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13802005 NR |
1 | /* |
2 | * Cryptographic API. | |
3 | * | |
4 | * Support for ATMEL DES/TDES HW acceleration. | |
5 | * | |
6 | * Copyright (c) 2012 Eukréa Electromatique - ATMEL | |
7 | * Author: Nicolas Royer <nicolas@eukrea.com> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as published | |
11 | * by the Free Software Foundation. | |
12 | * | |
13 | * Some ideas are from omap-aes.c drivers. | |
14 | */ | |
15 | ||
16 | ||
17 | #include <linux/kernel.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/slab.h> | |
20 | #include <linux/err.h> | |
21 | #include <linux/clk.h> | |
22 | #include <linux/io.h> | |
23 | #include <linux/hw_random.h> | |
24 | #include <linux/platform_device.h> | |
25 | ||
26 | #include <linux/device.h> | |
27 | #include <linux/module.h> | |
28 | #include <linux/init.h> | |
29 | #include <linux/errno.h> | |
30 | #include <linux/interrupt.h> | |
31 | #include <linux/kernel.h> | |
32 | #include <linux/clk.h> | |
33 | #include <linux/irq.h> | |
34 | #include <linux/io.h> | |
35 | #include <linux/platform_device.h> | |
36 | #include <linux/scatterlist.h> | |
37 | #include <linux/dma-mapping.h> | |
38 | #include <linux/delay.h> | |
39 | #include <linux/crypto.h> | |
40 | #include <linux/cryptohash.h> | |
41 | #include <crypto/scatterwalk.h> | |
42 | #include <crypto/algapi.h> | |
43 | #include <crypto/des.h> | |
44 | #include <crypto/hash.h> | |
45 | #include <crypto/internal/hash.h> | |
46 | #include "atmel-tdes-regs.h" | |
47 | ||
48 | /* TDES flags */ | |
49 | #define TDES_FLAGS_MODE_MASK 0x007f | |
50 | #define TDES_FLAGS_ENCRYPT BIT(0) | |
51 | #define TDES_FLAGS_CBC BIT(1) | |
52 | #define TDES_FLAGS_CFB BIT(2) | |
53 | #define TDES_FLAGS_CFB8 BIT(3) | |
54 | #define TDES_FLAGS_CFB16 BIT(4) | |
55 | #define TDES_FLAGS_CFB32 BIT(5) | |
56 | #define TDES_FLAGS_OFB BIT(6) | |
57 | ||
58 | #define TDES_FLAGS_INIT BIT(16) | |
59 | #define TDES_FLAGS_FAST BIT(17) | |
60 | #define TDES_FLAGS_BUSY BIT(18) | |
61 | ||
62 | #define ATMEL_TDES_QUEUE_LENGTH 1 | |
63 | ||
64 | #define CFB8_BLOCK_SIZE 1 | |
65 | #define CFB16_BLOCK_SIZE 2 | |
66 | #define CFB32_BLOCK_SIZE 4 | |
67 | #define CFB64_BLOCK_SIZE 8 | |
68 | ||
69 | ||
70 | struct atmel_tdes_dev; | |
71 | ||
72 | struct atmel_tdes_ctx { | |
73 | struct atmel_tdes_dev *dd; | |
74 | ||
75 | int keylen; | |
76 | u32 key[3*DES_KEY_SIZE / sizeof(u32)]; | |
77 | unsigned long flags; | |
78 | }; | |
79 | ||
80 | struct atmel_tdes_reqctx { | |
81 | unsigned long mode; | |
82 | }; | |
83 | ||
84 | struct atmel_tdes_dev { | |
85 | struct list_head list; | |
86 | unsigned long phys_base; | |
87 | void __iomem *io_base; | |
88 | ||
89 | struct atmel_tdes_ctx *ctx; | |
90 | struct device *dev; | |
91 | struct clk *iclk; | |
92 | int irq; | |
93 | ||
94 | unsigned long flags; | |
95 | int err; | |
96 | ||
97 | spinlock_t lock; | |
98 | struct crypto_queue queue; | |
99 | ||
100 | struct tasklet_struct done_task; | |
101 | struct tasklet_struct queue_task; | |
102 | ||
103 | struct ablkcipher_request *req; | |
104 | size_t total; | |
105 | ||
106 | struct scatterlist *in_sg; | |
107 | size_t in_offset; | |
108 | struct scatterlist *out_sg; | |
109 | size_t out_offset; | |
110 | ||
111 | size_t buflen; | |
112 | size_t dma_size; | |
113 | ||
114 | void *buf_in; | |
115 | int dma_in; | |
116 | dma_addr_t dma_addr_in; | |
117 | ||
118 | void *buf_out; | |
119 | int dma_out; | |
120 | dma_addr_t dma_addr_out; | |
121 | }; | |
122 | ||
123 | struct atmel_tdes_drv { | |
124 | struct list_head dev_list; | |
125 | spinlock_t lock; | |
126 | }; | |
127 | ||
128 | static struct atmel_tdes_drv atmel_tdes = { | |
129 | .dev_list = LIST_HEAD_INIT(atmel_tdes.dev_list), | |
130 | .lock = __SPIN_LOCK_UNLOCKED(atmel_tdes.lock), | |
131 | }; | |
132 | ||
133 | static int atmel_tdes_sg_copy(struct scatterlist **sg, size_t *offset, | |
134 | void *buf, size_t buflen, size_t total, int out) | |
135 | { | |
136 | unsigned int count, off = 0; | |
137 | ||
138 | while (buflen && total) { | |
139 | count = min((*sg)->length - *offset, total); | |
140 | count = min(count, buflen); | |
141 | ||
142 | if (!count) | |
143 | return off; | |
144 | ||
145 | scatterwalk_map_and_copy(buf + off, *sg, *offset, count, out); | |
146 | ||
147 | off += count; | |
148 | buflen -= count; | |
149 | *offset += count; | |
150 | total -= count; | |
151 | ||
152 | if (*offset == (*sg)->length) { | |
153 | *sg = sg_next(*sg); | |
154 | if (*sg) | |
155 | *offset = 0; | |
156 | else | |
157 | total = 0; | |
158 | } | |
159 | } | |
160 | ||
161 | return off; | |
162 | } | |
163 | ||
164 | static inline u32 atmel_tdes_read(struct atmel_tdes_dev *dd, u32 offset) | |
165 | { | |
166 | return readl_relaxed(dd->io_base + offset); | |
167 | } | |
168 | ||
169 | static inline void atmel_tdes_write(struct atmel_tdes_dev *dd, | |
170 | u32 offset, u32 value) | |
171 | { | |
172 | writel_relaxed(value, dd->io_base + offset); | |
173 | } | |
174 | ||
175 | static void atmel_tdes_write_n(struct atmel_tdes_dev *dd, u32 offset, | |
176 | u32 *value, int count) | |
177 | { | |
178 | for (; count--; value++, offset += 4) | |
179 | atmel_tdes_write(dd, offset, *value); | |
180 | } | |
181 | ||
182 | static struct atmel_tdes_dev *atmel_tdes_find_dev(struct atmel_tdes_ctx *ctx) | |
183 | { | |
184 | struct atmel_tdes_dev *tdes_dd = NULL; | |
185 | struct atmel_tdes_dev *tmp; | |
186 | ||
187 | spin_lock_bh(&atmel_tdes.lock); | |
188 | if (!ctx->dd) { | |
189 | list_for_each_entry(tmp, &atmel_tdes.dev_list, list) { | |
190 | tdes_dd = tmp; | |
191 | break; | |
192 | } | |
193 | ctx->dd = tdes_dd; | |
194 | } else { | |
195 | tdes_dd = ctx->dd; | |
196 | } | |
197 | spin_unlock_bh(&atmel_tdes.lock); | |
198 | ||
199 | return tdes_dd; | |
200 | } | |
201 | ||
202 | static int atmel_tdes_hw_init(struct atmel_tdes_dev *dd) | |
203 | { | |
204 | clk_prepare_enable(dd->iclk); | |
205 | ||
206 | if (!(dd->flags & TDES_FLAGS_INIT)) { | |
207 | atmel_tdes_write(dd, TDES_CR, TDES_CR_SWRST); | |
208 | dd->flags |= TDES_FLAGS_INIT; | |
209 | dd->err = 0; | |
210 | } | |
211 | ||
212 | return 0; | |
213 | } | |
214 | ||
215 | static int atmel_tdes_write_ctrl(struct atmel_tdes_dev *dd) | |
216 | { | |
217 | int err; | |
218 | u32 valcr = 0, valmr = TDES_MR_SMOD_PDC; | |
219 | ||
220 | err = atmel_tdes_hw_init(dd); | |
221 | ||
222 | if (err) | |
223 | return err; | |
224 | ||
225 | atmel_tdes_write(dd, TDES_PTCR, TDES_PTCR_TXTDIS|TDES_PTCR_RXTDIS); | |
226 | ||
227 | /* MR register must be set before IV registers */ | |
228 | if (dd->ctx->keylen > (DES_KEY_SIZE << 1)) { | |
229 | valmr |= TDES_MR_KEYMOD_3KEY; | |
230 | valmr |= TDES_MR_TDESMOD_TDES; | |
231 | } else if (dd->ctx->keylen > DES_KEY_SIZE) { | |
232 | valmr |= TDES_MR_KEYMOD_2KEY; | |
233 | valmr |= TDES_MR_TDESMOD_TDES; | |
234 | } else { | |
235 | valmr |= TDES_MR_TDESMOD_DES; | |
236 | } | |
237 | ||
238 | if (dd->flags & TDES_FLAGS_CBC) { | |
239 | valmr |= TDES_MR_OPMOD_CBC; | |
240 | } else if (dd->flags & TDES_FLAGS_CFB) { | |
241 | valmr |= TDES_MR_OPMOD_CFB; | |
242 | ||
243 | if (dd->flags & TDES_FLAGS_CFB8) | |
244 | valmr |= TDES_MR_CFBS_8b; | |
245 | else if (dd->flags & TDES_FLAGS_CFB16) | |
246 | valmr |= TDES_MR_CFBS_16b; | |
247 | else if (dd->flags & TDES_FLAGS_CFB32) | |
248 | valmr |= TDES_MR_CFBS_32b; | |
249 | } else if (dd->flags & TDES_FLAGS_OFB) { | |
250 | valmr |= TDES_MR_OPMOD_OFB; | |
251 | } | |
252 | ||
253 | if ((dd->flags & TDES_FLAGS_ENCRYPT) || (dd->flags & TDES_FLAGS_OFB)) | |
254 | valmr |= TDES_MR_CYPHER_ENC; | |
255 | ||
256 | atmel_tdes_write(dd, TDES_CR, valcr); | |
257 | atmel_tdes_write(dd, TDES_MR, valmr); | |
258 | ||
259 | atmel_tdes_write_n(dd, TDES_KEY1W1R, dd->ctx->key, | |
260 | dd->ctx->keylen >> 2); | |
261 | ||
262 | if (((dd->flags & TDES_FLAGS_CBC) || (dd->flags & TDES_FLAGS_CFB) || | |
263 | (dd->flags & TDES_FLAGS_OFB)) && dd->req->info) { | |
264 | atmel_tdes_write_n(dd, TDES_IV1R, dd->req->info, 2); | |
265 | } | |
266 | ||
267 | return 0; | |
268 | } | |
269 | ||
270 | static int atmel_tdes_crypt_dma_stop(struct atmel_tdes_dev *dd) | |
271 | { | |
272 | int err = 0; | |
273 | size_t count; | |
274 | ||
275 | atmel_tdes_write(dd, TDES_PTCR, TDES_PTCR_TXTDIS|TDES_PTCR_RXTDIS); | |
276 | ||
277 | if (dd->flags & TDES_FLAGS_FAST) { | |
278 | dma_unmap_sg(dd->dev, dd->out_sg, 1, DMA_FROM_DEVICE); | |
279 | dma_unmap_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE); | |
280 | } else { | |
281 | dma_sync_single_for_device(dd->dev, dd->dma_addr_out, | |
282 | dd->dma_size, DMA_FROM_DEVICE); | |
283 | ||
284 | /* copy data */ | |
285 | count = atmel_tdes_sg_copy(&dd->out_sg, &dd->out_offset, | |
286 | dd->buf_out, dd->buflen, dd->dma_size, 1); | |
287 | if (count != dd->dma_size) { | |
288 | err = -EINVAL; | |
289 | pr_err("not all data converted: %u\n", count); | |
290 | } | |
291 | } | |
292 | ||
293 | return err; | |
294 | } | |
295 | ||
296 | static int atmel_tdes_dma_init(struct atmel_tdes_dev *dd) | |
297 | { | |
298 | int err = -ENOMEM; | |
299 | ||
300 | dd->buf_in = (void *)__get_free_pages(GFP_KERNEL, 0); | |
301 | dd->buf_out = (void *)__get_free_pages(GFP_KERNEL, 0); | |
302 | dd->buflen = PAGE_SIZE; | |
303 | dd->buflen &= ~(DES_BLOCK_SIZE - 1); | |
304 | ||
305 | if (!dd->buf_in || !dd->buf_out) { | |
306 | dev_err(dd->dev, "unable to alloc pages.\n"); | |
307 | goto err_alloc; | |
308 | } | |
309 | ||
310 | /* MAP here */ | |
311 | dd->dma_addr_in = dma_map_single(dd->dev, dd->buf_in, | |
312 | dd->buflen, DMA_TO_DEVICE); | |
313 | if (dma_mapping_error(dd->dev, dd->dma_addr_in)) { | |
314 | dev_err(dd->dev, "dma %d bytes error\n", dd->buflen); | |
315 | err = -EINVAL; | |
316 | goto err_map_in; | |
317 | } | |
318 | ||
319 | dd->dma_addr_out = dma_map_single(dd->dev, dd->buf_out, | |
320 | dd->buflen, DMA_FROM_DEVICE); | |
321 | if (dma_mapping_error(dd->dev, dd->dma_addr_out)) { | |
322 | dev_err(dd->dev, "dma %d bytes error\n", dd->buflen); | |
323 | err = -EINVAL; | |
324 | goto err_map_out; | |
325 | } | |
326 | ||
327 | return 0; | |
328 | ||
329 | err_map_out: | |
330 | dma_unmap_single(dd->dev, dd->dma_addr_in, dd->buflen, | |
331 | DMA_TO_DEVICE); | |
332 | err_map_in: | |
333 | free_page((unsigned long)dd->buf_out); | |
334 | free_page((unsigned long)dd->buf_in); | |
335 | err_alloc: | |
336 | if (err) | |
337 | pr_err("error: %d\n", err); | |
338 | return err; | |
339 | } | |
340 | ||
341 | static void atmel_tdes_dma_cleanup(struct atmel_tdes_dev *dd) | |
342 | { | |
343 | dma_unmap_single(dd->dev, dd->dma_addr_out, dd->buflen, | |
344 | DMA_FROM_DEVICE); | |
345 | dma_unmap_single(dd->dev, dd->dma_addr_in, dd->buflen, | |
346 | DMA_TO_DEVICE); | |
347 | free_page((unsigned long)dd->buf_out); | |
348 | free_page((unsigned long)dd->buf_in); | |
349 | } | |
350 | ||
351 | static int atmel_tdes_crypt_dma(struct crypto_tfm *tfm, dma_addr_t dma_addr_in, | |
352 | dma_addr_t dma_addr_out, int length) | |
353 | { | |
354 | struct atmel_tdes_ctx *ctx = crypto_tfm_ctx(tfm); | |
355 | struct atmel_tdes_dev *dd = ctx->dd; | |
356 | int len32; | |
357 | ||
358 | dd->dma_size = length; | |
359 | ||
360 | if (!(dd->flags & TDES_FLAGS_FAST)) { | |
361 | dma_sync_single_for_device(dd->dev, dma_addr_in, length, | |
362 | DMA_TO_DEVICE); | |
363 | } | |
364 | ||
365 | if ((dd->flags & TDES_FLAGS_CFB) && (dd->flags & TDES_FLAGS_CFB8)) | |
366 | len32 = DIV_ROUND_UP(length, sizeof(u8)); | |
367 | else if ((dd->flags & TDES_FLAGS_CFB) && (dd->flags & TDES_FLAGS_CFB16)) | |
368 | len32 = DIV_ROUND_UP(length, sizeof(u16)); | |
369 | else | |
370 | len32 = DIV_ROUND_UP(length, sizeof(u32)); | |
371 | ||
372 | atmel_tdes_write(dd, TDES_PTCR, TDES_PTCR_TXTDIS|TDES_PTCR_RXTDIS); | |
373 | atmel_tdes_write(dd, TDES_TPR, dma_addr_in); | |
374 | atmel_tdes_write(dd, TDES_TCR, len32); | |
375 | atmel_tdes_write(dd, TDES_RPR, dma_addr_out); | |
376 | atmel_tdes_write(dd, TDES_RCR, len32); | |
377 | ||
378 | /* Enable Interrupt */ | |
379 | atmel_tdes_write(dd, TDES_IER, TDES_INT_ENDRX); | |
380 | ||
381 | /* Start DMA transfer */ | |
382 | atmel_tdes_write(dd, TDES_PTCR, TDES_PTCR_TXTEN | TDES_PTCR_RXTEN); | |
383 | ||
384 | return 0; | |
385 | } | |
386 | ||
387 | static int atmel_tdes_crypt_dma_start(struct atmel_tdes_dev *dd) | |
388 | { | |
389 | struct crypto_tfm *tfm = crypto_ablkcipher_tfm( | |
390 | crypto_ablkcipher_reqtfm(dd->req)); | |
391 | int err, fast = 0, in, out; | |
392 | size_t count; | |
393 | dma_addr_t addr_in, addr_out; | |
394 | ||
395 | if (sg_is_last(dd->in_sg) && sg_is_last(dd->out_sg)) { | |
396 | /* check for alignment */ | |
397 | in = IS_ALIGNED((u32)dd->in_sg->offset, sizeof(u32)); | |
398 | out = IS_ALIGNED((u32)dd->out_sg->offset, sizeof(u32)); | |
399 | ||
400 | fast = in && out; | |
401 | } | |
402 | ||
403 | if (fast) { | |
404 | count = min(dd->total, sg_dma_len(dd->in_sg)); | |
405 | count = min(count, sg_dma_len(dd->out_sg)); | |
406 | ||
407 | if (count != dd->total) { | |
408 | pr_err("request length != buffer length\n"); | |
409 | return -EINVAL; | |
410 | } | |
411 | ||
412 | err = dma_map_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE); | |
413 | if (!err) { | |
414 | dev_err(dd->dev, "dma_map_sg() error\n"); | |
415 | return -EINVAL; | |
416 | } | |
417 | ||
418 | err = dma_map_sg(dd->dev, dd->out_sg, 1, | |
419 | DMA_FROM_DEVICE); | |
420 | if (!err) { | |
421 | dev_err(dd->dev, "dma_map_sg() error\n"); | |
422 | dma_unmap_sg(dd->dev, dd->in_sg, 1, | |
423 | DMA_TO_DEVICE); | |
424 | return -EINVAL; | |
425 | } | |
426 | ||
427 | addr_in = sg_dma_address(dd->in_sg); | |
428 | addr_out = sg_dma_address(dd->out_sg); | |
429 | ||
430 | dd->flags |= TDES_FLAGS_FAST; | |
431 | ||
432 | } else { | |
433 | /* use cache buffers */ | |
434 | count = atmel_tdes_sg_copy(&dd->in_sg, &dd->in_offset, | |
435 | dd->buf_in, dd->buflen, dd->total, 0); | |
436 | ||
437 | addr_in = dd->dma_addr_in; | |
438 | addr_out = dd->dma_addr_out; | |
439 | ||
440 | dd->flags &= ~TDES_FLAGS_FAST; | |
441 | ||
442 | } | |
443 | ||
444 | dd->total -= count; | |
445 | ||
446 | err = atmel_tdes_crypt_dma(tfm, addr_in, addr_out, count); | |
447 | if (err) { | |
448 | dma_unmap_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE); | |
449 | dma_unmap_sg(dd->dev, dd->out_sg, 1, DMA_TO_DEVICE); | |
450 | } | |
451 | ||
452 | return err; | |
453 | } | |
454 | ||
455 | ||
456 | static void atmel_tdes_finish_req(struct atmel_tdes_dev *dd, int err) | |
457 | { | |
458 | struct ablkcipher_request *req = dd->req; | |
459 | ||
460 | clk_disable_unprepare(dd->iclk); | |
461 | ||
462 | dd->flags &= ~TDES_FLAGS_BUSY; | |
463 | ||
464 | req->base.complete(&req->base, err); | |
465 | } | |
466 | ||
467 | static int atmel_tdes_handle_queue(struct atmel_tdes_dev *dd, | |
468 | struct ablkcipher_request *req) | |
469 | { | |
470 | struct crypto_async_request *async_req, *backlog; | |
471 | struct atmel_tdes_ctx *ctx; | |
472 | struct atmel_tdes_reqctx *rctx; | |
473 | unsigned long flags; | |
474 | int err, ret = 0; | |
475 | ||
476 | spin_lock_irqsave(&dd->lock, flags); | |
477 | if (req) | |
478 | ret = ablkcipher_enqueue_request(&dd->queue, req); | |
479 | if (dd->flags & TDES_FLAGS_BUSY) { | |
480 | spin_unlock_irqrestore(&dd->lock, flags); | |
481 | return ret; | |
482 | } | |
483 | backlog = crypto_get_backlog(&dd->queue); | |
484 | async_req = crypto_dequeue_request(&dd->queue); | |
485 | if (async_req) | |
486 | dd->flags |= TDES_FLAGS_BUSY; | |
487 | spin_unlock_irqrestore(&dd->lock, flags); | |
488 | ||
489 | if (!async_req) | |
490 | return ret; | |
491 | ||
492 | if (backlog) | |
493 | backlog->complete(backlog, -EINPROGRESS); | |
494 | ||
495 | req = ablkcipher_request_cast(async_req); | |
496 | ||
497 | /* assign new request to device */ | |
498 | dd->req = req; | |
499 | dd->total = req->nbytes; | |
500 | dd->in_offset = 0; | |
501 | dd->in_sg = req->src; | |
502 | dd->out_offset = 0; | |
503 | dd->out_sg = req->dst; | |
504 | ||
505 | rctx = ablkcipher_request_ctx(req); | |
506 | ctx = crypto_ablkcipher_ctx(crypto_ablkcipher_reqtfm(req)); | |
507 | rctx->mode &= TDES_FLAGS_MODE_MASK; | |
508 | dd->flags = (dd->flags & ~TDES_FLAGS_MODE_MASK) | rctx->mode; | |
509 | dd->ctx = ctx; | |
510 | ctx->dd = dd; | |
511 | ||
512 | err = atmel_tdes_write_ctrl(dd); | |
513 | if (!err) | |
514 | err = atmel_tdes_crypt_dma_start(dd); | |
515 | if (err) { | |
516 | /* des_task will not finish it, so do it here */ | |
517 | atmel_tdes_finish_req(dd, err); | |
518 | tasklet_schedule(&dd->queue_task); | |
519 | } | |
520 | ||
521 | return ret; | |
522 | } | |
523 | ||
524 | ||
525 | static int atmel_tdes_crypt(struct ablkcipher_request *req, unsigned long mode) | |
526 | { | |
527 | struct atmel_tdes_ctx *ctx = crypto_ablkcipher_ctx( | |
528 | crypto_ablkcipher_reqtfm(req)); | |
529 | struct atmel_tdes_reqctx *rctx = ablkcipher_request_ctx(req); | |
530 | struct atmel_tdes_dev *dd; | |
531 | ||
532 | if (mode & TDES_FLAGS_CFB8) { | |
533 | if (!IS_ALIGNED(req->nbytes, CFB8_BLOCK_SIZE)) { | |
534 | pr_err("request size is not exact amount of CFB8 blocks\n"); | |
535 | return -EINVAL; | |
536 | } | |
537 | } else if (mode & TDES_FLAGS_CFB16) { | |
538 | if (!IS_ALIGNED(req->nbytes, CFB16_BLOCK_SIZE)) { | |
539 | pr_err("request size is not exact amount of CFB16 blocks\n"); | |
540 | return -EINVAL; | |
541 | } | |
542 | } else if (mode & TDES_FLAGS_CFB32) { | |
543 | if (!IS_ALIGNED(req->nbytes, CFB32_BLOCK_SIZE)) { | |
544 | pr_err("request size is not exact amount of CFB32 blocks\n"); | |
545 | return -EINVAL; | |
546 | } | |
547 | } else if (!IS_ALIGNED(req->nbytes, DES_BLOCK_SIZE)) { | |
548 | pr_err("request size is not exact amount of DES blocks\n"); | |
549 | return -EINVAL; | |
550 | } | |
551 | ||
552 | dd = atmel_tdes_find_dev(ctx); | |
553 | if (!dd) | |
554 | return -ENODEV; | |
555 | ||
556 | rctx->mode = mode; | |
557 | ||
558 | return atmel_tdes_handle_queue(dd, req); | |
559 | } | |
560 | ||
561 | static int atmel_des_setkey(struct crypto_ablkcipher *tfm, const u8 *key, | |
562 | unsigned int keylen) | |
563 | { | |
564 | u32 tmp[DES_EXPKEY_WORDS]; | |
565 | int err; | |
566 | struct crypto_tfm *ctfm = crypto_ablkcipher_tfm(tfm); | |
567 | ||
568 | struct atmel_tdes_ctx *ctx = crypto_ablkcipher_ctx(tfm); | |
569 | ||
570 | if (keylen != DES_KEY_SIZE) { | |
571 | crypto_ablkcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN); | |
572 | return -EINVAL; | |
573 | } | |
574 | ||
575 | err = des_ekey(tmp, key); | |
576 | if (err == 0 && (ctfm->crt_flags & CRYPTO_TFM_REQ_WEAK_KEY)) { | |
577 | ctfm->crt_flags |= CRYPTO_TFM_RES_WEAK_KEY; | |
578 | return -EINVAL; | |
579 | } | |
580 | ||
581 | memcpy(ctx->key, key, keylen); | |
582 | ctx->keylen = keylen; | |
583 | ||
584 | return 0; | |
585 | } | |
586 | ||
587 | static int atmel_tdes_setkey(struct crypto_ablkcipher *tfm, const u8 *key, | |
588 | unsigned int keylen) | |
589 | { | |
590 | struct atmel_tdes_ctx *ctx = crypto_ablkcipher_ctx(tfm); | |
591 | const char *alg_name; | |
592 | ||
593 | alg_name = crypto_tfm_alg_name(crypto_ablkcipher_tfm(tfm)); | |
594 | ||
595 | /* | |
596 | * HW bug in cfb 3-keys mode. | |
597 | */ | |
598 | if (strstr(alg_name, "cfb") && (keylen != 2*DES_KEY_SIZE)) { | |
599 | crypto_ablkcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN); | |
600 | return -EINVAL; | |
601 | } else if ((keylen != 2*DES_KEY_SIZE) && (keylen != 3*DES_KEY_SIZE)) { | |
602 | crypto_ablkcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN); | |
603 | return -EINVAL; | |
604 | } | |
605 | ||
606 | memcpy(ctx->key, key, keylen); | |
607 | ctx->keylen = keylen; | |
608 | ||
609 | return 0; | |
610 | } | |
611 | ||
612 | static int atmel_tdes_ecb_encrypt(struct ablkcipher_request *req) | |
613 | { | |
614 | return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT); | |
615 | } | |
616 | ||
617 | static int atmel_tdes_ecb_decrypt(struct ablkcipher_request *req) | |
618 | { | |
619 | return atmel_tdes_crypt(req, 0); | |
620 | } | |
621 | ||
622 | static int atmel_tdes_cbc_encrypt(struct ablkcipher_request *req) | |
623 | { | |
624 | return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT | TDES_FLAGS_CBC); | |
625 | } | |
626 | ||
627 | static int atmel_tdes_cbc_decrypt(struct ablkcipher_request *req) | |
628 | { | |
629 | return atmel_tdes_crypt(req, TDES_FLAGS_CBC); | |
630 | } | |
631 | static int atmel_tdes_cfb_encrypt(struct ablkcipher_request *req) | |
632 | { | |
633 | return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT | TDES_FLAGS_CFB); | |
634 | } | |
635 | ||
636 | static int atmel_tdes_cfb_decrypt(struct ablkcipher_request *req) | |
637 | { | |
638 | return atmel_tdes_crypt(req, TDES_FLAGS_CFB); | |
639 | } | |
640 | ||
641 | static int atmel_tdes_cfb8_encrypt(struct ablkcipher_request *req) | |
642 | { | |
643 | return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT | TDES_FLAGS_CFB | | |
644 | TDES_FLAGS_CFB8); | |
645 | } | |
646 | ||
647 | static int atmel_tdes_cfb8_decrypt(struct ablkcipher_request *req) | |
648 | { | |
649 | return atmel_tdes_crypt(req, TDES_FLAGS_CFB | TDES_FLAGS_CFB8); | |
650 | } | |
651 | ||
652 | static int atmel_tdes_cfb16_encrypt(struct ablkcipher_request *req) | |
653 | { | |
654 | return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT | TDES_FLAGS_CFB | | |
655 | TDES_FLAGS_CFB16); | |
656 | } | |
657 | ||
658 | static int atmel_tdes_cfb16_decrypt(struct ablkcipher_request *req) | |
659 | { | |
660 | return atmel_tdes_crypt(req, TDES_FLAGS_CFB | TDES_FLAGS_CFB16); | |
661 | } | |
662 | ||
663 | static int atmel_tdes_cfb32_encrypt(struct ablkcipher_request *req) | |
664 | { | |
665 | return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT | TDES_FLAGS_CFB | | |
666 | TDES_FLAGS_CFB32); | |
667 | } | |
668 | ||
669 | static int atmel_tdes_cfb32_decrypt(struct ablkcipher_request *req) | |
670 | { | |
671 | return atmel_tdes_crypt(req, TDES_FLAGS_CFB | TDES_FLAGS_CFB32); | |
672 | } | |
673 | ||
674 | static int atmel_tdes_ofb_encrypt(struct ablkcipher_request *req) | |
675 | { | |
676 | return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT | TDES_FLAGS_OFB); | |
677 | } | |
678 | ||
679 | static int atmel_tdes_ofb_decrypt(struct ablkcipher_request *req) | |
680 | { | |
681 | return atmel_tdes_crypt(req, TDES_FLAGS_OFB); | |
682 | } | |
683 | ||
684 | static int atmel_tdes_cra_init(struct crypto_tfm *tfm) | |
685 | { | |
686 | tfm->crt_ablkcipher.reqsize = sizeof(struct atmel_tdes_reqctx); | |
687 | ||
688 | return 0; | |
689 | } | |
690 | ||
691 | static void atmel_tdes_cra_exit(struct crypto_tfm *tfm) | |
692 | { | |
693 | } | |
694 | ||
695 | static struct crypto_alg tdes_algs[] = { | |
696 | { | |
697 | .cra_name = "ecb(des)", | |
698 | .cra_driver_name = "atmel-ecb-des", | |
699 | .cra_priority = 100, | |
700 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
701 | .cra_blocksize = DES_BLOCK_SIZE, | |
702 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
703 | .cra_alignmask = 0, | |
704 | .cra_type = &crypto_ablkcipher_type, | |
705 | .cra_module = THIS_MODULE, | |
706 | .cra_init = atmel_tdes_cra_init, | |
707 | .cra_exit = atmel_tdes_cra_exit, | |
708 | .cra_u.ablkcipher = { | |
709 | .min_keysize = DES_KEY_SIZE, | |
710 | .max_keysize = DES_KEY_SIZE, | |
711 | .setkey = atmel_des_setkey, | |
712 | .encrypt = atmel_tdes_ecb_encrypt, | |
713 | .decrypt = atmel_tdes_ecb_decrypt, | |
714 | } | |
715 | }, | |
716 | { | |
717 | .cra_name = "cbc(des)", | |
718 | .cra_driver_name = "atmel-cbc-des", | |
719 | .cra_priority = 100, | |
720 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
721 | .cra_blocksize = DES_BLOCK_SIZE, | |
722 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
723 | .cra_alignmask = 0, | |
724 | .cra_type = &crypto_ablkcipher_type, | |
725 | .cra_module = THIS_MODULE, | |
726 | .cra_init = atmel_tdes_cra_init, | |
727 | .cra_exit = atmel_tdes_cra_exit, | |
728 | .cra_u.ablkcipher = { | |
729 | .min_keysize = DES_KEY_SIZE, | |
730 | .max_keysize = DES_KEY_SIZE, | |
731 | .ivsize = DES_BLOCK_SIZE, | |
732 | .setkey = atmel_des_setkey, | |
733 | .encrypt = atmel_tdes_cbc_encrypt, | |
734 | .decrypt = atmel_tdes_cbc_decrypt, | |
735 | } | |
736 | }, | |
737 | { | |
738 | .cra_name = "cfb(des)", | |
739 | .cra_driver_name = "atmel-cfb-des", | |
740 | .cra_priority = 100, | |
741 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
742 | .cra_blocksize = DES_BLOCK_SIZE, | |
743 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
744 | .cra_alignmask = 0, | |
745 | .cra_type = &crypto_ablkcipher_type, | |
746 | .cra_module = THIS_MODULE, | |
747 | .cra_init = atmel_tdes_cra_init, | |
748 | .cra_exit = atmel_tdes_cra_exit, | |
749 | .cra_u.ablkcipher = { | |
750 | .min_keysize = DES_KEY_SIZE, | |
751 | .max_keysize = DES_KEY_SIZE, | |
752 | .ivsize = DES_BLOCK_SIZE, | |
753 | .setkey = atmel_des_setkey, | |
754 | .encrypt = atmel_tdes_cfb_encrypt, | |
755 | .decrypt = atmel_tdes_cfb_decrypt, | |
756 | } | |
757 | }, | |
758 | { | |
759 | .cra_name = "cfb8(des)", | |
760 | .cra_driver_name = "atmel-cfb8-des", | |
761 | .cra_priority = 100, | |
762 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
763 | .cra_blocksize = CFB8_BLOCK_SIZE, | |
764 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
765 | .cra_alignmask = 0, | |
766 | .cra_type = &crypto_ablkcipher_type, | |
767 | .cra_module = THIS_MODULE, | |
768 | .cra_init = atmel_tdes_cra_init, | |
769 | .cra_exit = atmel_tdes_cra_exit, | |
770 | .cra_u.ablkcipher = { | |
771 | .min_keysize = DES_KEY_SIZE, | |
772 | .max_keysize = DES_KEY_SIZE, | |
773 | .ivsize = DES_BLOCK_SIZE, | |
774 | .setkey = atmel_des_setkey, | |
775 | .encrypt = atmel_tdes_cfb8_encrypt, | |
776 | .decrypt = atmel_tdes_cfb8_decrypt, | |
777 | } | |
778 | }, | |
779 | { | |
780 | .cra_name = "cfb16(des)", | |
781 | .cra_driver_name = "atmel-cfb16-des", | |
782 | .cra_priority = 100, | |
783 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
784 | .cra_blocksize = CFB16_BLOCK_SIZE, | |
785 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
786 | .cra_alignmask = 0, | |
787 | .cra_type = &crypto_ablkcipher_type, | |
788 | .cra_module = THIS_MODULE, | |
789 | .cra_init = atmel_tdes_cra_init, | |
790 | .cra_exit = atmel_tdes_cra_exit, | |
791 | .cra_u.ablkcipher = { | |
792 | .min_keysize = DES_KEY_SIZE, | |
793 | .max_keysize = DES_KEY_SIZE, | |
794 | .ivsize = DES_BLOCK_SIZE, | |
795 | .setkey = atmel_des_setkey, | |
796 | .encrypt = atmel_tdes_cfb16_encrypt, | |
797 | .decrypt = atmel_tdes_cfb16_decrypt, | |
798 | } | |
799 | }, | |
800 | { | |
801 | .cra_name = "cfb32(des)", | |
802 | .cra_driver_name = "atmel-cfb32-des", | |
803 | .cra_priority = 100, | |
804 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
805 | .cra_blocksize = CFB32_BLOCK_SIZE, | |
806 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
807 | .cra_alignmask = 0, | |
808 | .cra_type = &crypto_ablkcipher_type, | |
809 | .cra_module = THIS_MODULE, | |
810 | .cra_init = atmel_tdes_cra_init, | |
811 | .cra_exit = atmel_tdes_cra_exit, | |
812 | .cra_u.ablkcipher = { | |
813 | .min_keysize = DES_KEY_SIZE, | |
814 | .max_keysize = DES_KEY_SIZE, | |
815 | .ivsize = DES_BLOCK_SIZE, | |
816 | .setkey = atmel_des_setkey, | |
817 | .encrypt = atmel_tdes_cfb32_encrypt, | |
818 | .decrypt = atmel_tdes_cfb32_decrypt, | |
819 | } | |
820 | }, | |
821 | { | |
822 | .cra_name = "ofb(des)", | |
823 | .cra_driver_name = "atmel-ofb-des", | |
824 | .cra_priority = 100, | |
825 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
826 | .cra_blocksize = DES_BLOCK_SIZE, | |
827 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
828 | .cra_alignmask = 0, | |
829 | .cra_type = &crypto_ablkcipher_type, | |
830 | .cra_module = THIS_MODULE, | |
831 | .cra_init = atmel_tdes_cra_init, | |
832 | .cra_exit = atmel_tdes_cra_exit, | |
833 | .cra_u.ablkcipher = { | |
834 | .min_keysize = DES_KEY_SIZE, | |
835 | .max_keysize = DES_KEY_SIZE, | |
836 | .ivsize = DES_BLOCK_SIZE, | |
837 | .setkey = atmel_des_setkey, | |
838 | .encrypt = atmel_tdes_ofb_encrypt, | |
839 | .decrypt = atmel_tdes_ofb_decrypt, | |
840 | } | |
841 | }, | |
842 | { | |
843 | .cra_name = "ecb(des3_ede)", | |
844 | .cra_driver_name = "atmel-ecb-tdes", | |
845 | .cra_priority = 100, | |
846 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
847 | .cra_blocksize = DES_BLOCK_SIZE, | |
848 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
849 | .cra_alignmask = 0, | |
850 | .cra_type = &crypto_ablkcipher_type, | |
851 | .cra_module = THIS_MODULE, | |
852 | .cra_init = atmel_tdes_cra_init, | |
853 | .cra_exit = atmel_tdes_cra_exit, | |
854 | .cra_u.ablkcipher = { | |
855 | .min_keysize = 2 * DES_KEY_SIZE, | |
856 | .max_keysize = 3 * DES_KEY_SIZE, | |
857 | .setkey = atmel_tdes_setkey, | |
858 | .encrypt = atmel_tdes_ecb_encrypt, | |
859 | .decrypt = atmel_tdes_ecb_decrypt, | |
860 | } | |
861 | }, | |
862 | { | |
863 | .cra_name = "cbc(des3_ede)", | |
864 | .cra_driver_name = "atmel-cbc-tdes", | |
865 | .cra_priority = 100, | |
866 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
867 | .cra_blocksize = DES_BLOCK_SIZE, | |
868 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
869 | .cra_alignmask = 0, | |
870 | .cra_type = &crypto_ablkcipher_type, | |
871 | .cra_module = THIS_MODULE, | |
872 | .cra_init = atmel_tdes_cra_init, | |
873 | .cra_exit = atmel_tdes_cra_exit, | |
874 | .cra_u.ablkcipher = { | |
875 | .min_keysize = 2*DES_KEY_SIZE, | |
876 | .max_keysize = 3*DES_KEY_SIZE, | |
877 | .ivsize = DES_BLOCK_SIZE, | |
878 | .setkey = atmel_tdes_setkey, | |
879 | .encrypt = atmel_tdes_cbc_encrypt, | |
880 | .decrypt = atmel_tdes_cbc_decrypt, | |
881 | } | |
882 | }, | |
883 | { | |
884 | .cra_name = "cfb(des3_ede)", | |
885 | .cra_driver_name = "atmel-cfb-tdes", | |
886 | .cra_priority = 100, | |
887 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
888 | .cra_blocksize = DES_BLOCK_SIZE, | |
889 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
890 | .cra_alignmask = 0, | |
891 | .cra_type = &crypto_ablkcipher_type, | |
892 | .cra_module = THIS_MODULE, | |
893 | .cra_init = atmel_tdes_cra_init, | |
894 | .cra_exit = atmel_tdes_cra_exit, | |
895 | .cra_u.ablkcipher = { | |
896 | .min_keysize = 2*DES_KEY_SIZE, | |
897 | .max_keysize = 2*DES_KEY_SIZE, | |
898 | .ivsize = DES_BLOCK_SIZE, | |
899 | .setkey = atmel_tdes_setkey, | |
900 | .encrypt = atmel_tdes_cfb_encrypt, | |
901 | .decrypt = atmel_tdes_cfb_decrypt, | |
902 | } | |
903 | }, | |
904 | { | |
905 | .cra_name = "cfb8(des3_ede)", | |
906 | .cra_driver_name = "atmel-cfb8-tdes", | |
907 | .cra_priority = 100, | |
908 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
909 | .cra_blocksize = CFB8_BLOCK_SIZE, | |
910 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
911 | .cra_alignmask = 0, | |
912 | .cra_type = &crypto_ablkcipher_type, | |
913 | .cra_module = THIS_MODULE, | |
914 | .cra_init = atmel_tdes_cra_init, | |
915 | .cra_exit = atmel_tdes_cra_exit, | |
916 | .cra_u.ablkcipher = { | |
917 | .min_keysize = 2*DES_KEY_SIZE, | |
918 | .max_keysize = 2*DES_KEY_SIZE, | |
919 | .ivsize = DES_BLOCK_SIZE, | |
920 | .setkey = atmel_tdes_setkey, | |
921 | .encrypt = atmel_tdes_cfb8_encrypt, | |
922 | .decrypt = atmel_tdes_cfb8_decrypt, | |
923 | } | |
924 | }, | |
925 | { | |
926 | .cra_name = "cfb16(des3_ede)", | |
927 | .cra_driver_name = "atmel-cfb16-tdes", | |
928 | .cra_priority = 100, | |
929 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
930 | .cra_blocksize = CFB16_BLOCK_SIZE, | |
931 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
932 | .cra_alignmask = 0, | |
933 | .cra_type = &crypto_ablkcipher_type, | |
934 | .cra_module = THIS_MODULE, | |
935 | .cra_init = atmel_tdes_cra_init, | |
936 | .cra_exit = atmel_tdes_cra_exit, | |
937 | .cra_u.ablkcipher = { | |
938 | .min_keysize = 2*DES_KEY_SIZE, | |
939 | .max_keysize = 2*DES_KEY_SIZE, | |
940 | .ivsize = DES_BLOCK_SIZE, | |
941 | .setkey = atmel_tdes_setkey, | |
942 | .encrypt = atmel_tdes_cfb16_encrypt, | |
943 | .decrypt = atmel_tdes_cfb16_decrypt, | |
944 | } | |
945 | }, | |
946 | { | |
947 | .cra_name = "cfb32(des3_ede)", | |
948 | .cra_driver_name = "atmel-cfb32-tdes", | |
949 | .cra_priority = 100, | |
950 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
951 | .cra_blocksize = CFB32_BLOCK_SIZE, | |
952 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
953 | .cra_alignmask = 0, | |
954 | .cra_type = &crypto_ablkcipher_type, | |
955 | .cra_module = THIS_MODULE, | |
956 | .cra_init = atmel_tdes_cra_init, | |
957 | .cra_exit = atmel_tdes_cra_exit, | |
958 | .cra_u.ablkcipher = { | |
959 | .min_keysize = 2*DES_KEY_SIZE, | |
960 | .max_keysize = 2*DES_KEY_SIZE, | |
961 | .ivsize = DES_BLOCK_SIZE, | |
962 | .setkey = atmel_tdes_setkey, | |
963 | .encrypt = atmel_tdes_cfb32_encrypt, | |
964 | .decrypt = atmel_tdes_cfb32_decrypt, | |
965 | } | |
966 | }, | |
967 | { | |
968 | .cra_name = "ofb(des3_ede)", | |
969 | .cra_driver_name = "atmel-ofb-tdes", | |
970 | .cra_priority = 100, | |
971 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
972 | .cra_blocksize = DES_BLOCK_SIZE, | |
973 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
974 | .cra_alignmask = 0, | |
975 | .cra_type = &crypto_ablkcipher_type, | |
976 | .cra_module = THIS_MODULE, | |
977 | .cra_init = atmel_tdes_cra_init, | |
978 | .cra_exit = atmel_tdes_cra_exit, | |
979 | .cra_u.ablkcipher = { | |
980 | .min_keysize = 2*DES_KEY_SIZE, | |
981 | .max_keysize = 3*DES_KEY_SIZE, | |
982 | .ivsize = DES_BLOCK_SIZE, | |
983 | .setkey = atmel_tdes_setkey, | |
984 | .encrypt = atmel_tdes_ofb_encrypt, | |
985 | .decrypt = atmel_tdes_ofb_decrypt, | |
986 | } | |
987 | }, | |
988 | }; | |
989 | ||
990 | static void atmel_tdes_queue_task(unsigned long data) | |
991 | { | |
992 | struct atmel_tdes_dev *dd = (struct atmel_tdes_dev *)data; | |
993 | ||
994 | atmel_tdes_handle_queue(dd, NULL); | |
995 | } | |
996 | ||
997 | static void atmel_tdes_done_task(unsigned long data) | |
998 | { | |
999 | struct atmel_tdes_dev *dd = (struct atmel_tdes_dev *) data; | |
1000 | int err; | |
1001 | ||
1002 | err = atmel_tdes_crypt_dma_stop(dd); | |
1003 | ||
1004 | err = dd->err ? : err; | |
1005 | ||
1006 | if (dd->total && !err) { | |
1007 | err = atmel_tdes_crypt_dma_start(dd); | |
1008 | if (!err) | |
1009 | return; | |
1010 | } | |
1011 | ||
1012 | atmel_tdes_finish_req(dd, err); | |
1013 | atmel_tdes_handle_queue(dd, NULL); | |
1014 | } | |
1015 | ||
1016 | static irqreturn_t atmel_tdes_irq(int irq, void *dev_id) | |
1017 | { | |
1018 | struct atmel_tdes_dev *tdes_dd = dev_id; | |
1019 | u32 reg; | |
1020 | ||
1021 | reg = atmel_tdes_read(tdes_dd, TDES_ISR); | |
1022 | if (reg & atmel_tdes_read(tdes_dd, TDES_IMR)) { | |
1023 | atmel_tdes_write(tdes_dd, TDES_IDR, reg); | |
1024 | if (TDES_FLAGS_BUSY & tdes_dd->flags) | |
1025 | tasklet_schedule(&tdes_dd->done_task); | |
1026 | else | |
1027 | dev_warn(tdes_dd->dev, "TDES interrupt when no active requests.\n"); | |
1028 | return IRQ_HANDLED; | |
1029 | } | |
1030 | ||
1031 | return IRQ_NONE; | |
1032 | } | |
1033 | ||
1034 | static void atmel_tdes_unregister_algs(struct atmel_tdes_dev *dd) | |
1035 | { | |
1036 | int i; | |
1037 | ||
1038 | for (i = 0; i < ARRAY_SIZE(tdes_algs); i++) | |
1039 | crypto_unregister_alg(&tdes_algs[i]); | |
1040 | } | |
1041 | ||
1042 | static int atmel_tdes_register_algs(struct atmel_tdes_dev *dd) | |
1043 | { | |
1044 | int err, i, j; | |
1045 | ||
1046 | for (i = 0; i < ARRAY_SIZE(tdes_algs); i++) { | |
1047 | INIT_LIST_HEAD(&tdes_algs[i].cra_list); | |
1048 | err = crypto_register_alg(&tdes_algs[i]); | |
1049 | if (err) | |
1050 | goto err_tdes_algs; | |
1051 | } | |
1052 | ||
1053 | return 0; | |
1054 | ||
1055 | err_tdes_algs: | |
1056 | for (j = 0; j < i; j++) | |
1057 | crypto_unregister_alg(&tdes_algs[j]); | |
1058 | ||
1059 | return err; | |
1060 | } | |
1061 | ||
1062 | static int __devinit atmel_tdes_probe(struct platform_device *pdev) | |
1063 | { | |
1064 | struct atmel_tdes_dev *tdes_dd; | |
1065 | struct device *dev = &pdev->dev; | |
1066 | struct resource *tdes_res; | |
1067 | unsigned long tdes_phys_size; | |
1068 | int err; | |
1069 | ||
1070 | tdes_dd = kzalloc(sizeof(struct atmel_tdes_dev), GFP_KERNEL); | |
1071 | if (tdes_dd == NULL) { | |
1072 | dev_err(dev, "unable to alloc data struct.\n"); | |
1073 | err = -ENOMEM; | |
1074 | goto tdes_dd_err; | |
1075 | } | |
1076 | ||
1077 | tdes_dd->dev = dev; | |
1078 | ||
1079 | platform_set_drvdata(pdev, tdes_dd); | |
1080 | ||
1081 | INIT_LIST_HEAD(&tdes_dd->list); | |
1082 | ||
1083 | tasklet_init(&tdes_dd->done_task, atmel_tdes_done_task, | |
1084 | (unsigned long)tdes_dd); | |
1085 | tasklet_init(&tdes_dd->queue_task, atmel_tdes_queue_task, | |
1086 | (unsigned long)tdes_dd); | |
1087 | ||
1088 | crypto_init_queue(&tdes_dd->queue, ATMEL_TDES_QUEUE_LENGTH); | |
1089 | ||
1090 | tdes_dd->irq = -1; | |
1091 | ||
1092 | /* Get the base address */ | |
1093 | tdes_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1094 | if (!tdes_res) { | |
1095 | dev_err(dev, "no MEM resource info\n"); | |
1096 | err = -ENODEV; | |
1097 | goto res_err; | |
1098 | } | |
1099 | tdes_dd->phys_base = tdes_res->start; | |
1100 | tdes_phys_size = resource_size(tdes_res); | |
1101 | ||
1102 | /* Get the IRQ */ | |
1103 | tdes_dd->irq = platform_get_irq(pdev, 0); | |
1104 | if (tdes_dd->irq < 0) { | |
1105 | dev_err(dev, "no IRQ resource info\n"); | |
1106 | err = tdes_dd->irq; | |
1107 | goto res_err; | |
1108 | } | |
1109 | ||
1110 | err = request_irq(tdes_dd->irq, atmel_tdes_irq, IRQF_SHARED, | |
1111 | "atmel-tdes", tdes_dd); | |
1112 | if (err) { | |
1113 | dev_err(dev, "unable to request tdes irq.\n"); | |
1114 | goto tdes_irq_err; | |
1115 | } | |
1116 | ||
1117 | /* Initializing the clock */ | |
1118 | tdes_dd->iclk = clk_get(&pdev->dev, NULL); | |
1119 | if (IS_ERR(tdes_dd->iclk)) { | |
1120 | dev_err(dev, "clock intialization failed.\n"); | |
1121 | err = PTR_ERR(tdes_dd->iclk); | |
1122 | goto clk_err; | |
1123 | } | |
1124 | ||
1125 | tdes_dd->io_base = ioremap(tdes_dd->phys_base, tdes_phys_size); | |
1126 | if (!tdes_dd->io_base) { | |
1127 | dev_err(dev, "can't ioremap\n"); | |
1128 | err = -ENOMEM; | |
1129 | goto tdes_io_err; | |
1130 | } | |
1131 | ||
1132 | err = atmel_tdes_dma_init(tdes_dd); | |
1133 | if (err) | |
1134 | goto err_tdes_dma; | |
1135 | ||
1136 | spin_lock(&atmel_tdes.lock); | |
1137 | list_add_tail(&tdes_dd->list, &atmel_tdes.dev_list); | |
1138 | spin_unlock(&atmel_tdes.lock); | |
1139 | ||
1140 | err = atmel_tdes_register_algs(tdes_dd); | |
1141 | if (err) | |
1142 | goto err_algs; | |
1143 | ||
1144 | dev_info(dev, "Atmel DES/TDES\n"); | |
1145 | ||
1146 | return 0; | |
1147 | ||
1148 | err_algs: | |
1149 | spin_lock(&atmel_tdes.lock); | |
1150 | list_del(&tdes_dd->list); | |
1151 | spin_unlock(&atmel_tdes.lock); | |
1152 | atmel_tdes_dma_cleanup(tdes_dd); | |
1153 | err_tdes_dma: | |
1154 | iounmap(tdes_dd->io_base); | |
1155 | tdes_io_err: | |
1156 | clk_put(tdes_dd->iclk); | |
1157 | clk_err: | |
1158 | free_irq(tdes_dd->irq, tdes_dd); | |
1159 | tdes_irq_err: | |
1160 | res_err: | |
1161 | tasklet_kill(&tdes_dd->done_task); | |
1162 | tasklet_kill(&tdes_dd->queue_task); | |
1163 | kfree(tdes_dd); | |
1164 | tdes_dd = NULL; | |
1165 | tdes_dd_err: | |
1166 | dev_err(dev, "initialization failed.\n"); | |
1167 | ||
1168 | return err; | |
1169 | } | |
1170 | ||
1171 | static int __devexit atmel_tdes_remove(struct platform_device *pdev) | |
1172 | { | |
1173 | static struct atmel_tdes_dev *tdes_dd; | |
1174 | ||
1175 | tdes_dd = platform_get_drvdata(pdev); | |
1176 | if (!tdes_dd) | |
1177 | return -ENODEV; | |
1178 | spin_lock(&atmel_tdes.lock); | |
1179 | list_del(&tdes_dd->list); | |
1180 | spin_unlock(&atmel_tdes.lock); | |
1181 | ||
1182 | atmel_tdes_unregister_algs(tdes_dd); | |
1183 | ||
1184 | tasklet_kill(&tdes_dd->done_task); | |
1185 | tasklet_kill(&tdes_dd->queue_task); | |
1186 | ||
1187 | atmel_tdes_dma_cleanup(tdes_dd); | |
1188 | ||
1189 | iounmap(tdes_dd->io_base); | |
1190 | ||
1191 | clk_put(tdes_dd->iclk); | |
1192 | ||
1193 | if (tdes_dd->irq >= 0) | |
1194 | free_irq(tdes_dd->irq, tdes_dd); | |
1195 | ||
1196 | kfree(tdes_dd); | |
1197 | tdes_dd = NULL; | |
1198 | ||
1199 | return 0; | |
1200 | } | |
1201 | ||
1202 | static struct platform_driver atmel_tdes_driver = { | |
1203 | .probe = atmel_tdes_probe, | |
1204 | .remove = __devexit_p(atmel_tdes_remove), | |
1205 | .driver = { | |
1206 | .name = "atmel_tdes", | |
1207 | .owner = THIS_MODULE, | |
1208 | }, | |
1209 | }; | |
1210 | ||
1211 | module_platform_driver(atmel_tdes_driver); | |
1212 | ||
1213 | MODULE_DESCRIPTION("Atmel DES/TDES hw acceleration support."); | |
1214 | MODULE_LICENSE("GPL v2"); | |
1215 | MODULE_AUTHOR("Nicolas Royer - Eukréa Electromatique"); |