need to be listed into th <<
328 */ <<
329 int crypto_transfer_skcipher_request_to_engine <<
330 <<
331 { <<
332 return crypto_transfer_request_to_engi <<
333 } <<
334 EXPORT_SYMBOL_GPL(crypto_transfer_skcipher_req <<
335 <<
336 /** <<
337 * crypto_finalize_aead_request - finalize one <<
338 * the request is done <<
339 * @engine: the hardware engine 256 * @engine: the hardware engine
340 * @req: the request need to be finalized 257 * @req: the request need to be finalized
341 * @err: error number 258 * @err: error number
342 */ 259 */
343 void crypto_finalize_aead_request(struct crypt !! 260 void crypto_finalize_cipher_request(struct crypto_engine *engine,
344 struct aead_ !! 261 struct ablkcipher_request *req, int err)
345 { 262 {
346 return crypto_finalize_request(engine, !! 263 unsigned long flags;
347 } !! 264 bool finalize_cur_req = false;
348 EXPORT_SYMBOL_GPL(crypto_finalize_aead_request !! 265 int ret;
349 266
350 /** !! 267 spin_lock_irqsave(&engine->queue_lock, flags);
351 * crypto_finalize_akcipher_request - finalize !! 268 if (engine->cur_req == &req->base)
352 * the request is done !! 269 finalize_cur_req = true;
353 * @engine: the hardware engine !! 270 spin_unlock_irqrestore(&engine->queue_lock, flags);
354 * @req: the request need to be finalized !! 271
355 * @err: error number !! 272 if (finalize_cur_req) {
356 */ !! 273 if (engine->cur_req_prepared &&
357 void crypto_finalize_akcipher_request(struct c !! 274 engine->unprepare_cipher_request) {
358 struct a !! 275 ret = engine->unprepare_cipher_request(engine, req);
359 { !! 276 if (ret)
360 return crypto_finalize_request(engine, !! 277 pr_err("failed to unprepare request\n");
>> 278 }
>> 279 spin_lock_irqsave(&engine->queue_lock, flags);
>> 280 engine->cur_req = NULL;
>> 281 engine->cur_req_prepared = false;
>> 282 spin_unlock_irqrestore(&engine->queue_lock, flags);
>> 283 }
>> 284
>> 285 req->base.complete(&req->base, err);
>> 286
>> 287 kthread_queue_work(engine->kworker, &engine->pump_requests);
361 } 288 }
362 EXPORT_SYMBOL_GPL(crypto_finalize_akcipher_req !! 289 EXPORT_SYMBOL_GPL(crypto_finalize_cipher_request);
363 290
364 /** 291 /**
365 * crypto_finalize_hash_request - finalize one !! 292 * crypto_finalize_hash_request - finalize one request if the request is done
366 * the request is done <<
367 * @engine: the hardware engine 293 * @engine: the hardware engine
368 * @req: the request need to be finalized 294 * @req: the request need to be finalized
369 * @err: error number 295 * @err: error number
370 */ 296 */
371 void crypto_finalize_hash_request(struct crypt 297 void crypto_finalize_hash_request(struct crypto_engine *engine,
372 struct ahash 298 struct ahash_request *req, int err)
373 { 299 {
374 return crypto_finalize_request(engine, !! 300 unsigned long flags;
375 } !! 301 bool finalize_cur_req = false;
376 EXPORT_SYMBOL_GPL(crypto_finalize_hash_request !! 302 int ret;
377 303
378 /** !! 304 spin_lock_irqsave(&engine->queue_lock, flags);
379 * crypto_finalize_kpp_request - finalize one !! 305 if (engine->cur_req == &req->base)
380 * @engine: the hardware engine !! 306 finalize_cur_req = true;
381 * @req: the request need to be finalized !! 307 spin_unlock_irqrestore(&engine->queue_lock, flags);
382 * @err: error number <<
383 */ <<
384 void crypto_finalize_kpp_request(struct crypto <<
385 struct kpp_re <<
386 { <<
387 return crypto_finalize_request(engine, <<
388 } <<
389 EXPORT_SYMBOL_GPL(crypto_finalize_kpp_request) <<
390 308
391 /** !! 309 if (finalize_cur_req) {
392 * crypto_finalize_skcipher_request - finalize !! 310 if (engine->cur_req_prepared &&
393 * the request is done !! 311 engine->unprepare_hash_request) {
394 * @engine: the hardware engine !! 312 ret = engine->unprepare_hash_request(engine, req);
395 * @req: the request need to be finalized !! 313 if (ret)
396 * @err: error number !! 314 pr_err("failed to unprepare request\n");
397 */ !! 315 }
398 void crypto_finalize_skcipher_request(struct c !! 316 spin_lock_irqsave(&engine->queue_lock, flags);
399 struct s !! 317 engine->cur_req = NULL;
400 { !! 318 engine->cur_req_prepared = false;
401 return crypto_finalize_request(engine, !! 319 spin_unlock_irqrestore(&engine->queue_lock, flags);
>> 320 }
>> 321
>> 322 req->base.complete(&req->base, err);
>> 323
>> 324 kthread_queue_work(engine->kworker, &engine->pump_requests);
402 } 325 }
403 EXPORT_SYMBOL_GPL(crypto_finalize_skcipher_req !! 326 EXPORT_SYMBOL_GPL(crypto_finalize_hash_request);
404 327
405 /** 328 /**
406 * crypto_engine_start - start the hardware en 329 * crypto_engine_start - start the hardware engine
407 * @engine: the hardware engine need to be sta 330 * @engine: the hardware engine need to be started
408 * 331 *
409 * Return 0 on success, else on fail. 332 * Return 0 on success, else on fail.
410 */ 333 */
411 int crypto_engine_start(struct crypto_engine * 334 int crypto_engine_start(struct crypto_engine *engine)
412 { 335 {
413 unsigned long flags; 336 unsigned long flags;
414 337
415 spin_lock_irqsave(&engine->queue_lock, 338 spin_lock_irqsave(&engine->queue_lock, flags);
416 339
417 if (engine->running || engine->busy) { 340 if (engine->running || engine->busy) {
418 spin_unlock_irqrestore(&engine 341 spin_unlock_irqrestore(&engine->queue_lock, flags);
419 return -EBUSY; 342 return -EBUSY;
420 } 343 }
421 344
422 engine->running = true; 345 engine->running = true;
423 spin_unlock_irqrestore(&engine->queue_ 346 spin_unlock_irqrestore(&engine->queue_lock, flags);
424 347
425 kthread_queue_work(engine->kworker, &e 348 kthread_queue_work(engine->kworker, &engine->pump_requests);
426 349
427 return 0; 350 return 0;
428 } 351 }
429 EXPORT_SYMBOL_GPL(crypto_engine_start); 352 EXPORT_SYMBOL_GPL(crypto_engine_start);
430 353
431 /** 354 /**
432 * crypto_engine_stop - stop the hardware engi 355 * crypto_engine_stop - stop the hardware engine
433 * @engine: the hardware engine need to be sto 356 * @engine: the hardware engine need to be stopped
434 * 357 *
435 * Return 0 on success, else on fail. 358 * Return 0 on success, else on fail.
436 */ 359 */
437 int crypto_engine_stop(struct crypto_engine *e 360 int crypto_engine_stop(struct crypto_engine *engine)
438 { 361 {
439 unsigned long flags; 362 unsigned long flags;
440 unsigned int limit = 500; 363 unsigned int limit = 500;
441 int ret = 0; 364 int ret = 0;
442 365
443 spin_lock_irqsave(&engine->queue_lock, 366 spin_lock_irqsave(&engine->queue_lock, flags);
444 367
445 /* 368 /*
446 * If the engine queue is not empty or 369 * If the engine queue is not empty or the engine is on busy state,
447 * we need to wait for a while to pump 370 * we need to wait for a while to pump the requests of engine queue.
448 */ 371 */
449 while ((crypto_queue_len(&engine->queu 372 while ((crypto_queue_len(&engine->queue) || engine->busy) && limit--) {
450 spin_unlock_irqrestore(&engine 373 spin_unlock_irqrestore(&engine->queue_lock, flags);
451 msleep(20); 374 msleep(20);
452 spin_lock_irqsave(&engine->que 375 spin_lock_irqsave(&engine->queue_lock, flags);
453 } 376 }
454 377
455 if (crypto_queue_len(&engine->queue) | 378 if (crypto_queue_len(&engine->queue) || engine->busy)
456 ret = -EBUSY; 379 ret = -EBUSY;
457 else 380 else
458 engine->running = false; 381 engine->running = false;
459 382
460 spin_unlock_irqrestore(&engine->queue_ 383 spin_unlock_irqrestore(&engine->queue_lock, flags);
461 384
462 if (ret) 385 if (ret)
463 dev_warn(engine->dev, "could n !! 386 pr_warn("could not stop engine\n");
464 387
465 return ret; 388 return ret;
466 } 389 }
467 EXPORT_SYMBOL_GPL(crypto_engine_stop); 390 EXPORT_SYMBOL_GPL(crypto_engine_stop);
468 391
469 /** 392 /**
470 * crypto_engine_alloc_init_and_set - allocate !! 393 * crypto_engine_alloc_init - allocate crypto hardware engine structure and
471 * and initialize it by setting the maximum nu !! 394 * initialize it.
472 * crypto-engine queue. <<
473 * @dev: the device attached with one hardware 395 * @dev: the device attached with one hardware engine
474 * @retry_support: whether hardware has suppor <<
475 * @cbk_do_batch: pointer to a callback functi <<
476 * a batch of requests. <<
477 * This has the form: <<
478 * callback(struct crypto_engin <<
479 * where: <<
480 * engine: the crypto engine st <<
481 * @rt: whether this queue is set to run as a 396 * @rt: whether this queue is set to run as a realtime task
482 * @qlen: maximum size of the crypto-engine qu <<
483 * 397 *
484 * This must be called from context that can s 398 * This must be called from context that can sleep.
485 * Return: the crypto engine structure on succ 399 * Return: the crypto engine structure on success, else NULL.
486 */ 400 */
487 struct crypto_engine *crypto_engine_alloc_init !! 401 struct crypto_engine *crypto_engine_alloc_init(struct device *dev, bool rt)
488 <<
489 <<
490 <<
491 { 402 {
>> 403 struct sched_param param = { .sched_priority = MAX_RT_PRIO - 1 };
492 struct crypto_engine *engine; 404 struct crypto_engine *engine;
493 405
494 if (!dev) 406 if (!dev)
495 return NULL; 407 return NULL;
496 408
497 engine = devm_kzalloc(dev, sizeof(*eng 409 engine = devm_kzalloc(dev, sizeof(*engine), GFP_KERNEL);
498 if (!engine) 410 if (!engine)
499 return NULL; 411 return NULL;
500 412
501 engine->dev = dev; <<
502 engine->rt = rt; 413 engine->rt = rt;
503 engine->running = false; 414 engine->running = false;
504 engine->busy = false; 415 engine->busy = false;
505 engine->idling = false; 416 engine->idling = false;
506 engine->retry_support = retry_support; !! 417 engine->cur_req_prepared = false;
507 engine->priv_data = dev; 418 engine->priv_data = dev;
508 /* <<
509 * Batch requests is possible only if <<
510 * hardware has support for retry mech <<
511 */ <<
512 engine->do_batch_requests = retry_supp <<
513 <<
514 snprintf(engine->name, sizeof(engine-> 419 snprintf(engine->name, sizeof(engine->name),
515 "%s-engine", dev_name(dev)); 420 "%s-engine", dev_name(dev));
516 421
517 crypto_init_queue(&engine->queue, qlen !! 422 crypto_init_queue(&engine->queue, CRYPTO_ENGINE_MAX_QLEN);
518 spin_lock_init(&engine->queue_lock); 423 spin_lock_init(&engine->queue_lock);
519 424
520 engine->kworker = kthread_create_worke 425 engine->kworker = kthread_create_worker(0, "%s", engine->name);
521 if (IS_ERR(engine->kworker)) { 426 if (IS_ERR(engine->kworker)) {
522 dev_err(dev, "failed to create 427 dev_err(dev, "failed to create crypto request pump task\n");
523 return NULL; 428 return NULL;
524 } 429 }
525 kthread_init_work(&engine->pump_reques 430 kthread_init_work(&engine->pump_requests, crypto_pump_work);
526 431
527 if (engine->rt) { 432 if (engine->rt) {
528 dev_info(dev, "will run reques 433 dev_info(dev, "will run requests pump with realtime priority\n");
529 sched_set_fifo(engine->kworker !! 434 sched_setscheduler(engine->kworker->task, SCHED_FIFO, ¶m);
530 } 435 }
531 436
532 return engine; 437 return engine;
533 } 438 }
534 EXPORT_SYMBOL_GPL(crypto_engine_alloc_init_and <<
535 <<
536 /** <<
537 * crypto_engine_alloc_init - allocate crypto <<
538 * initialize it. <<
539 * @dev: the device attached with one hardware <<
540 * @rt: whether this queue is set to run as a <<
541 * <<
542 * This must be called from context that can s <<
543 * Return: the crypto engine structure on succ <<
544 */ <<
545 struct crypto_engine *crypto_engine_alloc_init <<
546 { <<
547 return crypto_engine_alloc_init_and_se <<
548 <<
549 } <<
550 EXPORT_SYMBOL_GPL(crypto_engine_alloc_init); 439 EXPORT_SYMBOL_GPL(crypto_engine_alloc_init);
551 440
552 /** 441 /**
553 * crypto_engine_exit - free the resources of 442 * crypto_engine_exit - free the resources of hardware engine when exit
554 * @engine: the hardware engine need to be fre 443 * @engine: the hardware engine need to be freed
>> 444 *
>> 445 * Return 0 for success.
555 */ 446 */
556 void crypto_engine_exit(struct crypto_engine * !! 447 int crypto_engine_exit(struct crypto_engine *engine)
557 { 448 {
558 int ret; 449 int ret;
559 450
560 ret = crypto_engine_stop(engine); 451 ret = crypto_engine_stop(engine);
561 if (ret) 452 if (ret)
562 return; !! 453 return ret;
563 454
564 kthread_destroy_worker(engine->kworker 455 kthread_destroy_worker(engine->kworker);
565 } <<
566 EXPORT_SYMBOL_GPL(crypto_engine_exit); <<
567 <<
568 int crypto_engine_register_aead(struct aead_en <<
569 { <<
570 if (!alg->op.do_one_request) <<
571 return -EINVAL; <<
572 <<
573 alg->base.base.cra_flags |= CRYPTO_ALG <<
574 <<
575 return crypto_register_aead(&alg->base <<
576 } <<
577 EXPORT_SYMBOL_GPL(crypto_engine_register_aead) <<
578 <<
579 void crypto_engine_unregister_aead(struct aead <<
580 { <<
581 crypto_unregister_aead(&alg->base); <<
582 } <<
583 EXPORT_SYMBOL_GPL(crypto_engine_unregister_aea <<
584 <<
585 int crypto_engine_register_aeads(struct aead_e <<
586 { <<
587 int i, ret; <<
588 <<
589 for (i = 0; i < count; i++) { <<
590 ret = crypto_engine_register_a <<
591 if (ret) <<
592 goto err; <<
593 } <<
594 456
595 return 0; 457 return 0;
596 <<
597 err: <<
598 crypto_engine_unregister_aeads(algs, i <<
599 <<
600 return ret; <<
601 } 458 }
602 EXPORT_SYMBOL_GPL(crypto_engine_register_aeads !! 459 EXPORT_SYMBOL_GPL(crypto_engine_exit);
603 <<
604 void crypto_engine_unregister_aeads(struct aea <<
605 { <<
606 int i; <<
607 <<
608 for (i = count - 1; i >= 0; --i) <<
609 crypto_engine_unregister_aead( <<
610 } <<
611 EXPORT_SYMBOL_GPL(crypto_engine_unregister_aea <<
612 <<
613 int crypto_engine_register_ahash(struct ahash_ <<
614 { <<
615 if (!alg->op.do_one_request) <<
616 return -EINVAL; <<
617 <<
618 alg->base.halg.base.cra_flags |= CRYPT <<
619 <<
620 return crypto_register_ahash(&alg->bas <<
621 } <<
622 EXPORT_SYMBOL_GPL(crypto_engine_register_ahash <<
623 <<
624 void crypto_engine_unregister_ahash(struct aha <<
625 { <<
626 crypto_unregister_ahash(&alg->base); <<
627 } <<
628 EXPORT_SYMBOL_GPL(crypto_engine_unregister_aha <<
629 <<
630 int crypto_engine_register_ahashes(struct ahas <<
631 { <<
632 int i, ret; <<
633 <<
634 for (i = 0; i < count; i++) { <<
635 ret = crypto_engine_register_a <<
636 if (ret) <<
637 goto err; <<
638 } <<
639 <<
640 return 0; <<
641 <<
642 err: <<
643 crypto_engine_unregister_ahashes(algs, <<
644 <<
645 return ret; <<
646 } <<
647 EXPORT_SYMBOL_GPL(crypto_engine_register_ahash <<
648 <<
649 void crypto_engine_unregister_ahashes(struct a <<
650 int coun <<
651 { <<
652 int i; <<
653 <<
654 for (i = count - 1; i >= 0; --i) <<
655 crypto_engine_unregister_ahash <<
656 } <<
657 EXPORT_SYMBOL_GPL(crypto_engine_unregister_aha <<
658 <<
659 int crypto_engine_register_akcipher(struct akc <<
660 { <<
661 if (!alg->op.do_one_request) <<
662 return -EINVAL; <<
663 <<
664 alg->base.base.cra_flags |= CRYPTO_ALG <<
665 <<
666 return crypto_register_akcipher(&alg-> <<
667 } <<
668 EXPORT_SYMBOL_GPL(crypto_engine_register_akcip <<
669 <<
670 void crypto_engine_unregister_akcipher(struct <<
671 { <<
672 crypto_unregister_akcipher(&alg->base) <<
673 } <<
674 EXPORT_SYMBOL_GPL(crypto_engine_unregister_akc <<
675 <<
676 int crypto_engine_register_kpp(struct kpp_engi <<
677 { <<
678 if (!alg->op.do_one_request) <<
679 return -EINVAL; <<
680 <<
681 alg->base.base.cra_flags |= CRYPTO_ALG <<
682 <<
683 return crypto_register_kpp(&alg->base) <<
684 } <<
685 EXPORT_SYMBOL_GPL(crypto_engine_register_kpp); <<
686 <<
687 void crypto_engine_unregister_kpp(struct kpp_e <<
688 { <<
689 crypto_unregister_kpp(&alg->base); <<
690 } <<
691 EXPORT_SYMBOL_GPL(crypto_engine_unregister_kpp <<
692 <<
693 int crypto_engine_register_skcipher(struct skc <<
694 { <<
695 if (!alg->op.do_one_request) <<
696 return -EINVAL; <<
697 <<
698 alg->base.base.cra_flags |= CRYPTO_ALG <<
699 <<
700 return crypto_register_skcipher(&alg-> <<
701 } <<
702 EXPORT_SYMBOL_GPL(crypto_engine_register_skcip <<
703 <<
704 void crypto_engine_unregister_skcipher(struct <<
705 { <<
706 return crypto_unregister_skcipher(&alg <<
707 } <<
708 EXPORT_SYMBOL_GPL(crypto_engine_unregister_skc <<
709 <<
710 int crypto_engine_register_skciphers(struct sk <<
711 int count <<
712 { <<
713 int i, ret; <<
714 <<
715 for (i = 0; i < count; i++) { <<
716 ret = crypto_engine_register_s <<
717 if (ret) <<
718 goto err; <<
719 } <<
720 <<
721 return 0; <<
722 <<
723 err: <<
724 crypto_engine_unregister_skciphers(alg <<
725 <<
726 return ret; <<
727 } <<
728 EXPORT_SYMBOL_GPL(crypto_engine_register_skcip <<
729 <<
730 void crypto_engine_unregister_skciphers(struct <<
731 int co <<
732 { <<
733 int i; <<
734 <<
735 for (i = count - 1; i >= 0; --i) <<
736 crypto_engine_unregister_skcip <<
737 } <<
738 EXPORT_SYMBOL_GPL(crypto_engine_unregister_skc <<
739 460
740 MODULE_LICENSE("GPL"); 461 MODULE_LICENSE("GPL");
741 MODULE_DESCRIPTION("Crypto hardware engine fra 462 MODULE_DESCRIPTION("Crypto hardware engine framework");
742 463
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