Commit | Line | Data |
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537559a5 DK |
1 | /* |
2 | * Cryptographic API. | |
3 | * | |
4 | * Support for OMAP AES HW acceleration. | |
5 | * | |
6 | * Copyright (c) 2010 Nokia Corporation | |
7 | * Author: Dmitry Kasatkin <dmitry.kasatkin@nokia.com> | |
0d35583a | 8 | * Copyright (c) 2011 Texas Instruments Incorporated |
537559a5 DK |
9 | * |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License version 2 as published | |
12 | * by the Free Software Foundation. | |
13 | * | |
14 | */ | |
15 | ||
016af9b5 JF |
16 | #define pr_fmt(fmt) "%20s: " fmt, __func__ |
17 | #define prn(num) pr_debug(#num "=%d\n", num) | |
18 | #define prx(num) pr_debug(#num "=%x\n", num) | |
537559a5 DK |
19 | |
20 | #include <linux/err.h> | |
21 | #include <linux/module.h> | |
22 | #include <linux/init.h> | |
23 | #include <linux/errno.h> | |
24 | #include <linux/kernel.h> | |
537559a5 DK |
25 | #include <linux/platform_device.h> |
26 | #include <linux/scatterlist.h> | |
27 | #include <linux/dma-mapping.h> | |
ebedbf79 MG |
28 | #include <linux/dmaengine.h> |
29 | #include <linux/omap-dma.h> | |
5946c4a5 | 30 | #include <linux/pm_runtime.h> |
bc69d124 MG |
31 | #include <linux/of.h> |
32 | #include <linux/of_device.h> | |
33 | #include <linux/of_address.h> | |
537559a5 DK |
34 | #include <linux/io.h> |
35 | #include <linux/crypto.h> | |
36 | #include <linux/interrupt.h> | |
37 | #include <crypto/scatterwalk.h> | |
38 | #include <crypto/aes.h> | |
39 | ||
ebedbf79 MG |
40 | #define DST_MAXBURST 4 |
41 | #define DMA_MIN (DST_MAXBURST * sizeof(u32)) | |
537559a5 DK |
42 | |
43 | /* OMAP TRM gives bitfields as start:end, where start is the higher bit | |
44 | number. For example 7:0 */ | |
45 | #define FLD_MASK(start, end) (((1 << ((start) - (end) + 1)) - 1) << (end)) | |
46 | #define FLD_VAL(val, start, end) (((val) << (end)) & FLD_MASK(start, end)) | |
47 | ||
0d35583a MG |
48 | #define AES_REG_KEY(dd, x) ((dd)->pdata->key_ofs - \ |
49 | ((x ^ 0x01) * 0x04)) | |
50 | #define AES_REG_IV(dd, x) ((dd)->pdata->iv_ofs + ((x) * 0x04)) | |
537559a5 | 51 | |
0d35583a | 52 | #define AES_REG_CTRL(dd) ((dd)->pdata->ctrl_ofs) |
f9fb69e7 MG |
53 | #define AES_REG_CTRL_CTR_WIDTH_MASK (3 << 7) |
54 | #define AES_REG_CTRL_CTR_WIDTH_32 (0 << 7) | |
55 | #define AES_REG_CTRL_CTR_WIDTH_64 (1 << 7) | |
56 | #define AES_REG_CTRL_CTR_WIDTH_96 (2 << 7) | |
57 | #define AES_REG_CTRL_CTR_WIDTH_128 (3 << 7) | |
537559a5 DK |
58 | #define AES_REG_CTRL_CTR (1 << 6) |
59 | #define AES_REG_CTRL_CBC (1 << 5) | |
60 | #define AES_REG_CTRL_KEY_SIZE (3 << 3) | |
61 | #define AES_REG_CTRL_DIRECTION (1 << 2) | |
62 | #define AES_REG_CTRL_INPUT_READY (1 << 1) | |
63 | #define AES_REG_CTRL_OUTPUT_READY (1 << 0) | |
64 | ||
0d35583a | 65 | #define AES_REG_DATA_N(dd, x) ((dd)->pdata->data_ofs + ((x) * 0x04)) |
537559a5 | 66 | |
0d35583a | 67 | #define AES_REG_REV(dd) ((dd)->pdata->rev_ofs) |
537559a5 | 68 | |
0d35583a | 69 | #define AES_REG_MASK(dd) ((dd)->pdata->mask_ofs) |
537559a5 DK |
70 | #define AES_REG_MASK_SIDLE (1 << 6) |
71 | #define AES_REG_MASK_START (1 << 5) | |
72 | #define AES_REG_MASK_DMA_OUT_EN (1 << 3) | |
73 | #define AES_REG_MASK_DMA_IN_EN (1 << 2) | |
74 | #define AES_REG_MASK_SOFTRESET (1 << 1) | |
75 | #define AES_REG_AUTOIDLE (1 << 0) | |
76 | ||
0d35583a | 77 | #define AES_REG_LENGTH_N(x) (0x54 + ((x) * 0x04)) |
537559a5 DK |
78 | |
79 | #define DEFAULT_TIMEOUT (5*HZ) | |
80 | ||
81 | #define FLAGS_MODE_MASK 0x000f | |
82 | #define FLAGS_ENCRYPT BIT(0) | |
83 | #define FLAGS_CBC BIT(1) | |
84 | #define FLAGS_GIV BIT(2) | |
f9fb69e7 | 85 | #define FLAGS_CTR BIT(3) |
537559a5 | 86 | |
67a730ce DK |
87 | #define FLAGS_INIT BIT(4) |
88 | #define FLAGS_FAST BIT(5) | |
89 | #define FLAGS_BUSY BIT(6) | |
537559a5 DK |
90 | |
91 | struct omap_aes_ctx { | |
92 | struct omap_aes_dev *dd; | |
93 | ||
94 | int keylen; | |
95 | u32 key[AES_KEYSIZE_256 / sizeof(u32)]; | |
96 | unsigned long flags; | |
97 | }; | |
98 | ||
99 | struct omap_aes_reqctx { | |
100 | unsigned long mode; | |
101 | }; | |
102 | ||
103 | #define OMAP_AES_QUEUE_LENGTH 1 | |
104 | #define OMAP_AES_CACHE_SIZE 0 | |
105 | ||
f9fb69e7 MG |
106 | struct omap_aes_algs_info { |
107 | struct crypto_alg *algs_list; | |
108 | unsigned int size; | |
109 | unsigned int registered; | |
110 | }; | |
111 | ||
0d35583a | 112 | struct omap_aes_pdata { |
f9fb69e7 MG |
113 | struct omap_aes_algs_info *algs_info; |
114 | unsigned int algs_info_size; | |
115 | ||
0d35583a MG |
116 | void (*trigger)(struct omap_aes_dev *dd, int length); |
117 | ||
118 | u32 key_ofs; | |
119 | u32 iv_ofs; | |
120 | u32 ctrl_ofs; | |
121 | u32 data_ofs; | |
122 | u32 rev_ofs; | |
123 | u32 mask_ofs; | |
124 | ||
125 | u32 dma_enable_in; | |
126 | u32 dma_enable_out; | |
127 | u32 dma_start; | |
128 | ||
129 | u32 major_mask; | |
130 | u32 major_shift; | |
131 | u32 minor_mask; | |
132 | u32 minor_shift; | |
133 | }; | |
134 | ||
537559a5 DK |
135 | struct omap_aes_dev { |
136 | struct list_head list; | |
137 | unsigned long phys_base; | |
efce41b6 | 138 | void __iomem *io_base; |
537559a5 DK |
139 | struct omap_aes_ctx *ctx; |
140 | struct device *dev; | |
141 | unsigned long flags; | |
21fe9767 | 142 | int err; |
537559a5 | 143 | |
21fe9767 DK |
144 | spinlock_t lock; |
145 | struct crypto_queue queue; | |
537559a5 | 146 | |
21fe9767 DK |
147 | struct tasklet_struct done_task; |
148 | struct tasklet_struct queue_task; | |
537559a5 DK |
149 | |
150 | struct ablkcipher_request *req; | |
151 | size_t total; | |
152 | struct scatterlist *in_sg; | |
ebedbf79 | 153 | struct scatterlist in_sgl; |
537559a5 DK |
154 | size_t in_offset; |
155 | struct scatterlist *out_sg; | |
ebedbf79 | 156 | struct scatterlist out_sgl; |
537559a5 DK |
157 | size_t out_offset; |
158 | ||
159 | size_t buflen; | |
160 | void *buf_in; | |
161 | size_t dma_size; | |
162 | int dma_in; | |
ebedbf79 | 163 | struct dma_chan *dma_lch_in; |
537559a5 DK |
164 | dma_addr_t dma_addr_in; |
165 | void *buf_out; | |
166 | int dma_out; | |
ebedbf79 | 167 | struct dma_chan *dma_lch_out; |
e77c756e JF |
168 | int in_sg_len; |
169 | int out_sg_len; | |
537559a5 | 170 | dma_addr_t dma_addr_out; |
0d35583a MG |
171 | |
172 | const struct omap_aes_pdata *pdata; | |
537559a5 DK |
173 | }; |
174 | ||
175 | /* keep registered devices data here */ | |
176 | static LIST_HEAD(dev_list); | |
177 | static DEFINE_SPINLOCK(list_lock); | |
178 | ||
016af9b5 JF |
179 | #ifdef DEBUG |
180 | #define omap_aes_read(dd, offset) \ | |
181 | ({ \ | |
182 | int _read_ret; \ | |
183 | _read_ret = __raw_readl(dd->io_base + offset); \ | |
184 | pr_debug("omap_aes_read(" #offset "=%#x)= %#x\n", \ | |
185 | offset, _read_ret); \ | |
186 | _read_ret; \ | |
187 | }) | |
188 | #else | |
537559a5 DK |
189 | static inline u32 omap_aes_read(struct omap_aes_dev *dd, u32 offset) |
190 | { | |
191 | return __raw_readl(dd->io_base + offset); | |
192 | } | |
016af9b5 JF |
193 | #endif |
194 | ||
195 | #ifdef DEBUG | |
196 | #define omap_aes_write(dd, offset, value) \ | |
197 | do { \ | |
198 | pr_debug("omap_aes_write(" #offset "=%#x) value=%#x\n", \ | |
199 | offset, value); \ | |
200 | __raw_writel(value, dd->io_base + offset); \ | |
201 | } while (0) | |
202 | #else | |
537559a5 DK |
203 | static inline void omap_aes_write(struct omap_aes_dev *dd, u32 offset, |
204 | u32 value) | |
205 | { | |
206 | __raw_writel(value, dd->io_base + offset); | |
207 | } | |
016af9b5 | 208 | #endif |
537559a5 DK |
209 | |
210 | static inline void omap_aes_write_mask(struct omap_aes_dev *dd, u32 offset, | |
211 | u32 value, u32 mask) | |
212 | { | |
213 | u32 val; | |
214 | ||
215 | val = omap_aes_read(dd, offset); | |
216 | val &= ~mask; | |
217 | val |= value; | |
218 | omap_aes_write(dd, offset, val); | |
219 | } | |
220 | ||
221 | static void omap_aes_write_n(struct omap_aes_dev *dd, u32 offset, | |
222 | u32 *value, int count) | |
223 | { | |
224 | for (; count--; value++, offset += 4) | |
225 | omap_aes_write(dd, offset, *value); | |
226 | } | |
227 | ||
537559a5 DK |
228 | static int omap_aes_hw_init(struct omap_aes_dev *dd) |
229 | { | |
537559a5 | 230 | if (!(dd->flags & FLAGS_INIT)) { |
eeb2b202 | 231 | dd->flags |= FLAGS_INIT; |
21fe9767 | 232 | dd->err = 0; |
537559a5 DK |
233 | } |
234 | ||
eeb2b202 | 235 | return 0; |
537559a5 DK |
236 | } |
237 | ||
21fe9767 | 238 | static int omap_aes_write_ctrl(struct omap_aes_dev *dd) |
537559a5 DK |
239 | { |
240 | unsigned int key32; | |
67a730ce | 241 | int i, err; |
f9fb69e7 | 242 | u32 val, mask = 0; |
537559a5 | 243 | |
21fe9767 DK |
244 | err = omap_aes_hw_init(dd); |
245 | if (err) | |
246 | return err; | |
247 | ||
537559a5 | 248 | key32 = dd->ctx->keylen / sizeof(u32); |
67a730ce DK |
249 | |
250 | /* it seems a key should always be set even if it has not changed */ | |
537559a5 | 251 | for (i = 0; i < key32; i++) { |
0d35583a | 252 | omap_aes_write(dd, AES_REG_KEY(dd, i), |
537559a5 DK |
253 | __le32_to_cpu(dd->ctx->key[i])); |
254 | } | |
537559a5 | 255 | |
f9fb69e7 | 256 | if ((dd->flags & (FLAGS_CBC | FLAGS_CTR)) && dd->req->info) |
0d35583a | 257 | omap_aes_write_n(dd, AES_REG_IV(dd, 0), dd->req->info, 4); |
67a730ce DK |
258 | |
259 | val = FLD_VAL(((dd->ctx->keylen >> 3) - 1), 4, 3); | |
260 | if (dd->flags & FLAGS_CBC) | |
261 | val |= AES_REG_CTRL_CBC; | |
f9fb69e7 MG |
262 | if (dd->flags & FLAGS_CTR) { |
263 | val |= AES_REG_CTRL_CTR | AES_REG_CTRL_CTR_WIDTH_32; | |
264 | mask = AES_REG_CTRL_CTR | AES_REG_CTRL_CTR_WIDTH_MASK; | |
265 | } | |
67a730ce DK |
266 | if (dd->flags & FLAGS_ENCRYPT) |
267 | val |= AES_REG_CTRL_DIRECTION; | |
537559a5 | 268 | |
f9fb69e7 | 269 | mask |= AES_REG_CTRL_CBC | AES_REG_CTRL_DIRECTION | |
537559a5 DK |
270 | AES_REG_CTRL_KEY_SIZE; |
271 | ||
0d35583a | 272 | omap_aes_write_mask(dd, AES_REG_CTRL(dd), val, mask); |
537559a5 | 273 | |
21fe9767 | 274 | return 0; |
537559a5 DK |
275 | } |
276 | ||
0d35583a MG |
277 | static void omap_aes_dma_trigger_omap2(struct omap_aes_dev *dd, int length) |
278 | { | |
279 | u32 mask, val; | |
280 | ||
281 | val = dd->pdata->dma_start; | |
282 | ||
283 | if (dd->dma_lch_out != NULL) | |
284 | val |= dd->pdata->dma_enable_out; | |
285 | if (dd->dma_lch_in != NULL) | |
286 | val |= dd->pdata->dma_enable_in; | |
287 | ||
288 | mask = dd->pdata->dma_enable_out | dd->pdata->dma_enable_in | | |
289 | dd->pdata->dma_start; | |
290 | ||
291 | omap_aes_write_mask(dd, AES_REG_MASK(dd), val, mask); | |
292 | ||
293 | } | |
294 | ||
295 | static void omap_aes_dma_trigger_omap4(struct omap_aes_dev *dd, int length) | |
296 | { | |
297 | omap_aes_write(dd, AES_REG_LENGTH_N(0), length); | |
298 | omap_aes_write(dd, AES_REG_LENGTH_N(1), 0); | |
299 | ||
300 | omap_aes_dma_trigger_omap2(dd, length); | |
301 | } | |
302 | ||
303 | static void omap_aes_dma_stop(struct omap_aes_dev *dd) | |
304 | { | |
305 | u32 mask; | |
306 | ||
307 | mask = dd->pdata->dma_enable_out | dd->pdata->dma_enable_in | | |
308 | dd->pdata->dma_start; | |
309 | ||
310 | omap_aes_write_mask(dd, AES_REG_MASK(dd), 0, mask); | |
311 | } | |
312 | ||
537559a5 DK |
313 | static struct omap_aes_dev *omap_aes_find_dev(struct omap_aes_ctx *ctx) |
314 | { | |
315 | struct omap_aes_dev *dd = NULL, *tmp; | |
316 | ||
317 | spin_lock_bh(&list_lock); | |
318 | if (!ctx->dd) { | |
319 | list_for_each_entry(tmp, &dev_list, list) { | |
320 | /* FIXME: take fist available aes core */ | |
321 | dd = tmp; | |
322 | break; | |
323 | } | |
324 | ctx->dd = dd; | |
325 | } else { | |
326 | /* already found before */ | |
327 | dd = ctx->dd; | |
328 | } | |
329 | spin_unlock_bh(&list_lock); | |
330 | ||
331 | return dd; | |
332 | } | |
333 | ||
ebedbf79 MG |
334 | static void omap_aes_dma_out_callback(void *data) |
335 | { | |
336 | struct omap_aes_dev *dd = data; | |
337 | ||
338 | /* dma_lch_out - completed */ | |
339 | tasklet_schedule(&dd->done_task); | |
340 | } | |
537559a5 DK |
341 | |
342 | static int omap_aes_dma_init(struct omap_aes_dev *dd) | |
343 | { | |
344 | int err = -ENOMEM; | |
ebedbf79 | 345 | dma_cap_mask_t mask; |
537559a5 | 346 | |
ebedbf79 MG |
347 | dd->dma_lch_out = NULL; |
348 | dd->dma_lch_in = NULL; | |
537559a5 DK |
349 | |
350 | dd->buf_in = (void *)__get_free_pages(GFP_KERNEL, OMAP_AES_CACHE_SIZE); | |
351 | dd->buf_out = (void *)__get_free_pages(GFP_KERNEL, OMAP_AES_CACHE_SIZE); | |
352 | dd->buflen = PAGE_SIZE << OMAP_AES_CACHE_SIZE; | |
353 | dd->buflen &= ~(AES_BLOCK_SIZE - 1); | |
354 | ||
355 | if (!dd->buf_in || !dd->buf_out) { | |
356 | dev_err(dd->dev, "unable to alloc pages.\n"); | |
357 | goto err_alloc; | |
358 | } | |
359 | ||
360 | /* MAP here */ | |
361 | dd->dma_addr_in = dma_map_single(dd->dev, dd->buf_in, dd->buflen, | |
362 | DMA_TO_DEVICE); | |
363 | if (dma_mapping_error(dd->dev, dd->dma_addr_in)) { | |
364 | dev_err(dd->dev, "dma %d bytes error\n", dd->buflen); | |
365 | err = -EINVAL; | |
366 | goto err_map_in; | |
367 | } | |
368 | ||
369 | dd->dma_addr_out = dma_map_single(dd->dev, dd->buf_out, dd->buflen, | |
370 | DMA_FROM_DEVICE); | |
371 | if (dma_mapping_error(dd->dev, dd->dma_addr_out)) { | |
372 | dev_err(dd->dev, "dma %d bytes error\n", dd->buflen); | |
373 | err = -EINVAL; | |
374 | goto err_map_out; | |
375 | } | |
376 | ||
ebedbf79 MG |
377 | dma_cap_zero(mask); |
378 | dma_cap_set(DMA_SLAVE, mask); | |
379 | ||
b4b87a93 MG |
380 | dd->dma_lch_in = dma_request_slave_channel_compat(mask, |
381 | omap_dma_filter_fn, | |
382 | &dd->dma_in, | |
383 | dd->dev, "rx"); | |
ebedbf79 MG |
384 | if (!dd->dma_lch_in) { |
385 | dev_err(dd->dev, "Unable to request in DMA channel\n"); | |
386 | goto err_dma_in; | |
387 | } | |
388 | ||
b4b87a93 MG |
389 | dd->dma_lch_out = dma_request_slave_channel_compat(mask, |
390 | omap_dma_filter_fn, | |
391 | &dd->dma_out, | |
392 | dd->dev, "tx"); | |
ebedbf79 MG |
393 | if (!dd->dma_lch_out) { |
394 | dev_err(dd->dev, "Unable to request out DMA channel\n"); | |
395 | goto err_dma_out; | |
396 | } | |
537559a5 | 397 | |
537559a5 DK |
398 | return 0; |
399 | ||
400 | err_dma_out: | |
ebedbf79 | 401 | dma_release_channel(dd->dma_lch_in); |
537559a5 DK |
402 | err_dma_in: |
403 | dma_unmap_single(dd->dev, dd->dma_addr_out, dd->buflen, | |
404 | DMA_FROM_DEVICE); | |
405 | err_map_out: | |
406 | dma_unmap_single(dd->dev, dd->dma_addr_in, dd->buflen, DMA_TO_DEVICE); | |
407 | err_map_in: | |
408 | free_pages((unsigned long)dd->buf_out, OMAP_AES_CACHE_SIZE); | |
409 | free_pages((unsigned long)dd->buf_in, OMAP_AES_CACHE_SIZE); | |
410 | err_alloc: | |
411 | if (err) | |
412 | pr_err("error: %d\n", err); | |
413 | return err; | |
414 | } | |
415 | ||
416 | static void omap_aes_dma_cleanup(struct omap_aes_dev *dd) | |
417 | { | |
ebedbf79 MG |
418 | dma_release_channel(dd->dma_lch_out); |
419 | dma_release_channel(dd->dma_lch_in); | |
537559a5 DK |
420 | dma_unmap_single(dd->dev, dd->dma_addr_out, dd->buflen, |
421 | DMA_FROM_DEVICE); | |
422 | dma_unmap_single(dd->dev, dd->dma_addr_in, dd->buflen, DMA_TO_DEVICE); | |
423 | free_pages((unsigned long)dd->buf_out, OMAP_AES_CACHE_SIZE); | |
424 | free_pages((unsigned long)dd->buf_in, OMAP_AES_CACHE_SIZE); | |
425 | } | |
426 | ||
427 | static void sg_copy_buf(void *buf, struct scatterlist *sg, | |
428 | unsigned int start, unsigned int nbytes, int out) | |
429 | { | |
430 | struct scatter_walk walk; | |
431 | ||
432 | if (!nbytes) | |
433 | return; | |
434 | ||
435 | scatterwalk_start(&walk, sg); | |
436 | scatterwalk_advance(&walk, start); | |
437 | scatterwalk_copychunks(buf, &walk, nbytes, out); | |
438 | scatterwalk_done(&walk, out, 0); | |
439 | } | |
440 | ||
441 | static int sg_copy(struct scatterlist **sg, size_t *offset, void *buf, | |
442 | size_t buflen, size_t total, int out) | |
443 | { | |
444 | unsigned int count, off = 0; | |
445 | ||
446 | while (buflen && total) { | |
447 | count = min((*sg)->length - *offset, total); | |
448 | count = min(count, buflen); | |
449 | ||
450 | if (!count) | |
451 | return off; | |
452 | ||
21fe9767 DK |
453 | /* |
454 | * buflen and total are AES_BLOCK_SIZE size aligned, | |
455 | * so count should be also aligned | |
456 | */ | |
457 | ||
537559a5 DK |
458 | sg_copy_buf(buf + off, *sg, *offset, count, out); |
459 | ||
460 | off += count; | |
461 | buflen -= count; | |
462 | *offset += count; | |
463 | total -= count; | |
464 | ||
465 | if (*offset == (*sg)->length) { | |
466 | *sg = sg_next(*sg); | |
467 | if (*sg) | |
468 | *offset = 0; | |
469 | else | |
470 | total = 0; | |
471 | } | |
472 | } | |
473 | ||
474 | return off; | |
475 | } | |
476 | ||
ebedbf79 MG |
477 | static int omap_aes_crypt_dma(struct crypto_tfm *tfm, |
478 | struct scatterlist *in_sg, struct scatterlist *out_sg) | |
537559a5 DK |
479 | { |
480 | struct omap_aes_ctx *ctx = crypto_tfm_ctx(tfm); | |
481 | struct omap_aes_dev *dd = ctx->dd; | |
ebedbf79 MG |
482 | struct dma_async_tx_descriptor *tx_in, *tx_out; |
483 | struct dma_slave_config cfg; | |
484 | dma_addr_t dma_addr_in = sg_dma_address(in_sg); | |
485 | int ret, length = sg_dma_len(in_sg); | |
537559a5 DK |
486 | |
487 | pr_debug("len: %d\n", length); | |
488 | ||
489 | dd->dma_size = length; | |
490 | ||
491 | if (!(dd->flags & FLAGS_FAST)) | |
492 | dma_sync_single_for_device(dd->dev, dma_addr_in, length, | |
493 | DMA_TO_DEVICE); | |
494 | ||
ebedbf79 MG |
495 | memset(&cfg, 0, sizeof(cfg)); |
496 | ||
0d35583a MG |
497 | cfg.src_addr = dd->phys_base + AES_REG_DATA_N(dd, 0); |
498 | cfg.dst_addr = dd->phys_base + AES_REG_DATA_N(dd, 0); | |
ebedbf79 MG |
499 | cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; |
500 | cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; | |
501 | cfg.src_maxburst = DST_MAXBURST; | |
502 | cfg.dst_maxburst = DST_MAXBURST; | |
503 | ||
504 | /* IN */ | |
505 | ret = dmaengine_slave_config(dd->dma_lch_in, &cfg); | |
506 | if (ret) { | |
507 | dev_err(dd->dev, "can't configure IN dmaengine slave: %d\n", | |
508 | ret); | |
509 | return ret; | |
510 | } | |
511 | ||
512 | tx_in = dmaengine_prep_slave_sg(dd->dma_lch_in, in_sg, 1, | |
513 | DMA_MEM_TO_DEV, | |
514 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); | |
515 | if (!tx_in) { | |
516 | dev_err(dd->dev, "IN prep_slave_sg() failed\n"); | |
517 | return -EINVAL; | |
518 | } | |
519 | ||
520 | /* No callback necessary */ | |
521 | tx_in->callback_param = dd; | |
522 | ||
523 | /* OUT */ | |
524 | ret = dmaengine_slave_config(dd->dma_lch_out, &cfg); | |
525 | if (ret) { | |
526 | dev_err(dd->dev, "can't configure OUT dmaengine slave: %d\n", | |
527 | ret); | |
528 | return ret; | |
529 | } | |
530 | ||
531 | tx_out = dmaengine_prep_slave_sg(dd->dma_lch_out, out_sg, 1, | |
532 | DMA_DEV_TO_MEM, | |
533 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); | |
534 | if (!tx_out) { | |
535 | dev_err(dd->dev, "OUT prep_slave_sg() failed\n"); | |
536 | return -EINVAL; | |
537 | } | |
538 | ||
539 | tx_out->callback = omap_aes_dma_out_callback; | |
540 | tx_out->callback_param = dd; | |
541 | ||
542 | dmaengine_submit(tx_in); | |
543 | dmaengine_submit(tx_out); | |
544 | ||
545 | dma_async_issue_pending(dd->dma_lch_in); | |
546 | dma_async_issue_pending(dd->dma_lch_out); | |
537559a5 | 547 | |
0d35583a MG |
548 | /* start DMA */ |
549 | dd->pdata->trigger(dd, length); | |
83ea7e0f | 550 | |
537559a5 DK |
551 | return 0; |
552 | } | |
553 | ||
554 | static int omap_aes_crypt_dma_start(struct omap_aes_dev *dd) | |
555 | { | |
556 | struct crypto_tfm *tfm = crypto_ablkcipher_tfm( | |
557 | crypto_ablkcipher_reqtfm(dd->req)); | |
558 | int err, fast = 0, in, out; | |
559 | size_t count; | |
560 | dma_addr_t addr_in, addr_out; | |
ebedbf79 MG |
561 | struct scatterlist *in_sg, *out_sg; |
562 | int len32; | |
537559a5 DK |
563 | |
564 | pr_debug("total: %d\n", dd->total); | |
565 | ||
566 | if (sg_is_last(dd->in_sg) && sg_is_last(dd->out_sg)) { | |
567 | /* check for alignment */ | |
568 | in = IS_ALIGNED((u32)dd->in_sg->offset, sizeof(u32)); | |
569 | out = IS_ALIGNED((u32)dd->out_sg->offset, sizeof(u32)); | |
570 | ||
571 | fast = in && out; | |
572 | } | |
573 | ||
574 | if (fast) { | |
575 | count = min(dd->total, sg_dma_len(dd->in_sg)); | |
576 | count = min(count, sg_dma_len(dd->out_sg)); | |
577 | ||
21fe9767 DK |
578 | if (count != dd->total) { |
579 | pr_err("request length != buffer length\n"); | |
537559a5 | 580 | return -EINVAL; |
21fe9767 | 581 | } |
537559a5 DK |
582 | |
583 | pr_debug("fast\n"); | |
584 | ||
585 | err = dma_map_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE); | |
586 | if (!err) { | |
587 | dev_err(dd->dev, "dma_map_sg() error\n"); | |
588 | return -EINVAL; | |
589 | } | |
590 | ||
591 | err = dma_map_sg(dd->dev, dd->out_sg, 1, DMA_FROM_DEVICE); | |
592 | if (!err) { | |
593 | dev_err(dd->dev, "dma_map_sg() error\n"); | |
594 | dma_unmap_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE); | |
595 | return -EINVAL; | |
596 | } | |
597 | ||
598 | addr_in = sg_dma_address(dd->in_sg); | |
599 | addr_out = sg_dma_address(dd->out_sg); | |
600 | ||
ebedbf79 MG |
601 | in_sg = dd->in_sg; |
602 | out_sg = dd->out_sg; | |
ebedbf79 | 603 | |
537559a5 DK |
604 | dd->flags |= FLAGS_FAST; |
605 | ||
606 | } else { | |
607 | /* use cache buffers */ | |
608 | count = sg_copy(&dd->in_sg, &dd->in_offset, dd->buf_in, | |
609 | dd->buflen, dd->total, 0); | |
610 | ||
ebedbf79 MG |
611 | len32 = DIV_ROUND_UP(count, DMA_MIN) * DMA_MIN; |
612 | ||
613 | /* | |
614 | * The data going into the AES module has been copied | |
615 | * to a local buffer and the data coming out will go | |
616 | * into a local buffer so set up local SG entries for | |
617 | * both. | |
618 | */ | |
619 | sg_init_table(&dd->in_sgl, 1); | |
620 | dd->in_sgl.offset = dd->in_offset; | |
621 | sg_dma_len(&dd->in_sgl) = len32; | |
622 | sg_dma_address(&dd->in_sgl) = dd->dma_addr_in; | |
623 | ||
624 | sg_init_table(&dd->out_sgl, 1); | |
625 | dd->out_sgl.offset = dd->out_offset; | |
626 | sg_dma_len(&dd->out_sgl) = len32; | |
627 | sg_dma_address(&dd->out_sgl) = dd->dma_addr_out; | |
628 | ||
629 | in_sg = &dd->in_sgl; | |
630 | out_sg = &dd->out_sgl; | |
ebedbf79 | 631 | |
537559a5 DK |
632 | addr_in = dd->dma_addr_in; |
633 | addr_out = dd->dma_addr_out; | |
634 | ||
635 | dd->flags &= ~FLAGS_FAST; | |
636 | ||
637 | } | |
638 | ||
639 | dd->total -= count; | |
640 | ||
ebedbf79 | 641 | err = omap_aes_crypt_dma(tfm, in_sg, out_sg); |
21fe9767 DK |
642 | if (err) { |
643 | dma_unmap_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE); | |
644 | dma_unmap_sg(dd->dev, dd->out_sg, 1, DMA_TO_DEVICE); | |
645 | } | |
537559a5 DK |
646 | |
647 | return err; | |
648 | } | |
649 | ||
650 | static void omap_aes_finish_req(struct omap_aes_dev *dd, int err) | |
651 | { | |
21fe9767 | 652 | struct ablkcipher_request *req = dd->req; |
537559a5 DK |
653 | |
654 | pr_debug("err: %d\n", err); | |
655 | ||
eeb2b202 DK |
656 | dd->flags &= ~FLAGS_BUSY; |
657 | ||
67a730ce | 658 | req->base.complete(&req->base, err); |
537559a5 DK |
659 | } |
660 | ||
661 | static int omap_aes_crypt_dma_stop(struct omap_aes_dev *dd) | |
662 | { | |
663 | int err = 0; | |
664 | size_t count; | |
665 | ||
666 | pr_debug("total: %d\n", dd->total); | |
667 | ||
0d35583a | 668 | omap_aes_dma_stop(dd); |
537559a5 | 669 | |
ebedbf79 MG |
670 | dmaengine_terminate_all(dd->dma_lch_in); |
671 | dmaengine_terminate_all(dd->dma_lch_out); | |
537559a5 DK |
672 | |
673 | if (dd->flags & FLAGS_FAST) { | |
674 | dma_unmap_sg(dd->dev, dd->out_sg, 1, DMA_FROM_DEVICE); | |
675 | dma_unmap_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE); | |
676 | } else { | |
677 | dma_sync_single_for_device(dd->dev, dd->dma_addr_out, | |
678 | dd->dma_size, DMA_FROM_DEVICE); | |
679 | ||
680 | /* copy data */ | |
681 | count = sg_copy(&dd->out_sg, &dd->out_offset, dd->buf_out, | |
682 | dd->buflen, dd->dma_size, 1); | |
683 | if (count != dd->dma_size) { | |
684 | err = -EINVAL; | |
685 | pr_err("not all data converted: %u\n", count); | |
686 | } | |
687 | } | |
688 | ||
537559a5 DK |
689 | return err; |
690 | } | |
691 | ||
21fe9767 | 692 | static int omap_aes_handle_queue(struct omap_aes_dev *dd, |
eeb2b202 | 693 | struct ablkcipher_request *req) |
537559a5 DK |
694 | { |
695 | struct crypto_async_request *async_req, *backlog; | |
696 | struct omap_aes_ctx *ctx; | |
697 | struct omap_aes_reqctx *rctx; | |
537559a5 | 698 | unsigned long flags; |
21fe9767 | 699 | int err, ret = 0; |
537559a5 DK |
700 | |
701 | spin_lock_irqsave(&dd->lock, flags); | |
eeb2b202 | 702 | if (req) |
21fe9767 | 703 | ret = ablkcipher_enqueue_request(&dd->queue, req); |
eeb2b202 DK |
704 | if (dd->flags & FLAGS_BUSY) { |
705 | spin_unlock_irqrestore(&dd->lock, flags); | |
21fe9767 | 706 | return ret; |
eeb2b202 | 707 | } |
537559a5 DK |
708 | backlog = crypto_get_backlog(&dd->queue); |
709 | async_req = crypto_dequeue_request(&dd->queue); | |
eeb2b202 DK |
710 | if (async_req) |
711 | dd->flags |= FLAGS_BUSY; | |
537559a5 DK |
712 | spin_unlock_irqrestore(&dd->lock, flags); |
713 | ||
714 | if (!async_req) | |
21fe9767 | 715 | return ret; |
537559a5 DK |
716 | |
717 | if (backlog) | |
718 | backlog->complete(backlog, -EINPROGRESS); | |
719 | ||
720 | req = ablkcipher_request_cast(async_req); | |
721 | ||
537559a5 DK |
722 | /* assign new request to device */ |
723 | dd->req = req; | |
724 | dd->total = req->nbytes; | |
725 | dd->in_offset = 0; | |
726 | dd->in_sg = req->src; | |
727 | dd->out_offset = 0; | |
728 | dd->out_sg = req->dst; | |
729 | ||
e77c756e JF |
730 | dd->in_sg_len = scatterwalk_bytes_sglen(dd->in_sg, dd->total); |
731 | dd->out_sg_len = scatterwalk_bytes_sglen(dd->out_sg, dd->total); | |
732 | BUG_ON(dd->in_sg_len < 0 || dd->out_sg_len < 0); | |
733 | ||
537559a5 DK |
734 | rctx = ablkcipher_request_ctx(req); |
735 | ctx = crypto_ablkcipher_ctx(crypto_ablkcipher_reqtfm(req)); | |
736 | rctx->mode &= FLAGS_MODE_MASK; | |
737 | dd->flags = (dd->flags & ~FLAGS_MODE_MASK) | rctx->mode; | |
738 | ||
67a730ce | 739 | dd->ctx = ctx; |
537559a5 | 740 | ctx->dd = dd; |
537559a5 | 741 | |
83ea7e0f DK |
742 | err = omap_aes_write_ctrl(dd); |
743 | if (!err) | |
744 | err = omap_aes_crypt_dma_start(dd); | |
21fe9767 DK |
745 | if (err) { |
746 | /* aes_task will not finish it, so do it here */ | |
747 | omap_aes_finish_req(dd, err); | |
748 | tasklet_schedule(&dd->queue_task); | |
749 | } | |
eeb2b202 | 750 | |
21fe9767 | 751 | return ret; /* return ret, which is enqueue return value */ |
537559a5 DK |
752 | } |
753 | ||
21fe9767 | 754 | static void omap_aes_done_task(unsigned long data) |
537559a5 DK |
755 | { |
756 | struct omap_aes_dev *dd = (struct omap_aes_dev *)data; | |
21fe9767 | 757 | int err; |
537559a5 DK |
758 | |
759 | pr_debug("enter\n"); | |
760 | ||
21fe9767 | 761 | err = omap_aes_crypt_dma_stop(dd); |
537559a5 | 762 | |
21fe9767 DK |
763 | err = dd->err ? : err; |
764 | ||
765 | if (dd->total && !err) { | |
766 | err = omap_aes_crypt_dma_start(dd); | |
767 | if (!err) | |
768 | return; /* DMA started. Not fininishing. */ | |
769 | } | |
770 | ||
771 | omap_aes_finish_req(dd, err); | |
772 | omap_aes_handle_queue(dd, NULL); | |
537559a5 DK |
773 | |
774 | pr_debug("exit\n"); | |
775 | } | |
776 | ||
21fe9767 DK |
777 | static void omap_aes_queue_task(unsigned long data) |
778 | { | |
779 | struct omap_aes_dev *dd = (struct omap_aes_dev *)data; | |
780 | ||
781 | omap_aes_handle_queue(dd, NULL); | |
782 | } | |
783 | ||
537559a5 DK |
784 | static int omap_aes_crypt(struct ablkcipher_request *req, unsigned long mode) |
785 | { | |
786 | struct omap_aes_ctx *ctx = crypto_ablkcipher_ctx( | |
787 | crypto_ablkcipher_reqtfm(req)); | |
788 | struct omap_aes_reqctx *rctx = ablkcipher_request_ctx(req); | |
789 | struct omap_aes_dev *dd; | |
537559a5 DK |
790 | |
791 | pr_debug("nbytes: %d, enc: %d, cbc: %d\n", req->nbytes, | |
792 | !!(mode & FLAGS_ENCRYPT), | |
793 | !!(mode & FLAGS_CBC)); | |
794 | ||
21fe9767 DK |
795 | if (!IS_ALIGNED(req->nbytes, AES_BLOCK_SIZE)) { |
796 | pr_err("request size is not exact amount of AES blocks\n"); | |
797 | return -EINVAL; | |
798 | } | |
799 | ||
537559a5 DK |
800 | dd = omap_aes_find_dev(ctx); |
801 | if (!dd) | |
802 | return -ENODEV; | |
803 | ||
804 | rctx->mode = mode; | |
805 | ||
21fe9767 | 806 | return omap_aes_handle_queue(dd, req); |
537559a5 DK |
807 | } |
808 | ||
809 | /* ********************** ALG API ************************************ */ | |
810 | ||
811 | static int omap_aes_setkey(struct crypto_ablkcipher *tfm, const u8 *key, | |
812 | unsigned int keylen) | |
813 | { | |
814 | struct omap_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm); | |
815 | ||
816 | if (keylen != AES_KEYSIZE_128 && keylen != AES_KEYSIZE_192 && | |
817 | keylen != AES_KEYSIZE_256) | |
818 | return -EINVAL; | |
819 | ||
820 | pr_debug("enter, keylen: %d\n", keylen); | |
821 | ||
822 | memcpy(ctx->key, key, keylen); | |
823 | ctx->keylen = keylen; | |
537559a5 DK |
824 | |
825 | return 0; | |
826 | } | |
827 | ||
828 | static int omap_aes_ecb_encrypt(struct ablkcipher_request *req) | |
829 | { | |
830 | return omap_aes_crypt(req, FLAGS_ENCRYPT); | |
831 | } | |
832 | ||
833 | static int omap_aes_ecb_decrypt(struct ablkcipher_request *req) | |
834 | { | |
835 | return omap_aes_crypt(req, 0); | |
836 | } | |
837 | ||
838 | static int omap_aes_cbc_encrypt(struct ablkcipher_request *req) | |
839 | { | |
840 | return omap_aes_crypt(req, FLAGS_ENCRYPT | FLAGS_CBC); | |
841 | } | |
842 | ||
843 | static int omap_aes_cbc_decrypt(struct ablkcipher_request *req) | |
844 | { | |
845 | return omap_aes_crypt(req, FLAGS_CBC); | |
846 | } | |
847 | ||
f9fb69e7 MG |
848 | static int omap_aes_ctr_encrypt(struct ablkcipher_request *req) |
849 | { | |
850 | return omap_aes_crypt(req, FLAGS_ENCRYPT | FLAGS_CTR); | |
851 | } | |
852 | ||
853 | static int omap_aes_ctr_decrypt(struct ablkcipher_request *req) | |
854 | { | |
855 | return omap_aes_crypt(req, FLAGS_CTR); | |
856 | } | |
857 | ||
537559a5 DK |
858 | static int omap_aes_cra_init(struct crypto_tfm *tfm) |
859 | { | |
a3485e68 JF |
860 | struct omap_aes_dev *dd = NULL; |
861 | ||
862 | /* Find AES device, currently picks the first device */ | |
863 | spin_lock_bh(&list_lock); | |
864 | list_for_each_entry(dd, &dev_list, list) { | |
865 | break; | |
866 | } | |
867 | spin_unlock_bh(&list_lock); | |
537559a5 | 868 | |
a3485e68 | 869 | pm_runtime_get_sync(dd->dev); |
537559a5 DK |
870 | tfm->crt_ablkcipher.reqsize = sizeof(struct omap_aes_reqctx); |
871 | ||
872 | return 0; | |
873 | } | |
874 | ||
875 | static void omap_aes_cra_exit(struct crypto_tfm *tfm) | |
876 | { | |
a3485e68 JF |
877 | struct omap_aes_dev *dd = NULL; |
878 | ||
879 | /* Find AES device, currently picks the first device */ | |
880 | spin_lock_bh(&list_lock); | |
881 | list_for_each_entry(dd, &dev_list, list) { | |
882 | break; | |
883 | } | |
884 | spin_unlock_bh(&list_lock); | |
885 | ||
886 | pm_runtime_put_sync(dd->dev); | |
537559a5 DK |
887 | } |
888 | ||
889 | /* ********************** ALGS ************************************ */ | |
890 | ||
f9fb69e7 | 891 | static struct crypto_alg algs_ecb_cbc[] = { |
537559a5 DK |
892 | { |
893 | .cra_name = "ecb(aes)", | |
894 | .cra_driver_name = "ecb-aes-omap", | |
895 | .cra_priority = 100, | |
d912bb76 NM |
896 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | |
897 | CRYPTO_ALG_KERN_DRIVER_ONLY | | |
898 | CRYPTO_ALG_ASYNC, | |
537559a5 DK |
899 | .cra_blocksize = AES_BLOCK_SIZE, |
900 | .cra_ctxsize = sizeof(struct omap_aes_ctx), | |
efce41b6 | 901 | .cra_alignmask = 0, |
537559a5 DK |
902 | .cra_type = &crypto_ablkcipher_type, |
903 | .cra_module = THIS_MODULE, | |
904 | .cra_init = omap_aes_cra_init, | |
905 | .cra_exit = omap_aes_cra_exit, | |
906 | .cra_u.ablkcipher = { | |
907 | .min_keysize = AES_MIN_KEY_SIZE, | |
908 | .max_keysize = AES_MAX_KEY_SIZE, | |
909 | .setkey = omap_aes_setkey, | |
910 | .encrypt = omap_aes_ecb_encrypt, | |
911 | .decrypt = omap_aes_ecb_decrypt, | |
912 | } | |
913 | }, | |
914 | { | |
915 | .cra_name = "cbc(aes)", | |
916 | .cra_driver_name = "cbc-aes-omap", | |
917 | .cra_priority = 100, | |
d912bb76 NM |
918 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | |
919 | CRYPTO_ALG_KERN_DRIVER_ONLY | | |
920 | CRYPTO_ALG_ASYNC, | |
537559a5 DK |
921 | .cra_blocksize = AES_BLOCK_SIZE, |
922 | .cra_ctxsize = sizeof(struct omap_aes_ctx), | |
efce41b6 | 923 | .cra_alignmask = 0, |
537559a5 DK |
924 | .cra_type = &crypto_ablkcipher_type, |
925 | .cra_module = THIS_MODULE, | |
926 | .cra_init = omap_aes_cra_init, | |
927 | .cra_exit = omap_aes_cra_exit, | |
928 | .cra_u.ablkcipher = { | |
929 | .min_keysize = AES_MIN_KEY_SIZE, | |
930 | .max_keysize = AES_MAX_KEY_SIZE, | |
931 | .ivsize = AES_BLOCK_SIZE, | |
932 | .setkey = omap_aes_setkey, | |
933 | .encrypt = omap_aes_cbc_encrypt, | |
934 | .decrypt = omap_aes_cbc_decrypt, | |
935 | } | |
936 | } | |
937 | }; | |
938 | ||
f9fb69e7 MG |
939 | static struct crypto_alg algs_ctr[] = { |
940 | { | |
941 | .cra_name = "ctr(aes)", | |
942 | .cra_driver_name = "ctr-aes-omap", | |
943 | .cra_priority = 100, | |
944 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | | |
945 | CRYPTO_ALG_KERN_DRIVER_ONLY | | |
946 | CRYPTO_ALG_ASYNC, | |
947 | .cra_blocksize = AES_BLOCK_SIZE, | |
948 | .cra_ctxsize = sizeof(struct omap_aes_ctx), | |
949 | .cra_alignmask = 0, | |
950 | .cra_type = &crypto_ablkcipher_type, | |
951 | .cra_module = THIS_MODULE, | |
952 | .cra_init = omap_aes_cra_init, | |
953 | .cra_exit = omap_aes_cra_exit, | |
954 | .cra_u.ablkcipher = { | |
955 | .min_keysize = AES_MIN_KEY_SIZE, | |
956 | .max_keysize = AES_MAX_KEY_SIZE, | |
957 | .geniv = "eseqiv", | |
958 | .ivsize = AES_BLOCK_SIZE, | |
959 | .setkey = omap_aes_setkey, | |
960 | .encrypt = omap_aes_ctr_encrypt, | |
961 | .decrypt = omap_aes_ctr_decrypt, | |
962 | } | |
963 | } , | |
964 | }; | |
965 | ||
966 | static struct omap_aes_algs_info omap_aes_algs_info_ecb_cbc[] = { | |
967 | { | |
968 | .algs_list = algs_ecb_cbc, | |
969 | .size = ARRAY_SIZE(algs_ecb_cbc), | |
970 | }, | |
971 | }; | |
972 | ||
0d35583a | 973 | static const struct omap_aes_pdata omap_aes_pdata_omap2 = { |
f9fb69e7 MG |
974 | .algs_info = omap_aes_algs_info_ecb_cbc, |
975 | .algs_info_size = ARRAY_SIZE(omap_aes_algs_info_ecb_cbc), | |
0d35583a MG |
976 | .trigger = omap_aes_dma_trigger_omap2, |
977 | .key_ofs = 0x1c, | |
978 | .iv_ofs = 0x20, | |
979 | .ctrl_ofs = 0x30, | |
980 | .data_ofs = 0x34, | |
981 | .rev_ofs = 0x44, | |
982 | .mask_ofs = 0x48, | |
983 | .dma_enable_in = BIT(2), | |
984 | .dma_enable_out = BIT(3), | |
985 | .dma_start = BIT(5), | |
986 | .major_mask = 0xf0, | |
987 | .major_shift = 4, | |
988 | .minor_mask = 0x0f, | |
989 | .minor_shift = 0, | |
990 | }; | |
991 | ||
bc69d124 | 992 | #ifdef CONFIG_OF |
f9fb69e7 MG |
993 | static struct omap_aes_algs_info omap_aes_algs_info_ecb_cbc_ctr[] = { |
994 | { | |
995 | .algs_list = algs_ecb_cbc, | |
996 | .size = ARRAY_SIZE(algs_ecb_cbc), | |
997 | }, | |
998 | { | |
999 | .algs_list = algs_ctr, | |
1000 | .size = ARRAY_SIZE(algs_ctr), | |
1001 | }, | |
1002 | }; | |
1003 | ||
1004 | static const struct omap_aes_pdata omap_aes_pdata_omap3 = { | |
1005 | .algs_info = omap_aes_algs_info_ecb_cbc_ctr, | |
1006 | .algs_info_size = ARRAY_SIZE(omap_aes_algs_info_ecb_cbc_ctr), | |
1007 | .trigger = omap_aes_dma_trigger_omap2, | |
1008 | .key_ofs = 0x1c, | |
1009 | .iv_ofs = 0x20, | |
1010 | .ctrl_ofs = 0x30, | |
1011 | .data_ofs = 0x34, | |
1012 | .rev_ofs = 0x44, | |
1013 | .mask_ofs = 0x48, | |
1014 | .dma_enable_in = BIT(2), | |
1015 | .dma_enable_out = BIT(3), | |
1016 | .dma_start = BIT(5), | |
1017 | .major_mask = 0xf0, | |
1018 | .major_shift = 4, | |
1019 | .minor_mask = 0x0f, | |
1020 | .minor_shift = 0, | |
1021 | }; | |
1022 | ||
0d35583a | 1023 | static const struct omap_aes_pdata omap_aes_pdata_omap4 = { |
f9fb69e7 MG |
1024 | .algs_info = omap_aes_algs_info_ecb_cbc_ctr, |
1025 | .algs_info_size = ARRAY_SIZE(omap_aes_algs_info_ecb_cbc_ctr), | |
0d35583a MG |
1026 | .trigger = omap_aes_dma_trigger_omap4, |
1027 | .key_ofs = 0x3c, | |
1028 | .iv_ofs = 0x40, | |
1029 | .ctrl_ofs = 0x50, | |
1030 | .data_ofs = 0x60, | |
1031 | .rev_ofs = 0x80, | |
1032 | .mask_ofs = 0x84, | |
1033 | .dma_enable_in = BIT(5), | |
1034 | .dma_enable_out = BIT(6), | |
1035 | .major_mask = 0x0700, | |
1036 | .major_shift = 8, | |
1037 | .minor_mask = 0x003f, | |
1038 | .minor_shift = 0, | |
1039 | }; | |
1040 | ||
bc69d124 MG |
1041 | static const struct of_device_id omap_aes_of_match[] = { |
1042 | { | |
1043 | .compatible = "ti,omap2-aes", | |
0d35583a MG |
1044 | .data = &omap_aes_pdata_omap2, |
1045 | }, | |
f9fb69e7 MG |
1046 | { |
1047 | .compatible = "ti,omap3-aes", | |
1048 | .data = &omap_aes_pdata_omap3, | |
1049 | }, | |
0d35583a MG |
1050 | { |
1051 | .compatible = "ti,omap4-aes", | |
1052 | .data = &omap_aes_pdata_omap4, | |
bc69d124 MG |
1053 | }, |
1054 | {}, | |
1055 | }; | |
1056 | MODULE_DEVICE_TABLE(of, omap_aes_of_match); | |
1057 | ||
1058 | static int omap_aes_get_res_of(struct omap_aes_dev *dd, | |
1059 | struct device *dev, struct resource *res) | |
1060 | { | |
1061 | struct device_node *node = dev->of_node; | |
1062 | const struct of_device_id *match; | |
1063 | int err = 0; | |
1064 | ||
1065 | match = of_match_device(of_match_ptr(omap_aes_of_match), dev); | |
1066 | if (!match) { | |
1067 | dev_err(dev, "no compatible OF match\n"); | |
1068 | err = -EINVAL; | |
1069 | goto err; | |
1070 | } | |
1071 | ||
1072 | err = of_address_to_resource(node, 0, res); | |
1073 | if (err < 0) { | |
1074 | dev_err(dev, "can't translate OF node address\n"); | |
1075 | err = -EINVAL; | |
1076 | goto err; | |
1077 | } | |
1078 | ||
1079 | dd->dma_out = -1; /* Dummy value that's unused */ | |
1080 | dd->dma_in = -1; /* Dummy value that's unused */ | |
1081 | ||
0d35583a MG |
1082 | dd->pdata = match->data; |
1083 | ||
bc69d124 MG |
1084 | err: |
1085 | return err; | |
1086 | } | |
1087 | #else | |
1088 | static const struct of_device_id omap_aes_of_match[] = { | |
1089 | {}, | |
1090 | }; | |
1091 | ||
1092 | static int omap_aes_get_res_of(struct omap_aes_dev *dd, | |
1093 | struct device *dev, struct resource *res) | |
1094 | { | |
1095 | return -EINVAL; | |
1096 | } | |
1097 | #endif | |
1098 | ||
1099 | static int omap_aes_get_res_pdev(struct omap_aes_dev *dd, | |
1100 | struct platform_device *pdev, struct resource *res) | |
1101 | { | |
1102 | struct device *dev = &pdev->dev; | |
1103 | struct resource *r; | |
1104 | int err = 0; | |
1105 | ||
1106 | /* Get the base address */ | |
1107 | r = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1108 | if (!r) { | |
1109 | dev_err(dev, "no MEM resource info\n"); | |
1110 | err = -ENODEV; | |
1111 | goto err; | |
1112 | } | |
1113 | memcpy(res, r, sizeof(*res)); | |
1114 | ||
1115 | /* Get the DMA out channel */ | |
1116 | r = platform_get_resource(pdev, IORESOURCE_DMA, 0); | |
1117 | if (!r) { | |
1118 | dev_err(dev, "no DMA out resource info\n"); | |
1119 | err = -ENODEV; | |
1120 | goto err; | |
1121 | } | |
1122 | dd->dma_out = r->start; | |
1123 | ||
1124 | /* Get the DMA in channel */ | |
1125 | r = platform_get_resource(pdev, IORESOURCE_DMA, 1); | |
1126 | if (!r) { | |
1127 | dev_err(dev, "no DMA in resource info\n"); | |
1128 | err = -ENODEV; | |
1129 | goto err; | |
1130 | } | |
1131 | dd->dma_in = r->start; | |
1132 | ||
0d35583a MG |
1133 | /* Only OMAP2/3 can be non-DT */ |
1134 | dd->pdata = &omap_aes_pdata_omap2; | |
1135 | ||
bc69d124 MG |
1136 | err: |
1137 | return err; | |
1138 | } | |
1139 | ||
537559a5 DK |
1140 | static int omap_aes_probe(struct platform_device *pdev) |
1141 | { | |
1142 | struct device *dev = &pdev->dev; | |
1143 | struct omap_aes_dev *dd; | |
f9fb69e7 | 1144 | struct crypto_alg *algp; |
bc69d124 | 1145 | struct resource res; |
537559a5 DK |
1146 | int err = -ENOMEM, i, j; |
1147 | u32 reg; | |
1148 | ||
1149 | dd = kzalloc(sizeof(struct omap_aes_dev), GFP_KERNEL); | |
1150 | if (dd == NULL) { | |
1151 | dev_err(dev, "unable to alloc data struct.\n"); | |
1152 | goto err_data; | |
1153 | } | |
1154 | dd->dev = dev; | |
1155 | platform_set_drvdata(pdev, dd); | |
1156 | ||
1157 | spin_lock_init(&dd->lock); | |
1158 | crypto_init_queue(&dd->queue, OMAP_AES_QUEUE_LENGTH); | |
1159 | ||
bc69d124 MG |
1160 | err = (dev->of_node) ? omap_aes_get_res_of(dd, dev, &res) : |
1161 | omap_aes_get_res_pdev(dd, pdev, &res); | |
1162 | if (err) | |
537559a5 | 1163 | goto err_res; |
bc69d124 | 1164 | |
30862281 LN |
1165 | dd->io_base = devm_ioremap_resource(dev, &res); |
1166 | if (IS_ERR(dd->io_base)) { | |
1167 | err = PTR_ERR(dd->io_base); | |
5946c4a5 | 1168 | goto err_res; |
537559a5 | 1169 | } |
bc69d124 | 1170 | dd->phys_base = res.start; |
537559a5 | 1171 | |
5946c4a5 MG |
1172 | pm_runtime_enable(dev); |
1173 | pm_runtime_get_sync(dev); | |
1174 | ||
0d35583a MG |
1175 | omap_aes_dma_stop(dd); |
1176 | ||
1177 | reg = omap_aes_read(dd, AES_REG_REV(dd)); | |
5946c4a5 MG |
1178 | |
1179 | pm_runtime_put_sync(dev); | |
537559a5 | 1180 | |
0d35583a MG |
1181 | dev_info(dev, "OMAP AES hw accel rev: %u.%u\n", |
1182 | (reg & dd->pdata->major_mask) >> dd->pdata->major_shift, | |
1183 | (reg & dd->pdata->minor_mask) >> dd->pdata->minor_shift); | |
1184 | ||
21fe9767 DK |
1185 | tasklet_init(&dd->done_task, omap_aes_done_task, (unsigned long)dd); |
1186 | tasklet_init(&dd->queue_task, omap_aes_queue_task, (unsigned long)dd); | |
537559a5 DK |
1187 | |
1188 | err = omap_aes_dma_init(dd); | |
1189 | if (err) | |
1190 | goto err_dma; | |
1191 | ||
1192 | INIT_LIST_HEAD(&dd->list); | |
1193 | spin_lock(&list_lock); | |
1194 | list_add_tail(&dd->list, &dev_list); | |
1195 | spin_unlock(&list_lock); | |
1196 | ||
f9fb69e7 MG |
1197 | for (i = 0; i < dd->pdata->algs_info_size; i++) { |
1198 | for (j = 0; j < dd->pdata->algs_info[i].size; j++) { | |
1199 | algp = &dd->pdata->algs_info[i].algs_list[j]; | |
1200 | ||
1201 | pr_debug("reg alg: %s\n", algp->cra_name); | |
1202 | INIT_LIST_HEAD(&algp->cra_list); | |
1203 | ||
1204 | err = crypto_register_alg(algp); | |
1205 | if (err) | |
1206 | goto err_algs; | |
1207 | ||
1208 | dd->pdata->algs_info[i].registered++; | |
1209 | } | |
537559a5 DK |
1210 | } |
1211 | ||
537559a5 DK |
1212 | return 0; |
1213 | err_algs: | |
f9fb69e7 MG |
1214 | for (i = dd->pdata->algs_info_size - 1; i >= 0; i--) |
1215 | for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--) | |
1216 | crypto_unregister_alg( | |
1217 | &dd->pdata->algs_info[i].algs_list[j]); | |
537559a5 DK |
1218 | omap_aes_dma_cleanup(dd); |
1219 | err_dma: | |
21fe9767 DK |
1220 | tasklet_kill(&dd->done_task); |
1221 | tasklet_kill(&dd->queue_task); | |
5946c4a5 | 1222 | pm_runtime_disable(dev); |
537559a5 DK |
1223 | err_res: |
1224 | kfree(dd); | |
1225 | dd = NULL; | |
1226 | err_data: | |
1227 | dev_err(dev, "initialization failed.\n"); | |
1228 | return err; | |
1229 | } | |
1230 | ||
1231 | static int omap_aes_remove(struct platform_device *pdev) | |
1232 | { | |
1233 | struct omap_aes_dev *dd = platform_get_drvdata(pdev); | |
f9fb69e7 | 1234 | int i, j; |
537559a5 DK |
1235 | |
1236 | if (!dd) | |
1237 | return -ENODEV; | |
1238 | ||
1239 | spin_lock(&list_lock); | |
1240 | list_del(&dd->list); | |
1241 | spin_unlock(&list_lock); | |
1242 | ||
f9fb69e7 MG |
1243 | for (i = dd->pdata->algs_info_size - 1; i >= 0; i--) |
1244 | for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--) | |
1245 | crypto_unregister_alg( | |
1246 | &dd->pdata->algs_info[i].algs_list[j]); | |
537559a5 | 1247 | |
21fe9767 DK |
1248 | tasklet_kill(&dd->done_task); |
1249 | tasklet_kill(&dd->queue_task); | |
537559a5 | 1250 | omap_aes_dma_cleanup(dd); |
5946c4a5 | 1251 | pm_runtime_disable(dd->dev); |
537559a5 DK |
1252 | kfree(dd); |
1253 | dd = NULL; | |
1254 | ||
1255 | return 0; | |
1256 | } | |
1257 | ||
0635fb3a MG |
1258 | #ifdef CONFIG_PM_SLEEP |
1259 | static int omap_aes_suspend(struct device *dev) | |
1260 | { | |
1261 | pm_runtime_put_sync(dev); | |
1262 | return 0; | |
1263 | } | |
1264 | ||
1265 | static int omap_aes_resume(struct device *dev) | |
1266 | { | |
1267 | pm_runtime_get_sync(dev); | |
1268 | return 0; | |
1269 | } | |
1270 | #endif | |
1271 | ||
1272 | static const struct dev_pm_ops omap_aes_pm_ops = { | |
1273 | SET_SYSTEM_SLEEP_PM_OPS(omap_aes_suspend, omap_aes_resume) | |
1274 | }; | |
1275 | ||
537559a5 DK |
1276 | static struct platform_driver omap_aes_driver = { |
1277 | .probe = omap_aes_probe, | |
1278 | .remove = omap_aes_remove, | |
1279 | .driver = { | |
1280 | .name = "omap-aes", | |
1281 | .owner = THIS_MODULE, | |
0635fb3a | 1282 | .pm = &omap_aes_pm_ops, |
bc69d124 | 1283 | .of_match_table = omap_aes_of_match, |
537559a5 DK |
1284 | }, |
1285 | }; | |
1286 | ||
94e51df9 | 1287 | module_platform_driver(omap_aes_driver); |
537559a5 DK |
1288 | |
1289 | MODULE_DESCRIPTION("OMAP AES hw acceleration support."); | |
1290 | MODULE_LICENSE("GPL v2"); | |
1291 | MODULE_AUTHOR("Dmitry Kasatkin"); | |
1292 |