Commit | Line | Data |
---|---|---|
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> | |
0529900a | 39 | #include <crypto/algapi.h> |
537559a5 | 40 | |
ebedbf79 MG |
41 | #define DST_MAXBURST 4 |
42 | #define DMA_MIN (DST_MAXBURST * sizeof(u32)) | |
537559a5 | 43 | |
1bf95cca JF |
44 | #define _calc_walked(inout) (dd->inout##_walk.offset - dd->inout##_sg->offset) |
45 | ||
537559a5 DK |
46 | /* OMAP TRM gives bitfields as start:end, where start is the higher bit |
47 | number. For example 7:0 */ | |
48 | #define FLD_MASK(start, end) (((1 << ((start) - (end) + 1)) - 1) << (end)) | |
49 | #define FLD_VAL(val, start, end) (((val) << (end)) & FLD_MASK(start, end)) | |
50 | ||
0d35583a MG |
51 | #define AES_REG_KEY(dd, x) ((dd)->pdata->key_ofs - \ |
52 | ((x ^ 0x01) * 0x04)) | |
53 | #define AES_REG_IV(dd, x) ((dd)->pdata->iv_ofs + ((x) * 0x04)) | |
537559a5 | 54 | |
0d35583a | 55 | #define AES_REG_CTRL(dd) ((dd)->pdata->ctrl_ofs) |
340d9d31 VL |
56 | #define AES_REG_CTRL_CTR_WIDTH_MASK GENMASK(8, 7) |
57 | #define AES_REG_CTRL_CTR_WIDTH_32 0 | |
58 | #define AES_REG_CTRL_CTR_WIDTH_64 BIT(7) | |
59 | #define AES_REG_CTRL_CTR_WIDTH_96 BIT(8) | |
60 | #define AES_REG_CTRL_CTR_WIDTH_128 GENMASK(8, 7) | |
61 | #define AES_REG_CTRL_CTR BIT(6) | |
62 | #define AES_REG_CTRL_CBC BIT(5) | |
63 | #define AES_REG_CTRL_KEY_SIZE GENMASK(4, 3) | |
64 | #define AES_REG_CTRL_DIRECTION BIT(2) | |
65 | #define AES_REG_CTRL_INPUT_READY BIT(1) | |
66 | #define AES_REG_CTRL_OUTPUT_READY BIT(0) | |
5396c6c0 | 67 | #define AES_REG_CTRL_MASK GENMASK(24, 2) |
537559a5 | 68 | |
0d35583a | 69 | #define AES_REG_DATA_N(dd, x) ((dd)->pdata->data_ofs + ((x) * 0x04)) |
537559a5 | 70 | |
0d35583a | 71 | #define AES_REG_REV(dd) ((dd)->pdata->rev_ofs) |
537559a5 | 72 | |
0d35583a | 73 | #define AES_REG_MASK(dd) ((dd)->pdata->mask_ofs) |
340d9d31 VL |
74 | #define AES_REG_MASK_SIDLE BIT(6) |
75 | #define AES_REG_MASK_START BIT(5) | |
76 | #define AES_REG_MASK_DMA_OUT_EN BIT(3) | |
77 | #define AES_REG_MASK_DMA_IN_EN BIT(2) | |
78 | #define AES_REG_MASK_SOFTRESET BIT(1) | |
79 | #define AES_REG_AUTOIDLE BIT(0) | |
537559a5 | 80 | |
0d35583a | 81 | #define AES_REG_LENGTH_N(x) (0x54 + ((x) * 0x04)) |
537559a5 | 82 | |
67216756 JF |
83 | #define AES_REG_IRQ_STATUS(dd) ((dd)->pdata->irq_status_ofs) |
84 | #define AES_REG_IRQ_ENABLE(dd) ((dd)->pdata->irq_enable_ofs) | |
85 | #define AES_REG_IRQ_DATA_IN BIT(1) | |
86 | #define AES_REG_IRQ_DATA_OUT BIT(2) | |
537559a5 DK |
87 | #define DEFAULT_TIMEOUT (5*HZ) |
88 | ||
89 | #define FLAGS_MODE_MASK 0x000f | |
90 | #define FLAGS_ENCRYPT BIT(0) | |
91 | #define FLAGS_CBC BIT(1) | |
92 | #define FLAGS_GIV BIT(2) | |
f9fb69e7 | 93 | #define FLAGS_CTR BIT(3) |
537559a5 | 94 | |
67a730ce DK |
95 | #define FLAGS_INIT BIT(4) |
96 | #define FLAGS_FAST BIT(5) | |
97 | #define FLAGS_BUSY BIT(6) | |
537559a5 | 98 | |
1bf95cca JF |
99 | #define AES_BLOCK_WORDS (AES_BLOCK_SIZE >> 2) |
100 | ||
537559a5 DK |
101 | struct omap_aes_ctx { |
102 | struct omap_aes_dev *dd; | |
103 | ||
104 | int keylen; | |
105 | u32 key[AES_KEYSIZE_256 / sizeof(u32)]; | |
106 | unsigned long flags; | |
107 | }; | |
108 | ||
109 | struct omap_aes_reqctx { | |
110 | unsigned long mode; | |
111 | }; | |
112 | ||
113 | #define OMAP_AES_QUEUE_LENGTH 1 | |
114 | #define OMAP_AES_CACHE_SIZE 0 | |
115 | ||
f9fb69e7 MG |
116 | struct omap_aes_algs_info { |
117 | struct crypto_alg *algs_list; | |
118 | unsigned int size; | |
119 | unsigned int registered; | |
120 | }; | |
121 | ||
0d35583a | 122 | struct omap_aes_pdata { |
f9fb69e7 MG |
123 | struct omap_aes_algs_info *algs_info; |
124 | unsigned int algs_info_size; | |
125 | ||
0d35583a MG |
126 | void (*trigger)(struct omap_aes_dev *dd, int length); |
127 | ||
128 | u32 key_ofs; | |
129 | u32 iv_ofs; | |
130 | u32 ctrl_ofs; | |
131 | u32 data_ofs; | |
132 | u32 rev_ofs; | |
133 | u32 mask_ofs; | |
67216756 JF |
134 | u32 irq_enable_ofs; |
135 | u32 irq_status_ofs; | |
0d35583a MG |
136 | |
137 | u32 dma_enable_in; | |
138 | u32 dma_enable_out; | |
139 | u32 dma_start; | |
140 | ||
141 | u32 major_mask; | |
142 | u32 major_shift; | |
143 | u32 minor_mask; | |
144 | u32 minor_shift; | |
145 | }; | |
146 | ||
537559a5 DK |
147 | struct omap_aes_dev { |
148 | struct list_head list; | |
149 | unsigned long phys_base; | |
efce41b6 | 150 | void __iomem *io_base; |
537559a5 DK |
151 | struct omap_aes_ctx *ctx; |
152 | struct device *dev; | |
153 | unsigned long flags; | |
21fe9767 | 154 | int err; |
537559a5 | 155 | |
21fe9767 | 156 | struct tasklet_struct done_task; |
537559a5 DK |
157 | |
158 | struct ablkcipher_request *req; | |
0529900a | 159 | struct crypto_engine *engine; |
6242332f JF |
160 | |
161 | /* | |
162 | * total is used by PIO mode for book keeping so introduce | |
163 | * variable total_save as need it to calc page_order | |
164 | */ | |
537559a5 | 165 | size_t total; |
6242332f JF |
166 | size_t total_save; |
167 | ||
537559a5 | 168 | struct scatterlist *in_sg; |
537559a5 | 169 | struct scatterlist *out_sg; |
6242332f JF |
170 | |
171 | /* Buffers for copying for unaligned cases */ | |
172 | struct scatterlist in_sgl; | |
173 | struct scatterlist out_sgl; | |
174 | struct scatterlist *orig_out; | |
175 | int sgs_copied; | |
176 | ||
1bf95cca JF |
177 | struct scatter_walk in_walk; |
178 | struct scatter_walk out_walk; | |
537559a5 | 179 | int dma_in; |
ebedbf79 | 180 | struct dma_chan *dma_lch_in; |
537559a5 | 181 | int dma_out; |
ebedbf79 | 182 | struct dma_chan *dma_lch_out; |
e77c756e JF |
183 | int in_sg_len; |
184 | int out_sg_len; | |
98837abc | 185 | int pio_only; |
0d35583a | 186 | const struct omap_aes_pdata *pdata; |
537559a5 DK |
187 | }; |
188 | ||
189 | /* keep registered devices data here */ | |
190 | static LIST_HEAD(dev_list); | |
191 | static DEFINE_SPINLOCK(list_lock); | |
192 | ||
016af9b5 JF |
193 | #ifdef DEBUG |
194 | #define omap_aes_read(dd, offset) \ | |
195 | ({ \ | |
196 | int _read_ret; \ | |
197 | _read_ret = __raw_readl(dd->io_base + offset); \ | |
198 | pr_debug("omap_aes_read(" #offset "=%#x)= %#x\n", \ | |
199 | offset, _read_ret); \ | |
200 | _read_ret; \ | |
201 | }) | |
202 | #else | |
537559a5 DK |
203 | static inline u32 omap_aes_read(struct omap_aes_dev *dd, u32 offset) |
204 | { | |
205 | return __raw_readl(dd->io_base + offset); | |
206 | } | |
016af9b5 JF |
207 | #endif |
208 | ||
209 | #ifdef DEBUG | |
210 | #define omap_aes_write(dd, offset, value) \ | |
211 | do { \ | |
212 | pr_debug("omap_aes_write(" #offset "=%#x) value=%#x\n", \ | |
213 | offset, value); \ | |
214 | __raw_writel(value, dd->io_base + offset); \ | |
215 | } while (0) | |
216 | #else | |
537559a5 DK |
217 | static inline void omap_aes_write(struct omap_aes_dev *dd, u32 offset, |
218 | u32 value) | |
219 | { | |
220 | __raw_writel(value, dd->io_base + offset); | |
221 | } | |
016af9b5 | 222 | #endif |
537559a5 DK |
223 | |
224 | static inline void omap_aes_write_mask(struct omap_aes_dev *dd, u32 offset, | |
225 | u32 value, u32 mask) | |
226 | { | |
227 | u32 val; | |
228 | ||
229 | val = omap_aes_read(dd, offset); | |
230 | val &= ~mask; | |
231 | val |= value; | |
232 | omap_aes_write(dd, offset, val); | |
233 | } | |
234 | ||
235 | static void omap_aes_write_n(struct omap_aes_dev *dd, u32 offset, | |
236 | u32 *value, int count) | |
237 | { | |
238 | for (; count--; value++, offset += 4) | |
239 | omap_aes_write(dd, offset, *value); | |
240 | } | |
241 | ||
537559a5 DK |
242 | static int omap_aes_hw_init(struct omap_aes_dev *dd) |
243 | { | |
537559a5 | 244 | if (!(dd->flags & FLAGS_INIT)) { |
eeb2b202 | 245 | dd->flags |= FLAGS_INIT; |
21fe9767 | 246 | dd->err = 0; |
537559a5 DK |
247 | } |
248 | ||
eeb2b202 | 249 | return 0; |
537559a5 DK |
250 | } |
251 | ||
21fe9767 | 252 | static int omap_aes_write_ctrl(struct omap_aes_dev *dd) |
537559a5 DK |
253 | { |
254 | unsigned int key32; | |
67a730ce | 255 | int i, err; |
5396c6c0 | 256 | u32 val; |
537559a5 | 257 | |
21fe9767 DK |
258 | err = omap_aes_hw_init(dd); |
259 | if (err) | |
260 | return err; | |
261 | ||
537559a5 | 262 | key32 = dd->ctx->keylen / sizeof(u32); |
67a730ce DK |
263 | |
264 | /* it seems a key should always be set even if it has not changed */ | |
537559a5 | 265 | for (i = 0; i < key32; i++) { |
0d35583a | 266 | omap_aes_write(dd, AES_REG_KEY(dd, i), |
537559a5 DK |
267 | __le32_to_cpu(dd->ctx->key[i])); |
268 | } | |
537559a5 | 269 | |
f9fb69e7 | 270 | if ((dd->flags & (FLAGS_CBC | FLAGS_CTR)) && dd->req->info) |
0d35583a | 271 | omap_aes_write_n(dd, AES_REG_IV(dd, 0), dd->req->info, 4); |
67a730ce DK |
272 | |
273 | val = FLD_VAL(((dd->ctx->keylen >> 3) - 1), 4, 3); | |
274 | if (dd->flags & FLAGS_CBC) | |
275 | val |= AES_REG_CTRL_CBC; | |
5396c6c0 | 276 | if (dd->flags & FLAGS_CTR) |
8ed49c76 | 277 | val |= AES_REG_CTRL_CTR | AES_REG_CTRL_CTR_WIDTH_128; |
5396c6c0 | 278 | |
67a730ce DK |
279 | if (dd->flags & FLAGS_ENCRYPT) |
280 | val |= AES_REG_CTRL_DIRECTION; | |
537559a5 | 281 | |
5396c6c0 | 282 | omap_aes_write_mask(dd, AES_REG_CTRL(dd), val, AES_REG_CTRL_MASK); |
537559a5 | 283 | |
21fe9767 | 284 | return 0; |
537559a5 DK |
285 | } |
286 | ||
0d35583a MG |
287 | static void omap_aes_dma_trigger_omap2(struct omap_aes_dev *dd, int length) |
288 | { | |
289 | u32 mask, val; | |
290 | ||
291 | val = dd->pdata->dma_start; | |
292 | ||
293 | if (dd->dma_lch_out != NULL) | |
294 | val |= dd->pdata->dma_enable_out; | |
295 | if (dd->dma_lch_in != NULL) | |
296 | val |= dd->pdata->dma_enable_in; | |
297 | ||
298 | mask = dd->pdata->dma_enable_out | dd->pdata->dma_enable_in | | |
299 | dd->pdata->dma_start; | |
300 | ||
301 | omap_aes_write_mask(dd, AES_REG_MASK(dd), val, mask); | |
302 | ||
303 | } | |
304 | ||
305 | static void omap_aes_dma_trigger_omap4(struct omap_aes_dev *dd, int length) | |
306 | { | |
307 | omap_aes_write(dd, AES_REG_LENGTH_N(0), length); | |
308 | omap_aes_write(dd, AES_REG_LENGTH_N(1), 0); | |
309 | ||
310 | omap_aes_dma_trigger_omap2(dd, length); | |
311 | } | |
312 | ||
313 | static void omap_aes_dma_stop(struct omap_aes_dev *dd) | |
314 | { | |
315 | u32 mask; | |
316 | ||
317 | mask = dd->pdata->dma_enable_out | dd->pdata->dma_enable_in | | |
318 | dd->pdata->dma_start; | |
319 | ||
320 | omap_aes_write_mask(dd, AES_REG_MASK(dd), 0, mask); | |
321 | } | |
322 | ||
537559a5 DK |
323 | static struct omap_aes_dev *omap_aes_find_dev(struct omap_aes_ctx *ctx) |
324 | { | |
325 | struct omap_aes_dev *dd = NULL, *tmp; | |
326 | ||
327 | spin_lock_bh(&list_lock); | |
328 | if (!ctx->dd) { | |
329 | list_for_each_entry(tmp, &dev_list, list) { | |
330 | /* FIXME: take fist available aes core */ | |
331 | dd = tmp; | |
332 | break; | |
333 | } | |
334 | ctx->dd = dd; | |
335 | } else { | |
336 | /* already found before */ | |
337 | dd = ctx->dd; | |
338 | } | |
339 | spin_unlock_bh(&list_lock); | |
340 | ||
341 | return dd; | |
342 | } | |
343 | ||
ebedbf79 MG |
344 | static void omap_aes_dma_out_callback(void *data) |
345 | { | |
346 | struct omap_aes_dev *dd = data; | |
347 | ||
348 | /* dma_lch_out - completed */ | |
349 | tasklet_schedule(&dd->done_task); | |
350 | } | |
537559a5 DK |
351 | |
352 | static int omap_aes_dma_init(struct omap_aes_dev *dd) | |
353 | { | |
354 | int err = -ENOMEM; | |
ebedbf79 | 355 | dma_cap_mask_t mask; |
537559a5 | 356 | |
ebedbf79 MG |
357 | dd->dma_lch_out = NULL; |
358 | dd->dma_lch_in = NULL; | |
537559a5 | 359 | |
ebedbf79 MG |
360 | dma_cap_zero(mask); |
361 | dma_cap_set(DMA_SLAVE, mask); | |
362 | ||
b4b87a93 MG |
363 | dd->dma_lch_in = dma_request_slave_channel_compat(mask, |
364 | omap_dma_filter_fn, | |
365 | &dd->dma_in, | |
366 | dd->dev, "rx"); | |
ebedbf79 MG |
367 | if (!dd->dma_lch_in) { |
368 | dev_err(dd->dev, "Unable to request in DMA channel\n"); | |
369 | goto err_dma_in; | |
370 | } | |
371 | ||
b4b87a93 MG |
372 | dd->dma_lch_out = dma_request_slave_channel_compat(mask, |
373 | omap_dma_filter_fn, | |
374 | &dd->dma_out, | |
375 | dd->dev, "tx"); | |
ebedbf79 MG |
376 | if (!dd->dma_lch_out) { |
377 | dev_err(dd->dev, "Unable to request out DMA channel\n"); | |
378 | goto err_dma_out; | |
379 | } | |
537559a5 | 380 | |
537559a5 DK |
381 | return 0; |
382 | ||
383 | err_dma_out: | |
ebedbf79 | 384 | dma_release_channel(dd->dma_lch_in); |
537559a5 | 385 | err_dma_in: |
537559a5 DK |
386 | if (err) |
387 | pr_err("error: %d\n", err); | |
388 | return err; | |
389 | } | |
390 | ||
391 | static void omap_aes_dma_cleanup(struct omap_aes_dev *dd) | |
392 | { | |
ebedbf79 MG |
393 | dma_release_channel(dd->dma_lch_out); |
394 | dma_release_channel(dd->dma_lch_in); | |
537559a5 DK |
395 | } |
396 | ||
397 | static void sg_copy_buf(void *buf, struct scatterlist *sg, | |
398 | unsigned int start, unsigned int nbytes, int out) | |
399 | { | |
400 | struct scatter_walk walk; | |
401 | ||
402 | if (!nbytes) | |
403 | return; | |
404 | ||
405 | scatterwalk_start(&walk, sg); | |
406 | scatterwalk_advance(&walk, start); | |
407 | scatterwalk_copychunks(buf, &walk, nbytes, out); | |
408 | scatterwalk_done(&walk, out, 0); | |
409 | } | |
410 | ||
ebedbf79 | 411 | static int omap_aes_crypt_dma(struct crypto_tfm *tfm, |
4b645c94 JF |
412 | struct scatterlist *in_sg, struct scatterlist *out_sg, |
413 | int in_sg_len, int out_sg_len) | |
537559a5 DK |
414 | { |
415 | struct omap_aes_ctx *ctx = crypto_tfm_ctx(tfm); | |
416 | struct omap_aes_dev *dd = ctx->dd; | |
ebedbf79 MG |
417 | struct dma_async_tx_descriptor *tx_in, *tx_out; |
418 | struct dma_slave_config cfg; | |
4b645c94 | 419 | int ret; |
537559a5 | 420 | |
98837abc JF |
421 | if (dd->pio_only) { |
422 | scatterwalk_start(&dd->in_walk, dd->in_sg); | |
423 | scatterwalk_start(&dd->out_walk, dd->out_sg); | |
424 | ||
425 | /* Enable DATAIN interrupt and let it take | |
426 | care of the rest */ | |
427 | omap_aes_write(dd, AES_REG_IRQ_ENABLE(dd), 0x2); | |
428 | return 0; | |
429 | } | |
430 | ||
0a641712 JF |
431 | dma_sync_sg_for_device(dd->dev, dd->in_sg, in_sg_len, DMA_TO_DEVICE); |
432 | ||
ebedbf79 MG |
433 | memset(&cfg, 0, sizeof(cfg)); |
434 | ||
0d35583a MG |
435 | cfg.src_addr = dd->phys_base + AES_REG_DATA_N(dd, 0); |
436 | cfg.dst_addr = dd->phys_base + AES_REG_DATA_N(dd, 0); | |
ebedbf79 MG |
437 | cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; |
438 | cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; | |
439 | cfg.src_maxburst = DST_MAXBURST; | |
440 | cfg.dst_maxburst = DST_MAXBURST; | |
441 | ||
442 | /* IN */ | |
443 | ret = dmaengine_slave_config(dd->dma_lch_in, &cfg); | |
444 | if (ret) { | |
445 | dev_err(dd->dev, "can't configure IN dmaengine slave: %d\n", | |
446 | ret); | |
447 | return ret; | |
448 | } | |
449 | ||
4b645c94 | 450 | tx_in = dmaengine_prep_slave_sg(dd->dma_lch_in, in_sg, in_sg_len, |
ebedbf79 MG |
451 | DMA_MEM_TO_DEV, |
452 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); | |
453 | if (!tx_in) { | |
454 | dev_err(dd->dev, "IN prep_slave_sg() failed\n"); | |
455 | return -EINVAL; | |
456 | } | |
457 | ||
458 | /* No callback necessary */ | |
459 | tx_in->callback_param = dd; | |
460 | ||
461 | /* OUT */ | |
462 | ret = dmaengine_slave_config(dd->dma_lch_out, &cfg); | |
463 | if (ret) { | |
464 | dev_err(dd->dev, "can't configure OUT dmaengine slave: %d\n", | |
465 | ret); | |
466 | return ret; | |
467 | } | |
468 | ||
4b645c94 | 469 | tx_out = dmaengine_prep_slave_sg(dd->dma_lch_out, out_sg, out_sg_len, |
ebedbf79 MG |
470 | DMA_DEV_TO_MEM, |
471 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); | |
472 | if (!tx_out) { | |
473 | dev_err(dd->dev, "OUT prep_slave_sg() failed\n"); | |
474 | return -EINVAL; | |
475 | } | |
476 | ||
477 | tx_out->callback = omap_aes_dma_out_callback; | |
478 | tx_out->callback_param = dd; | |
479 | ||
480 | dmaengine_submit(tx_in); | |
481 | dmaengine_submit(tx_out); | |
482 | ||
483 | dma_async_issue_pending(dd->dma_lch_in); | |
484 | dma_async_issue_pending(dd->dma_lch_out); | |
537559a5 | 485 | |
0d35583a | 486 | /* start DMA */ |
4b645c94 | 487 | dd->pdata->trigger(dd, dd->total); |
83ea7e0f | 488 | |
537559a5 DK |
489 | return 0; |
490 | } | |
491 | ||
492 | static int omap_aes_crypt_dma_start(struct omap_aes_dev *dd) | |
493 | { | |
494 | struct crypto_tfm *tfm = crypto_ablkcipher_tfm( | |
495 | crypto_ablkcipher_reqtfm(dd->req)); | |
4b645c94 | 496 | int err; |
537559a5 DK |
497 | |
498 | pr_debug("total: %d\n", dd->total); | |
499 | ||
98837abc JF |
500 | if (!dd->pio_only) { |
501 | err = dma_map_sg(dd->dev, dd->in_sg, dd->in_sg_len, | |
502 | DMA_TO_DEVICE); | |
503 | if (!err) { | |
504 | dev_err(dd->dev, "dma_map_sg() error\n"); | |
505 | return -EINVAL; | |
506 | } | |
537559a5 | 507 | |
98837abc JF |
508 | err = dma_map_sg(dd->dev, dd->out_sg, dd->out_sg_len, |
509 | DMA_FROM_DEVICE); | |
510 | if (!err) { | |
511 | dev_err(dd->dev, "dma_map_sg() error\n"); | |
512 | return -EINVAL; | |
513 | } | |
537559a5 DK |
514 | } |
515 | ||
4b645c94 JF |
516 | err = omap_aes_crypt_dma(tfm, dd->in_sg, dd->out_sg, dd->in_sg_len, |
517 | dd->out_sg_len); | |
98837abc | 518 | if (err && !dd->pio_only) { |
4b645c94 JF |
519 | dma_unmap_sg(dd->dev, dd->in_sg, dd->in_sg_len, DMA_TO_DEVICE); |
520 | dma_unmap_sg(dd->dev, dd->out_sg, dd->out_sg_len, | |
521 | DMA_FROM_DEVICE); | |
21fe9767 | 522 | } |
537559a5 DK |
523 | |
524 | return err; | |
525 | } | |
526 | ||
527 | static void omap_aes_finish_req(struct omap_aes_dev *dd, int err) | |
528 | { | |
21fe9767 | 529 | struct ablkcipher_request *req = dd->req; |
537559a5 DK |
530 | |
531 | pr_debug("err: %d\n", err); | |
532 | ||
0529900a | 533 | crypto_finalize_request(dd->engine, req, err); |
537559a5 DK |
534 | } |
535 | ||
536 | static int omap_aes_crypt_dma_stop(struct omap_aes_dev *dd) | |
537 | { | |
537559a5 DK |
538 | pr_debug("total: %d\n", dd->total); |
539 | ||
0d35583a | 540 | omap_aes_dma_stop(dd); |
537559a5 | 541 | |
ebedbf79 MG |
542 | dmaengine_terminate_all(dd->dma_lch_in); |
543 | dmaengine_terminate_all(dd->dma_lch_out); | |
537559a5 | 544 | |
16f080aa | 545 | return 0; |
537559a5 DK |
546 | } |
547 | ||
6d7e7e02 | 548 | static int omap_aes_check_aligned(struct scatterlist *sg, int total) |
6242332f | 549 | { |
6d7e7e02 VL |
550 | int len = 0; |
551 | ||
310b0d55 VL |
552 | if (!IS_ALIGNED(total, AES_BLOCK_SIZE)) |
553 | return -EINVAL; | |
554 | ||
6242332f JF |
555 | while (sg) { |
556 | if (!IS_ALIGNED(sg->offset, 4)) | |
557 | return -1; | |
558 | if (!IS_ALIGNED(sg->length, AES_BLOCK_SIZE)) | |
559 | return -1; | |
6d7e7e02 VL |
560 | |
561 | len += sg->length; | |
6242332f JF |
562 | sg = sg_next(sg); |
563 | } | |
6d7e7e02 VL |
564 | |
565 | if (len != total) | |
566 | return -1; | |
567 | ||
6242332f JF |
568 | return 0; |
569 | } | |
570 | ||
034568e8 | 571 | static int omap_aes_copy_sgs(struct omap_aes_dev *dd) |
6242332f JF |
572 | { |
573 | void *buf_in, *buf_out; | |
310b0d55 | 574 | int pages, total; |
6242332f | 575 | |
310b0d55 VL |
576 | total = ALIGN(dd->total, AES_BLOCK_SIZE); |
577 | pages = get_order(total); | |
6242332f JF |
578 | |
579 | buf_in = (void *)__get_free_pages(GFP_ATOMIC, pages); | |
580 | buf_out = (void *)__get_free_pages(GFP_ATOMIC, pages); | |
581 | ||
582 | if (!buf_in || !buf_out) { | |
583 | pr_err("Couldn't allocated pages for unaligned cases.\n"); | |
584 | return -1; | |
585 | } | |
586 | ||
587 | dd->orig_out = dd->out_sg; | |
588 | ||
589 | sg_copy_buf(buf_in, dd->in_sg, 0, dd->total, 0); | |
590 | ||
591 | sg_init_table(&dd->in_sgl, 1); | |
310b0d55 | 592 | sg_set_buf(&dd->in_sgl, buf_in, total); |
6242332f JF |
593 | dd->in_sg = &dd->in_sgl; |
594 | ||
595 | sg_init_table(&dd->out_sgl, 1); | |
310b0d55 | 596 | sg_set_buf(&dd->out_sgl, buf_out, total); |
6242332f JF |
597 | dd->out_sg = &dd->out_sgl; |
598 | ||
599 | return 0; | |
600 | } | |
601 | ||
21fe9767 | 602 | static int omap_aes_handle_queue(struct omap_aes_dev *dd, |
0529900a | 603 | struct ablkcipher_request *req) |
537559a5 | 604 | { |
eeb2b202 | 605 | if (req) |
0529900a | 606 | return crypto_transfer_request_to_engine(dd->engine, req); |
537559a5 | 607 | |
0529900a BW |
608 | return 0; |
609 | } | |
537559a5 | 610 | |
0529900a BW |
611 | static int omap_aes_prepare_req(struct crypto_engine *engine, |
612 | struct ablkcipher_request *req) | |
613 | { | |
614 | struct omap_aes_ctx *ctx = crypto_ablkcipher_ctx( | |
615 | crypto_ablkcipher_reqtfm(req)); | |
616 | struct omap_aes_dev *dd = omap_aes_find_dev(ctx); | |
617 | struct omap_aes_reqctx *rctx; | |
618 | int len; | |
537559a5 | 619 | |
0529900a BW |
620 | if (!dd) |
621 | return -ENODEV; | |
537559a5 | 622 | |
537559a5 DK |
623 | /* assign new request to device */ |
624 | dd->req = req; | |
625 | dd->total = req->nbytes; | |
6242332f | 626 | dd->total_save = req->nbytes; |
537559a5 | 627 | dd->in_sg = req->src; |
537559a5 DK |
628 | dd->out_sg = req->dst; |
629 | ||
6d7e7e02 VL |
630 | if (omap_aes_check_aligned(dd->in_sg, dd->total) || |
631 | omap_aes_check_aligned(dd->out_sg, dd->total)) { | |
6242332f JF |
632 | if (omap_aes_copy_sgs(dd)) |
633 | pr_err("Failed to copy SGs for unaligned cases\n"); | |
634 | dd->sgs_copied = 1; | |
635 | } else { | |
636 | dd->sgs_copied = 0; | |
637 | } | |
638 | ||
310b0d55 VL |
639 | len = ALIGN(dd->total, AES_BLOCK_SIZE); |
640 | dd->in_sg_len = scatterwalk_bytes_sglen(dd->in_sg, len); | |
641 | dd->out_sg_len = scatterwalk_bytes_sglen(dd->out_sg, len); | |
e77c756e JF |
642 | BUG_ON(dd->in_sg_len < 0 || dd->out_sg_len < 0); |
643 | ||
537559a5 DK |
644 | rctx = ablkcipher_request_ctx(req); |
645 | ctx = crypto_ablkcipher_ctx(crypto_ablkcipher_reqtfm(req)); | |
646 | rctx->mode &= FLAGS_MODE_MASK; | |
647 | dd->flags = (dd->flags & ~FLAGS_MODE_MASK) | rctx->mode; | |
648 | ||
67a730ce | 649 | dd->ctx = ctx; |
537559a5 | 650 | ctx->dd = dd; |
537559a5 | 651 | |
0529900a BW |
652 | return omap_aes_write_ctrl(dd); |
653 | } | |
eeb2b202 | 654 | |
0529900a BW |
655 | static int omap_aes_crypt_req(struct crypto_engine *engine, |
656 | struct ablkcipher_request *req) | |
657 | { | |
658 | struct omap_aes_ctx *ctx = crypto_ablkcipher_ctx( | |
659 | crypto_ablkcipher_reqtfm(req)); | |
660 | struct omap_aes_dev *dd = omap_aes_find_dev(ctx); | |
661 | ||
662 | if (!dd) | |
663 | return -ENODEV; | |
664 | ||
665 | return omap_aes_crypt_dma_start(dd); | |
537559a5 DK |
666 | } |
667 | ||
21fe9767 | 668 | static void omap_aes_done_task(unsigned long data) |
537559a5 DK |
669 | { |
670 | struct omap_aes_dev *dd = (struct omap_aes_dev *)data; | |
6242332f | 671 | void *buf_in, *buf_out; |
310b0d55 | 672 | int pages, len; |
537559a5 | 673 | |
4b645c94 | 674 | pr_debug("enter done_task\n"); |
21fe9767 | 675 | |
98837abc JF |
676 | if (!dd->pio_only) { |
677 | dma_sync_sg_for_device(dd->dev, dd->out_sg, dd->out_sg_len, | |
678 | DMA_FROM_DEVICE); | |
6242332f JF |
679 | dma_unmap_sg(dd->dev, dd->in_sg, dd->in_sg_len, DMA_TO_DEVICE); |
680 | dma_unmap_sg(dd->dev, dd->out_sg, dd->out_sg_len, | |
681 | DMA_FROM_DEVICE); | |
98837abc JF |
682 | omap_aes_crypt_dma_stop(dd); |
683 | } | |
6242332f JF |
684 | |
685 | if (dd->sgs_copied) { | |
686 | buf_in = sg_virt(&dd->in_sgl); | |
687 | buf_out = sg_virt(&dd->out_sgl); | |
688 | ||
689 | sg_copy_buf(buf_out, dd->orig_out, 0, dd->total_save, 1); | |
690 | ||
310b0d55 VL |
691 | len = ALIGN(dd->total_save, AES_BLOCK_SIZE); |
692 | pages = get_order(len); | |
6242332f JF |
693 | free_pages((unsigned long)buf_in, pages); |
694 | free_pages((unsigned long)buf_out, pages); | |
695 | } | |
696 | ||
4b645c94 | 697 | omap_aes_finish_req(dd, 0); |
537559a5 DK |
698 | |
699 | pr_debug("exit\n"); | |
700 | } | |
701 | ||
702 | static int omap_aes_crypt(struct ablkcipher_request *req, unsigned long mode) | |
703 | { | |
704 | struct omap_aes_ctx *ctx = crypto_ablkcipher_ctx( | |
705 | crypto_ablkcipher_reqtfm(req)); | |
706 | struct omap_aes_reqctx *rctx = ablkcipher_request_ctx(req); | |
707 | struct omap_aes_dev *dd; | |
537559a5 DK |
708 | |
709 | pr_debug("nbytes: %d, enc: %d, cbc: %d\n", req->nbytes, | |
710 | !!(mode & FLAGS_ENCRYPT), | |
711 | !!(mode & FLAGS_CBC)); | |
712 | ||
713 | dd = omap_aes_find_dev(ctx); | |
714 | if (!dd) | |
715 | return -ENODEV; | |
716 | ||
717 | rctx->mode = mode; | |
718 | ||
21fe9767 | 719 | return omap_aes_handle_queue(dd, req); |
537559a5 DK |
720 | } |
721 | ||
722 | /* ********************** ALG API ************************************ */ | |
723 | ||
724 | static int omap_aes_setkey(struct crypto_ablkcipher *tfm, const u8 *key, | |
725 | unsigned int keylen) | |
726 | { | |
727 | struct omap_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm); | |
728 | ||
729 | if (keylen != AES_KEYSIZE_128 && keylen != AES_KEYSIZE_192 && | |
730 | keylen != AES_KEYSIZE_256) | |
731 | return -EINVAL; | |
732 | ||
733 | pr_debug("enter, keylen: %d\n", keylen); | |
734 | ||
735 | memcpy(ctx->key, key, keylen); | |
736 | ctx->keylen = keylen; | |
537559a5 DK |
737 | |
738 | return 0; | |
739 | } | |
740 | ||
741 | static int omap_aes_ecb_encrypt(struct ablkcipher_request *req) | |
742 | { | |
743 | return omap_aes_crypt(req, FLAGS_ENCRYPT); | |
744 | } | |
745 | ||
746 | static int omap_aes_ecb_decrypt(struct ablkcipher_request *req) | |
747 | { | |
748 | return omap_aes_crypt(req, 0); | |
749 | } | |
750 | ||
751 | static int omap_aes_cbc_encrypt(struct ablkcipher_request *req) | |
752 | { | |
753 | return omap_aes_crypt(req, FLAGS_ENCRYPT | FLAGS_CBC); | |
754 | } | |
755 | ||
756 | static int omap_aes_cbc_decrypt(struct ablkcipher_request *req) | |
757 | { | |
758 | return omap_aes_crypt(req, FLAGS_CBC); | |
759 | } | |
760 | ||
f9fb69e7 MG |
761 | static int omap_aes_ctr_encrypt(struct ablkcipher_request *req) |
762 | { | |
763 | return omap_aes_crypt(req, FLAGS_ENCRYPT | FLAGS_CTR); | |
764 | } | |
765 | ||
766 | static int omap_aes_ctr_decrypt(struct ablkcipher_request *req) | |
767 | { | |
768 | return omap_aes_crypt(req, FLAGS_CTR); | |
769 | } | |
770 | ||
537559a5 DK |
771 | static int omap_aes_cra_init(struct crypto_tfm *tfm) |
772 | { | |
a3485e68 | 773 | struct omap_aes_dev *dd = NULL; |
f7b2b5dd | 774 | int err; |
a3485e68 JF |
775 | |
776 | /* Find AES device, currently picks the first device */ | |
777 | spin_lock_bh(&list_lock); | |
778 | list_for_each_entry(dd, &dev_list, list) { | |
779 | break; | |
780 | } | |
781 | spin_unlock_bh(&list_lock); | |
537559a5 | 782 | |
f7b2b5dd NM |
783 | err = pm_runtime_get_sync(dd->dev); |
784 | if (err < 0) { | |
785 | dev_err(dd->dev, "%s: failed to get_sync(%d)\n", | |
786 | __func__, err); | |
787 | return err; | |
788 | } | |
789 | ||
537559a5 DK |
790 | tfm->crt_ablkcipher.reqsize = sizeof(struct omap_aes_reqctx); |
791 | ||
792 | return 0; | |
793 | } | |
794 | ||
795 | static void omap_aes_cra_exit(struct crypto_tfm *tfm) | |
796 | { | |
a3485e68 JF |
797 | struct omap_aes_dev *dd = NULL; |
798 | ||
799 | /* Find AES device, currently picks the first device */ | |
800 | spin_lock_bh(&list_lock); | |
801 | list_for_each_entry(dd, &dev_list, list) { | |
802 | break; | |
803 | } | |
804 | spin_unlock_bh(&list_lock); | |
805 | ||
806 | pm_runtime_put_sync(dd->dev); | |
537559a5 DK |
807 | } |
808 | ||
809 | /* ********************** ALGS ************************************ */ | |
810 | ||
f9fb69e7 | 811 | static struct crypto_alg algs_ecb_cbc[] = { |
537559a5 DK |
812 | { |
813 | .cra_name = "ecb(aes)", | |
814 | .cra_driver_name = "ecb-aes-omap", | |
6e2e3d1d | 815 | .cra_priority = 300, |
d912bb76 NM |
816 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | |
817 | CRYPTO_ALG_KERN_DRIVER_ONLY | | |
818 | CRYPTO_ALG_ASYNC, | |
537559a5 DK |
819 | .cra_blocksize = AES_BLOCK_SIZE, |
820 | .cra_ctxsize = sizeof(struct omap_aes_ctx), | |
efce41b6 | 821 | .cra_alignmask = 0, |
537559a5 DK |
822 | .cra_type = &crypto_ablkcipher_type, |
823 | .cra_module = THIS_MODULE, | |
824 | .cra_init = omap_aes_cra_init, | |
825 | .cra_exit = omap_aes_cra_exit, | |
826 | .cra_u.ablkcipher = { | |
827 | .min_keysize = AES_MIN_KEY_SIZE, | |
828 | .max_keysize = AES_MAX_KEY_SIZE, | |
829 | .setkey = omap_aes_setkey, | |
830 | .encrypt = omap_aes_ecb_encrypt, | |
831 | .decrypt = omap_aes_ecb_decrypt, | |
832 | } | |
833 | }, | |
834 | { | |
835 | .cra_name = "cbc(aes)", | |
836 | .cra_driver_name = "cbc-aes-omap", | |
6e2e3d1d | 837 | .cra_priority = 300, |
d912bb76 NM |
838 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | |
839 | CRYPTO_ALG_KERN_DRIVER_ONLY | | |
840 | CRYPTO_ALG_ASYNC, | |
537559a5 DK |
841 | .cra_blocksize = AES_BLOCK_SIZE, |
842 | .cra_ctxsize = sizeof(struct omap_aes_ctx), | |
efce41b6 | 843 | .cra_alignmask = 0, |
537559a5 DK |
844 | .cra_type = &crypto_ablkcipher_type, |
845 | .cra_module = THIS_MODULE, | |
846 | .cra_init = omap_aes_cra_init, | |
847 | .cra_exit = omap_aes_cra_exit, | |
848 | .cra_u.ablkcipher = { | |
849 | .min_keysize = AES_MIN_KEY_SIZE, | |
850 | .max_keysize = AES_MAX_KEY_SIZE, | |
851 | .ivsize = AES_BLOCK_SIZE, | |
852 | .setkey = omap_aes_setkey, | |
853 | .encrypt = omap_aes_cbc_encrypt, | |
854 | .decrypt = omap_aes_cbc_decrypt, | |
855 | } | |
856 | } | |
857 | }; | |
858 | ||
f9fb69e7 MG |
859 | static struct crypto_alg algs_ctr[] = { |
860 | { | |
861 | .cra_name = "ctr(aes)", | |
862 | .cra_driver_name = "ctr-aes-omap", | |
6e2e3d1d | 863 | .cra_priority = 300, |
f9fb69e7 MG |
864 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | |
865 | CRYPTO_ALG_KERN_DRIVER_ONLY | | |
866 | CRYPTO_ALG_ASYNC, | |
867 | .cra_blocksize = AES_BLOCK_SIZE, | |
868 | .cra_ctxsize = sizeof(struct omap_aes_ctx), | |
869 | .cra_alignmask = 0, | |
870 | .cra_type = &crypto_ablkcipher_type, | |
871 | .cra_module = THIS_MODULE, | |
872 | .cra_init = omap_aes_cra_init, | |
873 | .cra_exit = omap_aes_cra_exit, | |
874 | .cra_u.ablkcipher = { | |
875 | .min_keysize = AES_MIN_KEY_SIZE, | |
876 | .max_keysize = AES_MAX_KEY_SIZE, | |
877 | .geniv = "eseqiv", | |
878 | .ivsize = AES_BLOCK_SIZE, | |
879 | .setkey = omap_aes_setkey, | |
880 | .encrypt = omap_aes_ctr_encrypt, | |
881 | .decrypt = omap_aes_ctr_decrypt, | |
882 | } | |
883 | } , | |
884 | }; | |
885 | ||
886 | static struct omap_aes_algs_info omap_aes_algs_info_ecb_cbc[] = { | |
887 | { | |
888 | .algs_list = algs_ecb_cbc, | |
889 | .size = ARRAY_SIZE(algs_ecb_cbc), | |
890 | }, | |
891 | }; | |
892 | ||
0d35583a | 893 | static const struct omap_aes_pdata omap_aes_pdata_omap2 = { |
f9fb69e7 MG |
894 | .algs_info = omap_aes_algs_info_ecb_cbc, |
895 | .algs_info_size = ARRAY_SIZE(omap_aes_algs_info_ecb_cbc), | |
0d35583a MG |
896 | .trigger = omap_aes_dma_trigger_omap2, |
897 | .key_ofs = 0x1c, | |
898 | .iv_ofs = 0x20, | |
899 | .ctrl_ofs = 0x30, | |
900 | .data_ofs = 0x34, | |
901 | .rev_ofs = 0x44, | |
902 | .mask_ofs = 0x48, | |
903 | .dma_enable_in = BIT(2), | |
904 | .dma_enable_out = BIT(3), | |
905 | .dma_start = BIT(5), | |
906 | .major_mask = 0xf0, | |
907 | .major_shift = 4, | |
908 | .minor_mask = 0x0f, | |
909 | .minor_shift = 0, | |
910 | }; | |
911 | ||
bc69d124 | 912 | #ifdef CONFIG_OF |
f9fb69e7 MG |
913 | static struct omap_aes_algs_info omap_aes_algs_info_ecb_cbc_ctr[] = { |
914 | { | |
915 | .algs_list = algs_ecb_cbc, | |
916 | .size = ARRAY_SIZE(algs_ecb_cbc), | |
917 | }, | |
918 | { | |
919 | .algs_list = algs_ctr, | |
920 | .size = ARRAY_SIZE(algs_ctr), | |
921 | }, | |
922 | }; | |
923 | ||
924 | static const struct omap_aes_pdata omap_aes_pdata_omap3 = { | |
925 | .algs_info = omap_aes_algs_info_ecb_cbc_ctr, | |
926 | .algs_info_size = ARRAY_SIZE(omap_aes_algs_info_ecb_cbc_ctr), | |
927 | .trigger = omap_aes_dma_trigger_omap2, | |
928 | .key_ofs = 0x1c, | |
929 | .iv_ofs = 0x20, | |
930 | .ctrl_ofs = 0x30, | |
931 | .data_ofs = 0x34, | |
932 | .rev_ofs = 0x44, | |
933 | .mask_ofs = 0x48, | |
934 | .dma_enable_in = BIT(2), | |
935 | .dma_enable_out = BIT(3), | |
936 | .dma_start = BIT(5), | |
937 | .major_mask = 0xf0, | |
938 | .major_shift = 4, | |
939 | .minor_mask = 0x0f, | |
940 | .minor_shift = 0, | |
941 | }; | |
942 | ||
0d35583a | 943 | static const struct omap_aes_pdata omap_aes_pdata_omap4 = { |
f9fb69e7 MG |
944 | .algs_info = omap_aes_algs_info_ecb_cbc_ctr, |
945 | .algs_info_size = ARRAY_SIZE(omap_aes_algs_info_ecb_cbc_ctr), | |
0d35583a MG |
946 | .trigger = omap_aes_dma_trigger_omap4, |
947 | .key_ofs = 0x3c, | |
948 | .iv_ofs = 0x40, | |
949 | .ctrl_ofs = 0x50, | |
950 | .data_ofs = 0x60, | |
951 | .rev_ofs = 0x80, | |
952 | .mask_ofs = 0x84, | |
67216756 JF |
953 | .irq_status_ofs = 0x8c, |
954 | .irq_enable_ofs = 0x90, | |
0d35583a MG |
955 | .dma_enable_in = BIT(5), |
956 | .dma_enable_out = BIT(6), | |
957 | .major_mask = 0x0700, | |
958 | .major_shift = 8, | |
959 | .minor_mask = 0x003f, | |
960 | .minor_shift = 0, | |
961 | }; | |
962 | ||
1bf95cca JF |
963 | static irqreturn_t omap_aes_irq(int irq, void *dev_id) |
964 | { | |
965 | struct omap_aes_dev *dd = dev_id; | |
966 | u32 status, i; | |
967 | u32 *src, *dst; | |
968 | ||
969 | status = omap_aes_read(dd, AES_REG_IRQ_STATUS(dd)); | |
970 | if (status & AES_REG_IRQ_DATA_IN) { | |
971 | omap_aes_write(dd, AES_REG_IRQ_ENABLE(dd), 0x0); | |
972 | ||
973 | BUG_ON(!dd->in_sg); | |
974 | ||
975 | BUG_ON(_calc_walked(in) > dd->in_sg->length); | |
976 | ||
977 | src = sg_virt(dd->in_sg) + _calc_walked(in); | |
978 | ||
979 | for (i = 0; i < AES_BLOCK_WORDS; i++) { | |
980 | omap_aes_write(dd, AES_REG_DATA_N(dd, i), *src); | |
981 | ||
982 | scatterwalk_advance(&dd->in_walk, 4); | |
983 | if (dd->in_sg->length == _calc_walked(in)) { | |
5be4d4c9 | 984 | dd->in_sg = sg_next(dd->in_sg); |
1bf95cca JF |
985 | if (dd->in_sg) { |
986 | scatterwalk_start(&dd->in_walk, | |
987 | dd->in_sg); | |
988 | src = sg_virt(dd->in_sg) + | |
989 | _calc_walked(in); | |
990 | } | |
991 | } else { | |
992 | src++; | |
993 | } | |
994 | } | |
995 | ||
996 | /* Clear IRQ status */ | |
997 | status &= ~AES_REG_IRQ_DATA_IN; | |
998 | omap_aes_write(dd, AES_REG_IRQ_STATUS(dd), status); | |
999 | ||
1000 | /* Enable DATA_OUT interrupt */ | |
1001 | omap_aes_write(dd, AES_REG_IRQ_ENABLE(dd), 0x4); | |
1002 | ||
1003 | } else if (status & AES_REG_IRQ_DATA_OUT) { | |
1004 | omap_aes_write(dd, AES_REG_IRQ_ENABLE(dd), 0x0); | |
1005 | ||
1006 | BUG_ON(!dd->out_sg); | |
1007 | ||
1008 | BUG_ON(_calc_walked(out) > dd->out_sg->length); | |
1009 | ||
1010 | dst = sg_virt(dd->out_sg) + _calc_walked(out); | |
1011 | ||
1012 | for (i = 0; i < AES_BLOCK_WORDS; i++) { | |
1013 | *dst = omap_aes_read(dd, AES_REG_DATA_N(dd, i)); | |
1014 | scatterwalk_advance(&dd->out_walk, 4); | |
1015 | if (dd->out_sg->length == _calc_walked(out)) { | |
5be4d4c9 | 1016 | dd->out_sg = sg_next(dd->out_sg); |
1bf95cca JF |
1017 | if (dd->out_sg) { |
1018 | scatterwalk_start(&dd->out_walk, | |
1019 | dd->out_sg); | |
1020 | dst = sg_virt(dd->out_sg) + | |
1021 | _calc_walked(out); | |
1022 | } | |
1023 | } else { | |
1024 | dst++; | |
1025 | } | |
1026 | } | |
1027 | ||
310b0d55 | 1028 | dd->total -= min_t(size_t, AES_BLOCK_SIZE, dd->total); |
1bf95cca JF |
1029 | |
1030 | /* Clear IRQ status */ | |
1031 | status &= ~AES_REG_IRQ_DATA_OUT; | |
1032 | omap_aes_write(dd, AES_REG_IRQ_STATUS(dd), status); | |
1033 | ||
1034 | if (!dd->total) | |
1035 | /* All bytes read! */ | |
1036 | tasklet_schedule(&dd->done_task); | |
1037 | else | |
1038 | /* Enable DATA_IN interrupt for next block */ | |
1039 | omap_aes_write(dd, AES_REG_IRQ_ENABLE(dd), 0x2); | |
1040 | } | |
1041 | ||
1042 | return IRQ_HANDLED; | |
1043 | } | |
1044 | ||
bc69d124 MG |
1045 | static const struct of_device_id omap_aes_of_match[] = { |
1046 | { | |
1047 | .compatible = "ti,omap2-aes", | |
0d35583a MG |
1048 | .data = &omap_aes_pdata_omap2, |
1049 | }, | |
f9fb69e7 MG |
1050 | { |
1051 | .compatible = "ti,omap3-aes", | |
1052 | .data = &omap_aes_pdata_omap3, | |
1053 | }, | |
0d35583a MG |
1054 | { |
1055 | .compatible = "ti,omap4-aes", | |
1056 | .data = &omap_aes_pdata_omap4, | |
bc69d124 MG |
1057 | }, |
1058 | {}, | |
1059 | }; | |
1060 | MODULE_DEVICE_TABLE(of, omap_aes_of_match); | |
1061 | ||
1062 | static int omap_aes_get_res_of(struct omap_aes_dev *dd, | |
1063 | struct device *dev, struct resource *res) | |
1064 | { | |
1065 | struct device_node *node = dev->of_node; | |
1066 | const struct of_device_id *match; | |
1067 | int err = 0; | |
1068 | ||
1069 | match = of_match_device(of_match_ptr(omap_aes_of_match), dev); | |
1070 | if (!match) { | |
1071 | dev_err(dev, "no compatible OF match\n"); | |
1072 | err = -EINVAL; | |
1073 | goto err; | |
1074 | } | |
1075 | ||
1076 | err = of_address_to_resource(node, 0, res); | |
1077 | if (err < 0) { | |
1078 | dev_err(dev, "can't translate OF node address\n"); | |
1079 | err = -EINVAL; | |
1080 | goto err; | |
1081 | } | |
1082 | ||
1083 | dd->dma_out = -1; /* Dummy value that's unused */ | |
1084 | dd->dma_in = -1; /* Dummy value that's unused */ | |
1085 | ||
0d35583a MG |
1086 | dd->pdata = match->data; |
1087 | ||
bc69d124 MG |
1088 | err: |
1089 | return err; | |
1090 | } | |
1091 | #else | |
1092 | static const struct of_device_id omap_aes_of_match[] = { | |
1093 | {}, | |
1094 | }; | |
1095 | ||
1096 | static int omap_aes_get_res_of(struct omap_aes_dev *dd, | |
1097 | struct device *dev, struct resource *res) | |
1098 | { | |
1099 | return -EINVAL; | |
1100 | } | |
1101 | #endif | |
1102 | ||
1103 | static int omap_aes_get_res_pdev(struct omap_aes_dev *dd, | |
1104 | struct platform_device *pdev, struct resource *res) | |
1105 | { | |
1106 | struct device *dev = &pdev->dev; | |
1107 | struct resource *r; | |
1108 | int err = 0; | |
1109 | ||
1110 | /* Get the base address */ | |
1111 | r = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1112 | if (!r) { | |
1113 | dev_err(dev, "no MEM resource info\n"); | |
1114 | err = -ENODEV; | |
1115 | goto err; | |
1116 | } | |
1117 | memcpy(res, r, sizeof(*res)); | |
1118 | ||
1119 | /* Get the DMA out channel */ | |
1120 | r = platform_get_resource(pdev, IORESOURCE_DMA, 0); | |
1121 | if (!r) { | |
1122 | dev_err(dev, "no DMA out resource info\n"); | |
1123 | err = -ENODEV; | |
1124 | goto err; | |
1125 | } | |
1126 | dd->dma_out = r->start; | |
1127 | ||
1128 | /* Get the DMA in channel */ | |
1129 | r = platform_get_resource(pdev, IORESOURCE_DMA, 1); | |
1130 | if (!r) { | |
1131 | dev_err(dev, "no DMA in resource info\n"); | |
1132 | err = -ENODEV; | |
1133 | goto err; | |
1134 | } | |
1135 | dd->dma_in = r->start; | |
1136 | ||
0d35583a MG |
1137 | /* Only OMAP2/3 can be non-DT */ |
1138 | dd->pdata = &omap_aes_pdata_omap2; | |
1139 | ||
bc69d124 MG |
1140 | err: |
1141 | return err; | |
1142 | } | |
1143 | ||
537559a5 DK |
1144 | static int omap_aes_probe(struct platform_device *pdev) |
1145 | { | |
1146 | struct device *dev = &pdev->dev; | |
1147 | struct omap_aes_dev *dd; | |
f9fb69e7 | 1148 | struct crypto_alg *algp; |
bc69d124 | 1149 | struct resource res; |
1801ad94 | 1150 | int err = -ENOMEM, i, j, irq = -1; |
537559a5 DK |
1151 | u32 reg; |
1152 | ||
05007c10 | 1153 | dd = devm_kzalloc(dev, sizeof(struct omap_aes_dev), GFP_KERNEL); |
537559a5 DK |
1154 | if (dd == NULL) { |
1155 | dev_err(dev, "unable to alloc data struct.\n"); | |
1156 | goto err_data; | |
1157 | } | |
1158 | dd->dev = dev; | |
1159 | platform_set_drvdata(pdev, dd); | |
1160 | ||
bc69d124 MG |
1161 | err = (dev->of_node) ? omap_aes_get_res_of(dd, dev, &res) : |
1162 | omap_aes_get_res_pdev(dd, pdev, &res); | |
1163 | if (err) | |
537559a5 | 1164 | goto err_res; |
bc69d124 | 1165 | |
30862281 LN |
1166 | dd->io_base = devm_ioremap_resource(dev, &res); |
1167 | if (IS_ERR(dd->io_base)) { | |
1168 | err = PTR_ERR(dd->io_base); | |
5946c4a5 | 1169 | goto err_res; |
537559a5 | 1170 | } |
bc69d124 | 1171 | dd->phys_base = res.start; |
537559a5 | 1172 | |
5946c4a5 | 1173 | pm_runtime_enable(dev); |
f7b2b5dd NM |
1174 | err = pm_runtime_get_sync(dev); |
1175 | if (err < 0) { | |
1176 | dev_err(dev, "%s: failed to get_sync(%d)\n", | |
1177 | __func__, err); | |
1178 | goto err_res; | |
1179 | } | |
5946c4a5 | 1180 | |
0d35583a MG |
1181 | omap_aes_dma_stop(dd); |
1182 | ||
1183 | reg = omap_aes_read(dd, AES_REG_REV(dd)); | |
5946c4a5 MG |
1184 | |
1185 | pm_runtime_put_sync(dev); | |
537559a5 | 1186 | |
0d35583a MG |
1187 | dev_info(dev, "OMAP AES hw accel rev: %u.%u\n", |
1188 | (reg & dd->pdata->major_mask) >> dd->pdata->major_shift, | |
1189 | (reg & dd->pdata->minor_mask) >> dd->pdata->minor_shift); | |
1190 | ||
21fe9767 | 1191 | tasklet_init(&dd->done_task, omap_aes_done_task, (unsigned long)dd); |
537559a5 DK |
1192 | |
1193 | err = omap_aes_dma_init(dd); | |
1801ad94 JF |
1194 | if (err && AES_REG_IRQ_STATUS(dd) && AES_REG_IRQ_ENABLE(dd)) { |
1195 | dd->pio_only = 1; | |
1196 | ||
1197 | irq = platform_get_irq(pdev, 0); | |
1198 | if (irq < 0) { | |
1199 | dev_err(dev, "can't get IRQ resource\n"); | |
1200 | goto err_irq; | |
1201 | } | |
1202 | ||
bce2a228 | 1203 | err = devm_request_irq(dev, irq, omap_aes_irq, 0, |
1801ad94 JF |
1204 | dev_name(dev), dd); |
1205 | if (err) { | |
1206 | dev_err(dev, "Unable to grab omap-aes IRQ\n"); | |
1207 | goto err_irq; | |
1208 | } | |
1209 | } | |
1210 | ||
537559a5 DK |
1211 | |
1212 | INIT_LIST_HEAD(&dd->list); | |
1213 | spin_lock(&list_lock); | |
1214 | list_add_tail(&dd->list, &dev_list); | |
1215 | spin_unlock(&list_lock); | |
1216 | ||
f9fb69e7 MG |
1217 | for (i = 0; i < dd->pdata->algs_info_size; i++) { |
1218 | for (j = 0; j < dd->pdata->algs_info[i].size; j++) { | |
1219 | algp = &dd->pdata->algs_info[i].algs_list[j]; | |
1220 | ||
1221 | pr_debug("reg alg: %s\n", algp->cra_name); | |
1222 | INIT_LIST_HEAD(&algp->cra_list); | |
1223 | ||
1224 | err = crypto_register_alg(algp); | |
1225 | if (err) | |
1226 | goto err_algs; | |
1227 | ||
1228 | dd->pdata->algs_info[i].registered++; | |
1229 | } | |
537559a5 DK |
1230 | } |
1231 | ||
0529900a BW |
1232 | /* Initialize crypto engine */ |
1233 | dd->engine = crypto_engine_alloc_init(dev, 1); | |
1234 | if (!dd->engine) | |
1235 | goto err_algs; | |
1236 | ||
1237 | dd->engine->prepare_request = omap_aes_prepare_req; | |
1238 | dd->engine->crypt_one_request = omap_aes_crypt_req; | |
1239 | err = crypto_engine_start(dd->engine); | |
1240 | if (err) | |
1241 | goto err_engine; | |
1242 | ||
537559a5 | 1243 | return 0; |
0529900a BW |
1244 | err_engine: |
1245 | crypto_engine_exit(dd->engine); | |
537559a5 | 1246 | err_algs: |
f9fb69e7 MG |
1247 | for (i = dd->pdata->algs_info_size - 1; i >= 0; i--) |
1248 | for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--) | |
1249 | crypto_unregister_alg( | |
1250 | &dd->pdata->algs_info[i].algs_list[j]); | |
bce2a228 | 1251 | if (!dd->pio_only) |
1801ad94 JF |
1252 | omap_aes_dma_cleanup(dd); |
1253 | err_irq: | |
21fe9767 | 1254 | tasklet_kill(&dd->done_task); |
5946c4a5 | 1255 | pm_runtime_disable(dev); |
537559a5 | 1256 | err_res: |
537559a5 DK |
1257 | dd = NULL; |
1258 | err_data: | |
1259 | dev_err(dev, "initialization failed.\n"); | |
1260 | return err; | |
1261 | } | |
1262 | ||
1263 | static int omap_aes_remove(struct platform_device *pdev) | |
1264 | { | |
1265 | struct omap_aes_dev *dd = platform_get_drvdata(pdev); | |
f9fb69e7 | 1266 | int i, j; |
537559a5 DK |
1267 | |
1268 | if (!dd) | |
1269 | return -ENODEV; | |
1270 | ||
1271 | spin_lock(&list_lock); | |
1272 | list_del(&dd->list); | |
1273 | spin_unlock(&list_lock); | |
1274 | ||
f9fb69e7 MG |
1275 | for (i = dd->pdata->algs_info_size - 1; i >= 0; i--) |
1276 | for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--) | |
1277 | crypto_unregister_alg( | |
1278 | &dd->pdata->algs_info[i].algs_list[j]); | |
537559a5 | 1279 | |
0529900a | 1280 | crypto_engine_exit(dd->engine); |
21fe9767 | 1281 | tasklet_kill(&dd->done_task); |
537559a5 | 1282 | omap_aes_dma_cleanup(dd); |
5946c4a5 | 1283 | pm_runtime_disable(dd->dev); |
537559a5 DK |
1284 | dd = NULL; |
1285 | ||
1286 | return 0; | |
1287 | } | |
1288 | ||
0635fb3a MG |
1289 | #ifdef CONFIG_PM_SLEEP |
1290 | static int omap_aes_suspend(struct device *dev) | |
1291 | { | |
1292 | pm_runtime_put_sync(dev); | |
1293 | return 0; | |
1294 | } | |
1295 | ||
1296 | static int omap_aes_resume(struct device *dev) | |
1297 | { | |
1298 | pm_runtime_get_sync(dev); | |
1299 | return 0; | |
1300 | } | |
1301 | #endif | |
1302 | ||
ea7b2843 | 1303 | static SIMPLE_DEV_PM_OPS(omap_aes_pm_ops, omap_aes_suspend, omap_aes_resume); |
0635fb3a | 1304 | |
537559a5 DK |
1305 | static struct platform_driver omap_aes_driver = { |
1306 | .probe = omap_aes_probe, | |
1307 | .remove = omap_aes_remove, | |
1308 | .driver = { | |
1309 | .name = "omap-aes", | |
0635fb3a | 1310 | .pm = &omap_aes_pm_ops, |
bc69d124 | 1311 | .of_match_table = omap_aes_of_match, |
537559a5 DK |
1312 | }, |
1313 | }; | |
1314 | ||
94e51df9 | 1315 | module_platform_driver(omap_aes_driver); |
537559a5 DK |
1316 | |
1317 | MODULE_DESCRIPTION("OMAP AES hw acceleration support."); | |
1318 | MODULE_LICENSE("GPL v2"); | |
1319 | MODULE_AUTHOR("Dmitry Kasatkin"); | |
1320 |