]>
Commit | Line | Data |
---|---|---|
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> | |
13802005 NR |
27 | #include <linux/init.h> |
28 | #include <linux/errno.h> | |
29 | #include <linux/interrupt.h> | |
13802005 | 30 | #include <linux/irq.h> |
13802005 NR |
31 | #include <linux/scatterlist.h> |
32 | #include <linux/dma-mapping.h> | |
84c8976b | 33 | #include <linux/of_device.h> |
13802005 NR |
34 | #include <linux/delay.h> |
35 | #include <linux/crypto.h> | |
36 | #include <linux/cryptohash.h> | |
37 | #include <crypto/scatterwalk.h> | |
38 | #include <crypto/algapi.h> | |
39 | #include <crypto/des.h> | |
40 | #include <crypto/hash.h> | |
41 | #include <crypto/internal/hash.h> | |
1f858040 | 42 | #include <linux/platform_data/crypto-atmel.h> |
13802005 NR |
43 | #include "atmel-tdes-regs.h" |
44 | ||
45 | /* TDES flags */ | |
1f858040 | 46 | #define TDES_FLAGS_MODE_MASK 0x00ff |
13802005 NR |
47 | #define TDES_FLAGS_ENCRYPT BIT(0) |
48 | #define TDES_FLAGS_CBC BIT(1) | |
49 | #define TDES_FLAGS_CFB BIT(2) | |
50 | #define TDES_FLAGS_CFB8 BIT(3) | |
51 | #define TDES_FLAGS_CFB16 BIT(4) | |
52 | #define TDES_FLAGS_CFB32 BIT(5) | |
1f858040 NR |
53 | #define TDES_FLAGS_CFB64 BIT(6) |
54 | #define TDES_FLAGS_OFB BIT(7) | |
13802005 NR |
55 | |
56 | #define TDES_FLAGS_INIT BIT(16) | |
57 | #define TDES_FLAGS_FAST BIT(17) | |
58 | #define TDES_FLAGS_BUSY BIT(18) | |
1f858040 | 59 | #define TDES_FLAGS_DMA BIT(19) |
13802005 | 60 | |
1f858040 | 61 | #define ATMEL_TDES_QUEUE_LENGTH 50 |
13802005 NR |
62 | |
63 | #define CFB8_BLOCK_SIZE 1 | |
64 | #define CFB16_BLOCK_SIZE 2 | |
65 | #define CFB32_BLOCK_SIZE 4 | |
13802005 | 66 | |
1f858040 NR |
67 | struct atmel_tdes_caps { |
68 | bool has_dma; | |
69 | u32 has_cfb_3keys; | |
70 | }; | |
13802005 NR |
71 | |
72 | struct atmel_tdes_dev; | |
73 | ||
74 | struct atmel_tdes_ctx { | |
75 | struct atmel_tdes_dev *dd; | |
76 | ||
77 | int keylen; | |
78 | u32 key[3*DES_KEY_SIZE / sizeof(u32)]; | |
79 | unsigned long flags; | |
1f858040 NR |
80 | |
81 | u16 block_size; | |
13802005 NR |
82 | }; |
83 | ||
84 | struct atmel_tdes_reqctx { | |
85 | unsigned long mode; | |
86 | }; | |
87 | ||
1f858040 NR |
88 | struct atmel_tdes_dma { |
89 | struct dma_chan *chan; | |
90 | struct dma_slave_config dma_conf; | |
91 | }; | |
92 | ||
13802005 NR |
93 | struct atmel_tdes_dev { |
94 | struct list_head list; | |
95 | unsigned long phys_base; | |
96 | void __iomem *io_base; | |
97 | ||
98 | struct atmel_tdes_ctx *ctx; | |
99 | struct device *dev; | |
100 | struct clk *iclk; | |
101 | int irq; | |
102 | ||
103 | unsigned long flags; | |
104 | int err; | |
105 | ||
106 | spinlock_t lock; | |
107 | struct crypto_queue queue; | |
108 | ||
109 | struct tasklet_struct done_task; | |
110 | struct tasklet_struct queue_task; | |
111 | ||
112 | struct ablkcipher_request *req; | |
113 | size_t total; | |
114 | ||
115 | struct scatterlist *in_sg; | |
1f858040 | 116 | unsigned int nb_in_sg; |
13802005 NR |
117 | size_t in_offset; |
118 | struct scatterlist *out_sg; | |
1f858040 | 119 | unsigned int nb_out_sg; |
13802005 NR |
120 | size_t out_offset; |
121 | ||
122 | size_t buflen; | |
123 | size_t dma_size; | |
124 | ||
125 | void *buf_in; | |
126 | int dma_in; | |
127 | dma_addr_t dma_addr_in; | |
1f858040 | 128 | struct atmel_tdes_dma dma_lch_in; |
13802005 NR |
129 | |
130 | void *buf_out; | |
131 | int dma_out; | |
132 | dma_addr_t dma_addr_out; | |
1f858040 NR |
133 | struct atmel_tdes_dma dma_lch_out; |
134 | ||
135 | struct atmel_tdes_caps caps; | |
136 | ||
137 | u32 hw_version; | |
13802005 NR |
138 | }; |
139 | ||
140 | struct atmel_tdes_drv { | |
141 | struct list_head dev_list; | |
142 | spinlock_t lock; | |
143 | }; | |
144 | ||
145 | static struct atmel_tdes_drv atmel_tdes = { | |
146 | .dev_list = LIST_HEAD_INIT(atmel_tdes.dev_list), | |
147 | .lock = __SPIN_LOCK_UNLOCKED(atmel_tdes.lock), | |
148 | }; | |
149 | ||
150 | static int atmel_tdes_sg_copy(struct scatterlist **sg, size_t *offset, | |
151 | void *buf, size_t buflen, size_t total, int out) | |
152 | { | |
4c147bcf | 153 | size_t count, off = 0; |
13802005 NR |
154 | |
155 | while (buflen && total) { | |
156 | count = min((*sg)->length - *offset, total); | |
157 | count = min(count, buflen); | |
158 | ||
159 | if (!count) | |
160 | return off; | |
161 | ||
162 | scatterwalk_map_and_copy(buf + off, *sg, *offset, count, out); | |
163 | ||
164 | off += count; | |
165 | buflen -= count; | |
166 | *offset += count; | |
167 | total -= count; | |
168 | ||
169 | if (*offset == (*sg)->length) { | |
170 | *sg = sg_next(*sg); | |
171 | if (*sg) | |
172 | *offset = 0; | |
173 | else | |
174 | total = 0; | |
175 | } | |
176 | } | |
177 | ||
178 | return off; | |
179 | } | |
180 | ||
181 | static inline u32 atmel_tdes_read(struct atmel_tdes_dev *dd, u32 offset) | |
182 | { | |
183 | return readl_relaxed(dd->io_base + offset); | |
184 | } | |
185 | ||
186 | static inline void atmel_tdes_write(struct atmel_tdes_dev *dd, | |
187 | u32 offset, u32 value) | |
188 | { | |
189 | writel_relaxed(value, dd->io_base + offset); | |
190 | } | |
191 | ||
192 | static void atmel_tdes_write_n(struct atmel_tdes_dev *dd, u32 offset, | |
193 | u32 *value, int count) | |
194 | { | |
195 | for (; count--; value++, offset += 4) | |
196 | atmel_tdes_write(dd, offset, *value); | |
197 | } | |
198 | ||
199 | static struct atmel_tdes_dev *atmel_tdes_find_dev(struct atmel_tdes_ctx *ctx) | |
200 | { | |
201 | struct atmel_tdes_dev *tdes_dd = NULL; | |
202 | struct atmel_tdes_dev *tmp; | |
203 | ||
204 | spin_lock_bh(&atmel_tdes.lock); | |
205 | if (!ctx->dd) { | |
206 | list_for_each_entry(tmp, &atmel_tdes.dev_list, list) { | |
207 | tdes_dd = tmp; | |
208 | break; | |
209 | } | |
210 | ctx->dd = tdes_dd; | |
211 | } else { | |
212 | tdes_dd = ctx->dd; | |
213 | } | |
214 | spin_unlock_bh(&atmel_tdes.lock); | |
215 | ||
216 | return tdes_dd; | |
217 | } | |
218 | ||
219 | static int atmel_tdes_hw_init(struct atmel_tdes_dev *dd) | |
220 | { | |
9d83d299 LC |
221 | int err; |
222 | ||
223 | err = clk_prepare_enable(dd->iclk); | |
224 | if (err) | |
225 | return err; | |
13802005 NR |
226 | |
227 | if (!(dd->flags & TDES_FLAGS_INIT)) { | |
228 | atmel_tdes_write(dd, TDES_CR, TDES_CR_SWRST); | |
229 | dd->flags |= TDES_FLAGS_INIT; | |
230 | dd->err = 0; | |
231 | } | |
232 | ||
233 | return 0; | |
234 | } | |
235 | ||
1f858040 NR |
236 | static inline unsigned int atmel_tdes_get_version(struct atmel_tdes_dev *dd) |
237 | { | |
238 | return atmel_tdes_read(dd, TDES_HW_VERSION) & 0x00000fff; | |
239 | } | |
240 | ||
241 | static void atmel_tdes_hw_version_init(struct atmel_tdes_dev *dd) | |
242 | { | |
243 | atmel_tdes_hw_init(dd); | |
244 | ||
245 | dd->hw_version = atmel_tdes_get_version(dd); | |
246 | ||
247 | dev_info(dd->dev, | |
248 | "version: 0x%x\n", dd->hw_version); | |
249 | ||
250 | clk_disable_unprepare(dd->iclk); | |
251 | } | |
252 | ||
253 | static void atmel_tdes_dma_callback(void *data) | |
254 | { | |
255 | struct atmel_tdes_dev *dd = data; | |
256 | ||
257 | /* dma_lch_out - completed */ | |
258 | tasklet_schedule(&dd->done_task); | |
259 | } | |
260 | ||
13802005 NR |
261 | static int atmel_tdes_write_ctrl(struct atmel_tdes_dev *dd) |
262 | { | |
263 | int err; | |
264 | u32 valcr = 0, valmr = TDES_MR_SMOD_PDC; | |
265 | ||
266 | err = atmel_tdes_hw_init(dd); | |
267 | ||
268 | if (err) | |
269 | return err; | |
270 | ||
1f858040 NR |
271 | if (!dd->caps.has_dma) |
272 | atmel_tdes_write(dd, TDES_PTCR, | |
273 | TDES_PTCR_TXTDIS | TDES_PTCR_RXTDIS); | |
13802005 NR |
274 | |
275 | /* MR register must be set before IV registers */ | |
276 | if (dd->ctx->keylen > (DES_KEY_SIZE << 1)) { | |
277 | valmr |= TDES_MR_KEYMOD_3KEY; | |
278 | valmr |= TDES_MR_TDESMOD_TDES; | |
279 | } else if (dd->ctx->keylen > DES_KEY_SIZE) { | |
280 | valmr |= TDES_MR_KEYMOD_2KEY; | |
281 | valmr |= TDES_MR_TDESMOD_TDES; | |
282 | } else { | |
283 | valmr |= TDES_MR_TDESMOD_DES; | |
284 | } | |
285 | ||
286 | if (dd->flags & TDES_FLAGS_CBC) { | |
287 | valmr |= TDES_MR_OPMOD_CBC; | |
288 | } else if (dd->flags & TDES_FLAGS_CFB) { | |
289 | valmr |= TDES_MR_OPMOD_CFB; | |
290 | ||
291 | if (dd->flags & TDES_FLAGS_CFB8) | |
292 | valmr |= TDES_MR_CFBS_8b; | |
293 | else if (dd->flags & TDES_FLAGS_CFB16) | |
294 | valmr |= TDES_MR_CFBS_16b; | |
295 | else if (dd->flags & TDES_FLAGS_CFB32) | |
296 | valmr |= TDES_MR_CFBS_32b; | |
1f858040 NR |
297 | else if (dd->flags & TDES_FLAGS_CFB64) |
298 | valmr |= TDES_MR_CFBS_64b; | |
13802005 NR |
299 | } else if (dd->flags & TDES_FLAGS_OFB) { |
300 | valmr |= TDES_MR_OPMOD_OFB; | |
301 | } | |
302 | ||
303 | if ((dd->flags & TDES_FLAGS_ENCRYPT) || (dd->flags & TDES_FLAGS_OFB)) | |
304 | valmr |= TDES_MR_CYPHER_ENC; | |
305 | ||
306 | atmel_tdes_write(dd, TDES_CR, valcr); | |
307 | atmel_tdes_write(dd, TDES_MR, valmr); | |
308 | ||
309 | atmel_tdes_write_n(dd, TDES_KEY1W1R, dd->ctx->key, | |
310 | dd->ctx->keylen >> 2); | |
311 | ||
312 | if (((dd->flags & TDES_FLAGS_CBC) || (dd->flags & TDES_FLAGS_CFB) || | |
313 | (dd->flags & TDES_FLAGS_OFB)) && dd->req->info) { | |
314 | atmel_tdes_write_n(dd, TDES_IV1R, dd->req->info, 2); | |
315 | } | |
316 | ||
317 | return 0; | |
318 | } | |
319 | ||
1f858040 | 320 | static int atmel_tdes_crypt_pdc_stop(struct atmel_tdes_dev *dd) |
13802005 NR |
321 | { |
322 | int err = 0; | |
323 | size_t count; | |
324 | ||
325 | atmel_tdes_write(dd, TDES_PTCR, TDES_PTCR_TXTDIS|TDES_PTCR_RXTDIS); | |
326 | ||
327 | if (dd->flags & TDES_FLAGS_FAST) { | |
328 | dma_unmap_sg(dd->dev, dd->out_sg, 1, DMA_FROM_DEVICE); | |
329 | dma_unmap_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE); | |
330 | } else { | |
331 | dma_sync_single_for_device(dd->dev, dd->dma_addr_out, | |
332 | dd->dma_size, DMA_FROM_DEVICE); | |
333 | ||
334 | /* copy data */ | |
335 | count = atmel_tdes_sg_copy(&dd->out_sg, &dd->out_offset, | |
336 | dd->buf_out, dd->buflen, dd->dma_size, 1); | |
337 | if (count != dd->dma_size) { | |
338 | err = -EINVAL; | |
4c147bcf | 339 | pr_err("not all data converted: %zu\n", count); |
13802005 NR |
340 | } |
341 | } | |
342 | ||
343 | return err; | |
344 | } | |
345 | ||
1f858040 | 346 | static int atmel_tdes_buff_init(struct atmel_tdes_dev *dd) |
13802005 NR |
347 | { |
348 | int err = -ENOMEM; | |
349 | ||
350 | dd->buf_in = (void *)__get_free_pages(GFP_KERNEL, 0); | |
351 | dd->buf_out = (void *)__get_free_pages(GFP_KERNEL, 0); | |
352 | dd->buflen = PAGE_SIZE; | |
353 | dd->buflen &= ~(DES_BLOCK_SIZE - 1); | |
354 | ||
355 | if (!dd->buf_in || !dd->buf_out) { | |
356 | dev_err(dd->dev, "unable to alloc pages.\n"); | |
357 | goto err_alloc; | |
358 | } | |
359 | ||
360 | /* MAP here */ | |
361 | dd->dma_addr_in = dma_map_single(dd->dev, dd->buf_in, | |
362 | dd->buflen, DMA_TO_DEVICE); | |
363 | if (dma_mapping_error(dd->dev, dd->dma_addr_in)) { | |
4c147bcf | 364 | dev_err(dd->dev, "dma %zd bytes error\n", dd->buflen); |
13802005 NR |
365 | err = -EINVAL; |
366 | goto err_map_in; | |
367 | } | |
368 | ||
369 | dd->dma_addr_out = dma_map_single(dd->dev, dd->buf_out, | |
370 | dd->buflen, DMA_FROM_DEVICE); | |
371 | if (dma_mapping_error(dd->dev, dd->dma_addr_out)) { | |
4c147bcf | 372 | dev_err(dd->dev, "dma %zd bytes error\n", dd->buflen); |
13802005 NR |
373 | err = -EINVAL; |
374 | goto err_map_out; | |
375 | } | |
376 | ||
377 | return 0; | |
378 | ||
379 | err_map_out: | |
380 | dma_unmap_single(dd->dev, dd->dma_addr_in, dd->buflen, | |
381 | DMA_TO_DEVICE); | |
382 | err_map_in: | |
088f628c | 383 | err_alloc: |
13802005 NR |
384 | free_page((unsigned long)dd->buf_out); |
385 | free_page((unsigned long)dd->buf_in); | |
13802005 NR |
386 | if (err) |
387 | pr_err("error: %d\n", err); | |
388 | return err; | |
389 | } | |
390 | ||
1f858040 | 391 | static void atmel_tdes_buff_cleanup(struct atmel_tdes_dev *dd) |
13802005 NR |
392 | { |
393 | dma_unmap_single(dd->dev, dd->dma_addr_out, dd->buflen, | |
394 | DMA_FROM_DEVICE); | |
395 | dma_unmap_single(dd->dev, dd->dma_addr_in, dd->buflen, | |
396 | DMA_TO_DEVICE); | |
397 | free_page((unsigned long)dd->buf_out); | |
398 | free_page((unsigned long)dd->buf_in); | |
399 | } | |
400 | ||
1f858040 | 401 | static int atmel_tdes_crypt_pdc(struct crypto_tfm *tfm, dma_addr_t dma_addr_in, |
13802005 NR |
402 | dma_addr_t dma_addr_out, int length) |
403 | { | |
404 | struct atmel_tdes_ctx *ctx = crypto_tfm_ctx(tfm); | |
405 | struct atmel_tdes_dev *dd = ctx->dd; | |
406 | int len32; | |
407 | ||
408 | dd->dma_size = length; | |
409 | ||
410 | if (!(dd->flags & TDES_FLAGS_FAST)) { | |
411 | dma_sync_single_for_device(dd->dev, dma_addr_in, length, | |
412 | DMA_TO_DEVICE); | |
413 | } | |
414 | ||
415 | if ((dd->flags & TDES_FLAGS_CFB) && (dd->flags & TDES_FLAGS_CFB8)) | |
416 | len32 = DIV_ROUND_UP(length, sizeof(u8)); | |
417 | else if ((dd->flags & TDES_FLAGS_CFB) && (dd->flags & TDES_FLAGS_CFB16)) | |
418 | len32 = DIV_ROUND_UP(length, sizeof(u16)); | |
419 | else | |
420 | len32 = DIV_ROUND_UP(length, sizeof(u32)); | |
421 | ||
422 | atmel_tdes_write(dd, TDES_PTCR, TDES_PTCR_TXTDIS|TDES_PTCR_RXTDIS); | |
423 | atmel_tdes_write(dd, TDES_TPR, dma_addr_in); | |
424 | atmel_tdes_write(dd, TDES_TCR, len32); | |
425 | atmel_tdes_write(dd, TDES_RPR, dma_addr_out); | |
426 | atmel_tdes_write(dd, TDES_RCR, len32); | |
427 | ||
428 | /* Enable Interrupt */ | |
429 | atmel_tdes_write(dd, TDES_IER, TDES_INT_ENDRX); | |
430 | ||
431 | /* Start DMA transfer */ | |
432 | atmel_tdes_write(dd, TDES_PTCR, TDES_PTCR_TXTEN | TDES_PTCR_RXTEN); | |
433 | ||
434 | return 0; | |
435 | } | |
436 | ||
1f858040 NR |
437 | static int atmel_tdes_crypt_dma(struct crypto_tfm *tfm, dma_addr_t dma_addr_in, |
438 | dma_addr_t dma_addr_out, int length) | |
439 | { | |
440 | struct atmel_tdes_ctx *ctx = crypto_tfm_ctx(tfm); | |
441 | struct atmel_tdes_dev *dd = ctx->dd; | |
442 | struct scatterlist sg[2]; | |
443 | struct dma_async_tx_descriptor *in_desc, *out_desc; | |
444 | ||
445 | dd->dma_size = length; | |
446 | ||
447 | if (!(dd->flags & TDES_FLAGS_FAST)) { | |
448 | dma_sync_single_for_device(dd->dev, dma_addr_in, length, | |
449 | DMA_TO_DEVICE); | |
450 | } | |
451 | ||
452 | if (dd->flags & TDES_FLAGS_CFB8) { | |
453 | dd->dma_lch_in.dma_conf.dst_addr_width = | |
454 | DMA_SLAVE_BUSWIDTH_1_BYTE; | |
455 | dd->dma_lch_out.dma_conf.src_addr_width = | |
456 | DMA_SLAVE_BUSWIDTH_1_BYTE; | |
457 | } else if (dd->flags & TDES_FLAGS_CFB16) { | |
458 | dd->dma_lch_in.dma_conf.dst_addr_width = | |
459 | DMA_SLAVE_BUSWIDTH_2_BYTES; | |
460 | dd->dma_lch_out.dma_conf.src_addr_width = | |
461 | DMA_SLAVE_BUSWIDTH_2_BYTES; | |
462 | } else { | |
463 | dd->dma_lch_in.dma_conf.dst_addr_width = | |
464 | DMA_SLAVE_BUSWIDTH_4_BYTES; | |
465 | dd->dma_lch_out.dma_conf.src_addr_width = | |
466 | DMA_SLAVE_BUSWIDTH_4_BYTES; | |
467 | } | |
468 | ||
469 | dmaengine_slave_config(dd->dma_lch_in.chan, &dd->dma_lch_in.dma_conf); | |
470 | dmaengine_slave_config(dd->dma_lch_out.chan, &dd->dma_lch_out.dma_conf); | |
471 | ||
472 | dd->flags |= TDES_FLAGS_DMA; | |
473 | ||
474 | sg_init_table(&sg[0], 1); | |
475 | sg_dma_address(&sg[0]) = dma_addr_in; | |
476 | sg_dma_len(&sg[0]) = length; | |
477 | ||
478 | sg_init_table(&sg[1], 1); | |
479 | sg_dma_address(&sg[1]) = dma_addr_out; | |
480 | sg_dma_len(&sg[1]) = length; | |
481 | ||
482 | in_desc = dmaengine_prep_slave_sg(dd->dma_lch_in.chan, &sg[0], | |
483 | 1, DMA_MEM_TO_DEV, | |
484 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); | |
485 | if (!in_desc) | |
486 | return -EINVAL; | |
487 | ||
488 | out_desc = dmaengine_prep_slave_sg(dd->dma_lch_out.chan, &sg[1], | |
489 | 1, DMA_DEV_TO_MEM, | |
490 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); | |
491 | if (!out_desc) | |
492 | return -EINVAL; | |
493 | ||
494 | out_desc->callback = atmel_tdes_dma_callback; | |
495 | out_desc->callback_param = dd; | |
496 | ||
497 | dmaengine_submit(out_desc); | |
498 | dma_async_issue_pending(dd->dma_lch_out.chan); | |
499 | ||
500 | dmaengine_submit(in_desc); | |
501 | dma_async_issue_pending(dd->dma_lch_in.chan); | |
502 | ||
503 | return 0; | |
504 | } | |
505 | ||
506 | static int atmel_tdes_crypt_start(struct atmel_tdes_dev *dd) | |
13802005 NR |
507 | { |
508 | struct crypto_tfm *tfm = crypto_ablkcipher_tfm( | |
509 | crypto_ablkcipher_reqtfm(dd->req)); | |
510 | int err, fast = 0, in, out; | |
511 | size_t count; | |
512 | dma_addr_t addr_in, addr_out; | |
513 | ||
1f858040 | 514 | if ((!dd->in_offset) && (!dd->out_offset)) { |
13802005 | 515 | /* check for alignment */ |
1f858040 NR |
516 | in = IS_ALIGNED((u32)dd->in_sg->offset, sizeof(u32)) && |
517 | IS_ALIGNED(dd->in_sg->length, dd->ctx->block_size); | |
518 | out = IS_ALIGNED((u32)dd->out_sg->offset, sizeof(u32)) && | |
519 | IS_ALIGNED(dd->out_sg->length, dd->ctx->block_size); | |
13802005 | 520 | fast = in && out; |
1f858040 NR |
521 | |
522 | if (sg_dma_len(dd->in_sg) != sg_dma_len(dd->out_sg)) | |
523 | fast = 0; | |
13802005 NR |
524 | } |
525 | ||
1f858040 | 526 | |
13802005 | 527 | if (fast) { |
4c147bcf AB |
528 | count = min_t(size_t, dd->total, sg_dma_len(dd->in_sg)); |
529 | count = min_t(size_t, count, sg_dma_len(dd->out_sg)); | |
13802005 | 530 | |
13802005 NR |
531 | err = dma_map_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE); |
532 | if (!err) { | |
533 | dev_err(dd->dev, "dma_map_sg() error\n"); | |
534 | return -EINVAL; | |
535 | } | |
536 | ||
537 | err = dma_map_sg(dd->dev, dd->out_sg, 1, | |
538 | DMA_FROM_DEVICE); | |
539 | if (!err) { | |
540 | dev_err(dd->dev, "dma_map_sg() error\n"); | |
541 | dma_unmap_sg(dd->dev, dd->in_sg, 1, | |
542 | DMA_TO_DEVICE); | |
543 | return -EINVAL; | |
544 | } | |
545 | ||
546 | addr_in = sg_dma_address(dd->in_sg); | |
547 | addr_out = sg_dma_address(dd->out_sg); | |
548 | ||
549 | dd->flags |= TDES_FLAGS_FAST; | |
550 | ||
551 | } else { | |
552 | /* use cache buffers */ | |
553 | count = atmel_tdes_sg_copy(&dd->in_sg, &dd->in_offset, | |
554 | dd->buf_in, dd->buflen, dd->total, 0); | |
555 | ||
556 | addr_in = dd->dma_addr_in; | |
557 | addr_out = dd->dma_addr_out; | |
558 | ||
559 | dd->flags &= ~TDES_FLAGS_FAST; | |
13802005 NR |
560 | } |
561 | ||
562 | dd->total -= count; | |
563 | ||
1f858040 NR |
564 | if (dd->caps.has_dma) |
565 | err = atmel_tdes_crypt_dma(tfm, addr_in, addr_out, count); | |
566 | else | |
567 | err = atmel_tdes_crypt_pdc(tfm, addr_in, addr_out, count); | |
568 | ||
569 | if (err && (dd->flags & TDES_FLAGS_FAST)) { | |
13802005 NR |
570 | dma_unmap_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE); |
571 | dma_unmap_sg(dd->dev, dd->out_sg, 1, DMA_TO_DEVICE); | |
572 | } | |
573 | ||
574 | return err; | |
575 | } | |
576 | ||
13802005 NR |
577 | static void atmel_tdes_finish_req(struct atmel_tdes_dev *dd, int err) |
578 | { | |
579 | struct ablkcipher_request *req = dd->req; | |
580 | ||
581 | clk_disable_unprepare(dd->iclk); | |
582 | ||
583 | dd->flags &= ~TDES_FLAGS_BUSY; | |
584 | ||
585 | req->base.complete(&req->base, err); | |
586 | } | |
587 | ||
588 | static int atmel_tdes_handle_queue(struct atmel_tdes_dev *dd, | |
589 | struct ablkcipher_request *req) | |
590 | { | |
591 | struct crypto_async_request *async_req, *backlog; | |
592 | struct atmel_tdes_ctx *ctx; | |
593 | struct atmel_tdes_reqctx *rctx; | |
594 | unsigned long flags; | |
595 | int err, ret = 0; | |
596 | ||
597 | spin_lock_irqsave(&dd->lock, flags); | |
598 | if (req) | |
599 | ret = ablkcipher_enqueue_request(&dd->queue, req); | |
600 | if (dd->flags & TDES_FLAGS_BUSY) { | |
601 | spin_unlock_irqrestore(&dd->lock, flags); | |
602 | return ret; | |
603 | } | |
604 | backlog = crypto_get_backlog(&dd->queue); | |
605 | async_req = crypto_dequeue_request(&dd->queue); | |
606 | if (async_req) | |
607 | dd->flags |= TDES_FLAGS_BUSY; | |
608 | spin_unlock_irqrestore(&dd->lock, flags); | |
609 | ||
610 | if (!async_req) | |
611 | return ret; | |
612 | ||
613 | if (backlog) | |
614 | backlog->complete(backlog, -EINPROGRESS); | |
615 | ||
616 | req = ablkcipher_request_cast(async_req); | |
617 | ||
618 | /* assign new request to device */ | |
619 | dd->req = req; | |
620 | dd->total = req->nbytes; | |
621 | dd->in_offset = 0; | |
622 | dd->in_sg = req->src; | |
623 | dd->out_offset = 0; | |
624 | dd->out_sg = req->dst; | |
625 | ||
626 | rctx = ablkcipher_request_ctx(req); | |
627 | ctx = crypto_ablkcipher_ctx(crypto_ablkcipher_reqtfm(req)); | |
628 | rctx->mode &= TDES_FLAGS_MODE_MASK; | |
629 | dd->flags = (dd->flags & ~TDES_FLAGS_MODE_MASK) | rctx->mode; | |
630 | dd->ctx = ctx; | |
631 | ctx->dd = dd; | |
632 | ||
633 | err = atmel_tdes_write_ctrl(dd); | |
634 | if (!err) | |
1f858040 | 635 | err = atmel_tdes_crypt_start(dd); |
13802005 NR |
636 | if (err) { |
637 | /* des_task will not finish it, so do it here */ | |
638 | atmel_tdes_finish_req(dd, err); | |
639 | tasklet_schedule(&dd->queue_task); | |
640 | } | |
641 | ||
642 | return ret; | |
643 | } | |
644 | ||
1f858040 NR |
645 | static int atmel_tdes_crypt_dma_stop(struct atmel_tdes_dev *dd) |
646 | { | |
647 | int err = -EINVAL; | |
648 | size_t count; | |
649 | ||
650 | if (dd->flags & TDES_FLAGS_DMA) { | |
651 | err = 0; | |
652 | if (dd->flags & TDES_FLAGS_FAST) { | |
653 | dma_unmap_sg(dd->dev, dd->out_sg, 1, DMA_FROM_DEVICE); | |
654 | dma_unmap_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE); | |
655 | } else { | |
656 | dma_sync_single_for_device(dd->dev, dd->dma_addr_out, | |
657 | dd->dma_size, DMA_FROM_DEVICE); | |
658 | ||
659 | /* copy data */ | |
660 | count = atmel_tdes_sg_copy(&dd->out_sg, &dd->out_offset, | |
661 | dd->buf_out, dd->buflen, dd->dma_size, 1); | |
662 | if (count != dd->dma_size) { | |
663 | err = -EINVAL; | |
4c147bcf | 664 | pr_err("not all data converted: %zu\n", count); |
1f858040 NR |
665 | } |
666 | } | |
667 | } | |
668 | return err; | |
669 | } | |
13802005 NR |
670 | |
671 | static int atmel_tdes_crypt(struct ablkcipher_request *req, unsigned long mode) | |
672 | { | |
673 | struct atmel_tdes_ctx *ctx = crypto_ablkcipher_ctx( | |
674 | crypto_ablkcipher_reqtfm(req)); | |
675 | struct atmel_tdes_reqctx *rctx = ablkcipher_request_ctx(req); | |
13802005 NR |
676 | |
677 | if (mode & TDES_FLAGS_CFB8) { | |
678 | if (!IS_ALIGNED(req->nbytes, CFB8_BLOCK_SIZE)) { | |
679 | pr_err("request size is not exact amount of CFB8 blocks\n"); | |
680 | return -EINVAL; | |
681 | } | |
1f858040 | 682 | ctx->block_size = CFB8_BLOCK_SIZE; |
13802005 NR |
683 | } else if (mode & TDES_FLAGS_CFB16) { |
684 | if (!IS_ALIGNED(req->nbytes, CFB16_BLOCK_SIZE)) { | |
685 | pr_err("request size is not exact amount of CFB16 blocks\n"); | |
686 | return -EINVAL; | |
687 | } | |
1f858040 | 688 | ctx->block_size = CFB16_BLOCK_SIZE; |
13802005 NR |
689 | } else if (mode & TDES_FLAGS_CFB32) { |
690 | if (!IS_ALIGNED(req->nbytes, CFB32_BLOCK_SIZE)) { | |
691 | pr_err("request size is not exact amount of CFB32 blocks\n"); | |
692 | return -EINVAL; | |
693 | } | |
1f858040 NR |
694 | ctx->block_size = CFB32_BLOCK_SIZE; |
695 | } else { | |
696 | if (!IS_ALIGNED(req->nbytes, DES_BLOCK_SIZE)) { | |
697 | pr_err("request size is not exact amount of DES blocks\n"); | |
698 | return -EINVAL; | |
699 | } | |
700 | ctx->block_size = DES_BLOCK_SIZE; | |
13802005 NR |
701 | } |
702 | ||
1f858040 NR |
703 | rctx->mode = mode; |
704 | ||
705 | return atmel_tdes_handle_queue(ctx->dd, req); | |
706 | } | |
707 | ||
708 | static bool atmel_tdes_filter(struct dma_chan *chan, void *slave) | |
709 | { | |
710 | struct at_dma_slave *sl = slave; | |
711 | ||
712 | if (sl && sl->dma_dev == chan->device->dev) { | |
713 | chan->private = sl; | |
714 | return true; | |
715 | } else { | |
716 | return false; | |
717 | } | |
718 | } | |
719 | ||
720 | static int atmel_tdes_dma_init(struct atmel_tdes_dev *dd, | |
721 | struct crypto_platform_data *pdata) | |
722 | { | |
84c8976b NF |
723 | dma_cap_mask_t mask; |
724 | ||
725 | dma_cap_zero(mask); | |
726 | dma_cap_set(DMA_SLAVE, mask); | |
727 | ||
728 | /* Try to grab 2 DMA channels */ | |
729 | dd->dma_lch_in.chan = dma_request_slave_channel_compat(mask, | |
730 | atmel_tdes_filter, &pdata->dma_slave->rxdata, dd->dev, "tx"); | |
731 | if (!dd->dma_lch_in.chan) | |
732 | goto err_dma_in; | |
733 | ||
734 | dd->dma_lch_in.dma_conf.direction = DMA_MEM_TO_DEV; | |
735 | dd->dma_lch_in.dma_conf.dst_addr = dd->phys_base + | |
736 | TDES_IDATA1R; | |
737 | dd->dma_lch_in.dma_conf.src_maxburst = 1; | |
738 | dd->dma_lch_in.dma_conf.src_addr_width = | |
739 | DMA_SLAVE_BUSWIDTH_4_BYTES; | |
740 | dd->dma_lch_in.dma_conf.dst_maxburst = 1; | |
741 | dd->dma_lch_in.dma_conf.dst_addr_width = | |
742 | DMA_SLAVE_BUSWIDTH_4_BYTES; | |
743 | dd->dma_lch_in.dma_conf.device_fc = false; | |
744 | ||
745 | dd->dma_lch_out.chan = dma_request_slave_channel_compat(mask, | |
746 | atmel_tdes_filter, &pdata->dma_slave->txdata, dd->dev, "rx"); | |
747 | if (!dd->dma_lch_out.chan) | |
748 | goto err_dma_out; | |
749 | ||
750 | dd->dma_lch_out.dma_conf.direction = DMA_DEV_TO_MEM; | |
751 | dd->dma_lch_out.dma_conf.src_addr = dd->phys_base + | |
752 | TDES_ODATA1R; | |
753 | dd->dma_lch_out.dma_conf.src_maxburst = 1; | |
754 | dd->dma_lch_out.dma_conf.src_addr_width = | |
755 | DMA_SLAVE_BUSWIDTH_4_BYTES; | |
756 | dd->dma_lch_out.dma_conf.dst_maxburst = 1; | |
757 | dd->dma_lch_out.dma_conf.dst_addr_width = | |
758 | DMA_SLAVE_BUSWIDTH_4_BYTES; | |
759 | dd->dma_lch_out.dma_conf.device_fc = false; | |
1f858040 | 760 | |
84c8976b | 761 | return 0; |
13802005 | 762 | |
1f858040 NR |
763 | err_dma_out: |
764 | dma_release_channel(dd->dma_lch_in.chan); | |
765 | err_dma_in: | |
84c8976b | 766 | dev_warn(dd->dev, "no DMA channel available\n"); |
3c88761e | 767 | return -ENODEV; |
1f858040 | 768 | } |
13802005 | 769 | |
1f858040 NR |
770 | static void atmel_tdes_dma_cleanup(struct atmel_tdes_dev *dd) |
771 | { | |
772 | dma_release_channel(dd->dma_lch_in.chan); | |
773 | dma_release_channel(dd->dma_lch_out.chan); | |
13802005 NR |
774 | } |
775 | ||
776 | static int atmel_des_setkey(struct crypto_ablkcipher *tfm, const u8 *key, | |
777 | unsigned int keylen) | |
778 | { | |
779 | u32 tmp[DES_EXPKEY_WORDS]; | |
780 | int err; | |
781 | struct crypto_tfm *ctfm = crypto_ablkcipher_tfm(tfm); | |
782 | ||
783 | struct atmel_tdes_ctx *ctx = crypto_ablkcipher_ctx(tfm); | |
784 | ||
785 | if (keylen != DES_KEY_SIZE) { | |
786 | crypto_ablkcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN); | |
787 | return -EINVAL; | |
788 | } | |
789 | ||
790 | err = des_ekey(tmp, key); | |
791 | if (err == 0 && (ctfm->crt_flags & CRYPTO_TFM_REQ_WEAK_KEY)) { | |
792 | ctfm->crt_flags |= CRYPTO_TFM_RES_WEAK_KEY; | |
793 | return -EINVAL; | |
794 | } | |
795 | ||
796 | memcpy(ctx->key, key, keylen); | |
797 | ctx->keylen = keylen; | |
798 | ||
799 | return 0; | |
800 | } | |
801 | ||
802 | static int atmel_tdes_setkey(struct crypto_ablkcipher *tfm, const u8 *key, | |
803 | unsigned int keylen) | |
804 | { | |
805 | struct atmel_tdes_ctx *ctx = crypto_ablkcipher_ctx(tfm); | |
806 | const char *alg_name; | |
807 | ||
808 | alg_name = crypto_tfm_alg_name(crypto_ablkcipher_tfm(tfm)); | |
809 | ||
810 | /* | |
811 | * HW bug in cfb 3-keys mode. | |
812 | */ | |
1f858040 NR |
813 | if (!ctx->dd->caps.has_cfb_3keys && strstr(alg_name, "cfb") |
814 | && (keylen != 2*DES_KEY_SIZE)) { | |
13802005 NR |
815 | crypto_ablkcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN); |
816 | return -EINVAL; | |
817 | } else if ((keylen != 2*DES_KEY_SIZE) && (keylen != 3*DES_KEY_SIZE)) { | |
818 | crypto_ablkcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN); | |
819 | return -EINVAL; | |
820 | } | |
821 | ||
822 | memcpy(ctx->key, key, keylen); | |
823 | ctx->keylen = keylen; | |
824 | ||
825 | return 0; | |
826 | } | |
827 | ||
828 | static int atmel_tdes_ecb_encrypt(struct ablkcipher_request *req) | |
829 | { | |
830 | return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT); | |
831 | } | |
832 | ||
833 | static int atmel_tdes_ecb_decrypt(struct ablkcipher_request *req) | |
834 | { | |
835 | return atmel_tdes_crypt(req, 0); | |
836 | } | |
837 | ||
838 | static int atmel_tdes_cbc_encrypt(struct ablkcipher_request *req) | |
839 | { | |
840 | return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT | TDES_FLAGS_CBC); | |
841 | } | |
842 | ||
843 | static int atmel_tdes_cbc_decrypt(struct ablkcipher_request *req) | |
844 | { | |
845 | return atmel_tdes_crypt(req, TDES_FLAGS_CBC); | |
846 | } | |
847 | static int atmel_tdes_cfb_encrypt(struct ablkcipher_request *req) | |
848 | { | |
849 | return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT | TDES_FLAGS_CFB); | |
850 | } | |
851 | ||
852 | static int atmel_tdes_cfb_decrypt(struct ablkcipher_request *req) | |
853 | { | |
854 | return atmel_tdes_crypt(req, TDES_FLAGS_CFB); | |
855 | } | |
856 | ||
857 | static int atmel_tdes_cfb8_encrypt(struct ablkcipher_request *req) | |
858 | { | |
859 | return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT | TDES_FLAGS_CFB | | |
860 | TDES_FLAGS_CFB8); | |
861 | } | |
862 | ||
863 | static int atmel_tdes_cfb8_decrypt(struct ablkcipher_request *req) | |
864 | { | |
865 | return atmel_tdes_crypt(req, TDES_FLAGS_CFB | TDES_FLAGS_CFB8); | |
866 | } | |
867 | ||
868 | static int atmel_tdes_cfb16_encrypt(struct ablkcipher_request *req) | |
869 | { | |
870 | return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT | TDES_FLAGS_CFB | | |
871 | TDES_FLAGS_CFB16); | |
872 | } | |
873 | ||
874 | static int atmel_tdes_cfb16_decrypt(struct ablkcipher_request *req) | |
875 | { | |
876 | return atmel_tdes_crypt(req, TDES_FLAGS_CFB | TDES_FLAGS_CFB16); | |
877 | } | |
878 | ||
879 | static int atmel_tdes_cfb32_encrypt(struct ablkcipher_request *req) | |
880 | { | |
881 | return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT | TDES_FLAGS_CFB | | |
882 | TDES_FLAGS_CFB32); | |
883 | } | |
884 | ||
885 | static int atmel_tdes_cfb32_decrypt(struct ablkcipher_request *req) | |
886 | { | |
887 | return atmel_tdes_crypt(req, TDES_FLAGS_CFB | TDES_FLAGS_CFB32); | |
888 | } | |
889 | ||
890 | static int atmel_tdes_ofb_encrypt(struct ablkcipher_request *req) | |
891 | { | |
892 | return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT | TDES_FLAGS_OFB); | |
893 | } | |
894 | ||
895 | static int atmel_tdes_ofb_decrypt(struct ablkcipher_request *req) | |
896 | { | |
897 | return atmel_tdes_crypt(req, TDES_FLAGS_OFB); | |
898 | } | |
899 | ||
900 | static int atmel_tdes_cra_init(struct crypto_tfm *tfm) | |
901 | { | |
1f858040 NR |
902 | struct atmel_tdes_ctx *ctx = crypto_tfm_ctx(tfm); |
903 | struct atmel_tdes_dev *dd; | |
904 | ||
13802005 NR |
905 | tfm->crt_ablkcipher.reqsize = sizeof(struct atmel_tdes_reqctx); |
906 | ||
1f858040 NR |
907 | dd = atmel_tdes_find_dev(ctx); |
908 | if (!dd) | |
909 | return -ENODEV; | |
910 | ||
13802005 NR |
911 | return 0; |
912 | } | |
913 | ||
13802005 NR |
914 | static struct crypto_alg tdes_algs[] = { |
915 | { | |
916 | .cra_name = "ecb(des)", | |
917 | .cra_driver_name = "atmel-ecb-des", | |
918 | .cra_priority = 100, | |
919 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
920 | .cra_blocksize = DES_BLOCK_SIZE, | |
921 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
1f858040 | 922 | .cra_alignmask = 0x7, |
13802005 NR |
923 | .cra_type = &crypto_ablkcipher_type, |
924 | .cra_module = THIS_MODULE, | |
925 | .cra_init = atmel_tdes_cra_init, | |
13802005 NR |
926 | .cra_u.ablkcipher = { |
927 | .min_keysize = DES_KEY_SIZE, | |
928 | .max_keysize = DES_KEY_SIZE, | |
929 | .setkey = atmel_des_setkey, | |
930 | .encrypt = atmel_tdes_ecb_encrypt, | |
931 | .decrypt = atmel_tdes_ecb_decrypt, | |
932 | } | |
933 | }, | |
934 | { | |
935 | .cra_name = "cbc(des)", | |
936 | .cra_driver_name = "atmel-cbc-des", | |
937 | .cra_priority = 100, | |
938 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
939 | .cra_blocksize = DES_BLOCK_SIZE, | |
940 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
1f858040 | 941 | .cra_alignmask = 0x7, |
13802005 NR |
942 | .cra_type = &crypto_ablkcipher_type, |
943 | .cra_module = THIS_MODULE, | |
944 | .cra_init = atmel_tdes_cra_init, | |
13802005 NR |
945 | .cra_u.ablkcipher = { |
946 | .min_keysize = DES_KEY_SIZE, | |
947 | .max_keysize = DES_KEY_SIZE, | |
948 | .ivsize = DES_BLOCK_SIZE, | |
949 | .setkey = atmel_des_setkey, | |
950 | .encrypt = atmel_tdes_cbc_encrypt, | |
951 | .decrypt = atmel_tdes_cbc_decrypt, | |
952 | } | |
953 | }, | |
954 | { | |
955 | .cra_name = "cfb(des)", | |
956 | .cra_driver_name = "atmel-cfb-des", | |
957 | .cra_priority = 100, | |
958 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
959 | .cra_blocksize = DES_BLOCK_SIZE, | |
960 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
1f858040 | 961 | .cra_alignmask = 0x7, |
13802005 NR |
962 | .cra_type = &crypto_ablkcipher_type, |
963 | .cra_module = THIS_MODULE, | |
964 | .cra_init = atmel_tdes_cra_init, | |
13802005 NR |
965 | .cra_u.ablkcipher = { |
966 | .min_keysize = DES_KEY_SIZE, | |
967 | .max_keysize = DES_KEY_SIZE, | |
968 | .ivsize = DES_BLOCK_SIZE, | |
969 | .setkey = atmel_des_setkey, | |
970 | .encrypt = atmel_tdes_cfb_encrypt, | |
971 | .decrypt = atmel_tdes_cfb_decrypt, | |
972 | } | |
973 | }, | |
974 | { | |
975 | .cra_name = "cfb8(des)", | |
976 | .cra_driver_name = "atmel-cfb8-des", | |
977 | .cra_priority = 100, | |
978 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
979 | .cra_blocksize = CFB8_BLOCK_SIZE, | |
980 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
981 | .cra_alignmask = 0, | |
982 | .cra_type = &crypto_ablkcipher_type, | |
983 | .cra_module = THIS_MODULE, | |
984 | .cra_init = atmel_tdes_cra_init, | |
13802005 NR |
985 | .cra_u.ablkcipher = { |
986 | .min_keysize = DES_KEY_SIZE, | |
987 | .max_keysize = DES_KEY_SIZE, | |
988 | .ivsize = DES_BLOCK_SIZE, | |
989 | .setkey = atmel_des_setkey, | |
990 | .encrypt = atmel_tdes_cfb8_encrypt, | |
991 | .decrypt = atmel_tdes_cfb8_decrypt, | |
992 | } | |
993 | }, | |
994 | { | |
995 | .cra_name = "cfb16(des)", | |
996 | .cra_driver_name = "atmel-cfb16-des", | |
997 | .cra_priority = 100, | |
998 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
999 | .cra_blocksize = CFB16_BLOCK_SIZE, | |
1000 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
1f858040 | 1001 | .cra_alignmask = 0x1, |
13802005 NR |
1002 | .cra_type = &crypto_ablkcipher_type, |
1003 | .cra_module = THIS_MODULE, | |
1004 | .cra_init = atmel_tdes_cra_init, | |
13802005 NR |
1005 | .cra_u.ablkcipher = { |
1006 | .min_keysize = DES_KEY_SIZE, | |
1007 | .max_keysize = DES_KEY_SIZE, | |
1008 | .ivsize = DES_BLOCK_SIZE, | |
1009 | .setkey = atmel_des_setkey, | |
1010 | .encrypt = atmel_tdes_cfb16_encrypt, | |
1011 | .decrypt = atmel_tdes_cfb16_decrypt, | |
1012 | } | |
1013 | }, | |
1014 | { | |
1015 | .cra_name = "cfb32(des)", | |
1016 | .cra_driver_name = "atmel-cfb32-des", | |
1017 | .cra_priority = 100, | |
1018 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
1019 | .cra_blocksize = CFB32_BLOCK_SIZE, | |
1020 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
1f858040 | 1021 | .cra_alignmask = 0x3, |
13802005 NR |
1022 | .cra_type = &crypto_ablkcipher_type, |
1023 | .cra_module = THIS_MODULE, | |
1024 | .cra_init = atmel_tdes_cra_init, | |
13802005 NR |
1025 | .cra_u.ablkcipher = { |
1026 | .min_keysize = DES_KEY_SIZE, | |
1027 | .max_keysize = DES_KEY_SIZE, | |
1028 | .ivsize = DES_BLOCK_SIZE, | |
1029 | .setkey = atmel_des_setkey, | |
1030 | .encrypt = atmel_tdes_cfb32_encrypt, | |
1031 | .decrypt = atmel_tdes_cfb32_decrypt, | |
1032 | } | |
1033 | }, | |
1034 | { | |
1035 | .cra_name = "ofb(des)", | |
1036 | .cra_driver_name = "atmel-ofb-des", | |
1037 | .cra_priority = 100, | |
1038 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
1039 | .cra_blocksize = DES_BLOCK_SIZE, | |
1040 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
1f858040 | 1041 | .cra_alignmask = 0x7, |
13802005 NR |
1042 | .cra_type = &crypto_ablkcipher_type, |
1043 | .cra_module = THIS_MODULE, | |
1044 | .cra_init = atmel_tdes_cra_init, | |
13802005 NR |
1045 | .cra_u.ablkcipher = { |
1046 | .min_keysize = DES_KEY_SIZE, | |
1047 | .max_keysize = DES_KEY_SIZE, | |
1048 | .ivsize = DES_BLOCK_SIZE, | |
1049 | .setkey = atmel_des_setkey, | |
1050 | .encrypt = atmel_tdes_ofb_encrypt, | |
1051 | .decrypt = atmel_tdes_ofb_decrypt, | |
1052 | } | |
1053 | }, | |
1054 | { | |
1055 | .cra_name = "ecb(des3_ede)", | |
1056 | .cra_driver_name = "atmel-ecb-tdes", | |
1057 | .cra_priority = 100, | |
1058 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
1059 | .cra_blocksize = DES_BLOCK_SIZE, | |
1060 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
1f858040 | 1061 | .cra_alignmask = 0x7, |
13802005 NR |
1062 | .cra_type = &crypto_ablkcipher_type, |
1063 | .cra_module = THIS_MODULE, | |
1064 | .cra_init = atmel_tdes_cra_init, | |
13802005 NR |
1065 | .cra_u.ablkcipher = { |
1066 | .min_keysize = 2 * DES_KEY_SIZE, | |
1067 | .max_keysize = 3 * DES_KEY_SIZE, | |
1068 | .setkey = atmel_tdes_setkey, | |
1069 | .encrypt = atmel_tdes_ecb_encrypt, | |
1070 | .decrypt = atmel_tdes_ecb_decrypt, | |
1071 | } | |
1072 | }, | |
1073 | { | |
1074 | .cra_name = "cbc(des3_ede)", | |
1075 | .cra_driver_name = "atmel-cbc-tdes", | |
1076 | .cra_priority = 100, | |
1077 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
1078 | .cra_blocksize = DES_BLOCK_SIZE, | |
1079 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
1f858040 | 1080 | .cra_alignmask = 0x7, |
13802005 NR |
1081 | .cra_type = &crypto_ablkcipher_type, |
1082 | .cra_module = THIS_MODULE, | |
1083 | .cra_init = atmel_tdes_cra_init, | |
13802005 NR |
1084 | .cra_u.ablkcipher = { |
1085 | .min_keysize = 2*DES_KEY_SIZE, | |
1086 | .max_keysize = 3*DES_KEY_SIZE, | |
1087 | .ivsize = DES_BLOCK_SIZE, | |
1088 | .setkey = atmel_tdes_setkey, | |
1089 | .encrypt = atmel_tdes_cbc_encrypt, | |
1090 | .decrypt = atmel_tdes_cbc_decrypt, | |
1091 | } | |
1092 | }, | |
1093 | { | |
1094 | .cra_name = "cfb(des3_ede)", | |
1095 | .cra_driver_name = "atmel-cfb-tdes", | |
1096 | .cra_priority = 100, | |
1097 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
1098 | .cra_blocksize = DES_BLOCK_SIZE, | |
1099 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
1f858040 | 1100 | .cra_alignmask = 0x7, |
13802005 NR |
1101 | .cra_type = &crypto_ablkcipher_type, |
1102 | .cra_module = THIS_MODULE, | |
1103 | .cra_init = atmel_tdes_cra_init, | |
13802005 NR |
1104 | .cra_u.ablkcipher = { |
1105 | .min_keysize = 2*DES_KEY_SIZE, | |
1106 | .max_keysize = 2*DES_KEY_SIZE, | |
1107 | .ivsize = DES_BLOCK_SIZE, | |
1108 | .setkey = atmel_tdes_setkey, | |
1109 | .encrypt = atmel_tdes_cfb_encrypt, | |
1110 | .decrypt = atmel_tdes_cfb_decrypt, | |
1111 | } | |
1112 | }, | |
1113 | { | |
1114 | .cra_name = "cfb8(des3_ede)", | |
1115 | .cra_driver_name = "atmel-cfb8-tdes", | |
1116 | .cra_priority = 100, | |
1117 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
1118 | .cra_blocksize = CFB8_BLOCK_SIZE, | |
1119 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
1120 | .cra_alignmask = 0, | |
1121 | .cra_type = &crypto_ablkcipher_type, | |
1122 | .cra_module = THIS_MODULE, | |
1123 | .cra_init = atmel_tdes_cra_init, | |
13802005 NR |
1124 | .cra_u.ablkcipher = { |
1125 | .min_keysize = 2*DES_KEY_SIZE, | |
1126 | .max_keysize = 2*DES_KEY_SIZE, | |
1127 | .ivsize = DES_BLOCK_SIZE, | |
1128 | .setkey = atmel_tdes_setkey, | |
1129 | .encrypt = atmel_tdes_cfb8_encrypt, | |
1130 | .decrypt = atmel_tdes_cfb8_decrypt, | |
1131 | } | |
1132 | }, | |
1133 | { | |
1134 | .cra_name = "cfb16(des3_ede)", | |
1135 | .cra_driver_name = "atmel-cfb16-tdes", | |
1136 | .cra_priority = 100, | |
1137 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
1138 | .cra_blocksize = CFB16_BLOCK_SIZE, | |
1139 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
1f858040 | 1140 | .cra_alignmask = 0x1, |
13802005 NR |
1141 | .cra_type = &crypto_ablkcipher_type, |
1142 | .cra_module = THIS_MODULE, | |
1143 | .cra_init = atmel_tdes_cra_init, | |
13802005 NR |
1144 | .cra_u.ablkcipher = { |
1145 | .min_keysize = 2*DES_KEY_SIZE, | |
1146 | .max_keysize = 2*DES_KEY_SIZE, | |
1147 | .ivsize = DES_BLOCK_SIZE, | |
1148 | .setkey = atmel_tdes_setkey, | |
1149 | .encrypt = atmel_tdes_cfb16_encrypt, | |
1150 | .decrypt = atmel_tdes_cfb16_decrypt, | |
1151 | } | |
1152 | }, | |
1153 | { | |
1154 | .cra_name = "cfb32(des3_ede)", | |
1155 | .cra_driver_name = "atmel-cfb32-tdes", | |
1156 | .cra_priority = 100, | |
1157 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
1158 | .cra_blocksize = CFB32_BLOCK_SIZE, | |
1159 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
1f858040 | 1160 | .cra_alignmask = 0x3, |
13802005 NR |
1161 | .cra_type = &crypto_ablkcipher_type, |
1162 | .cra_module = THIS_MODULE, | |
1163 | .cra_init = atmel_tdes_cra_init, | |
13802005 NR |
1164 | .cra_u.ablkcipher = { |
1165 | .min_keysize = 2*DES_KEY_SIZE, | |
1166 | .max_keysize = 2*DES_KEY_SIZE, | |
1167 | .ivsize = DES_BLOCK_SIZE, | |
1168 | .setkey = atmel_tdes_setkey, | |
1169 | .encrypt = atmel_tdes_cfb32_encrypt, | |
1170 | .decrypt = atmel_tdes_cfb32_decrypt, | |
1171 | } | |
1172 | }, | |
1173 | { | |
1174 | .cra_name = "ofb(des3_ede)", | |
1175 | .cra_driver_name = "atmel-ofb-tdes", | |
1176 | .cra_priority = 100, | |
1177 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
1178 | .cra_blocksize = DES_BLOCK_SIZE, | |
1179 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
1f858040 | 1180 | .cra_alignmask = 0x7, |
13802005 NR |
1181 | .cra_type = &crypto_ablkcipher_type, |
1182 | .cra_module = THIS_MODULE, | |
1183 | .cra_init = atmel_tdes_cra_init, | |
13802005 NR |
1184 | .cra_u.ablkcipher = { |
1185 | .min_keysize = 2*DES_KEY_SIZE, | |
1186 | .max_keysize = 3*DES_KEY_SIZE, | |
1187 | .ivsize = DES_BLOCK_SIZE, | |
1188 | .setkey = atmel_tdes_setkey, | |
1189 | .encrypt = atmel_tdes_ofb_encrypt, | |
1190 | .decrypt = atmel_tdes_ofb_decrypt, | |
1191 | } | |
1192 | }, | |
1193 | }; | |
1194 | ||
1195 | static void atmel_tdes_queue_task(unsigned long data) | |
1196 | { | |
1197 | struct atmel_tdes_dev *dd = (struct atmel_tdes_dev *)data; | |
1198 | ||
1199 | atmel_tdes_handle_queue(dd, NULL); | |
1200 | } | |
1201 | ||
1202 | static void atmel_tdes_done_task(unsigned long data) | |
1203 | { | |
1204 | struct atmel_tdes_dev *dd = (struct atmel_tdes_dev *) data; | |
1205 | int err; | |
1206 | ||
1f858040 NR |
1207 | if (!(dd->flags & TDES_FLAGS_DMA)) |
1208 | err = atmel_tdes_crypt_pdc_stop(dd); | |
1209 | else | |
1210 | err = atmel_tdes_crypt_dma_stop(dd); | |
13802005 NR |
1211 | |
1212 | err = dd->err ? : err; | |
1213 | ||
1214 | if (dd->total && !err) { | |
1f858040 NR |
1215 | if (dd->flags & TDES_FLAGS_FAST) { |
1216 | dd->in_sg = sg_next(dd->in_sg); | |
1217 | dd->out_sg = sg_next(dd->out_sg); | |
1218 | if (!dd->in_sg || !dd->out_sg) | |
1219 | err = -EINVAL; | |
1220 | } | |
13802005 | 1221 | if (!err) |
1f858040 NR |
1222 | err = atmel_tdes_crypt_start(dd); |
1223 | if (!err) | |
1224 | return; /* DMA started. Not fininishing. */ | |
13802005 NR |
1225 | } |
1226 | ||
1227 | atmel_tdes_finish_req(dd, err); | |
1228 | atmel_tdes_handle_queue(dd, NULL); | |
1229 | } | |
1230 | ||
1231 | static irqreturn_t atmel_tdes_irq(int irq, void *dev_id) | |
1232 | { | |
1233 | struct atmel_tdes_dev *tdes_dd = dev_id; | |
1234 | u32 reg; | |
1235 | ||
1236 | reg = atmel_tdes_read(tdes_dd, TDES_ISR); | |
1237 | if (reg & atmel_tdes_read(tdes_dd, TDES_IMR)) { | |
1238 | atmel_tdes_write(tdes_dd, TDES_IDR, reg); | |
1239 | if (TDES_FLAGS_BUSY & tdes_dd->flags) | |
1240 | tasklet_schedule(&tdes_dd->done_task); | |
1241 | else | |
1242 | dev_warn(tdes_dd->dev, "TDES interrupt when no active requests.\n"); | |
1243 | return IRQ_HANDLED; | |
1244 | } | |
1245 | ||
1246 | return IRQ_NONE; | |
1247 | } | |
1248 | ||
1249 | static void atmel_tdes_unregister_algs(struct atmel_tdes_dev *dd) | |
1250 | { | |
1251 | int i; | |
1252 | ||
1253 | for (i = 0; i < ARRAY_SIZE(tdes_algs); i++) | |
1254 | crypto_unregister_alg(&tdes_algs[i]); | |
1255 | } | |
1256 | ||
1257 | static int atmel_tdes_register_algs(struct atmel_tdes_dev *dd) | |
1258 | { | |
1259 | int err, i, j; | |
1260 | ||
1261 | for (i = 0; i < ARRAY_SIZE(tdes_algs); i++) { | |
13802005 NR |
1262 | err = crypto_register_alg(&tdes_algs[i]); |
1263 | if (err) | |
1264 | goto err_tdes_algs; | |
1265 | } | |
1266 | ||
1267 | return 0; | |
1268 | ||
1269 | err_tdes_algs: | |
1270 | for (j = 0; j < i; j++) | |
1271 | crypto_unregister_alg(&tdes_algs[j]); | |
1272 | ||
1273 | return err; | |
1274 | } | |
1275 | ||
1f858040 NR |
1276 | static void atmel_tdes_get_cap(struct atmel_tdes_dev *dd) |
1277 | { | |
1278 | ||
1279 | dd->caps.has_dma = 0; | |
1280 | dd->caps.has_cfb_3keys = 0; | |
1281 | ||
1282 | /* keep only major version number */ | |
1283 | switch (dd->hw_version & 0xf00) { | |
1284 | case 0x700: | |
1285 | dd->caps.has_dma = 1; | |
1286 | dd->caps.has_cfb_3keys = 1; | |
1287 | break; | |
1288 | case 0x600: | |
1289 | break; | |
1290 | default: | |
1291 | dev_warn(dd->dev, | |
1292 | "Unmanaged tdes version, set minimum capabilities\n"); | |
1293 | break; | |
1294 | } | |
1295 | } | |
1296 | ||
84c8976b NF |
1297 | #if defined(CONFIG_OF) |
1298 | static const struct of_device_id atmel_tdes_dt_ids[] = { | |
1299 | { .compatible = "atmel,at91sam9g46-tdes" }, | |
1300 | { /* sentinel */ } | |
1301 | }; | |
1302 | MODULE_DEVICE_TABLE(of, atmel_tdes_dt_ids); | |
1303 | ||
1304 | static struct crypto_platform_data *atmel_tdes_of_init(struct platform_device *pdev) | |
1305 | { | |
1306 | struct device_node *np = pdev->dev.of_node; | |
1307 | struct crypto_platform_data *pdata; | |
1308 | ||
1309 | if (!np) { | |
1310 | dev_err(&pdev->dev, "device node not found\n"); | |
1311 | return ERR_PTR(-EINVAL); | |
1312 | } | |
1313 | ||
1314 | pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); | |
02684839 | 1315 | if (!pdata) |
84c8976b | 1316 | return ERR_PTR(-ENOMEM); |
84c8976b NF |
1317 | |
1318 | pdata->dma_slave = devm_kzalloc(&pdev->dev, | |
1319 | sizeof(*(pdata->dma_slave)), | |
1320 | GFP_KERNEL); | |
02684839 | 1321 | if (!pdata->dma_slave) |
84c8976b | 1322 | return ERR_PTR(-ENOMEM); |
84c8976b NF |
1323 | |
1324 | return pdata; | |
1325 | } | |
1326 | #else /* CONFIG_OF */ | |
1327 | static inline struct crypto_platform_data *atmel_tdes_of_init(struct platform_device *pdev) | |
1328 | { | |
1329 | return ERR_PTR(-EINVAL); | |
1330 | } | |
1331 | #endif | |
1332 | ||
49cfe4db | 1333 | static int atmel_tdes_probe(struct platform_device *pdev) |
13802005 NR |
1334 | { |
1335 | struct atmel_tdes_dev *tdes_dd; | |
1f858040 | 1336 | struct crypto_platform_data *pdata; |
13802005 NR |
1337 | struct device *dev = &pdev->dev; |
1338 | struct resource *tdes_res; | |
13802005 NR |
1339 | int err; |
1340 | ||
c659d07f | 1341 | tdes_dd = devm_kmalloc(&pdev->dev, sizeof(*tdes_dd), GFP_KERNEL); |
13802005 | 1342 | if (tdes_dd == NULL) { |
13802005 NR |
1343 | err = -ENOMEM; |
1344 | goto tdes_dd_err; | |
1345 | } | |
1346 | ||
1347 | tdes_dd->dev = dev; | |
1348 | ||
1349 | platform_set_drvdata(pdev, tdes_dd); | |
1350 | ||
1351 | INIT_LIST_HEAD(&tdes_dd->list); | |
1d1b9163 | 1352 | spin_lock_init(&tdes_dd->lock); |
13802005 NR |
1353 | |
1354 | tasklet_init(&tdes_dd->done_task, atmel_tdes_done_task, | |
1355 | (unsigned long)tdes_dd); | |
1356 | tasklet_init(&tdes_dd->queue_task, atmel_tdes_queue_task, | |
1357 | (unsigned long)tdes_dd); | |
1358 | ||
1359 | crypto_init_queue(&tdes_dd->queue, ATMEL_TDES_QUEUE_LENGTH); | |
1360 | ||
13802005 NR |
1361 | /* Get the base address */ |
1362 | tdes_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1363 | if (!tdes_res) { | |
1364 | dev_err(dev, "no MEM resource info\n"); | |
1365 | err = -ENODEV; | |
1366 | goto res_err; | |
1367 | } | |
1368 | tdes_dd->phys_base = tdes_res->start; | |
13802005 NR |
1369 | |
1370 | /* Get the IRQ */ | |
1371 | tdes_dd->irq = platform_get_irq(pdev, 0); | |
1372 | if (tdes_dd->irq < 0) { | |
1373 | dev_err(dev, "no IRQ resource info\n"); | |
1374 | err = tdes_dd->irq; | |
1375 | goto res_err; | |
1376 | } | |
1377 | ||
b0e8b341 LC |
1378 | err = devm_request_irq(&pdev->dev, tdes_dd->irq, atmel_tdes_irq, |
1379 | IRQF_SHARED, "atmel-tdes", tdes_dd); | |
13802005 NR |
1380 | if (err) { |
1381 | dev_err(dev, "unable to request tdes irq.\n"); | |
b0e8b341 | 1382 | goto res_err; |
13802005 NR |
1383 | } |
1384 | ||
1385 | /* Initializing the clock */ | |
b0e8b341 | 1386 | tdes_dd->iclk = devm_clk_get(&pdev->dev, "tdes_clk"); |
13802005 | 1387 | if (IS_ERR(tdes_dd->iclk)) { |
be208356 | 1388 | dev_err(dev, "clock initialization failed.\n"); |
13802005 | 1389 | err = PTR_ERR(tdes_dd->iclk); |
b0e8b341 | 1390 | goto res_err; |
13802005 NR |
1391 | } |
1392 | ||
b0e8b341 | 1393 | tdes_dd->io_base = devm_ioremap_resource(&pdev->dev, tdes_res); |
9b52d55f | 1394 | if (IS_ERR(tdes_dd->io_base)) { |
13802005 | 1395 | dev_err(dev, "can't ioremap\n"); |
9b52d55f | 1396 | err = PTR_ERR(tdes_dd->io_base); |
b0e8b341 | 1397 | goto res_err; |
13802005 NR |
1398 | } |
1399 | ||
1f858040 NR |
1400 | atmel_tdes_hw_version_init(tdes_dd); |
1401 | ||
1402 | atmel_tdes_get_cap(tdes_dd); | |
1403 | ||
1404 | err = atmel_tdes_buff_init(tdes_dd); | |
13802005 | 1405 | if (err) |
1f858040 NR |
1406 | goto err_tdes_buff; |
1407 | ||
1408 | if (tdes_dd->caps.has_dma) { | |
1409 | pdata = pdev->dev.platform_data; | |
1410 | if (!pdata) { | |
84c8976b NF |
1411 | pdata = atmel_tdes_of_init(pdev); |
1412 | if (IS_ERR(pdata)) { | |
1413 | dev_err(&pdev->dev, "platform data not available\n"); | |
1414 | err = PTR_ERR(pdata); | |
1415 | goto err_pdata; | |
1416 | } | |
1417 | } | |
1418 | if (!pdata->dma_slave) { | |
1f858040 NR |
1419 | err = -ENXIO; |
1420 | goto err_pdata; | |
1421 | } | |
1422 | err = atmel_tdes_dma_init(tdes_dd, pdata); | |
1423 | if (err) | |
1424 | goto err_tdes_dma; | |
84c8976b NF |
1425 | |
1426 | dev_info(dev, "using %s, %s for DMA transfers\n", | |
1427 | dma_chan_name(tdes_dd->dma_lch_in.chan), | |
1428 | dma_chan_name(tdes_dd->dma_lch_out.chan)); | |
1f858040 | 1429 | } |
13802005 NR |
1430 | |
1431 | spin_lock(&atmel_tdes.lock); | |
1432 | list_add_tail(&tdes_dd->list, &atmel_tdes.dev_list); | |
1433 | spin_unlock(&atmel_tdes.lock); | |
1434 | ||
1435 | err = atmel_tdes_register_algs(tdes_dd); | |
1436 | if (err) | |
1437 | goto err_algs; | |
1438 | ||
1439 | dev_info(dev, "Atmel DES/TDES\n"); | |
1440 | ||
1441 | return 0; | |
1442 | ||
1443 | err_algs: | |
1444 | spin_lock(&atmel_tdes.lock); | |
1445 | list_del(&tdes_dd->list); | |
1446 | spin_unlock(&atmel_tdes.lock); | |
1f858040 NR |
1447 | if (tdes_dd->caps.has_dma) |
1448 | atmel_tdes_dma_cleanup(tdes_dd); | |
13802005 | 1449 | err_tdes_dma: |
1f858040 NR |
1450 | err_pdata: |
1451 | atmel_tdes_buff_cleanup(tdes_dd); | |
1452 | err_tdes_buff: | |
13802005 NR |
1453 | res_err: |
1454 | tasklet_kill(&tdes_dd->done_task); | |
1455 | tasklet_kill(&tdes_dd->queue_task); | |
13802005 NR |
1456 | tdes_dd_err: |
1457 | dev_err(dev, "initialization failed.\n"); | |
1458 | ||
1459 | return err; | |
1460 | } | |
1461 | ||
49cfe4db | 1462 | static int atmel_tdes_remove(struct platform_device *pdev) |
13802005 | 1463 | { |
47f1241e | 1464 | struct atmel_tdes_dev *tdes_dd; |
13802005 NR |
1465 | |
1466 | tdes_dd = platform_get_drvdata(pdev); | |
1467 | if (!tdes_dd) | |
1468 | return -ENODEV; | |
1469 | spin_lock(&atmel_tdes.lock); | |
1470 | list_del(&tdes_dd->list); | |
1471 | spin_unlock(&atmel_tdes.lock); | |
1472 | ||
1473 | atmel_tdes_unregister_algs(tdes_dd); | |
1474 | ||
1475 | tasklet_kill(&tdes_dd->done_task); | |
1476 | tasklet_kill(&tdes_dd->queue_task); | |
1477 | ||
1f858040 NR |
1478 | if (tdes_dd->caps.has_dma) |
1479 | atmel_tdes_dma_cleanup(tdes_dd); | |
1480 | ||
1481 | atmel_tdes_buff_cleanup(tdes_dd); | |
13802005 | 1482 | |
13802005 NR |
1483 | return 0; |
1484 | } | |
1485 | ||
1486 | static struct platform_driver atmel_tdes_driver = { | |
1487 | .probe = atmel_tdes_probe, | |
49cfe4db | 1488 | .remove = atmel_tdes_remove, |
13802005 NR |
1489 | .driver = { |
1490 | .name = "atmel_tdes", | |
84c8976b | 1491 | .of_match_table = of_match_ptr(atmel_tdes_dt_ids), |
13802005 NR |
1492 | }, |
1493 | }; | |
1494 | ||
1495 | module_platform_driver(atmel_tdes_driver); | |
1496 | ||
1497 | MODULE_DESCRIPTION("Atmel DES/TDES hw acceleration support."); | |
1498 | MODULE_LICENSE("GPL v2"); | |
1499 | MODULE_AUTHOR("Nicolas Royer - Eukréa Electromatique"); |