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820684cc | 1 | // SPDX-License-Identifier: GPL-2.0 |
13802005 NR |
2 | /* |
3 | * Cryptographic API. | |
4 | * | |
5 | * Support for ATMEL DES/TDES HW acceleration. | |
6 | * | |
7 | * Copyright (c) 2012 Eukréa Electromatique - ATMEL | |
8 | * Author: Nicolas Royer <nicolas@eukrea.com> | |
9 | * | |
13802005 NR |
10 | * Some ideas are from omap-aes.c drivers. |
11 | */ | |
12 | ||
13 | ||
14 | #include <linux/kernel.h> | |
15 | #include <linux/module.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/err.h> | |
18 | #include <linux/clk.h> | |
19 | #include <linux/io.h> | |
20 | #include <linux/hw_random.h> | |
21 | #include <linux/platform_device.h> | |
22 | ||
23 | #include <linux/device.h> | |
13802005 NR |
24 | #include <linux/init.h> |
25 | #include <linux/errno.h> | |
26 | #include <linux/interrupt.h> | |
13802005 | 27 | #include <linux/irq.h> |
13802005 NR |
28 | #include <linux/scatterlist.h> |
29 | #include <linux/dma-mapping.h> | |
84c8976b | 30 | #include <linux/of_device.h> |
13802005 NR |
31 | #include <linux/delay.h> |
32 | #include <linux/crypto.h> | |
33 | #include <linux/cryptohash.h> | |
34 | #include <crypto/scatterwalk.h> | |
35 | #include <crypto/algapi.h> | |
92c203e2 | 36 | #include <crypto/internal/des.h> |
13802005 NR |
37 | #include <crypto/hash.h> |
38 | #include <crypto/internal/hash.h> | |
1f858040 | 39 | #include <linux/platform_data/crypto-atmel.h> |
13802005 NR |
40 | #include "atmel-tdes-regs.h" |
41 | ||
42 | /* TDES flags */ | |
1f858040 | 43 | #define TDES_FLAGS_MODE_MASK 0x00ff |
13802005 NR |
44 | #define TDES_FLAGS_ENCRYPT BIT(0) |
45 | #define TDES_FLAGS_CBC BIT(1) | |
46 | #define TDES_FLAGS_CFB BIT(2) | |
47 | #define TDES_FLAGS_CFB8 BIT(3) | |
48 | #define TDES_FLAGS_CFB16 BIT(4) | |
49 | #define TDES_FLAGS_CFB32 BIT(5) | |
1f858040 NR |
50 | #define TDES_FLAGS_CFB64 BIT(6) |
51 | #define TDES_FLAGS_OFB BIT(7) | |
13802005 NR |
52 | |
53 | #define TDES_FLAGS_INIT BIT(16) | |
54 | #define TDES_FLAGS_FAST BIT(17) | |
55 | #define TDES_FLAGS_BUSY BIT(18) | |
1f858040 | 56 | #define TDES_FLAGS_DMA BIT(19) |
13802005 | 57 | |
1f858040 | 58 | #define ATMEL_TDES_QUEUE_LENGTH 50 |
13802005 NR |
59 | |
60 | #define CFB8_BLOCK_SIZE 1 | |
61 | #define CFB16_BLOCK_SIZE 2 | |
62 | #define CFB32_BLOCK_SIZE 4 | |
13802005 | 63 | |
1f858040 NR |
64 | struct atmel_tdes_caps { |
65 | bool has_dma; | |
66 | u32 has_cfb_3keys; | |
67 | }; | |
13802005 NR |
68 | |
69 | struct atmel_tdes_dev; | |
70 | ||
71 | struct atmel_tdes_ctx { | |
72 | struct atmel_tdes_dev *dd; | |
73 | ||
74 | int keylen; | |
75 | u32 key[3*DES_KEY_SIZE / sizeof(u32)]; | |
76 | unsigned long flags; | |
1f858040 NR |
77 | |
78 | u16 block_size; | |
13802005 NR |
79 | }; |
80 | ||
81 | struct atmel_tdes_reqctx { | |
82 | unsigned long mode; | |
83 | }; | |
84 | ||
1f858040 NR |
85 | struct atmel_tdes_dma { |
86 | struct dma_chan *chan; | |
87 | struct dma_slave_config dma_conf; | |
88 | }; | |
89 | ||
13802005 NR |
90 | struct atmel_tdes_dev { |
91 | struct list_head list; | |
92 | unsigned long phys_base; | |
93 | void __iomem *io_base; | |
94 | ||
95 | struct atmel_tdes_ctx *ctx; | |
96 | struct device *dev; | |
97 | struct clk *iclk; | |
98 | int irq; | |
99 | ||
100 | unsigned long flags; | |
101 | int err; | |
102 | ||
103 | spinlock_t lock; | |
104 | struct crypto_queue queue; | |
105 | ||
106 | struct tasklet_struct done_task; | |
107 | struct tasklet_struct queue_task; | |
108 | ||
109 | struct ablkcipher_request *req; | |
110 | size_t total; | |
111 | ||
112 | struct scatterlist *in_sg; | |
1f858040 | 113 | unsigned int nb_in_sg; |
13802005 NR |
114 | size_t in_offset; |
115 | struct scatterlist *out_sg; | |
1f858040 | 116 | unsigned int nb_out_sg; |
13802005 NR |
117 | size_t out_offset; |
118 | ||
119 | size_t buflen; | |
120 | size_t dma_size; | |
121 | ||
122 | void *buf_in; | |
123 | int dma_in; | |
124 | dma_addr_t dma_addr_in; | |
1f858040 | 125 | struct atmel_tdes_dma dma_lch_in; |
13802005 NR |
126 | |
127 | void *buf_out; | |
128 | int dma_out; | |
129 | dma_addr_t dma_addr_out; | |
1f858040 NR |
130 | struct atmel_tdes_dma dma_lch_out; |
131 | ||
132 | struct atmel_tdes_caps caps; | |
133 | ||
134 | u32 hw_version; | |
13802005 NR |
135 | }; |
136 | ||
137 | struct atmel_tdes_drv { | |
138 | struct list_head dev_list; | |
139 | spinlock_t lock; | |
140 | }; | |
141 | ||
142 | static struct atmel_tdes_drv atmel_tdes = { | |
143 | .dev_list = LIST_HEAD_INIT(atmel_tdes.dev_list), | |
144 | .lock = __SPIN_LOCK_UNLOCKED(atmel_tdes.lock), | |
145 | }; | |
146 | ||
147 | static int atmel_tdes_sg_copy(struct scatterlist **sg, size_t *offset, | |
148 | void *buf, size_t buflen, size_t total, int out) | |
149 | { | |
4c147bcf | 150 | size_t count, off = 0; |
13802005 NR |
151 | |
152 | while (buflen && total) { | |
153 | count = min((*sg)->length - *offset, total); | |
154 | count = min(count, buflen); | |
155 | ||
156 | if (!count) | |
157 | return off; | |
158 | ||
159 | scatterwalk_map_and_copy(buf + off, *sg, *offset, count, out); | |
160 | ||
161 | off += count; | |
162 | buflen -= count; | |
163 | *offset += count; | |
164 | total -= count; | |
165 | ||
166 | if (*offset == (*sg)->length) { | |
167 | *sg = sg_next(*sg); | |
168 | if (*sg) | |
169 | *offset = 0; | |
170 | else | |
171 | total = 0; | |
172 | } | |
173 | } | |
174 | ||
175 | return off; | |
176 | } | |
177 | ||
178 | static inline u32 atmel_tdes_read(struct atmel_tdes_dev *dd, u32 offset) | |
179 | { | |
180 | return readl_relaxed(dd->io_base + offset); | |
181 | } | |
182 | ||
183 | static inline void atmel_tdes_write(struct atmel_tdes_dev *dd, | |
184 | u32 offset, u32 value) | |
185 | { | |
186 | writel_relaxed(value, dd->io_base + offset); | |
187 | } | |
188 | ||
189 | static void atmel_tdes_write_n(struct atmel_tdes_dev *dd, u32 offset, | |
190 | u32 *value, int count) | |
191 | { | |
192 | for (; count--; value++, offset += 4) | |
193 | atmel_tdes_write(dd, offset, *value); | |
194 | } | |
195 | ||
196 | static struct atmel_tdes_dev *atmel_tdes_find_dev(struct atmel_tdes_ctx *ctx) | |
197 | { | |
198 | struct atmel_tdes_dev *tdes_dd = NULL; | |
199 | struct atmel_tdes_dev *tmp; | |
200 | ||
201 | spin_lock_bh(&atmel_tdes.lock); | |
202 | if (!ctx->dd) { | |
203 | list_for_each_entry(tmp, &atmel_tdes.dev_list, list) { | |
204 | tdes_dd = tmp; | |
205 | break; | |
206 | } | |
207 | ctx->dd = tdes_dd; | |
208 | } else { | |
209 | tdes_dd = ctx->dd; | |
210 | } | |
211 | spin_unlock_bh(&atmel_tdes.lock); | |
212 | ||
213 | return tdes_dd; | |
214 | } | |
215 | ||
216 | static int atmel_tdes_hw_init(struct atmel_tdes_dev *dd) | |
217 | { | |
9d83d299 LC |
218 | int err; |
219 | ||
220 | err = clk_prepare_enable(dd->iclk); | |
221 | if (err) | |
222 | return err; | |
13802005 NR |
223 | |
224 | if (!(dd->flags & TDES_FLAGS_INIT)) { | |
225 | atmel_tdes_write(dd, TDES_CR, TDES_CR_SWRST); | |
226 | dd->flags |= TDES_FLAGS_INIT; | |
227 | dd->err = 0; | |
228 | } | |
229 | ||
230 | return 0; | |
231 | } | |
232 | ||
1f858040 NR |
233 | static inline unsigned int atmel_tdes_get_version(struct atmel_tdes_dev *dd) |
234 | { | |
235 | return atmel_tdes_read(dd, TDES_HW_VERSION) & 0x00000fff; | |
236 | } | |
237 | ||
238 | static void atmel_tdes_hw_version_init(struct atmel_tdes_dev *dd) | |
239 | { | |
240 | atmel_tdes_hw_init(dd); | |
241 | ||
242 | dd->hw_version = atmel_tdes_get_version(dd); | |
243 | ||
244 | dev_info(dd->dev, | |
245 | "version: 0x%x\n", dd->hw_version); | |
246 | ||
247 | clk_disable_unprepare(dd->iclk); | |
248 | } | |
249 | ||
250 | static void atmel_tdes_dma_callback(void *data) | |
251 | { | |
252 | struct atmel_tdes_dev *dd = data; | |
253 | ||
254 | /* dma_lch_out - completed */ | |
255 | tasklet_schedule(&dd->done_task); | |
256 | } | |
257 | ||
13802005 NR |
258 | static int atmel_tdes_write_ctrl(struct atmel_tdes_dev *dd) |
259 | { | |
260 | int err; | |
261 | u32 valcr = 0, valmr = TDES_MR_SMOD_PDC; | |
262 | ||
263 | err = atmel_tdes_hw_init(dd); | |
264 | ||
265 | if (err) | |
266 | return err; | |
267 | ||
1f858040 NR |
268 | if (!dd->caps.has_dma) |
269 | atmel_tdes_write(dd, TDES_PTCR, | |
270 | TDES_PTCR_TXTDIS | TDES_PTCR_RXTDIS); | |
13802005 NR |
271 | |
272 | /* MR register must be set before IV registers */ | |
273 | if (dd->ctx->keylen > (DES_KEY_SIZE << 1)) { | |
274 | valmr |= TDES_MR_KEYMOD_3KEY; | |
275 | valmr |= TDES_MR_TDESMOD_TDES; | |
276 | } else if (dd->ctx->keylen > DES_KEY_SIZE) { | |
277 | valmr |= TDES_MR_KEYMOD_2KEY; | |
278 | valmr |= TDES_MR_TDESMOD_TDES; | |
279 | } else { | |
280 | valmr |= TDES_MR_TDESMOD_DES; | |
281 | } | |
282 | ||
283 | if (dd->flags & TDES_FLAGS_CBC) { | |
284 | valmr |= TDES_MR_OPMOD_CBC; | |
285 | } else if (dd->flags & TDES_FLAGS_CFB) { | |
286 | valmr |= TDES_MR_OPMOD_CFB; | |
287 | ||
288 | if (dd->flags & TDES_FLAGS_CFB8) | |
289 | valmr |= TDES_MR_CFBS_8b; | |
290 | else if (dd->flags & TDES_FLAGS_CFB16) | |
291 | valmr |= TDES_MR_CFBS_16b; | |
292 | else if (dd->flags & TDES_FLAGS_CFB32) | |
293 | valmr |= TDES_MR_CFBS_32b; | |
1f858040 NR |
294 | else if (dd->flags & TDES_FLAGS_CFB64) |
295 | valmr |= TDES_MR_CFBS_64b; | |
13802005 NR |
296 | } else if (dd->flags & TDES_FLAGS_OFB) { |
297 | valmr |= TDES_MR_OPMOD_OFB; | |
298 | } | |
299 | ||
300 | if ((dd->flags & TDES_FLAGS_ENCRYPT) || (dd->flags & TDES_FLAGS_OFB)) | |
301 | valmr |= TDES_MR_CYPHER_ENC; | |
302 | ||
303 | atmel_tdes_write(dd, TDES_CR, valcr); | |
304 | atmel_tdes_write(dd, TDES_MR, valmr); | |
305 | ||
306 | atmel_tdes_write_n(dd, TDES_KEY1W1R, dd->ctx->key, | |
307 | dd->ctx->keylen >> 2); | |
308 | ||
309 | if (((dd->flags & TDES_FLAGS_CBC) || (dd->flags & TDES_FLAGS_CFB) || | |
310 | (dd->flags & TDES_FLAGS_OFB)) && dd->req->info) { | |
311 | atmel_tdes_write_n(dd, TDES_IV1R, dd->req->info, 2); | |
312 | } | |
313 | ||
314 | return 0; | |
315 | } | |
316 | ||
1f858040 | 317 | static int atmel_tdes_crypt_pdc_stop(struct atmel_tdes_dev *dd) |
13802005 NR |
318 | { |
319 | int err = 0; | |
320 | size_t count; | |
321 | ||
322 | atmel_tdes_write(dd, TDES_PTCR, TDES_PTCR_TXTDIS|TDES_PTCR_RXTDIS); | |
323 | ||
324 | if (dd->flags & TDES_FLAGS_FAST) { | |
325 | dma_unmap_sg(dd->dev, dd->out_sg, 1, DMA_FROM_DEVICE); | |
326 | dma_unmap_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE); | |
327 | } else { | |
328 | dma_sync_single_for_device(dd->dev, dd->dma_addr_out, | |
329 | dd->dma_size, DMA_FROM_DEVICE); | |
330 | ||
331 | /* copy data */ | |
332 | count = atmel_tdes_sg_copy(&dd->out_sg, &dd->out_offset, | |
333 | dd->buf_out, dd->buflen, dd->dma_size, 1); | |
334 | if (count != dd->dma_size) { | |
335 | err = -EINVAL; | |
4c147bcf | 336 | pr_err("not all data converted: %zu\n", count); |
13802005 NR |
337 | } |
338 | } | |
339 | ||
340 | return err; | |
341 | } | |
342 | ||
1f858040 | 343 | static int atmel_tdes_buff_init(struct atmel_tdes_dev *dd) |
13802005 NR |
344 | { |
345 | int err = -ENOMEM; | |
346 | ||
347 | dd->buf_in = (void *)__get_free_pages(GFP_KERNEL, 0); | |
348 | dd->buf_out = (void *)__get_free_pages(GFP_KERNEL, 0); | |
349 | dd->buflen = PAGE_SIZE; | |
350 | dd->buflen &= ~(DES_BLOCK_SIZE - 1); | |
351 | ||
352 | if (!dd->buf_in || !dd->buf_out) { | |
353 | dev_err(dd->dev, "unable to alloc pages.\n"); | |
354 | goto err_alloc; | |
355 | } | |
356 | ||
357 | /* MAP here */ | |
358 | dd->dma_addr_in = dma_map_single(dd->dev, dd->buf_in, | |
359 | dd->buflen, DMA_TO_DEVICE); | |
360 | if (dma_mapping_error(dd->dev, dd->dma_addr_in)) { | |
4c147bcf | 361 | dev_err(dd->dev, "dma %zd bytes error\n", dd->buflen); |
13802005 NR |
362 | err = -EINVAL; |
363 | goto err_map_in; | |
364 | } | |
365 | ||
366 | dd->dma_addr_out = dma_map_single(dd->dev, dd->buf_out, | |
367 | dd->buflen, DMA_FROM_DEVICE); | |
368 | if (dma_mapping_error(dd->dev, dd->dma_addr_out)) { | |
4c147bcf | 369 | dev_err(dd->dev, "dma %zd bytes error\n", dd->buflen); |
13802005 NR |
370 | err = -EINVAL; |
371 | goto err_map_out; | |
372 | } | |
373 | ||
374 | return 0; | |
375 | ||
376 | err_map_out: | |
377 | dma_unmap_single(dd->dev, dd->dma_addr_in, dd->buflen, | |
378 | DMA_TO_DEVICE); | |
379 | err_map_in: | |
088f628c | 380 | err_alloc: |
13802005 NR |
381 | free_page((unsigned long)dd->buf_out); |
382 | free_page((unsigned long)dd->buf_in); | |
13802005 NR |
383 | if (err) |
384 | pr_err("error: %d\n", err); | |
385 | return err; | |
386 | } | |
387 | ||
1f858040 | 388 | static void atmel_tdes_buff_cleanup(struct atmel_tdes_dev *dd) |
13802005 NR |
389 | { |
390 | dma_unmap_single(dd->dev, dd->dma_addr_out, dd->buflen, | |
391 | DMA_FROM_DEVICE); | |
392 | dma_unmap_single(dd->dev, dd->dma_addr_in, dd->buflen, | |
393 | DMA_TO_DEVICE); | |
394 | free_page((unsigned long)dd->buf_out); | |
395 | free_page((unsigned long)dd->buf_in); | |
396 | } | |
397 | ||
1f858040 | 398 | static int atmel_tdes_crypt_pdc(struct crypto_tfm *tfm, dma_addr_t dma_addr_in, |
13802005 NR |
399 | dma_addr_t dma_addr_out, int length) |
400 | { | |
401 | struct atmel_tdes_ctx *ctx = crypto_tfm_ctx(tfm); | |
402 | struct atmel_tdes_dev *dd = ctx->dd; | |
403 | int len32; | |
404 | ||
405 | dd->dma_size = length; | |
406 | ||
407 | if (!(dd->flags & TDES_FLAGS_FAST)) { | |
408 | dma_sync_single_for_device(dd->dev, dma_addr_in, length, | |
409 | DMA_TO_DEVICE); | |
410 | } | |
411 | ||
412 | if ((dd->flags & TDES_FLAGS_CFB) && (dd->flags & TDES_FLAGS_CFB8)) | |
413 | len32 = DIV_ROUND_UP(length, sizeof(u8)); | |
414 | else if ((dd->flags & TDES_FLAGS_CFB) && (dd->flags & TDES_FLAGS_CFB16)) | |
415 | len32 = DIV_ROUND_UP(length, sizeof(u16)); | |
416 | else | |
417 | len32 = DIV_ROUND_UP(length, sizeof(u32)); | |
418 | ||
419 | atmel_tdes_write(dd, TDES_PTCR, TDES_PTCR_TXTDIS|TDES_PTCR_RXTDIS); | |
420 | atmel_tdes_write(dd, TDES_TPR, dma_addr_in); | |
421 | atmel_tdes_write(dd, TDES_TCR, len32); | |
422 | atmel_tdes_write(dd, TDES_RPR, dma_addr_out); | |
423 | atmel_tdes_write(dd, TDES_RCR, len32); | |
424 | ||
425 | /* Enable Interrupt */ | |
426 | atmel_tdes_write(dd, TDES_IER, TDES_INT_ENDRX); | |
427 | ||
428 | /* Start DMA transfer */ | |
429 | atmel_tdes_write(dd, TDES_PTCR, TDES_PTCR_TXTEN | TDES_PTCR_RXTEN); | |
430 | ||
431 | return 0; | |
432 | } | |
433 | ||
1f858040 NR |
434 | static int atmel_tdes_crypt_dma(struct crypto_tfm *tfm, dma_addr_t dma_addr_in, |
435 | dma_addr_t dma_addr_out, int length) | |
436 | { | |
437 | struct atmel_tdes_ctx *ctx = crypto_tfm_ctx(tfm); | |
438 | struct atmel_tdes_dev *dd = ctx->dd; | |
439 | struct scatterlist sg[2]; | |
440 | struct dma_async_tx_descriptor *in_desc, *out_desc; | |
441 | ||
442 | dd->dma_size = length; | |
443 | ||
444 | if (!(dd->flags & TDES_FLAGS_FAST)) { | |
445 | dma_sync_single_for_device(dd->dev, dma_addr_in, length, | |
446 | DMA_TO_DEVICE); | |
447 | } | |
448 | ||
449 | if (dd->flags & TDES_FLAGS_CFB8) { | |
450 | dd->dma_lch_in.dma_conf.dst_addr_width = | |
451 | DMA_SLAVE_BUSWIDTH_1_BYTE; | |
452 | dd->dma_lch_out.dma_conf.src_addr_width = | |
453 | DMA_SLAVE_BUSWIDTH_1_BYTE; | |
454 | } else if (dd->flags & TDES_FLAGS_CFB16) { | |
455 | dd->dma_lch_in.dma_conf.dst_addr_width = | |
456 | DMA_SLAVE_BUSWIDTH_2_BYTES; | |
457 | dd->dma_lch_out.dma_conf.src_addr_width = | |
458 | DMA_SLAVE_BUSWIDTH_2_BYTES; | |
459 | } else { | |
460 | dd->dma_lch_in.dma_conf.dst_addr_width = | |
461 | DMA_SLAVE_BUSWIDTH_4_BYTES; | |
462 | dd->dma_lch_out.dma_conf.src_addr_width = | |
463 | DMA_SLAVE_BUSWIDTH_4_BYTES; | |
464 | } | |
465 | ||
466 | dmaengine_slave_config(dd->dma_lch_in.chan, &dd->dma_lch_in.dma_conf); | |
467 | dmaengine_slave_config(dd->dma_lch_out.chan, &dd->dma_lch_out.dma_conf); | |
468 | ||
469 | dd->flags |= TDES_FLAGS_DMA; | |
470 | ||
471 | sg_init_table(&sg[0], 1); | |
472 | sg_dma_address(&sg[0]) = dma_addr_in; | |
473 | sg_dma_len(&sg[0]) = length; | |
474 | ||
475 | sg_init_table(&sg[1], 1); | |
476 | sg_dma_address(&sg[1]) = dma_addr_out; | |
477 | sg_dma_len(&sg[1]) = length; | |
478 | ||
479 | in_desc = dmaengine_prep_slave_sg(dd->dma_lch_in.chan, &sg[0], | |
480 | 1, DMA_MEM_TO_DEV, | |
481 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); | |
482 | if (!in_desc) | |
483 | return -EINVAL; | |
484 | ||
485 | out_desc = dmaengine_prep_slave_sg(dd->dma_lch_out.chan, &sg[1], | |
486 | 1, DMA_DEV_TO_MEM, | |
487 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); | |
488 | if (!out_desc) | |
489 | return -EINVAL; | |
490 | ||
491 | out_desc->callback = atmel_tdes_dma_callback; | |
492 | out_desc->callback_param = dd; | |
493 | ||
494 | dmaengine_submit(out_desc); | |
495 | dma_async_issue_pending(dd->dma_lch_out.chan); | |
496 | ||
497 | dmaengine_submit(in_desc); | |
498 | dma_async_issue_pending(dd->dma_lch_in.chan); | |
499 | ||
500 | return 0; | |
501 | } | |
502 | ||
503 | static int atmel_tdes_crypt_start(struct atmel_tdes_dev *dd) | |
13802005 NR |
504 | { |
505 | struct crypto_tfm *tfm = crypto_ablkcipher_tfm( | |
506 | crypto_ablkcipher_reqtfm(dd->req)); | |
507 | int err, fast = 0, in, out; | |
508 | size_t count; | |
509 | dma_addr_t addr_in, addr_out; | |
510 | ||
1f858040 | 511 | if ((!dd->in_offset) && (!dd->out_offset)) { |
13802005 | 512 | /* check for alignment */ |
1f858040 NR |
513 | in = IS_ALIGNED((u32)dd->in_sg->offset, sizeof(u32)) && |
514 | IS_ALIGNED(dd->in_sg->length, dd->ctx->block_size); | |
515 | out = IS_ALIGNED((u32)dd->out_sg->offset, sizeof(u32)) && | |
516 | IS_ALIGNED(dd->out_sg->length, dd->ctx->block_size); | |
13802005 | 517 | fast = in && out; |
1f858040 NR |
518 | |
519 | if (sg_dma_len(dd->in_sg) != sg_dma_len(dd->out_sg)) | |
520 | fast = 0; | |
13802005 NR |
521 | } |
522 | ||
1f858040 | 523 | |
13802005 | 524 | if (fast) { |
4c147bcf AB |
525 | count = min_t(size_t, dd->total, sg_dma_len(dd->in_sg)); |
526 | count = min_t(size_t, count, sg_dma_len(dd->out_sg)); | |
13802005 | 527 | |
13802005 NR |
528 | err = dma_map_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE); |
529 | if (!err) { | |
530 | dev_err(dd->dev, "dma_map_sg() error\n"); | |
531 | return -EINVAL; | |
532 | } | |
533 | ||
534 | err = dma_map_sg(dd->dev, dd->out_sg, 1, | |
535 | DMA_FROM_DEVICE); | |
536 | if (!err) { | |
537 | dev_err(dd->dev, "dma_map_sg() error\n"); | |
538 | dma_unmap_sg(dd->dev, dd->in_sg, 1, | |
539 | DMA_TO_DEVICE); | |
540 | return -EINVAL; | |
541 | } | |
542 | ||
543 | addr_in = sg_dma_address(dd->in_sg); | |
544 | addr_out = sg_dma_address(dd->out_sg); | |
545 | ||
546 | dd->flags |= TDES_FLAGS_FAST; | |
547 | ||
548 | } else { | |
549 | /* use cache buffers */ | |
550 | count = atmel_tdes_sg_copy(&dd->in_sg, &dd->in_offset, | |
551 | dd->buf_in, dd->buflen, dd->total, 0); | |
552 | ||
553 | addr_in = dd->dma_addr_in; | |
554 | addr_out = dd->dma_addr_out; | |
555 | ||
556 | dd->flags &= ~TDES_FLAGS_FAST; | |
13802005 NR |
557 | } |
558 | ||
559 | dd->total -= count; | |
560 | ||
1f858040 NR |
561 | if (dd->caps.has_dma) |
562 | err = atmel_tdes_crypt_dma(tfm, addr_in, addr_out, count); | |
563 | else | |
564 | err = atmel_tdes_crypt_pdc(tfm, addr_in, addr_out, count); | |
565 | ||
566 | if (err && (dd->flags & TDES_FLAGS_FAST)) { | |
13802005 NR |
567 | dma_unmap_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE); |
568 | dma_unmap_sg(dd->dev, dd->out_sg, 1, DMA_TO_DEVICE); | |
569 | } | |
570 | ||
571 | return err; | |
572 | } | |
573 | ||
13802005 NR |
574 | static void atmel_tdes_finish_req(struct atmel_tdes_dev *dd, int err) |
575 | { | |
576 | struct ablkcipher_request *req = dd->req; | |
577 | ||
578 | clk_disable_unprepare(dd->iclk); | |
579 | ||
580 | dd->flags &= ~TDES_FLAGS_BUSY; | |
581 | ||
582 | req->base.complete(&req->base, err); | |
583 | } | |
584 | ||
585 | static int atmel_tdes_handle_queue(struct atmel_tdes_dev *dd, | |
586 | struct ablkcipher_request *req) | |
587 | { | |
588 | struct crypto_async_request *async_req, *backlog; | |
589 | struct atmel_tdes_ctx *ctx; | |
590 | struct atmel_tdes_reqctx *rctx; | |
591 | unsigned long flags; | |
592 | int err, ret = 0; | |
593 | ||
594 | spin_lock_irqsave(&dd->lock, flags); | |
595 | if (req) | |
596 | ret = ablkcipher_enqueue_request(&dd->queue, req); | |
597 | if (dd->flags & TDES_FLAGS_BUSY) { | |
598 | spin_unlock_irqrestore(&dd->lock, flags); | |
599 | return ret; | |
600 | } | |
601 | backlog = crypto_get_backlog(&dd->queue); | |
602 | async_req = crypto_dequeue_request(&dd->queue); | |
603 | if (async_req) | |
604 | dd->flags |= TDES_FLAGS_BUSY; | |
605 | spin_unlock_irqrestore(&dd->lock, flags); | |
606 | ||
607 | if (!async_req) | |
608 | return ret; | |
609 | ||
610 | if (backlog) | |
611 | backlog->complete(backlog, -EINPROGRESS); | |
612 | ||
613 | req = ablkcipher_request_cast(async_req); | |
614 | ||
615 | /* assign new request to device */ | |
616 | dd->req = req; | |
617 | dd->total = req->nbytes; | |
618 | dd->in_offset = 0; | |
619 | dd->in_sg = req->src; | |
620 | dd->out_offset = 0; | |
621 | dd->out_sg = req->dst; | |
622 | ||
623 | rctx = ablkcipher_request_ctx(req); | |
624 | ctx = crypto_ablkcipher_ctx(crypto_ablkcipher_reqtfm(req)); | |
625 | rctx->mode &= TDES_FLAGS_MODE_MASK; | |
626 | dd->flags = (dd->flags & ~TDES_FLAGS_MODE_MASK) | rctx->mode; | |
627 | dd->ctx = ctx; | |
628 | ctx->dd = dd; | |
629 | ||
630 | err = atmel_tdes_write_ctrl(dd); | |
631 | if (!err) | |
1f858040 | 632 | err = atmel_tdes_crypt_start(dd); |
13802005 NR |
633 | if (err) { |
634 | /* des_task will not finish it, so do it here */ | |
635 | atmel_tdes_finish_req(dd, err); | |
636 | tasklet_schedule(&dd->queue_task); | |
637 | } | |
638 | ||
639 | return ret; | |
640 | } | |
641 | ||
1f858040 NR |
642 | static int atmel_tdes_crypt_dma_stop(struct atmel_tdes_dev *dd) |
643 | { | |
644 | int err = -EINVAL; | |
645 | size_t count; | |
646 | ||
647 | if (dd->flags & TDES_FLAGS_DMA) { | |
648 | err = 0; | |
649 | if (dd->flags & TDES_FLAGS_FAST) { | |
650 | dma_unmap_sg(dd->dev, dd->out_sg, 1, DMA_FROM_DEVICE); | |
651 | dma_unmap_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE); | |
652 | } else { | |
653 | dma_sync_single_for_device(dd->dev, dd->dma_addr_out, | |
654 | dd->dma_size, DMA_FROM_DEVICE); | |
655 | ||
656 | /* copy data */ | |
657 | count = atmel_tdes_sg_copy(&dd->out_sg, &dd->out_offset, | |
658 | dd->buf_out, dd->buflen, dd->dma_size, 1); | |
659 | if (count != dd->dma_size) { | |
660 | err = -EINVAL; | |
4c147bcf | 661 | pr_err("not all data converted: %zu\n", count); |
1f858040 NR |
662 | } |
663 | } | |
664 | } | |
665 | return err; | |
666 | } | |
13802005 NR |
667 | |
668 | static int atmel_tdes_crypt(struct ablkcipher_request *req, unsigned long mode) | |
669 | { | |
670 | struct atmel_tdes_ctx *ctx = crypto_ablkcipher_ctx( | |
671 | crypto_ablkcipher_reqtfm(req)); | |
672 | struct atmel_tdes_reqctx *rctx = ablkcipher_request_ctx(req); | |
13802005 NR |
673 | |
674 | if (mode & TDES_FLAGS_CFB8) { | |
675 | if (!IS_ALIGNED(req->nbytes, CFB8_BLOCK_SIZE)) { | |
676 | pr_err("request size is not exact amount of CFB8 blocks\n"); | |
677 | return -EINVAL; | |
678 | } | |
1f858040 | 679 | ctx->block_size = CFB8_BLOCK_SIZE; |
13802005 NR |
680 | } else if (mode & TDES_FLAGS_CFB16) { |
681 | if (!IS_ALIGNED(req->nbytes, CFB16_BLOCK_SIZE)) { | |
682 | pr_err("request size is not exact amount of CFB16 blocks\n"); | |
683 | return -EINVAL; | |
684 | } | |
1f858040 | 685 | ctx->block_size = CFB16_BLOCK_SIZE; |
13802005 NR |
686 | } else if (mode & TDES_FLAGS_CFB32) { |
687 | if (!IS_ALIGNED(req->nbytes, CFB32_BLOCK_SIZE)) { | |
688 | pr_err("request size is not exact amount of CFB32 blocks\n"); | |
689 | return -EINVAL; | |
690 | } | |
1f858040 NR |
691 | ctx->block_size = CFB32_BLOCK_SIZE; |
692 | } else { | |
693 | if (!IS_ALIGNED(req->nbytes, DES_BLOCK_SIZE)) { | |
694 | pr_err("request size is not exact amount of DES blocks\n"); | |
695 | return -EINVAL; | |
696 | } | |
697 | ctx->block_size = DES_BLOCK_SIZE; | |
13802005 NR |
698 | } |
699 | ||
1f858040 NR |
700 | rctx->mode = mode; |
701 | ||
702 | return atmel_tdes_handle_queue(ctx->dd, req); | |
703 | } | |
704 | ||
705 | static bool atmel_tdes_filter(struct dma_chan *chan, void *slave) | |
706 | { | |
707 | struct at_dma_slave *sl = slave; | |
708 | ||
709 | if (sl && sl->dma_dev == chan->device->dev) { | |
710 | chan->private = sl; | |
711 | return true; | |
712 | } else { | |
713 | return false; | |
714 | } | |
715 | } | |
716 | ||
717 | static int atmel_tdes_dma_init(struct atmel_tdes_dev *dd, | |
718 | struct crypto_platform_data *pdata) | |
719 | { | |
84c8976b NF |
720 | dma_cap_mask_t mask; |
721 | ||
722 | dma_cap_zero(mask); | |
723 | dma_cap_set(DMA_SLAVE, mask); | |
724 | ||
725 | /* Try to grab 2 DMA channels */ | |
726 | dd->dma_lch_in.chan = dma_request_slave_channel_compat(mask, | |
727 | atmel_tdes_filter, &pdata->dma_slave->rxdata, dd->dev, "tx"); | |
728 | if (!dd->dma_lch_in.chan) | |
729 | goto err_dma_in; | |
730 | ||
731 | dd->dma_lch_in.dma_conf.direction = DMA_MEM_TO_DEV; | |
732 | dd->dma_lch_in.dma_conf.dst_addr = dd->phys_base + | |
733 | TDES_IDATA1R; | |
734 | dd->dma_lch_in.dma_conf.src_maxburst = 1; | |
735 | dd->dma_lch_in.dma_conf.src_addr_width = | |
736 | DMA_SLAVE_BUSWIDTH_4_BYTES; | |
737 | dd->dma_lch_in.dma_conf.dst_maxburst = 1; | |
738 | dd->dma_lch_in.dma_conf.dst_addr_width = | |
739 | DMA_SLAVE_BUSWIDTH_4_BYTES; | |
740 | dd->dma_lch_in.dma_conf.device_fc = false; | |
741 | ||
742 | dd->dma_lch_out.chan = dma_request_slave_channel_compat(mask, | |
743 | atmel_tdes_filter, &pdata->dma_slave->txdata, dd->dev, "rx"); | |
744 | if (!dd->dma_lch_out.chan) | |
745 | goto err_dma_out; | |
746 | ||
747 | dd->dma_lch_out.dma_conf.direction = DMA_DEV_TO_MEM; | |
748 | dd->dma_lch_out.dma_conf.src_addr = dd->phys_base + | |
749 | TDES_ODATA1R; | |
750 | dd->dma_lch_out.dma_conf.src_maxburst = 1; | |
751 | dd->dma_lch_out.dma_conf.src_addr_width = | |
752 | DMA_SLAVE_BUSWIDTH_4_BYTES; | |
753 | dd->dma_lch_out.dma_conf.dst_maxburst = 1; | |
754 | dd->dma_lch_out.dma_conf.dst_addr_width = | |
755 | DMA_SLAVE_BUSWIDTH_4_BYTES; | |
756 | dd->dma_lch_out.dma_conf.device_fc = false; | |
1f858040 | 757 | |
84c8976b | 758 | return 0; |
13802005 | 759 | |
1f858040 NR |
760 | err_dma_out: |
761 | dma_release_channel(dd->dma_lch_in.chan); | |
762 | err_dma_in: | |
84c8976b | 763 | dev_warn(dd->dev, "no DMA channel available\n"); |
3c88761e | 764 | return -ENODEV; |
1f858040 | 765 | } |
13802005 | 766 | |
1f858040 NR |
767 | static void atmel_tdes_dma_cleanup(struct atmel_tdes_dev *dd) |
768 | { | |
769 | dma_release_channel(dd->dma_lch_in.chan); | |
770 | dma_release_channel(dd->dma_lch_out.chan); | |
13802005 NR |
771 | } |
772 | ||
773 | static int atmel_des_setkey(struct crypto_ablkcipher *tfm, const u8 *key, | |
774 | unsigned int keylen) | |
775 | { | |
13802005 | 776 | struct atmel_tdes_ctx *ctx = crypto_ablkcipher_ctx(tfm); |
92c203e2 | 777 | int err; |
13802005 | 778 | |
92c203e2 AB |
779 | err = verify_ablkcipher_des_key(tfm, key); |
780 | if (err) | |
781 | return err; | |
13802005 NR |
782 | |
783 | memcpy(ctx->key, key, keylen); | |
784 | ctx->keylen = keylen; | |
785 | ||
786 | return 0; | |
787 | } | |
788 | ||
789 | static int atmel_tdes_setkey(struct crypto_ablkcipher *tfm, const u8 *key, | |
790 | unsigned int keylen) | |
791 | { | |
792 | struct atmel_tdes_ctx *ctx = crypto_ablkcipher_ctx(tfm); | |
52ea3cd2 | 793 | int err; |
13802005 | 794 | |
92c203e2 AB |
795 | err = verify_ablkcipher_des3_key(tfm, key); |
796 | if (err) | |
52ea3cd2 | 797 | return err; |
13802005 NR |
798 | |
799 | memcpy(ctx->key, key, keylen); | |
800 | ctx->keylen = keylen; | |
801 | ||
802 | return 0; | |
803 | } | |
804 | ||
805 | static int atmel_tdes_ecb_encrypt(struct ablkcipher_request *req) | |
806 | { | |
807 | return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT); | |
808 | } | |
809 | ||
810 | static int atmel_tdes_ecb_decrypt(struct ablkcipher_request *req) | |
811 | { | |
812 | return atmel_tdes_crypt(req, 0); | |
813 | } | |
814 | ||
815 | static int atmel_tdes_cbc_encrypt(struct ablkcipher_request *req) | |
816 | { | |
817 | return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT | TDES_FLAGS_CBC); | |
818 | } | |
819 | ||
820 | static int atmel_tdes_cbc_decrypt(struct ablkcipher_request *req) | |
821 | { | |
822 | return atmel_tdes_crypt(req, TDES_FLAGS_CBC); | |
823 | } | |
824 | static int atmel_tdes_cfb_encrypt(struct ablkcipher_request *req) | |
825 | { | |
826 | return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT | TDES_FLAGS_CFB); | |
827 | } | |
828 | ||
829 | static int atmel_tdes_cfb_decrypt(struct ablkcipher_request *req) | |
830 | { | |
831 | return atmel_tdes_crypt(req, TDES_FLAGS_CFB); | |
832 | } | |
833 | ||
834 | static int atmel_tdes_cfb8_encrypt(struct ablkcipher_request *req) | |
835 | { | |
836 | return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT | TDES_FLAGS_CFB | | |
837 | TDES_FLAGS_CFB8); | |
838 | } | |
839 | ||
840 | static int atmel_tdes_cfb8_decrypt(struct ablkcipher_request *req) | |
841 | { | |
842 | return atmel_tdes_crypt(req, TDES_FLAGS_CFB | TDES_FLAGS_CFB8); | |
843 | } | |
844 | ||
845 | static int atmel_tdes_cfb16_encrypt(struct ablkcipher_request *req) | |
846 | { | |
847 | return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT | TDES_FLAGS_CFB | | |
848 | TDES_FLAGS_CFB16); | |
849 | } | |
850 | ||
851 | static int atmel_tdes_cfb16_decrypt(struct ablkcipher_request *req) | |
852 | { | |
853 | return atmel_tdes_crypt(req, TDES_FLAGS_CFB | TDES_FLAGS_CFB16); | |
854 | } | |
855 | ||
856 | static int atmel_tdes_cfb32_encrypt(struct ablkcipher_request *req) | |
857 | { | |
858 | return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT | TDES_FLAGS_CFB | | |
859 | TDES_FLAGS_CFB32); | |
860 | } | |
861 | ||
862 | static int atmel_tdes_cfb32_decrypt(struct ablkcipher_request *req) | |
863 | { | |
864 | return atmel_tdes_crypt(req, TDES_FLAGS_CFB | TDES_FLAGS_CFB32); | |
865 | } | |
866 | ||
867 | static int atmel_tdes_ofb_encrypt(struct ablkcipher_request *req) | |
868 | { | |
869 | return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT | TDES_FLAGS_OFB); | |
870 | } | |
871 | ||
872 | static int atmel_tdes_ofb_decrypt(struct ablkcipher_request *req) | |
873 | { | |
874 | return atmel_tdes_crypt(req, TDES_FLAGS_OFB); | |
875 | } | |
876 | ||
877 | static int atmel_tdes_cra_init(struct crypto_tfm *tfm) | |
878 | { | |
1f858040 NR |
879 | struct atmel_tdes_ctx *ctx = crypto_tfm_ctx(tfm); |
880 | struct atmel_tdes_dev *dd; | |
881 | ||
13802005 NR |
882 | tfm->crt_ablkcipher.reqsize = sizeof(struct atmel_tdes_reqctx); |
883 | ||
1f858040 NR |
884 | dd = atmel_tdes_find_dev(ctx); |
885 | if (!dd) | |
886 | return -ENODEV; | |
887 | ||
13802005 NR |
888 | return 0; |
889 | } | |
890 | ||
13802005 NR |
891 | static struct crypto_alg tdes_algs[] = { |
892 | { | |
893 | .cra_name = "ecb(des)", | |
894 | .cra_driver_name = "atmel-ecb-des", | |
895 | .cra_priority = 100, | |
896 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
897 | .cra_blocksize = DES_BLOCK_SIZE, | |
898 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
1f858040 | 899 | .cra_alignmask = 0x7, |
13802005 NR |
900 | .cra_type = &crypto_ablkcipher_type, |
901 | .cra_module = THIS_MODULE, | |
902 | .cra_init = atmel_tdes_cra_init, | |
13802005 NR |
903 | .cra_u.ablkcipher = { |
904 | .min_keysize = DES_KEY_SIZE, | |
905 | .max_keysize = DES_KEY_SIZE, | |
906 | .setkey = atmel_des_setkey, | |
907 | .encrypt = atmel_tdes_ecb_encrypt, | |
908 | .decrypt = atmel_tdes_ecb_decrypt, | |
909 | } | |
910 | }, | |
911 | { | |
912 | .cra_name = "cbc(des)", | |
913 | .cra_driver_name = "atmel-cbc-des", | |
914 | .cra_priority = 100, | |
915 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
916 | .cra_blocksize = DES_BLOCK_SIZE, | |
917 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
1f858040 | 918 | .cra_alignmask = 0x7, |
13802005 NR |
919 | .cra_type = &crypto_ablkcipher_type, |
920 | .cra_module = THIS_MODULE, | |
921 | .cra_init = atmel_tdes_cra_init, | |
13802005 NR |
922 | .cra_u.ablkcipher = { |
923 | .min_keysize = DES_KEY_SIZE, | |
924 | .max_keysize = DES_KEY_SIZE, | |
925 | .ivsize = DES_BLOCK_SIZE, | |
926 | .setkey = atmel_des_setkey, | |
927 | .encrypt = atmel_tdes_cbc_encrypt, | |
928 | .decrypt = atmel_tdes_cbc_decrypt, | |
929 | } | |
930 | }, | |
931 | { | |
932 | .cra_name = "cfb(des)", | |
933 | .cra_driver_name = "atmel-cfb-des", | |
934 | .cra_priority = 100, | |
935 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
936 | .cra_blocksize = DES_BLOCK_SIZE, | |
937 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
1f858040 | 938 | .cra_alignmask = 0x7, |
13802005 NR |
939 | .cra_type = &crypto_ablkcipher_type, |
940 | .cra_module = THIS_MODULE, | |
941 | .cra_init = atmel_tdes_cra_init, | |
13802005 NR |
942 | .cra_u.ablkcipher = { |
943 | .min_keysize = DES_KEY_SIZE, | |
944 | .max_keysize = DES_KEY_SIZE, | |
945 | .ivsize = DES_BLOCK_SIZE, | |
946 | .setkey = atmel_des_setkey, | |
947 | .encrypt = atmel_tdes_cfb_encrypt, | |
948 | .decrypt = atmel_tdes_cfb_decrypt, | |
949 | } | |
950 | }, | |
951 | { | |
952 | .cra_name = "cfb8(des)", | |
953 | .cra_driver_name = "atmel-cfb8-des", | |
954 | .cra_priority = 100, | |
955 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
956 | .cra_blocksize = CFB8_BLOCK_SIZE, | |
957 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
958 | .cra_alignmask = 0, | |
959 | .cra_type = &crypto_ablkcipher_type, | |
960 | .cra_module = THIS_MODULE, | |
961 | .cra_init = atmel_tdes_cra_init, | |
13802005 NR |
962 | .cra_u.ablkcipher = { |
963 | .min_keysize = DES_KEY_SIZE, | |
964 | .max_keysize = DES_KEY_SIZE, | |
965 | .ivsize = DES_BLOCK_SIZE, | |
966 | .setkey = atmel_des_setkey, | |
967 | .encrypt = atmel_tdes_cfb8_encrypt, | |
968 | .decrypt = atmel_tdes_cfb8_decrypt, | |
969 | } | |
970 | }, | |
971 | { | |
972 | .cra_name = "cfb16(des)", | |
973 | .cra_driver_name = "atmel-cfb16-des", | |
974 | .cra_priority = 100, | |
975 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
976 | .cra_blocksize = CFB16_BLOCK_SIZE, | |
977 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
1f858040 | 978 | .cra_alignmask = 0x1, |
13802005 NR |
979 | .cra_type = &crypto_ablkcipher_type, |
980 | .cra_module = THIS_MODULE, | |
981 | .cra_init = atmel_tdes_cra_init, | |
13802005 NR |
982 | .cra_u.ablkcipher = { |
983 | .min_keysize = DES_KEY_SIZE, | |
984 | .max_keysize = DES_KEY_SIZE, | |
985 | .ivsize = DES_BLOCK_SIZE, | |
986 | .setkey = atmel_des_setkey, | |
987 | .encrypt = atmel_tdes_cfb16_encrypt, | |
988 | .decrypt = atmel_tdes_cfb16_decrypt, | |
989 | } | |
990 | }, | |
991 | { | |
992 | .cra_name = "cfb32(des)", | |
993 | .cra_driver_name = "atmel-cfb32-des", | |
994 | .cra_priority = 100, | |
995 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
996 | .cra_blocksize = CFB32_BLOCK_SIZE, | |
997 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
1f858040 | 998 | .cra_alignmask = 0x3, |
13802005 NR |
999 | .cra_type = &crypto_ablkcipher_type, |
1000 | .cra_module = THIS_MODULE, | |
1001 | .cra_init = atmel_tdes_cra_init, | |
13802005 NR |
1002 | .cra_u.ablkcipher = { |
1003 | .min_keysize = DES_KEY_SIZE, | |
1004 | .max_keysize = DES_KEY_SIZE, | |
1005 | .ivsize = DES_BLOCK_SIZE, | |
1006 | .setkey = atmel_des_setkey, | |
1007 | .encrypt = atmel_tdes_cfb32_encrypt, | |
1008 | .decrypt = atmel_tdes_cfb32_decrypt, | |
1009 | } | |
1010 | }, | |
1011 | { | |
1012 | .cra_name = "ofb(des)", | |
1013 | .cra_driver_name = "atmel-ofb-des", | |
1014 | .cra_priority = 100, | |
1015 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
1016 | .cra_blocksize = DES_BLOCK_SIZE, | |
1017 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
1f858040 | 1018 | .cra_alignmask = 0x7, |
13802005 NR |
1019 | .cra_type = &crypto_ablkcipher_type, |
1020 | .cra_module = THIS_MODULE, | |
1021 | .cra_init = atmel_tdes_cra_init, | |
13802005 NR |
1022 | .cra_u.ablkcipher = { |
1023 | .min_keysize = DES_KEY_SIZE, | |
1024 | .max_keysize = DES_KEY_SIZE, | |
1025 | .ivsize = DES_BLOCK_SIZE, | |
1026 | .setkey = atmel_des_setkey, | |
1027 | .encrypt = atmel_tdes_ofb_encrypt, | |
1028 | .decrypt = atmel_tdes_ofb_decrypt, | |
1029 | } | |
1030 | }, | |
1031 | { | |
1032 | .cra_name = "ecb(des3_ede)", | |
1033 | .cra_driver_name = "atmel-ecb-tdes", | |
1034 | .cra_priority = 100, | |
1035 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
1036 | .cra_blocksize = DES_BLOCK_SIZE, | |
1037 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
1f858040 | 1038 | .cra_alignmask = 0x7, |
13802005 NR |
1039 | .cra_type = &crypto_ablkcipher_type, |
1040 | .cra_module = THIS_MODULE, | |
1041 | .cra_init = atmel_tdes_cra_init, | |
13802005 | 1042 | .cra_u.ablkcipher = { |
52ea3cd2 | 1043 | .min_keysize = 3 * DES_KEY_SIZE, |
13802005 NR |
1044 | .max_keysize = 3 * DES_KEY_SIZE, |
1045 | .setkey = atmel_tdes_setkey, | |
1046 | .encrypt = atmel_tdes_ecb_encrypt, | |
1047 | .decrypt = atmel_tdes_ecb_decrypt, | |
1048 | } | |
1049 | }, | |
1050 | { | |
1051 | .cra_name = "cbc(des3_ede)", | |
1052 | .cra_driver_name = "atmel-cbc-tdes", | |
1053 | .cra_priority = 100, | |
1054 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
1055 | .cra_blocksize = DES_BLOCK_SIZE, | |
1056 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
1f858040 | 1057 | .cra_alignmask = 0x7, |
13802005 NR |
1058 | .cra_type = &crypto_ablkcipher_type, |
1059 | .cra_module = THIS_MODULE, | |
1060 | .cra_init = atmel_tdes_cra_init, | |
13802005 | 1061 | .cra_u.ablkcipher = { |
52ea3cd2 | 1062 | .min_keysize = 3*DES_KEY_SIZE, |
13802005 NR |
1063 | .max_keysize = 3*DES_KEY_SIZE, |
1064 | .ivsize = DES_BLOCK_SIZE, | |
1065 | .setkey = atmel_tdes_setkey, | |
1066 | .encrypt = atmel_tdes_cbc_encrypt, | |
1067 | .decrypt = atmel_tdes_cbc_decrypt, | |
1068 | } | |
1069 | }, | |
13802005 NR |
1070 | { |
1071 | .cra_name = "ofb(des3_ede)", | |
1072 | .cra_driver_name = "atmel-ofb-tdes", | |
1073 | .cra_priority = 100, | |
1074 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
1075 | .cra_blocksize = DES_BLOCK_SIZE, | |
1076 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
1f858040 | 1077 | .cra_alignmask = 0x7, |
13802005 NR |
1078 | .cra_type = &crypto_ablkcipher_type, |
1079 | .cra_module = THIS_MODULE, | |
1080 | .cra_init = atmel_tdes_cra_init, | |
13802005 | 1081 | .cra_u.ablkcipher = { |
52ea3cd2 | 1082 | .min_keysize = 3*DES_KEY_SIZE, |
13802005 NR |
1083 | .max_keysize = 3*DES_KEY_SIZE, |
1084 | .ivsize = DES_BLOCK_SIZE, | |
1085 | .setkey = atmel_tdes_setkey, | |
1086 | .encrypt = atmel_tdes_ofb_encrypt, | |
1087 | .decrypt = atmel_tdes_ofb_decrypt, | |
1088 | } | |
1089 | }, | |
1090 | }; | |
1091 | ||
1092 | static void atmel_tdes_queue_task(unsigned long data) | |
1093 | { | |
1094 | struct atmel_tdes_dev *dd = (struct atmel_tdes_dev *)data; | |
1095 | ||
1096 | atmel_tdes_handle_queue(dd, NULL); | |
1097 | } | |
1098 | ||
1099 | static void atmel_tdes_done_task(unsigned long data) | |
1100 | { | |
1101 | struct atmel_tdes_dev *dd = (struct atmel_tdes_dev *) data; | |
1102 | int err; | |
1103 | ||
1f858040 NR |
1104 | if (!(dd->flags & TDES_FLAGS_DMA)) |
1105 | err = atmel_tdes_crypt_pdc_stop(dd); | |
1106 | else | |
1107 | err = atmel_tdes_crypt_dma_stop(dd); | |
13802005 NR |
1108 | |
1109 | err = dd->err ? : err; | |
1110 | ||
1111 | if (dd->total && !err) { | |
1f858040 NR |
1112 | if (dd->flags & TDES_FLAGS_FAST) { |
1113 | dd->in_sg = sg_next(dd->in_sg); | |
1114 | dd->out_sg = sg_next(dd->out_sg); | |
1115 | if (!dd->in_sg || !dd->out_sg) | |
1116 | err = -EINVAL; | |
1117 | } | |
13802005 | 1118 | if (!err) |
1f858040 NR |
1119 | err = atmel_tdes_crypt_start(dd); |
1120 | if (!err) | |
1121 | return; /* DMA started. Not fininishing. */ | |
13802005 NR |
1122 | } |
1123 | ||
1124 | atmel_tdes_finish_req(dd, err); | |
1125 | atmel_tdes_handle_queue(dd, NULL); | |
1126 | } | |
1127 | ||
1128 | static irqreturn_t atmel_tdes_irq(int irq, void *dev_id) | |
1129 | { | |
1130 | struct atmel_tdes_dev *tdes_dd = dev_id; | |
1131 | u32 reg; | |
1132 | ||
1133 | reg = atmel_tdes_read(tdes_dd, TDES_ISR); | |
1134 | if (reg & atmel_tdes_read(tdes_dd, TDES_IMR)) { | |
1135 | atmel_tdes_write(tdes_dd, TDES_IDR, reg); | |
1136 | if (TDES_FLAGS_BUSY & tdes_dd->flags) | |
1137 | tasklet_schedule(&tdes_dd->done_task); | |
1138 | else | |
1139 | dev_warn(tdes_dd->dev, "TDES interrupt when no active requests.\n"); | |
1140 | return IRQ_HANDLED; | |
1141 | } | |
1142 | ||
1143 | return IRQ_NONE; | |
1144 | } | |
1145 | ||
1146 | static void atmel_tdes_unregister_algs(struct atmel_tdes_dev *dd) | |
1147 | { | |
1148 | int i; | |
1149 | ||
1150 | for (i = 0; i < ARRAY_SIZE(tdes_algs); i++) | |
1151 | crypto_unregister_alg(&tdes_algs[i]); | |
1152 | } | |
1153 | ||
1154 | static int atmel_tdes_register_algs(struct atmel_tdes_dev *dd) | |
1155 | { | |
1156 | int err, i, j; | |
1157 | ||
1158 | for (i = 0; i < ARRAY_SIZE(tdes_algs); i++) { | |
13802005 NR |
1159 | err = crypto_register_alg(&tdes_algs[i]); |
1160 | if (err) | |
1161 | goto err_tdes_algs; | |
1162 | } | |
1163 | ||
1164 | return 0; | |
1165 | ||
1166 | err_tdes_algs: | |
1167 | for (j = 0; j < i; j++) | |
1168 | crypto_unregister_alg(&tdes_algs[j]); | |
1169 | ||
1170 | return err; | |
1171 | } | |
1172 | ||
1f858040 NR |
1173 | static void atmel_tdes_get_cap(struct atmel_tdes_dev *dd) |
1174 | { | |
1175 | ||
1176 | dd->caps.has_dma = 0; | |
1177 | dd->caps.has_cfb_3keys = 0; | |
1178 | ||
1179 | /* keep only major version number */ | |
1180 | switch (dd->hw_version & 0xf00) { | |
1181 | case 0x700: | |
1182 | dd->caps.has_dma = 1; | |
1183 | dd->caps.has_cfb_3keys = 1; | |
1184 | break; | |
1185 | case 0x600: | |
1186 | break; | |
1187 | default: | |
1188 | dev_warn(dd->dev, | |
1189 | "Unmanaged tdes version, set minimum capabilities\n"); | |
1190 | break; | |
1191 | } | |
1192 | } | |
1193 | ||
84c8976b NF |
1194 | #if defined(CONFIG_OF) |
1195 | static const struct of_device_id atmel_tdes_dt_ids[] = { | |
1196 | { .compatible = "atmel,at91sam9g46-tdes" }, | |
1197 | { /* sentinel */ } | |
1198 | }; | |
1199 | MODULE_DEVICE_TABLE(of, atmel_tdes_dt_ids); | |
1200 | ||
1201 | static struct crypto_platform_data *atmel_tdes_of_init(struct platform_device *pdev) | |
1202 | { | |
1203 | struct device_node *np = pdev->dev.of_node; | |
1204 | struct crypto_platform_data *pdata; | |
1205 | ||
1206 | if (!np) { | |
1207 | dev_err(&pdev->dev, "device node not found\n"); | |
1208 | return ERR_PTR(-EINVAL); | |
1209 | } | |
1210 | ||
1211 | pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); | |
02684839 | 1212 | if (!pdata) |
84c8976b | 1213 | return ERR_PTR(-ENOMEM); |
84c8976b NF |
1214 | |
1215 | pdata->dma_slave = devm_kzalloc(&pdev->dev, | |
1216 | sizeof(*(pdata->dma_slave)), | |
1217 | GFP_KERNEL); | |
02684839 | 1218 | if (!pdata->dma_slave) |
84c8976b | 1219 | return ERR_PTR(-ENOMEM); |
84c8976b NF |
1220 | |
1221 | return pdata; | |
1222 | } | |
1223 | #else /* CONFIG_OF */ | |
1224 | static inline struct crypto_platform_data *atmel_tdes_of_init(struct platform_device *pdev) | |
1225 | { | |
1226 | return ERR_PTR(-EINVAL); | |
1227 | } | |
1228 | #endif | |
1229 | ||
49cfe4db | 1230 | static int atmel_tdes_probe(struct platform_device *pdev) |
13802005 NR |
1231 | { |
1232 | struct atmel_tdes_dev *tdes_dd; | |
1f858040 | 1233 | struct crypto_platform_data *pdata; |
13802005 NR |
1234 | struct device *dev = &pdev->dev; |
1235 | struct resource *tdes_res; | |
13802005 NR |
1236 | int err; |
1237 | ||
c659d07f | 1238 | tdes_dd = devm_kmalloc(&pdev->dev, sizeof(*tdes_dd), GFP_KERNEL); |
13802005 | 1239 | if (tdes_dd == NULL) { |
13802005 NR |
1240 | err = -ENOMEM; |
1241 | goto tdes_dd_err; | |
1242 | } | |
1243 | ||
1244 | tdes_dd->dev = dev; | |
1245 | ||
1246 | platform_set_drvdata(pdev, tdes_dd); | |
1247 | ||
1248 | INIT_LIST_HEAD(&tdes_dd->list); | |
1d1b9163 | 1249 | spin_lock_init(&tdes_dd->lock); |
13802005 NR |
1250 | |
1251 | tasklet_init(&tdes_dd->done_task, atmel_tdes_done_task, | |
1252 | (unsigned long)tdes_dd); | |
1253 | tasklet_init(&tdes_dd->queue_task, atmel_tdes_queue_task, | |
1254 | (unsigned long)tdes_dd); | |
1255 | ||
1256 | crypto_init_queue(&tdes_dd->queue, ATMEL_TDES_QUEUE_LENGTH); | |
1257 | ||
13802005 NR |
1258 | /* Get the base address */ |
1259 | tdes_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1260 | if (!tdes_res) { | |
1261 | dev_err(dev, "no MEM resource info\n"); | |
1262 | err = -ENODEV; | |
1263 | goto res_err; | |
1264 | } | |
1265 | tdes_dd->phys_base = tdes_res->start; | |
13802005 NR |
1266 | |
1267 | /* Get the IRQ */ | |
1268 | tdes_dd->irq = platform_get_irq(pdev, 0); | |
1269 | if (tdes_dd->irq < 0) { | |
13802005 NR |
1270 | err = tdes_dd->irq; |
1271 | goto res_err; | |
1272 | } | |
1273 | ||
b0e8b341 LC |
1274 | err = devm_request_irq(&pdev->dev, tdes_dd->irq, atmel_tdes_irq, |
1275 | IRQF_SHARED, "atmel-tdes", tdes_dd); | |
13802005 NR |
1276 | if (err) { |
1277 | dev_err(dev, "unable to request tdes irq.\n"); | |
b0e8b341 | 1278 | goto res_err; |
13802005 NR |
1279 | } |
1280 | ||
1281 | /* Initializing the clock */ | |
b0e8b341 | 1282 | tdes_dd->iclk = devm_clk_get(&pdev->dev, "tdes_clk"); |
13802005 | 1283 | if (IS_ERR(tdes_dd->iclk)) { |
be208356 | 1284 | dev_err(dev, "clock initialization failed.\n"); |
13802005 | 1285 | err = PTR_ERR(tdes_dd->iclk); |
b0e8b341 | 1286 | goto res_err; |
13802005 NR |
1287 | } |
1288 | ||
b0e8b341 | 1289 | tdes_dd->io_base = devm_ioremap_resource(&pdev->dev, tdes_res); |
9b52d55f | 1290 | if (IS_ERR(tdes_dd->io_base)) { |
13802005 | 1291 | dev_err(dev, "can't ioremap\n"); |
9b52d55f | 1292 | err = PTR_ERR(tdes_dd->io_base); |
b0e8b341 | 1293 | goto res_err; |
13802005 NR |
1294 | } |
1295 | ||
1f858040 NR |
1296 | atmel_tdes_hw_version_init(tdes_dd); |
1297 | ||
1298 | atmel_tdes_get_cap(tdes_dd); | |
1299 | ||
1300 | err = atmel_tdes_buff_init(tdes_dd); | |
13802005 | 1301 | if (err) |
1f858040 NR |
1302 | goto err_tdes_buff; |
1303 | ||
1304 | if (tdes_dd->caps.has_dma) { | |
1305 | pdata = pdev->dev.platform_data; | |
1306 | if (!pdata) { | |
84c8976b NF |
1307 | pdata = atmel_tdes_of_init(pdev); |
1308 | if (IS_ERR(pdata)) { | |
1309 | dev_err(&pdev->dev, "platform data not available\n"); | |
1310 | err = PTR_ERR(pdata); | |
1311 | goto err_pdata; | |
1312 | } | |
1313 | } | |
1314 | if (!pdata->dma_slave) { | |
1f858040 NR |
1315 | err = -ENXIO; |
1316 | goto err_pdata; | |
1317 | } | |
1318 | err = atmel_tdes_dma_init(tdes_dd, pdata); | |
1319 | if (err) | |
1320 | goto err_tdes_dma; | |
84c8976b NF |
1321 | |
1322 | dev_info(dev, "using %s, %s for DMA transfers\n", | |
1323 | dma_chan_name(tdes_dd->dma_lch_in.chan), | |
1324 | dma_chan_name(tdes_dd->dma_lch_out.chan)); | |
1f858040 | 1325 | } |
13802005 NR |
1326 | |
1327 | spin_lock(&atmel_tdes.lock); | |
1328 | list_add_tail(&tdes_dd->list, &atmel_tdes.dev_list); | |
1329 | spin_unlock(&atmel_tdes.lock); | |
1330 | ||
1331 | err = atmel_tdes_register_algs(tdes_dd); | |
1332 | if (err) | |
1333 | goto err_algs; | |
1334 | ||
1335 | dev_info(dev, "Atmel DES/TDES\n"); | |
1336 | ||
1337 | return 0; | |
1338 | ||
1339 | err_algs: | |
1340 | spin_lock(&atmel_tdes.lock); | |
1341 | list_del(&tdes_dd->list); | |
1342 | spin_unlock(&atmel_tdes.lock); | |
1f858040 NR |
1343 | if (tdes_dd->caps.has_dma) |
1344 | atmel_tdes_dma_cleanup(tdes_dd); | |
13802005 | 1345 | err_tdes_dma: |
1f858040 NR |
1346 | err_pdata: |
1347 | atmel_tdes_buff_cleanup(tdes_dd); | |
1348 | err_tdes_buff: | |
13802005 NR |
1349 | res_err: |
1350 | tasklet_kill(&tdes_dd->done_task); | |
1351 | tasklet_kill(&tdes_dd->queue_task); | |
13802005 NR |
1352 | tdes_dd_err: |
1353 | dev_err(dev, "initialization failed.\n"); | |
1354 | ||
1355 | return err; | |
1356 | } | |
1357 | ||
49cfe4db | 1358 | static int atmel_tdes_remove(struct platform_device *pdev) |
13802005 | 1359 | { |
47f1241e | 1360 | struct atmel_tdes_dev *tdes_dd; |
13802005 NR |
1361 | |
1362 | tdes_dd = platform_get_drvdata(pdev); | |
1363 | if (!tdes_dd) | |
1364 | return -ENODEV; | |
1365 | spin_lock(&atmel_tdes.lock); | |
1366 | list_del(&tdes_dd->list); | |
1367 | spin_unlock(&atmel_tdes.lock); | |
1368 | ||
1369 | atmel_tdes_unregister_algs(tdes_dd); | |
1370 | ||
1371 | tasklet_kill(&tdes_dd->done_task); | |
1372 | tasklet_kill(&tdes_dd->queue_task); | |
1373 | ||
1f858040 NR |
1374 | if (tdes_dd->caps.has_dma) |
1375 | atmel_tdes_dma_cleanup(tdes_dd); | |
1376 | ||
1377 | atmel_tdes_buff_cleanup(tdes_dd); | |
13802005 | 1378 | |
13802005 NR |
1379 | return 0; |
1380 | } | |
1381 | ||
1382 | static struct platform_driver atmel_tdes_driver = { | |
1383 | .probe = atmel_tdes_probe, | |
49cfe4db | 1384 | .remove = atmel_tdes_remove, |
13802005 NR |
1385 | .driver = { |
1386 | .name = "atmel_tdes", | |
84c8976b | 1387 | .of_match_table = of_match_ptr(atmel_tdes_dt_ids), |
13802005 NR |
1388 | }, |
1389 | }; | |
1390 | ||
1391 | module_platform_driver(atmel_tdes_driver); | |
1392 | ||
1393 | MODULE_DESCRIPTION("Atmel DES/TDES hw acceleration support."); | |
1394 | MODULE_LICENSE("GPL v2"); | |
1395 | MODULE_AUTHOR("Nicolas Royer - Eukréa Electromatique"); |