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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> | |
b46f36c0 | 24 | #include <linux/dmaengine.h> |
13802005 NR |
25 | #include <linux/init.h> |
26 | #include <linux/errno.h> | |
27 | #include <linux/interrupt.h> | |
13802005 | 28 | #include <linux/irq.h> |
13802005 NR |
29 | #include <linux/scatterlist.h> |
30 | #include <linux/dma-mapping.h> | |
84c8976b | 31 | #include <linux/of_device.h> |
13802005 NR |
32 | #include <linux/delay.h> |
33 | #include <linux/crypto.h> | |
13802005 NR |
34 | #include <crypto/scatterwalk.h> |
35 | #include <crypto/algapi.h> | |
92c203e2 | 36 | #include <crypto/internal/des.h> |
967d4910 | 37 | #include <crypto/internal/skcipher.h> |
13802005 NR |
38 | #include "atmel-tdes-regs.h" |
39 | ||
7c783029 TA |
40 | #define ATMEL_TDES_PRIORITY 300 |
41 | ||
13802005 | 42 | /* TDES flags */ |
848572f8 TA |
43 | /* Reserve bits [17:16], [13:12], [2:0] for AES Mode Register */ |
44 | #define TDES_FLAGS_ENCRYPT TDES_MR_CYPHER_ENC | |
45 | #define TDES_FLAGS_OPMODE_MASK (TDES_MR_OPMOD_MASK | TDES_MR_CFBS_MASK) | |
46 | #define TDES_FLAGS_ECB TDES_MR_OPMOD_ECB | |
47 | #define TDES_FLAGS_CBC TDES_MR_OPMOD_CBC | |
48 | #define TDES_FLAGS_OFB TDES_MR_OPMOD_OFB | |
49 | #define TDES_FLAGS_CFB64 (TDES_MR_OPMOD_CFB | TDES_MR_CFBS_64b) | |
50 | #define TDES_FLAGS_CFB32 (TDES_MR_OPMOD_CFB | TDES_MR_CFBS_32b) | |
51 | #define TDES_FLAGS_CFB16 (TDES_MR_OPMOD_CFB | TDES_MR_CFBS_16b) | |
52 | #define TDES_FLAGS_CFB8 (TDES_MR_OPMOD_CFB | TDES_MR_CFBS_8b) | |
53 | ||
54 | #define TDES_FLAGS_MODE_MASK (TDES_FLAGS_OPMODE_MASK | TDES_FLAGS_ENCRYPT) | |
55 | ||
56 | #define TDES_FLAGS_INIT BIT(3) | |
57 | #define TDES_FLAGS_FAST BIT(4) | |
58 | #define TDES_FLAGS_BUSY BIT(5) | |
59 | #define TDES_FLAGS_DMA BIT(6) | |
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; | |
967d4910 | 78 | u32 key[DES3_EDE_KEY_SIZE / sizeof(u32)]; |
13802005 | 79 | unsigned long flags; |
1f858040 NR |
80 | |
81 | u16 block_size; | |
13802005 NR |
82 | }; |
83 | ||
84 | struct atmel_tdes_reqctx { | |
85 | unsigned long mode; | |
61b0dd66 | 86 | u8 lastc[DES_BLOCK_SIZE]; |
13802005 NR |
87 | }; |
88 | ||
1f858040 NR |
89 | struct atmel_tdes_dma { |
90 | struct dma_chan *chan; | |
91 | struct dma_slave_config dma_conf; | |
92 | }; | |
93 | ||
13802005 NR |
94 | struct atmel_tdes_dev { |
95 | struct list_head list; | |
96 | unsigned long phys_base; | |
97 | void __iomem *io_base; | |
98 | ||
99 | struct atmel_tdes_ctx *ctx; | |
100 | struct device *dev; | |
101 | struct clk *iclk; | |
102 | int irq; | |
103 | ||
104 | unsigned long flags; | |
13802005 NR |
105 | |
106 | spinlock_t lock; | |
107 | struct crypto_queue queue; | |
108 | ||
109 | struct tasklet_struct done_task; | |
110 | struct tasklet_struct queue_task; | |
111 | ||
967d4910 | 112 | struct skcipher_request *req; |
13802005 NR |
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, | |
7b49fabf | 193 | const u32 *value, int count) |
13802005 NR |
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; | |
13802005 NR |
230 | } |
231 | ||
232 | return 0; | |
233 | } | |
234 | ||
1f858040 NR |
235 | static inline unsigned int atmel_tdes_get_version(struct atmel_tdes_dev *dd) |
236 | { | |
237 | return atmel_tdes_read(dd, TDES_HW_VERSION) & 0x00000fff; | |
238 | } | |
239 | ||
0efe58f3 | 240 | static int atmel_tdes_hw_version_init(struct atmel_tdes_dev *dd) |
1f858040 | 241 | { |
0efe58f3 TA |
242 | int err; |
243 | ||
244 | err = atmel_tdes_hw_init(dd); | |
245 | if (err) | |
246 | return err; | |
1f858040 NR |
247 | |
248 | dd->hw_version = atmel_tdes_get_version(dd); | |
249 | ||
250 | dev_info(dd->dev, | |
251 | "version: 0x%x\n", dd->hw_version); | |
252 | ||
253 | clk_disable_unprepare(dd->iclk); | |
0efe58f3 TA |
254 | |
255 | return 0; | |
1f858040 NR |
256 | } |
257 | ||
258 | static void atmel_tdes_dma_callback(void *data) | |
259 | { | |
260 | struct atmel_tdes_dev *dd = data; | |
261 | ||
262 | /* dma_lch_out - completed */ | |
263 | tasklet_schedule(&dd->done_task); | |
264 | } | |
265 | ||
13802005 NR |
266 | static int atmel_tdes_write_ctrl(struct atmel_tdes_dev *dd) |
267 | { | |
268 | int err; | |
7d0979e2 | 269 | u32 valmr = TDES_MR_SMOD_PDC; |
13802005 NR |
270 | |
271 | err = atmel_tdes_hw_init(dd); | |
272 | ||
273 | if (err) | |
274 | return err; | |
275 | ||
1f858040 NR |
276 | if (!dd->caps.has_dma) |
277 | atmel_tdes_write(dd, TDES_PTCR, | |
278 | TDES_PTCR_TXTDIS | TDES_PTCR_RXTDIS); | |
13802005 NR |
279 | |
280 | /* MR register must be set before IV registers */ | |
281 | if (dd->ctx->keylen > (DES_KEY_SIZE << 1)) { | |
282 | valmr |= TDES_MR_KEYMOD_3KEY; | |
283 | valmr |= TDES_MR_TDESMOD_TDES; | |
284 | } else if (dd->ctx->keylen > DES_KEY_SIZE) { | |
285 | valmr |= TDES_MR_KEYMOD_2KEY; | |
286 | valmr |= TDES_MR_TDESMOD_TDES; | |
287 | } else { | |
288 | valmr |= TDES_MR_TDESMOD_DES; | |
289 | } | |
290 | ||
848572f8 | 291 | valmr |= dd->flags & TDES_FLAGS_MODE_MASK; |
13802005 | 292 | |
13802005 NR |
293 | atmel_tdes_write(dd, TDES_MR, valmr); |
294 | ||
295 | atmel_tdes_write_n(dd, TDES_KEY1W1R, dd->ctx->key, | |
296 | dd->ctx->keylen >> 2); | |
297 | ||
848572f8 | 298 | if (dd->req->iv && (valmr & TDES_MR_OPMOD_MASK) != TDES_MR_OPMOD_ECB) |
967d4910 | 299 | atmel_tdes_write_n(dd, TDES_IV1R, (void *)dd->req->iv, 2); |
13802005 NR |
300 | |
301 | return 0; | |
302 | } | |
303 | ||
1f858040 | 304 | static int atmel_tdes_crypt_pdc_stop(struct atmel_tdes_dev *dd) |
13802005 NR |
305 | { |
306 | int err = 0; | |
307 | size_t count; | |
308 | ||
309 | atmel_tdes_write(dd, TDES_PTCR, TDES_PTCR_TXTDIS|TDES_PTCR_RXTDIS); | |
310 | ||
311 | if (dd->flags & TDES_FLAGS_FAST) { | |
312 | dma_unmap_sg(dd->dev, dd->out_sg, 1, DMA_FROM_DEVICE); | |
313 | dma_unmap_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE); | |
314 | } else { | |
315 | dma_sync_single_for_device(dd->dev, dd->dma_addr_out, | |
316 | dd->dma_size, DMA_FROM_DEVICE); | |
317 | ||
318 | /* copy data */ | |
319 | count = atmel_tdes_sg_copy(&dd->out_sg, &dd->out_offset, | |
320 | dd->buf_out, dd->buflen, dd->dma_size, 1); | |
321 | if (count != dd->dma_size) { | |
322 | err = -EINVAL; | |
4c147bcf | 323 | pr_err("not all data converted: %zu\n", count); |
13802005 NR |
324 | } |
325 | } | |
326 | ||
327 | return err; | |
328 | } | |
329 | ||
1f858040 | 330 | static int atmel_tdes_buff_init(struct atmel_tdes_dev *dd) |
13802005 NR |
331 | { |
332 | int err = -ENOMEM; | |
333 | ||
334 | dd->buf_in = (void *)__get_free_pages(GFP_KERNEL, 0); | |
335 | dd->buf_out = (void *)__get_free_pages(GFP_KERNEL, 0); | |
336 | dd->buflen = PAGE_SIZE; | |
337 | dd->buflen &= ~(DES_BLOCK_SIZE - 1); | |
338 | ||
339 | if (!dd->buf_in || !dd->buf_out) { | |
340 | dev_err(dd->dev, "unable to alloc pages.\n"); | |
341 | goto err_alloc; | |
342 | } | |
343 | ||
344 | /* MAP here */ | |
345 | dd->dma_addr_in = dma_map_single(dd->dev, dd->buf_in, | |
346 | dd->buflen, DMA_TO_DEVICE); | |
347 | if (dma_mapping_error(dd->dev, dd->dma_addr_in)) { | |
4c147bcf | 348 | dev_err(dd->dev, "dma %zd bytes error\n", dd->buflen); |
13802005 NR |
349 | err = -EINVAL; |
350 | goto err_map_in; | |
351 | } | |
352 | ||
353 | dd->dma_addr_out = dma_map_single(dd->dev, dd->buf_out, | |
354 | dd->buflen, DMA_FROM_DEVICE); | |
355 | if (dma_mapping_error(dd->dev, dd->dma_addr_out)) { | |
4c147bcf | 356 | dev_err(dd->dev, "dma %zd bytes error\n", dd->buflen); |
13802005 NR |
357 | err = -EINVAL; |
358 | goto err_map_out; | |
359 | } | |
360 | ||
361 | return 0; | |
362 | ||
363 | err_map_out: | |
364 | dma_unmap_single(dd->dev, dd->dma_addr_in, dd->buflen, | |
365 | DMA_TO_DEVICE); | |
366 | err_map_in: | |
088f628c | 367 | err_alloc: |
13802005 NR |
368 | free_page((unsigned long)dd->buf_out); |
369 | free_page((unsigned long)dd->buf_in); | |
13802005 NR |
370 | if (err) |
371 | pr_err("error: %d\n", err); | |
372 | return err; | |
373 | } | |
374 | ||
1f858040 | 375 | static void atmel_tdes_buff_cleanup(struct atmel_tdes_dev *dd) |
13802005 NR |
376 | { |
377 | dma_unmap_single(dd->dev, dd->dma_addr_out, dd->buflen, | |
378 | DMA_FROM_DEVICE); | |
379 | dma_unmap_single(dd->dev, dd->dma_addr_in, dd->buflen, | |
380 | DMA_TO_DEVICE); | |
381 | free_page((unsigned long)dd->buf_out); | |
382 | free_page((unsigned long)dd->buf_in); | |
383 | } | |
384 | ||
75eca7a7 TA |
385 | static int atmel_tdes_crypt_pdc(struct atmel_tdes_dev *dd, |
386 | dma_addr_t dma_addr_in, | |
387 | dma_addr_t dma_addr_out, int length) | |
13802005 | 388 | { |
848572f8 | 389 | struct atmel_tdes_reqctx *rctx = skcipher_request_ctx(dd->req); |
13802005 NR |
390 | int len32; |
391 | ||
392 | dd->dma_size = length; | |
393 | ||
394 | if (!(dd->flags & TDES_FLAGS_FAST)) { | |
395 | dma_sync_single_for_device(dd->dev, dma_addr_in, length, | |
396 | DMA_TO_DEVICE); | |
397 | } | |
398 | ||
848572f8 TA |
399 | switch (rctx->mode & TDES_FLAGS_OPMODE_MASK) { |
400 | case TDES_FLAGS_CFB8: | |
13802005 | 401 | len32 = DIV_ROUND_UP(length, sizeof(u8)); |
848572f8 TA |
402 | break; |
403 | ||
404 | case TDES_FLAGS_CFB16: | |
13802005 | 405 | len32 = DIV_ROUND_UP(length, sizeof(u16)); |
848572f8 TA |
406 | break; |
407 | ||
408 | default: | |
13802005 | 409 | len32 = DIV_ROUND_UP(length, sizeof(u32)); |
848572f8 TA |
410 | break; |
411 | } | |
13802005 NR |
412 | |
413 | atmel_tdes_write(dd, TDES_PTCR, TDES_PTCR_TXTDIS|TDES_PTCR_RXTDIS); | |
414 | atmel_tdes_write(dd, TDES_TPR, dma_addr_in); | |
415 | atmel_tdes_write(dd, TDES_TCR, len32); | |
416 | atmel_tdes_write(dd, TDES_RPR, dma_addr_out); | |
417 | atmel_tdes_write(dd, TDES_RCR, len32); | |
418 | ||
419 | /* Enable Interrupt */ | |
420 | atmel_tdes_write(dd, TDES_IER, TDES_INT_ENDRX); | |
421 | ||
422 | /* Start DMA transfer */ | |
423 | atmel_tdes_write(dd, TDES_PTCR, TDES_PTCR_TXTEN | TDES_PTCR_RXTEN); | |
424 | ||
425 | return 0; | |
426 | } | |
427 | ||
75eca7a7 TA |
428 | static int atmel_tdes_crypt_dma(struct atmel_tdes_dev *dd, |
429 | dma_addr_t dma_addr_in, | |
430 | dma_addr_t dma_addr_out, int length) | |
1f858040 | 431 | { |
848572f8 | 432 | struct atmel_tdes_reqctx *rctx = skcipher_request_ctx(dd->req); |
1f858040 NR |
433 | struct scatterlist sg[2]; |
434 | struct dma_async_tx_descriptor *in_desc, *out_desc; | |
848572f8 | 435 | enum dma_slave_buswidth addr_width; |
1f858040 NR |
436 | |
437 | dd->dma_size = length; | |
438 | ||
439 | if (!(dd->flags & TDES_FLAGS_FAST)) { | |
440 | dma_sync_single_for_device(dd->dev, dma_addr_in, length, | |
441 | DMA_TO_DEVICE); | |
442 | } | |
443 | ||
848572f8 TA |
444 | switch (rctx->mode & TDES_FLAGS_OPMODE_MASK) { |
445 | case TDES_FLAGS_CFB8: | |
446 | addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE; | |
447 | break; | |
448 | ||
449 | case TDES_FLAGS_CFB16: | |
450 | addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES; | |
451 | break; | |
452 | ||
453 | default: | |
454 | addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; | |
455 | break; | |
1f858040 NR |
456 | } |
457 | ||
848572f8 TA |
458 | dd->dma_lch_in.dma_conf.dst_addr_width = addr_width; |
459 | dd->dma_lch_out.dma_conf.src_addr_width = addr_width; | |
460 | ||
1f858040 NR |
461 | dmaengine_slave_config(dd->dma_lch_in.chan, &dd->dma_lch_in.dma_conf); |
462 | dmaengine_slave_config(dd->dma_lch_out.chan, &dd->dma_lch_out.dma_conf); | |
463 | ||
464 | dd->flags |= TDES_FLAGS_DMA; | |
465 | ||
466 | sg_init_table(&sg[0], 1); | |
467 | sg_dma_address(&sg[0]) = dma_addr_in; | |
468 | sg_dma_len(&sg[0]) = length; | |
469 | ||
470 | sg_init_table(&sg[1], 1); | |
471 | sg_dma_address(&sg[1]) = dma_addr_out; | |
472 | sg_dma_len(&sg[1]) = length; | |
473 | ||
474 | in_desc = dmaengine_prep_slave_sg(dd->dma_lch_in.chan, &sg[0], | |
475 | 1, DMA_MEM_TO_DEV, | |
476 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); | |
477 | if (!in_desc) | |
478 | return -EINVAL; | |
479 | ||
480 | out_desc = dmaengine_prep_slave_sg(dd->dma_lch_out.chan, &sg[1], | |
481 | 1, DMA_DEV_TO_MEM, | |
482 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); | |
483 | if (!out_desc) | |
484 | return -EINVAL; | |
485 | ||
486 | out_desc->callback = atmel_tdes_dma_callback; | |
487 | out_desc->callback_param = dd; | |
488 | ||
489 | dmaengine_submit(out_desc); | |
490 | dma_async_issue_pending(dd->dma_lch_out.chan); | |
491 | ||
492 | dmaengine_submit(in_desc); | |
493 | dma_async_issue_pending(dd->dma_lch_in.chan); | |
494 | ||
495 | return 0; | |
496 | } | |
497 | ||
498 | static int atmel_tdes_crypt_start(struct atmel_tdes_dev *dd) | |
13802005 | 499 | { |
13802005 NR |
500 | int err, fast = 0, in, out; |
501 | size_t count; | |
502 | dma_addr_t addr_in, addr_out; | |
503 | ||
1f858040 | 504 | if ((!dd->in_offset) && (!dd->out_offset)) { |
13802005 | 505 | /* check for alignment */ |
1f858040 NR |
506 | in = IS_ALIGNED((u32)dd->in_sg->offset, sizeof(u32)) && |
507 | IS_ALIGNED(dd->in_sg->length, dd->ctx->block_size); | |
508 | out = IS_ALIGNED((u32)dd->out_sg->offset, sizeof(u32)) && | |
509 | IS_ALIGNED(dd->out_sg->length, dd->ctx->block_size); | |
13802005 | 510 | fast = in && out; |
1f858040 NR |
511 | |
512 | if (sg_dma_len(dd->in_sg) != sg_dma_len(dd->out_sg)) | |
513 | fast = 0; | |
13802005 NR |
514 | } |
515 | ||
1f858040 | 516 | |
13802005 | 517 | if (fast) { |
4c147bcf AB |
518 | count = min_t(size_t, dd->total, sg_dma_len(dd->in_sg)); |
519 | count = min_t(size_t, count, sg_dma_len(dd->out_sg)); | |
13802005 | 520 | |
13802005 NR |
521 | err = dma_map_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE); |
522 | if (!err) { | |
523 | dev_err(dd->dev, "dma_map_sg() error\n"); | |
524 | return -EINVAL; | |
525 | } | |
526 | ||
527 | err = dma_map_sg(dd->dev, dd->out_sg, 1, | |
528 | DMA_FROM_DEVICE); | |
529 | if (!err) { | |
530 | dev_err(dd->dev, "dma_map_sg() error\n"); | |
531 | dma_unmap_sg(dd->dev, dd->in_sg, 1, | |
532 | DMA_TO_DEVICE); | |
533 | return -EINVAL; | |
534 | } | |
535 | ||
536 | addr_in = sg_dma_address(dd->in_sg); | |
537 | addr_out = sg_dma_address(dd->out_sg); | |
538 | ||
539 | dd->flags |= TDES_FLAGS_FAST; | |
540 | ||
541 | } else { | |
542 | /* use cache buffers */ | |
543 | count = atmel_tdes_sg_copy(&dd->in_sg, &dd->in_offset, | |
544 | dd->buf_in, dd->buflen, dd->total, 0); | |
545 | ||
546 | addr_in = dd->dma_addr_in; | |
547 | addr_out = dd->dma_addr_out; | |
548 | ||
549 | dd->flags &= ~TDES_FLAGS_FAST; | |
13802005 NR |
550 | } |
551 | ||
552 | dd->total -= count; | |
553 | ||
1f858040 | 554 | if (dd->caps.has_dma) |
75eca7a7 | 555 | err = atmel_tdes_crypt_dma(dd, addr_in, addr_out, count); |
1f858040 | 556 | else |
75eca7a7 | 557 | err = atmel_tdes_crypt_pdc(dd, addr_in, addr_out, count); |
1f858040 NR |
558 | |
559 | if (err && (dd->flags & TDES_FLAGS_FAST)) { | |
13802005 NR |
560 | dma_unmap_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE); |
561 | dma_unmap_sg(dd->dev, dd->out_sg, 1, DMA_TO_DEVICE); | |
562 | } | |
563 | ||
564 | return err; | |
565 | } | |
566 | ||
61b0dd66 TA |
567 | static void |
568 | atmel_tdes_set_iv_as_last_ciphertext_block(struct atmel_tdes_dev *dd) | |
569 | { | |
570 | struct skcipher_request *req = dd->req; | |
571 | struct atmel_tdes_reqctx *rctx = skcipher_request_ctx(req); | |
572 | struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req); | |
573 | unsigned int ivsize = crypto_skcipher_ivsize(skcipher); | |
574 | ||
575 | if (req->cryptlen < ivsize) | |
576 | return; | |
577 | ||
578 | if (rctx->mode & TDES_FLAGS_ENCRYPT) { | |
579 | scatterwalk_map_and_copy(req->iv, req->dst, | |
580 | req->cryptlen - ivsize, ivsize, 0); | |
581 | } else { | |
582 | if (req->src == req->dst) | |
583 | memcpy(req->iv, rctx->lastc, ivsize); | |
584 | else | |
585 | scatterwalk_map_and_copy(req->iv, req->src, | |
586 | req->cryptlen - ivsize, | |
587 | ivsize, 0); | |
588 | } | |
589 | } | |
590 | ||
13802005 NR |
591 | static void atmel_tdes_finish_req(struct atmel_tdes_dev *dd, int err) |
592 | { | |
967d4910 | 593 | struct skcipher_request *req = dd->req; |
c65d1237 | 594 | struct atmel_tdes_reqctx *rctx = skcipher_request_ctx(req); |
13802005 NR |
595 | |
596 | clk_disable_unprepare(dd->iclk); | |
597 | ||
598 | dd->flags &= ~TDES_FLAGS_BUSY; | |
599 | ||
27f4adf7 | 600 | if (!err && (rctx->mode & TDES_FLAGS_OPMODE_MASK) != TDES_FLAGS_ECB) |
c65d1237 | 601 | atmel_tdes_set_iv_as_last_ciphertext_block(dd); |
61b0dd66 | 602 | |
13802005 NR |
603 | req->base.complete(&req->base, err); |
604 | } | |
605 | ||
606 | static int atmel_tdes_handle_queue(struct atmel_tdes_dev *dd, | |
967d4910 | 607 | struct skcipher_request *req) |
13802005 NR |
608 | { |
609 | struct crypto_async_request *async_req, *backlog; | |
610 | struct atmel_tdes_ctx *ctx; | |
611 | struct atmel_tdes_reqctx *rctx; | |
612 | unsigned long flags; | |
613 | int err, ret = 0; | |
614 | ||
615 | spin_lock_irqsave(&dd->lock, flags); | |
616 | if (req) | |
967d4910 | 617 | ret = crypto_enqueue_request(&dd->queue, &req->base); |
13802005 NR |
618 | if (dd->flags & TDES_FLAGS_BUSY) { |
619 | spin_unlock_irqrestore(&dd->lock, flags); | |
620 | return ret; | |
621 | } | |
622 | backlog = crypto_get_backlog(&dd->queue); | |
623 | async_req = crypto_dequeue_request(&dd->queue); | |
624 | if (async_req) | |
625 | dd->flags |= TDES_FLAGS_BUSY; | |
626 | spin_unlock_irqrestore(&dd->lock, flags); | |
627 | ||
628 | if (!async_req) | |
629 | return ret; | |
630 | ||
631 | if (backlog) | |
632 | backlog->complete(backlog, -EINPROGRESS); | |
633 | ||
967d4910 | 634 | req = skcipher_request_cast(async_req); |
13802005 NR |
635 | |
636 | /* assign new request to device */ | |
637 | dd->req = req; | |
967d4910 | 638 | dd->total = req->cryptlen; |
13802005 NR |
639 | dd->in_offset = 0; |
640 | dd->in_sg = req->src; | |
641 | dd->out_offset = 0; | |
642 | dd->out_sg = req->dst; | |
643 | ||
967d4910 AB |
644 | rctx = skcipher_request_ctx(req); |
645 | ctx = crypto_skcipher_ctx(crypto_skcipher_reqtfm(req)); | |
13802005 NR |
646 | rctx->mode &= TDES_FLAGS_MODE_MASK; |
647 | dd->flags = (dd->flags & ~TDES_FLAGS_MODE_MASK) | rctx->mode; | |
648 | dd->ctx = ctx; | |
649 | ctx->dd = dd; | |
650 | ||
651 | err = atmel_tdes_write_ctrl(dd); | |
652 | if (!err) | |
1f858040 | 653 | err = atmel_tdes_crypt_start(dd); |
13802005 NR |
654 | if (err) { |
655 | /* des_task will not finish it, so do it here */ | |
656 | atmel_tdes_finish_req(dd, err); | |
657 | tasklet_schedule(&dd->queue_task); | |
658 | } | |
659 | ||
660 | return ret; | |
661 | } | |
662 | ||
1f858040 NR |
663 | static int atmel_tdes_crypt_dma_stop(struct atmel_tdes_dev *dd) |
664 | { | |
665 | int err = -EINVAL; | |
666 | size_t count; | |
667 | ||
668 | if (dd->flags & TDES_FLAGS_DMA) { | |
669 | err = 0; | |
670 | if (dd->flags & TDES_FLAGS_FAST) { | |
671 | dma_unmap_sg(dd->dev, dd->out_sg, 1, DMA_FROM_DEVICE); | |
672 | dma_unmap_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE); | |
673 | } else { | |
674 | dma_sync_single_for_device(dd->dev, dd->dma_addr_out, | |
675 | dd->dma_size, DMA_FROM_DEVICE); | |
676 | ||
677 | /* copy data */ | |
678 | count = atmel_tdes_sg_copy(&dd->out_sg, &dd->out_offset, | |
679 | dd->buf_out, dd->buflen, dd->dma_size, 1); | |
680 | if (count != dd->dma_size) { | |
681 | err = -EINVAL; | |
4c147bcf | 682 | pr_err("not all data converted: %zu\n", count); |
1f858040 NR |
683 | } |
684 | } | |
685 | } | |
686 | return err; | |
687 | } | |
13802005 | 688 | |
967d4910 | 689 | static int atmel_tdes_crypt(struct skcipher_request *req, unsigned long mode) |
13802005 | 690 | { |
61b0dd66 TA |
691 | struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req); |
692 | struct atmel_tdes_ctx *ctx = crypto_skcipher_ctx(skcipher); | |
967d4910 | 693 | struct atmel_tdes_reqctx *rctx = skcipher_request_ctx(req); |
13802005 | 694 | |
848572f8 TA |
695 | switch (mode & TDES_FLAGS_OPMODE_MASK) { |
696 | case TDES_FLAGS_CFB8: | |
967d4910 | 697 | if (!IS_ALIGNED(req->cryptlen, CFB8_BLOCK_SIZE)) { |
13802005 NR |
698 | pr_err("request size is not exact amount of CFB8 blocks\n"); |
699 | return -EINVAL; | |
700 | } | |
1f858040 | 701 | ctx->block_size = CFB8_BLOCK_SIZE; |
848572f8 TA |
702 | break; |
703 | ||
704 | case TDES_FLAGS_CFB16: | |
967d4910 | 705 | if (!IS_ALIGNED(req->cryptlen, CFB16_BLOCK_SIZE)) { |
13802005 NR |
706 | pr_err("request size is not exact amount of CFB16 blocks\n"); |
707 | return -EINVAL; | |
708 | } | |
1f858040 | 709 | ctx->block_size = CFB16_BLOCK_SIZE; |
848572f8 TA |
710 | break; |
711 | ||
712 | case TDES_FLAGS_CFB32: | |
967d4910 | 713 | if (!IS_ALIGNED(req->cryptlen, CFB32_BLOCK_SIZE)) { |
13802005 NR |
714 | pr_err("request size is not exact amount of CFB32 blocks\n"); |
715 | return -EINVAL; | |
716 | } | |
1f858040 | 717 | ctx->block_size = CFB32_BLOCK_SIZE; |
848572f8 TA |
718 | break; |
719 | ||
720 | default: | |
967d4910 | 721 | if (!IS_ALIGNED(req->cryptlen, DES_BLOCK_SIZE)) { |
1f858040 NR |
722 | pr_err("request size is not exact amount of DES blocks\n"); |
723 | return -EINVAL; | |
724 | } | |
725 | ctx->block_size = DES_BLOCK_SIZE; | |
848572f8 | 726 | break; |
13802005 NR |
727 | } |
728 | ||
1f858040 NR |
729 | rctx->mode = mode; |
730 | ||
c65d1237 TA |
731 | if ((mode & TDES_FLAGS_OPMODE_MASK) != TDES_FLAGS_ECB && |
732 | !(mode & TDES_FLAGS_ENCRYPT) && req->src == req->dst) { | |
61b0dd66 TA |
733 | unsigned int ivsize = crypto_skcipher_ivsize(skcipher); |
734 | ||
735 | if (req->cryptlen >= ivsize) | |
736 | scatterwalk_map_and_copy(rctx->lastc, req->src, | |
737 | req->cryptlen - ivsize, | |
738 | ivsize, 0); | |
739 | } | |
740 | ||
1f858040 NR |
741 | return atmel_tdes_handle_queue(ctx->dd, req); |
742 | } | |
743 | ||
827a98df | 744 | static int atmel_tdes_dma_init(struct atmel_tdes_dev *dd) |
1f858040 | 745 | { |
45a536e3 | 746 | int ret; |
84c8976b NF |
747 | |
748 | /* Try to grab 2 DMA channels */ | |
45a536e3 PU |
749 | dd->dma_lch_in.chan = dma_request_chan(dd->dev, "tx"); |
750 | if (IS_ERR(dd->dma_lch_in.chan)) { | |
751 | ret = PTR_ERR(dd->dma_lch_in.chan); | |
84c8976b | 752 | goto err_dma_in; |
45a536e3 | 753 | } |
84c8976b | 754 | |
84c8976b NF |
755 | dd->dma_lch_in.dma_conf.dst_addr = dd->phys_base + |
756 | TDES_IDATA1R; | |
757 | dd->dma_lch_in.dma_conf.src_maxburst = 1; | |
758 | dd->dma_lch_in.dma_conf.src_addr_width = | |
759 | DMA_SLAVE_BUSWIDTH_4_BYTES; | |
760 | dd->dma_lch_in.dma_conf.dst_maxburst = 1; | |
761 | dd->dma_lch_in.dma_conf.dst_addr_width = | |
762 | DMA_SLAVE_BUSWIDTH_4_BYTES; | |
763 | dd->dma_lch_in.dma_conf.device_fc = false; | |
764 | ||
45a536e3 PU |
765 | dd->dma_lch_out.chan = dma_request_chan(dd->dev, "rx"); |
766 | if (IS_ERR(dd->dma_lch_out.chan)) { | |
767 | ret = PTR_ERR(dd->dma_lch_out.chan); | |
84c8976b | 768 | goto err_dma_out; |
45a536e3 | 769 | } |
84c8976b | 770 | |
84c8976b NF |
771 | dd->dma_lch_out.dma_conf.src_addr = dd->phys_base + |
772 | TDES_ODATA1R; | |
773 | dd->dma_lch_out.dma_conf.src_maxburst = 1; | |
774 | dd->dma_lch_out.dma_conf.src_addr_width = | |
775 | DMA_SLAVE_BUSWIDTH_4_BYTES; | |
776 | dd->dma_lch_out.dma_conf.dst_maxburst = 1; | |
777 | dd->dma_lch_out.dma_conf.dst_addr_width = | |
778 | DMA_SLAVE_BUSWIDTH_4_BYTES; | |
779 | dd->dma_lch_out.dma_conf.device_fc = false; | |
1f858040 | 780 | |
84c8976b | 781 | return 0; |
13802005 | 782 | |
1f858040 NR |
783 | err_dma_out: |
784 | dma_release_channel(dd->dma_lch_in.chan); | |
785 | err_dma_in: | |
e9ce6aee | 786 | dev_err(dd->dev, "no DMA channel available\n"); |
45a536e3 | 787 | return ret; |
1f858040 | 788 | } |
13802005 | 789 | |
1f858040 NR |
790 | static void atmel_tdes_dma_cleanup(struct atmel_tdes_dev *dd) |
791 | { | |
792 | dma_release_channel(dd->dma_lch_in.chan); | |
793 | dma_release_channel(dd->dma_lch_out.chan); | |
13802005 NR |
794 | } |
795 | ||
967d4910 | 796 | static int atmel_des_setkey(struct crypto_skcipher *tfm, const u8 *key, |
13802005 NR |
797 | unsigned int keylen) |
798 | { | |
967d4910 | 799 | struct atmel_tdes_ctx *ctx = crypto_skcipher_ctx(tfm); |
92c203e2 | 800 | int err; |
13802005 | 801 | |
967d4910 | 802 | err = verify_skcipher_des_key(tfm, key); |
92c203e2 AB |
803 | if (err) |
804 | return err; | |
13802005 NR |
805 | |
806 | memcpy(ctx->key, key, keylen); | |
807 | ctx->keylen = keylen; | |
808 | ||
809 | return 0; | |
810 | } | |
811 | ||
967d4910 | 812 | static int atmel_tdes_setkey(struct crypto_skcipher *tfm, const u8 *key, |
13802005 NR |
813 | unsigned int keylen) |
814 | { | |
967d4910 | 815 | struct atmel_tdes_ctx *ctx = crypto_skcipher_ctx(tfm); |
52ea3cd2 | 816 | int err; |
13802005 | 817 | |
967d4910 | 818 | err = verify_skcipher_des3_key(tfm, key); |
92c203e2 | 819 | if (err) |
52ea3cd2 | 820 | return err; |
13802005 NR |
821 | |
822 | memcpy(ctx->key, key, keylen); | |
823 | ctx->keylen = keylen; | |
824 | ||
825 | return 0; | |
826 | } | |
827 | ||
967d4910 | 828 | static int atmel_tdes_ecb_encrypt(struct skcipher_request *req) |
13802005 | 829 | { |
848572f8 | 830 | return atmel_tdes_crypt(req, TDES_FLAGS_ECB | TDES_FLAGS_ENCRYPT); |
13802005 NR |
831 | } |
832 | ||
967d4910 | 833 | static int atmel_tdes_ecb_decrypt(struct skcipher_request *req) |
13802005 | 834 | { |
848572f8 | 835 | return atmel_tdes_crypt(req, TDES_FLAGS_ECB); |
13802005 NR |
836 | } |
837 | ||
967d4910 | 838 | static int atmel_tdes_cbc_encrypt(struct skcipher_request *req) |
13802005 | 839 | { |
848572f8 | 840 | return atmel_tdes_crypt(req, TDES_FLAGS_CBC | TDES_FLAGS_ENCRYPT); |
13802005 NR |
841 | } |
842 | ||
967d4910 | 843 | static int atmel_tdes_cbc_decrypt(struct skcipher_request *req) |
13802005 NR |
844 | { |
845 | return atmel_tdes_crypt(req, TDES_FLAGS_CBC); | |
846 | } | |
967d4910 | 847 | static int atmel_tdes_cfb_encrypt(struct skcipher_request *req) |
13802005 | 848 | { |
848572f8 | 849 | return atmel_tdes_crypt(req, TDES_FLAGS_CFB64 | TDES_FLAGS_ENCRYPT); |
13802005 NR |
850 | } |
851 | ||
967d4910 | 852 | static int atmel_tdes_cfb_decrypt(struct skcipher_request *req) |
13802005 | 853 | { |
848572f8 | 854 | return atmel_tdes_crypt(req, TDES_FLAGS_CFB64); |
13802005 NR |
855 | } |
856 | ||
967d4910 | 857 | static int atmel_tdes_cfb8_encrypt(struct skcipher_request *req) |
13802005 | 858 | { |
848572f8 | 859 | return atmel_tdes_crypt(req, TDES_FLAGS_CFB8 | TDES_FLAGS_ENCRYPT); |
13802005 NR |
860 | } |
861 | ||
967d4910 | 862 | static int atmel_tdes_cfb8_decrypt(struct skcipher_request *req) |
13802005 | 863 | { |
848572f8 | 864 | return atmel_tdes_crypt(req, TDES_FLAGS_CFB8); |
13802005 NR |
865 | } |
866 | ||
967d4910 | 867 | static int atmel_tdes_cfb16_encrypt(struct skcipher_request *req) |
13802005 | 868 | { |
848572f8 | 869 | return atmel_tdes_crypt(req, TDES_FLAGS_CFB16 | TDES_FLAGS_ENCRYPT); |
13802005 NR |
870 | } |
871 | ||
967d4910 | 872 | static int atmel_tdes_cfb16_decrypt(struct skcipher_request *req) |
13802005 | 873 | { |
848572f8 | 874 | return atmel_tdes_crypt(req, TDES_FLAGS_CFB16); |
13802005 NR |
875 | } |
876 | ||
967d4910 | 877 | static int atmel_tdes_cfb32_encrypt(struct skcipher_request *req) |
13802005 | 878 | { |
848572f8 | 879 | return atmel_tdes_crypt(req, TDES_FLAGS_CFB32 | TDES_FLAGS_ENCRYPT); |
13802005 NR |
880 | } |
881 | ||
967d4910 | 882 | static int atmel_tdes_cfb32_decrypt(struct skcipher_request *req) |
13802005 | 883 | { |
848572f8 | 884 | return atmel_tdes_crypt(req, TDES_FLAGS_CFB32); |
13802005 NR |
885 | } |
886 | ||
967d4910 | 887 | static int atmel_tdes_ofb_encrypt(struct skcipher_request *req) |
13802005 | 888 | { |
848572f8 | 889 | return atmel_tdes_crypt(req, TDES_FLAGS_OFB | TDES_FLAGS_ENCRYPT); |
13802005 NR |
890 | } |
891 | ||
967d4910 | 892 | static int atmel_tdes_ofb_decrypt(struct skcipher_request *req) |
13802005 NR |
893 | { |
894 | return atmel_tdes_crypt(req, TDES_FLAGS_OFB); | |
895 | } | |
896 | ||
967d4910 | 897 | static int atmel_tdes_init_tfm(struct crypto_skcipher *tfm) |
13802005 | 898 | { |
967d4910 | 899 | struct atmel_tdes_ctx *ctx = crypto_skcipher_ctx(tfm); |
1f858040 NR |
900 | struct atmel_tdes_dev *dd; |
901 | ||
967d4910 | 902 | crypto_skcipher_set_reqsize(tfm, sizeof(struct atmel_tdes_reqctx)); |
13802005 | 903 | |
1f858040 NR |
904 | dd = atmel_tdes_find_dev(ctx); |
905 | if (!dd) | |
906 | return -ENODEV; | |
907 | ||
13802005 NR |
908 | return 0; |
909 | } | |
910 | ||
aebe5bd7 TA |
911 | static void atmel_tdes_skcipher_alg_init(struct skcipher_alg *alg) |
912 | { | |
913 | alg->base.cra_priority = ATMEL_TDES_PRIORITY; | |
914 | alg->base.cra_flags = CRYPTO_ALG_ASYNC; | |
ed4424f2 | 915 | alg->base.cra_ctxsize = sizeof(struct atmel_tdes_ctx); |
aebe5bd7 TA |
916 | alg->base.cra_module = THIS_MODULE; |
917 | ||
918 | alg->init = atmel_tdes_init_tfm; | |
919 | } | |
920 | ||
967d4910 | 921 | static struct skcipher_alg tdes_algs[] = { |
13802005 | 922 | { |
967d4910 AB |
923 | .base.cra_name = "ecb(des)", |
924 | .base.cra_driver_name = "atmel-ecb-des", | |
967d4910 | 925 | .base.cra_blocksize = DES_BLOCK_SIZE, |
967d4910 | 926 | .base.cra_alignmask = 0x7, |
967d4910 | 927 | |
967d4910 AB |
928 | .min_keysize = DES_KEY_SIZE, |
929 | .max_keysize = DES_KEY_SIZE, | |
930 | .setkey = atmel_des_setkey, | |
931 | .encrypt = atmel_tdes_ecb_encrypt, | |
932 | .decrypt = atmel_tdes_ecb_decrypt, | |
13802005 NR |
933 | }, |
934 | { | |
967d4910 AB |
935 | .base.cra_name = "cbc(des)", |
936 | .base.cra_driver_name = "atmel-cbc-des", | |
967d4910 | 937 | .base.cra_blocksize = DES_BLOCK_SIZE, |
967d4910 | 938 | .base.cra_alignmask = 0x7, |
967d4910 | 939 | |
967d4910 AB |
940 | .min_keysize = DES_KEY_SIZE, |
941 | .max_keysize = DES_KEY_SIZE, | |
942 | .ivsize = DES_BLOCK_SIZE, | |
943 | .setkey = atmel_des_setkey, | |
944 | .encrypt = atmel_tdes_cbc_encrypt, | |
945 | .decrypt = atmel_tdes_cbc_decrypt, | |
13802005 NR |
946 | }, |
947 | { | |
967d4910 AB |
948 | .base.cra_name = "cfb(des)", |
949 | .base.cra_driver_name = "atmel-cfb-des", | |
967d4910 | 950 | .base.cra_blocksize = DES_BLOCK_SIZE, |
967d4910 | 951 | .base.cra_alignmask = 0x7, |
967d4910 | 952 | |
967d4910 AB |
953 | .min_keysize = DES_KEY_SIZE, |
954 | .max_keysize = DES_KEY_SIZE, | |
955 | .ivsize = DES_BLOCK_SIZE, | |
956 | .setkey = atmel_des_setkey, | |
957 | .encrypt = atmel_tdes_cfb_encrypt, | |
958 | .decrypt = atmel_tdes_cfb_decrypt, | |
13802005 NR |
959 | }, |
960 | { | |
967d4910 AB |
961 | .base.cra_name = "cfb8(des)", |
962 | .base.cra_driver_name = "atmel-cfb8-des", | |
967d4910 | 963 | .base.cra_blocksize = CFB8_BLOCK_SIZE, |
967d4910 | 964 | .base.cra_alignmask = 0, |
967d4910 | 965 | |
967d4910 AB |
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_cfb8_encrypt, | |
971 | .decrypt = atmel_tdes_cfb8_decrypt, | |
13802005 NR |
972 | }, |
973 | { | |
967d4910 AB |
974 | .base.cra_name = "cfb16(des)", |
975 | .base.cra_driver_name = "atmel-cfb16-des", | |
967d4910 | 976 | .base.cra_blocksize = CFB16_BLOCK_SIZE, |
967d4910 | 977 | .base.cra_alignmask = 0x1, |
967d4910 | 978 | |
967d4910 AB |
979 | .min_keysize = DES_KEY_SIZE, |
980 | .max_keysize = DES_KEY_SIZE, | |
981 | .ivsize = DES_BLOCK_SIZE, | |
982 | .setkey = atmel_des_setkey, | |
983 | .encrypt = atmel_tdes_cfb16_encrypt, | |
984 | .decrypt = atmel_tdes_cfb16_decrypt, | |
13802005 NR |
985 | }, |
986 | { | |
967d4910 AB |
987 | .base.cra_name = "cfb32(des)", |
988 | .base.cra_driver_name = "atmel-cfb32-des", | |
967d4910 | 989 | .base.cra_blocksize = CFB32_BLOCK_SIZE, |
967d4910 | 990 | .base.cra_alignmask = 0x3, |
967d4910 | 991 | |
967d4910 AB |
992 | .min_keysize = DES_KEY_SIZE, |
993 | .max_keysize = DES_KEY_SIZE, | |
994 | .ivsize = DES_BLOCK_SIZE, | |
995 | .setkey = atmel_des_setkey, | |
996 | .encrypt = atmel_tdes_cfb32_encrypt, | |
997 | .decrypt = atmel_tdes_cfb32_decrypt, | |
13802005 NR |
998 | }, |
999 | { | |
967d4910 AB |
1000 | .base.cra_name = "ofb(des)", |
1001 | .base.cra_driver_name = "atmel-ofb-des", | |
967d4910 | 1002 | .base.cra_blocksize = DES_BLOCK_SIZE, |
967d4910 | 1003 | .base.cra_alignmask = 0x7, |
967d4910 | 1004 | |
967d4910 AB |
1005 | .min_keysize = DES_KEY_SIZE, |
1006 | .max_keysize = DES_KEY_SIZE, | |
1007 | .ivsize = DES_BLOCK_SIZE, | |
1008 | .setkey = atmel_des_setkey, | |
1009 | .encrypt = atmel_tdes_ofb_encrypt, | |
1010 | .decrypt = atmel_tdes_ofb_decrypt, | |
13802005 NR |
1011 | }, |
1012 | { | |
967d4910 AB |
1013 | .base.cra_name = "ecb(des3_ede)", |
1014 | .base.cra_driver_name = "atmel-ecb-tdes", | |
967d4910 | 1015 | .base.cra_blocksize = DES_BLOCK_SIZE, |
967d4910 | 1016 | .base.cra_alignmask = 0x7, |
967d4910 | 1017 | |
967d4910 AB |
1018 | .min_keysize = DES3_EDE_KEY_SIZE, |
1019 | .max_keysize = DES3_EDE_KEY_SIZE, | |
1020 | .setkey = atmel_tdes_setkey, | |
1021 | .encrypt = atmel_tdes_ecb_encrypt, | |
1022 | .decrypt = atmel_tdes_ecb_decrypt, | |
13802005 NR |
1023 | }, |
1024 | { | |
967d4910 AB |
1025 | .base.cra_name = "cbc(des3_ede)", |
1026 | .base.cra_driver_name = "atmel-cbc-tdes", | |
967d4910 | 1027 | .base.cra_blocksize = DES_BLOCK_SIZE, |
967d4910 | 1028 | .base.cra_alignmask = 0x7, |
967d4910 | 1029 | |
967d4910 AB |
1030 | .min_keysize = DES3_EDE_KEY_SIZE, |
1031 | .max_keysize = DES3_EDE_KEY_SIZE, | |
1032 | .setkey = atmel_tdes_setkey, | |
1033 | .encrypt = atmel_tdes_cbc_encrypt, | |
1034 | .decrypt = atmel_tdes_cbc_decrypt, | |
1035 | .ivsize = DES_BLOCK_SIZE, | |
13802005 | 1036 | }, |
13802005 | 1037 | { |
967d4910 AB |
1038 | .base.cra_name = "ofb(des3_ede)", |
1039 | .base.cra_driver_name = "atmel-ofb-tdes", | |
967d4910 | 1040 | .base.cra_blocksize = DES_BLOCK_SIZE, |
967d4910 | 1041 | .base.cra_alignmask = 0x7, |
967d4910 | 1042 | |
967d4910 AB |
1043 | .min_keysize = DES3_EDE_KEY_SIZE, |
1044 | .max_keysize = DES3_EDE_KEY_SIZE, | |
1045 | .setkey = atmel_tdes_setkey, | |
1046 | .encrypt = atmel_tdes_ofb_encrypt, | |
1047 | .decrypt = atmel_tdes_ofb_decrypt, | |
1048 | .ivsize = DES_BLOCK_SIZE, | |
13802005 NR |
1049 | }, |
1050 | }; | |
1051 | ||
1052 | static void atmel_tdes_queue_task(unsigned long data) | |
1053 | { | |
1054 | struct atmel_tdes_dev *dd = (struct atmel_tdes_dev *)data; | |
1055 | ||
1056 | atmel_tdes_handle_queue(dd, NULL); | |
1057 | } | |
1058 | ||
1059 | static void atmel_tdes_done_task(unsigned long data) | |
1060 | { | |
1061 | struct atmel_tdes_dev *dd = (struct atmel_tdes_dev *) data; | |
1062 | int err; | |
1063 | ||
1f858040 NR |
1064 | if (!(dd->flags & TDES_FLAGS_DMA)) |
1065 | err = atmel_tdes_crypt_pdc_stop(dd); | |
1066 | else | |
1067 | err = atmel_tdes_crypt_dma_stop(dd); | |
13802005 | 1068 | |
13802005 | 1069 | if (dd->total && !err) { |
1f858040 NR |
1070 | if (dd->flags & TDES_FLAGS_FAST) { |
1071 | dd->in_sg = sg_next(dd->in_sg); | |
1072 | dd->out_sg = sg_next(dd->out_sg); | |
1073 | if (!dd->in_sg || !dd->out_sg) | |
1074 | err = -EINVAL; | |
1075 | } | |
13802005 | 1076 | if (!err) |
1f858040 NR |
1077 | err = atmel_tdes_crypt_start(dd); |
1078 | if (!err) | |
1079 | return; /* DMA started. Not fininishing. */ | |
13802005 NR |
1080 | } |
1081 | ||
1082 | atmel_tdes_finish_req(dd, err); | |
1083 | atmel_tdes_handle_queue(dd, NULL); | |
1084 | } | |
1085 | ||
1086 | static irqreturn_t atmel_tdes_irq(int irq, void *dev_id) | |
1087 | { | |
1088 | struct atmel_tdes_dev *tdes_dd = dev_id; | |
1089 | u32 reg; | |
1090 | ||
1091 | reg = atmel_tdes_read(tdes_dd, TDES_ISR); | |
1092 | if (reg & atmel_tdes_read(tdes_dd, TDES_IMR)) { | |
1093 | atmel_tdes_write(tdes_dd, TDES_IDR, reg); | |
1094 | if (TDES_FLAGS_BUSY & tdes_dd->flags) | |
1095 | tasklet_schedule(&tdes_dd->done_task); | |
1096 | else | |
1097 | dev_warn(tdes_dd->dev, "TDES interrupt when no active requests.\n"); | |
1098 | return IRQ_HANDLED; | |
1099 | } | |
1100 | ||
1101 | return IRQ_NONE; | |
1102 | } | |
1103 | ||
1104 | static void atmel_tdes_unregister_algs(struct atmel_tdes_dev *dd) | |
1105 | { | |
1106 | int i; | |
1107 | ||
1108 | for (i = 0; i < ARRAY_SIZE(tdes_algs); i++) | |
967d4910 | 1109 | crypto_unregister_skcipher(&tdes_algs[i]); |
13802005 NR |
1110 | } |
1111 | ||
1112 | static int atmel_tdes_register_algs(struct atmel_tdes_dev *dd) | |
1113 | { | |
1114 | int err, i, j; | |
1115 | ||
1116 | for (i = 0; i < ARRAY_SIZE(tdes_algs); i++) { | |
aebe5bd7 TA |
1117 | atmel_tdes_skcipher_alg_init(&tdes_algs[i]); |
1118 | ||
967d4910 | 1119 | err = crypto_register_skcipher(&tdes_algs[i]); |
13802005 NR |
1120 | if (err) |
1121 | goto err_tdes_algs; | |
1122 | } | |
1123 | ||
1124 | return 0; | |
1125 | ||
1126 | err_tdes_algs: | |
1127 | for (j = 0; j < i; j++) | |
967d4910 | 1128 | crypto_unregister_skcipher(&tdes_algs[j]); |
13802005 NR |
1129 | |
1130 | return err; | |
1131 | } | |
1132 | ||
1f858040 NR |
1133 | static void atmel_tdes_get_cap(struct atmel_tdes_dev *dd) |
1134 | { | |
1135 | ||
1136 | dd->caps.has_dma = 0; | |
1137 | dd->caps.has_cfb_3keys = 0; | |
1138 | ||
1139 | /* keep only major version number */ | |
1140 | switch (dd->hw_version & 0xf00) { | |
1141 | case 0x700: | |
1142 | dd->caps.has_dma = 1; | |
1143 | dd->caps.has_cfb_3keys = 1; | |
1144 | break; | |
1145 | case 0x600: | |
1146 | break; | |
1147 | default: | |
1148 | dev_warn(dd->dev, | |
1149 | "Unmanaged tdes version, set minimum capabilities\n"); | |
1150 | break; | |
1151 | } | |
1152 | } | |
1153 | ||
84c8976b NF |
1154 | #if defined(CONFIG_OF) |
1155 | static const struct of_device_id atmel_tdes_dt_ids[] = { | |
1156 | { .compatible = "atmel,at91sam9g46-tdes" }, | |
1157 | { /* sentinel */ } | |
1158 | }; | |
1159 | MODULE_DEVICE_TABLE(of, atmel_tdes_dt_ids); | |
84c8976b NF |
1160 | #endif |
1161 | ||
49cfe4db | 1162 | static int atmel_tdes_probe(struct platform_device *pdev) |
13802005 NR |
1163 | { |
1164 | struct atmel_tdes_dev *tdes_dd; | |
1165 | struct device *dev = &pdev->dev; | |
1166 | struct resource *tdes_res; | |
13802005 NR |
1167 | int err; |
1168 | ||
c659d07f | 1169 | tdes_dd = devm_kmalloc(&pdev->dev, sizeof(*tdes_dd), GFP_KERNEL); |
c9063a02 TA |
1170 | if (!tdes_dd) |
1171 | return -ENOMEM; | |
13802005 NR |
1172 | |
1173 | tdes_dd->dev = dev; | |
1174 | ||
1175 | platform_set_drvdata(pdev, tdes_dd); | |
1176 | ||
1177 | INIT_LIST_HEAD(&tdes_dd->list); | |
1d1b9163 | 1178 | spin_lock_init(&tdes_dd->lock); |
13802005 NR |
1179 | |
1180 | tasklet_init(&tdes_dd->done_task, atmel_tdes_done_task, | |
1181 | (unsigned long)tdes_dd); | |
1182 | tasklet_init(&tdes_dd->queue_task, atmel_tdes_queue_task, | |
1183 | (unsigned long)tdes_dd); | |
1184 | ||
1185 | crypto_init_queue(&tdes_dd->queue, ATMEL_TDES_QUEUE_LENGTH); | |
1186 | ||
13802005 NR |
1187 | /* Get the base address */ |
1188 | tdes_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1189 | if (!tdes_res) { | |
1190 | dev_err(dev, "no MEM resource info\n"); | |
1191 | err = -ENODEV; | |
e7836518 | 1192 | goto err_tasklet_kill; |
13802005 NR |
1193 | } |
1194 | tdes_dd->phys_base = tdes_res->start; | |
13802005 NR |
1195 | |
1196 | /* Get the IRQ */ | |
1197 | tdes_dd->irq = platform_get_irq(pdev, 0); | |
1198 | if (tdes_dd->irq < 0) { | |
13802005 | 1199 | err = tdes_dd->irq; |
e7836518 | 1200 | goto err_tasklet_kill; |
13802005 NR |
1201 | } |
1202 | ||
b0e8b341 LC |
1203 | err = devm_request_irq(&pdev->dev, tdes_dd->irq, atmel_tdes_irq, |
1204 | IRQF_SHARED, "atmel-tdes", tdes_dd); | |
13802005 NR |
1205 | if (err) { |
1206 | dev_err(dev, "unable to request tdes irq.\n"); | |
e7836518 | 1207 | goto err_tasklet_kill; |
13802005 NR |
1208 | } |
1209 | ||
1210 | /* Initializing the clock */ | |
b0e8b341 | 1211 | tdes_dd->iclk = devm_clk_get(&pdev->dev, "tdes_clk"); |
13802005 | 1212 | if (IS_ERR(tdes_dd->iclk)) { |
be208356 | 1213 | dev_err(dev, "clock initialization failed.\n"); |
13802005 | 1214 | err = PTR_ERR(tdes_dd->iclk); |
e7836518 | 1215 | goto err_tasklet_kill; |
13802005 NR |
1216 | } |
1217 | ||
b0e8b341 | 1218 | tdes_dd->io_base = devm_ioremap_resource(&pdev->dev, tdes_res); |
9b52d55f | 1219 | if (IS_ERR(tdes_dd->io_base)) { |
13802005 | 1220 | dev_err(dev, "can't ioremap\n"); |
9b52d55f | 1221 | err = PTR_ERR(tdes_dd->io_base); |
e7836518 | 1222 | goto err_tasklet_kill; |
13802005 NR |
1223 | } |
1224 | ||
0efe58f3 TA |
1225 | err = atmel_tdes_hw_version_init(tdes_dd); |
1226 | if (err) | |
e7836518 | 1227 | goto err_tasklet_kill; |
1f858040 NR |
1228 | |
1229 | atmel_tdes_get_cap(tdes_dd); | |
1230 | ||
1231 | err = atmel_tdes_buff_init(tdes_dd); | |
13802005 | 1232 | if (err) |
e7836518 | 1233 | goto err_tasklet_kill; |
1f858040 NR |
1234 | |
1235 | if (tdes_dd->caps.has_dma) { | |
827a98df | 1236 | err = atmel_tdes_dma_init(tdes_dd); |
1f858040 | 1237 | if (err) |
e7836518 | 1238 | goto err_buff_cleanup; |
84c8976b NF |
1239 | |
1240 | dev_info(dev, "using %s, %s for DMA transfers\n", | |
1241 | dma_chan_name(tdes_dd->dma_lch_in.chan), | |
1242 | dma_chan_name(tdes_dd->dma_lch_out.chan)); | |
1f858040 | 1243 | } |
13802005 NR |
1244 | |
1245 | spin_lock(&atmel_tdes.lock); | |
1246 | list_add_tail(&tdes_dd->list, &atmel_tdes.dev_list); | |
1247 | spin_unlock(&atmel_tdes.lock); | |
1248 | ||
1249 | err = atmel_tdes_register_algs(tdes_dd); | |
1250 | if (err) | |
1251 | goto err_algs; | |
1252 | ||
1253 | dev_info(dev, "Atmel DES/TDES\n"); | |
1254 | ||
1255 | return 0; | |
1256 | ||
1257 | err_algs: | |
1258 | spin_lock(&atmel_tdes.lock); | |
1259 | list_del(&tdes_dd->list); | |
1260 | spin_unlock(&atmel_tdes.lock); | |
1f858040 NR |
1261 | if (tdes_dd->caps.has_dma) |
1262 | atmel_tdes_dma_cleanup(tdes_dd); | |
e7836518 | 1263 | err_buff_cleanup: |
1f858040 | 1264 | atmel_tdes_buff_cleanup(tdes_dd); |
e7836518 | 1265 | err_tasklet_kill: |
13802005 NR |
1266 | tasklet_kill(&tdes_dd->done_task); |
1267 | tasklet_kill(&tdes_dd->queue_task); | |
13802005 NR |
1268 | |
1269 | return err; | |
1270 | } | |
1271 | ||
49cfe4db | 1272 | static int atmel_tdes_remove(struct platform_device *pdev) |
13802005 | 1273 | { |
47f1241e | 1274 | struct atmel_tdes_dev *tdes_dd; |
13802005 NR |
1275 | |
1276 | tdes_dd = platform_get_drvdata(pdev); | |
1277 | if (!tdes_dd) | |
1278 | return -ENODEV; | |
1279 | spin_lock(&atmel_tdes.lock); | |
1280 | list_del(&tdes_dd->list); | |
1281 | spin_unlock(&atmel_tdes.lock); | |
1282 | ||
1283 | atmel_tdes_unregister_algs(tdes_dd); | |
1284 | ||
1285 | tasklet_kill(&tdes_dd->done_task); | |
1286 | tasklet_kill(&tdes_dd->queue_task); | |
1287 | ||
1f858040 NR |
1288 | if (tdes_dd->caps.has_dma) |
1289 | atmel_tdes_dma_cleanup(tdes_dd); | |
1290 | ||
1291 | atmel_tdes_buff_cleanup(tdes_dd); | |
13802005 | 1292 | |
13802005 NR |
1293 | return 0; |
1294 | } | |
1295 | ||
1296 | static struct platform_driver atmel_tdes_driver = { | |
1297 | .probe = atmel_tdes_probe, | |
49cfe4db | 1298 | .remove = atmel_tdes_remove, |
13802005 NR |
1299 | .driver = { |
1300 | .name = "atmel_tdes", | |
84c8976b | 1301 | .of_match_table = of_match_ptr(atmel_tdes_dt_ids), |
13802005 NR |
1302 | }, |
1303 | }; | |
1304 | ||
1305 | module_platform_driver(atmel_tdes_driver); | |
1306 | ||
1307 | MODULE_DESCRIPTION("Atmel DES/TDES hw acceleration support."); | |
1308 | MODULE_LICENSE("GPL v2"); | |
1309 | MODULE_AUTHOR("Nicolas Royer - Eukréa Electromatique"); |