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> | |
39 | ||
ebedbf79 MG |
40 | #define DST_MAXBURST 4 |
41 | #define DMA_MIN (DST_MAXBURST * sizeof(u32)) | |
537559a5 | 42 | |
1bf95cca JF |
43 | #define _calc_walked(inout) (dd->inout##_walk.offset - dd->inout##_sg->offset) |
44 | ||
537559a5 DK |
45 | /* OMAP TRM gives bitfields as start:end, where start is the higher bit |
46 | number. For example 7:0 */ | |
47 | #define FLD_MASK(start, end) (((1 << ((start) - (end) + 1)) - 1) << (end)) | |
48 | #define FLD_VAL(val, start, end) (((val) << (end)) & FLD_MASK(start, end)) | |
49 | ||
0d35583a MG |
50 | #define AES_REG_KEY(dd, x) ((dd)->pdata->key_ofs - \ |
51 | ((x ^ 0x01) * 0x04)) | |
52 | #define AES_REG_IV(dd, x) ((dd)->pdata->iv_ofs + ((x) * 0x04)) | |
537559a5 | 53 | |
0d35583a | 54 | #define AES_REG_CTRL(dd) ((dd)->pdata->ctrl_ofs) |
f9fb69e7 MG |
55 | #define AES_REG_CTRL_CTR_WIDTH_MASK (3 << 7) |
56 | #define AES_REG_CTRL_CTR_WIDTH_32 (0 << 7) | |
57 | #define AES_REG_CTRL_CTR_WIDTH_64 (1 << 7) | |
58 | #define AES_REG_CTRL_CTR_WIDTH_96 (2 << 7) | |
59 | #define AES_REG_CTRL_CTR_WIDTH_128 (3 << 7) | |
537559a5 DK |
60 | #define AES_REG_CTRL_CTR (1 << 6) |
61 | #define AES_REG_CTRL_CBC (1 << 5) | |
62 | #define AES_REG_CTRL_KEY_SIZE (3 << 3) | |
63 | #define AES_REG_CTRL_DIRECTION (1 << 2) | |
64 | #define AES_REG_CTRL_INPUT_READY (1 << 1) | |
65 | #define AES_REG_CTRL_OUTPUT_READY (1 << 0) | |
66 | ||
0d35583a | 67 | #define AES_REG_DATA_N(dd, x) ((dd)->pdata->data_ofs + ((x) * 0x04)) |
537559a5 | 68 | |
0d35583a | 69 | #define AES_REG_REV(dd) ((dd)->pdata->rev_ofs) |
537559a5 | 70 | |
0d35583a | 71 | #define AES_REG_MASK(dd) ((dd)->pdata->mask_ofs) |
537559a5 DK |
72 | #define AES_REG_MASK_SIDLE (1 << 6) |
73 | #define AES_REG_MASK_START (1 << 5) | |
74 | #define AES_REG_MASK_DMA_OUT_EN (1 << 3) | |
75 | #define AES_REG_MASK_DMA_IN_EN (1 << 2) | |
76 | #define AES_REG_MASK_SOFTRESET (1 << 1) | |
77 | #define AES_REG_AUTOIDLE (1 << 0) | |
78 | ||
0d35583a | 79 | #define AES_REG_LENGTH_N(x) (0x54 + ((x) * 0x04)) |
537559a5 | 80 | |
67216756 JF |
81 | #define AES_REG_IRQ_STATUS(dd) ((dd)->pdata->irq_status_ofs) |
82 | #define AES_REG_IRQ_ENABLE(dd) ((dd)->pdata->irq_enable_ofs) | |
83 | #define AES_REG_IRQ_DATA_IN BIT(1) | |
84 | #define AES_REG_IRQ_DATA_OUT BIT(2) | |
537559a5 DK |
85 | #define DEFAULT_TIMEOUT (5*HZ) |
86 | ||
87 | #define FLAGS_MODE_MASK 0x000f | |
88 | #define FLAGS_ENCRYPT BIT(0) | |
89 | #define FLAGS_CBC BIT(1) | |
90 | #define FLAGS_GIV BIT(2) | |
f9fb69e7 | 91 | #define FLAGS_CTR BIT(3) |
537559a5 | 92 | |
67a730ce DK |
93 | #define FLAGS_INIT BIT(4) |
94 | #define FLAGS_FAST BIT(5) | |
95 | #define FLAGS_BUSY BIT(6) | |
537559a5 | 96 | |
1bf95cca JF |
97 | #define AES_BLOCK_WORDS (AES_BLOCK_SIZE >> 2) |
98 | ||
537559a5 DK |
99 | struct omap_aes_ctx { |
100 | struct omap_aes_dev *dd; | |
101 | ||
102 | int keylen; | |
103 | u32 key[AES_KEYSIZE_256 / sizeof(u32)]; | |
104 | unsigned long flags; | |
105 | }; | |
106 | ||
107 | struct omap_aes_reqctx { | |
108 | unsigned long mode; | |
109 | }; | |
110 | ||
111 | #define OMAP_AES_QUEUE_LENGTH 1 | |
112 | #define OMAP_AES_CACHE_SIZE 0 | |
113 | ||
f9fb69e7 MG |
114 | struct omap_aes_algs_info { |
115 | struct crypto_alg *algs_list; | |
116 | unsigned int size; | |
117 | unsigned int registered; | |
118 | }; | |
119 | ||
0d35583a | 120 | struct omap_aes_pdata { |
f9fb69e7 MG |
121 | struct omap_aes_algs_info *algs_info; |
122 | unsigned int algs_info_size; | |
123 | ||
0d35583a MG |
124 | void (*trigger)(struct omap_aes_dev *dd, int length); |
125 | ||
126 | u32 key_ofs; | |
127 | u32 iv_ofs; | |
128 | u32 ctrl_ofs; | |
129 | u32 data_ofs; | |
130 | u32 rev_ofs; | |
131 | u32 mask_ofs; | |
67216756 JF |
132 | u32 irq_enable_ofs; |
133 | u32 irq_status_ofs; | |
0d35583a MG |
134 | |
135 | u32 dma_enable_in; | |
136 | u32 dma_enable_out; | |
137 | u32 dma_start; | |
138 | ||
139 | u32 major_mask; | |
140 | u32 major_shift; | |
141 | u32 minor_mask; | |
142 | u32 minor_shift; | |
143 | }; | |
144 | ||
537559a5 DK |
145 | struct omap_aes_dev { |
146 | struct list_head list; | |
147 | unsigned long phys_base; | |
efce41b6 | 148 | void __iomem *io_base; |
537559a5 DK |
149 | struct omap_aes_ctx *ctx; |
150 | struct device *dev; | |
151 | unsigned long flags; | |
21fe9767 | 152 | int err; |
537559a5 | 153 | |
21fe9767 DK |
154 | spinlock_t lock; |
155 | struct crypto_queue queue; | |
537559a5 | 156 | |
21fe9767 DK |
157 | struct tasklet_struct done_task; |
158 | struct tasklet_struct queue_task; | |
537559a5 DK |
159 | |
160 | struct ablkcipher_request *req; | |
6242332f JF |
161 | |
162 | /* | |
163 | * total is used by PIO mode for book keeping so introduce | |
164 | * variable total_save as need it to calc page_order | |
165 | */ | |
537559a5 | 166 | size_t total; |
6242332f JF |
167 | size_t total_save; |
168 | ||
537559a5 | 169 | struct scatterlist *in_sg; |
537559a5 | 170 | struct scatterlist *out_sg; |
6242332f JF |
171 | |
172 | /* Buffers for copying for unaligned cases */ | |
173 | struct scatterlist in_sgl; | |
174 | struct scatterlist out_sgl; | |
175 | struct scatterlist *orig_out; | |
176 | int sgs_copied; | |
177 | ||
1bf95cca JF |
178 | struct scatter_walk in_walk; |
179 | struct scatter_walk out_walk; | |
537559a5 | 180 | int dma_in; |
ebedbf79 | 181 | struct dma_chan *dma_lch_in; |
537559a5 | 182 | int dma_out; |
ebedbf79 | 183 | struct dma_chan *dma_lch_out; |
e77c756e JF |
184 | int in_sg_len; |
185 | int out_sg_len; | |
98837abc | 186 | int pio_only; |
0d35583a | 187 | const struct omap_aes_pdata *pdata; |
537559a5 DK |
188 | }; |
189 | ||
190 | /* keep registered devices data here */ | |
191 | static LIST_HEAD(dev_list); | |
192 | static DEFINE_SPINLOCK(list_lock); | |
193 | ||
016af9b5 JF |
194 | #ifdef DEBUG |
195 | #define omap_aes_read(dd, offset) \ | |
196 | ({ \ | |
197 | int _read_ret; \ | |
198 | _read_ret = __raw_readl(dd->io_base + offset); \ | |
199 | pr_debug("omap_aes_read(" #offset "=%#x)= %#x\n", \ | |
200 | offset, _read_ret); \ | |
201 | _read_ret; \ | |
202 | }) | |
203 | #else | |
537559a5 DK |
204 | static inline u32 omap_aes_read(struct omap_aes_dev *dd, u32 offset) |
205 | { | |
206 | return __raw_readl(dd->io_base + offset); | |
207 | } | |
016af9b5 JF |
208 | #endif |
209 | ||
210 | #ifdef DEBUG | |
211 | #define omap_aes_write(dd, offset, value) \ | |
212 | do { \ | |
213 | pr_debug("omap_aes_write(" #offset "=%#x) value=%#x\n", \ | |
214 | offset, value); \ | |
215 | __raw_writel(value, dd->io_base + offset); \ | |
216 | } while (0) | |
217 | #else | |
537559a5 DK |
218 | static inline void omap_aes_write(struct omap_aes_dev *dd, u32 offset, |
219 | u32 value) | |
220 | { | |
221 | __raw_writel(value, dd->io_base + offset); | |
222 | } | |
016af9b5 | 223 | #endif |
537559a5 DK |
224 | |
225 | static inline void omap_aes_write_mask(struct omap_aes_dev *dd, u32 offset, | |
226 | u32 value, u32 mask) | |
227 | { | |
228 | u32 val; | |
229 | ||
230 | val = omap_aes_read(dd, offset); | |
231 | val &= ~mask; | |
232 | val |= value; | |
233 | omap_aes_write(dd, offset, val); | |
234 | } | |
235 | ||
236 | static void omap_aes_write_n(struct omap_aes_dev *dd, u32 offset, | |
237 | u32 *value, int count) | |
238 | { | |
239 | for (; count--; value++, offset += 4) | |
240 | omap_aes_write(dd, offset, *value); | |
241 | } | |
242 | ||
537559a5 DK |
243 | static int omap_aes_hw_init(struct omap_aes_dev *dd) |
244 | { | |
537559a5 | 245 | if (!(dd->flags & FLAGS_INIT)) { |
eeb2b202 | 246 | dd->flags |= FLAGS_INIT; |
21fe9767 | 247 | dd->err = 0; |
537559a5 DK |
248 | } |
249 | ||
eeb2b202 | 250 | return 0; |
537559a5 DK |
251 | } |
252 | ||
21fe9767 | 253 | static int omap_aes_write_ctrl(struct omap_aes_dev *dd) |
537559a5 DK |
254 | { |
255 | unsigned int key32; | |
67a730ce | 256 | int i, err; |
f9fb69e7 | 257 | u32 val, mask = 0; |
537559a5 | 258 | |
21fe9767 DK |
259 | err = omap_aes_hw_init(dd); |
260 | if (err) | |
261 | return err; | |
262 | ||
537559a5 | 263 | key32 = dd->ctx->keylen / sizeof(u32); |
67a730ce DK |
264 | |
265 | /* it seems a key should always be set even if it has not changed */ | |
537559a5 | 266 | for (i = 0; i < key32; i++) { |
0d35583a | 267 | omap_aes_write(dd, AES_REG_KEY(dd, i), |
537559a5 DK |
268 | __le32_to_cpu(dd->ctx->key[i])); |
269 | } | |
537559a5 | 270 | |
f9fb69e7 | 271 | if ((dd->flags & (FLAGS_CBC | FLAGS_CTR)) && dd->req->info) |
0d35583a | 272 | omap_aes_write_n(dd, AES_REG_IV(dd, 0), dd->req->info, 4); |
67a730ce DK |
273 | |
274 | val = FLD_VAL(((dd->ctx->keylen >> 3) - 1), 4, 3); | |
275 | if (dd->flags & FLAGS_CBC) | |
276 | val |= AES_REG_CTRL_CBC; | |
f9fb69e7 | 277 | if (dd->flags & FLAGS_CTR) { |
8ed49c76 | 278 | val |= AES_REG_CTRL_CTR | AES_REG_CTRL_CTR_WIDTH_128; |
f9fb69e7 MG |
279 | mask = AES_REG_CTRL_CTR | AES_REG_CTRL_CTR_WIDTH_MASK; |
280 | } | |
67a730ce DK |
281 | if (dd->flags & FLAGS_ENCRYPT) |
282 | val |= AES_REG_CTRL_DIRECTION; | |
537559a5 | 283 | |
f9fb69e7 | 284 | mask |= AES_REG_CTRL_CBC | AES_REG_CTRL_DIRECTION | |
537559a5 DK |
285 | AES_REG_CTRL_KEY_SIZE; |
286 | ||
0d35583a | 287 | omap_aes_write_mask(dd, AES_REG_CTRL(dd), val, mask); |
537559a5 | 288 | |
21fe9767 | 289 | return 0; |
537559a5 DK |
290 | } |
291 | ||
0d35583a MG |
292 | static void omap_aes_dma_trigger_omap2(struct omap_aes_dev *dd, int length) |
293 | { | |
294 | u32 mask, val; | |
295 | ||
296 | val = dd->pdata->dma_start; | |
297 | ||
298 | if (dd->dma_lch_out != NULL) | |
299 | val |= dd->pdata->dma_enable_out; | |
300 | if (dd->dma_lch_in != NULL) | |
301 | val |= dd->pdata->dma_enable_in; | |
302 | ||
303 | mask = dd->pdata->dma_enable_out | dd->pdata->dma_enable_in | | |
304 | dd->pdata->dma_start; | |
305 | ||
306 | omap_aes_write_mask(dd, AES_REG_MASK(dd), val, mask); | |
307 | ||
308 | } | |
309 | ||
310 | static void omap_aes_dma_trigger_omap4(struct omap_aes_dev *dd, int length) | |
311 | { | |
312 | omap_aes_write(dd, AES_REG_LENGTH_N(0), length); | |
313 | omap_aes_write(dd, AES_REG_LENGTH_N(1), 0); | |
314 | ||
315 | omap_aes_dma_trigger_omap2(dd, length); | |
316 | } | |
317 | ||
318 | static void omap_aes_dma_stop(struct omap_aes_dev *dd) | |
319 | { | |
320 | u32 mask; | |
321 | ||
322 | mask = dd->pdata->dma_enable_out | dd->pdata->dma_enable_in | | |
323 | dd->pdata->dma_start; | |
324 | ||
325 | omap_aes_write_mask(dd, AES_REG_MASK(dd), 0, mask); | |
326 | } | |
327 | ||
537559a5 DK |
328 | static struct omap_aes_dev *omap_aes_find_dev(struct omap_aes_ctx *ctx) |
329 | { | |
330 | struct omap_aes_dev *dd = NULL, *tmp; | |
331 | ||
332 | spin_lock_bh(&list_lock); | |
333 | if (!ctx->dd) { | |
334 | list_for_each_entry(tmp, &dev_list, list) { | |
335 | /* FIXME: take fist available aes core */ | |
336 | dd = tmp; | |
337 | break; | |
338 | } | |
339 | ctx->dd = dd; | |
340 | } else { | |
341 | /* already found before */ | |
342 | dd = ctx->dd; | |
343 | } | |
344 | spin_unlock_bh(&list_lock); | |
345 | ||
346 | return dd; | |
347 | } | |
348 | ||
ebedbf79 MG |
349 | static void omap_aes_dma_out_callback(void *data) |
350 | { | |
351 | struct omap_aes_dev *dd = data; | |
352 | ||
353 | /* dma_lch_out - completed */ | |
354 | tasklet_schedule(&dd->done_task); | |
355 | } | |
537559a5 DK |
356 | |
357 | static int omap_aes_dma_init(struct omap_aes_dev *dd) | |
358 | { | |
359 | int err = -ENOMEM; | |
ebedbf79 | 360 | dma_cap_mask_t mask; |
537559a5 | 361 | |
ebedbf79 MG |
362 | dd->dma_lch_out = NULL; |
363 | dd->dma_lch_in = NULL; | |
537559a5 | 364 | |
ebedbf79 MG |
365 | dma_cap_zero(mask); |
366 | dma_cap_set(DMA_SLAVE, mask); | |
367 | ||
b4b87a93 MG |
368 | dd->dma_lch_in = dma_request_slave_channel_compat(mask, |
369 | omap_dma_filter_fn, | |
370 | &dd->dma_in, | |
371 | dd->dev, "rx"); | |
ebedbf79 MG |
372 | if (!dd->dma_lch_in) { |
373 | dev_err(dd->dev, "Unable to request in DMA channel\n"); | |
374 | goto err_dma_in; | |
375 | } | |
376 | ||
b4b87a93 MG |
377 | dd->dma_lch_out = dma_request_slave_channel_compat(mask, |
378 | omap_dma_filter_fn, | |
379 | &dd->dma_out, | |
380 | dd->dev, "tx"); | |
ebedbf79 MG |
381 | if (!dd->dma_lch_out) { |
382 | dev_err(dd->dev, "Unable to request out DMA channel\n"); | |
383 | goto err_dma_out; | |
384 | } | |
537559a5 | 385 | |
537559a5 DK |
386 | return 0; |
387 | ||
388 | err_dma_out: | |
ebedbf79 | 389 | dma_release_channel(dd->dma_lch_in); |
537559a5 | 390 | err_dma_in: |
537559a5 DK |
391 | if (err) |
392 | pr_err("error: %d\n", err); | |
393 | return err; | |
394 | } | |
395 | ||
396 | static void omap_aes_dma_cleanup(struct omap_aes_dev *dd) | |
397 | { | |
ebedbf79 MG |
398 | dma_release_channel(dd->dma_lch_out); |
399 | dma_release_channel(dd->dma_lch_in); | |
537559a5 DK |
400 | } |
401 | ||
402 | static void sg_copy_buf(void *buf, struct scatterlist *sg, | |
403 | unsigned int start, unsigned int nbytes, int out) | |
404 | { | |
405 | struct scatter_walk walk; | |
406 | ||
407 | if (!nbytes) | |
408 | return; | |
409 | ||
410 | scatterwalk_start(&walk, sg); | |
411 | scatterwalk_advance(&walk, start); | |
412 | scatterwalk_copychunks(buf, &walk, nbytes, out); | |
413 | scatterwalk_done(&walk, out, 0); | |
414 | } | |
415 | ||
ebedbf79 | 416 | static int omap_aes_crypt_dma(struct crypto_tfm *tfm, |
4b645c94 JF |
417 | struct scatterlist *in_sg, struct scatterlist *out_sg, |
418 | int in_sg_len, int out_sg_len) | |
537559a5 DK |
419 | { |
420 | struct omap_aes_ctx *ctx = crypto_tfm_ctx(tfm); | |
421 | struct omap_aes_dev *dd = ctx->dd; | |
ebedbf79 MG |
422 | struct dma_async_tx_descriptor *tx_in, *tx_out; |
423 | struct dma_slave_config cfg; | |
4b645c94 | 424 | int ret; |
537559a5 | 425 | |
98837abc JF |
426 | if (dd->pio_only) { |
427 | scatterwalk_start(&dd->in_walk, dd->in_sg); | |
428 | scatterwalk_start(&dd->out_walk, dd->out_sg); | |
429 | ||
430 | /* Enable DATAIN interrupt and let it take | |
431 | care of the rest */ | |
432 | omap_aes_write(dd, AES_REG_IRQ_ENABLE(dd), 0x2); | |
433 | return 0; | |
434 | } | |
435 | ||
0a641712 JF |
436 | dma_sync_sg_for_device(dd->dev, dd->in_sg, in_sg_len, DMA_TO_DEVICE); |
437 | ||
ebedbf79 MG |
438 | memset(&cfg, 0, sizeof(cfg)); |
439 | ||
0d35583a MG |
440 | cfg.src_addr = dd->phys_base + AES_REG_DATA_N(dd, 0); |
441 | cfg.dst_addr = dd->phys_base + AES_REG_DATA_N(dd, 0); | |
ebedbf79 MG |
442 | cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; |
443 | cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; | |
444 | cfg.src_maxburst = DST_MAXBURST; | |
445 | cfg.dst_maxburst = DST_MAXBURST; | |
446 | ||
447 | /* IN */ | |
448 | ret = dmaengine_slave_config(dd->dma_lch_in, &cfg); | |
449 | if (ret) { | |
450 | dev_err(dd->dev, "can't configure IN dmaengine slave: %d\n", | |
451 | ret); | |
452 | return ret; | |
453 | } | |
454 | ||
4b645c94 | 455 | tx_in = dmaengine_prep_slave_sg(dd->dma_lch_in, in_sg, in_sg_len, |
ebedbf79 MG |
456 | DMA_MEM_TO_DEV, |
457 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); | |
458 | if (!tx_in) { | |
459 | dev_err(dd->dev, "IN prep_slave_sg() failed\n"); | |
460 | return -EINVAL; | |
461 | } | |
462 | ||
463 | /* No callback necessary */ | |
464 | tx_in->callback_param = dd; | |
465 | ||
466 | /* OUT */ | |
467 | ret = dmaengine_slave_config(dd->dma_lch_out, &cfg); | |
468 | if (ret) { | |
469 | dev_err(dd->dev, "can't configure OUT dmaengine slave: %d\n", | |
470 | ret); | |
471 | return ret; | |
472 | } | |
473 | ||
4b645c94 | 474 | tx_out = dmaengine_prep_slave_sg(dd->dma_lch_out, out_sg, out_sg_len, |
ebedbf79 MG |
475 | DMA_DEV_TO_MEM, |
476 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); | |
477 | if (!tx_out) { | |
478 | dev_err(dd->dev, "OUT prep_slave_sg() failed\n"); | |
479 | return -EINVAL; | |
480 | } | |
481 | ||
482 | tx_out->callback = omap_aes_dma_out_callback; | |
483 | tx_out->callback_param = dd; | |
484 | ||
485 | dmaengine_submit(tx_in); | |
486 | dmaengine_submit(tx_out); | |
487 | ||
488 | dma_async_issue_pending(dd->dma_lch_in); | |
489 | dma_async_issue_pending(dd->dma_lch_out); | |
537559a5 | 490 | |
0d35583a | 491 | /* start DMA */ |
4b645c94 | 492 | dd->pdata->trigger(dd, dd->total); |
83ea7e0f | 493 | |
537559a5 DK |
494 | return 0; |
495 | } | |
496 | ||
497 | static int omap_aes_crypt_dma_start(struct omap_aes_dev *dd) | |
498 | { | |
499 | struct crypto_tfm *tfm = crypto_ablkcipher_tfm( | |
500 | crypto_ablkcipher_reqtfm(dd->req)); | |
4b645c94 | 501 | int err; |
537559a5 DK |
502 | |
503 | pr_debug("total: %d\n", dd->total); | |
504 | ||
98837abc JF |
505 | if (!dd->pio_only) { |
506 | err = dma_map_sg(dd->dev, dd->in_sg, dd->in_sg_len, | |
507 | DMA_TO_DEVICE); | |
508 | if (!err) { | |
509 | dev_err(dd->dev, "dma_map_sg() error\n"); | |
510 | return -EINVAL; | |
511 | } | |
537559a5 | 512 | |
98837abc JF |
513 | err = dma_map_sg(dd->dev, dd->out_sg, dd->out_sg_len, |
514 | DMA_FROM_DEVICE); | |
515 | if (!err) { | |
516 | dev_err(dd->dev, "dma_map_sg() error\n"); | |
517 | return -EINVAL; | |
518 | } | |
537559a5 DK |
519 | } |
520 | ||
4b645c94 JF |
521 | err = omap_aes_crypt_dma(tfm, dd->in_sg, dd->out_sg, dd->in_sg_len, |
522 | dd->out_sg_len); | |
98837abc | 523 | if (err && !dd->pio_only) { |
4b645c94 JF |
524 | dma_unmap_sg(dd->dev, dd->in_sg, dd->in_sg_len, DMA_TO_DEVICE); |
525 | dma_unmap_sg(dd->dev, dd->out_sg, dd->out_sg_len, | |
526 | DMA_FROM_DEVICE); | |
21fe9767 | 527 | } |
537559a5 DK |
528 | |
529 | return err; | |
530 | } | |
531 | ||
532 | static void omap_aes_finish_req(struct omap_aes_dev *dd, int err) | |
533 | { | |
21fe9767 | 534 | struct ablkcipher_request *req = dd->req; |
537559a5 DK |
535 | |
536 | pr_debug("err: %d\n", err); | |
537 | ||
eeb2b202 DK |
538 | dd->flags &= ~FLAGS_BUSY; |
539 | ||
67a730ce | 540 | req->base.complete(&req->base, err); |
537559a5 DK |
541 | } |
542 | ||
543 | static int omap_aes_crypt_dma_stop(struct omap_aes_dev *dd) | |
544 | { | |
545 | int err = 0; | |
537559a5 DK |
546 | |
547 | pr_debug("total: %d\n", dd->total); | |
548 | ||
0d35583a | 549 | omap_aes_dma_stop(dd); |
537559a5 | 550 | |
ebedbf79 MG |
551 | dmaengine_terminate_all(dd->dma_lch_in); |
552 | dmaengine_terminate_all(dd->dma_lch_out); | |
537559a5 | 553 | |
537559a5 DK |
554 | return err; |
555 | } | |
556 | ||
034568e8 | 557 | static int omap_aes_check_aligned(struct scatterlist *sg) |
6242332f JF |
558 | { |
559 | while (sg) { | |
560 | if (!IS_ALIGNED(sg->offset, 4)) | |
561 | return -1; | |
562 | if (!IS_ALIGNED(sg->length, AES_BLOCK_SIZE)) | |
563 | return -1; | |
564 | sg = sg_next(sg); | |
565 | } | |
566 | return 0; | |
567 | } | |
568 | ||
034568e8 | 569 | static int omap_aes_copy_sgs(struct omap_aes_dev *dd) |
6242332f JF |
570 | { |
571 | void *buf_in, *buf_out; | |
572 | int pages; | |
573 | ||
574 | pages = get_order(dd->total); | |
575 | ||
576 | buf_in = (void *)__get_free_pages(GFP_ATOMIC, pages); | |
577 | buf_out = (void *)__get_free_pages(GFP_ATOMIC, pages); | |
578 | ||
579 | if (!buf_in || !buf_out) { | |
580 | pr_err("Couldn't allocated pages for unaligned cases.\n"); | |
581 | return -1; | |
582 | } | |
583 | ||
584 | dd->orig_out = dd->out_sg; | |
585 | ||
586 | sg_copy_buf(buf_in, dd->in_sg, 0, dd->total, 0); | |
587 | ||
588 | sg_init_table(&dd->in_sgl, 1); | |
589 | sg_set_buf(&dd->in_sgl, buf_in, dd->total); | |
590 | dd->in_sg = &dd->in_sgl; | |
591 | ||
592 | sg_init_table(&dd->out_sgl, 1); | |
593 | sg_set_buf(&dd->out_sgl, buf_out, dd->total); | |
594 | dd->out_sg = &dd->out_sgl; | |
595 | ||
596 | return 0; | |
597 | } | |
598 | ||
21fe9767 | 599 | static int omap_aes_handle_queue(struct omap_aes_dev *dd, |
eeb2b202 | 600 | struct ablkcipher_request *req) |
537559a5 DK |
601 | { |
602 | struct crypto_async_request *async_req, *backlog; | |
603 | struct omap_aes_ctx *ctx; | |
604 | struct omap_aes_reqctx *rctx; | |
537559a5 | 605 | unsigned long flags; |
21fe9767 | 606 | int err, ret = 0; |
537559a5 DK |
607 | |
608 | spin_lock_irqsave(&dd->lock, flags); | |
eeb2b202 | 609 | if (req) |
21fe9767 | 610 | ret = ablkcipher_enqueue_request(&dd->queue, req); |
eeb2b202 DK |
611 | if (dd->flags & FLAGS_BUSY) { |
612 | spin_unlock_irqrestore(&dd->lock, flags); | |
21fe9767 | 613 | return ret; |
eeb2b202 | 614 | } |
537559a5 DK |
615 | backlog = crypto_get_backlog(&dd->queue); |
616 | async_req = crypto_dequeue_request(&dd->queue); | |
eeb2b202 DK |
617 | if (async_req) |
618 | dd->flags |= FLAGS_BUSY; | |
537559a5 DK |
619 | spin_unlock_irqrestore(&dd->lock, flags); |
620 | ||
621 | if (!async_req) | |
21fe9767 | 622 | return ret; |
537559a5 DK |
623 | |
624 | if (backlog) | |
625 | backlog->complete(backlog, -EINPROGRESS); | |
626 | ||
627 | req = ablkcipher_request_cast(async_req); | |
628 | ||
537559a5 DK |
629 | /* assign new request to device */ |
630 | dd->req = req; | |
631 | dd->total = req->nbytes; | |
6242332f | 632 | dd->total_save = req->nbytes; |
537559a5 | 633 | dd->in_sg = req->src; |
537559a5 DK |
634 | dd->out_sg = req->dst; |
635 | ||
6242332f JF |
636 | if (omap_aes_check_aligned(dd->in_sg) || |
637 | omap_aes_check_aligned(dd->out_sg)) { | |
638 | if (omap_aes_copy_sgs(dd)) | |
639 | pr_err("Failed to copy SGs for unaligned cases\n"); | |
640 | dd->sgs_copied = 1; | |
641 | } else { | |
642 | dd->sgs_copied = 0; | |
643 | } | |
644 | ||
e77c756e JF |
645 | dd->in_sg_len = scatterwalk_bytes_sglen(dd->in_sg, dd->total); |
646 | dd->out_sg_len = scatterwalk_bytes_sglen(dd->out_sg, dd->total); | |
647 | BUG_ON(dd->in_sg_len < 0 || dd->out_sg_len < 0); | |
648 | ||
537559a5 DK |
649 | rctx = ablkcipher_request_ctx(req); |
650 | ctx = crypto_ablkcipher_ctx(crypto_ablkcipher_reqtfm(req)); | |
651 | rctx->mode &= FLAGS_MODE_MASK; | |
652 | dd->flags = (dd->flags & ~FLAGS_MODE_MASK) | rctx->mode; | |
653 | ||
67a730ce | 654 | dd->ctx = ctx; |
537559a5 | 655 | ctx->dd = dd; |
537559a5 | 656 | |
83ea7e0f DK |
657 | err = omap_aes_write_ctrl(dd); |
658 | if (!err) | |
659 | err = omap_aes_crypt_dma_start(dd); | |
21fe9767 DK |
660 | if (err) { |
661 | /* aes_task will not finish it, so do it here */ | |
662 | omap_aes_finish_req(dd, err); | |
663 | tasklet_schedule(&dd->queue_task); | |
664 | } | |
eeb2b202 | 665 | |
21fe9767 | 666 | return ret; /* return ret, which is enqueue return value */ |
537559a5 DK |
667 | } |
668 | ||
21fe9767 | 669 | static void omap_aes_done_task(unsigned long data) |
537559a5 DK |
670 | { |
671 | struct omap_aes_dev *dd = (struct omap_aes_dev *)data; | |
6242332f JF |
672 | void *buf_in, *buf_out; |
673 | int pages; | |
537559a5 | 674 | |
4b645c94 | 675 | pr_debug("enter done_task\n"); |
21fe9767 | 676 | |
98837abc JF |
677 | if (!dd->pio_only) { |
678 | dma_sync_sg_for_device(dd->dev, dd->out_sg, dd->out_sg_len, | |
679 | DMA_FROM_DEVICE); | |
6242332f JF |
680 | dma_unmap_sg(dd->dev, dd->in_sg, dd->in_sg_len, DMA_TO_DEVICE); |
681 | dma_unmap_sg(dd->dev, dd->out_sg, dd->out_sg_len, | |
682 | DMA_FROM_DEVICE); | |
98837abc JF |
683 | omap_aes_crypt_dma_stop(dd); |
684 | } | |
6242332f JF |
685 | |
686 | if (dd->sgs_copied) { | |
687 | buf_in = sg_virt(&dd->in_sgl); | |
688 | buf_out = sg_virt(&dd->out_sgl); | |
689 | ||
690 | sg_copy_buf(buf_out, dd->orig_out, 0, dd->total_save, 1); | |
691 | ||
692 | pages = get_order(dd->total_save); | |
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); |
21fe9767 | 698 | omap_aes_handle_queue(dd, NULL); |
537559a5 DK |
699 | |
700 | pr_debug("exit\n"); | |
701 | } | |
702 | ||
21fe9767 DK |
703 | static void omap_aes_queue_task(unsigned long data) |
704 | { | |
705 | struct omap_aes_dev *dd = (struct omap_aes_dev *)data; | |
706 | ||
707 | omap_aes_handle_queue(dd, NULL); | |
708 | } | |
709 | ||
537559a5 DK |
710 | static int omap_aes_crypt(struct ablkcipher_request *req, unsigned long mode) |
711 | { | |
712 | struct omap_aes_ctx *ctx = crypto_ablkcipher_ctx( | |
713 | crypto_ablkcipher_reqtfm(req)); | |
714 | struct omap_aes_reqctx *rctx = ablkcipher_request_ctx(req); | |
715 | struct omap_aes_dev *dd; | |
537559a5 DK |
716 | |
717 | pr_debug("nbytes: %d, enc: %d, cbc: %d\n", req->nbytes, | |
718 | !!(mode & FLAGS_ENCRYPT), | |
719 | !!(mode & FLAGS_CBC)); | |
720 | ||
21fe9767 DK |
721 | if (!IS_ALIGNED(req->nbytes, AES_BLOCK_SIZE)) { |
722 | pr_err("request size is not exact amount of AES blocks\n"); | |
723 | return -EINVAL; | |
724 | } | |
725 | ||
537559a5 DK |
726 | dd = omap_aes_find_dev(ctx); |
727 | if (!dd) | |
728 | return -ENODEV; | |
729 | ||
730 | rctx->mode = mode; | |
731 | ||
21fe9767 | 732 | return omap_aes_handle_queue(dd, req); |
537559a5 DK |
733 | } |
734 | ||
735 | /* ********************** ALG API ************************************ */ | |
736 | ||
737 | static int omap_aes_setkey(struct crypto_ablkcipher *tfm, const u8 *key, | |
738 | unsigned int keylen) | |
739 | { | |
740 | struct omap_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm); | |
741 | ||
742 | if (keylen != AES_KEYSIZE_128 && keylen != AES_KEYSIZE_192 && | |
743 | keylen != AES_KEYSIZE_256) | |
744 | return -EINVAL; | |
745 | ||
746 | pr_debug("enter, keylen: %d\n", keylen); | |
747 | ||
748 | memcpy(ctx->key, key, keylen); | |
749 | ctx->keylen = keylen; | |
537559a5 DK |
750 | |
751 | return 0; | |
752 | } | |
753 | ||
754 | static int omap_aes_ecb_encrypt(struct ablkcipher_request *req) | |
755 | { | |
756 | return omap_aes_crypt(req, FLAGS_ENCRYPT); | |
757 | } | |
758 | ||
759 | static int omap_aes_ecb_decrypt(struct ablkcipher_request *req) | |
760 | { | |
761 | return omap_aes_crypt(req, 0); | |
762 | } | |
763 | ||
764 | static int omap_aes_cbc_encrypt(struct ablkcipher_request *req) | |
765 | { | |
766 | return omap_aes_crypt(req, FLAGS_ENCRYPT | FLAGS_CBC); | |
767 | } | |
768 | ||
769 | static int omap_aes_cbc_decrypt(struct ablkcipher_request *req) | |
770 | { | |
771 | return omap_aes_crypt(req, FLAGS_CBC); | |
772 | } | |
773 | ||
f9fb69e7 MG |
774 | static int omap_aes_ctr_encrypt(struct ablkcipher_request *req) |
775 | { | |
776 | return omap_aes_crypt(req, FLAGS_ENCRYPT | FLAGS_CTR); | |
777 | } | |
778 | ||
779 | static int omap_aes_ctr_decrypt(struct ablkcipher_request *req) | |
780 | { | |
781 | return omap_aes_crypt(req, FLAGS_CTR); | |
782 | } | |
783 | ||
537559a5 DK |
784 | static int omap_aes_cra_init(struct crypto_tfm *tfm) |
785 | { | |
a3485e68 | 786 | struct omap_aes_dev *dd = NULL; |
f7b2b5dd | 787 | int err; |
a3485e68 JF |
788 | |
789 | /* Find AES device, currently picks the first device */ | |
790 | spin_lock_bh(&list_lock); | |
791 | list_for_each_entry(dd, &dev_list, list) { | |
792 | break; | |
793 | } | |
794 | spin_unlock_bh(&list_lock); | |
537559a5 | 795 | |
f7b2b5dd NM |
796 | err = pm_runtime_get_sync(dd->dev); |
797 | if (err < 0) { | |
798 | dev_err(dd->dev, "%s: failed to get_sync(%d)\n", | |
799 | __func__, err); | |
800 | return err; | |
801 | } | |
802 | ||
537559a5 DK |
803 | tfm->crt_ablkcipher.reqsize = sizeof(struct omap_aes_reqctx); |
804 | ||
805 | return 0; | |
806 | } | |
807 | ||
808 | static void omap_aes_cra_exit(struct crypto_tfm *tfm) | |
809 | { | |
a3485e68 JF |
810 | struct omap_aes_dev *dd = NULL; |
811 | ||
812 | /* Find AES device, currently picks the first device */ | |
813 | spin_lock_bh(&list_lock); | |
814 | list_for_each_entry(dd, &dev_list, list) { | |
815 | break; | |
816 | } | |
817 | spin_unlock_bh(&list_lock); | |
818 | ||
819 | pm_runtime_put_sync(dd->dev); | |
537559a5 DK |
820 | } |
821 | ||
822 | /* ********************** ALGS ************************************ */ | |
823 | ||
f9fb69e7 | 824 | static struct crypto_alg algs_ecb_cbc[] = { |
537559a5 DK |
825 | { |
826 | .cra_name = "ecb(aes)", | |
827 | .cra_driver_name = "ecb-aes-omap", | |
828 | .cra_priority = 100, | |
d912bb76 NM |
829 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | |
830 | CRYPTO_ALG_KERN_DRIVER_ONLY | | |
831 | CRYPTO_ALG_ASYNC, | |
537559a5 DK |
832 | .cra_blocksize = AES_BLOCK_SIZE, |
833 | .cra_ctxsize = sizeof(struct omap_aes_ctx), | |
efce41b6 | 834 | .cra_alignmask = 0, |
537559a5 DK |
835 | .cra_type = &crypto_ablkcipher_type, |
836 | .cra_module = THIS_MODULE, | |
837 | .cra_init = omap_aes_cra_init, | |
838 | .cra_exit = omap_aes_cra_exit, | |
839 | .cra_u.ablkcipher = { | |
840 | .min_keysize = AES_MIN_KEY_SIZE, | |
841 | .max_keysize = AES_MAX_KEY_SIZE, | |
842 | .setkey = omap_aes_setkey, | |
843 | .encrypt = omap_aes_ecb_encrypt, | |
844 | .decrypt = omap_aes_ecb_decrypt, | |
845 | } | |
846 | }, | |
847 | { | |
848 | .cra_name = "cbc(aes)", | |
849 | .cra_driver_name = "cbc-aes-omap", | |
850 | .cra_priority = 100, | |
d912bb76 NM |
851 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | |
852 | CRYPTO_ALG_KERN_DRIVER_ONLY | | |
853 | CRYPTO_ALG_ASYNC, | |
537559a5 DK |
854 | .cra_blocksize = AES_BLOCK_SIZE, |
855 | .cra_ctxsize = sizeof(struct omap_aes_ctx), | |
efce41b6 | 856 | .cra_alignmask = 0, |
537559a5 DK |
857 | .cra_type = &crypto_ablkcipher_type, |
858 | .cra_module = THIS_MODULE, | |
859 | .cra_init = omap_aes_cra_init, | |
860 | .cra_exit = omap_aes_cra_exit, | |
861 | .cra_u.ablkcipher = { | |
862 | .min_keysize = AES_MIN_KEY_SIZE, | |
863 | .max_keysize = AES_MAX_KEY_SIZE, | |
864 | .ivsize = AES_BLOCK_SIZE, | |
865 | .setkey = omap_aes_setkey, | |
866 | .encrypt = omap_aes_cbc_encrypt, | |
867 | .decrypt = omap_aes_cbc_decrypt, | |
868 | } | |
869 | } | |
870 | }; | |
871 | ||
f9fb69e7 MG |
872 | static struct crypto_alg algs_ctr[] = { |
873 | { | |
874 | .cra_name = "ctr(aes)", | |
875 | .cra_driver_name = "ctr-aes-omap", | |
876 | .cra_priority = 100, | |
877 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | | |
878 | CRYPTO_ALG_KERN_DRIVER_ONLY | | |
879 | CRYPTO_ALG_ASYNC, | |
880 | .cra_blocksize = AES_BLOCK_SIZE, | |
881 | .cra_ctxsize = sizeof(struct omap_aes_ctx), | |
882 | .cra_alignmask = 0, | |
883 | .cra_type = &crypto_ablkcipher_type, | |
884 | .cra_module = THIS_MODULE, | |
885 | .cra_init = omap_aes_cra_init, | |
886 | .cra_exit = omap_aes_cra_exit, | |
887 | .cra_u.ablkcipher = { | |
888 | .min_keysize = AES_MIN_KEY_SIZE, | |
889 | .max_keysize = AES_MAX_KEY_SIZE, | |
890 | .geniv = "eseqiv", | |
891 | .ivsize = AES_BLOCK_SIZE, | |
892 | .setkey = omap_aes_setkey, | |
893 | .encrypt = omap_aes_ctr_encrypt, | |
894 | .decrypt = omap_aes_ctr_decrypt, | |
895 | } | |
896 | } , | |
897 | }; | |
898 | ||
899 | static struct omap_aes_algs_info omap_aes_algs_info_ecb_cbc[] = { | |
900 | { | |
901 | .algs_list = algs_ecb_cbc, | |
902 | .size = ARRAY_SIZE(algs_ecb_cbc), | |
903 | }, | |
904 | }; | |
905 | ||
0d35583a | 906 | static const struct omap_aes_pdata omap_aes_pdata_omap2 = { |
f9fb69e7 MG |
907 | .algs_info = omap_aes_algs_info_ecb_cbc, |
908 | .algs_info_size = ARRAY_SIZE(omap_aes_algs_info_ecb_cbc), | |
0d35583a MG |
909 | .trigger = omap_aes_dma_trigger_omap2, |
910 | .key_ofs = 0x1c, | |
911 | .iv_ofs = 0x20, | |
912 | .ctrl_ofs = 0x30, | |
913 | .data_ofs = 0x34, | |
914 | .rev_ofs = 0x44, | |
915 | .mask_ofs = 0x48, | |
916 | .dma_enable_in = BIT(2), | |
917 | .dma_enable_out = BIT(3), | |
918 | .dma_start = BIT(5), | |
919 | .major_mask = 0xf0, | |
920 | .major_shift = 4, | |
921 | .minor_mask = 0x0f, | |
922 | .minor_shift = 0, | |
923 | }; | |
924 | ||
bc69d124 | 925 | #ifdef CONFIG_OF |
f9fb69e7 MG |
926 | static struct omap_aes_algs_info omap_aes_algs_info_ecb_cbc_ctr[] = { |
927 | { | |
928 | .algs_list = algs_ecb_cbc, | |
929 | .size = ARRAY_SIZE(algs_ecb_cbc), | |
930 | }, | |
931 | { | |
932 | .algs_list = algs_ctr, | |
933 | .size = ARRAY_SIZE(algs_ctr), | |
934 | }, | |
935 | }; | |
936 | ||
937 | static const struct omap_aes_pdata omap_aes_pdata_omap3 = { | |
938 | .algs_info = omap_aes_algs_info_ecb_cbc_ctr, | |
939 | .algs_info_size = ARRAY_SIZE(omap_aes_algs_info_ecb_cbc_ctr), | |
940 | .trigger = omap_aes_dma_trigger_omap2, | |
941 | .key_ofs = 0x1c, | |
942 | .iv_ofs = 0x20, | |
943 | .ctrl_ofs = 0x30, | |
944 | .data_ofs = 0x34, | |
945 | .rev_ofs = 0x44, | |
946 | .mask_ofs = 0x48, | |
947 | .dma_enable_in = BIT(2), | |
948 | .dma_enable_out = BIT(3), | |
949 | .dma_start = BIT(5), | |
950 | .major_mask = 0xf0, | |
951 | .major_shift = 4, | |
952 | .minor_mask = 0x0f, | |
953 | .minor_shift = 0, | |
954 | }; | |
955 | ||
0d35583a | 956 | static const struct omap_aes_pdata omap_aes_pdata_omap4 = { |
f9fb69e7 MG |
957 | .algs_info = omap_aes_algs_info_ecb_cbc_ctr, |
958 | .algs_info_size = ARRAY_SIZE(omap_aes_algs_info_ecb_cbc_ctr), | |
0d35583a MG |
959 | .trigger = omap_aes_dma_trigger_omap4, |
960 | .key_ofs = 0x3c, | |
961 | .iv_ofs = 0x40, | |
962 | .ctrl_ofs = 0x50, | |
963 | .data_ofs = 0x60, | |
964 | .rev_ofs = 0x80, | |
965 | .mask_ofs = 0x84, | |
67216756 JF |
966 | .irq_status_ofs = 0x8c, |
967 | .irq_enable_ofs = 0x90, | |
0d35583a MG |
968 | .dma_enable_in = BIT(5), |
969 | .dma_enable_out = BIT(6), | |
970 | .major_mask = 0x0700, | |
971 | .major_shift = 8, | |
972 | .minor_mask = 0x003f, | |
973 | .minor_shift = 0, | |
974 | }; | |
975 | ||
1bf95cca JF |
976 | static irqreturn_t omap_aes_irq(int irq, void *dev_id) |
977 | { | |
978 | struct omap_aes_dev *dd = dev_id; | |
979 | u32 status, i; | |
980 | u32 *src, *dst; | |
981 | ||
982 | status = omap_aes_read(dd, AES_REG_IRQ_STATUS(dd)); | |
983 | if (status & AES_REG_IRQ_DATA_IN) { | |
984 | omap_aes_write(dd, AES_REG_IRQ_ENABLE(dd), 0x0); | |
985 | ||
986 | BUG_ON(!dd->in_sg); | |
987 | ||
988 | BUG_ON(_calc_walked(in) > dd->in_sg->length); | |
989 | ||
990 | src = sg_virt(dd->in_sg) + _calc_walked(in); | |
991 | ||
992 | for (i = 0; i < AES_BLOCK_WORDS; i++) { | |
993 | omap_aes_write(dd, AES_REG_DATA_N(dd, i), *src); | |
994 | ||
995 | scatterwalk_advance(&dd->in_walk, 4); | |
996 | if (dd->in_sg->length == _calc_walked(in)) { | |
997 | dd->in_sg = scatterwalk_sg_next(dd->in_sg); | |
998 | if (dd->in_sg) { | |
999 | scatterwalk_start(&dd->in_walk, | |
1000 | dd->in_sg); | |
1001 | src = sg_virt(dd->in_sg) + | |
1002 | _calc_walked(in); | |
1003 | } | |
1004 | } else { | |
1005 | src++; | |
1006 | } | |
1007 | } | |
1008 | ||
1009 | /* Clear IRQ status */ | |
1010 | status &= ~AES_REG_IRQ_DATA_IN; | |
1011 | omap_aes_write(dd, AES_REG_IRQ_STATUS(dd), status); | |
1012 | ||
1013 | /* Enable DATA_OUT interrupt */ | |
1014 | omap_aes_write(dd, AES_REG_IRQ_ENABLE(dd), 0x4); | |
1015 | ||
1016 | } else if (status & AES_REG_IRQ_DATA_OUT) { | |
1017 | omap_aes_write(dd, AES_REG_IRQ_ENABLE(dd), 0x0); | |
1018 | ||
1019 | BUG_ON(!dd->out_sg); | |
1020 | ||
1021 | BUG_ON(_calc_walked(out) > dd->out_sg->length); | |
1022 | ||
1023 | dst = sg_virt(dd->out_sg) + _calc_walked(out); | |
1024 | ||
1025 | for (i = 0; i < AES_BLOCK_WORDS; i++) { | |
1026 | *dst = omap_aes_read(dd, AES_REG_DATA_N(dd, i)); | |
1027 | scatterwalk_advance(&dd->out_walk, 4); | |
1028 | if (dd->out_sg->length == _calc_walked(out)) { | |
1029 | dd->out_sg = scatterwalk_sg_next(dd->out_sg); | |
1030 | if (dd->out_sg) { | |
1031 | scatterwalk_start(&dd->out_walk, | |
1032 | dd->out_sg); | |
1033 | dst = sg_virt(dd->out_sg) + | |
1034 | _calc_walked(out); | |
1035 | } | |
1036 | } else { | |
1037 | dst++; | |
1038 | } | |
1039 | } | |
1040 | ||
1041 | dd->total -= AES_BLOCK_SIZE; | |
1042 | ||
1043 | BUG_ON(dd->total < 0); | |
1044 | ||
1045 | /* Clear IRQ status */ | |
1046 | status &= ~AES_REG_IRQ_DATA_OUT; | |
1047 | omap_aes_write(dd, AES_REG_IRQ_STATUS(dd), status); | |
1048 | ||
1049 | if (!dd->total) | |
1050 | /* All bytes read! */ | |
1051 | tasklet_schedule(&dd->done_task); | |
1052 | else | |
1053 | /* Enable DATA_IN interrupt for next block */ | |
1054 | omap_aes_write(dd, AES_REG_IRQ_ENABLE(dd), 0x2); | |
1055 | } | |
1056 | ||
1057 | return IRQ_HANDLED; | |
1058 | } | |
1059 | ||
bc69d124 MG |
1060 | static const struct of_device_id omap_aes_of_match[] = { |
1061 | { | |
1062 | .compatible = "ti,omap2-aes", | |
0d35583a MG |
1063 | .data = &omap_aes_pdata_omap2, |
1064 | }, | |
f9fb69e7 MG |
1065 | { |
1066 | .compatible = "ti,omap3-aes", | |
1067 | .data = &omap_aes_pdata_omap3, | |
1068 | }, | |
0d35583a MG |
1069 | { |
1070 | .compatible = "ti,omap4-aes", | |
1071 | .data = &omap_aes_pdata_omap4, | |
bc69d124 MG |
1072 | }, |
1073 | {}, | |
1074 | }; | |
1075 | MODULE_DEVICE_TABLE(of, omap_aes_of_match); | |
1076 | ||
1077 | static int omap_aes_get_res_of(struct omap_aes_dev *dd, | |
1078 | struct device *dev, struct resource *res) | |
1079 | { | |
1080 | struct device_node *node = dev->of_node; | |
1081 | const struct of_device_id *match; | |
1082 | int err = 0; | |
1083 | ||
1084 | match = of_match_device(of_match_ptr(omap_aes_of_match), dev); | |
1085 | if (!match) { | |
1086 | dev_err(dev, "no compatible OF match\n"); | |
1087 | err = -EINVAL; | |
1088 | goto err; | |
1089 | } | |
1090 | ||
1091 | err = of_address_to_resource(node, 0, res); | |
1092 | if (err < 0) { | |
1093 | dev_err(dev, "can't translate OF node address\n"); | |
1094 | err = -EINVAL; | |
1095 | goto err; | |
1096 | } | |
1097 | ||
1098 | dd->dma_out = -1; /* Dummy value that's unused */ | |
1099 | dd->dma_in = -1; /* Dummy value that's unused */ | |
1100 | ||
0d35583a MG |
1101 | dd->pdata = match->data; |
1102 | ||
bc69d124 MG |
1103 | err: |
1104 | return err; | |
1105 | } | |
1106 | #else | |
1107 | static const struct of_device_id omap_aes_of_match[] = { | |
1108 | {}, | |
1109 | }; | |
1110 | ||
1111 | static int omap_aes_get_res_of(struct omap_aes_dev *dd, | |
1112 | struct device *dev, struct resource *res) | |
1113 | { | |
1114 | return -EINVAL; | |
1115 | } | |
1116 | #endif | |
1117 | ||
1118 | static int omap_aes_get_res_pdev(struct omap_aes_dev *dd, | |
1119 | struct platform_device *pdev, struct resource *res) | |
1120 | { | |
1121 | struct device *dev = &pdev->dev; | |
1122 | struct resource *r; | |
1123 | int err = 0; | |
1124 | ||
1125 | /* Get the base address */ | |
1126 | r = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1127 | if (!r) { | |
1128 | dev_err(dev, "no MEM resource info\n"); | |
1129 | err = -ENODEV; | |
1130 | goto err; | |
1131 | } | |
1132 | memcpy(res, r, sizeof(*res)); | |
1133 | ||
1134 | /* Get the DMA out channel */ | |
1135 | r = platform_get_resource(pdev, IORESOURCE_DMA, 0); | |
1136 | if (!r) { | |
1137 | dev_err(dev, "no DMA out resource info\n"); | |
1138 | err = -ENODEV; | |
1139 | goto err; | |
1140 | } | |
1141 | dd->dma_out = r->start; | |
1142 | ||
1143 | /* Get the DMA in channel */ | |
1144 | r = platform_get_resource(pdev, IORESOURCE_DMA, 1); | |
1145 | if (!r) { | |
1146 | dev_err(dev, "no DMA in resource info\n"); | |
1147 | err = -ENODEV; | |
1148 | goto err; | |
1149 | } | |
1150 | dd->dma_in = r->start; | |
1151 | ||
0d35583a MG |
1152 | /* Only OMAP2/3 can be non-DT */ |
1153 | dd->pdata = &omap_aes_pdata_omap2; | |
1154 | ||
bc69d124 MG |
1155 | err: |
1156 | return err; | |
1157 | } | |
1158 | ||
537559a5 DK |
1159 | static int omap_aes_probe(struct platform_device *pdev) |
1160 | { | |
1161 | struct device *dev = &pdev->dev; | |
1162 | struct omap_aes_dev *dd; | |
f9fb69e7 | 1163 | struct crypto_alg *algp; |
bc69d124 | 1164 | struct resource res; |
1801ad94 | 1165 | int err = -ENOMEM, i, j, irq = -1; |
537559a5 DK |
1166 | u32 reg; |
1167 | ||
05007c10 | 1168 | dd = devm_kzalloc(dev, sizeof(struct omap_aes_dev), GFP_KERNEL); |
537559a5 DK |
1169 | if (dd == NULL) { |
1170 | dev_err(dev, "unable to alloc data struct.\n"); | |
1171 | goto err_data; | |
1172 | } | |
1173 | dd->dev = dev; | |
1174 | platform_set_drvdata(pdev, dd); | |
1175 | ||
1176 | spin_lock_init(&dd->lock); | |
1177 | crypto_init_queue(&dd->queue, OMAP_AES_QUEUE_LENGTH); | |
1178 | ||
bc69d124 MG |
1179 | err = (dev->of_node) ? omap_aes_get_res_of(dd, dev, &res) : |
1180 | omap_aes_get_res_pdev(dd, pdev, &res); | |
1181 | if (err) | |
537559a5 | 1182 | goto err_res; |
bc69d124 | 1183 | |
30862281 LN |
1184 | dd->io_base = devm_ioremap_resource(dev, &res); |
1185 | if (IS_ERR(dd->io_base)) { | |
1186 | err = PTR_ERR(dd->io_base); | |
5946c4a5 | 1187 | goto err_res; |
537559a5 | 1188 | } |
bc69d124 | 1189 | dd->phys_base = res.start; |
537559a5 | 1190 | |
5946c4a5 | 1191 | pm_runtime_enable(dev); |
f7b2b5dd NM |
1192 | err = pm_runtime_get_sync(dev); |
1193 | if (err < 0) { | |
1194 | dev_err(dev, "%s: failed to get_sync(%d)\n", | |
1195 | __func__, err); | |
1196 | goto err_res; | |
1197 | } | |
5946c4a5 | 1198 | |
0d35583a MG |
1199 | omap_aes_dma_stop(dd); |
1200 | ||
1201 | reg = omap_aes_read(dd, AES_REG_REV(dd)); | |
5946c4a5 MG |
1202 | |
1203 | pm_runtime_put_sync(dev); | |
537559a5 | 1204 | |
0d35583a MG |
1205 | dev_info(dev, "OMAP AES hw accel rev: %u.%u\n", |
1206 | (reg & dd->pdata->major_mask) >> dd->pdata->major_shift, | |
1207 | (reg & dd->pdata->minor_mask) >> dd->pdata->minor_shift); | |
1208 | ||
21fe9767 DK |
1209 | tasklet_init(&dd->done_task, omap_aes_done_task, (unsigned long)dd); |
1210 | tasklet_init(&dd->queue_task, omap_aes_queue_task, (unsigned long)dd); | |
537559a5 DK |
1211 | |
1212 | err = omap_aes_dma_init(dd); | |
1801ad94 JF |
1213 | if (err && AES_REG_IRQ_STATUS(dd) && AES_REG_IRQ_ENABLE(dd)) { |
1214 | dd->pio_only = 1; | |
1215 | ||
1216 | irq = platform_get_irq(pdev, 0); | |
1217 | if (irq < 0) { | |
1218 | dev_err(dev, "can't get IRQ resource\n"); | |
1219 | goto err_irq; | |
1220 | } | |
1221 | ||
bce2a228 | 1222 | err = devm_request_irq(dev, irq, omap_aes_irq, 0, |
1801ad94 JF |
1223 | dev_name(dev), dd); |
1224 | if (err) { | |
1225 | dev_err(dev, "Unable to grab omap-aes IRQ\n"); | |
1226 | goto err_irq; | |
1227 | } | |
1228 | } | |
1229 | ||
537559a5 DK |
1230 | |
1231 | INIT_LIST_HEAD(&dd->list); | |
1232 | spin_lock(&list_lock); | |
1233 | list_add_tail(&dd->list, &dev_list); | |
1234 | spin_unlock(&list_lock); | |
1235 | ||
f9fb69e7 MG |
1236 | for (i = 0; i < dd->pdata->algs_info_size; i++) { |
1237 | for (j = 0; j < dd->pdata->algs_info[i].size; j++) { | |
1238 | algp = &dd->pdata->algs_info[i].algs_list[j]; | |
1239 | ||
1240 | pr_debug("reg alg: %s\n", algp->cra_name); | |
1241 | INIT_LIST_HEAD(&algp->cra_list); | |
1242 | ||
1243 | err = crypto_register_alg(algp); | |
1244 | if (err) | |
1245 | goto err_algs; | |
1246 | ||
1247 | dd->pdata->algs_info[i].registered++; | |
1248 | } | |
537559a5 DK |
1249 | } |
1250 | ||
537559a5 DK |
1251 | return 0; |
1252 | err_algs: | |
f9fb69e7 MG |
1253 | for (i = dd->pdata->algs_info_size - 1; i >= 0; i--) |
1254 | for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--) | |
1255 | crypto_unregister_alg( | |
1256 | &dd->pdata->algs_info[i].algs_list[j]); | |
bce2a228 | 1257 | if (!dd->pio_only) |
1801ad94 JF |
1258 | omap_aes_dma_cleanup(dd); |
1259 | err_irq: | |
21fe9767 DK |
1260 | tasklet_kill(&dd->done_task); |
1261 | tasklet_kill(&dd->queue_task); | |
5946c4a5 | 1262 | pm_runtime_disable(dev); |
537559a5 | 1263 | err_res: |
537559a5 DK |
1264 | dd = NULL; |
1265 | err_data: | |
1266 | dev_err(dev, "initialization failed.\n"); | |
1267 | return err; | |
1268 | } | |
1269 | ||
1270 | static int omap_aes_remove(struct platform_device *pdev) | |
1271 | { | |
1272 | struct omap_aes_dev *dd = platform_get_drvdata(pdev); | |
f9fb69e7 | 1273 | int i, j; |
537559a5 DK |
1274 | |
1275 | if (!dd) | |
1276 | return -ENODEV; | |
1277 | ||
1278 | spin_lock(&list_lock); | |
1279 | list_del(&dd->list); | |
1280 | spin_unlock(&list_lock); | |
1281 | ||
f9fb69e7 MG |
1282 | for (i = dd->pdata->algs_info_size - 1; i >= 0; i--) |
1283 | for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--) | |
1284 | crypto_unregister_alg( | |
1285 | &dd->pdata->algs_info[i].algs_list[j]); | |
537559a5 | 1286 | |
21fe9767 DK |
1287 | tasklet_kill(&dd->done_task); |
1288 | tasklet_kill(&dd->queue_task); | |
537559a5 | 1289 | omap_aes_dma_cleanup(dd); |
5946c4a5 | 1290 | pm_runtime_disable(dd->dev); |
537559a5 DK |
1291 | dd = NULL; |
1292 | ||
1293 | return 0; | |
1294 | } | |
1295 | ||
0635fb3a MG |
1296 | #ifdef CONFIG_PM_SLEEP |
1297 | static int omap_aes_suspend(struct device *dev) | |
1298 | { | |
1299 | pm_runtime_put_sync(dev); | |
1300 | return 0; | |
1301 | } | |
1302 | ||
1303 | static int omap_aes_resume(struct device *dev) | |
1304 | { | |
1305 | pm_runtime_get_sync(dev); | |
1306 | return 0; | |
1307 | } | |
1308 | #endif | |
1309 | ||
1310 | static const struct dev_pm_ops omap_aes_pm_ops = { | |
1311 | SET_SYSTEM_SLEEP_PM_OPS(omap_aes_suspend, omap_aes_resume) | |
1312 | }; | |
1313 | ||
537559a5 DK |
1314 | static struct platform_driver omap_aes_driver = { |
1315 | .probe = omap_aes_probe, | |
1316 | .remove = omap_aes_remove, | |
1317 | .driver = { | |
1318 | .name = "omap-aes", | |
1319 | .owner = THIS_MODULE, | |
0635fb3a | 1320 | .pm = &omap_aes_pm_ops, |
bc69d124 | 1321 | .of_match_table = omap_aes_of_match, |
537559a5 DK |
1322 | }, |
1323 | }; | |
1324 | ||
94e51df9 | 1325 | module_platform_driver(omap_aes_driver); |
537559a5 DK |
1326 | |
1327 | MODULE_DESCRIPTION("OMAP AES hw acceleration support."); | |
1328 | MODULE_LICENSE("GPL v2"); | |
1329 | MODULE_AUTHOR("Dmitry Kasatkin"); | |
1330 |