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> <<
20 #include <linux/module.h> <<
21 #include <uapi/linux/sched/types.h> 18 #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 /** 23 /**
35 * crypto_finalize_request - finalize one requ 24 * crypto_finalize_request - finalize one request if the request is done
36 * @engine: the hardware engine 25 * @engine: the hardware engine
37 * @req: the request need to be finalized 26 * @req: the request need to be finalized
38 * @err: error number 27 * @err: error number
39 */ 28 */
40 static void crypto_finalize_request(struct cry 29 static void crypto_finalize_request(struct crypto_engine *engine,
41 struct cry !! 30 struct crypto_async_request *req, int err)
42 { 31 {
43 unsigned long flags; 32 unsigned long flags;
>> 33 bool finalize_cur_req = false;
>> 34 int ret;
>> 35 struct crypto_engine_ctx *enginectx;
44 36
45 /* !! 37 spin_lock_irqsave(&engine->queue_lock, flags);
46 * If hardware cannot enqueue more req !! 38 if (engine->cur_req == req)
47 * and retry mechanism is not supporte !! 39 finalize_cur_req = true;
48 * make sure we are completing the cur !! 40 spin_unlock_irqrestore(&engine->queue_lock, flags);
49 */ !! 41
50 if (!engine->retry_support) { !! 42 if (finalize_cur_req) {
51 spin_lock_irqsave(&engine->que !! 43 enginectx = crypto_tfm_ctx(req->tfm);
52 if (engine->cur_req == req) { !! 44 if (engine->cur_req_prepared &&
53 engine->cur_req = NULL !! 45 enginectx->op.unprepare_request) {
>> 46 ret = enginectx->op.unprepare_request(engine, req);
>> 47 if (ret)
>> 48 dev_err(engine->dev, "failed to unprepare request\n");
54 } 49 }
>> 50 spin_lock_irqsave(&engine->queue_lock, flags);
>> 51 engine->cur_req = NULL;
>> 52 engine->cur_req_prepared = false;
55 spin_unlock_irqrestore(&engine 53 spin_unlock_irqrestore(&engine->queue_lock, flags);
56 } 54 }
57 55
58 lockdep_assert_in_softirq(); !! 56 req->complete(req, err);
59 crypto_request_complete(req, err); <<
60 57
61 kthread_queue_work(engine->kworker, &e 58 kthread_queue_work(engine->kworker, &engine->pump_requests);
62 } 59 }
63 60
64 /** 61 /**
65 * crypto_pump_requests - dequeue one request 62 * crypto_pump_requests - dequeue one request from engine queue to process
66 * @engine: the hardware engine 63 * @engine: the hardware engine
67 * @in_kthread: true if we are in the context 64 * @in_kthread: true if we are in the context of the request pump thread
68 * 65 *
69 * This function checks if there is any reques 66 * This function checks if there is any request in the engine queue that
70 * needs processing and if so call out to the 67 * needs processing and if so call out to the driver to initialize hardware
71 * and handle each request. 68 * and handle each request.
72 */ 69 */
73 static void crypto_pump_requests(struct crypto 70 static void crypto_pump_requests(struct crypto_engine *engine,
74 bool in_kthre 71 bool in_kthread)
75 { 72 {
76 struct crypto_async_request *async_req 73 struct crypto_async_request *async_req, *backlog;
77 struct crypto_engine_alg *alg; <<
78 struct crypto_engine_op *op; <<
79 unsigned long flags; 74 unsigned long flags;
80 bool was_busy = false; 75 bool was_busy = false;
81 int ret; 76 int ret;
>> 77 struct crypto_engine_ctx *enginectx;
82 78
83 spin_lock_irqsave(&engine->queue_lock, 79 spin_lock_irqsave(&engine->queue_lock, flags);
84 80
85 /* Make sure we are not already runnin 81 /* Make sure we are not already running a request */
86 if (!engine->retry_support && engine-> !! 82 if (engine->cur_req)
87 goto out; 83 goto out;
88 84
89 /* If another context is idling then d 85 /* If another context is idling then defer */
90 if (engine->idling) { 86 if (engine->idling) {
91 kthread_queue_work(engine->kwo 87 kthread_queue_work(engine->kworker, &engine->pump_requests);
92 goto out; 88 goto out;
93 } 89 }
94 90
95 /* Check if the engine queue is idle * 91 /* Check if the engine queue is idle */
96 if (!crypto_queue_len(&engine->queue) 92 if (!crypto_queue_len(&engine->queue) || !engine->running) {
97 if (!engine->busy) 93 if (!engine->busy)
98 goto out; 94 goto out;
99 95
100 /* Only do teardown in the thr 96 /* Only do teardown in the thread */
101 if (!in_kthread) { 97 if (!in_kthread) {
102 kthread_queue_work(eng 98 kthread_queue_work(engine->kworker,
103 &en 99 &engine->pump_requests);
104 goto out; 100 goto out;
105 } 101 }
106 102
107 engine->busy = false; 103 engine->busy = false;
108 engine->idling = true; 104 engine->idling = true;
109 spin_unlock_irqrestore(&engine 105 spin_unlock_irqrestore(&engine->queue_lock, flags);
110 106
111 if (engine->unprepare_crypt_ha 107 if (engine->unprepare_crypt_hardware &&
112 engine->unprepare_crypt_ha 108 engine->unprepare_crypt_hardware(engine))
113 dev_err(engine->dev, " 109 dev_err(engine->dev, "failed to unprepare crypt hardware\n");
114 110
115 spin_lock_irqsave(&engine->que 111 spin_lock_irqsave(&engine->queue_lock, flags);
116 engine->idling = false; 112 engine->idling = false;
117 goto out; 113 goto out;
118 } 114 }
119 115
120 start_request: <<
121 /* Get the fist request from the engin 116 /* Get the fist request from the engine queue to handle */
122 backlog = crypto_get_backlog(&engine-> 117 backlog = crypto_get_backlog(&engine->queue);
123 async_req = crypto_dequeue_request(&en 118 async_req = crypto_dequeue_request(&engine->queue);
124 if (!async_req) 119 if (!async_req)
125 goto out; 120 goto out;
126 121
127 /* !! 122 engine->cur_req = async_req;
128 * If hardware doesn't support the ret !! 123 if (backlog)
129 * keep track of the request we are pr !! 124 backlog->complete(backlog, -EINPROGRESS);
130 * We'll need it on completion (crypto <<
131 */ <<
132 if (!engine->retry_support) <<
133 engine->cur_req = async_req; <<
134 125
135 if (engine->busy) 126 if (engine->busy)
136 was_busy = true; 127 was_busy = true;
137 else 128 else
138 engine->busy = true; 129 engine->busy = true;
139 130
140 spin_unlock_irqrestore(&engine->queue_ 131 spin_unlock_irqrestore(&engine->queue_lock, flags);
141 132
142 /* Until here we get the request need 133 /* Until here we get the request need to be encrypted successfully */
143 if (!was_busy && engine->prepare_crypt 134 if (!was_busy && engine->prepare_crypt_hardware) {
144 ret = engine->prepare_crypt_ha 135 ret = engine->prepare_crypt_hardware(engine);
145 if (ret) { 136 if (ret) {
146 dev_err(engine->dev, " 137 dev_err(engine->dev, "failed to prepare crypt hardware\n");
147 goto req_err_1; !! 138 goto req_err;
148 } 139 }
149 } 140 }
150 141
151 if (async_req->tfm->__crt_alg->cra_fla !! 142 enginectx = crypto_tfm_ctx(async_req->tfm);
152 alg = container_of(async_req-> <<
153 struct cryp <<
154 op = &alg->op; <<
155 } else { <<
156 dev_err(engine->dev, "failed t <<
157 ret = -EINVAL; <<
158 goto req_err_1; <<
159 } <<
160 143
161 ret = op->do_one_request(engine, async !! 144 if (enginectx->op.prepare_request) {
162 !! 145 ret = enginectx->op.prepare_request(engine, async_req);
163 /* Request unsuccessfully executed by !! 146 if (ret) {
164 if (ret < 0) { !! 147 dev_err(engine->dev, "failed to prepare request: %d\n",
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); 148 ret);
175 goto req_err_1; !! 149 goto req_err;
176 } 150 }
177 spin_lock_irqsave(&engine->que !! 151 engine->cur_req_prepared = true;
178 /* <<
179 * If hardware was unable to e <<
180 * back in front of crypto-eng <<
181 * of requests. <<
182 */ <<
183 crypto_enqueue_request_head(&e <<
184 <<
185 kthread_queue_work(engine->kwo <<
186 goto out; <<
187 } 152 }
188 !! 153 if (!enginectx->op.do_one_request) {
189 goto retry; !! 154 dev_err(engine->dev, "failed to do request\n");
190 !! 155 ret = -EINVAL;
191 req_err_1: !! 156 goto req_err;
192 crypto_request_complete(async_req, ret <<
193 <<
194 retry: <<
195 if (backlog) <<
196 crypto_request_complete(backlo <<
197 <<
198 /* If retry mechanism is supported, se <<
199 if (engine->retry_support) { <<
200 spin_lock_irqsave(&engine->que <<
201 goto start_request; <<
202 } 157 }
>> 158 ret = enginectx->op.do_one_request(engine, async_req);
>> 159 if (ret) {
>> 160 dev_err(engine->dev, "Failed to do one request from queue: %d\n", ret);
>> 161 goto req_err;
>> 162 }
>> 163 return;
>> 164
>> 165 req_err:
>> 166 crypto_finalize_request(engine, async_req, ret);
203 return; 167 return;
204 168
205 out: 169 out:
206 spin_unlock_irqrestore(&engine->queue_ 170 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 } 171 }
221 172
222 static void crypto_pump_work(struct kthread_wo 173 static void crypto_pump_work(struct kthread_work *work)
223 { 174 {
224 struct crypto_engine *engine = 175 struct crypto_engine *engine =
225 container_of(work, struct cryp 176 container_of(work, struct crypto_engine, pump_requests);
226 177
227 crypto_pump_requests(engine, true); 178 crypto_pump_requests(engine, true);
228 } 179 }
229 180
230 /** 181 /**
231 * crypto_transfer_request - transfer the new 182 * crypto_transfer_request - transfer the new request into the engine queue
232 * @engine: the hardware engine 183 * @engine: the hardware engine
233 * @req: the request need to be listed into th 184 * @req: the request need to be listed into the engine queue
234 * @need_pump: indicates whether queue the pum <<
235 */ 185 */
236 static int crypto_transfer_request(struct cryp 186 static int crypto_transfer_request(struct crypto_engine *engine,
237 struct cryp 187 struct crypto_async_request *req,
238 bool need_p 188 bool need_pump)
239 { 189 {
240 unsigned long flags; 190 unsigned long flags;
241 int ret; 191 int ret;
242 192
243 spin_lock_irqsave(&engine->queue_lock, 193 spin_lock_irqsave(&engine->queue_lock, flags);
244 194
245 if (!engine->running) { 195 if (!engine->running) {
246 spin_unlock_irqrestore(&engine 196 spin_unlock_irqrestore(&engine->queue_lock, flags);
247 return -ESHUTDOWN; 197 return -ESHUTDOWN;
248 } 198 }
249 199
250 ret = crypto_enqueue_request(&engine-> 200 ret = crypto_enqueue_request(&engine->queue, req);
251 201
252 if (!engine->busy && need_pump) 202 if (!engine->busy && need_pump)
253 kthread_queue_work(engine->kwo 203 kthread_queue_work(engine->kworker, &engine->pump_requests);
254 204
255 spin_unlock_irqrestore(&engine->queue_ 205 spin_unlock_irqrestore(&engine->queue_lock, flags);
256 return ret; 206 return ret;
257 } 207 }
258 208
259 /** 209 /**
260 * crypto_transfer_request_to_engine - transfe 210 * crypto_transfer_request_to_engine - transfer one request to list
261 * into the engine queue 211 * into the engine queue
262 * @engine: the hardware engine 212 * @engine: the hardware engine
263 * @req: the request need to be listed into th 213 * @req: the request need to be listed into the engine queue
264 */ 214 */
265 static int crypto_transfer_request_to_engine(s 215 static int crypto_transfer_request_to_engine(struct crypto_engine *engine,
266 s 216 struct crypto_async_request *req)
267 { 217 {
268 return crypto_transfer_request(engine, 218 return crypto_transfer_request(engine, req, true);
269 } 219 }
270 220
271 /** 221 /**
>> 222 * crypto_transfer_ablkcipher_request_to_engine - transfer one ablkcipher_request
>> 223 * to list into the engine queue
>> 224 * @engine: the hardware engine
>> 225 * @req: the request need to be listed into the engine queue
>> 226 * TODO: Remove this function when skcipher conversion is finished
>> 227 */
>> 228 int crypto_transfer_ablkcipher_request_to_engine(struct crypto_engine *engine,
>> 229 struct ablkcipher_request *req)
>> 230 {
>> 231 return crypto_transfer_request_to_engine(engine, &req->base);
>> 232 }
>> 233 EXPORT_SYMBOL_GPL(crypto_transfer_ablkcipher_request_to_engine);
>> 234
>> 235 /**
272 * crypto_transfer_aead_request_to_engine - tr 236 * crypto_transfer_aead_request_to_engine - transfer one aead_request
273 * to list into the engine queue 237 * to list into the engine queue
274 * @engine: the hardware engine 238 * @engine: the hardware engine
275 * @req: the request need to be listed into th 239 * @req: the request need to be listed into the engine queue
276 */ 240 */
277 int crypto_transfer_aead_request_to_engine(str 241 int crypto_transfer_aead_request_to_engine(struct crypto_engine *engine,
278 str 242 struct aead_request *req)
279 { 243 {
280 return crypto_transfer_request_to_engi 244 return crypto_transfer_request_to_engine(engine, &req->base);
281 } 245 }
282 EXPORT_SYMBOL_GPL(crypto_transfer_aead_request 246 EXPORT_SYMBOL_GPL(crypto_transfer_aead_request_to_engine);
283 247
284 /** 248 /**
285 * crypto_transfer_akcipher_request_to_engine 249 * crypto_transfer_akcipher_request_to_engine - transfer one akcipher_request
286 * to list into the engine queue 250 * to list into the engine queue
287 * @engine: the hardware engine 251 * @engine: the hardware engine
288 * @req: the request need to be listed into th 252 * @req: the request need to be listed into the engine queue
289 */ 253 */
290 int crypto_transfer_akcipher_request_to_engine 254 int crypto_transfer_akcipher_request_to_engine(struct crypto_engine *engine,
291 255 struct akcipher_request *req)
292 { 256 {
293 return crypto_transfer_request_to_engi 257 return crypto_transfer_request_to_engine(engine, &req->base);
294 } 258 }
295 EXPORT_SYMBOL_GPL(crypto_transfer_akcipher_req 259 EXPORT_SYMBOL_GPL(crypto_transfer_akcipher_request_to_engine);
296 260
297 /** 261 /**
298 * crypto_transfer_hash_request_to_engine - tr 262 * crypto_transfer_hash_request_to_engine - transfer one ahash_request
299 * to list into the engine queue 263 * to list into the engine queue
300 * @engine: the hardware engine 264 * @engine: the hardware engine
301 * @req: the request need to be listed into th 265 * @req: the request need to be listed into the engine queue
302 */ 266 */
303 int crypto_transfer_hash_request_to_engine(str 267 int crypto_transfer_hash_request_to_engine(struct crypto_engine *engine,
304 str 268 struct ahash_request *req)
305 { 269 {
306 return crypto_transfer_request_to_engi 270 return crypto_transfer_request_to_engine(engine, &req->base);
307 } 271 }
308 EXPORT_SYMBOL_GPL(crypto_transfer_hash_request 272 EXPORT_SYMBOL_GPL(crypto_transfer_hash_request_to_engine);
309 273
310 /** 274 /**
311 * crypto_transfer_kpp_request_to_engine - tra !! 275 * crypto_transfer_skcipher_request_to_engine - transfer one skcipher_request
312 * into the engine queue !! 276 * to list into the engine queue
313 * @engine: the hardware engine 277 * @engine: the hardware engine
314 * @req: the request need to be listed into th 278 * @req: the request need to be listed into the engine queue
315 */ 279 */
316 int crypto_transfer_kpp_request_to_engine(stru !! 280 int crypto_transfer_skcipher_request_to_engine(struct crypto_engine *engine,
317 stru !! 281 struct skcipher_request *req)
318 { 282 {
319 return crypto_transfer_request_to_engi 283 return crypto_transfer_request_to_engine(engine, &req->base);
320 } 284 }
321 EXPORT_SYMBOL_GPL(crypto_transfer_kpp_request_ !! 285 EXPORT_SYMBOL_GPL(crypto_transfer_skcipher_request_to_engine);
322 286
323 /** 287 /**
324 * crypto_transfer_skcipher_request_to_engine !! 288 * crypto_finalize_ablkcipher_request - finalize one ablkcipher_request if
325 * to list into the engine queue !! 289 * the request is done
326 * @engine: the hardware engine 290 * @engine: the hardware engine
327 * @req: the request need to be listed into th !! 291 * @req: the request need to be finalized
>> 292 * @err: error number
>> 293 * TODO: Remove this function when skcipher conversion is finished
328 */ 294 */
329 int crypto_transfer_skcipher_request_to_engine !! 295 void crypto_finalize_ablkcipher_request(struct crypto_engine *engine,
330 !! 296 struct ablkcipher_request *req, int err)
331 { 297 {
332 return crypto_transfer_request_to_engi !! 298 return crypto_finalize_request(engine, &req->base, err);
333 } 299 }
334 EXPORT_SYMBOL_GPL(crypto_transfer_skcipher_req !! 300 EXPORT_SYMBOL_GPL(crypto_finalize_ablkcipher_request);
335 301
336 /** 302 /**
337 * crypto_finalize_aead_request - finalize one 303 * crypto_finalize_aead_request - finalize one aead_request if
338 * the request is done 304 * the request is done
339 * @engine: the hardware engine 305 * @engine: the hardware engine
340 * @req: the request need to be finalized 306 * @req: the request need to be finalized
341 * @err: error number 307 * @err: error number
342 */ 308 */
343 void crypto_finalize_aead_request(struct crypt 309 void crypto_finalize_aead_request(struct crypto_engine *engine,
344 struct aead_ 310 struct aead_request *req, int err)
345 { 311 {
346 return crypto_finalize_request(engine, 312 return crypto_finalize_request(engine, &req->base, err);
347 } 313 }
348 EXPORT_SYMBOL_GPL(crypto_finalize_aead_request 314 EXPORT_SYMBOL_GPL(crypto_finalize_aead_request);
349 315
350 /** 316 /**
351 * crypto_finalize_akcipher_request - finalize 317 * crypto_finalize_akcipher_request - finalize one akcipher_request if
352 * the request is done 318 * the request is done
353 * @engine: the hardware engine 319 * @engine: the hardware engine
354 * @req: the request need to be finalized 320 * @req: the request need to be finalized
355 * @err: error number 321 * @err: error number
356 */ 322 */
357 void crypto_finalize_akcipher_request(struct c 323 void crypto_finalize_akcipher_request(struct crypto_engine *engine,
358 struct a 324 struct akcipher_request *req, int err)
359 { 325 {
360 return crypto_finalize_request(engine, 326 return crypto_finalize_request(engine, &req->base, err);
361 } 327 }
362 EXPORT_SYMBOL_GPL(crypto_finalize_akcipher_req 328 EXPORT_SYMBOL_GPL(crypto_finalize_akcipher_request);
363 329
364 /** 330 /**
365 * crypto_finalize_hash_request - finalize one 331 * crypto_finalize_hash_request - finalize one ahash_request if
366 * the request is done 332 * the request is done
367 * @engine: the hardware engine 333 * @engine: the hardware engine
368 * @req: the request need to be finalized 334 * @req: the request need to be finalized
369 * @err: error number 335 * @err: error number
370 */ 336 */
371 void crypto_finalize_hash_request(struct crypt 337 void crypto_finalize_hash_request(struct crypto_engine *engine,
372 struct ahash 338 struct ahash_request *req, int err)
373 { 339 {
374 return crypto_finalize_request(engine, 340 return crypto_finalize_request(engine, &req->base, err);
375 } 341 }
376 EXPORT_SYMBOL_GPL(crypto_finalize_hash_request 342 EXPORT_SYMBOL_GPL(crypto_finalize_hash_request);
377 343
378 /** 344 /**
379 * crypto_finalize_kpp_request - finalize one <<
380 * @engine: the hardware engine <<
381 * @req: the request need to be finalized <<
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 <<
391 /** <<
392 * crypto_finalize_skcipher_request - finalize 345 * crypto_finalize_skcipher_request - finalize one skcipher_request if
393 * the request is done 346 * the request is done
394 * @engine: the hardware engine 347 * @engine: the hardware engine
395 * @req: the request need to be finalized 348 * @req: the request need to be finalized
396 * @err: error number 349 * @err: error number
397 */ 350 */
398 void crypto_finalize_skcipher_request(struct c 351 void crypto_finalize_skcipher_request(struct crypto_engine *engine,
399 struct s 352 struct skcipher_request *req, int err)
400 { 353 {
401 return crypto_finalize_request(engine, 354 return crypto_finalize_request(engine, &req->base, err);
402 } 355 }
403 EXPORT_SYMBOL_GPL(crypto_finalize_skcipher_req 356 EXPORT_SYMBOL_GPL(crypto_finalize_skcipher_request);
404 357
405 /** 358 /**
406 * crypto_engine_start - start the hardware en 359 * crypto_engine_start - start the hardware engine
407 * @engine: the hardware engine need to be sta 360 * @engine: the hardware engine need to be started
408 * 361 *
409 * Return 0 on success, else on fail. 362 * Return 0 on success, else on fail.
410 */ 363 */
411 int crypto_engine_start(struct crypto_engine * 364 int crypto_engine_start(struct crypto_engine *engine)
412 { 365 {
413 unsigned long flags; 366 unsigned long flags;
414 367
415 spin_lock_irqsave(&engine->queue_lock, 368 spin_lock_irqsave(&engine->queue_lock, flags);
416 369
417 if (engine->running || engine->busy) { 370 if (engine->running || engine->busy) {
418 spin_unlock_irqrestore(&engine 371 spin_unlock_irqrestore(&engine->queue_lock, flags);
419 return -EBUSY; 372 return -EBUSY;
420 } 373 }
421 374
422 engine->running = true; 375 engine->running = true;
423 spin_unlock_irqrestore(&engine->queue_ 376 spin_unlock_irqrestore(&engine->queue_lock, flags);
424 377
425 kthread_queue_work(engine->kworker, &e 378 kthread_queue_work(engine->kworker, &engine->pump_requests);
426 379
427 return 0; 380 return 0;
428 } 381 }
429 EXPORT_SYMBOL_GPL(crypto_engine_start); 382 EXPORT_SYMBOL_GPL(crypto_engine_start);
430 383
431 /** 384 /**
432 * crypto_engine_stop - stop the hardware engi 385 * crypto_engine_stop - stop the hardware engine
433 * @engine: the hardware engine need to be sto 386 * @engine: the hardware engine need to be stopped
434 * 387 *
435 * Return 0 on success, else on fail. 388 * Return 0 on success, else on fail.
436 */ 389 */
437 int crypto_engine_stop(struct crypto_engine *e 390 int crypto_engine_stop(struct crypto_engine *engine)
438 { 391 {
439 unsigned long flags; 392 unsigned long flags;
440 unsigned int limit = 500; 393 unsigned int limit = 500;
441 int ret = 0; 394 int ret = 0;
442 395
443 spin_lock_irqsave(&engine->queue_lock, 396 spin_lock_irqsave(&engine->queue_lock, flags);
444 397
445 /* 398 /*
446 * If the engine queue is not empty or 399 * If the engine queue is not empty or the engine is on busy state,
447 * we need to wait for a while to pump 400 * we need to wait for a while to pump the requests of engine queue.
448 */ 401 */
449 while ((crypto_queue_len(&engine->queu 402 while ((crypto_queue_len(&engine->queue) || engine->busy) && limit--) {
450 spin_unlock_irqrestore(&engine 403 spin_unlock_irqrestore(&engine->queue_lock, flags);
451 msleep(20); 404 msleep(20);
452 spin_lock_irqsave(&engine->que 405 spin_lock_irqsave(&engine->queue_lock, flags);
453 } 406 }
454 407
455 if (crypto_queue_len(&engine->queue) | 408 if (crypto_queue_len(&engine->queue) || engine->busy)
456 ret = -EBUSY; 409 ret = -EBUSY;
457 else 410 else
458 engine->running = false; 411 engine->running = false;
459 412
460 spin_unlock_irqrestore(&engine->queue_ 413 spin_unlock_irqrestore(&engine->queue_lock, flags);
461 414
462 if (ret) 415 if (ret)
463 dev_warn(engine->dev, "could n 416 dev_warn(engine->dev, "could not stop engine\n");
464 417
465 return ret; 418 return ret;
466 } 419 }
467 EXPORT_SYMBOL_GPL(crypto_engine_stop); 420 EXPORT_SYMBOL_GPL(crypto_engine_stop);
468 421
469 /** 422 /**
470 * crypto_engine_alloc_init_and_set - allocate !! 423 * crypto_engine_alloc_init - allocate crypto hardware engine structure and
471 * and initialize it by setting the maximum nu !! 424 * initialize it.
472 * crypto-engine queue. <<
473 * @dev: the device attached with one hardware 425 * @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 426 * @rt: whether this queue is set to run as a realtime task
482 * @qlen: maximum size of the crypto-engine qu <<
483 * 427 *
484 * This must be called from context that can s 428 * This must be called from context that can sleep.
485 * Return: the crypto engine structure on succ 429 * Return: the crypto engine structure on success, else NULL.
486 */ 430 */
487 struct crypto_engine *crypto_engine_alloc_init !! 431 struct crypto_engine *crypto_engine_alloc_init(struct device *dev, bool rt)
488 <<
489 <<
490 <<
491 { 432 {
>> 433 struct sched_param param = { .sched_priority = MAX_RT_PRIO - 1 };
492 struct crypto_engine *engine; 434 struct crypto_engine *engine;
493 435
494 if (!dev) 436 if (!dev)
495 return NULL; 437 return NULL;
496 438
497 engine = devm_kzalloc(dev, sizeof(*eng 439 engine = devm_kzalloc(dev, sizeof(*engine), GFP_KERNEL);
498 if (!engine) 440 if (!engine)
499 return NULL; 441 return NULL;
500 442
501 engine->dev = dev; 443 engine->dev = dev;
502 engine->rt = rt; 444 engine->rt = rt;
503 engine->running = false; 445 engine->running = false;
504 engine->busy = false; 446 engine->busy = false;
505 engine->idling = false; 447 engine->idling = false;
506 engine->retry_support = retry_support; !! 448 engine->cur_req_prepared = false;
507 engine->priv_data = dev; 449 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-> 450 snprintf(engine->name, sizeof(engine->name),
515 "%s-engine", dev_name(dev)); 451 "%s-engine", dev_name(dev));
516 452
517 crypto_init_queue(&engine->queue, qlen !! 453 crypto_init_queue(&engine->queue, CRYPTO_ENGINE_MAX_QLEN);
518 spin_lock_init(&engine->queue_lock); 454 spin_lock_init(&engine->queue_lock);
519 455
520 engine->kworker = kthread_create_worke 456 engine->kworker = kthread_create_worker(0, "%s", engine->name);
521 if (IS_ERR(engine->kworker)) { 457 if (IS_ERR(engine->kworker)) {
522 dev_err(dev, "failed to create 458 dev_err(dev, "failed to create crypto request pump task\n");
523 return NULL; 459 return NULL;
524 } 460 }
525 kthread_init_work(&engine->pump_reques 461 kthread_init_work(&engine->pump_requests, crypto_pump_work);
526 462
527 if (engine->rt) { 463 if (engine->rt) {
528 dev_info(dev, "will run reques 464 dev_info(dev, "will run requests pump with realtime priority\n");
529 sched_set_fifo(engine->kworker !! 465 sched_setscheduler(engine->kworker->task, SCHED_FIFO, ¶m);
530 } 466 }
531 467
532 return engine; 468 return engine;
533 } 469 }
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); 470 EXPORT_SYMBOL_GPL(crypto_engine_alloc_init);
551 471
552 /** 472 /**
553 * crypto_engine_exit - free the resources of 473 * crypto_engine_exit - free the resources of hardware engine when exit
554 * @engine: the hardware engine need to be fre 474 * @engine: the hardware engine need to be freed
>> 475 *
>> 476 * Return 0 for success.
555 */ 477 */
556 void crypto_engine_exit(struct crypto_engine * !! 478 int crypto_engine_exit(struct crypto_engine *engine)
557 { 479 {
558 int ret; 480 int ret;
559 481
560 ret = crypto_engine_stop(engine); 482 ret = crypto_engine_stop(engine);
561 if (ret) 483 if (ret)
562 return; !! 484 return ret;
563 485
564 kthread_destroy_worker(engine->kworker 486 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 } <<
594 487
595 return 0; 488 return 0;
596 <<
597 err: <<
598 crypto_engine_unregister_aeads(algs, i <<
599 <<
600 return ret; <<
601 } <<
602 EXPORT_SYMBOL_GPL(crypto_engine_register_aeads <<
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 } 489 }
628 EXPORT_SYMBOL_GPL(crypto_engine_unregister_aha !! 490 EXPORT_SYMBOL_GPL(crypto_engine_exit);
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 <<
739 491
740 MODULE_LICENSE("GPL"); 492 MODULE_LICENSE("GPL");
741 MODULE_DESCRIPTION("Crypto hardware engine fra 493 MODULE_DESCRIPTION("Crypto hardware engine framework");
742 494
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