1 // SPDX-License-Identifier: GPL-2.0-or-later 1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* 2 /*
3 * Handle async block request by crypto hardwa 3 * Handle async block request by crypto hardware engine.
4 * 4 *
5 * Copyright (C) 2016 Linaro, Inc. 5 * Copyright (C) 2016 Linaro, Inc.
6 * 6 *
7 * Author: Baolin Wang <baolin.wang@linaro.org 7 * Author: Baolin Wang <baolin.wang@linaro.org>
8 */ 8 */
9 9
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> 10 #include <linux/err.h>
17 #include <linux/delay.h> 11 #include <linux/delay.h>
18 #include <linux/device.h> !! 12 #include <crypto/engine.h>
19 #include <linux/kernel.h> <<
20 #include <linux/module.h> <<
21 #include <uapi/linux/sched/types.h> 13 #include <uapi/linux/sched/types.h>
22 #include "internal.h" 14 #include "internal.h"
23 15
24 #define CRYPTO_ENGINE_MAX_QLEN 10 16 #define CRYPTO_ENGINE_MAX_QLEN 10
25 17
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 /** 18 /**
35 * crypto_finalize_request - finalize one requ 19 * crypto_finalize_request - finalize one request if the request is done
36 * @engine: the hardware engine 20 * @engine: the hardware engine
37 * @req: the request need to be finalized 21 * @req: the request need to be finalized
38 * @err: error number 22 * @err: error number
39 */ 23 */
40 static void crypto_finalize_request(struct cry 24 static void crypto_finalize_request(struct crypto_engine *engine,
41 struct cry !! 25 struct crypto_async_request *req, int err)
42 { 26 {
43 unsigned long flags; 27 unsigned long flags;
>> 28 bool finalize_cur_req = false;
>> 29 int ret;
>> 30 struct crypto_engine_ctx *enginectx;
44 31
45 /* !! 32 spin_lock_irqsave(&engine->queue_lock, flags);
46 * If hardware cannot enqueue more req !! 33 if (engine->cur_req == req)
47 * and retry mechanism is not supporte !! 34 finalize_cur_req = true;
48 * make sure we are completing the cur !! 35 spin_unlock_irqrestore(&engine->queue_lock, flags);
49 */ !! 36
50 if (!engine->retry_support) { !! 37 if (finalize_cur_req) {
51 spin_lock_irqsave(&engine->que !! 38 enginectx = crypto_tfm_ctx(req->tfm);
52 if (engine->cur_req == req) { !! 39 if (engine->cur_req_prepared &&
53 engine->cur_req = NULL !! 40 enginectx->op.unprepare_request) {
>> 41 ret = enginectx->op.unprepare_request(engine, req);
>> 42 if (ret)
>> 43 dev_err(engine->dev, "failed to unprepare request\n");
54 } 44 }
>> 45 spin_lock_irqsave(&engine->queue_lock, flags);
>> 46 engine->cur_req = NULL;
>> 47 engine->cur_req_prepared = false;
55 spin_unlock_irqrestore(&engine 48 spin_unlock_irqrestore(&engine->queue_lock, flags);
56 } 49 }
57 50
58 lockdep_assert_in_softirq(); !! 51 req->complete(req, err);
59 crypto_request_complete(req, err); <<
60 52
61 kthread_queue_work(engine->kworker, &e 53 kthread_queue_work(engine->kworker, &engine->pump_requests);
62 } 54 }
63 55
64 /** 56 /**
65 * crypto_pump_requests - dequeue one request 57 * crypto_pump_requests - dequeue one request from engine queue to process
66 * @engine: the hardware engine 58 * @engine: the hardware engine
67 * @in_kthread: true if we are in the context 59 * @in_kthread: true if we are in the context of the request pump thread
68 * 60 *
69 * This function checks if there is any reques 61 * This function checks if there is any request in the engine queue that
70 * needs processing and if so call out to the 62 * needs processing and if so call out to the driver to initialize hardware
71 * and handle each request. 63 * and handle each request.
72 */ 64 */
73 static void crypto_pump_requests(struct crypto 65 static void crypto_pump_requests(struct crypto_engine *engine,
74 bool in_kthre 66 bool in_kthread)
75 { 67 {
76 struct crypto_async_request *async_req 68 struct crypto_async_request *async_req, *backlog;
77 struct crypto_engine_alg *alg; <<
78 struct crypto_engine_op *op; <<
79 unsigned long flags; 69 unsigned long flags;
80 bool was_busy = false; 70 bool was_busy = false;
81 int ret; 71 int ret;
>> 72 struct crypto_engine_ctx *enginectx;
82 73
83 spin_lock_irqsave(&engine->queue_lock, 74 spin_lock_irqsave(&engine->queue_lock, flags);
84 75
85 /* Make sure we are not already runnin 76 /* Make sure we are not already running a request */
86 if (!engine->retry_support && engine-> !! 77 if (engine->cur_req)
87 goto out; 78 goto out;
88 79
89 /* If another context is idling then d 80 /* If another context is idling then defer */
90 if (engine->idling) { 81 if (engine->idling) {
91 kthread_queue_work(engine->kwo 82 kthread_queue_work(engine->kworker, &engine->pump_requests);
92 goto out; 83 goto out;
93 } 84 }
94 85
95 /* Check if the engine queue is idle * 86 /* Check if the engine queue is idle */
96 if (!crypto_queue_len(&engine->queue) 87 if (!crypto_queue_len(&engine->queue) || !engine->running) {
97 if (!engine->busy) 88 if (!engine->busy)
98 goto out; 89 goto out;
99 90
100 /* Only do teardown in the thr 91 /* Only do teardown in the thread */
101 if (!in_kthread) { 92 if (!in_kthread) {
102 kthread_queue_work(eng 93 kthread_queue_work(engine->kworker,
103 &en 94 &engine->pump_requests);
104 goto out; 95 goto out;
105 } 96 }
106 97
107 engine->busy = false; 98 engine->busy = false;
108 engine->idling = true; 99 engine->idling = true;
109 spin_unlock_irqrestore(&engine 100 spin_unlock_irqrestore(&engine->queue_lock, flags);
110 101
111 if (engine->unprepare_crypt_ha 102 if (engine->unprepare_crypt_hardware &&
112 engine->unprepare_crypt_ha 103 engine->unprepare_crypt_hardware(engine))
113 dev_err(engine->dev, " 104 dev_err(engine->dev, "failed to unprepare crypt hardware\n");
114 105
115 spin_lock_irqsave(&engine->que 106 spin_lock_irqsave(&engine->queue_lock, flags);
116 engine->idling = false; 107 engine->idling = false;
117 goto out; 108 goto out;
118 } 109 }
119 110
120 start_request: <<
121 /* Get the fist request from the engin 111 /* Get the fist request from the engine queue to handle */
122 backlog = crypto_get_backlog(&engine-> 112 backlog = crypto_get_backlog(&engine->queue);
123 async_req = crypto_dequeue_request(&en 113 async_req = crypto_dequeue_request(&engine->queue);
124 if (!async_req) 114 if (!async_req)
125 goto out; 115 goto out;
126 116
127 /* !! 117 engine->cur_req = async_req;
128 * If hardware doesn't support the ret !! 118 if (backlog)
129 * keep track of the request we are pr !! 119 backlog->complete(backlog, -EINPROGRESS);
130 * We'll need it on completion (crypto <<
131 */ <<
132 if (!engine->retry_support) <<
133 engine->cur_req = async_req; <<
134 120
135 if (engine->busy) 121 if (engine->busy)
136 was_busy = true; 122 was_busy = true;
137 else 123 else
138 engine->busy = true; 124 engine->busy = true;
139 125
140 spin_unlock_irqrestore(&engine->queue_ 126 spin_unlock_irqrestore(&engine->queue_lock, flags);
141 127
142 /* Until here we get the request need 128 /* Until here we get the request need to be encrypted successfully */
143 if (!was_busy && engine->prepare_crypt 129 if (!was_busy && engine->prepare_crypt_hardware) {
144 ret = engine->prepare_crypt_ha 130 ret = engine->prepare_crypt_hardware(engine);
145 if (ret) { 131 if (ret) {
146 dev_err(engine->dev, " 132 dev_err(engine->dev, "failed to prepare crypt hardware\n");
147 goto req_err_1; !! 133 goto req_err;
148 } 134 }
149 } 135 }
150 136
151 if (async_req->tfm->__crt_alg->cra_fla !! 137 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 <<
161 ret = op->do_one_request(engine, async <<
162 138
163 /* Request unsuccessfully executed by !! 139 if (enginectx->op.prepare_request) {
164 if (ret < 0) { !! 140 ret = enginectx->op.prepare_request(engine, async_req);
165 /* !! 141 if (ret) {
166 * If hardware queue is full ( !! 142 dev_err(engine->dev, "failed to prepare request: %d\n",
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); 143 ret);
175 goto req_err_1; !! 144 goto req_err;
176 } 145 }
177 spin_lock_irqsave(&engine->que !! 146 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 } 147 }
188 !! 148 if (!enginectx->op.do_one_request) {
189 goto retry; !! 149 dev_err(engine->dev, "failed to do request\n");
190 !! 150 ret = -EINVAL;
191 req_err_1: !! 151 goto req_err;
192 crypto_request_complete(async_req, ret !! 152 }
193 !! 153 ret = enginectx->op.do_one_request(engine, async_req);
194 retry: !! 154 if (ret) {
195 if (backlog) !! 155 dev_err(engine->dev, "Failed to do one request from queue: %d\n", ret);
196 crypto_request_complete(backlo !! 156 goto req_err;
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 }
203 return; 158 return;
204 159
>> 160 req_err:
>> 161 crypto_finalize_request(engine, async_req, ret);
>> 162 return;
>> 163
205 out: 164 out:
206 spin_unlock_irqrestore(&engine->queue_ 165 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 } 166 }
221 167
222 static void crypto_pump_work(struct kthread_wo 168 static void crypto_pump_work(struct kthread_work *work)
223 { 169 {
224 struct crypto_engine *engine = 170 struct crypto_engine *engine =
225 container_of(work, struct cryp 171 container_of(work, struct crypto_engine, pump_requests);
226 172
227 crypto_pump_requests(engine, true); 173 crypto_pump_requests(engine, true);
228 } 174 }
229 175
230 /** 176 /**
231 * crypto_transfer_request - transfer the new 177 * crypto_transfer_request - transfer the new request into the engine queue
232 * @engine: the hardware engine 178 * @engine: the hardware engine
233 * @req: the request need to be listed into th 179 * @req: the request need to be listed into the engine queue
234 * @need_pump: indicates whether queue the pum <<
235 */ 180 */
236 static int crypto_transfer_request(struct cryp 181 static int crypto_transfer_request(struct crypto_engine *engine,
237 struct cryp 182 struct crypto_async_request *req,
238 bool need_p 183 bool need_pump)
239 { 184 {
240 unsigned long flags; 185 unsigned long flags;
241 int ret; 186 int ret;
242 187
243 spin_lock_irqsave(&engine->queue_lock, 188 spin_lock_irqsave(&engine->queue_lock, flags);
244 189
245 if (!engine->running) { 190 if (!engine->running) {
246 spin_unlock_irqrestore(&engine 191 spin_unlock_irqrestore(&engine->queue_lock, flags);
247 return -ESHUTDOWN; 192 return -ESHUTDOWN;
248 } 193 }
249 194
250 ret = crypto_enqueue_request(&engine-> 195 ret = crypto_enqueue_request(&engine->queue, req);
251 196
252 if (!engine->busy && need_pump) 197 if (!engine->busy && need_pump)
253 kthread_queue_work(engine->kwo 198 kthread_queue_work(engine->kworker, &engine->pump_requests);
254 199
255 spin_unlock_irqrestore(&engine->queue_ 200 spin_unlock_irqrestore(&engine->queue_lock, flags);
256 return ret; 201 return ret;
257 } 202 }
258 203
259 /** 204 /**
260 * crypto_transfer_request_to_engine - transfe 205 * crypto_transfer_request_to_engine - transfer one request to list
261 * into the engine queue 206 * into the engine queue
262 * @engine: the hardware engine 207 * @engine: the hardware engine
263 * @req: the request need to be listed into th 208 * @req: the request need to be listed into the engine queue
264 */ 209 */
265 static int crypto_transfer_request_to_engine(s 210 static int crypto_transfer_request_to_engine(struct crypto_engine *engine,
266 s 211 struct crypto_async_request *req)
267 { 212 {
268 return crypto_transfer_request(engine, 213 return crypto_transfer_request(engine, req, true);
269 } 214 }
270 215
271 /** 216 /**
>> 217 * crypto_transfer_ablkcipher_request_to_engine - transfer one ablkcipher_request
>> 218 * to list into the engine queue
>> 219 * @engine: the hardware engine
>> 220 * @req: the request need to be listed into the engine queue
>> 221 * TODO: Remove this function when skcipher conversion is finished
>> 222 */
>> 223 int crypto_transfer_ablkcipher_request_to_engine(struct crypto_engine *engine,
>> 224 struct ablkcipher_request *req)
>> 225 {
>> 226 return crypto_transfer_request_to_engine(engine, &req->base);
>> 227 }
>> 228 EXPORT_SYMBOL_GPL(crypto_transfer_ablkcipher_request_to_engine);
>> 229
>> 230 /**
272 * crypto_transfer_aead_request_to_engine - tr 231 * crypto_transfer_aead_request_to_engine - transfer one aead_request
273 * to list into the engine queue 232 * to list into the engine queue
274 * @engine: the hardware engine 233 * @engine: the hardware engine
275 * @req: the request need to be listed into th 234 * @req: the request need to be listed into the engine queue
276 */ 235 */
277 int crypto_transfer_aead_request_to_engine(str 236 int crypto_transfer_aead_request_to_engine(struct crypto_engine *engine,
278 str 237 struct aead_request *req)
279 { 238 {
280 return crypto_transfer_request_to_engi 239 return crypto_transfer_request_to_engine(engine, &req->base);
281 } 240 }
282 EXPORT_SYMBOL_GPL(crypto_transfer_aead_request 241 EXPORT_SYMBOL_GPL(crypto_transfer_aead_request_to_engine);
283 242
284 /** 243 /**
285 * crypto_transfer_akcipher_request_to_engine 244 * crypto_transfer_akcipher_request_to_engine - transfer one akcipher_request
286 * to list into the engine queue 245 * to list into the engine queue
287 * @engine: the hardware engine 246 * @engine: the hardware engine
288 * @req: the request need to be listed into th 247 * @req: the request need to be listed into the engine queue
289 */ 248 */
290 int crypto_transfer_akcipher_request_to_engine 249 int crypto_transfer_akcipher_request_to_engine(struct crypto_engine *engine,
291 250 struct akcipher_request *req)
292 { 251 {
293 return crypto_transfer_request_to_engi 252 return crypto_transfer_request_to_engine(engine, &req->base);
294 } 253 }
295 EXPORT_SYMBOL_GPL(crypto_transfer_akcipher_req 254 EXPORT_SYMBOL_GPL(crypto_transfer_akcipher_request_to_engine);
296 255
297 /** 256 /**
298 * crypto_transfer_hash_request_to_engine - tr 257 * crypto_transfer_hash_request_to_engine - transfer one ahash_request
299 * to list into the engine queue 258 * to list into the engine queue
300 * @engine: the hardware engine 259 * @engine: the hardware engine
301 * @req: the request need to be listed into th 260 * @req: the request need to be listed into the engine queue
302 */ 261 */
303 int crypto_transfer_hash_request_to_engine(str 262 int crypto_transfer_hash_request_to_engine(struct crypto_engine *engine,
304 str 263 struct ahash_request *req)
305 { 264 {
306 return crypto_transfer_request_to_engi 265 return crypto_transfer_request_to_engine(engine, &req->base);
307 } 266 }
308 EXPORT_SYMBOL_GPL(crypto_transfer_hash_request 267 EXPORT_SYMBOL_GPL(crypto_transfer_hash_request_to_engine);
309 268
310 /** 269 /**
311 * crypto_transfer_kpp_request_to_engine - tra !! 270 * crypto_transfer_skcipher_request_to_engine - transfer one skcipher_request
312 * into the engine queue !! 271 * to list into the engine queue
313 * @engine: the hardware engine 272 * @engine: the hardware engine
314 * @req: the request need to be listed into th 273 * @req: the request need to be listed into the engine queue
315 */ 274 */
316 int crypto_transfer_kpp_request_to_engine(stru !! 275 int crypto_transfer_skcipher_request_to_engine(struct crypto_engine *engine,
317 stru !! 276 struct skcipher_request *req)
318 { 277 {
319 return crypto_transfer_request_to_engi 278 return crypto_transfer_request_to_engine(engine, &req->base);
320 } 279 }
321 EXPORT_SYMBOL_GPL(crypto_transfer_kpp_request_ !! 280 EXPORT_SYMBOL_GPL(crypto_transfer_skcipher_request_to_engine);
322 281
323 /** 282 /**
324 * crypto_transfer_skcipher_request_to_engine !! 283 * crypto_finalize_ablkcipher_request - finalize one ablkcipher_request if
325 * to list into the engine queue !! 284 * the request is done
326 * @engine: the hardware engine 285 * @engine: the hardware engine
327 * @req: the request need to be listed into th !! 286 * @req: the request need to be finalized
>> 287 * @err: error number
>> 288 * TODO: Remove this function when skcipher conversion is finished
328 */ 289 */
329 int crypto_transfer_skcipher_request_to_engine !! 290 void crypto_finalize_ablkcipher_request(struct crypto_engine *engine,
330 !! 291 struct ablkcipher_request *req, int err)
331 { 292 {
332 return crypto_transfer_request_to_engi !! 293 return crypto_finalize_request(engine, &req->base, err);
333 } 294 }
334 EXPORT_SYMBOL_GPL(crypto_transfer_skcipher_req !! 295 EXPORT_SYMBOL_GPL(crypto_finalize_ablkcipher_request);
335 296
336 /** 297 /**
337 * crypto_finalize_aead_request - finalize one 298 * crypto_finalize_aead_request - finalize one aead_request if
338 * the request is done 299 * the request is done
339 * @engine: the hardware engine 300 * @engine: the hardware engine
340 * @req: the request need to be finalized 301 * @req: the request need to be finalized
341 * @err: error number 302 * @err: error number
342 */ 303 */
343 void crypto_finalize_aead_request(struct crypt 304 void crypto_finalize_aead_request(struct crypto_engine *engine,
344 struct aead_ 305 struct aead_request *req, int err)
345 { 306 {
346 return crypto_finalize_request(engine, 307 return crypto_finalize_request(engine, &req->base, err);
347 } 308 }
348 EXPORT_SYMBOL_GPL(crypto_finalize_aead_request 309 EXPORT_SYMBOL_GPL(crypto_finalize_aead_request);
349 310
350 /** 311 /**
351 * crypto_finalize_akcipher_request - finalize 312 * crypto_finalize_akcipher_request - finalize one akcipher_request if
352 * the request is done 313 * the request is done
353 * @engine: the hardware engine 314 * @engine: the hardware engine
354 * @req: the request need to be finalized 315 * @req: the request need to be finalized
355 * @err: error number 316 * @err: error number
356 */ 317 */
357 void crypto_finalize_akcipher_request(struct c 318 void crypto_finalize_akcipher_request(struct crypto_engine *engine,
358 struct a 319 struct akcipher_request *req, int err)
359 { 320 {
360 return crypto_finalize_request(engine, 321 return crypto_finalize_request(engine, &req->base, err);
361 } 322 }
362 EXPORT_SYMBOL_GPL(crypto_finalize_akcipher_req 323 EXPORT_SYMBOL_GPL(crypto_finalize_akcipher_request);
363 324
364 /** 325 /**
365 * crypto_finalize_hash_request - finalize one 326 * crypto_finalize_hash_request - finalize one ahash_request if
366 * the request is done 327 * the request is done
367 * @engine: the hardware engine 328 * @engine: the hardware engine
368 * @req: the request need to be finalized 329 * @req: the request need to be finalized
369 * @err: error number 330 * @err: error number
370 */ 331 */
371 void crypto_finalize_hash_request(struct crypt 332 void crypto_finalize_hash_request(struct crypto_engine *engine,
372 struct ahash 333 struct ahash_request *req, int err)
373 { 334 {
374 return crypto_finalize_request(engine, 335 return crypto_finalize_request(engine, &req->base, err);
375 } 336 }
376 EXPORT_SYMBOL_GPL(crypto_finalize_hash_request 337 EXPORT_SYMBOL_GPL(crypto_finalize_hash_request);
377 338
378 /** 339 /**
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 340 * crypto_finalize_skcipher_request - finalize one skcipher_request if
393 * the request is done 341 * the request is done
394 * @engine: the hardware engine 342 * @engine: the hardware engine
395 * @req: the request need to be finalized 343 * @req: the request need to be finalized
396 * @err: error number 344 * @err: error number
397 */ 345 */
398 void crypto_finalize_skcipher_request(struct c 346 void crypto_finalize_skcipher_request(struct crypto_engine *engine,
399 struct s 347 struct skcipher_request *req, int err)
400 { 348 {
401 return crypto_finalize_request(engine, 349 return crypto_finalize_request(engine, &req->base, err);
402 } 350 }
403 EXPORT_SYMBOL_GPL(crypto_finalize_skcipher_req 351 EXPORT_SYMBOL_GPL(crypto_finalize_skcipher_request);
404 352
405 /** 353 /**
406 * crypto_engine_start - start the hardware en 354 * crypto_engine_start - start the hardware engine
407 * @engine: the hardware engine need to be sta 355 * @engine: the hardware engine need to be started
408 * 356 *
409 * Return 0 on success, else on fail. 357 * Return 0 on success, else on fail.
410 */ 358 */
411 int crypto_engine_start(struct crypto_engine * 359 int crypto_engine_start(struct crypto_engine *engine)
412 { 360 {
413 unsigned long flags; 361 unsigned long flags;
414 362
415 spin_lock_irqsave(&engine->queue_lock, 363 spin_lock_irqsave(&engine->queue_lock, flags);
416 364
417 if (engine->running || engine->busy) { 365 if (engine->running || engine->busy) {
418 spin_unlock_irqrestore(&engine 366 spin_unlock_irqrestore(&engine->queue_lock, flags);
419 return -EBUSY; 367 return -EBUSY;
420 } 368 }
421 369
422 engine->running = true; 370 engine->running = true;
423 spin_unlock_irqrestore(&engine->queue_ 371 spin_unlock_irqrestore(&engine->queue_lock, flags);
424 372
425 kthread_queue_work(engine->kworker, &e 373 kthread_queue_work(engine->kworker, &engine->pump_requests);
426 374
427 return 0; 375 return 0;
428 } 376 }
429 EXPORT_SYMBOL_GPL(crypto_engine_start); 377 EXPORT_SYMBOL_GPL(crypto_engine_start);
430 378
431 /** 379 /**
432 * crypto_engine_stop - stop the hardware engi 380 * crypto_engine_stop - stop the hardware engine
433 * @engine: the hardware engine need to be sto 381 * @engine: the hardware engine need to be stopped
434 * 382 *
435 * Return 0 on success, else on fail. 383 * Return 0 on success, else on fail.
436 */ 384 */
437 int crypto_engine_stop(struct crypto_engine *e 385 int crypto_engine_stop(struct crypto_engine *engine)
438 { 386 {
439 unsigned long flags; 387 unsigned long flags;
440 unsigned int limit = 500; 388 unsigned int limit = 500;
441 int ret = 0; 389 int ret = 0;
442 390
443 spin_lock_irqsave(&engine->queue_lock, 391 spin_lock_irqsave(&engine->queue_lock, flags);
444 392
445 /* 393 /*
446 * If the engine queue is not empty or 394 * If the engine queue is not empty or the engine is on busy state,
447 * we need to wait for a while to pump 395 * we need to wait for a while to pump the requests of engine queue.
448 */ 396 */
449 while ((crypto_queue_len(&engine->queu 397 while ((crypto_queue_len(&engine->queue) || engine->busy) && limit--) {
450 spin_unlock_irqrestore(&engine 398 spin_unlock_irqrestore(&engine->queue_lock, flags);
451 msleep(20); 399 msleep(20);
452 spin_lock_irqsave(&engine->que 400 spin_lock_irqsave(&engine->queue_lock, flags);
453 } 401 }
454 402
455 if (crypto_queue_len(&engine->queue) | 403 if (crypto_queue_len(&engine->queue) || engine->busy)
456 ret = -EBUSY; 404 ret = -EBUSY;
457 else 405 else
458 engine->running = false; 406 engine->running = false;
459 407
460 spin_unlock_irqrestore(&engine->queue_ 408 spin_unlock_irqrestore(&engine->queue_lock, flags);
461 409
462 if (ret) 410 if (ret)
463 dev_warn(engine->dev, "could n 411 dev_warn(engine->dev, "could not stop engine\n");
464 412
465 return ret; 413 return ret;
466 } 414 }
467 EXPORT_SYMBOL_GPL(crypto_engine_stop); 415 EXPORT_SYMBOL_GPL(crypto_engine_stop);
468 416
469 /** 417 /**
470 * crypto_engine_alloc_init_and_set - allocate !! 418 * crypto_engine_alloc_init - allocate crypto hardware engine structure and
471 * and initialize it by setting the maximum nu !! 419 * initialize it.
472 * crypto-engine queue. <<
473 * @dev: the device attached with one hardware 420 * @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 421 * @rt: whether this queue is set to run as a realtime task
482 * @qlen: maximum size of the crypto-engine qu <<
483 * 422 *
484 * This must be called from context that can s 423 * This must be called from context that can sleep.
485 * Return: the crypto engine structure on succ 424 * Return: the crypto engine structure on success, else NULL.
486 */ 425 */
487 struct crypto_engine *crypto_engine_alloc_init !! 426 struct crypto_engine *crypto_engine_alloc_init(struct device *dev, bool rt)
488 <<
489 <<
490 <<
491 { 427 {
>> 428 struct sched_param param = { .sched_priority = MAX_RT_PRIO - 1 };
492 struct crypto_engine *engine; 429 struct crypto_engine *engine;
493 430
494 if (!dev) 431 if (!dev)
495 return NULL; 432 return NULL;
496 433
497 engine = devm_kzalloc(dev, sizeof(*eng 434 engine = devm_kzalloc(dev, sizeof(*engine), GFP_KERNEL);
498 if (!engine) 435 if (!engine)
499 return NULL; 436 return NULL;
500 437
501 engine->dev = dev; 438 engine->dev = dev;
502 engine->rt = rt; 439 engine->rt = rt;
503 engine->running = false; 440 engine->running = false;
504 engine->busy = false; 441 engine->busy = false;
505 engine->idling = false; 442 engine->idling = false;
506 engine->retry_support = retry_support; !! 443 engine->cur_req_prepared = false;
507 engine->priv_data = dev; 444 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-> 445 snprintf(engine->name, sizeof(engine->name),
515 "%s-engine", dev_name(dev)); 446 "%s-engine", dev_name(dev));
516 447
517 crypto_init_queue(&engine->queue, qlen !! 448 crypto_init_queue(&engine->queue, CRYPTO_ENGINE_MAX_QLEN);
518 spin_lock_init(&engine->queue_lock); 449 spin_lock_init(&engine->queue_lock);
519 450
520 engine->kworker = kthread_create_worke 451 engine->kworker = kthread_create_worker(0, "%s", engine->name);
521 if (IS_ERR(engine->kworker)) { 452 if (IS_ERR(engine->kworker)) {
522 dev_err(dev, "failed to create 453 dev_err(dev, "failed to create crypto request pump task\n");
523 return NULL; 454 return NULL;
524 } 455 }
525 kthread_init_work(&engine->pump_reques 456 kthread_init_work(&engine->pump_requests, crypto_pump_work);
526 457
527 if (engine->rt) { 458 if (engine->rt) {
528 dev_info(dev, "will run reques 459 dev_info(dev, "will run requests pump with realtime priority\n");
529 sched_set_fifo(engine->kworker !! 460 sched_setscheduler(engine->kworker->task, SCHED_FIFO, ¶m);
530 } 461 }
531 462
532 return engine; 463 return engine;
533 } 464 }
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); 465 EXPORT_SYMBOL_GPL(crypto_engine_alloc_init);
551 466
552 /** 467 /**
553 * crypto_engine_exit - free the resources of 468 * crypto_engine_exit - free the resources of hardware engine when exit
554 * @engine: the hardware engine need to be fre 469 * @engine: the hardware engine need to be freed
>> 470 *
>> 471 * Return 0 for success.
555 */ 472 */
556 void crypto_engine_exit(struct crypto_engine * !! 473 int crypto_engine_exit(struct crypto_engine *engine)
557 { 474 {
558 int ret; 475 int ret;
559 476
560 ret = crypto_engine_stop(engine); 477 ret = crypto_engine_stop(engine);
561 if (ret) 478 if (ret)
562 return; !! 479 return ret;
563 480
564 kthread_destroy_worker(engine->kworker 481 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 <<
595 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 } <<
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 } <<
720 482
721 return 0; 483 return 0;
722 <<
723 err: <<
724 crypto_engine_unregister_skciphers(alg <<
725 <<
726 return ret; <<
727 } 484 }
728 EXPORT_SYMBOL_GPL(crypto_engine_register_skcip !! 485 EXPORT_SYMBOL_GPL(crypto_engine_exit);
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 <<
739 486
740 MODULE_LICENSE("GPL"); 487 MODULE_LICENSE("GPL");
741 MODULE_DESCRIPTION("Crypto hardware engine fra 488 MODULE_DESCRIPTION("Crypto hardware engine framework");
742 489
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.