Commit | Line | Data |
---|---|---|
13802005 NR |
1 | /* |
2 | * Cryptographic API. | |
3 | * | |
4 | * Support for ATMEL DES/TDES HW acceleration. | |
5 | * | |
6 | * Copyright (c) 2012 Eukréa Electromatique - ATMEL | |
7 | * Author: Nicolas Royer <nicolas@eukrea.com> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as published | |
11 | * by the Free Software Foundation. | |
12 | * | |
13 | * Some ideas are from omap-aes.c drivers. | |
14 | */ | |
15 | ||
16 | ||
17 | #include <linux/kernel.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/slab.h> | |
20 | #include <linux/err.h> | |
21 | #include <linux/clk.h> | |
22 | #include <linux/io.h> | |
23 | #include <linux/hw_random.h> | |
24 | #include <linux/platform_device.h> | |
25 | ||
26 | #include <linux/device.h> | |
13802005 NR |
27 | #include <linux/init.h> |
28 | #include <linux/errno.h> | |
29 | #include <linux/interrupt.h> | |
13802005 | 30 | #include <linux/irq.h> |
13802005 NR |
31 | #include <linux/scatterlist.h> |
32 | #include <linux/dma-mapping.h> | |
84c8976b | 33 | #include <linux/of_device.h> |
13802005 NR |
34 | #include <linux/delay.h> |
35 | #include <linux/crypto.h> | |
36 | #include <linux/cryptohash.h> | |
37 | #include <crypto/scatterwalk.h> | |
38 | #include <crypto/algapi.h> | |
39 | #include <crypto/des.h> | |
40 | #include <crypto/hash.h> | |
41 | #include <crypto/internal/hash.h> | |
1f858040 | 42 | #include <linux/platform_data/crypto-atmel.h> |
13802005 NR |
43 | #include "atmel-tdes-regs.h" |
44 | ||
45 | /* TDES flags */ | |
1f858040 | 46 | #define TDES_FLAGS_MODE_MASK 0x00ff |
13802005 NR |
47 | #define TDES_FLAGS_ENCRYPT BIT(0) |
48 | #define TDES_FLAGS_CBC BIT(1) | |
49 | #define TDES_FLAGS_CFB BIT(2) | |
50 | #define TDES_FLAGS_CFB8 BIT(3) | |
51 | #define TDES_FLAGS_CFB16 BIT(4) | |
52 | #define TDES_FLAGS_CFB32 BIT(5) | |
1f858040 NR |
53 | #define TDES_FLAGS_CFB64 BIT(6) |
54 | #define TDES_FLAGS_OFB BIT(7) | |
13802005 NR |
55 | |
56 | #define TDES_FLAGS_INIT BIT(16) | |
57 | #define TDES_FLAGS_FAST BIT(17) | |
58 | #define TDES_FLAGS_BUSY BIT(18) | |
1f858040 | 59 | #define TDES_FLAGS_DMA BIT(19) |
13802005 | 60 | |
1f858040 | 61 | #define ATMEL_TDES_QUEUE_LENGTH 50 |
13802005 NR |
62 | |
63 | #define CFB8_BLOCK_SIZE 1 | |
64 | #define CFB16_BLOCK_SIZE 2 | |
65 | #define CFB32_BLOCK_SIZE 4 | |
13802005 | 66 | |
1f858040 NR |
67 | struct atmel_tdes_caps { |
68 | bool has_dma; | |
69 | u32 has_cfb_3keys; | |
70 | }; | |
13802005 NR |
71 | |
72 | struct atmel_tdes_dev; | |
73 | ||
74 | struct atmel_tdes_ctx { | |
75 | struct atmel_tdes_dev *dd; | |
76 | ||
77 | int keylen; | |
78 | u32 key[3*DES_KEY_SIZE / sizeof(u32)]; | |
79 | unsigned long flags; | |
1f858040 NR |
80 | |
81 | u16 block_size; | |
13802005 NR |
82 | }; |
83 | ||
84 | struct atmel_tdes_reqctx { | |
85 | unsigned long mode; | |
86 | }; | |
87 | ||
1f858040 NR |
88 | struct atmel_tdes_dma { |
89 | struct dma_chan *chan; | |
90 | struct dma_slave_config dma_conf; | |
91 | }; | |
92 | ||
13802005 NR |
93 | struct atmel_tdes_dev { |
94 | struct list_head list; | |
95 | unsigned long phys_base; | |
96 | void __iomem *io_base; | |
97 | ||
98 | struct atmel_tdes_ctx *ctx; | |
99 | struct device *dev; | |
100 | struct clk *iclk; | |
101 | int irq; | |
102 | ||
103 | unsigned long flags; | |
104 | int err; | |
105 | ||
106 | spinlock_t lock; | |
107 | struct crypto_queue queue; | |
108 | ||
109 | struct tasklet_struct done_task; | |
110 | struct tasklet_struct queue_task; | |
111 | ||
112 | struct ablkcipher_request *req; | |
113 | size_t total; | |
114 | ||
115 | struct scatterlist *in_sg; | |
1f858040 | 116 | unsigned int nb_in_sg; |
13802005 NR |
117 | size_t in_offset; |
118 | struct scatterlist *out_sg; | |
1f858040 | 119 | unsigned int nb_out_sg; |
13802005 NR |
120 | size_t out_offset; |
121 | ||
122 | size_t buflen; | |
123 | size_t dma_size; | |
124 | ||
125 | void *buf_in; | |
126 | int dma_in; | |
127 | dma_addr_t dma_addr_in; | |
1f858040 | 128 | struct atmel_tdes_dma dma_lch_in; |
13802005 NR |
129 | |
130 | void *buf_out; | |
131 | int dma_out; | |
132 | dma_addr_t dma_addr_out; | |
1f858040 NR |
133 | struct atmel_tdes_dma dma_lch_out; |
134 | ||
135 | struct atmel_tdes_caps caps; | |
136 | ||
137 | u32 hw_version; | |
13802005 NR |
138 | }; |
139 | ||
140 | struct atmel_tdes_drv { | |
141 | struct list_head dev_list; | |
142 | spinlock_t lock; | |
143 | }; | |
144 | ||
145 | static struct atmel_tdes_drv atmel_tdes = { | |
146 | .dev_list = LIST_HEAD_INIT(atmel_tdes.dev_list), | |
147 | .lock = __SPIN_LOCK_UNLOCKED(atmel_tdes.lock), | |
148 | }; | |
149 | ||
150 | static int atmel_tdes_sg_copy(struct scatterlist **sg, size_t *offset, | |
151 | void *buf, size_t buflen, size_t total, int out) | |
152 | { | |
153 | unsigned int count, off = 0; | |
154 | ||
155 | while (buflen && total) { | |
156 | count = min((*sg)->length - *offset, total); | |
157 | count = min(count, buflen); | |
158 | ||
159 | if (!count) | |
160 | return off; | |
161 | ||
162 | scatterwalk_map_and_copy(buf + off, *sg, *offset, count, out); | |
163 | ||
164 | off += count; | |
165 | buflen -= count; | |
166 | *offset += count; | |
167 | total -= count; | |
168 | ||
169 | if (*offset == (*sg)->length) { | |
170 | *sg = sg_next(*sg); | |
171 | if (*sg) | |
172 | *offset = 0; | |
173 | else | |
174 | total = 0; | |
175 | } | |
176 | } | |
177 | ||
178 | return off; | |
179 | } | |
180 | ||
181 | static inline u32 atmel_tdes_read(struct atmel_tdes_dev *dd, u32 offset) | |
182 | { | |
183 | return readl_relaxed(dd->io_base + offset); | |
184 | } | |
185 | ||
186 | static inline void atmel_tdes_write(struct atmel_tdes_dev *dd, | |
187 | u32 offset, u32 value) | |
188 | { | |
189 | writel_relaxed(value, dd->io_base + offset); | |
190 | } | |
191 | ||
192 | static void atmel_tdes_write_n(struct atmel_tdes_dev *dd, u32 offset, | |
193 | u32 *value, int count) | |
194 | { | |
195 | for (; count--; value++, offset += 4) | |
196 | atmel_tdes_write(dd, offset, *value); | |
197 | } | |
198 | ||
199 | static struct atmel_tdes_dev *atmel_tdes_find_dev(struct atmel_tdes_ctx *ctx) | |
200 | { | |
201 | struct atmel_tdes_dev *tdes_dd = NULL; | |
202 | struct atmel_tdes_dev *tmp; | |
203 | ||
204 | spin_lock_bh(&atmel_tdes.lock); | |
205 | if (!ctx->dd) { | |
206 | list_for_each_entry(tmp, &atmel_tdes.dev_list, list) { | |
207 | tdes_dd = tmp; | |
208 | break; | |
209 | } | |
210 | ctx->dd = tdes_dd; | |
211 | } else { | |
212 | tdes_dd = ctx->dd; | |
213 | } | |
214 | spin_unlock_bh(&atmel_tdes.lock); | |
215 | ||
216 | return tdes_dd; | |
217 | } | |
218 | ||
219 | static int atmel_tdes_hw_init(struct atmel_tdes_dev *dd) | |
220 | { | |
221 | clk_prepare_enable(dd->iclk); | |
222 | ||
223 | if (!(dd->flags & TDES_FLAGS_INIT)) { | |
224 | atmel_tdes_write(dd, TDES_CR, TDES_CR_SWRST); | |
225 | dd->flags |= TDES_FLAGS_INIT; | |
226 | dd->err = 0; | |
227 | } | |
228 | ||
229 | return 0; | |
230 | } | |
231 | ||
1f858040 NR |
232 | static inline unsigned int atmel_tdes_get_version(struct atmel_tdes_dev *dd) |
233 | { | |
234 | return atmel_tdes_read(dd, TDES_HW_VERSION) & 0x00000fff; | |
235 | } | |
236 | ||
237 | static void atmel_tdes_hw_version_init(struct atmel_tdes_dev *dd) | |
238 | { | |
239 | atmel_tdes_hw_init(dd); | |
240 | ||
241 | dd->hw_version = atmel_tdes_get_version(dd); | |
242 | ||
243 | dev_info(dd->dev, | |
244 | "version: 0x%x\n", dd->hw_version); | |
245 | ||
246 | clk_disable_unprepare(dd->iclk); | |
247 | } | |
248 | ||
249 | static void atmel_tdes_dma_callback(void *data) | |
250 | { | |
251 | struct atmel_tdes_dev *dd = data; | |
252 | ||
253 | /* dma_lch_out - completed */ | |
254 | tasklet_schedule(&dd->done_task); | |
255 | } | |
256 | ||
13802005 NR |
257 | static int atmel_tdes_write_ctrl(struct atmel_tdes_dev *dd) |
258 | { | |
259 | int err; | |
260 | u32 valcr = 0, valmr = TDES_MR_SMOD_PDC; | |
261 | ||
262 | err = atmel_tdes_hw_init(dd); | |
263 | ||
264 | if (err) | |
265 | return err; | |
266 | ||
1f858040 NR |
267 | if (!dd->caps.has_dma) |
268 | atmel_tdes_write(dd, TDES_PTCR, | |
269 | TDES_PTCR_TXTDIS | TDES_PTCR_RXTDIS); | |
13802005 NR |
270 | |
271 | /* MR register must be set before IV registers */ | |
272 | if (dd->ctx->keylen > (DES_KEY_SIZE << 1)) { | |
273 | valmr |= TDES_MR_KEYMOD_3KEY; | |
274 | valmr |= TDES_MR_TDESMOD_TDES; | |
275 | } else if (dd->ctx->keylen > DES_KEY_SIZE) { | |
276 | valmr |= TDES_MR_KEYMOD_2KEY; | |
277 | valmr |= TDES_MR_TDESMOD_TDES; | |
278 | } else { | |
279 | valmr |= TDES_MR_TDESMOD_DES; | |
280 | } | |
281 | ||
282 | if (dd->flags & TDES_FLAGS_CBC) { | |
283 | valmr |= TDES_MR_OPMOD_CBC; | |
284 | } else if (dd->flags & TDES_FLAGS_CFB) { | |
285 | valmr |= TDES_MR_OPMOD_CFB; | |
286 | ||
287 | if (dd->flags & TDES_FLAGS_CFB8) | |
288 | valmr |= TDES_MR_CFBS_8b; | |
289 | else if (dd->flags & TDES_FLAGS_CFB16) | |
290 | valmr |= TDES_MR_CFBS_16b; | |
291 | else if (dd->flags & TDES_FLAGS_CFB32) | |
292 | valmr |= TDES_MR_CFBS_32b; | |
1f858040 NR |
293 | else if (dd->flags & TDES_FLAGS_CFB64) |
294 | valmr |= TDES_MR_CFBS_64b; | |
13802005 NR |
295 | } else if (dd->flags & TDES_FLAGS_OFB) { |
296 | valmr |= TDES_MR_OPMOD_OFB; | |
297 | } | |
298 | ||
299 | if ((dd->flags & TDES_FLAGS_ENCRYPT) || (dd->flags & TDES_FLAGS_OFB)) | |
300 | valmr |= TDES_MR_CYPHER_ENC; | |
301 | ||
302 | atmel_tdes_write(dd, TDES_CR, valcr); | |
303 | atmel_tdes_write(dd, TDES_MR, valmr); | |
304 | ||
305 | atmel_tdes_write_n(dd, TDES_KEY1W1R, dd->ctx->key, | |
306 | dd->ctx->keylen >> 2); | |
307 | ||
308 | if (((dd->flags & TDES_FLAGS_CBC) || (dd->flags & TDES_FLAGS_CFB) || | |
309 | (dd->flags & TDES_FLAGS_OFB)) && dd->req->info) { | |
310 | atmel_tdes_write_n(dd, TDES_IV1R, dd->req->info, 2); | |
311 | } | |
312 | ||
313 | return 0; | |
314 | } | |
315 | ||
1f858040 | 316 | static int atmel_tdes_crypt_pdc_stop(struct atmel_tdes_dev *dd) |
13802005 NR |
317 | { |
318 | int err = 0; | |
319 | size_t count; | |
320 | ||
321 | atmel_tdes_write(dd, TDES_PTCR, TDES_PTCR_TXTDIS|TDES_PTCR_RXTDIS); | |
322 | ||
323 | if (dd->flags & TDES_FLAGS_FAST) { | |
324 | dma_unmap_sg(dd->dev, dd->out_sg, 1, DMA_FROM_DEVICE); | |
325 | dma_unmap_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE); | |
326 | } else { | |
327 | dma_sync_single_for_device(dd->dev, dd->dma_addr_out, | |
328 | dd->dma_size, DMA_FROM_DEVICE); | |
329 | ||
330 | /* copy data */ | |
331 | count = atmel_tdes_sg_copy(&dd->out_sg, &dd->out_offset, | |
332 | dd->buf_out, dd->buflen, dd->dma_size, 1); | |
333 | if (count != dd->dma_size) { | |
334 | err = -EINVAL; | |
335 | pr_err("not all data converted: %u\n", count); | |
336 | } | |
337 | } | |
338 | ||
339 | return err; | |
340 | } | |
341 | ||
1f858040 | 342 | static int atmel_tdes_buff_init(struct atmel_tdes_dev *dd) |
13802005 NR |
343 | { |
344 | int err = -ENOMEM; | |
345 | ||
346 | dd->buf_in = (void *)__get_free_pages(GFP_KERNEL, 0); | |
347 | dd->buf_out = (void *)__get_free_pages(GFP_KERNEL, 0); | |
348 | dd->buflen = PAGE_SIZE; | |
349 | dd->buflen &= ~(DES_BLOCK_SIZE - 1); | |
350 | ||
351 | if (!dd->buf_in || !dd->buf_out) { | |
352 | dev_err(dd->dev, "unable to alloc pages.\n"); | |
353 | goto err_alloc; | |
354 | } | |
355 | ||
356 | /* MAP here */ | |
357 | dd->dma_addr_in = dma_map_single(dd->dev, dd->buf_in, | |
358 | dd->buflen, DMA_TO_DEVICE); | |
359 | if (dma_mapping_error(dd->dev, dd->dma_addr_in)) { | |
360 | dev_err(dd->dev, "dma %d bytes error\n", dd->buflen); | |
361 | err = -EINVAL; | |
362 | goto err_map_in; | |
363 | } | |
364 | ||
365 | dd->dma_addr_out = dma_map_single(dd->dev, dd->buf_out, | |
366 | dd->buflen, DMA_FROM_DEVICE); | |
367 | if (dma_mapping_error(dd->dev, dd->dma_addr_out)) { | |
368 | dev_err(dd->dev, "dma %d bytes error\n", dd->buflen); | |
369 | err = -EINVAL; | |
370 | goto err_map_out; | |
371 | } | |
372 | ||
373 | return 0; | |
374 | ||
375 | err_map_out: | |
376 | dma_unmap_single(dd->dev, dd->dma_addr_in, dd->buflen, | |
377 | DMA_TO_DEVICE); | |
378 | err_map_in: | |
379 | free_page((unsigned long)dd->buf_out); | |
380 | free_page((unsigned long)dd->buf_in); | |
381 | err_alloc: | |
382 | if (err) | |
383 | pr_err("error: %d\n", err); | |
384 | return err; | |
385 | } | |
386 | ||
1f858040 | 387 | static void atmel_tdes_buff_cleanup(struct atmel_tdes_dev *dd) |
13802005 NR |
388 | { |
389 | dma_unmap_single(dd->dev, dd->dma_addr_out, dd->buflen, | |
390 | DMA_FROM_DEVICE); | |
391 | dma_unmap_single(dd->dev, dd->dma_addr_in, dd->buflen, | |
392 | DMA_TO_DEVICE); | |
393 | free_page((unsigned long)dd->buf_out); | |
394 | free_page((unsigned long)dd->buf_in); | |
395 | } | |
396 | ||
1f858040 | 397 | static int atmel_tdes_crypt_pdc(struct crypto_tfm *tfm, dma_addr_t dma_addr_in, |
13802005 NR |
398 | dma_addr_t dma_addr_out, int length) |
399 | { | |
400 | struct atmel_tdes_ctx *ctx = crypto_tfm_ctx(tfm); | |
401 | struct atmel_tdes_dev *dd = ctx->dd; | |
402 | int len32; | |
403 | ||
404 | dd->dma_size = length; | |
405 | ||
406 | if (!(dd->flags & TDES_FLAGS_FAST)) { | |
407 | dma_sync_single_for_device(dd->dev, dma_addr_in, length, | |
408 | DMA_TO_DEVICE); | |
409 | } | |
410 | ||
411 | if ((dd->flags & TDES_FLAGS_CFB) && (dd->flags & TDES_FLAGS_CFB8)) | |
412 | len32 = DIV_ROUND_UP(length, sizeof(u8)); | |
413 | else if ((dd->flags & TDES_FLAGS_CFB) && (dd->flags & TDES_FLAGS_CFB16)) | |
414 | len32 = DIV_ROUND_UP(length, sizeof(u16)); | |
415 | else | |
416 | len32 = DIV_ROUND_UP(length, sizeof(u32)); | |
417 | ||
418 | atmel_tdes_write(dd, TDES_PTCR, TDES_PTCR_TXTDIS|TDES_PTCR_RXTDIS); | |
419 | atmel_tdes_write(dd, TDES_TPR, dma_addr_in); | |
420 | atmel_tdes_write(dd, TDES_TCR, len32); | |
421 | atmel_tdes_write(dd, TDES_RPR, dma_addr_out); | |
422 | atmel_tdes_write(dd, TDES_RCR, len32); | |
423 | ||
424 | /* Enable Interrupt */ | |
425 | atmel_tdes_write(dd, TDES_IER, TDES_INT_ENDRX); | |
426 | ||
427 | /* Start DMA transfer */ | |
428 | atmel_tdes_write(dd, TDES_PTCR, TDES_PTCR_TXTEN | TDES_PTCR_RXTEN); | |
429 | ||
430 | return 0; | |
431 | } | |
432 | ||
1f858040 NR |
433 | static int atmel_tdes_crypt_dma(struct crypto_tfm *tfm, dma_addr_t dma_addr_in, |
434 | dma_addr_t dma_addr_out, int length) | |
435 | { | |
436 | struct atmel_tdes_ctx *ctx = crypto_tfm_ctx(tfm); | |
437 | struct atmel_tdes_dev *dd = ctx->dd; | |
438 | struct scatterlist sg[2]; | |
439 | struct dma_async_tx_descriptor *in_desc, *out_desc; | |
440 | ||
441 | dd->dma_size = length; | |
442 | ||
443 | if (!(dd->flags & TDES_FLAGS_FAST)) { | |
444 | dma_sync_single_for_device(dd->dev, dma_addr_in, length, | |
445 | DMA_TO_DEVICE); | |
446 | } | |
447 | ||
448 | if (dd->flags & TDES_FLAGS_CFB8) { | |
449 | dd->dma_lch_in.dma_conf.dst_addr_width = | |
450 | DMA_SLAVE_BUSWIDTH_1_BYTE; | |
451 | dd->dma_lch_out.dma_conf.src_addr_width = | |
452 | DMA_SLAVE_BUSWIDTH_1_BYTE; | |
453 | } else if (dd->flags & TDES_FLAGS_CFB16) { | |
454 | dd->dma_lch_in.dma_conf.dst_addr_width = | |
455 | DMA_SLAVE_BUSWIDTH_2_BYTES; | |
456 | dd->dma_lch_out.dma_conf.src_addr_width = | |
457 | DMA_SLAVE_BUSWIDTH_2_BYTES; | |
458 | } else { | |
459 | dd->dma_lch_in.dma_conf.dst_addr_width = | |
460 | DMA_SLAVE_BUSWIDTH_4_BYTES; | |
461 | dd->dma_lch_out.dma_conf.src_addr_width = | |
462 | DMA_SLAVE_BUSWIDTH_4_BYTES; | |
463 | } | |
464 | ||
465 | dmaengine_slave_config(dd->dma_lch_in.chan, &dd->dma_lch_in.dma_conf); | |
466 | dmaengine_slave_config(dd->dma_lch_out.chan, &dd->dma_lch_out.dma_conf); | |
467 | ||
468 | dd->flags |= TDES_FLAGS_DMA; | |
469 | ||
470 | sg_init_table(&sg[0], 1); | |
471 | sg_dma_address(&sg[0]) = dma_addr_in; | |
472 | sg_dma_len(&sg[0]) = length; | |
473 | ||
474 | sg_init_table(&sg[1], 1); | |
475 | sg_dma_address(&sg[1]) = dma_addr_out; | |
476 | sg_dma_len(&sg[1]) = length; | |
477 | ||
478 | in_desc = dmaengine_prep_slave_sg(dd->dma_lch_in.chan, &sg[0], | |
479 | 1, DMA_MEM_TO_DEV, | |
480 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); | |
481 | if (!in_desc) | |
482 | return -EINVAL; | |
483 | ||
484 | out_desc = dmaengine_prep_slave_sg(dd->dma_lch_out.chan, &sg[1], | |
485 | 1, DMA_DEV_TO_MEM, | |
486 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); | |
487 | if (!out_desc) | |
488 | return -EINVAL; | |
489 | ||
490 | out_desc->callback = atmel_tdes_dma_callback; | |
491 | out_desc->callback_param = dd; | |
492 | ||
493 | dmaengine_submit(out_desc); | |
494 | dma_async_issue_pending(dd->dma_lch_out.chan); | |
495 | ||
496 | dmaengine_submit(in_desc); | |
497 | dma_async_issue_pending(dd->dma_lch_in.chan); | |
498 | ||
499 | return 0; | |
500 | } | |
501 | ||
502 | static int atmel_tdes_crypt_start(struct atmel_tdes_dev *dd) | |
13802005 NR |
503 | { |
504 | struct crypto_tfm *tfm = crypto_ablkcipher_tfm( | |
505 | crypto_ablkcipher_reqtfm(dd->req)); | |
506 | int err, fast = 0, in, out; | |
507 | size_t count; | |
508 | dma_addr_t addr_in, addr_out; | |
509 | ||
1f858040 | 510 | if ((!dd->in_offset) && (!dd->out_offset)) { |
13802005 | 511 | /* check for alignment */ |
1f858040 NR |
512 | in = IS_ALIGNED((u32)dd->in_sg->offset, sizeof(u32)) && |
513 | IS_ALIGNED(dd->in_sg->length, dd->ctx->block_size); | |
514 | out = IS_ALIGNED((u32)dd->out_sg->offset, sizeof(u32)) && | |
515 | IS_ALIGNED(dd->out_sg->length, dd->ctx->block_size); | |
13802005 | 516 | fast = in && out; |
1f858040 NR |
517 | |
518 | if (sg_dma_len(dd->in_sg) != sg_dma_len(dd->out_sg)) | |
519 | fast = 0; | |
13802005 NR |
520 | } |
521 | ||
1f858040 | 522 | |
13802005 NR |
523 | if (fast) { |
524 | count = min(dd->total, sg_dma_len(dd->in_sg)); | |
525 | count = min(count, sg_dma_len(dd->out_sg)); | |
526 | ||
13802005 NR |
527 | err = dma_map_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE); |
528 | if (!err) { | |
529 | dev_err(dd->dev, "dma_map_sg() error\n"); | |
530 | return -EINVAL; | |
531 | } | |
532 | ||
533 | err = dma_map_sg(dd->dev, dd->out_sg, 1, | |
534 | DMA_FROM_DEVICE); | |
535 | if (!err) { | |
536 | dev_err(dd->dev, "dma_map_sg() error\n"); | |
537 | dma_unmap_sg(dd->dev, dd->in_sg, 1, | |
538 | DMA_TO_DEVICE); | |
539 | return -EINVAL; | |
540 | } | |
541 | ||
542 | addr_in = sg_dma_address(dd->in_sg); | |
543 | addr_out = sg_dma_address(dd->out_sg); | |
544 | ||
545 | dd->flags |= TDES_FLAGS_FAST; | |
546 | ||
547 | } else { | |
548 | /* use cache buffers */ | |
549 | count = atmel_tdes_sg_copy(&dd->in_sg, &dd->in_offset, | |
550 | dd->buf_in, dd->buflen, dd->total, 0); | |
551 | ||
552 | addr_in = dd->dma_addr_in; | |
553 | addr_out = dd->dma_addr_out; | |
554 | ||
555 | dd->flags &= ~TDES_FLAGS_FAST; | |
13802005 NR |
556 | } |
557 | ||
558 | dd->total -= count; | |
559 | ||
1f858040 NR |
560 | if (dd->caps.has_dma) |
561 | err = atmel_tdes_crypt_dma(tfm, addr_in, addr_out, count); | |
562 | else | |
563 | err = atmel_tdes_crypt_pdc(tfm, addr_in, addr_out, count); | |
564 | ||
565 | if (err && (dd->flags & TDES_FLAGS_FAST)) { | |
13802005 NR |
566 | dma_unmap_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE); |
567 | dma_unmap_sg(dd->dev, dd->out_sg, 1, DMA_TO_DEVICE); | |
568 | } | |
569 | ||
570 | return err; | |
571 | } | |
572 | ||
13802005 NR |
573 | static void atmel_tdes_finish_req(struct atmel_tdes_dev *dd, int err) |
574 | { | |
575 | struct ablkcipher_request *req = dd->req; | |
576 | ||
577 | clk_disable_unprepare(dd->iclk); | |
578 | ||
579 | dd->flags &= ~TDES_FLAGS_BUSY; | |
580 | ||
581 | req->base.complete(&req->base, err); | |
582 | } | |
583 | ||
584 | static int atmel_tdes_handle_queue(struct atmel_tdes_dev *dd, | |
585 | struct ablkcipher_request *req) | |
586 | { | |
587 | struct crypto_async_request *async_req, *backlog; | |
588 | struct atmel_tdes_ctx *ctx; | |
589 | struct atmel_tdes_reqctx *rctx; | |
590 | unsigned long flags; | |
591 | int err, ret = 0; | |
592 | ||
593 | spin_lock_irqsave(&dd->lock, flags); | |
594 | if (req) | |
595 | ret = ablkcipher_enqueue_request(&dd->queue, req); | |
596 | if (dd->flags & TDES_FLAGS_BUSY) { | |
597 | spin_unlock_irqrestore(&dd->lock, flags); | |
598 | return ret; | |
599 | } | |
600 | backlog = crypto_get_backlog(&dd->queue); | |
601 | async_req = crypto_dequeue_request(&dd->queue); | |
602 | if (async_req) | |
603 | dd->flags |= TDES_FLAGS_BUSY; | |
604 | spin_unlock_irqrestore(&dd->lock, flags); | |
605 | ||
606 | if (!async_req) | |
607 | return ret; | |
608 | ||
609 | if (backlog) | |
610 | backlog->complete(backlog, -EINPROGRESS); | |
611 | ||
612 | req = ablkcipher_request_cast(async_req); | |
613 | ||
614 | /* assign new request to device */ | |
615 | dd->req = req; | |
616 | dd->total = req->nbytes; | |
617 | dd->in_offset = 0; | |
618 | dd->in_sg = req->src; | |
619 | dd->out_offset = 0; | |
620 | dd->out_sg = req->dst; | |
621 | ||
622 | rctx = ablkcipher_request_ctx(req); | |
623 | ctx = crypto_ablkcipher_ctx(crypto_ablkcipher_reqtfm(req)); | |
624 | rctx->mode &= TDES_FLAGS_MODE_MASK; | |
625 | dd->flags = (dd->flags & ~TDES_FLAGS_MODE_MASK) | rctx->mode; | |
626 | dd->ctx = ctx; | |
627 | ctx->dd = dd; | |
628 | ||
629 | err = atmel_tdes_write_ctrl(dd); | |
630 | if (!err) | |
1f858040 | 631 | err = atmel_tdes_crypt_start(dd); |
13802005 NR |
632 | if (err) { |
633 | /* des_task will not finish it, so do it here */ | |
634 | atmel_tdes_finish_req(dd, err); | |
635 | tasklet_schedule(&dd->queue_task); | |
636 | } | |
637 | ||
638 | return ret; | |
639 | } | |
640 | ||
1f858040 NR |
641 | static int atmel_tdes_crypt_dma_stop(struct atmel_tdes_dev *dd) |
642 | { | |
643 | int err = -EINVAL; | |
644 | size_t count; | |
645 | ||
646 | if (dd->flags & TDES_FLAGS_DMA) { | |
647 | err = 0; | |
648 | if (dd->flags & TDES_FLAGS_FAST) { | |
649 | dma_unmap_sg(dd->dev, dd->out_sg, 1, DMA_FROM_DEVICE); | |
650 | dma_unmap_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE); | |
651 | } else { | |
652 | dma_sync_single_for_device(dd->dev, dd->dma_addr_out, | |
653 | dd->dma_size, DMA_FROM_DEVICE); | |
654 | ||
655 | /* copy data */ | |
656 | count = atmel_tdes_sg_copy(&dd->out_sg, &dd->out_offset, | |
657 | dd->buf_out, dd->buflen, dd->dma_size, 1); | |
658 | if (count != dd->dma_size) { | |
659 | err = -EINVAL; | |
660 | pr_err("not all data converted: %u\n", count); | |
661 | } | |
662 | } | |
663 | } | |
664 | return err; | |
665 | } | |
13802005 NR |
666 | |
667 | static int atmel_tdes_crypt(struct ablkcipher_request *req, unsigned long mode) | |
668 | { | |
669 | struct atmel_tdes_ctx *ctx = crypto_ablkcipher_ctx( | |
670 | crypto_ablkcipher_reqtfm(req)); | |
671 | struct atmel_tdes_reqctx *rctx = ablkcipher_request_ctx(req); | |
13802005 NR |
672 | |
673 | if (mode & TDES_FLAGS_CFB8) { | |
674 | if (!IS_ALIGNED(req->nbytes, CFB8_BLOCK_SIZE)) { | |
675 | pr_err("request size is not exact amount of CFB8 blocks\n"); | |
676 | return -EINVAL; | |
677 | } | |
1f858040 | 678 | ctx->block_size = CFB8_BLOCK_SIZE; |
13802005 NR |
679 | } else if (mode & TDES_FLAGS_CFB16) { |
680 | if (!IS_ALIGNED(req->nbytes, CFB16_BLOCK_SIZE)) { | |
681 | pr_err("request size is not exact amount of CFB16 blocks\n"); | |
682 | return -EINVAL; | |
683 | } | |
1f858040 | 684 | ctx->block_size = CFB16_BLOCK_SIZE; |
13802005 NR |
685 | } else if (mode & TDES_FLAGS_CFB32) { |
686 | if (!IS_ALIGNED(req->nbytes, CFB32_BLOCK_SIZE)) { | |
687 | pr_err("request size is not exact amount of CFB32 blocks\n"); | |
688 | return -EINVAL; | |
689 | } | |
1f858040 NR |
690 | ctx->block_size = CFB32_BLOCK_SIZE; |
691 | } else { | |
692 | if (!IS_ALIGNED(req->nbytes, DES_BLOCK_SIZE)) { | |
693 | pr_err("request size is not exact amount of DES blocks\n"); | |
694 | return -EINVAL; | |
695 | } | |
696 | ctx->block_size = DES_BLOCK_SIZE; | |
13802005 NR |
697 | } |
698 | ||
1f858040 NR |
699 | rctx->mode = mode; |
700 | ||
701 | return atmel_tdes_handle_queue(ctx->dd, req); | |
702 | } | |
703 | ||
704 | static bool atmel_tdes_filter(struct dma_chan *chan, void *slave) | |
705 | { | |
706 | struct at_dma_slave *sl = slave; | |
707 | ||
708 | if (sl && sl->dma_dev == chan->device->dev) { | |
709 | chan->private = sl; | |
710 | return true; | |
711 | } else { | |
712 | return false; | |
713 | } | |
714 | } | |
715 | ||
716 | static int atmel_tdes_dma_init(struct atmel_tdes_dev *dd, | |
717 | struct crypto_platform_data *pdata) | |
718 | { | |
719 | int err = -ENOMEM; | |
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"); |
1f858040 NR |
764 | return err; |
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 | { | |
776 | u32 tmp[DES_EXPKEY_WORDS]; | |
777 | int err; | |
778 | struct crypto_tfm *ctfm = crypto_ablkcipher_tfm(tfm); | |
779 | ||
780 | struct atmel_tdes_ctx *ctx = crypto_ablkcipher_ctx(tfm); | |
781 | ||
782 | if (keylen != DES_KEY_SIZE) { | |
783 | crypto_ablkcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN); | |
784 | return -EINVAL; | |
785 | } | |
786 | ||
787 | err = des_ekey(tmp, key); | |
788 | if (err == 0 && (ctfm->crt_flags & CRYPTO_TFM_REQ_WEAK_KEY)) { | |
789 | ctfm->crt_flags |= CRYPTO_TFM_RES_WEAK_KEY; | |
790 | return -EINVAL; | |
791 | } | |
792 | ||
793 | memcpy(ctx->key, key, keylen); | |
794 | ctx->keylen = keylen; | |
795 | ||
796 | return 0; | |
797 | } | |
798 | ||
799 | static int atmel_tdes_setkey(struct crypto_ablkcipher *tfm, const u8 *key, | |
800 | unsigned int keylen) | |
801 | { | |
802 | struct atmel_tdes_ctx *ctx = crypto_ablkcipher_ctx(tfm); | |
803 | const char *alg_name; | |
804 | ||
805 | alg_name = crypto_tfm_alg_name(crypto_ablkcipher_tfm(tfm)); | |
806 | ||
807 | /* | |
808 | * HW bug in cfb 3-keys mode. | |
809 | */ | |
1f858040 NR |
810 | if (!ctx->dd->caps.has_cfb_3keys && strstr(alg_name, "cfb") |
811 | && (keylen != 2*DES_KEY_SIZE)) { | |
13802005 NR |
812 | crypto_ablkcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN); |
813 | return -EINVAL; | |
814 | } else if ((keylen != 2*DES_KEY_SIZE) && (keylen != 3*DES_KEY_SIZE)) { | |
815 | crypto_ablkcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN); | |
816 | return -EINVAL; | |
817 | } | |
818 | ||
819 | memcpy(ctx->key, key, keylen); | |
820 | ctx->keylen = keylen; | |
821 | ||
822 | return 0; | |
823 | } | |
824 | ||
825 | static int atmel_tdes_ecb_encrypt(struct ablkcipher_request *req) | |
826 | { | |
827 | return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT); | |
828 | } | |
829 | ||
830 | static int atmel_tdes_ecb_decrypt(struct ablkcipher_request *req) | |
831 | { | |
832 | return atmel_tdes_crypt(req, 0); | |
833 | } | |
834 | ||
835 | static int atmel_tdes_cbc_encrypt(struct ablkcipher_request *req) | |
836 | { | |
837 | return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT | TDES_FLAGS_CBC); | |
838 | } | |
839 | ||
840 | static int atmel_tdes_cbc_decrypt(struct ablkcipher_request *req) | |
841 | { | |
842 | return atmel_tdes_crypt(req, TDES_FLAGS_CBC); | |
843 | } | |
844 | static int atmel_tdes_cfb_encrypt(struct ablkcipher_request *req) | |
845 | { | |
846 | return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT | TDES_FLAGS_CFB); | |
847 | } | |
848 | ||
849 | static int atmel_tdes_cfb_decrypt(struct ablkcipher_request *req) | |
850 | { | |
851 | return atmel_tdes_crypt(req, TDES_FLAGS_CFB); | |
852 | } | |
853 | ||
854 | static int atmel_tdes_cfb8_encrypt(struct ablkcipher_request *req) | |
855 | { | |
856 | return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT | TDES_FLAGS_CFB | | |
857 | TDES_FLAGS_CFB8); | |
858 | } | |
859 | ||
860 | static int atmel_tdes_cfb8_decrypt(struct ablkcipher_request *req) | |
861 | { | |
862 | return atmel_tdes_crypt(req, TDES_FLAGS_CFB | TDES_FLAGS_CFB8); | |
863 | } | |
864 | ||
865 | static int atmel_tdes_cfb16_encrypt(struct ablkcipher_request *req) | |
866 | { | |
867 | return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT | TDES_FLAGS_CFB | | |
868 | TDES_FLAGS_CFB16); | |
869 | } | |
870 | ||
871 | static int atmel_tdes_cfb16_decrypt(struct ablkcipher_request *req) | |
872 | { | |
873 | return atmel_tdes_crypt(req, TDES_FLAGS_CFB | TDES_FLAGS_CFB16); | |
874 | } | |
875 | ||
876 | static int atmel_tdes_cfb32_encrypt(struct ablkcipher_request *req) | |
877 | { | |
878 | return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT | TDES_FLAGS_CFB | | |
879 | TDES_FLAGS_CFB32); | |
880 | } | |
881 | ||
882 | static int atmel_tdes_cfb32_decrypt(struct ablkcipher_request *req) | |
883 | { | |
884 | return atmel_tdes_crypt(req, TDES_FLAGS_CFB | TDES_FLAGS_CFB32); | |
885 | } | |
886 | ||
887 | static int atmel_tdes_ofb_encrypt(struct ablkcipher_request *req) | |
888 | { | |
889 | return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT | TDES_FLAGS_OFB); | |
890 | } | |
891 | ||
892 | static int atmel_tdes_ofb_decrypt(struct ablkcipher_request *req) | |
893 | { | |
894 | return atmel_tdes_crypt(req, TDES_FLAGS_OFB); | |
895 | } | |
896 | ||
897 | static int atmel_tdes_cra_init(struct crypto_tfm *tfm) | |
898 | { | |
1f858040 NR |
899 | struct atmel_tdes_ctx *ctx = crypto_tfm_ctx(tfm); |
900 | struct atmel_tdes_dev *dd; | |
901 | ||
13802005 NR |
902 | tfm->crt_ablkcipher.reqsize = sizeof(struct atmel_tdes_reqctx); |
903 | ||
1f858040 NR |
904 | dd = atmel_tdes_find_dev(ctx); |
905 | if (!dd) | |
906 | return -ENODEV; | |
907 | ||
13802005 NR |
908 | return 0; |
909 | } | |
910 | ||
911 | static void atmel_tdes_cra_exit(struct crypto_tfm *tfm) | |
912 | { | |
913 | } | |
914 | ||
915 | static struct crypto_alg tdes_algs[] = { | |
916 | { | |
917 | .cra_name = "ecb(des)", | |
918 | .cra_driver_name = "atmel-ecb-des", | |
919 | .cra_priority = 100, | |
920 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
921 | .cra_blocksize = DES_BLOCK_SIZE, | |
922 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
1f858040 | 923 | .cra_alignmask = 0x7, |
13802005 NR |
924 | .cra_type = &crypto_ablkcipher_type, |
925 | .cra_module = THIS_MODULE, | |
926 | .cra_init = atmel_tdes_cra_init, | |
927 | .cra_exit = atmel_tdes_cra_exit, | |
928 | .cra_u.ablkcipher = { | |
929 | .min_keysize = DES_KEY_SIZE, | |
930 | .max_keysize = DES_KEY_SIZE, | |
931 | .setkey = atmel_des_setkey, | |
932 | .encrypt = atmel_tdes_ecb_encrypt, | |
933 | .decrypt = atmel_tdes_ecb_decrypt, | |
934 | } | |
935 | }, | |
936 | { | |
937 | .cra_name = "cbc(des)", | |
938 | .cra_driver_name = "atmel-cbc-des", | |
939 | .cra_priority = 100, | |
940 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
941 | .cra_blocksize = DES_BLOCK_SIZE, | |
942 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
1f858040 | 943 | .cra_alignmask = 0x7, |
13802005 NR |
944 | .cra_type = &crypto_ablkcipher_type, |
945 | .cra_module = THIS_MODULE, | |
946 | .cra_init = atmel_tdes_cra_init, | |
947 | .cra_exit = atmel_tdes_cra_exit, | |
948 | .cra_u.ablkcipher = { | |
949 | .min_keysize = DES_KEY_SIZE, | |
950 | .max_keysize = DES_KEY_SIZE, | |
951 | .ivsize = DES_BLOCK_SIZE, | |
952 | .setkey = atmel_des_setkey, | |
953 | .encrypt = atmel_tdes_cbc_encrypt, | |
954 | .decrypt = atmel_tdes_cbc_decrypt, | |
955 | } | |
956 | }, | |
957 | { | |
958 | .cra_name = "cfb(des)", | |
959 | .cra_driver_name = "atmel-cfb-des", | |
960 | .cra_priority = 100, | |
961 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
962 | .cra_blocksize = DES_BLOCK_SIZE, | |
963 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
1f858040 | 964 | .cra_alignmask = 0x7, |
13802005 NR |
965 | .cra_type = &crypto_ablkcipher_type, |
966 | .cra_module = THIS_MODULE, | |
967 | .cra_init = atmel_tdes_cra_init, | |
968 | .cra_exit = atmel_tdes_cra_exit, | |
969 | .cra_u.ablkcipher = { | |
970 | .min_keysize = DES_KEY_SIZE, | |
971 | .max_keysize = DES_KEY_SIZE, | |
972 | .ivsize = DES_BLOCK_SIZE, | |
973 | .setkey = atmel_des_setkey, | |
974 | .encrypt = atmel_tdes_cfb_encrypt, | |
975 | .decrypt = atmel_tdes_cfb_decrypt, | |
976 | } | |
977 | }, | |
978 | { | |
979 | .cra_name = "cfb8(des)", | |
980 | .cra_driver_name = "atmel-cfb8-des", | |
981 | .cra_priority = 100, | |
982 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
983 | .cra_blocksize = CFB8_BLOCK_SIZE, | |
984 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
985 | .cra_alignmask = 0, | |
986 | .cra_type = &crypto_ablkcipher_type, | |
987 | .cra_module = THIS_MODULE, | |
988 | .cra_init = atmel_tdes_cra_init, | |
989 | .cra_exit = atmel_tdes_cra_exit, | |
990 | .cra_u.ablkcipher = { | |
991 | .min_keysize = DES_KEY_SIZE, | |
992 | .max_keysize = DES_KEY_SIZE, | |
993 | .ivsize = DES_BLOCK_SIZE, | |
994 | .setkey = atmel_des_setkey, | |
995 | .encrypt = atmel_tdes_cfb8_encrypt, | |
996 | .decrypt = atmel_tdes_cfb8_decrypt, | |
997 | } | |
998 | }, | |
999 | { | |
1000 | .cra_name = "cfb16(des)", | |
1001 | .cra_driver_name = "atmel-cfb16-des", | |
1002 | .cra_priority = 100, | |
1003 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
1004 | .cra_blocksize = CFB16_BLOCK_SIZE, | |
1005 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
1f858040 | 1006 | .cra_alignmask = 0x1, |
13802005 NR |
1007 | .cra_type = &crypto_ablkcipher_type, |
1008 | .cra_module = THIS_MODULE, | |
1009 | .cra_init = atmel_tdes_cra_init, | |
1010 | .cra_exit = atmel_tdes_cra_exit, | |
1011 | .cra_u.ablkcipher = { | |
1012 | .min_keysize = DES_KEY_SIZE, | |
1013 | .max_keysize = DES_KEY_SIZE, | |
1014 | .ivsize = DES_BLOCK_SIZE, | |
1015 | .setkey = atmel_des_setkey, | |
1016 | .encrypt = atmel_tdes_cfb16_encrypt, | |
1017 | .decrypt = atmel_tdes_cfb16_decrypt, | |
1018 | } | |
1019 | }, | |
1020 | { | |
1021 | .cra_name = "cfb32(des)", | |
1022 | .cra_driver_name = "atmel-cfb32-des", | |
1023 | .cra_priority = 100, | |
1024 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
1025 | .cra_blocksize = CFB32_BLOCK_SIZE, | |
1026 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
1f858040 | 1027 | .cra_alignmask = 0x3, |
13802005 NR |
1028 | .cra_type = &crypto_ablkcipher_type, |
1029 | .cra_module = THIS_MODULE, | |
1030 | .cra_init = atmel_tdes_cra_init, | |
1031 | .cra_exit = atmel_tdes_cra_exit, | |
1032 | .cra_u.ablkcipher = { | |
1033 | .min_keysize = DES_KEY_SIZE, | |
1034 | .max_keysize = DES_KEY_SIZE, | |
1035 | .ivsize = DES_BLOCK_SIZE, | |
1036 | .setkey = atmel_des_setkey, | |
1037 | .encrypt = atmel_tdes_cfb32_encrypt, | |
1038 | .decrypt = atmel_tdes_cfb32_decrypt, | |
1039 | } | |
1040 | }, | |
1041 | { | |
1042 | .cra_name = "ofb(des)", | |
1043 | .cra_driver_name = "atmel-ofb-des", | |
1044 | .cra_priority = 100, | |
1045 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
1046 | .cra_blocksize = DES_BLOCK_SIZE, | |
1047 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
1f858040 | 1048 | .cra_alignmask = 0x7, |
13802005 NR |
1049 | .cra_type = &crypto_ablkcipher_type, |
1050 | .cra_module = THIS_MODULE, | |
1051 | .cra_init = atmel_tdes_cra_init, | |
1052 | .cra_exit = atmel_tdes_cra_exit, | |
1053 | .cra_u.ablkcipher = { | |
1054 | .min_keysize = DES_KEY_SIZE, | |
1055 | .max_keysize = DES_KEY_SIZE, | |
1056 | .ivsize = DES_BLOCK_SIZE, | |
1057 | .setkey = atmel_des_setkey, | |
1058 | .encrypt = atmel_tdes_ofb_encrypt, | |
1059 | .decrypt = atmel_tdes_ofb_decrypt, | |
1060 | } | |
1061 | }, | |
1062 | { | |
1063 | .cra_name = "ecb(des3_ede)", | |
1064 | .cra_driver_name = "atmel-ecb-tdes", | |
1065 | .cra_priority = 100, | |
1066 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
1067 | .cra_blocksize = DES_BLOCK_SIZE, | |
1068 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
1f858040 | 1069 | .cra_alignmask = 0x7, |
13802005 NR |
1070 | .cra_type = &crypto_ablkcipher_type, |
1071 | .cra_module = THIS_MODULE, | |
1072 | .cra_init = atmel_tdes_cra_init, | |
1073 | .cra_exit = atmel_tdes_cra_exit, | |
1074 | .cra_u.ablkcipher = { | |
1075 | .min_keysize = 2 * DES_KEY_SIZE, | |
1076 | .max_keysize = 3 * DES_KEY_SIZE, | |
1077 | .setkey = atmel_tdes_setkey, | |
1078 | .encrypt = atmel_tdes_ecb_encrypt, | |
1079 | .decrypt = atmel_tdes_ecb_decrypt, | |
1080 | } | |
1081 | }, | |
1082 | { | |
1083 | .cra_name = "cbc(des3_ede)", | |
1084 | .cra_driver_name = "atmel-cbc-tdes", | |
1085 | .cra_priority = 100, | |
1086 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
1087 | .cra_blocksize = DES_BLOCK_SIZE, | |
1088 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
1f858040 | 1089 | .cra_alignmask = 0x7, |
13802005 NR |
1090 | .cra_type = &crypto_ablkcipher_type, |
1091 | .cra_module = THIS_MODULE, | |
1092 | .cra_init = atmel_tdes_cra_init, | |
1093 | .cra_exit = atmel_tdes_cra_exit, | |
1094 | .cra_u.ablkcipher = { | |
1095 | .min_keysize = 2*DES_KEY_SIZE, | |
1096 | .max_keysize = 3*DES_KEY_SIZE, | |
1097 | .ivsize = DES_BLOCK_SIZE, | |
1098 | .setkey = atmel_tdes_setkey, | |
1099 | .encrypt = atmel_tdes_cbc_encrypt, | |
1100 | .decrypt = atmel_tdes_cbc_decrypt, | |
1101 | } | |
1102 | }, | |
1103 | { | |
1104 | .cra_name = "cfb(des3_ede)", | |
1105 | .cra_driver_name = "atmel-cfb-tdes", | |
1106 | .cra_priority = 100, | |
1107 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
1108 | .cra_blocksize = DES_BLOCK_SIZE, | |
1109 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
1f858040 | 1110 | .cra_alignmask = 0x7, |
13802005 NR |
1111 | .cra_type = &crypto_ablkcipher_type, |
1112 | .cra_module = THIS_MODULE, | |
1113 | .cra_init = atmel_tdes_cra_init, | |
1114 | .cra_exit = atmel_tdes_cra_exit, | |
1115 | .cra_u.ablkcipher = { | |
1116 | .min_keysize = 2*DES_KEY_SIZE, | |
1117 | .max_keysize = 2*DES_KEY_SIZE, | |
1118 | .ivsize = DES_BLOCK_SIZE, | |
1119 | .setkey = atmel_tdes_setkey, | |
1120 | .encrypt = atmel_tdes_cfb_encrypt, | |
1121 | .decrypt = atmel_tdes_cfb_decrypt, | |
1122 | } | |
1123 | }, | |
1124 | { | |
1125 | .cra_name = "cfb8(des3_ede)", | |
1126 | .cra_driver_name = "atmel-cfb8-tdes", | |
1127 | .cra_priority = 100, | |
1128 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
1129 | .cra_blocksize = CFB8_BLOCK_SIZE, | |
1130 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
1131 | .cra_alignmask = 0, | |
1132 | .cra_type = &crypto_ablkcipher_type, | |
1133 | .cra_module = THIS_MODULE, | |
1134 | .cra_init = atmel_tdes_cra_init, | |
1135 | .cra_exit = atmel_tdes_cra_exit, | |
1136 | .cra_u.ablkcipher = { | |
1137 | .min_keysize = 2*DES_KEY_SIZE, | |
1138 | .max_keysize = 2*DES_KEY_SIZE, | |
1139 | .ivsize = DES_BLOCK_SIZE, | |
1140 | .setkey = atmel_tdes_setkey, | |
1141 | .encrypt = atmel_tdes_cfb8_encrypt, | |
1142 | .decrypt = atmel_tdes_cfb8_decrypt, | |
1143 | } | |
1144 | }, | |
1145 | { | |
1146 | .cra_name = "cfb16(des3_ede)", | |
1147 | .cra_driver_name = "atmel-cfb16-tdes", | |
1148 | .cra_priority = 100, | |
1149 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
1150 | .cra_blocksize = CFB16_BLOCK_SIZE, | |
1151 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
1f858040 | 1152 | .cra_alignmask = 0x1, |
13802005 NR |
1153 | .cra_type = &crypto_ablkcipher_type, |
1154 | .cra_module = THIS_MODULE, | |
1155 | .cra_init = atmel_tdes_cra_init, | |
1156 | .cra_exit = atmel_tdes_cra_exit, | |
1157 | .cra_u.ablkcipher = { | |
1158 | .min_keysize = 2*DES_KEY_SIZE, | |
1159 | .max_keysize = 2*DES_KEY_SIZE, | |
1160 | .ivsize = DES_BLOCK_SIZE, | |
1161 | .setkey = atmel_tdes_setkey, | |
1162 | .encrypt = atmel_tdes_cfb16_encrypt, | |
1163 | .decrypt = atmel_tdes_cfb16_decrypt, | |
1164 | } | |
1165 | }, | |
1166 | { | |
1167 | .cra_name = "cfb32(des3_ede)", | |
1168 | .cra_driver_name = "atmel-cfb32-tdes", | |
1169 | .cra_priority = 100, | |
1170 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
1171 | .cra_blocksize = CFB32_BLOCK_SIZE, | |
1172 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
1f858040 | 1173 | .cra_alignmask = 0x3, |
13802005 NR |
1174 | .cra_type = &crypto_ablkcipher_type, |
1175 | .cra_module = THIS_MODULE, | |
1176 | .cra_init = atmel_tdes_cra_init, | |
1177 | .cra_exit = atmel_tdes_cra_exit, | |
1178 | .cra_u.ablkcipher = { | |
1179 | .min_keysize = 2*DES_KEY_SIZE, | |
1180 | .max_keysize = 2*DES_KEY_SIZE, | |
1181 | .ivsize = DES_BLOCK_SIZE, | |
1182 | .setkey = atmel_tdes_setkey, | |
1183 | .encrypt = atmel_tdes_cfb32_encrypt, | |
1184 | .decrypt = atmel_tdes_cfb32_decrypt, | |
1185 | } | |
1186 | }, | |
1187 | { | |
1188 | .cra_name = "ofb(des3_ede)", | |
1189 | .cra_driver_name = "atmel-ofb-tdes", | |
1190 | .cra_priority = 100, | |
1191 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
1192 | .cra_blocksize = DES_BLOCK_SIZE, | |
1193 | .cra_ctxsize = sizeof(struct atmel_tdes_ctx), | |
1f858040 | 1194 | .cra_alignmask = 0x7, |
13802005 NR |
1195 | .cra_type = &crypto_ablkcipher_type, |
1196 | .cra_module = THIS_MODULE, | |
1197 | .cra_init = atmel_tdes_cra_init, | |
1198 | .cra_exit = atmel_tdes_cra_exit, | |
1199 | .cra_u.ablkcipher = { | |
1200 | .min_keysize = 2*DES_KEY_SIZE, | |
1201 | .max_keysize = 3*DES_KEY_SIZE, | |
1202 | .ivsize = DES_BLOCK_SIZE, | |
1203 | .setkey = atmel_tdes_setkey, | |
1204 | .encrypt = atmel_tdes_ofb_encrypt, | |
1205 | .decrypt = atmel_tdes_ofb_decrypt, | |
1206 | } | |
1207 | }, | |
1208 | }; | |
1209 | ||
1210 | static void atmel_tdes_queue_task(unsigned long data) | |
1211 | { | |
1212 | struct atmel_tdes_dev *dd = (struct atmel_tdes_dev *)data; | |
1213 | ||
1214 | atmel_tdes_handle_queue(dd, NULL); | |
1215 | } | |
1216 | ||
1217 | static void atmel_tdes_done_task(unsigned long data) | |
1218 | { | |
1219 | struct atmel_tdes_dev *dd = (struct atmel_tdes_dev *) data; | |
1220 | int err; | |
1221 | ||
1f858040 NR |
1222 | if (!(dd->flags & TDES_FLAGS_DMA)) |
1223 | err = atmel_tdes_crypt_pdc_stop(dd); | |
1224 | else | |
1225 | err = atmel_tdes_crypt_dma_stop(dd); | |
13802005 NR |
1226 | |
1227 | err = dd->err ? : err; | |
1228 | ||
1229 | if (dd->total && !err) { | |
1f858040 NR |
1230 | if (dd->flags & TDES_FLAGS_FAST) { |
1231 | dd->in_sg = sg_next(dd->in_sg); | |
1232 | dd->out_sg = sg_next(dd->out_sg); | |
1233 | if (!dd->in_sg || !dd->out_sg) | |
1234 | err = -EINVAL; | |
1235 | } | |
13802005 | 1236 | if (!err) |
1f858040 NR |
1237 | err = atmel_tdes_crypt_start(dd); |
1238 | if (!err) | |
1239 | return; /* DMA started. Not fininishing. */ | |
13802005 NR |
1240 | } |
1241 | ||
1242 | atmel_tdes_finish_req(dd, err); | |
1243 | atmel_tdes_handle_queue(dd, NULL); | |
1244 | } | |
1245 | ||
1246 | static irqreturn_t atmel_tdes_irq(int irq, void *dev_id) | |
1247 | { | |
1248 | struct atmel_tdes_dev *tdes_dd = dev_id; | |
1249 | u32 reg; | |
1250 | ||
1251 | reg = atmel_tdes_read(tdes_dd, TDES_ISR); | |
1252 | if (reg & atmel_tdes_read(tdes_dd, TDES_IMR)) { | |
1253 | atmel_tdes_write(tdes_dd, TDES_IDR, reg); | |
1254 | if (TDES_FLAGS_BUSY & tdes_dd->flags) | |
1255 | tasklet_schedule(&tdes_dd->done_task); | |
1256 | else | |
1257 | dev_warn(tdes_dd->dev, "TDES interrupt when no active requests.\n"); | |
1258 | return IRQ_HANDLED; | |
1259 | } | |
1260 | ||
1261 | return IRQ_NONE; | |
1262 | } | |
1263 | ||
1264 | static void atmel_tdes_unregister_algs(struct atmel_tdes_dev *dd) | |
1265 | { | |
1266 | int i; | |
1267 | ||
1268 | for (i = 0; i < ARRAY_SIZE(tdes_algs); i++) | |
1269 | crypto_unregister_alg(&tdes_algs[i]); | |
1270 | } | |
1271 | ||
1272 | static int atmel_tdes_register_algs(struct atmel_tdes_dev *dd) | |
1273 | { | |
1274 | int err, i, j; | |
1275 | ||
1276 | for (i = 0; i < ARRAY_SIZE(tdes_algs); i++) { | |
13802005 NR |
1277 | err = crypto_register_alg(&tdes_algs[i]); |
1278 | if (err) | |
1279 | goto err_tdes_algs; | |
1280 | } | |
1281 | ||
1282 | return 0; | |
1283 | ||
1284 | err_tdes_algs: | |
1285 | for (j = 0; j < i; j++) | |
1286 | crypto_unregister_alg(&tdes_algs[j]); | |
1287 | ||
1288 | return err; | |
1289 | } | |
1290 | ||
1f858040 NR |
1291 | static void atmel_tdes_get_cap(struct atmel_tdes_dev *dd) |
1292 | { | |
1293 | ||
1294 | dd->caps.has_dma = 0; | |
1295 | dd->caps.has_cfb_3keys = 0; | |
1296 | ||
1297 | /* keep only major version number */ | |
1298 | switch (dd->hw_version & 0xf00) { | |
1299 | case 0x700: | |
1300 | dd->caps.has_dma = 1; | |
1301 | dd->caps.has_cfb_3keys = 1; | |
1302 | break; | |
1303 | case 0x600: | |
1304 | break; | |
1305 | default: | |
1306 | dev_warn(dd->dev, | |
1307 | "Unmanaged tdes version, set minimum capabilities\n"); | |
1308 | break; | |
1309 | } | |
1310 | } | |
1311 | ||
84c8976b NF |
1312 | #if defined(CONFIG_OF) |
1313 | static const struct of_device_id atmel_tdes_dt_ids[] = { | |
1314 | { .compatible = "atmel,at91sam9g46-tdes" }, | |
1315 | { /* sentinel */ } | |
1316 | }; | |
1317 | MODULE_DEVICE_TABLE(of, atmel_tdes_dt_ids); | |
1318 | ||
1319 | static struct crypto_platform_data *atmel_tdes_of_init(struct platform_device *pdev) | |
1320 | { | |
1321 | struct device_node *np = pdev->dev.of_node; | |
1322 | struct crypto_platform_data *pdata; | |
1323 | ||
1324 | if (!np) { | |
1325 | dev_err(&pdev->dev, "device node not found\n"); | |
1326 | return ERR_PTR(-EINVAL); | |
1327 | } | |
1328 | ||
1329 | pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); | |
1330 | if (!pdata) { | |
1331 | dev_err(&pdev->dev, "could not allocate memory for pdata\n"); | |
1332 | return ERR_PTR(-ENOMEM); | |
1333 | } | |
1334 | ||
1335 | pdata->dma_slave = devm_kzalloc(&pdev->dev, | |
1336 | sizeof(*(pdata->dma_slave)), | |
1337 | GFP_KERNEL); | |
1338 | if (!pdata->dma_slave) { | |
1339 | dev_err(&pdev->dev, "could not allocate memory for dma_slave\n"); | |
1340 | devm_kfree(&pdev->dev, pdata); | |
1341 | return ERR_PTR(-ENOMEM); | |
1342 | } | |
1343 | ||
1344 | return pdata; | |
1345 | } | |
1346 | #else /* CONFIG_OF */ | |
1347 | static inline struct crypto_platform_data *atmel_tdes_of_init(struct platform_device *pdev) | |
1348 | { | |
1349 | return ERR_PTR(-EINVAL); | |
1350 | } | |
1351 | #endif | |
1352 | ||
49cfe4db | 1353 | static int atmel_tdes_probe(struct platform_device *pdev) |
13802005 NR |
1354 | { |
1355 | struct atmel_tdes_dev *tdes_dd; | |
1f858040 | 1356 | struct crypto_platform_data *pdata; |
13802005 NR |
1357 | struct device *dev = &pdev->dev; |
1358 | struct resource *tdes_res; | |
1359 | unsigned long tdes_phys_size; | |
1360 | int err; | |
1361 | ||
1362 | tdes_dd = kzalloc(sizeof(struct atmel_tdes_dev), GFP_KERNEL); | |
1363 | if (tdes_dd == NULL) { | |
1364 | dev_err(dev, "unable to alloc data struct.\n"); | |
1365 | err = -ENOMEM; | |
1366 | goto tdes_dd_err; | |
1367 | } | |
1368 | ||
1369 | tdes_dd->dev = dev; | |
1370 | ||
1371 | platform_set_drvdata(pdev, tdes_dd); | |
1372 | ||
1373 | INIT_LIST_HEAD(&tdes_dd->list); | |
1374 | ||
1375 | tasklet_init(&tdes_dd->done_task, atmel_tdes_done_task, | |
1376 | (unsigned long)tdes_dd); | |
1377 | tasklet_init(&tdes_dd->queue_task, atmel_tdes_queue_task, | |
1378 | (unsigned long)tdes_dd); | |
1379 | ||
1380 | crypto_init_queue(&tdes_dd->queue, ATMEL_TDES_QUEUE_LENGTH); | |
1381 | ||
1382 | tdes_dd->irq = -1; | |
1383 | ||
1384 | /* Get the base address */ | |
1385 | tdes_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1386 | if (!tdes_res) { | |
1387 | dev_err(dev, "no MEM resource info\n"); | |
1388 | err = -ENODEV; | |
1389 | goto res_err; | |
1390 | } | |
1391 | tdes_dd->phys_base = tdes_res->start; | |
1392 | tdes_phys_size = resource_size(tdes_res); | |
1393 | ||
1394 | /* Get the IRQ */ | |
1395 | tdes_dd->irq = platform_get_irq(pdev, 0); | |
1396 | if (tdes_dd->irq < 0) { | |
1397 | dev_err(dev, "no IRQ resource info\n"); | |
1398 | err = tdes_dd->irq; | |
1399 | goto res_err; | |
1400 | } | |
1401 | ||
1402 | err = request_irq(tdes_dd->irq, atmel_tdes_irq, IRQF_SHARED, | |
1403 | "atmel-tdes", tdes_dd); | |
1404 | if (err) { | |
1405 | dev_err(dev, "unable to request tdes irq.\n"); | |
1406 | goto tdes_irq_err; | |
1407 | } | |
1408 | ||
1409 | /* Initializing the clock */ | |
1f858040 | 1410 | tdes_dd->iclk = clk_get(&pdev->dev, "tdes_clk"); |
13802005 NR |
1411 | if (IS_ERR(tdes_dd->iclk)) { |
1412 | dev_err(dev, "clock intialization failed.\n"); | |
1413 | err = PTR_ERR(tdes_dd->iclk); | |
1414 | goto clk_err; | |
1415 | } | |
1416 | ||
1417 | tdes_dd->io_base = ioremap(tdes_dd->phys_base, tdes_phys_size); | |
1418 | if (!tdes_dd->io_base) { | |
1419 | dev_err(dev, "can't ioremap\n"); | |
1420 | err = -ENOMEM; | |
1421 | goto tdes_io_err; | |
1422 | } | |
1423 | ||
1f858040 NR |
1424 | atmel_tdes_hw_version_init(tdes_dd); |
1425 | ||
1426 | atmel_tdes_get_cap(tdes_dd); | |
1427 | ||
1428 | err = atmel_tdes_buff_init(tdes_dd); | |
13802005 | 1429 | if (err) |
1f858040 NR |
1430 | goto err_tdes_buff; |
1431 | ||
1432 | if (tdes_dd->caps.has_dma) { | |
1433 | pdata = pdev->dev.platform_data; | |
1434 | if (!pdata) { | |
84c8976b NF |
1435 | pdata = atmel_tdes_of_init(pdev); |
1436 | if (IS_ERR(pdata)) { | |
1437 | dev_err(&pdev->dev, "platform data not available\n"); | |
1438 | err = PTR_ERR(pdata); | |
1439 | goto err_pdata; | |
1440 | } | |
1441 | } | |
1442 | if (!pdata->dma_slave) { | |
1f858040 NR |
1443 | err = -ENXIO; |
1444 | goto err_pdata; | |
1445 | } | |
1446 | err = atmel_tdes_dma_init(tdes_dd, pdata); | |
1447 | if (err) | |
1448 | goto err_tdes_dma; | |
84c8976b NF |
1449 | |
1450 | dev_info(dev, "using %s, %s for DMA transfers\n", | |
1451 | dma_chan_name(tdes_dd->dma_lch_in.chan), | |
1452 | dma_chan_name(tdes_dd->dma_lch_out.chan)); | |
1f858040 | 1453 | } |
13802005 NR |
1454 | |
1455 | spin_lock(&atmel_tdes.lock); | |
1456 | list_add_tail(&tdes_dd->list, &atmel_tdes.dev_list); | |
1457 | spin_unlock(&atmel_tdes.lock); | |
1458 | ||
1459 | err = atmel_tdes_register_algs(tdes_dd); | |
1460 | if (err) | |
1461 | goto err_algs; | |
1462 | ||
1463 | dev_info(dev, "Atmel DES/TDES\n"); | |
1464 | ||
1465 | return 0; | |
1466 | ||
1467 | err_algs: | |
1468 | spin_lock(&atmel_tdes.lock); | |
1469 | list_del(&tdes_dd->list); | |
1470 | spin_unlock(&atmel_tdes.lock); | |
1f858040 NR |
1471 | if (tdes_dd->caps.has_dma) |
1472 | atmel_tdes_dma_cleanup(tdes_dd); | |
13802005 | 1473 | err_tdes_dma: |
1f858040 NR |
1474 | err_pdata: |
1475 | atmel_tdes_buff_cleanup(tdes_dd); | |
1476 | err_tdes_buff: | |
13802005 NR |
1477 | iounmap(tdes_dd->io_base); |
1478 | tdes_io_err: | |
1479 | clk_put(tdes_dd->iclk); | |
1480 | clk_err: | |
1481 | free_irq(tdes_dd->irq, tdes_dd); | |
1482 | tdes_irq_err: | |
1483 | res_err: | |
1484 | tasklet_kill(&tdes_dd->done_task); | |
1485 | tasklet_kill(&tdes_dd->queue_task); | |
1486 | kfree(tdes_dd); | |
1487 | tdes_dd = NULL; | |
1488 | tdes_dd_err: | |
1489 | dev_err(dev, "initialization failed.\n"); | |
1490 | ||
1491 | return err; | |
1492 | } | |
1493 | ||
49cfe4db | 1494 | static int atmel_tdes_remove(struct platform_device *pdev) |
13802005 NR |
1495 | { |
1496 | static struct atmel_tdes_dev *tdes_dd; | |
1497 | ||
1498 | tdes_dd = platform_get_drvdata(pdev); | |
1499 | if (!tdes_dd) | |
1500 | return -ENODEV; | |
1501 | spin_lock(&atmel_tdes.lock); | |
1502 | list_del(&tdes_dd->list); | |
1503 | spin_unlock(&atmel_tdes.lock); | |
1504 | ||
1505 | atmel_tdes_unregister_algs(tdes_dd); | |
1506 | ||
1507 | tasklet_kill(&tdes_dd->done_task); | |
1508 | tasklet_kill(&tdes_dd->queue_task); | |
1509 | ||
1f858040 NR |
1510 | if (tdes_dd->caps.has_dma) |
1511 | atmel_tdes_dma_cleanup(tdes_dd); | |
1512 | ||
1513 | atmel_tdes_buff_cleanup(tdes_dd); | |
13802005 NR |
1514 | |
1515 | iounmap(tdes_dd->io_base); | |
1516 | ||
1517 | clk_put(tdes_dd->iclk); | |
1518 | ||
1519 | if (tdes_dd->irq >= 0) | |
1520 | free_irq(tdes_dd->irq, tdes_dd); | |
1521 | ||
1522 | kfree(tdes_dd); | |
1523 | tdes_dd = NULL; | |
1524 | ||
1525 | return 0; | |
1526 | } | |
1527 | ||
1528 | static struct platform_driver atmel_tdes_driver = { | |
1529 | .probe = atmel_tdes_probe, | |
49cfe4db | 1530 | .remove = atmel_tdes_remove, |
13802005 NR |
1531 | .driver = { |
1532 | .name = "atmel_tdes", | |
1533 | .owner = THIS_MODULE, | |
84c8976b | 1534 | .of_match_table = of_match_ptr(atmel_tdes_dt_ids), |
13802005 NR |
1535 | }, |
1536 | }; | |
1537 | ||
1538 | module_platform_driver(atmel_tdes_driver); | |
1539 | ||
1540 | MODULE_DESCRIPTION("Atmel DES/TDES hw acceleration support."); | |
1541 | MODULE_LICENSE("GPL v2"); | |
1542 | MODULE_AUTHOR("Nicolas Royer - Eukréa Electromatique"); |