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vfs: use __getname/__putname for getcwd() system call
[linux-2.6/btrfs-unstable.git] / drivers / crypto / omap-sham.c
blob8bdde57f6bb1d7050967351744571b352062f1e1
1 /*
2 * Cryptographic API.
3 *
4 * Support for OMAP SHA1/MD5 HW acceleration.
5 *
6 * Copyright (c) 2010 Nokia Corporation
7 * Author: Dmitry Kasatkin <dmitry.kasatkin@nokia.com>
8 * Copyright (c) 2011 Texas Instruments Incorporated
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 * Some ideas are from old omap-sha1-md5.c driver.
15 */
16
17 #define pr_fmt(fmt) "%s: " fmt, __func__
18
19 #include <linux/err.h>
20 #include <linux/device.h>
21 #include <linux/module.h>
22 #include <linux/init.h>
23 #include <linux/errno.h>
24 #include <linux/interrupt.h>
25 #include <linux/kernel.h>
26 #include <linux/irq.h>
27 #include <linux/io.h>
28 #include <linux/platform_device.h>
29 #include <linux/scatterlist.h>
30 #include <linux/dma-mapping.h>
31 #include <linux/dmaengine.h>
32 #include <linux/omap-dma.h>
33 #include <linux/pm_runtime.h>
34 #include <linux/of.h>
35 #include <linux/of_device.h>
36 #include <linux/of_address.h>
37 #include <linux/of_irq.h>
38 #include <linux/delay.h>
39 #include <linux/crypto.h>
40 #include <linux/cryptohash.h>
41 #include <crypto/scatterwalk.h>
42 #include <crypto/algapi.h>
43 #include <crypto/sha.h>
44 #include <crypto/hash.h>
45 #include <crypto/internal/hash.h>
46
47 #define MD5_DIGEST_SIZE 16
48
49 #define SHA_REG_IDIGEST(dd, x) ((dd)->pdata->idigest_ofs + ((x)*0x04))
50 #define SHA_REG_DIN(dd, x) ((dd)->pdata->din_ofs + ((x) * 0x04))
51 #define SHA_REG_DIGCNT(dd) ((dd)->pdata->digcnt_ofs)
52
53 #define SHA_REG_ODIGEST(dd, x) ((dd)->pdata->odigest_ofs + (x * 0x04))
54
55 #define SHA_REG_CTRL 0x18
56 #define SHA_REG_CTRL_LENGTH (0xFFFFFFFF << 5)
57 #define SHA_REG_CTRL_CLOSE_HASH (1 << 4)
58 #define SHA_REG_CTRL_ALGO_CONST (1 << 3)
59 #define SHA_REG_CTRL_ALGO (1 << 2)
60 #define SHA_REG_CTRL_INPUT_READY (1 << 1)
61 #define SHA_REG_CTRL_OUTPUT_READY (1 << 0)
62
63 #define SHA_REG_REV(dd) ((dd)->pdata->rev_ofs)
64
65 #define SHA_REG_MASK(dd) ((dd)->pdata->mask_ofs)
66 #define SHA_REG_MASK_DMA_EN (1 << 3)
67 #define SHA_REG_MASK_IT_EN (1 << 2)
68 #define SHA_REG_MASK_SOFTRESET (1 << 1)
69 #define SHA_REG_AUTOIDLE (1 << 0)
70
71 #define SHA_REG_SYSSTATUS(dd) ((dd)->pdata->sysstatus_ofs)
72 #define SHA_REG_SYSSTATUS_RESETDONE (1 << 0)
73
74 #define SHA_REG_MODE(dd) ((dd)->pdata->mode_ofs)
75 #define SHA_REG_MODE_HMAC_OUTER_HASH (1 << 7)
76 #define SHA_REG_MODE_HMAC_KEY_PROC (1 << 5)
77 #define SHA_REG_MODE_CLOSE_HASH (1 << 4)
78 #define SHA_REG_MODE_ALGO_CONSTANT (1 << 3)
79
80 #define SHA_REG_MODE_ALGO_MASK (7 << 0)
81 #define SHA_REG_MODE_ALGO_MD5_128 (0 << 1)
82 #define SHA_REG_MODE_ALGO_SHA1_160 (1 << 1)
83 #define SHA_REG_MODE_ALGO_SHA2_224 (2 << 1)
84 #define SHA_REG_MODE_ALGO_SHA2_256 (3 << 1)
85 #define SHA_REG_MODE_ALGO_SHA2_384 (1 << 0)
86 #define SHA_REG_MODE_ALGO_SHA2_512 (3 << 0)
87
88 #define SHA_REG_LENGTH(dd) ((dd)->pdata->length_ofs)
89
90 #define SHA_REG_IRQSTATUS 0x118
91 #define SHA_REG_IRQSTATUS_CTX_RDY (1 << 3)
92 #define SHA_REG_IRQSTATUS_PARTHASH_RDY (1 << 2)
93 #define SHA_REG_IRQSTATUS_INPUT_RDY (1 << 1)
94 #define SHA_REG_IRQSTATUS_OUTPUT_RDY (1 << 0)
95
96 #define SHA_REG_IRQENA 0x11C
97 #define SHA_REG_IRQENA_CTX_RDY (1 << 3)
98 #define SHA_REG_IRQENA_PARTHASH_RDY (1 << 2)
99 #define SHA_REG_IRQENA_INPUT_RDY (1 << 1)
100 #define SHA_REG_IRQENA_OUTPUT_RDY (1 << 0)
101
102 #define DEFAULT_TIMEOUT_INTERVAL HZ
103
104 /* mostly device flags */
105 #define FLAGS_BUSY 0
106 #define FLAGS_FINAL 1
107 #define FLAGS_DMA_ACTIVE 2
108 #define FLAGS_OUTPUT_READY 3
109 #define FLAGS_INIT 4
110 #define FLAGS_CPU 5
111 #define FLAGS_DMA_READY 6
112 #define FLAGS_AUTO_XOR 7
113 #define FLAGS_BE32_SHA1 8
114 /* context flags */
115 #define FLAGS_FINUP 16
116 #define FLAGS_SG 17
117
118 #define FLAGS_MODE_SHIFT 18
119 #define FLAGS_MODE_MASK (SHA_REG_MODE_ALGO_MASK << FLAGS_MODE_SHIFT)
120 #define FLAGS_MODE_MD5 (SHA_REG_MODE_ALGO_MD5_128 << FLAGS_MODE_SHIFT)
121 #define FLAGS_MODE_SHA1 (SHA_REG_MODE_ALGO_SHA1_160 << FLAGS_MODE_SHIFT)
122 #define FLAGS_MODE_SHA224 (SHA_REG_MODE_ALGO_SHA2_224 << FLAGS_MODE_SHIFT)
123 #define FLAGS_MODE_SHA256 (SHA_REG_MODE_ALGO_SHA2_256 << FLAGS_MODE_SHIFT)
124 #define FLAGS_MODE_SHA384 (SHA_REG_MODE_ALGO_SHA2_384 << FLAGS_MODE_SHIFT)
125 #define FLAGS_MODE_SHA512 (SHA_REG_MODE_ALGO_SHA2_512 << FLAGS_MODE_SHIFT)
126
127 #define FLAGS_HMAC 21
128 #define FLAGS_ERROR 22
129
130 #define OP_UPDATE 1
131 #define OP_FINAL 2
132
133 #define OMAP_ALIGN_MASK (sizeof(u32)-1)
134 #define OMAP_ALIGNED __attribute__((aligned(sizeof(u32))))
135
136 #define BUFLEN PAGE_SIZE
137
138 struct omap_sham_dev;
139
140 struct omap_sham_reqctx {
141 struct omap_sham_dev *dd;
142 unsigned long flags;
143 unsigned long op;
144
145 u8 digest[SHA512_DIGEST_SIZE] OMAP_ALIGNED;
146 size_t digcnt;
147 size_t bufcnt;
148 size_t buflen;
149 dma_addr_t dma_addr;
150
151 /* walk state */
152 struct scatterlist *sg;
153 struct scatterlist sgl;
154 unsigned int offset; /* offset in current sg */
155 unsigned int total; /* total request */
156
157 u8 buffer[0] OMAP_ALIGNED;
158 };
159
160 struct omap_sham_hmac_ctx {
161 struct crypto_shash *shash;
162 u8 ipad[SHA512_BLOCK_SIZE] OMAP_ALIGNED;
163 u8 opad[SHA512_BLOCK_SIZE] OMAP_ALIGNED;
164 };
165
166 struct omap_sham_ctx {
167 struct omap_sham_dev *dd;
168
169 unsigned long flags;
170
171 /* fallback stuff */
172 struct crypto_shash *fallback;
173
174 struct omap_sham_hmac_ctx base[0];
175 };
176
177 #define OMAP_SHAM_QUEUE_LENGTH 1
178
179 struct omap_sham_algs_info {
180 struct ahash_alg *algs_list;
181 unsigned int size;
182 unsigned int registered;
183 };
184
185 struct omap_sham_pdata {
186 struct omap_sham_algs_info *algs_info;
187 unsigned int algs_info_size;
188 unsigned long flags;
189 int digest_size;
190
191 void (*copy_hash)(struct ahash_request *req, int out);
192 void (*write_ctrl)(struct omap_sham_dev *dd, size_t length,
193 int final, int dma);
194 void (*trigger)(struct omap_sham_dev *dd, size_t length);
195 int (*poll_irq)(struct omap_sham_dev *dd);
196 irqreturn_t (*intr_hdlr)(int irq, void *dev_id);
197
198 u32 odigest_ofs;
199 u32 idigest_ofs;
200 u32 din_ofs;
201 u32 digcnt_ofs;
202 u32 rev_ofs;
203 u32 mask_ofs;
204 u32 sysstatus_ofs;
205 u32 mode_ofs;
206 u32 length_ofs;
207
208 u32 major_mask;
209 u32 major_shift;
210 u32 minor_mask;
211 u32 minor_shift;
212 };
213
214 struct omap_sham_dev {
215 struct list_head list;
216 unsigned long phys_base;
217 struct device *dev;
218 void __iomem *io_base;
219 int irq;
220 spinlock_t lock;
221 int err;
222 unsigned int dma;
223 struct dma_chan *dma_lch;
224 struct tasklet_struct done_task;
225 u8 polling_mode;
226
227 unsigned long flags;
228 struct crypto_queue queue;
229 struct ahash_request *req;
230
231 const struct omap_sham_pdata *pdata;
232 };
233
234 struct omap_sham_drv {
235 struct list_head dev_list;
236 spinlock_t lock;
237 unsigned long flags;
238 };
239
240 static struct omap_sham_drv sham = {
241 .dev_list = LIST_HEAD_INIT(sham.dev_list),
242 .lock = __SPIN_LOCK_UNLOCKED(sham.lock),
243 };
244
245 static inline u32 omap_sham_read(struct omap_sham_dev *dd, u32 offset)
246 {
247 return __raw_readl(dd->io_base + offset);
248 }
249
250 static inline void omap_sham_write(struct omap_sham_dev *dd,
251 u32 offset, u32 value)
252 {
253 __raw_writel(value, dd->io_base + offset);
254 }
255
256 static inline void omap_sham_write_mask(struct omap_sham_dev *dd, u32 address,
257 u32 value, u32 mask)
258 {
259 u32 val;
260
261 val = omap_sham_read(dd, address);
262 val &= ~mask;
263 val |= value;
264 omap_sham_write(dd, address, val);
265 }
266
267 static inline int omap_sham_wait(struct omap_sham_dev *dd, u32 offset, u32 bit)
268 {
269 unsigned long timeout = jiffies + DEFAULT_TIMEOUT_INTERVAL;
270
271 while (!(omap_sham_read(dd, offset) & bit)) {
272 if (time_is_before_jiffies(timeout))
273 return -ETIMEDOUT;
274 }
275
276 return 0;
277 }
278
279 static void omap_sham_copy_hash_omap2(struct ahash_request *req, int out)
280 {
281 struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
282 struct omap_sham_dev *dd = ctx->dd;
283 u32 *hash = (u32 *)ctx->digest;
284 int i;
285
286 for (i = 0; i < dd->pdata->digest_size / sizeof(u32); i++) {
287 if (out)
288 hash[i] = omap_sham_read(dd, SHA_REG_IDIGEST(dd, i));
289 else
290 omap_sham_write(dd, SHA_REG_IDIGEST(dd, i), hash[i]);
291 }
292 }
293
294 static void omap_sham_copy_hash_omap4(struct ahash_request *req, int out)
295 {
296 struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
297 struct omap_sham_dev *dd = ctx->dd;
298 int i;
299
300 if (ctx->flags & BIT(FLAGS_HMAC)) {
301 struct crypto_ahash *tfm = crypto_ahash_reqtfm(dd->req);
302 struct omap_sham_ctx *tctx = crypto_ahash_ctx(tfm);
303 struct omap_sham_hmac_ctx *bctx = tctx->base;
304 u32 *opad = (u32 *)bctx->opad;
305
306 for (i = 0; i < dd->pdata->digest_size / sizeof(u32); i++) {
307 if (out)
308 opad[i] = omap_sham_read(dd,
309 SHA_REG_ODIGEST(dd, i));
310 else
311 omap_sham_write(dd, SHA_REG_ODIGEST(dd, i),
312 opad[i]);
313 }
314 }
315
316 omap_sham_copy_hash_omap2(req, out);
317 }
318
319 static void omap_sham_copy_ready_hash(struct ahash_request *req)
320 {
321 struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
322 u32 *in = (u32 *)ctx->digest;
323 u32 *hash = (u32 *)req->result;
324 int i, d, big_endian = 0;
325
326 if (!hash)
327 return;
328
329 switch (ctx->flags & FLAGS_MODE_MASK) {
330 case FLAGS_MODE_MD5:
331 d = MD5_DIGEST_SIZE / sizeof(u32);
332 break;
333 case FLAGS_MODE_SHA1:
334 /* OMAP2 SHA1 is big endian */
335 if (test_bit(FLAGS_BE32_SHA1, &ctx->dd->flags))
336 big_endian = 1;
337 d = SHA1_DIGEST_SIZE / sizeof(u32);
338 break;
339 case FLAGS_MODE_SHA224:
340 d = SHA224_DIGEST_SIZE / sizeof(u32);
341 break;
342 case FLAGS_MODE_SHA256:
343 d = SHA256_DIGEST_SIZE / sizeof(u32);
344 break;
345 case FLAGS_MODE_SHA384:
346 d = SHA384_DIGEST_SIZE / sizeof(u32);
347 break;
348 case FLAGS_MODE_SHA512:
349 d = SHA512_DIGEST_SIZE / sizeof(u32);
350 break;
351 default:
352 d = 0;
353 }
354
355 if (big_endian)
356 for (i = 0; i < d; i++)
357 hash[i] = be32_to_cpu(in[i]);
358 else
359 for (i = 0; i < d; i++)
360 hash[i] = le32_to_cpu(in[i]);
361 }
362
363 static int omap_sham_hw_init(struct omap_sham_dev *dd)
364 {
365 pm_runtime_get_sync(dd->dev);
366
367 if (!test_bit(FLAGS_INIT, &dd->flags)) {
368 set_bit(FLAGS_INIT, &dd->flags);
369 dd->err = 0;
370 }
371
372 return 0;
373 }
374
375 static void omap_sham_write_ctrl_omap2(struct omap_sham_dev *dd, size_t length,
376 int final, int dma)
377 {
378 struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
379 u32 val = length << 5, mask;
380
381 if (likely(ctx->digcnt))
382 omap_sham_write(dd, SHA_REG_DIGCNT(dd), ctx->digcnt);
383
384 omap_sham_write_mask(dd, SHA_REG_MASK(dd),
385 SHA_REG_MASK_IT_EN | (dma ? SHA_REG_MASK_DMA_EN : 0),
386 SHA_REG_MASK_IT_EN | SHA_REG_MASK_DMA_EN);
387 /*
388 * Setting ALGO_CONST only for the first iteration
389 * and CLOSE_HASH only for the last one.
390 */
391 if ((ctx->flags & FLAGS_MODE_MASK) == FLAGS_MODE_SHA1)
392 val |= SHA_REG_CTRL_ALGO;
393 if (!ctx->digcnt)
394 val |= SHA_REG_CTRL_ALGO_CONST;
395 if (final)
396 val |= SHA_REG_CTRL_CLOSE_HASH;
397
398 mask = SHA_REG_CTRL_ALGO_CONST | SHA_REG_CTRL_CLOSE_HASH |
399 SHA_REG_CTRL_ALGO | SHA_REG_CTRL_LENGTH;
400
401 omap_sham_write_mask(dd, SHA_REG_CTRL, val, mask);
402 }
403
404 static void omap_sham_trigger_omap2(struct omap_sham_dev *dd, size_t length)
405 {
406 }
407
408 static int omap_sham_poll_irq_omap2(struct omap_sham_dev *dd)
409 {
410 return omap_sham_wait(dd, SHA_REG_CTRL, SHA_REG_CTRL_INPUT_READY);
411 }
412
413 static int get_block_size(struct omap_sham_reqctx *ctx)
414 {
415 int d;
416
417 switch (ctx->flags & FLAGS_MODE_MASK) {
418 case FLAGS_MODE_MD5:
419 case FLAGS_MODE_SHA1:
420 d = SHA1_BLOCK_SIZE;
421 break;
422 case FLAGS_MODE_SHA224:
423 case FLAGS_MODE_SHA256:
424 d = SHA256_BLOCK_SIZE;
425 break;
426 case FLAGS_MODE_SHA384:
427 case FLAGS_MODE_SHA512:
428 d = SHA512_BLOCK_SIZE;
429 break;
430 default:
431 d = 0;
432 }
433
434 return d;
435 }
436
437 static void omap_sham_write_n(struct omap_sham_dev *dd, u32 offset,
438 u32 *value, int count)
439 {
440 for (; count--; value++, offset += 4)
441 omap_sham_write(dd, offset, *value);
442 }
443
444 static void omap_sham_write_ctrl_omap4(struct omap_sham_dev *dd, size_t length,
445 int final, int dma)
446 {
447 struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
448 u32 val, mask;
449
450 /*
451 * Setting ALGO_CONST only for the first iteration and
452 * CLOSE_HASH only for the last one. Note that flags mode bits
453 * correspond to algorithm encoding in mode register.
454 */
455 val = (ctx->flags & FLAGS_MODE_MASK) >> (FLAGS_MODE_SHIFT);
456 if (!ctx->digcnt) {
457 struct crypto_ahash *tfm = crypto_ahash_reqtfm(dd->req);
458 struct omap_sham_ctx *tctx = crypto_ahash_ctx(tfm);
459 struct omap_sham_hmac_ctx *bctx = tctx->base;
460 int bs, nr_dr;
461
462 val |= SHA_REG_MODE_ALGO_CONSTANT;
463
464 if (ctx->flags & BIT(FLAGS_HMAC)) {
465 bs = get_block_size(ctx);
466 nr_dr = bs / (2 * sizeof(u32));
467 val |= SHA_REG_MODE_HMAC_KEY_PROC;
468 omap_sham_write_n(dd, SHA_REG_ODIGEST(dd, 0),
469 (u32 *)bctx->ipad, nr_dr);
470 omap_sham_write_n(dd, SHA_REG_IDIGEST(dd, 0),
471 (u32 *)bctx->ipad + nr_dr, nr_dr);
472 ctx->digcnt += bs;
473 }
474 }
475
476 if (final) {
477 val |= SHA_REG_MODE_CLOSE_HASH;
478
479 if (ctx->flags & BIT(FLAGS_HMAC))
480 val |= SHA_REG_MODE_HMAC_OUTER_HASH;
481 }
482
483 mask = SHA_REG_MODE_ALGO_CONSTANT | SHA_REG_MODE_CLOSE_HASH |
484 SHA_REG_MODE_ALGO_MASK | SHA_REG_MODE_HMAC_OUTER_HASH |
485 SHA_REG_MODE_HMAC_KEY_PROC;
486
487 dev_dbg(dd->dev, "ctrl: %08x, flags: %08lx\n", val, ctx->flags);
488 omap_sham_write_mask(dd, SHA_REG_MODE(dd), val, mask);
489 omap_sham_write(dd, SHA_REG_IRQENA, SHA_REG_IRQENA_OUTPUT_RDY);
490 omap_sham_write_mask(dd, SHA_REG_MASK(dd),
491 SHA_REG_MASK_IT_EN |
492 (dma ? SHA_REG_MASK_DMA_EN : 0),
493 SHA_REG_MASK_IT_EN | SHA_REG_MASK_DMA_EN);
494 }
495
496 static void omap_sham_trigger_omap4(struct omap_sham_dev *dd, size_t length)
497 {
498 omap_sham_write(dd, SHA_REG_LENGTH(dd), length);
499 }
500
501 static int omap_sham_poll_irq_omap4(struct omap_sham_dev *dd)
502 {
503 return omap_sham_wait(dd, SHA_REG_IRQSTATUS,
504 SHA_REG_IRQSTATUS_INPUT_RDY);
505 }
506
507 static int omap_sham_xmit_cpu(struct omap_sham_dev *dd, const u8 *buf,
508 size_t length, int final)
509 {
510 struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
511 int count, len32, bs32, offset = 0;
512 const u32 *buffer = (const u32 *)buf;
513
514 dev_dbg(dd->dev, "xmit_cpu: digcnt: %d, length: %d, final: %d\n",
515 ctx->digcnt, length, final);
516
517 dd->pdata->write_ctrl(dd, length, final, 0);
518 dd->pdata->trigger(dd, length);
519
520 /* should be non-zero before next lines to disable clocks later */
521 ctx->digcnt += length;
522
523 if (final)
524 set_bit(FLAGS_FINAL, &dd->flags); /* catch last interrupt */
525
526 set_bit(FLAGS_CPU, &dd->flags);
527
528 len32 = DIV_ROUND_UP(length, sizeof(u32));
529 bs32 = get_block_size(ctx) / sizeof(u32);
530
531 while (len32) {
532 if (dd->pdata->poll_irq(dd))
533 return -ETIMEDOUT;
534
535 for (count = 0; count < min(len32, bs32); count++, offset++)
536 omap_sham_write(dd, SHA_REG_DIN(dd, count),
537 buffer[offset]);
538 len32 -= min(len32, bs32);
539 }
540
541 return -EINPROGRESS;
542 }
543
544 static void omap_sham_dma_callback(void *param)
545 {
546 struct omap_sham_dev *dd = param;
547
548 set_bit(FLAGS_DMA_READY, &dd->flags);
549 tasklet_schedule(&dd->done_task);
550 }
551
552 static int omap_sham_xmit_dma(struct omap_sham_dev *dd, dma_addr_t dma_addr,
553 size_t length, int final, int is_sg)
554 {
555 struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
556 struct dma_async_tx_descriptor *tx;
557 struct dma_slave_config cfg;
558 int len32, ret, dma_min = get_block_size(ctx);
559
560 dev_dbg(dd->dev, "xmit_dma: digcnt: %d, length: %d, final: %d\n",
561 ctx->digcnt, length, final);
562
563 memset(&cfg, 0, sizeof(cfg));
564
565 cfg.dst_addr = dd->phys_base + SHA_REG_DIN(dd, 0);
566 cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
567 cfg.dst_maxburst = dma_min / DMA_SLAVE_BUSWIDTH_4_BYTES;
568
569 ret = dmaengine_slave_config(dd->dma_lch, &cfg);
570 if (ret) {
571 pr_err("omap-sham: can't configure dmaengine slave: %d\n", ret);
572 return ret;
573 }
574
575 len32 = DIV_ROUND_UP(length, dma_min) * dma_min;
576
577 if (is_sg) {
578 /*
579 * The SG entry passed in may not have the 'length' member
580 * set correctly so use a local SG entry (sgl) with the
581 * proper value for 'length' instead. If this is not done,
582 * the dmaengine may try to DMA the incorrect amount of data.
583 */
584 sg_init_table(&ctx->sgl, 1);
585 ctx->sgl.page_link = ctx->sg->page_link;
586 ctx->sgl.offset = ctx->sg->offset;
587 sg_dma_len(&ctx->sgl) = len32;
588 sg_dma_address(&ctx->sgl) = sg_dma_address(ctx->sg);
589
590 tx = dmaengine_prep_slave_sg(dd->dma_lch, &ctx->sgl, 1,
591 DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
592 } else {
593 tx = dmaengine_prep_slave_single(dd->dma_lch, dma_addr, len32,
594 DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
595 }
596
597 if (!tx) {
598 dev_err(dd->dev, "prep_slave_sg/single() failed\n");
599 return -EINVAL;
600 }
601
602 tx->callback = omap_sham_dma_callback;
603 tx->callback_param = dd;
604
605 dd->pdata->write_ctrl(dd, length, final, 1);
606
607 ctx->digcnt += length;
608
609 if (final)
610 set_bit(FLAGS_FINAL, &dd->flags); /* catch last interrupt */
611
612 set_bit(FLAGS_DMA_ACTIVE, &dd->flags);
613
614 dmaengine_submit(tx);
615 dma_async_issue_pending(dd->dma_lch);
616
617 dd->pdata->trigger(dd, length);
618
619 return -EINPROGRESS;
620 }
621
622 static size_t omap_sham_append_buffer(struct omap_sham_reqctx *ctx,
623 const u8 *data, size_t length)
624 {
625 size_t count = min(length, ctx->buflen - ctx->bufcnt);
626
627 count = min(count, ctx->total);
628 if (count <= 0)
629 return 0;
630 memcpy(ctx->buffer + ctx->bufcnt, data, count);
631 ctx->bufcnt += count;
632
633 return count;
634 }
635
636 static size_t omap_sham_append_sg(struct omap_sham_reqctx *ctx)
637 {
638 size_t count;
639
640 while (ctx->sg) {
641 count = omap_sham_append_buffer(ctx,
642 sg_virt(ctx->sg) + ctx->offset,
643 ctx->sg->length - ctx->offset);
644 if (!count)
645 break;
646 ctx->offset += count;
647 ctx->total -= count;
648 if (ctx->offset == ctx->sg->length) {
649 ctx->sg = sg_next(ctx->sg);
650 if (ctx->sg)
651 ctx->offset = 0;
652 else
653 ctx->total = 0;
654 }
655 }
656
657 return 0;
658 }
659
660 static int omap_sham_xmit_dma_map(struct omap_sham_dev *dd,
661 struct omap_sham_reqctx *ctx,
662 size_t length, int final)
663 {
664 int ret;
665
666 ctx->dma_addr = dma_map_single(dd->dev, ctx->buffer, ctx->buflen,
667 DMA_TO_DEVICE);
668 if (dma_mapping_error(dd->dev, ctx->dma_addr)) {
669 dev_err(dd->dev, "dma %u bytes error\n", ctx->buflen);
670 return -EINVAL;
671 }
672
673 ctx->flags &= ~BIT(FLAGS_SG);
674
675 ret = omap_sham_xmit_dma(dd, ctx->dma_addr, length, final, 0);
676 if (ret != -EINPROGRESS)
677 dma_unmap_single(dd->dev, ctx->dma_addr, ctx->buflen,
678 DMA_TO_DEVICE);
679
680 return ret;
681 }
682
683 static int omap_sham_update_dma_slow(struct omap_sham_dev *dd)
684 {
685 struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
686 unsigned int final;
687 size_t count;
688
689 omap_sham_append_sg(ctx);
690
691 final = (ctx->flags & BIT(FLAGS_FINUP)) && !ctx->total;
692
693 dev_dbg(dd->dev, "slow: bufcnt: %u, digcnt: %d, final: %d\n",
694 ctx->bufcnt, ctx->digcnt, final);
695
696 if (final || (ctx->bufcnt == ctx->buflen && ctx->total)) {
697 count = ctx->bufcnt;
698 ctx->bufcnt = 0;
699 return omap_sham_xmit_dma_map(dd, ctx, count, final);
700 }
701
702 return 0;
703 }
704
705 /* Start address alignment */
706 #define SG_AA(sg) (IS_ALIGNED(sg->offset, sizeof(u32)))
707 /* SHA1 block size alignment */
708 #define SG_SA(sg, bs) (IS_ALIGNED(sg->length, bs))
709
710 static int omap_sham_update_dma_start(struct omap_sham_dev *dd)
711 {
712 struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
713 unsigned int length, final, tail;
714 struct scatterlist *sg;
715 int ret, bs;
716
717 if (!ctx->total)
718 return 0;
719
720 if (ctx->bufcnt || ctx->offset)
721 return omap_sham_update_dma_slow(dd);
722
723 /*
724 * Don't use the sg interface when the transfer size is less
725 * than the number of elements in a DMA frame. Otherwise,
726 * the dmaengine infrastructure will calculate that it needs
727 * to transfer 0 frames which ultimately fails.
728 */
729 if (ctx->total < get_block_size(ctx))
730 return omap_sham_update_dma_slow(dd);
731
732 dev_dbg(dd->dev, "fast: digcnt: %d, bufcnt: %u, total: %u\n",
733 ctx->digcnt, ctx->bufcnt, ctx->total);
734
735 sg = ctx->sg;
736 bs = get_block_size(ctx);
737
738 if (!SG_AA(sg))
739 return omap_sham_update_dma_slow(dd);
740
741 if (!sg_is_last(sg) && !SG_SA(sg, bs))
742 /* size is not BLOCK_SIZE aligned */
743 return omap_sham_update_dma_slow(dd);
744
745 length = min(ctx->total, sg->length);
746
747 if (sg_is_last(sg)) {
748 if (!(ctx->flags & BIT(FLAGS_FINUP))) {
749 /* not last sg must be BLOCK_SIZE aligned */
750 tail = length & (bs - 1);
751 /* without finup() we need one block to close hash */
752 if (!tail)
753 tail = bs;
754 length -= tail;
755 }
756 }
757
758 if (!dma_map_sg(dd->dev, ctx->sg, 1, DMA_TO_DEVICE)) {
759 dev_err(dd->dev, "dma_map_sg error\n");
760 return -EINVAL;
761 }
762
763 ctx->flags |= BIT(FLAGS_SG);
764
765 ctx->total -= length;
766 ctx->offset = length; /* offset where to start slow */
767
768 final = (ctx->flags & BIT(FLAGS_FINUP)) && !ctx->total;
769
770 ret = omap_sham_xmit_dma(dd, sg_dma_address(ctx->sg), length, final, 1);
771 if (ret != -EINPROGRESS)
772 dma_unmap_sg(dd->dev, ctx->sg, 1, DMA_TO_DEVICE);
773
774 return ret;
775 }
776
777 static int omap_sham_update_cpu(struct omap_sham_dev *dd)
778 {
779 struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
780 int bufcnt, final;
781
782 if (!ctx->total)
783 return 0;
784
785 omap_sham_append_sg(ctx);
786
787 final = (ctx->flags & BIT(FLAGS_FINUP)) && !ctx->total;
788
789 dev_dbg(dd->dev, "cpu: bufcnt: %u, digcnt: %d, final: %d\n",
790 ctx->bufcnt, ctx->digcnt, final);
791
792 bufcnt = ctx->bufcnt;
793 ctx->bufcnt = 0;
794
795 return omap_sham_xmit_cpu(dd, ctx->buffer, bufcnt, final);
796 }
797
798 static int omap_sham_update_dma_stop(struct omap_sham_dev *dd)
799 {
800 struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
801
802 dmaengine_terminate_all(dd->dma_lch);
803
804 if (ctx->flags & BIT(FLAGS_SG)) {
805 dma_unmap_sg(dd->dev, ctx->sg, 1, DMA_TO_DEVICE);
806 if (ctx->sg->length == ctx->offset) {
807 ctx->sg = sg_next(ctx->sg);
808 if (ctx->sg)
809 ctx->offset = 0;
810 }
811 } else {
812 dma_unmap_single(dd->dev, ctx->dma_addr, ctx->buflen,
813 DMA_TO_DEVICE);
814 }
815
816 return 0;
817 }
818
819 static int omap_sham_init(struct ahash_request *req)
820 {
821 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
822 struct omap_sham_ctx *tctx = crypto_ahash_ctx(tfm);
823 struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
824 struct omap_sham_dev *dd = NULL, *tmp;
825 int bs = 0;
826
827 spin_lock_bh(&sham.lock);
828 if (!tctx->dd) {
829 list_for_each_entry(tmp, &sham.dev_list, list) {
830 dd = tmp;
831 break;
832 }
833 tctx->dd = dd;
834 } else {
835 dd = tctx->dd;
836 }
837 spin_unlock_bh(&sham.lock);
838
839 ctx->dd = dd;
840
841 ctx->flags = 0;
842
843 dev_dbg(dd->dev, "init: digest size: %d\n",
844 crypto_ahash_digestsize(tfm));
845
846 switch (crypto_ahash_digestsize(tfm)) {
847 case MD5_DIGEST_SIZE:
848 ctx->flags |= FLAGS_MODE_MD5;
849 bs = SHA1_BLOCK_SIZE;
850 break;
851 case SHA1_DIGEST_SIZE:
852 ctx->flags |= FLAGS_MODE_SHA1;
853 bs = SHA1_BLOCK_SIZE;
854 break;
855 case SHA224_DIGEST_SIZE:
856 ctx->flags |= FLAGS_MODE_SHA224;
857 bs = SHA224_BLOCK_SIZE;
858 break;
859 case SHA256_DIGEST_SIZE:
860 ctx->flags |= FLAGS_MODE_SHA256;
861 bs = SHA256_BLOCK_SIZE;
862 break;
863 case SHA384_DIGEST_SIZE:
864 ctx->flags |= FLAGS_MODE_SHA384;
865 bs = SHA384_BLOCK_SIZE;
866 break;
867 case SHA512_DIGEST_SIZE:
868 ctx->flags |= FLAGS_MODE_SHA512;
869 bs = SHA512_BLOCK_SIZE;
870 break;
871 }
872
873 ctx->bufcnt = 0;
874 ctx->digcnt = 0;
875 ctx->buflen = BUFLEN;
876
877 if (tctx->flags & BIT(FLAGS_HMAC)) {
878 if (!test_bit(FLAGS_AUTO_XOR, &dd->flags)) {
879 struct omap_sham_hmac_ctx *bctx = tctx->base;
880
881 memcpy(ctx->buffer, bctx->ipad, bs);
882 ctx->bufcnt = bs;
883 }
884
885 ctx->flags |= BIT(FLAGS_HMAC);
886 }
887
888 return 0;
889
890 }
891
892 static int omap_sham_update_req(struct omap_sham_dev *dd)
893 {
894 struct ahash_request *req = dd->req;
895 struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
896 int err;
897
898 dev_dbg(dd->dev, "update_req: total: %u, digcnt: %d, finup: %d\n",
899 ctx->total, ctx->digcnt, (ctx->flags & BIT(FLAGS_FINUP)) != 0);
900
901 if (ctx->flags & BIT(FLAGS_CPU))
902 err = omap_sham_update_cpu(dd);
903 else
904 err = omap_sham_update_dma_start(dd);
905
906 /* wait for dma completion before can take more data */
907 dev_dbg(dd->dev, "update: err: %d, digcnt: %d\n", err, ctx->digcnt);
908
909 return err;
910 }
911
912 static int omap_sham_final_req(struct omap_sham_dev *dd)
913 {
914 struct ahash_request *req = dd->req;
915 struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
916 int err = 0, use_dma = 1;
917
918 if ((ctx->bufcnt <= get_block_size(ctx)) || dd->polling_mode)
919 /*
920 * faster to handle last block with cpu or
921 * use cpu when dma is not present.
922 */
923 use_dma = 0;
924
925 if (use_dma)
926 err = omap_sham_xmit_dma_map(dd, ctx, ctx->bufcnt, 1);
927 else
928 err = omap_sham_xmit_cpu(dd, ctx->buffer, ctx->bufcnt, 1);
929
930 ctx->bufcnt = 0;
931
932 dev_dbg(dd->dev, "final_req: err: %d\n", err);
933
934 return err;
935 }
936
937 static int omap_sham_finish_hmac(struct ahash_request *req)
938 {
939 struct omap_sham_ctx *tctx = crypto_tfm_ctx(req->base.tfm);
940 struct omap_sham_hmac_ctx *bctx = tctx->base;
941 int bs = crypto_shash_blocksize(bctx->shash);
942 int ds = crypto_shash_digestsize(bctx->shash);
943 struct {
944 struct shash_desc shash;
945 char ctx[crypto_shash_descsize(bctx->shash)];
946 } desc;
947
948 desc.shash.tfm = bctx->shash;
949 desc.shash.flags = 0; /* not CRYPTO_TFM_REQ_MAY_SLEEP */
950
951 return crypto_shash_init(&desc.shash) ?:
952 crypto_shash_update(&desc.shash, bctx->opad, bs) ?:
953 crypto_shash_finup(&desc.shash, req->result, ds, req->result);
954 }
955
956 static int omap_sham_finish(struct ahash_request *req)
957 {
958 struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
959 struct omap_sham_dev *dd = ctx->dd;
960 int err = 0;
961
962 if (ctx->digcnt) {
963 omap_sham_copy_ready_hash(req);
964 if ((ctx->flags & BIT(FLAGS_HMAC)) &&
965 !test_bit(FLAGS_AUTO_XOR, &dd->flags))
966 err = omap_sham_finish_hmac(req);
967 }
968
969 dev_dbg(dd->dev, "digcnt: %d, bufcnt: %d\n", ctx->digcnt, ctx->bufcnt);
970
971 return err;
972 }
973
974 static void omap_sham_finish_req(struct ahash_request *req, int err)
975 {
976 struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
977 struct omap_sham_dev *dd = ctx->dd;
978
979 if (!err) {
980 dd->pdata->copy_hash(req, 1);
981 if (test_bit(FLAGS_FINAL, &dd->flags))
982 err = omap_sham_finish(req);
983 } else {
984 ctx->flags |= BIT(FLAGS_ERROR);
985 }
986
987 /* atomic operation is not needed here */
988 dd->flags &= ~(BIT(FLAGS_BUSY) | BIT(FLAGS_FINAL) | BIT(FLAGS_CPU) |
989 BIT(FLAGS_DMA_READY) | BIT(FLAGS_OUTPUT_READY));
990
991 pm_runtime_put(dd->dev);
992
993 if (req->base.complete)
994 req->base.complete(&req->base, err);
995
996 /* handle new request */
997 tasklet_schedule(&dd->done_task);
998 }
999
1000 static int omap_sham_handle_queue(struct omap_sham_dev *dd,
1001 struct ahash_request *req)
1002 {
1003 struct crypto_async_request *async_req, *backlog;
1004 struct omap_sham_reqctx *ctx;
1005 unsigned long flags;
1006 int err = 0, ret = 0;
1007
1008 spin_lock_irqsave(&dd->lock, flags);
1009 if (req)
1010 ret = ahash_enqueue_request(&dd->queue, req);
1011 if (test_bit(FLAGS_BUSY, &dd->flags)) {
1012 spin_unlock_irqrestore(&dd->lock, flags);
1013 return ret;
1014 }
1015 backlog = crypto_get_backlog(&dd->queue);
1016 async_req = crypto_dequeue_request(&dd->queue);
1017 if (async_req)
1018 set_bit(FLAGS_BUSY, &dd->flags);
1019 spin_unlock_irqrestore(&dd->lock, flags);
1020
1021 if (!async_req)
1022 return ret;
1023
1024 if (backlog)
1025 backlog->complete(backlog, -EINPROGRESS);
1026
1027 req = ahash_request_cast(async_req);
1028 dd->req = req;
1029 ctx = ahash_request_ctx(req);
1030
1031 dev_dbg(dd->dev, "handling new req, op: %lu, nbytes: %d\n",
1032 ctx->op, req->nbytes);
1033
1034 err = omap_sham_hw_init(dd);
1035 if (err)
1036 goto err1;
1037
1038 if (ctx->digcnt)
1039 /* request has changed - restore hash */
1040 dd->pdata->copy_hash(req, 0);
1041
1042 if (ctx->op == OP_UPDATE) {
1043 err = omap_sham_update_req(dd);
1044 if (err != -EINPROGRESS && (ctx->flags & BIT(FLAGS_FINUP)))
1045 /* no final() after finup() */
1046 err = omap_sham_final_req(dd);
1047 } else if (ctx->op == OP_FINAL) {
1048 err = omap_sham_final_req(dd);
1049 }
1050 err1:
1051 if (err != -EINPROGRESS)
1052 /* done_task will not finish it, so do it here */
1053 omap_sham_finish_req(req, err);
1054
1055 dev_dbg(dd->dev, "exit, err: %d\n", err);
1056
1057 return ret;
1058 }
1059
1060 static int omap_sham_enqueue(struct ahash_request *req, unsigned int op)
1061 {
1062 struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
1063 struct omap_sham_ctx *tctx = crypto_tfm_ctx(req->base.tfm);
1064 struct omap_sham_dev *dd = tctx->dd;
1065
1066 ctx->op = op;
1067
1068 return omap_sham_handle_queue(dd, req);
1069 }
1070
1071 static int omap_sham_update(struct ahash_request *req)
1072 {
1073 struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
1074 struct omap_sham_dev *dd = ctx->dd;
1075 int bs = get_block_size(ctx);
1076
1077 if (!req->nbytes)
1078 return 0;
1079
1080 ctx->total = req->nbytes;
1081 ctx->sg = req->src;
1082 ctx->offset = 0;
1083
1084 if (ctx->flags & BIT(FLAGS_FINUP)) {
1085 if ((ctx->digcnt + ctx->bufcnt + ctx->total) < 9) {
1086 /*
1087 * OMAP HW accel works only with buffers >= 9
1088 * will switch to bypass in final()
1089 * final has the same request and data
1090 */
1091 omap_sham_append_sg(ctx);
1092 return 0;
1093 } else if ((ctx->bufcnt + ctx->total <= bs) ||
1094 dd->polling_mode) {
1095 /*
1096 * faster to use CPU for short transfers or
1097 * use cpu when dma is not present.
1098 */
1099 ctx->flags |= BIT(FLAGS_CPU);
1100 }
1101 } else if (ctx->bufcnt + ctx->total < ctx->buflen) {
1102 omap_sham_append_sg(ctx);
1103 return 0;
1104 }
1105
1106 return omap_sham_enqueue(req, OP_UPDATE);
1107 }
1108
1109 static int omap_sham_shash_digest(struct crypto_shash *shash, u32 flags,
1110 const u8 *data, unsigned int len, u8 *out)
1111 {
1112 struct {
1113 struct shash_desc shash;
1114 char ctx[crypto_shash_descsize(shash)];
1115 } desc;
1116
1117 desc.shash.tfm = shash;
1118 desc.shash.flags = flags & CRYPTO_TFM_REQ_MAY_SLEEP;
1119
1120 return crypto_shash_digest(&desc.shash, data, len, out);
1121 }
1122
1123 static int omap_sham_final_shash(struct ahash_request *req)
1124 {
1125 struct omap_sham_ctx *tctx = crypto_tfm_ctx(req->base.tfm);
1126 struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
1127
1128 return omap_sham_shash_digest(tctx->fallback, req->base.flags,
1129 ctx->buffer, ctx->bufcnt, req->result);
1130 }
1131
1132 static int omap_sham_final(struct ahash_request *req)
1133 {
1134 struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
1135
1136 ctx->flags |= BIT(FLAGS_FINUP);
1137
1138 if (ctx->flags & BIT(FLAGS_ERROR))
1139 return 0; /* uncompleted hash is not needed */
1140
1141 /* OMAP HW accel works only with buffers >= 9 */
1142 /* HMAC is always >= 9 because ipad == block size */
1143 if ((ctx->digcnt + ctx->bufcnt) < 9)
1144 return omap_sham_final_shash(req);
1145 else if (ctx->bufcnt)
1146 return omap_sham_enqueue(req, OP_FINAL);
1147
1148 /* copy ready hash (+ finalize hmac) */
1149 return omap_sham_finish(req);
1150 }
1151
1152 static int omap_sham_finup(struct ahash_request *req)
1153 {
1154 struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
1155 int err1, err2;
1156
1157 ctx->flags |= BIT(FLAGS_FINUP);
1158
1159 err1 = omap_sham_update(req);
1160 if (err1 == -EINPROGRESS || err1 == -EBUSY)
1161 return err1;
1162 /*
1163 * final() has to be always called to cleanup resources
1164 * even if udpate() failed, except EINPROGRESS
1165 */
1166 err2 = omap_sham_final(req);
1167
1168 return err1 ?: err2;
1169 }
1170
1171 static int omap_sham_digest(struct ahash_request *req)
1172 {
1173 return omap_sham_init(req) ?: omap_sham_finup(req);
1174 }
1175
1176 static int omap_sham_setkey(struct crypto_ahash *tfm, const u8 *key,
1177 unsigned int keylen)
1178 {
1179 struct omap_sham_ctx *tctx = crypto_ahash_ctx(tfm);
1180 struct omap_sham_hmac_ctx *bctx = tctx->base;
1181 int bs = crypto_shash_blocksize(bctx->shash);
1182 int ds = crypto_shash_digestsize(bctx->shash);
1183 struct omap_sham_dev *dd = NULL, *tmp;
1184 int err, i;
1185
1186 spin_lock_bh(&sham.lock);
1187 if (!tctx->dd) {
1188 list_for_each_entry(tmp, &sham.dev_list, list) {
1189 dd = tmp;
1190 break;
1191 }
1192 tctx->dd = dd;
1193 } else {
1194 dd = tctx->dd;
1195 }
1196 spin_unlock_bh(&sham.lock);
1197
1198 err = crypto_shash_setkey(tctx->fallback, key, keylen);
1199 if (err)
1200 return err;
1201
1202 if (keylen > bs) {
1203 err = omap_sham_shash_digest(bctx->shash,
1204 crypto_shash_get_flags(bctx->shash),
1205 key, keylen, bctx->ipad);
1206 if (err)
1207 return err;
1208 keylen = ds;
1209 } else {
1210 memcpy(bctx->ipad, key, keylen);
1211 }
1212
1213 memset(bctx->ipad + keylen, 0, bs - keylen);
1214
1215 if (!test_bit(FLAGS_AUTO_XOR, &dd->flags)) {
1216 memcpy(bctx->opad, bctx->ipad, bs);
1217
1218 for (i = 0; i < bs; i++) {
1219 bctx->ipad[i] ^= 0x36;
1220 bctx->opad[i] ^= 0x5c;
1221 }
1222 }
1223
1224 return err;
1225 }
1226
1227 static int omap_sham_cra_init_alg(struct crypto_tfm *tfm, const char *alg_base)
1228 {
1229 struct omap_sham_ctx *tctx = crypto_tfm_ctx(tfm);
1230 const char *alg_name = crypto_tfm_alg_name(tfm);
1231
1232 /* Allocate a fallback and abort if it failed. */
1233 tctx->fallback = crypto_alloc_shash(alg_name, 0,
1234 CRYPTO_ALG_NEED_FALLBACK);
1235 if (IS_ERR(tctx->fallback)) {
1236 pr_err("omap-sham: fallback driver '%s' "
1237 "could not be loaded.\n", alg_name);
1238 return PTR_ERR(tctx->fallback);
1239 }
1240
1241 crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
1242 sizeof(struct omap_sham_reqctx) + BUFLEN);
1243
1244 if (alg_base) {
1245 struct omap_sham_hmac_ctx *bctx = tctx->base;
1246 tctx->flags |= BIT(FLAGS_HMAC);
1247 bctx->shash = crypto_alloc_shash(alg_base, 0,
1248 CRYPTO_ALG_NEED_FALLBACK);
1249 if (IS_ERR(bctx->shash)) {
1250 pr_err("omap-sham: base driver '%s' "
1251 "could not be loaded.\n", alg_base);
1252 crypto_free_shash(tctx->fallback);
1253 return PTR_ERR(bctx->shash);
1254 }
1255
1256 }
1257
1258 return 0;
1259 }
1260
1261 static int omap_sham_cra_init(struct crypto_tfm *tfm)
1262 {
1263 return omap_sham_cra_init_alg(tfm, NULL);
1264 }
1265
1266 static int omap_sham_cra_sha1_init(struct crypto_tfm *tfm)
1267 {
1268 return omap_sham_cra_init_alg(tfm, "sha1");
1269 }
1270
1271 static int omap_sham_cra_sha224_init(struct crypto_tfm *tfm)
1272 {
1273 return omap_sham_cra_init_alg(tfm, "sha224");
1274 }
1275
1276 static int omap_sham_cra_sha256_init(struct crypto_tfm *tfm)
1277 {
1278 return omap_sham_cra_init_alg(tfm, "sha256");
1279 }
1280
1281 static int omap_sham_cra_md5_init(struct crypto_tfm *tfm)
1282 {
1283 return omap_sham_cra_init_alg(tfm, "md5");
1284 }
1285
1286 static int omap_sham_cra_sha384_init(struct crypto_tfm *tfm)
1287 {
1288 return omap_sham_cra_init_alg(tfm, "sha384");
1289 }
1290
1291 static int omap_sham_cra_sha512_init(struct crypto_tfm *tfm)
1292 {
1293 return omap_sham_cra_init_alg(tfm, "sha512");
1294 }
1295
1296 static void omap_sham_cra_exit(struct crypto_tfm *tfm)
1297 {
1298 struct omap_sham_ctx *tctx = crypto_tfm_ctx(tfm);
1299
1300 crypto_free_shash(tctx->fallback);
1301 tctx->fallback = NULL;
1302
1303 if (tctx->flags & BIT(FLAGS_HMAC)) {
1304 struct omap_sham_hmac_ctx *bctx = tctx->base;
1305 crypto_free_shash(bctx->shash);
1306 }
1307 }
1308
1309 static struct ahash_alg algs_sha1_md5[] = {
1310 {
1311 .init = omap_sham_init,
1312 .update = omap_sham_update,
1313 .final = omap_sham_final,
1314 .finup = omap_sham_finup,
1315 .digest = omap_sham_digest,
1316 .halg.digestsize = SHA1_DIGEST_SIZE,
1317 .halg.base = {
1318 .cra_name = "sha1",
1319 .cra_driver_name = "omap-sha1",
1320 .cra_priority = 100,
1321 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
1322 CRYPTO_ALG_KERN_DRIVER_ONLY |
1323 CRYPTO_ALG_ASYNC |
1324 CRYPTO_ALG_NEED_FALLBACK,
1325 .cra_blocksize = SHA1_BLOCK_SIZE,
1326 .cra_ctxsize = sizeof(struct omap_sham_ctx),
1327 .cra_alignmask = 0,
1328 .cra_module = THIS_MODULE,
1329 .cra_init = omap_sham_cra_init,
1330 .cra_exit = omap_sham_cra_exit,
1331 }
1332 },
1333 {
1334 .init = omap_sham_init,
1335 .update = omap_sham_update,
1336 .final = omap_sham_final,
1337 .finup = omap_sham_finup,
1338 .digest = omap_sham_digest,
1339 .halg.digestsize = MD5_DIGEST_SIZE,
1340 .halg.base = {
1341 .cra_name = "md5",
1342 .cra_driver_name = "omap-md5",
1343 .cra_priority = 100,
1344 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
1345 CRYPTO_ALG_KERN_DRIVER_ONLY |
1346 CRYPTO_ALG_ASYNC |
1347 CRYPTO_ALG_NEED_FALLBACK,
1348 .cra_blocksize = SHA1_BLOCK_SIZE,
1349 .cra_ctxsize = sizeof(struct omap_sham_ctx),
1350 .cra_alignmask = OMAP_ALIGN_MASK,
1351 .cra_module = THIS_MODULE,
1352 .cra_init = omap_sham_cra_init,
1353 .cra_exit = omap_sham_cra_exit,
1354 }
1355 },
1356 {
1357 .init = omap_sham_init,
1358 .update = omap_sham_update,
1359 .final = omap_sham_final,
1360 .finup = omap_sham_finup,
1361 .digest = omap_sham_digest,
1362 .setkey = omap_sham_setkey,
1363 .halg.digestsize = SHA1_DIGEST_SIZE,
1364 .halg.base = {
1365 .cra_name = "hmac(sha1)",
1366 .cra_driver_name = "omap-hmac-sha1",
1367 .cra_priority = 100,
1368 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
1369 CRYPTO_ALG_KERN_DRIVER_ONLY |
1370 CRYPTO_ALG_ASYNC |
1371 CRYPTO_ALG_NEED_FALLBACK,
1372 .cra_blocksize = SHA1_BLOCK_SIZE,
1373 .cra_ctxsize = sizeof(struct omap_sham_ctx) +
1374 sizeof(struct omap_sham_hmac_ctx),
1375 .cra_alignmask = OMAP_ALIGN_MASK,
1376 .cra_module = THIS_MODULE,
1377 .cra_init = omap_sham_cra_sha1_init,
1378 .cra_exit = omap_sham_cra_exit,
1379 }
1380 },
1381 {
1382 .init = omap_sham_init,
1383 .update = omap_sham_update,
1384 .final = omap_sham_final,
1385 .finup = omap_sham_finup,
1386 .digest = omap_sham_digest,
1387 .setkey = omap_sham_setkey,
1388 .halg.digestsize = MD5_DIGEST_SIZE,
1389 .halg.base = {
1390 .cra_name = "hmac(md5)",
1391 .cra_driver_name = "omap-hmac-md5",
1392 .cra_priority = 100,
1393 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
1394 CRYPTO_ALG_KERN_DRIVER_ONLY |
1395 CRYPTO_ALG_ASYNC |
1396 CRYPTO_ALG_NEED_FALLBACK,
1397 .cra_blocksize = SHA1_BLOCK_SIZE,
1398 .cra_ctxsize = sizeof(struct omap_sham_ctx) +
1399 sizeof(struct omap_sham_hmac_ctx),
1400 .cra_alignmask = OMAP_ALIGN_MASK,
1401 .cra_module = THIS_MODULE,
1402 .cra_init = omap_sham_cra_md5_init,
1403 .cra_exit = omap_sham_cra_exit,
1404 }
1405 }
1406 };
1407
1408 /* OMAP4 has some algs in addition to what OMAP2 has */
1409 static struct ahash_alg algs_sha224_sha256[] = {
1410 {
1411 .init = omap_sham_init,
1412 .update = omap_sham_update,
1413 .final = omap_sham_final,
1414 .finup = omap_sham_finup,
1415 .digest = omap_sham_digest,
1416 .halg.digestsize = SHA224_DIGEST_SIZE,
1417 .halg.base = {
1418 .cra_name = "sha224",
1419 .cra_driver_name = "omap-sha224",
1420 .cra_priority = 100,
1421 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
1422 CRYPTO_ALG_ASYNC |
1423 CRYPTO_ALG_NEED_FALLBACK,
1424 .cra_blocksize = SHA224_BLOCK_SIZE,
1425 .cra_ctxsize = sizeof(struct omap_sham_ctx),
1426 .cra_alignmask = 0,
1427 .cra_module = THIS_MODULE,
1428 .cra_init = omap_sham_cra_init,
1429 .cra_exit = omap_sham_cra_exit,
1430 }
1431 },
1432 {
1433 .init = omap_sham_init,
1434 .update = omap_sham_update,
1435 .final = omap_sham_final,
1436 .finup = omap_sham_finup,
1437 .digest = omap_sham_digest,
1438 .halg.digestsize = SHA256_DIGEST_SIZE,
1439 .halg.base = {
1440 .cra_name = "sha256",
1441 .cra_driver_name = "omap-sha256",
1442 .cra_priority = 100,
1443 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
1444 CRYPTO_ALG_ASYNC |
1445 CRYPTO_ALG_NEED_FALLBACK,
1446 .cra_blocksize = SHA256_BLOCK_SIZE,
1447 .cra_ctxsize = sizeof(struct omap_sham_ctx),
1448 .cra_alignmask = 0,
1449 .cra_module = THIS_MODULE,
1450 .cra_init = omap_sham_cra_init,
1451 .cra_exit = omap_sham_cra_exit,
1452 }
1453 },
1454 {
1455 .init = omap_sham_init,
1456 .update = omap_sham_update,
1457 .final = omap_sham_final,
1458 .finup = omap_sham_finup,
1459 .digest = omap_sham_digest,
1460 .setkey = omap_sham_setkey,
1461 .halg.digestsize = SHA224_DIGEST_SIZE,
1462 .halg.base = {
1463 .cra_name = "hmac(sha224)",
1464 .cra_driver_name = "omap-hmac-sha224",
1465 .cra_priority = 100,
1466 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
1467 CRYPTO_ALG_ASYNC |
1468 CRYPTO_ALG_NEED_FALLBACK,
1469 .cra_blocksize = SHA224_BLOCK_SIZE,
1470 .cra_ctxsize = sizeof(struct omap_sham_ctx) +
1471 sizeof(struct omap_sham_hmac_ctx),
1472 .cra_alignmask = OMAP_ALIGN_MASK,
1473 .cra_module = THIS_MODULE,
1474 .cra_init = omap_sham_cra_sha224_init,
1475 .cra_exit = omap_sham_cra_exit,
1476 }
1477 },
1478 {
1479 .init = omap_sham_init,
1480 .update = omap_sham_update,
1481 .final = omap_sham_final,
1482 .finup = omap_sham_finup,
1483 .digest = omap_sham_digest,
1484 .setkey = omap_sham_setkey,
1485 .halg.digestsize = SHA256_DIGEST_SIZE,
1486 .halg.base = {
1487 .cra_name = "hmac(sha256)",
1488 .cra_driver_name = "omap-hmac-sha256",
1489 .cra_priority = 100,
1490 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
1491 CRYPTO_ALG_ASYNC |
1492 CRYPTO_ALG_NEED_FALLBACK,
1493 .cra_blocksize = SHA256_BLOCK_SIZE,
1494 .cra_ctxsize = sizeof(struct omap_sham_ctx) +
1495 sizeof(struct omap_sham_hmac_ctx),
1496 .cra_alignmask = OMAP_ALIGN_MASK,
1497 .cra_module = THIS_MODULE,
1498 .cra_init = omap_sham_cra_sha256_init,
1499 .cra_exit = omap_sham_cra_exit,
1500 }
1501 },
1502 };
1503
1504 static struct ahash_alg algs_sha384_sha512[] = {
1505 {
1506 .init = omap_sham_init,
1507 .update = omap_sham_update,
1508 .final = omap_sham_final,
1509 .finup = omap_sham_finup,
1510 .digest = omap_sham_digest,
1511 .halg.digestsize = SHA384_DIGEST_SIZE,
1512 .halg.base = {
1513 .cra_name = "sha384",
1514 .cra_driver_name = "omap-sha384",
1515 .cra_priority = 100,
1516 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
1517 CRYPTO_ALG_ASYNC |
1518 CRYPTO_ALG_NEED_FALLBACK,
1519 .cra_blocksize = SHA384_BLOCK_SIZE,
1520 .cra_ctxsize = sizeof(struct omap_sham_ctx),
1521 .cra_alignmask = 0,
1522 .cra_module = THIS_MODULE,
1523 .cra_init = omap_sham_cra_init,
1524 .cra_exit = omap_sham_cra_exit,
1525 }
1526 },
1527 {
1528 .init = omap_sham_init,
1529 .update = omap_sham_update,
1530 .final = omap_sham_final,
1531 .finup = omap_sham_finup,
1532 .digest = omap_sham_digest,
1533 .halg.digestsize = SHA512_DIGEST_SIZE,
1534 .halg.base = {
1535 .cra_name = "sha512",
1536 .cra_driver_name = "omap-sha512",
1537 .cra_priority = 100,
1538 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
1539 CRYPTO_ALG_ASYNC |
1540 CRYPTO_ALG_NEED_FALLBACK,
1541 .cra_blocksize = SHA512_BLOCK_SIZE,
1542 .cra_ctxsize = sizeof(struct omap_sham_ctx),
1543 .cra_alignmask = 0,
1544 .cra_module = THIS_MODULE,
1545 .cra_init = omap_sham_cra_init,
1546 .cra_exit = omap_sham_cra_exit,
1547 }
1548 },
1549 {
1550 .init = omap_sham_init,
1551 .update = omap_sham_update,
1552 .final = omap_sham_final,
1553 .finup = omap_sham_finup,
1554 .digest = omap_sham_digest,
1555 .setkey = omap_sham_setkey,
1556 .halg.digestsize = SHA384_DIGEST_SIZE,
1557 .halg.base = {
1558 .cra_name = "hmac(sha384)",
1559 .cra_driver_name = "omap-hmac-sha384",
1560 .cra_priority = 100,
1561 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
1562 CRYPTO_ALG_ASYNC |
1563 CRYPTO_ALG_NEED_FALLBACK,
1564 .cra_blocksize = SHA384_BLOCK_SIZE,
1565 .cra_ctxsize = sizeof(struct omap_sham_ctx) +
1566 sizeof(struct omap_sham_hmac_ctx),
1567 .cra_alignmask = OMAP_ALIGN_MASK,
1568 .cra_module = THIS_MODULE,
1569 .cra_init = omap_sham_cra_sha384_init,
1570 .cra_exit = omap_sham_cra_exit,
1571 }
1572 },
1573 {
1574 .init = omap_sham_init,
1575 .update = omap_sham_update,
1576 .final = omap_sham_final,
1577 .finup = omap_sham_finup,
1578 .digest = omap_sham_digest,
1579 .setkey = omap_sham_setkey,
1580 .halg.digestsize = SHA512_DIGEST_SIZE,
1581 .halg.base = {
1582 .cra_name = "hmac(sha512)",
1583 .cra_driver_name = "omap-hmac-sha512",
1584 .cra_priority = 100,
1585 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
1586 CRYPTO_ALG_ASYNC |
1587 CRYPTO_ALG_NEED_FALLBACK,
1588 .cra_blocksize = SHA512_BLOCK_SIZE,
1589 .cra_ctxsize = sizeof(struct omap_sham_ctx) +
1590 sizeof(struct omap_sham_hmac_ctx),
1591 .cra_alignmask = OMAP_ALIGN_MASK,
1592 .cra_module = THIS_MODULE,
1593 .cra_init = omap_sham_cra_sha512_init,
1594 .cra_exit = omap_sham_cra_exit,
1595 }
1596 },
1597 };
1598
1599 static void omap_sham_done_task(unsigned long data)
1600 {
1601 struct omap_sham_dev *dd = (struct omap_sham_dev *)data;
1602 int err = 0;
1603
1604 if (!test_bit(FLAGS_BUSY, &dd->flags)) {
1605 omap_sham_handle_queue(dd, NULL);
1606 return;
1607 }
1608
1609 if (test_bit(FLAGS_CPU, &dd->flags)) {
1610 if (test_and_clear_bit(FLAGS_OUTPUT_READY, &dd->flags)) {
1611 /* hash or semi-hash ready */
1612 err = omap_sham_update_cpu(dd);
1613 if (err != -EINPROGRESS)
1614 goto finish;
1615 }
1616 } else if (test_bit(FLAGS_DMA_READY, &dd->flags)) {
1617 if (test_and_clear_bit(FLAGS_DMA_ACTIVE, &dd->flags)) {
1618 omap_sham_update_dma_stop(dd);
1619 if (dd->err) {
1620 err = dd->err;
1621 goto finish;
1622 }
1623 }
1624 if (test_and_clear_bit(FLAGS_OUTPUT_READY, &dd->flags)) {
1625 /* hash or semi-hash ready */
1626 clear_bit(FLAGS_DMA_READY, &dd->flags);
1627 err = omap_sham_update_dma_start(dd);
1628 if (err != -EINPROGRESS)
1629 goto finish;
1630 }
1631 }
1632
1633 return;
1634
1635 finish:
1636 dev_dbg(dd->dev, "update done: err: %d\n", err);
1637 /* finish curent request */
1638 omap_sham_finish_req(dd->req, err);
1639 }
1640
1641 static irqreturn_t omap_sham_irq_common(struct omap_sham_dev *dd)
1642 {
1643 if (!test_bit(FLAGS_BUSY, &dd->flags)) {
1644 dev_warn(dd->dev, "Interrupt when no active requests.\n");
1645 } else {
1646 set_bit(FLAGS_OUTPUT_READY, &dd->flags);
1647 tasklet_schedule(&dd->done_task);
1648 }
1649
1650 return IRQ_HANDLED;
1651 }
1652
1653 static irqreturn_t omap_sham_irq_omap2(int irq, void *dev_id)
1654 {
1655 struct omap_sham_dev *dd = dev_id;
1656
1657 if (unlikely(test_bit(FLAGS_FINAL, &dd->flags)))
1658 /* final -> allow device to go to power-saving mode */
1659 omap_sham_write_mask(dd, SHA_REG_CTRL, 0, SHA_REG_CTRL_LENGTH);
1660
1661 omap_sham_write_mask(dd, SHA_REG_CTRL, SHA_REG_CTRL_OUTPUT_READY,
1662 SHA_REG_CTRL_OUTPUT_READY);
1663 omap_sham_read(dd, SHA_REG_CTRL);
1664
1665 return omap_sham_irq_common(dd);
1666 }
1667
1668 static irqreturn_t omap_sham_irq_omap4(int irq, void *dev_id)
1669 {
1670 struct omap_sham_dev *dd = dev_id;
1671
1672 omap_sham_write_mask(dd, SHA_REG_MASK(dd), 0, SHA_REG_MASK_IT_EN);
1673
1674 return omap_sham_irq_common(dd);
1675 }
1676
1677 static struct omap_sham_algs_info omap_sham_algs_info_omap2[] = {
1678 {
1679 .algs_list = algs_sha1_md5,
1680 .size = ARRAY_SIZE(algs_sha1_md5),
1681 },
1682 };
1683
1684 static const struct omap_sham_pdata omap_sham_pdata_omap2 = {
1685 .algs_info = omap_sham_algs_info_omap2,
1686 .algs_info_size = ARRAY_SIZE(omap_sham_algs_info_omap2),
1687 .flags = BIT(FLAGS_BE32_SHA1),
1688 .digest_size = SHA1_DIGEST_SIZE,
1689 .copy_hash = omap_sham_copy_hash_omap2,
1690 .write_ctrl = omap_sham_write_ctrl_omap2,
1691 .trigger = omap_sham_trigger_omap2,
1692 .poll_irq = omap_sham_poll_irq_omap2,
1693 .intr_hdlr = omap_sham_irq_omap2,
1694 .idigest_ofs = 0x00,
1695 .din_ofs = 0x1c,
1696 .digcnt_ofs = 0x14,
1697 .rev_ofs = 0x5c,
1698 .mask_ofs = 0x60,
1699 .sysstatus_ofs = 0x64,
1700 .major_mask = 0xf0,
1701 .major_shift = 4,
1702 .minor_mask = 0x0f,
1703 .minor_shift = 0,
1704 };
1705
1706 #ifdef CONFIG_OF
1707 static struct omap_sham_algs_info omap_sham_algs_info_omap4[] = {
1708 {
1709 .algs_list = algs_sha1_md5,
1710 .size = ARRAY_SIZE(algs_sha1_md5),
1711 },
1712 {
1713 .algs_list = algs_sha224_sha256,
1714 .size = ARRAY_SIZE(algs_sha224_sha256),
1715 },
1716 };
1717
1718 static const struct omap_sham_pdata omap_sham_pdata_omap4 = {
1719 .algs_info = omap_sham_algs_info_omap4,
1720 .algs_info_size = ARRAY_SIZE(omap_sham_algs_info_omap4),
1721 .flags = BIT(FLAGS_AUTO_XOR),
1722 .digest_size = SHA256_DIGEST_SIZE,
1723 .copy_hash = omap_sham_copy_hash_omap4,
1724 .write_ctrl = omap_sham_write_ctrl_omap4,
1725 .trigger = omap_sham_trigger_omap4,
1726 .poll_irq = omap_sham_poll_irq_omap4,
1727 .intr_hdlr = omap_sham_irq_omap4,
1728 .idigest_ofs = 0x020,
1729 .odigest_ofs = 0x0,
1730 .din_ofs = 0x080,
1731 .digcnt_ofs = 0x040,
1732 .rev_ofs = 0x100,
1733 .mask_ofs = 0x110,
1734 .sysstatus_ofs = 0x114,
1735 .mode_ofs = 0x44,
1736 .length_ofs = 0x48,
1737 .major_mask = 0x0700,
1738 .major_shift = 8,
1739 .minor_mask = 0x003f,
1740 .minor_shift = 0,
1741 };
1742
1743 static struct omap_sham_algs_info omap_sham_algs_info_omap5[] = {
1744 {
1745 .algs_list = algs_sha1_md5,
1746 .size = ARRAY_SIZE(algs_sha1_md5),
1747 },
1748 {
1749 .algs_list = algs_sha224_sha256,
1750 .size = ARRAY_SIZE(algs_sha224_sha256),
1751 },
1752 {
1753 .algs_list = algs_sha384_sha512,
1754 .size = ARRAY_SIZE(algs_sha384_sha512),
1755 },
1756 };
1757
1758 static const struct omap_sham_pdata omap_sham_pdata_omap5 = {
1759 .algs_info = omap_sham_algs_info_omap5,
1760 .algs_info_size = ARRAY_SIZE(omap_sham_algs_info_omap5),
1761 .flags = BIT(FLAGS_AUTO_XOR),
1762 .digest_size = SHA512_DIGEST_SIZE,
1763 .copy_hash = omap_sham_copy_hash_omap4,
1764 .write_ctrl = omap_sham_write_ctrl_omap4,
1765 .trigger = omap_sham_trigger_omap4,
1766 .poll_irq = omap_sham_poll_irq_omap4,
1767 .intr_hdlr = omap_sham_irq_omap4,
1768 .idigest_ofs = 0x240,
1769 .odigest_ofs = 0x200,
1770 .din_ofs = 0x080,
1771 .digcnt_ofs = 0x280,
1772 .rev_ofs = 0x100,
1773 .mask_ofs = 0x110,
1774 .sysstatus_ofs = 0x114,
1775 .mode_ofs = 0x284,
1776 .length_ofs = 0x288,
1777 .major_mask = 0x0700,
1778 .major_shift = 8,
1779 .minor_mask = 0x003f,
1780 .minor_shift = 0,
1781 };
1782
1783 static const struct of_device_id omap_sham_of_match[] = {
1784 {
1785 .compatible = "ti,omap2-sham",
1786 .data = &omap_sham_pdata_omap2,
1787 },
1788 {
1789 .compatible = "ti,omap4-sham",
1790 .data = &omap_sham_pdata_omap4,
1791 },
1792 {
1793 .compatible = "ti,omap5-sham",
1794 .data = &omap_sham_pdata_omap5,
1795 },
1796 {},
1797 };
1798 MODULE_DEVICE_TABLE(of, omap_sham_of_match);
1799
1800 static int omap_sham_get_res_of(struct omap_sham_dev *dd,
1801 struct device *dev, struct resource *res)
1802 {
1803 struct device_node *node = dev->of_node;
1804 const struct of_device_id *match;
1805 int err = 0;
1806
1807 match = of_match_device(of_match_ptr(omap_sham_of_match), dev);
1808 if (!match) {
1809 dev_err(dev, "no compatible OF match\n");
1810 err = -EINVAL;
1811 goto err;
1812 }
1813
1814 err = of_address_to_resource(node, 0, res);
1815 if (err < 0) {
1816 dev_err(dev, "can't translate OF node address\n");
1817 err = -EINVAL;
1818 goto err;
1819 }
1820
1821 dd->irq = of_irq_to_resource(node, 0, NULL);
1822 if (!dd->irq) {
1823 dev_err(dev, "can't translate OF irq value\n");
1824 err = -EINVAL;
1825 goto err;
1826 }
1827
1828 dd->dma = -1; /* Dummy value that's unused */
1829 dd->pdata = match->data;
1830
1831 err:
1832 return err;
1833 }
1834 #else
1835 static const struct of_device_id omap_sham_of_match[] = {
1836 {},
1837 };
1838
1839 static int omap_sham_get_res_of(struct omap_sham_dev *dd,
1840 struct device *dev, struct resource *res)
1841 {
1842 return -EINVAL;
1843 }
1844 #endif
1845
1846 static int omap_sham_get_res_pdev(struct omap_sham_dev *dd,
1847 struct platform_device *pdev, struct resource *res)
1848 {
1849 struct device *dev = &pdev->dev;
1850 struct resource *r;
1851 int err = 0;
1852
1853 /* Get the base address */
1854 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1855 if (!r) {
1856 dev_err(dev, "no MEM resource info\n");
1857 err = -ENODEV;
1858 goto err;
1859 }
1860 memcpy(res, r, sizeof(*res));
1861
1862 /* Get the IRQ */
1863 dd->irq = platform_get_irq(pdev, 0);
1864 if (dd->irq < 0) {
1865 dev_err(dev, "no IRQ resource info\n");
1866 err = dd->irq;
1867 goto err;
1868 }
1869
1870 /* Get the DMA */
1871 r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
1872 if (!r) {
1873 dev_err(dev, "no DMA resource info\n");
1874 err = -ENODEV;
1875 goto err;
1876 }
1877 dd->dma = r->start;
1878
1879 /* Only OMAP2/3 can be non-DT */
1880 dd->pdata = &omap_sham_pdata_omap2;
1881
1882 err:
1883 return err;
1884 }
1885
1886 static int omap_sham_probe(struct platform_device *pdev)
1887 {
1888 struct omap_sham_dev *dd;
1889 struct device *dev = &pdev->dev;
1890 struct resource res;
1891 dma_cap_mask_t mask;
1892 int err, i, j;
1893 u32 rev;
1894
1895 dd = devm_kzalloc(dev, sizeof(struct omap_sham_dev), GFP_KERNEL);
1896 if (dd == NULL) {
1897 dev_err(dev, "unable to alloc data struct.\n");
1898 err = -ENOMEM;
1899 goto data_err;
1900 }
1901 dd->dev = dev;
1902 platform_set_drvdata(pdev, dd);
1903
1904 INIT_LIST_HEAD(&dd->list);
1905 spin_lock_init(&dd->lock);
1906 tasklet_init(&dd->done_task, omap_sham_done_task, (unsigned long)dd);
1907 crypto_init_queue(&dd->queue, OMAP_SHAM_QUEUE_LENGTH);
1908
1909 err = (dev->of_node) ? omap_sham_get_res_of(dd, dev, &res) :
1910 omap_sham_get_res_pdev(dd, pdev, &res);
1911 if (err)
1912 goto data_err;
1913
1914 dd->io_base = devm_ioremap_resource(dev, &res);
1915 if (IS_ERR(dd->io_base)) {
1916 err = PTR_ERR(dd->io_base);
1917 goto data_err;
1918 }
1919 dd->phys_base = res.start;
1920
1921 err = devm_request_irq(dev, dd->irq, dd->pdata->intr_hdlr,
1922 IRQF_TRIGGER_NONE, dev_name(dev), dd);
1923 if (err) {
1924 dev_err(dev, "unable to request irq %d, err = %d\n",
1925 dd->irq, err);
1926 goto data_err;
1927 }
1928
1929 dma_cap_zero(mask);
1930 dma_cap_set(DMA_SLAVE, mask);
1931
1932 dd->dma_lch = dma_request_slave_channel_compat(mask, omap_dma_filter_fn,
1933 &dd->dma, dev, "rx");
1934 if (!dd->dma_lch) {
1935 dd->polling_mode = 1;
1936 dev_dbg(dev, "using polling mode instead of dma\n");
1937 }
1938
1939 dd->flags |= dd->pdata->flags;
1940
1941 pm_runtime_enable(dev);
1942 pm_runtime_get_sync(dev);
1943 rev = omap_sham_read(dd, SHA_REG_REV(dd));
1944 pm_runtime_put_sync(&pdev->dev);
1945
1946 dev_info(dev, "hw accel on OMAP rev %u.%u\n",
1947 (rev & dd->pdata->major_mask) >> dd->pdata->major_shift,
1948 (rev & dd->pdata->minor_mask) >> dd->pdata->minor_shift);
1949
1950 spin_lock(&sham.lock);
1951 list_add_tail(&dd->list, &sham.dev_list);
1952 spin_unlock(&sham.lock);
1953
1954 for (i = 0; i < dd->pdata->algs_info_size; i++) {
1955 for (j = 0; j < dd->pdata->algs_info[i].size; j++) {
1956 err = crypto_register_ahash(
1957 &dd->pdata->algs_info[i].algs_list[j]);
1958 if (err)
1959 goto err_algs;
1960
1961 dd->pdata->algs_info[i].registered++;
1962 }
1963 }
1964
1965 return 0;
1966
1967 err_algs:
1968 for (i = dd->pdata->algs_info_size - 1; i >= 0; i--)
1969 for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--)
1970 crypto_unregister_ahash(
1971 &dd->pdata->algs_info[i].algs_list[j]);
1972 pm_runtime_disable(dev);
1973 dma_release_channel(dd->dma_lch);
1974 data_err:
1975 dev_err(dev, "initialization failed.\n");
1976
1977 return err;
1978 }
1979
1980 static int omap_sham_remove(struct platform_device *pdev)
1981 {
1982 static struct omap_sham_dev *dd;
1983 int i, j;
1984
1985 dd = platform_get_drvdata(pdev);
1986 if (!dd)
1987 return -ENODEV;
1988 spin_lock(&sham.lock);
1989 list_del(&dd->list);
1990 spin_unlock(&sham.lock);
1991 for (i = dd->pdata->algs_info_size - 1; i >= 0; i--)
1992 for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--)
1993 crypto_unregister_ahash(
1994 &dd->pdata->algs_info[i].algs_list[j]);
1995 tasklet_kill(&dd->done_task);
1996 pm_runtime_disable(&pdev->dev);
1997 dma_release_channel(dd->dma_lch);
1998
1999 return 0;
2000 }
2001
2002 #ifdef CONFIG_PM_SLEEP
2003 static int omap_sham_suspend(struct device *dev)
2004 {
2005 pm_runtime_put_sync(dev);
2006 return 0;
2007 }
2008
2009 static int omap_sham_resume(struct device *dev)
2010 {
2011 pm_runtime_get_sync(dev);
2012 return 0;
2013 }
2014 #endif
2015
2016 static const struct dev_pm_ops omap_sham_pm_ops = {
2017 SET_SYSTEM_SLEEP_PM_OPS(omap_sham_suspend, omap_sham_resume)
2018 };
2019
2020 static struct platform_driver omap_sham_driver = {
2021 .probe = omap_sham_probe,
2022 .remove = omap_sham_remove,
2023 .driver = {
2024 .name = "omap-sham",
2025 .owner = THIS_MODULE,
2026 .pm = &omap_sham_pm_ops,
2027 .of_match_table = omap_sham_of_match,
2028 },
2029 };
2030
2031 module_platform_driver(omap_sham_driver);
2032
2033 MODULE_DESCRIPTION("OMAP SHA1/MD5 hw acceleration support.");
2034 MODULE_LICENSE("GPL v2");
2035 MODULE_AUTHOR("Dmitry Kasatkin");
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