Version:  2.0.40 2.2.26 2.4.37 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8

Linux/drivers/crypto/omap-sham.c

  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/pm_runtime.h>
 33 #include <linux/of.h>
 34 #include <linux/of_device.h>
 35 #include <linux/of_address.h>
 36 #include <linux/of_irq.h>
 37 #include <linux/delay.h>
 38 #include <linux/crypto.h>
 39 #include <linux/cryptohash.h>
 40 #include <crypto/scatterwalk.h>
 41 #include <crypto/algapi.h>
 42 #include <crypto/sha.h>
 43 #include <crypto/hash.h>
 44 #include <crypto/internal/hash.h>
 45 
 46 #define MD5_DIGEST_SIZE                 16
 47 
 48 #define SHA_REG_IDIGEST(dd, x)          ((dd)->pdata->idigest_ofs + ((x)*0x04))
 49 #define SHA_REG_DIN(dd, x)              ((dd)->pdata->din_ofs + ((x) * 0x04))
 50 #define SHA_REG_DIGCNT(dd)              ((dd)->pdata->digcnt_ofs)
 51 
 52 #define SHA_REG_ODIGEST(dd, x)          ((dd)->pdata->odigest_ofs + (x * 0x04))
 53 
 54 #define SHA_REG_CTRL                    0x18
 55 #define SHA_REG_CTRL_LENGTH             (0xFFFFFFFF << 5)
 56 #define SHA_REG_CTRL_CLOSE_HASH         (1 << 4)
 57 #define SHA_REG_CTRL_ALGO_CONST         (1 << 3)
 58 #define SHA_REG_CTRL_ALGO               (1 << 2)
 59 #define SHA_REG_CTRL_INPUT_READY        (1 << 1)
 60 #define SHA_REG_CTRL_OUTPUT_READY       (1 << 0)
 61 
 62 #define SHA_REG_REV(dd)                 ((dd)->pdata->rev_ofs)
 63 
 64 #define SHA_REG_MASK(dd)                ((dd)->pdata->mask_ofs)
 65 #define SHA_REG_MASK_DMA_EN             (1 << 3)
 66 #define SHA_REG_MASK_IT_EN              (1 << 2)
 67 #define SHA_REG_MASK_SOFTRESET          (1 << 1)
 68 #define SHA_REG_AUTOIDLE                (1 << 0)
 69 
 70 #define SHA_REG_SYSSTATUS(dd)           ((dd)->pdata->sysstatus_ofs)
 71 #define SHA_REG_SYSSTATUS_RESETDONE     (1 << 0)
 72 
 73 #define SHA_REG_MODE(dd)                ((dd)->pdata->mode_ofs)
 74 #define SHA_REG_MODE_HMAC_OUTER_HASH    (1 << 7)
 75 #define SHA_REG_MODE_HMAC_KEY_PROC      (1 << 5)
 76 #define SHA_REG_MODE_CLOSE_HASH         (1 << 4)
 77 #define SHA_REG_MODE_ALGO_CONSTANT      (1 << 3)
 78 
 79 #define SHA_REG_MODE_ALGO_MASK          (7 << 0)
 80 #define SHA_REG_MODE_ALGO_MD5_128       (0 << 1)
 81 #define SHA_REG_MODE_ALGO_SHA1_160      (1 << 1)
 82 #define SHA_REG_MODE_ALGO_SHA2_224      (2 << 1)
 83 #define SHA_REG_MODE_ALGO_SHA2_256      (3 << 1)
 84 #define SHA_REG_MODE_ALGO_SHA2_384      (1 << 0)
 85 #define SHA_REG_MODE_ALGO_SHA2_512      (3 << 0)
 86 
 87 #define SHA_REG_LENGTH(dd)              ((dd)->pdata->length_ofs)
 88 
 89 #define SHA_REG_IRQSTATUS               0x118
 90 #define SHA_REG_IRQSTATUS_CTX_RDY       (1 << 3)
 91 #define SHA_REG_IRQSTATUS_PARTHASH_RDY (1 << 2)
 92 #define SHA_REG_IRQSTATUS_INPUT_RDY     (1 << 1)
 93 #define SHA_REG_IRQSTATUS_OUTPUT_RDY    (1 << 0)
 94 
 95 #define SHA_REG_IRQENA                  0x11C
 96 #define SHA_REG_IRQENA_CTX_RDY          (1 << 3)
 97 #define SHA_REG_IRQENA_PARTHASH_RDY     (1 << 2)
 98 #define SHA_REG_IRQENA_INPUT_RDY        (1 << 1)
 99 #define SHA_REG_IRQENA_OUTPUT_RDY       (1 << 0)
100 
101 #define DEFAULT_TIMEOUT_INTERVAL        HZ
102 
103 #define DEFAULT_AUTOSUSPEND_DELAY       1000
104 
105 /* mostly device flags */
106 #define FLAGS_BUSY              0
107 #define FLAGS_FINAL             1
108 #define FLAGS_DMA_ACTIVE        2
109 #define FLAGS_OUTPUT_READY      3
110 #define FLAGS_INIT              4
111 #define FLAGS_CPU               5
112 #define FLAGS_DMA_READY         6
113 #define FLAGS_AUTO_XOR          7
114 #define FLAGS_BE32_SHA1         8
115 /* context flags */
116 #define FLAGS_FINUP             16
117 #define FLAGS_SG                17
118 
119 #define FLAGS_MODE_SHIFT        18
120 #define FLAGS_MODE_MASK         (SHA_REG_MODE_ALGO_MASK << FLAGS_MODE_SHIFT)
121 #define FLAGS_MODE_MD5          (SHA_REG_MODE_ALGO_MD5_128 << FLAGS_MODE_SHIFT)
122 #define FLAGS_MODE_SHA1         (SHA_REG_MODE_ALGO_SHA1_160 << FLAGS_MODE_SHIFT)
123 #define FLAGS_MODE_SHA224       (SHA_REG_MODE_ALGO_SHA2_224 << FLAGS_MODE_SHIFT)
124 #define FLAGS_MODE_SHA256       (SHA_REG_MODE_ALGO_SHA2_256 << FLAGS_MODE_SHIFT)
125 #define FLAGS_MODE_SHA384       (SHA_REG_MODE_ALGO_SHA2_384 << FLAGS_MODE_SHIFT)
126 #define FLAGS_MODE_SHA512       (SHA_REG_MODE_ALGO_SHA2_512 << FLAGS_MODE_SHIFT)
127 
128 #define FLAGS_HMAC              21
129 #define FLAGS_ERROR             22
130 
131 #define OP_UPDATE               1
132 #define OP_FINAL                2
133 
134 #define OMAP_ALIGN_MASK         (sizeof(u32)-1)
135 #define OMAP_ALIGNED            __attribute__((aligned(sizeof(u32))))
136 
137 #define BUFLEN                  PAGE_SIZE
138 
139 struct omap_sham_dev;
140 
141 struct omap_sham_reqctx {
142         struct omap_sham_dev    *dd;
143         unsigned long           flags;
144         unsigned long           op;
145 
146         u8                      digest[SHA512_DIGEST_SIZE] OMAP_ALIGNED;
147         size_t                  digcnt;
148         size_t                  bufcnt;
149         size_t                  buflen;
150         dma_addr_t              dma_addr;
151 
152         /* walk state */
153         struct scatterlist      *sg;
154         struct scatterlist      sgl;
155         unsigned int            offset; /* offset in current sg */
156         unsigned int            total;  /* total request */
157 
158         u8                      buffer[0] OMAP_ALIGNED;
159 };
160 
161 struct omap_sham_hmac_ctx {
162         struct crypto_shash     *shash;
163         u8                      ipad[SHA512_BLOCK_SIZE] OMAP_ALIGNED;
164         u8                      opad[SHA512_BLOCK_SIZE] OMAP_ALIGNED;
165 };
166 
167 struct omap_sham_ctx {
168         struct omap_sham_dev    *dd;
169 
170         unsigned long           flags;
171 
172         /* fallback stuff */
173         struct crypto_shash     *fallback;
174 
175         struct omap_sham_hmac_ctx base[0];
176 };
177 
178 #define OMAP_SHAM_QUEUE_LENGTH  10
179 
180 struct omap_sham_algs_info {
181         struct ahash_alg        *algs_list;
182         unsigned int            size;
183         unsigned int            registered;
184 };
185 
186 struct omap_sham_pdata {
187         struct omap_sham_algs_info      *algs_info;
188         unsigned int    algs_info_size;
189         unsigned long   flags;
190         int             digest_size;
191 
192         void            (*copy_hash)(struct ahash_request *req, int out);
193         void            (*write_ctrl)(struct omap_sham_dev *dd, size_t length,
194                                       int final, int dma);
195         void            (*trigger)(struct omap_sham_dev *dd, size_t length);
196         int             (*poll_irq)(struct omap_sham_dev *dd);
197         irqreturn_t     (*intr_hdlr)(int irq, void *dev_id);
198 
199         u32             odigest_ofs;
200         u32             idigest_ofs;
201         u32             din_ofs;
202         u32             digcnt_ofs;
203         u32             rev_ofs;
204         u32             mask_ofs;
205         u32             sysstatus_ofs;
206         u32             mode_ofs;
207         u32             length_ofs;
208 
209         u32             major_mask;
210         u32             major_shift;
211         u32             minor_mask;
212         u32             minor_shift;
213 };
214 
215 struct omap_sham_dev {
216         struct list_head        list;
217         unsigned long           phys_base;
218         struct device           *dev;
219         void __iomem            *io_base;
220         int                     irq;
221         spinlock_t              lock;
222         int                     err;
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         int err;
366 
367         err = pm_runtime_get_sync(dd->dev);
368         if (err < 0) {
369                 dev_err(dd->dev, "failed to get sync: %d\n", err);
370                 return err;
371         }
372 
373         if (!test_bit(FLAGS_INIT, &dd->flags)) {
374                 set_bit(FLAGS_INIT, &dd->flags);
375                 dd->err = 0;
376         }
377 
378         return 0;
379 }
380 
381 static void omap_sham_write_ctrl_omap2(struct omap_sham_dev *dd, size_t length,
382                                  int final, int dma)
383 {
384         struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
385         u32 val = length << 5, mask;
386 
387         if (likely(ctx->digcnt))
388                 omap_sham_write(dd, SHA_REG_DIGCNT(dd), ctx->digcnt);
389 
390         omap_sham_write_mask(dd, SHA_REG_MASK(dd),
391                 SHA_REG_MASK_IT_EN | (dma ? SHA_REG_MASK_DMA_EN : 0),
392                 SHA_REG_MASK_IT_EN | SHA_REG_MASK_DMA_EN);
393         /*
394          * Setting ALGO_CONST only for the first iteration
395          * and CLOSE_HASH only for the last one.
396          */
397         if ((ctx->flags & FLAGS_MODE_MASK) == FLAGS_MODE_SHA1)
398                 val |= SHA_REG_CTRL_ALGO;
399         if (!ctx->digcnt)
400                 val |= SHA_REG_CTRL_ALGO_CONST;
401         if (final)
402                 val |= SHA_REG_CTRL_CLOSE_HASH;
403 
404         mask = SHA_REG_CTRL_ALGO_CONST | SHA_REG_CTRL_CLOSE_HASH |
405                         SHA_REG_CTRL_ALGO | SHA_REG_CTRL_LENGTH;
406 
407         omap_sham_write_mask(dd, SHA_REG_CTRL, val, mask);
408 }
409 
410 static void omap_sham_trigger_omap2(struct omap_sham_dev *dd, size_t length)
411 {
412 }
413 
414 static int omap_sham_poll_irq_omap2(struct omap_sham_dev *dd)
415 {
416         return omap_sham_wait(dd, SHA_REG_CTRL, SHA_REG_CTRL_INPUT_READY);
417 }
418 
419 static int get_block_size(struct omap_sham_reqctx *ctx)
420 {
421         int d;
422 
423         switch (ctx->flags & FLAGS_MODE_MASK) {
424         case FLAGS_MODE_MD5:
425         case FLAGS_MODE_SHA1:
426                 d = SHA1_BLOCK_SIZE;
427                 break;
428         case FLAGS_MODE_SHA224:
429         case FLAGS_MODE_SHA256:
430                 d = SHA256_BLOCK_SIZE;
431                 break;
432         case FLAGS_MODE_SHA384:
433         case FLAGS_MODE_SHA512:
434                 d = SHA512_BLOCK_SIZE;
435                 break;
436         default:
437                 d = 0;
438         }
439 
440         return d;
441 }
442 
443 static void omap_sham_write_n(struct omap_sham_dev *dd, u32 offset,
444                                     u32 *value, int count)
445 {
446         for (; count--; value++, offset += 4)
447                 omap_sham_write(dd, offset, *value);
448 }
449 
450 static void omap_sham_write_ctrl_omap4(struct omap_sham_dev *dd, size_t length,
451                                  int final, int dma)
452 {
453         struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
454         u32 val, mask;
455 
456         /*
457          * Setting ALGO_CONST only for the first iteration and
458          * CLOSE_HASH only for the last one. Note that flags mode bits
459          * correspond to algorithm encoding in mode register.
460          */
461         val = (ctx->flags & FLAGS_MODE_MASK) >> (FLAGS_MODE_SHIFT);
462         if (!ctx->digcnt) {
463                 struct crypto_ahash *tfm = crypto_ahash_reqtfm(dd->req);
464                 struct omap_sham_ctx *tctx = crypto_ahash_ctx(tfm);
465                 struct omap_sham_hmac_ctx *bctx = tctx->base;
466                 int bs, nr_dr;
467 
468                 val |= SHA_REG_MODE_ALGO_CONSTANT;
469 
470                 if (ctx->flags & BIT(FLAGS_HMAC)) {
471                         bs = get_block_size(ctx);
472                         nr_dr = bs / (2 * sizeof(u32));
473                         val |= SHA_REG_MODE_HMAC_KEY_PROC;
474                         omap_sham_write_n(dd, SHA_REG_ODIGEST(dd, 0),
475                                           (u32 *)bctx->ipad, nr_dr);
476                         omap_sham_write_n(dd, SHA_REG_IDIGEST(dd, 0),
477                                           (u32 *)bctx->ipad + nr_dr, nr_dr);
478                         ctx->digcnt += bs;
479                 }
480         }
481 
482         if (final) {
483                 val |= SHA_REG_MODE_CLOSE_HASH;
484 
485                 if (ctx->flags & BIT(FLAGS_HMAC))
486                         val |= SHA_REG_MODE_HMAC_OUTER_HASH;
487         }
488 
489         mask = SHA_REG_MODE_ALGO_CONSTANT | SHA_REG_MODE_CLOSE_HASH |
490                SHA_REG_MODE_ALGO_MASK | SHA_REG_MODE_HMAC_OUTER_HASH |
491                SHA_REG_MODE_HMAC_KEY_PROC;
492 
493         dev_dbg(dd->dev, "ctrl: %08x, flags: %08lx\n", val, ctx->flags);
494         omap_sham_write_mask(dd, SHA_REG_MODE(dd), val, mask);
495         omap_sham_write(dd, SHA_REG_IRQENA, SHA_REG_IRQENA_OUTPUT_RDY);
496         omap_sham_write_mask(dd, SHA_REG_MASK(dd),
497                              SHA_REG_MASK_IT_EN |
498                                      (dma ? SHA_REG_MASK_DMA_EN : 0),
499                              SHA_REG_MASK_IT_EN | SHA_REG_MASK_DMA_EN);
500 }
501 
502 static void omap_sham_trigger_omap4(struct omap_sham_dev *dd, size_t length)
503 {
504         omap_sham_write(dd, SHA_REG_LENGTH(dd), length);
505 }
506 
507 static int omap_sham_poll_irq_omap4(struct omap_sham_dev *dd)
508 {
509         return omap_sham_wait(dd, SHA_REG_IRQSTATUS,
510                               SHA_REG_IRQSTATUS_INPUT_RDY);
511 }
512 
513 static int omap_sham_xmit_cpu(struct omap_sham_dev *dd, const u8 *buf,
514                               size_t length, int final)
515 {
516         struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
517         int count, len32, bs32, offset = 0;
518         const u32 *buffer = (const u32 *)buf;
519 
520         dev_dbg(dd->dev, "xmit_cpu: digcnt: %d, length: %d, final: %d\n",
521                                                 ctx->digcnt, length, final);
522 
523         dd->pdata->write_ctrl(dd, length, final, 0);
524         dd->pdata->trigger(dd, length);
525 
526         /* should be non-zero before next lines to disable clocks later */
527         ctx->digcnt += length;
528 
529         if (final)
530                 set_bit(FLAGS_FINAL, &dd->flags); /* catch last interrupt */
531 
532         set_bit(FLAGS_CPU, &dd->flags);
533 
534         len32 = DIV_ROUND_UP(length, sizeof(u32));
535         bs32 = get_block_size(ctx) / sizeof(u32);
536 
537         while (len32) {
538                 if (dd->pdata->poll_irq(dd))
539                         return -ETIMEDOUT;
540 
541                 for (count = 0; count < min(len32, bs32); count++, offset++)
542                         omap_sham_write(dd, SHA_REG_DIN(dd, count),
543                                         buffer[offset]);
544                 len32 -= min(len32, bs32);
545         }
546 
547         return -EINPROGRESS;
548 }
549 
550 static void omap_sham_dma_callback(void *param)
551 {
552         struct omap_sham_dev *dd = param;
553 
554         set_bit(FLAGS_DMA_READY, &dd->flags);
555         tasklet_schedule(&dd->done_task);
556 }
557 
558 static int omap_sham_xmit_dma(struct omap_sham_dev *dd, dma_addr_t dma_addr,
559                               size_t length, int final, int is_sg)
560 {
561         struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
562         struct dma_async_tx_descriptor *tx;
563         struct dma_slave_config cfg;
564         int len32, ret, dma_min = get_block_size(ctx);
565 
566         dev_dbg(dd->dev, "xmit_dma: digcnt: %d, length: %d, final: %d\n",
567                                                 ctx->digcnt, length, final);
568 
569         memset(&cfg, 0, sizeof(cfg));
570 
571         cfg.dst_addr = dd->phys_base + SHA_REG_DIN(dd, 0);
572         cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
573         cfg.dst_maxburst = dma_min / DMA_SLAVE_BUSWIDTH_4_BYTES;
574 
575         ret = dmaengine_slave_config(dd->dma_lch, &cfg);
576         if (ret) {
577                 pr_err("omap-sham: can't configure dmaengine slave: %d\n", ret);
578                 return ret;
579         }
580 
581         len32 = DIV_ROUND_UP(length, dma_min) * dma_min;
582 
583         if (is_sg) {
584                 /*
585                  * The SG entry passed in may not have the 'length' member
586                  * set correctly so use a local SG entry (sgl) with the
587                  * proper value for 'length' instead.  If this is not done,
588                  * the dmaengine may try to DMA the incorrect amount of data.
589                  */
590                 sg_init_table(&ctx->sgl, 1);
591                 sg_assign_page(&ctx->sgl, sg_page(ctx->sg));
592                 ctx->sgl.offset = ctx->sg->offset;
593                 sg_dma_len(&ctx->sgl) = len32;
594                 sg_dma_address(&ctx->sgl) = sg_dma_address(ctx->sg);
595 
596                 tx = dmaengine_prep_slave_sg(dd->dma_lch, &ctx->sgl, 1,
597                         DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
598         } else {
599                 tx = dmaengine_prep_slave_single(dd->dma_lch, dma_addr, len32,
600                         DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
601         }
602 
603         if (!tx) {
604                 dev_err(dd->dev, "prep_slave_sg/single() failed\n");
605                 return -EINVAL;
606         }
607 
608         tx->callback = omap_sham_dma_callback;
609         tx->callback_param = dd;
610 
611         dd->pdata->write_ctrl(dd, length, final, 1);
612 
613         ctx->digcnt += length;
614 
615         if (final)
616                 set_bit(FLAGS_FINAL, &dd->flags); /* catch last interrupt */
617 
618         set_bit(FLAGS_DMA_ACTIVE, &dd->flags);
619 
620         dmaengine_submit(tx);
621         dma_async_issue_pending(dd->dma_lch);
622 
623         dd->pdata->trigger(dd, length);
624 
625         return -EINPROGRESS;
626 }
627 
628 static size_t omap_sham_append_buffer(struct omap_sham_reqctx *ctx,
629                                 const u8 *data, size_t length)
630 {
631         size_t count = min(length, ctx->buflen - ctx->bufcnt);
632 
633         count = min(count, ctx->total);
634         if (count <= 0)
635                 return 0;
636         memcpy(ctx->buffer + ctx->bufcnt, data, count);
637         ctx->bufcnt += count;
638 
639         return count;
640 }
641 
642 static size_t omap_sham_append_sg(struct omap_sham_reqctx *ctx)
643 {
644         size_t count;
645         const u8 *vaddr;
646 
647         while (ctx->sg) {
648                 vaddr = kmap_atomic(sg_page(ctx->sg));
649                 vaddr += ctx->sg->offset;
650 
651                 count = omap_sham_append_buffer(ctx,
652                                 vaddr + ctx->offset,
653                                 ctx->sg->length - ctx->offset);
654 
655                 kunmap_atomic((void *)vaddr);
656 
657                 if (!count)
658                         break;
659                 ctx->offset += count;
660                 ctx->total -= count;
661                 if (ctx->offset == ctx->sg->length) {
662                         ctx->sg = sg_next(ctx->sg);
663                         if (ctx->sg)
664                                 ctx->offset = 0;
665                         else
666                                 ctx->total = 0;
667                 }
668         }
669 
670         return 0;
671 }
672 
673 static int omap_sham_xmit_dma_map(struct omap_sham_dev *dd,
674                                         struct omap_sham_reqctx *ctx,
675                                         size_t length, int final)
676 {
677         int ret;
678 
679         ctx->dma_addr = dma_map_single(dd->dev, ctx->buffer, ctx->buflen,
680                                        DMA_TO_DEVICE);
681         if (dma_mapping_error(dd->dev, ctx->dma_addr)) {
682                 dev_err(dd->dev, "dma %u bytes error\n", ctx->buflen);
683                 return -EINVAL;
684         }
685 
686         ctx->flags &= ~BIT(FLAGS_SG);
687 
688         ret = omap_sham_xmit_dma(dd, ctx->dma_addr, length, final, 0);
689         if (ret != -EINPROGRESS)
690                 dma_unmap_single(dd->dev, ctx->dma_addr, ctx->buflen,
691                                  DMA_TO_DEVICE);
692 
693         return ret;
694 }
695 
696 static int omap_sham_update_dma_slow(struct omap_sham_dev *dd)
697 {
698         struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
699         unsigned int final;
700         size_t count;
701 
702         omap_sham_append_sg(ctx);
703 
704         final = (ctx->flags & BIT(FLAGS_FINUP)) && !ctx->total;
705 
706         dev_dbg(dd->dev, "slow: bufcnt: %u, digcnt: %d, final: %d\n",
707                                          ctx->bufcnt, ctx->digcnt, final);
708 
709         if (final || (ctx->bufcnt == ctx->buflen && ctx->total)) {
710                 count = ctx->bufcnt;
711                 ctx->bufcnt = 0;
712                 return omap_sham_xmit_dma_map(dd, ctx, count, final);
713         }
714 
715         return 0;
716 }
717 
718 /* Start address alignment */
719 #define SG_AA(sg)       (IS_ALIGNED(sg->offset, sizeof(u32)))
720 /* SHA1 block size alignment */
721 #define SG_SA(sg, bs)   (IS_ALIGNED(sg->length, bs))
722 
723 static int omap_sham_update_dma_start(struct omap_sham_dev *dd)
724 {
725         struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
726         unsigned int length, final, tail;
727         struct scatterlist *sg;
728         int ret, bs;
729 
730         if (!ctx->total)
731                 return 0;
732 
733         if (ctx->bufcnt || ctx->offset)
734                 return omap_sham_update_dma_slow(dd);
735 
736         /*
737          * Don't use the sg interface when the transfer size is less
738          * than the number of elements in a DMA frame.  Otherwise,
739          * the dmaengine infrastructure will calculate that it needs
740          * to transfer 0 frames which ultimately fails.
741          */
742         if (ctx->total < get_block_size(ctx))
743                 return omap_sham_update_dma_slow(dd);
744 
745         dev_dbg(dd->dev, "fast: digcnt: %d, bufcnt: %u, total: %u\n",
746                         ctx->digcnt, ctx->bufcnt, ctx->total);
747 
748         sg = ctx->sg;
749         bs = get_block_size(ctx);
750 
751         if (!SG_AA(sg))
752                 return omap_sham_update_dma_slow(dd);
753 
754         if (!sg_is_last(sg) && !SG_SA(sg, bs))
755                 /* size is not BLOCK_SIZE aligned */
756                 return omap_sham_update_dma_slow(dd);
757 
758         length = min(ctx->total, sg->length);
759 
760         if (sg_is_last(sg)) {
761                 if (!(ctx->flags & BIT(FLAGS_FINUP))) {
762                         /* not last sg must be BLOCK_SIZE aligned */
763                         tail = length & (bs - 1);
764                         /* without finup() we need one block to close hash */
765                         if (!tail)
766                                 tail = bs;
767                         length -= tail;
768                 }
769         }
770 
771         if (!dma_map_sg(dd->dev, ctx->sg, 1, DMA_TO_DEVICE)) {
772                 dev_err(dd->dev, "dma_map_sg  error\n");
773                 return -EINVAL;
774         }
775 
776         ctx->flags |= BIT(FLAGS_SG);
777 
778         ctx->total -= length;
779         ctx->offset = length; /* offset where to start slow */
780 
781         final = (ctx->flags & BIT(FLAGS_FINUP)) && !ctx->total;
782 
783         ret = omap_sham_xmit_dma(dd, sg_dma_address(ctx->sg), length, final, 1);
784         if (ret != -EINPROGRESS)
785                 dma_unmap_sg(dd->dev, ctx->sg, 1, DMA_TO_DEVICE);
786 
787         return ret;
788 }
789 
790 static int omap_sham_update_cpu(struct omap_sham_dev *dd)
791 {
792         struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
793         int bufcnt, final;
794 
795         if (!ctx->total)
796                 return 0;
797 
798         omap_sham_append_sg(ctx);
799 
800         final = (ctx->flags & BIT(FLAGS_FINUP)) && !ctx->total;
801 
802         dev_dbg(dd->dev, "cpu: bufcnt: %u, digcnt: %d, final: %d\n",
803                 ctx->bufcnt, ctx->digcnt, final);
804 
805         if (final || (ctx->bufcnt == ctx->buflen && ctx->total)) {
806                 bufcnt = ctx->bufcnt;
807                 ctx->bufcnt = 0;
808                 return omap_sham_xmit_cpu(dd, ctx->buffer, bufcnt, final);
809         }
810 
811         return 0;
812 }
813 
814 static int omap_sham_update_dma_stop(struct omap_sham_dev *dd)
815 {
816         struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
817 
818 
819         if (ctx->flags & BIT(FLAGS_SG)) {
820                 dma_unmap_sg(dd->dev, ctx->sg, 1, DMA_TO_DEVICE);
821                 if (ctx->sg->length == ctx->offset) {
822                         ctx->sg = sg_next(ctx->sg);
823                         if (ctx->sg)
824                                 ctx->offset = 0;
825                 }
826         } else {
827                 dma_unmap_single(dd->dev, ctx->dma_addr, ctx->buflen,
828                                  DMA_TO_DEVICE);
829         }
830 
831         return 0;
832 }
833 
834 static int omap_sham_init(struct ahash_request *req)
835 {
836         struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
837         struct omap_sham_ctx *tctx = crypto_ahash_ctx(tfm);
838         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
839         struct omap_sham_dev *dd = NULL, *tmp;
840         int bs = 0;
841 
842         spin_lock_bh(&sham.lock);
843         if (!tctx->dd) {
844                 list_for_each_entry(tmp, &sham.dev_list, list) {
845                         dd = tmp;
846                         break;
847                 }
848                 tctx->dd = dd;
849         } else {
850                 dd = tctx->dd;
851         }
852         spin_unlock_bh(&sham.lock);
853 
854         ctx->dd = dd;
855 
856         ctx->flags = 0;
857 
858         dev_dbg(dd->dev, "init: digest size: %d\n",
859                 crypto_ahash_digestsize(tfm));
860 
861         switch (crypto_ahash_digestsize(tfm)) {
862         case MD5_DIGEST_SIZE:
863                 ctx->flags |= FLAGS_MODE_MD5;
864                 bs = SHA1_BLOCK_SIZE;
865                 break;
866         case SHA1_DIGEST_SIZE:
867                 ctx->flags |= FLAGS_MODE_SHA1;
868                 bs = SHA1_BLOCK_SIZE;
869                 break;
870         case SHA224_DIGEST_SIZE:
871                 ctx->flags |= FLAGS_MODE_SHA224;
872                 bs = SHA224_BLOCK_SIZE;
873                 break;
874         case SHA256_DIGEST_SIZE:
875                 ctx->flags |= FLAGS_MODE_SHA256;
876                 bs = SHA256_BLOCK_SIZE;
877                 break;
878         case SHA384_DIGEST_SIZE:
879                 ctx->flags |= FLAGS_MODE_SHA384;
880                 bs = SHA384_BLOCK_SIZE;
881                 break;
882         case SHA512_DIGEST_SIZE:
883                 ctx->flags |= FLAGS_MODE_SHA512;
884                 bs = SHA512_BLOCK_SIZE;
885                 break;
886         }
887 
888         ctx->bufcnt = 0;
889         ctx->digcnt = 0;
890         ctx->buflen = BUFLEN;
891 
892         if (tctx->flags & BIT(FLAGS_HMAC)) {
893                 if (!test_bit(FLAGS_AUTO_XOR, &dd->flags)) {
894                         struct omap_sham_hmac_ctx *bctx = tctx->base;
895 
896                         memcpy(ctx->buffer, bctx->ipad, bs);
897                         ctx->bufcnt = bs;
898                 }
899 
900                 ctx->flags |= BIT(FLAGS_HMAC);
901         }
902 
903         return 0;
904 
905 }
906 
907 static int omap_sham_update_req(struct omap_sham_dev *dd)
908 {
909         struct ahash_request *req = dd->req;
910         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
911         int err;
912 
913         dev_dbg(dd->dev, "update_req: total: %u, digcnt: %d, finup: %d\n",
914                  ctx->total, ctx->digcnt, (ctx->flags & BIT(FLAGS_FINUP)) != 0);
915 
916         if (ctx->flags & BIT(FLAGS_CPU))
917                 err = omap_sham_update_cpu(dd);
918         else
919                 err = omap_sham_update_dma_start(dd);
920 
921         /* wait for dma completion before can take more data */
922         dev_dbg(dd->dev, "update: err: %d, digcnt: %d\n", err, ctx->digcnt);
923 
924         return err;
925 }
926 
927 static int omap_sham_final_req(struct omap_sham_dev *dd)
928 {
929         struct ahash_request *req = dd->req;
930         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
931         int err = 0, use_dma = 1;
932 
933         if ((ctx->bufcnt <= get_block_size(ctx)) || dd->polling_mode)
934                 /*
935                  * faster to handle last block with cpu or
936                  * use cpu when dma is not present.
937                  */
938                 use_dma = 0;
939 
940         if (use_dma)
941                 err = omap_sham_xmit_dma_map(dd, ctx, ctx->bufcnt, 1);
942         else
943                 err = omap_sham_xmit_cpu(dd, ctx->buffer, ctx->bufcnt, 1);
944 
945         ctx->bufcnt = 0;
946 
947         dev_dbg(dd->dev, "final_req: err: %d\n", err);
948 
949         return err;
950 }
951 
952 static int omap_sham_finish_hmac(struct ahash_request *req)
953 {
954         struct omap_sham_ctx *tctx = crypto_tfm_ctx(req->base.tfm);
955         struct omap_sham_hmac_ctx *bctx = tctx->base;
956         int bs = crypto_shash_blocksize(bctx->shash);
957         int ds = crypto_shash_digestsize(bctx->shash);
958         SHASH_DESC_ON_STACK(shash, bctx->shash);
959 
960         shash->tfm = bctx->shash;
961         shash->flags = 0; /* not CRYPTO_TFM_REQ_MAY_SLEEP */
962 
963         return crypto_shash_init(shash) ?:
964                crypto_shash_update(shash, bctx->opad, bs) ?:
965                crypto_shash_finup(shash, req->result, ds, req->result);
966 }
967 
968 static int omap_sham_finish(struct ahash_request *req)
969 {
970         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
971         struct omap_sham_dev *dd = ctx->dd;
972         int err = 0;
973 
974         if (ctx->digcnt) {
975                 omap_sham_copy_ready_hash(req);
976                 if ((ctx->flags & BIT(FLAGS_HMAC)) &&
977                                 !test_bit(FLAGS_AUTO_XOR, &dd->flags))
978                         err = omap_sham_finish_hmac(req);
979         }
980 
981         dev_dbg(dd->dev, "digcnt: %d, bufcnt: %d\n", ctx->digcnt, ctx->bufcnt);
982 
983         return err;
984 }
985 
986 static void omap_sham_finish_req(struct ahash_request *req, int err)
987 {
988         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
989         struct omap_sham_dev *dd = ctx->dd;
990 
991         if (!err) {
992                 dd->pdata->copy_hash(req, 1);
993                 if (test_bit(FLAGS_FINAL, &dd->flags))
994                         err = omap_sham_finish(req);
995         } else {
996                 ctx->flags |= BIT(FLAGS_ERROR);
997         }
998 
999         /* atomic operation is not needed here */
1000         dd->flags &= ~(BIT(FLAGS_BUSY) | BIT(FLAGS_FINAL) | BIT(FLAGS_CPU) |
1001                         BIT(FLAGS_DMA_READY) | BIT(FLAGS_OUTPUT_READY));
1002 
1003         pm_runtime_mark_last_busy(dd->dev);
1004         pm_runtime_put_autosuspend(dd->dev);
1005 
1006         if (req->base.complete)
1007                 req->base.complete(&req->base, err);
1008 
1009         /* handle new request */
1010         tasklet_schedule(&dd->done_task);
1011 }
1012 
1013 static int omap_sham_handle_queue(struct omap_sham_dev *dd,
1014                                   struct ahash_request *req)
1015 {
1016         struct crypto_async_request *async_req, *backlog;
1017         struct omap_sham_reqctx *ctx;
1018         unsigned long flags;
1019         int err = 0, ret = 0;
1020 
1021         spin_lock_irqsave(&dd->lock, flags);
1022         if (req)
1023                 ret = ahash_enqueue_request(&dd->queue, req);
1024         if (test_bit(FLAGS_BUSY, &dd->flags)) {
1025                 spin_unlock_irqrestore(&dd->lock, flags);
1026                 return ret;
1027         }
1028         backlog = crypto_get_backlog(&dd->queue);
1029         async_req = crypto_dequeue_request(&dd->queue);
1030         if (async_req)
1031                 set_bit(FLAGS_BUSY, &dd->flags);
1032         spin_unlock_irqrestore(&dd->lock, flags);
1033 
1034         if (!async_req)
1035                 return ret;
1036 
1037         if (backlog)
1038                 backlog->complete(backlog, -EINPROGRESS);
1039 
1040         req = ahash_request_cast(async_req);
1041         dd->req = req;
1042         ctx = ahash_request_ctx(req);
1043 
1044         dev_dbg(dd->dev, "handling new req, op: %lu, nbytes: %d\n",
1045                                                 ctx->op, req->nbytes);
1046 
1047         err = omap_sham_hw_init(dd);
1048         if (err)
1049                 goto err1;
1050 
1051         if (ctx->digcnt)
1052                 /* request has changed - restore hash */
1053                 dd->pdata->copy_hash(req, 0);
1054 
1055         if (ctx->op == OP_UPDATE) {
1056                 err = omap_sham_update_req(dd);
1057                 if (err != -EINPROGRESS && (ctx->flags & BIT(FLAGS_FINUP)))
1058                         /* no final() after finup() */
1059                         err = omap_sham_final_req(dd);
1060         } else if (ctx->op == OP_FINAL) {
1061                 err = omap_sham_final_req(dd);
1062         }
1063 err1:
1064         if (err != -EINPROGRESS)
1065                 /* done_task will not finish it, so do it here */
1066                 omap_sham_finish_req(req, err);
1067 
1068         dev_dbg(dd->dev, "exit, err: %d\n", err);
1069 
1070         return ret;
1071 }
1072 
1073 static int omap_sham_enqueue(struct ahash_request *req, unsigned int op)
1074 {
1075         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
1076         struct omap_sham_ctx *tctx = crypto_tfm_ctx(req->base.tfm);
1077         struct omap_sham_dev *dd = tctx->dd;
1078 
1079         ctx->op = op;
1080 
1081         return omap_sham_handle_queue(dd, req);
1082 }
1083 
1084 static int omap_sham_update(struct ahash_request *req)
1085 {
1086         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
1087         struct omap_sham_dev *dd = ctx->dd;
1088         int bs = get_block_size(ctx);
1089 
1090         if (!req->nbytes)
1091                 return 0;
1092 
1093         ctx->total = req->nbytes;
1094         ctx->sg = req->src;
1095         ctx->offset = 0;
1096 
1097         if (ctx->flags & BIT(FLAGS_FINUP)) {
1098                 if ((ctx->digcnt + ctx->bufcnt + ctx->total) < 240) {
1099                         /*
1100                         * OMAP HW accel works only with buffers >= 9
1101                         * will switch to bypass in final()
1102                         * final has the same request and data
1103                         */
1104                         omap_sham_append_sg(ctx);
1105                         return 0;
1106                 } else if ((ctx->bufcnt + ctx->total <= bs) ||
1107                            dd->polling_mode) {
1108                         /*
1109                          * faster to use CPU for short transfers or
1110                          * use cpu when dma is not present.
1111                          */
1112                         ctx->flags |= BIT(FLAGS_CPU);
1113                 }
1114         } else if (ctx->bufcnt + ctx->total < ctx->buflen) {
1115                 omap_sham_append_sg(ctx);
1116                 return 0;
1117         }
1118 
1119         if (dd->polling_mode)
1120                 ctx->flags |= BIT(FLAGS_CPU);
1121 
1122         return omap_sham_enqueue(req, OP_UPDATE);
1123 }
1124 
1125 static int omap_sham_shash_digest(struct crypto_shash *tfm, u32 flags,
1126                                   const u8 *data, unsigned int len, u8 *out)
1127 {
1128         SHASH_DESC_ON_STACK(shash, tfm);
1129 
1130         shash->tfm = tfm;
1131         shash->flags = flags & CRYPTO_TFM_REQ_MAY_SLEEP;
1132 
1133         return crypto_shash_digest(shash, data, len, out);
1134 }
1135 
1136 static int omap_sham_final_shash(struct ahash_request *req)
1137 {
1138         struct omap_sham_ctx *tctx = crypto_tfm_ctx(req->base.tfm);
1139         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
1140 
1141         return omap_sham_shash_digest(tctx->fallback, req->base.flags,
1142                                       ctx->buffer, ctx->bufcnt, req->result);
1143 }
1144 
1145 static int omap_sham_final(struct ahash_request *req)
1146 {
1147         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
1148 
1149         ctx->flags |= BIT(FLAGS_FINUP);
1150 
1151         if (ctx->flags & BIT(FLAGS_ERROR))
1152                 return 0; /* uncompleted hash is not needed */
1153 
1154         /*
1155          * OMAP HW accel works only with buffers >= 9.
1156          * HMAC is always >= 9 because ipad == block size.
1157          * If buffersize is less than 240, we use fallback SW encoding,
1158          * as using DMA + HW in this case doesn't provide any benefit.
1159          */
1160         if ((ctx->digcnt + ctx->bufcnt) < 240)
1161                 return omap_sham_final_shash(req);
1162         else if (ctx->bufcnt)
1163                 return omap_sham_enqueue(req, OP_FINAL);
1164 
1165         /* copy ready hash (+ finalize hmac) */
1166         return omap_sham_finish(req);
1167 }
1168 
1169 static int omap_sham_finup(struct ahash_request *req)
1170 {
1171         struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
1172         int err1, err2;
1173 
1174         ctx->flags |= BIT(FLAGS_FINUP);
1175 
1176         err1 = omap_sham_update(req);
1177         if (err1 == -EINPROGRESS || err1 == -EBUSY)
1178                 return err1;
1179         /*
1180          * final() has to be always called to cleanup resources
1181          * even if udpate() failed, except EINPROGRESS
1182          */
1183         err2 = omap_sham_final(req);
1184 
1185         return err1 ?: err2;
1186 }
1187 
1188 static int omap_sham_digest(struct ahash_request *req)
1189 {
1190         return omap_sham_init(req) ?: omap_sham_finup(req);
1191 }
1192 
1193 static int omap_sham_setkey(struct crypto_ahash *tfm, const u8 *key,
1194                       unsigned int keylen)
1195 {
1196         struct omap_sham_ctx *tctx = crypto_ahash_ctx(tfm);
1197         struct omap_sham_hmac_ctx *bctx = tctx->base;
1198         int bs = crypto_shash_blocksize(bctx->shash);
1199         int ds = crypto_shash_digestsize(bctx->shash);
1200         struct omap_sham_dev *dd = NULL, *tmp;
1201         int err, i;
1202 
1203         spin_lock_bh(&sham.lock);
1204         if (!tctx->dd) {
1205                 list_for_each_entry(tmp, &sham.dev_list, list) {
1206                         dd = tmp;
1207                         break;
1208                 }
1209                 tctx->dd = dd;
1210         } else {
1211                 dd = tctx->dd;
1212         }
1213         spin_unlock_bh(&sham.lock);
1214 
1215         err = crypto_shash_setkey(tctx->fallback, key, keylen);
1216         if (err)
1217                 return err;
1218 
1219         if (keylen > bs) {
1220                 err = omap_sham_shash_digest(bctx->shash,
1221                                 crypto_shash_get_flags(bctx->shash),
1222                                 key, keylen, bctx->ipad);
1223                 if (err)
1224                         return err;
1225                 keylen = ds;
1226         } else {
1227                 memcpy(bctx->ipad, key, keylen);
1228         }
1229 
1230         memset(bctx->ipad + keylen, 0, bs - keylen);
1231 
1232         if (!test_bit(FLAGS_AUTO_XOR, &dd->flags)) {
1233                 memcpy(bctx->opad, bctx->ipad, bs);
1234 
1235                 for (i = 0; i < bs; i++) {
1236                         bctx->ipad[i] ^= 0x36;
1237                         bctx->opad[i] ^= 0x5c;
1238                 }
1239         }
1240 
1241         return err;
1242 }
1243 
1244 static int omap_sham_cra_init_alg(struct crypto_tfm *tfm, const char *alg_base)
1245 {
1246         struct omap_sham_ctx *tctx = crypto_tfm_ctx(tfm);
1247         const char *alg_name = crypto_tfm_alg_name(tfm);
1248 
1249         /* Allocate a fallback and abort if it failed. */
1250         tctx->fallback = crypto_alloc_shash(alg_name, 0,
1251                                             CRYPTO_ALG_NEED_FALLBACK);
1252         if (IS_ERR(tctx->fallback)) {
1253                 pr_err("omap-sham: fallback driver '%s' "
1254                                 "could not be loaded.\n", alg_name);
1255                 return PTR_ERR(tctx->fallback);
1256         }
1257 
1258         crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
1259                                  sizeof(struct omap_sham_reqctx) + BUFLEN);
1260 
1261         if (alg_base) {
1262                 struct omap_sham_hmac_ctx *bctx = tctx->base;
1263                 tctx->flags |= BIT(FLAGS_HMAC);
1264                 bctx->shash = crypto_alloc_shash(alg_base, 0,
1265                                                 CRYPTO_ALG_NEED_FALLBACK);
1266                 if (IS_ERR(bctx->shash)) {
1267                         pr_err("omap-sham: base driver '%s' "
1268                                         "could not be loaded.\n", alg_base);
1269                         crypto_free_shash(tctx->fallback);
1270                         return PTR_ERR(bctx->shash);
1271                 }
1272 
1273         }
1274 
1275         return 0;
1276 }
1277 
1278 static int omap_sham_cra_init(struct crypto_tfm *tfm)
1279 {
1280         return omap_sham_cra_init_alg(tfm, NULL);
1281 }
1282 
1283 static int omap_sham_cra_sha1_init(struct crypto_tfm *tfm)
1284 {
1285         return omap_sham_cra_init_alg(tfm, "sha1");
1286 }
1287 
1288 static int omap_sham_cra_sha224_init(struct crypto_tfm *tfm)
1289 {
1290         return omap_sham_cra_init_alg(tfm, "sha224");
1291 }
1292 
1293 static int omap_sham_cra_sha256_init(struct crypto_tfm *tfm)
1294 {
1295         return omap_sham_cra_init_alg(tfm, "sha256");
1296 }
1297 
1298 static int omap_sham_cra_md5_init(struct crypto_tfm *tfm)
1299 {
1300         return omap_sham_cra_init_alg(tfm, "md5");
1301 }
1302 
1303 static int omap_sham_cra_sha384_init(struct crypto_tfm *tfm)
1304 {
1305         return omap_sham_cra_init_alg(tfm, "sha384");
1306 }
1307 
1308 static int omap_sham_cra_sha512_init(struct crypto_tfm *tfm)
1309 {
1310         return omap_sham_cra_init_alg(tfm, "sha512");
1311 }
1312 
1313 static void omap_sham_cra_exit(struct crypto_tfm *tfm)
1314 {
1315         struct omap_sham_ctx *tctx = crypto_tfm_ctx(tfm);
1316 
1317         crypto_free_shash(tctx->fallback);
1318         tctx->fallback = NULL;
1319 
1320         if (tctx->flags & BIT(FLAGS_HMAC)) {
1321                 struct omap_sham_hmac_ctx *bctx = tctx->base;
1322                 crypto_free_shash(bctx->shash);
1323         }
1324 }
1325 
1326 static struct ahash_alg algs_sha1_md5[] = {
1327 {
1328         .init           = omap_sham_init,
1329         .update         = omap_sham_update,
1330         .final          = omap_sham_final,
1331         .finup          = omap_sham_finup,
1332         .digest         = omap_sham_digest,
1333         .halg.digestsize        = SHA1_DIGEST_SIZE,
1334         .halg.base      = {
1335                 .cra_name               = "sha1",
1336                 .cra_driver_name        = "omap-sha1",
1337                 .cra_priority           = 400,
1338                 .cra_flags              = CRYPTO_ALG_TYPE_AHASH |
1339                                                 CRYPTO_ALG_KERN_DRIVER_ONLY |
1340                                                 CRYPTO_ALG_ASYNC |
1341                                                 CRYPTO_ALG_NEED_FALLBACK,
1342                 .cra_blocksize          = SHA1_BLOCK_SIZE,
1343                 .cra_ctxsize            = sizeof(struct omap_sham_ctx),
1344                 .cra_alignmask          = 0,
1345                 .cra_module             = THIS_MODULE,
1346                 .cra_init               = omap_sham_cra_init,
1347                 .cra_exit               = omap_sham_cra_exit,
1348         }
1349 },
1350 {
1351         .init           = omap_sham_init,
1352         .update         = omap_sham_update,
1353         .final          = omap_sham_final,
1354         .finup          = omap_sham_finup,
1355         .digest         = omap_sham_digest,
1356         .halg.digestsize        = MD5_DIGEST_SIZE,
1357         .halg.base      = {
1358                 .cra_name               = "md5",
1359                 .cra_driver_name        = "omap-md5",
1360                 .cra_priority           = 400,
1361                 .cra_flags              = CRYPTO_ALG_TYPE_AHASH |
1362                                                 CRYPTO_ALG_KERN_DRIVER_ONLY |
1363                                                 CRYPTO_ALG_ASYNC |
1364                                                 CRYPTO_ALG_NEED_FALLBACK,
1365                 .cra_blocksize          = SHA1_BLOCK_SIZE,
1366                 .cra_ctxsize            = sizeof(struct omap_sham_ctx),
1367                 .cra_alignmask          = OMAP_ALIGN_MASK,
1368                 .cra_module             = THIS_MODULE,
1369                 .cra_init               = omap_sham_cra_init,
1370                 .cra_exit               = omap_sham_cra_exit,
1371         }
1372 },
1373 {
1374         .init           = omap_sham_init,
1375         .update         = omap_sham_update,
1376         .final          = omap_sham_final,
1377         .finup          = omap_sham_finup,
1378         .digest         = omap_sham_digest,
1379         .setkey         = omap_sham_setkey,
1380         .halg.digestsize        = SHA1_DIGEST_SIZE,
1381         .halg.base      = {
1382                 .cra_name               = "hmac(sha1)",
1383                 .cra_driver_name        = "omap-hmac-sha1",
1384                 .cra_priority           = 400,
1385                 .cra_flags              = CRYPTO_ALG_TYPE_AHASH |
1386                                                 CRYPTO_ALG_KERN_DRIVER_ONLY |
1387                                                 CRYPTO_ALG_ASYNC |
1388                                                 CRYPTO_ALG_NEED_FALLBACK,
1389                 .cra_blocksize          = SHA1_BLOCK_SIZE,
1390                 .cra_ctxsize            = sizeof(struct omap_sham_ctx) +
1391                                         sizeof(struct omap_sham_hmac_ctx),
1392                 .cra_alignmask          = OMAP_ALIGN_MASK,
1393                 .cra_module             = THIS_MODULE,
1394                 .cra_init               = omap_sham_cra_sha1_init,
1395                 .cra_exit               = omap_sham_cra_exit,
1396         }
1397 },
1398 {
1399         .init           = omap_sham_init,
1400         .update         = omap_sham_update,
1401         .final          = omap_sham_final,
1402         .finup          = omap_sham_finup,
1403         .digest         = omap_sham_digest,
1404         .setkey         = omap_sham_setkey,
1405         .halg.digestsize        = MD5_DIGEST_SIZE,
1406         .halg.base      = {
1407                 .cra_name               = "hmac(md5)",
1408                 .cra_driver_name        = "omap-hmac-md5",
1409                 .cra_priority           = 400,
1410                 .cra_flags              = CRYPTO_ALG_TYPE_AHASH |
1411                                                 CRYPTO_ALG_KERN_DRIVER_ONLY |
1412                                                 CRYPTO_ALG_ASYNC |
1413                                                 CRYPTO_ALG_NEED_FALLBACK,
1414                 .cra_blocksize          = SHA1_BLOCK_SIZE,
1415                 .cra_ctxsize            = sizeof(struct omap_sham_ctx) +
1416                                         sizeof(struct omap_sham_hmac_ctx),
1417                 .cra_alignmask          = OMAP_ALIGN_MASK,
1418                 .cra_module             = THIS_MODULE,
1419                 .cra_init               = omap_sham_cra_md5_init,
1420                 .cra_exit               = omap_sham_cra_exit,
1421         }
1422 }
1423 };
1424 
1425 /* OMAP4 has some algs in addition to what OMAP2 has */
1426 static struct ahash_alg algs_sha224_sha256[] = {
1427 {
1428         .init           = omap_sham_init,
1429         .update         = omap_sham_update,
1430         .final          = omap_sham_final,
1431         .finup          = omap_sham_finup,
1432         .digest         = omap_sham_digest,
1433         .halg.digestsize        = SHA224_DIGEST_SIZE,
1434         .halg.base      = {
1435                 .cra_name               = "sha224",
1436                 .cra_driver_name        = "omap-sha224",
1437                 .cra_priority           = 400,
1438                 .cra_flags              = CRYPTO_ALG_TYPE_AHASH |
1439                                                 CRYPTO_ALG_ASYNC |
1440                                                 CRYPTO_ALG_NEED_FALLBACK,
1441                 .cra_blocksize          = SHA224_BLOCK_SIZE,
1442                 .cra_ctxsize            = sizeof(struct omap_sham_ctx),
1443                 .cra_alignmask          = 0,
1444                 .cra_module             = THIS_MODULE,
1445                 .cra_init               = omap_sham_cra_init,
1446                 .cra_exit               = omap_sham_cra_exit,
1447         }
1448 },
1449 {
1450         .init           = omap_sham_init,
1451         .update         = omap_sham_update,
1452         .final          = omap_sham_final,
1453         .finup          = omap_sham_finup,
1454         .digest         = omap_sham_digest,
1455         .halg.digestsize        = SHA256_DIGEST_SIZE,
1456         .halg.base      = {
1457                 .cra_name               = "sha256",
1458                 .cra_driver_name        = "omap-sha256",
1459                 .cra_priority           = 400,
1460                 .cra_flags              = CRYPTO_ALG_TYPE_AHASH |
1461                                                 CRYPTO_ALG_ASYNC |
1462                                                 CRYPTO_ALG_NEED_FALLBACK,
1463                 .cra_blocksize          = SHA256_BLOCK_SIZE,
1464                 .cra_ctxsize            = sizeof(struct omap_sham_ctx),
1465                 .cra_alignmask          = 0,
1466                 .cra_module             = THIS_MODULE,
1467                 .cra_init               = omap_sham_cra_init,
1468                 .cra_exit               = omap_sham_cra_exit,
1469         }
1470 },
1471 {
1472         .init           = omap_sham_init,
1473         .update         = omap_sham_update,
1474         .final          = omap_sham_final,
1475         .finup          = omap_sham_finup,
1476         .digest         = omap_sham_digest,
1477         .setkey         = omap_sham_setkey,
1478         .halg.digestsize        = SHA224_DIGEST_SIZE,
1479         .halg.base      = {
1480                 .cra_name               = "hmac(sha224)",
1481                 .cra_driver_name        = "omap-hmac-sha224",
1482                 .cra_priority           = 400,
1483                 .cra_flags              = CRYPTO_ALG_TYPE_AHASH |
1484                                                 CRYPTO_ALG_ASYNC |
1485                                                 CRYPTO_ALG_NEED_FALLBACK,
1486                 .cra_blocksize          = SHA224_BLOCK_SIZE,
1487                 .cra_ctxsize            = sizeof(struct omap_sham_ctx) +
1488                                         sizeof(struct omap_sham_hmac_ctx),
1489                 .cra_alignmask          = OMAP_ALIGN_MASK,
1490                 .cra_module             = THIS_MODULE,
1491                 .cra_init               = omap_sham_cra_sha224_init,
1492                 .cra_exit               = omap_sham_cra_exit,
1493         }
1494 },
1495 {
1496         .init           = omap_sham_init,
1497         .update         = omap_sham_update,
1498         .final          = omap_sham_final,
1499         .finup          = omap_sham_finup,
1500         .digest         = omap_sham_digest,
1501         .setkey         = omap_sham_setkey,
1502         .halg.digestsize        = SHA256_DIGEST_SIZE,
1503         .halg.base      = {
1504                 .cra_name               = "hmac(sha256)",
1505                 .cra_driver_name        = "omap-hmac-sha256",
1506                 .cra_priority           = 400,
1507                 .cra_flags              = CRYPTO_ALG_TYPE_AHASH |
1508                                                 CRYPTO_ALG_ASYNC |
1509                                                 CRYPTO_ALG_NEED_FALLBACK,
1510                 .cra_blocksize          = SHA256_BLOCK_SIZE,
1511                 .cra_ctxsize            = sizeof(struct omap_sham_ctx) +
1512                                         sizeof(struct omap_sham_hmac_ctx),
1513                 .cra_alignmask          = OMAP_ALIGN_MASK,
1514                 .cra_module             = THIS_MODULE,
1515                 .cra_init               = omap_sham_cra_sha256_init,
1516                 .cra_exit               = omap_sham_cra_exit,
1517         }
1518 },
1519 };
1520 
1521 static struct ahash_alg algs_sha384_sha512[] = {
1522 {
1523         .init           = omap_sham_init,
1524         .update         = omap_sham_update,
1525         .final          = omap_sham_final,
1526         .finup          = omap_sham_finup,
1527         .digest         = omap_sham_digest,
1528         .halg.digestsize        = SHA384_DIGEST_SIZE,
1529         .halg.base      = {
1530                 .cra_name               = "sha384",
1531                 .cra_driver_name        = "omap-sha384",
1532                 .cra_priority           = 400,
1533                 .cra_flags              = CRYPTO_ALG_TYPE_AHASH |
1534                                                 CRYPTO_ALG_ASYNC |
1535                                                 CRYPTO_ALG_NEED_FALLBACK,
1536                 .cra_blocksize          = SHA384_BLOCK_SIZE,
1537                 .cra_ctxsize            = sizeof(struct omap_sham_ctx),
1538                 .cra_alignmask          = 0,
1539                 .cra_module             = THIS_MODULE,
1540                 .cra_init               = omap_sham_cra_init,
1541                 .cra_exit               = omap_sham_cra_exit,
1542         }
1543 },
1544 {
1545         .init           = omap_sham_init,
1546         .update         = omap_sham_update,
1547         .final          = omap_sham_final,
1548         .finup          = omap_sham_finup,
1549         .digest         = omap_sham_digest,
1550         .halg.digestsize        = SHA512_DIGEST_SIZE,
1551         .halg.base      = {
1552                 .cra_name               = "sha512",
1553                 .cra_driver_name        = "omap-sha512",
1554                 .cra_priority           = 400,
1555                 .cra_flags              = CRYPTO_ALG_TYPE_AHASH |
1556                                                 CRYPTO_ALG_ASYNC |
1557                                                 CRYPTO_ALG_NEED_FALLBACK,
1558                 .cra_blocksize          = SHA512_BLOCK_SIZE,
1559                 .cra_ctxsize            = sizeof(struct omap_sham_ctx),
1560                 .cra_alignmask          = 0,
1561                 .cra_module             = THIS_MODULE,
1562                 .cra_init               = omap_sham_cra_init,
1563                 .cra_exit               = omap_sham_cra_exit,
1564         }
1565 },
1566 {
1567         .init           = omap_sham_init,
1568         .update         = omap_sham_update,
1569         .final          = omap_sham_final,
1570         .finup          = omap_sham_finup,
1571         .digest         = omap_sham_digest,
1572         .setkey         = omap_sham_setkey,
1573         .halg.digestsize        = SHA384_DIGEST_SIZE,
1574         .halg.base      = {
1575                 .cra_name               = "hmac(sha384)",
1576                 .cra_driver_name        = "omap-hmac-sha384",
1577                 .cra_priority           = 400,
1578                 .cra_flags              = CRYPTO_ALG_TYPE_AHASH |
1579                                                 CRYPTO_ALG_ASYNC |
1580                                                 CRYPTO_ALG_NEED_FALLBACK,
1581                 .cra_blocksize          = SHA384_BLOCK_SIZE,
1582                 .cra_ctxsize            = sizeof(struct omap_sham_ctx) +
1583                                         sizeof(struct omap_sham_hmac_ctx),
1584                 .cra_alignmask          = OMAP_ALIGN_MASK,
1585                 .cra_module             = THIS_MODULE,
1586                 .cra_init               = omap_sham_cra_sha384_init,
1587                 .cra_exit               = omap_sham_cra_exit,
1588         }
1589 },
1590 {
1591         .init           = omap_sham_init,
1592         .update         = omap_sham_update,
1593         .final          = omap_sham_final,
1594         .finup          = omap_sham_finup,
1595         .digest         = omap_sham_digest,
1596         .setkey         = omap_sham_setkey,
1597         .halg.digestsize        = SHA512_DIGEST_SIZE,
1598         .halg.base      = {
1599                 .cra_name               = "hmac(sha512)",
1600                 .cra_driver_name        = "omap-hmac-sha512",
1601                 .cra_priority           = 400,
1602                 .cra_flags              = CRYPTO_ALG_TYPE_AHASH |
1603                                                 CRYPTO_ALG_ASYNC |
1604                                                 CRYPTO_ALG_NEED_FALLBACK,
1605                 .cra_blocksize          = SHA512_BLOCK_SIZE,
1606                 .cra_ctxsize            = sizeof(struct omap_sham_ctx) +
1607                                         sizeof(struct omap_sham_hmac_ctx),
1608                 .cra_alignmask          = OMAP_ALIGN_MASK,
1609                 .cra_module             = THIS_MODULE,
1610                 .cra_init               = omap_sham_cra_sha512_init,
1611                 .cra_exit               = omap_sham_cra_exit,
1612         }
1613 },
1614 };
1615 
1616 static void omap_sham_done_task(unsigned long data)
1617 {
1618         struct omap_sham_dev *dd = (struct omap_sham_dev *)data;
1619         int err = 0;
1620 
1621         if (!test_bit(FLAGS_BUSY, &dd->flags)) {
1622                 omap_sham_handle_queue(dd, NULL);
1623                 return;
1624         }
1625 
1626         if (test_bit(FLAGS_CPU, &dd->flags)) {
1627                 if (test_and_clear_bit(FLAGS_OUTPUT_READY, &dd->flags)) {
1628                         /* hash or semi-hash ready */
1629                         err = omap_sham_update_cpu(dd);
1630                         if (err != -EINPROGRESS)
1631                                 goto finish;
1632                 }
1633         } else if (test_bit(FLAGS_DMA_READY, &dd->flags)) {
1634                 if (test_and_clear_bit(FLAGS_DMA_ACTIVE, &dd->flags)) {
1635                         omap_sham_update_dma_stop(dd);
1636                         if (dd->err) {
1637                                 err = dd->err;
1638                                 goto finish;
1639                         }
1640                 }
1641                 if (test_and_clear_bit(FLAGS_OUTPUT_READY, &dd->flags)) {
1642                         /* hash or semi-hash ready */
1643                         clear_bit(FLAGS_DMA_READY, &dd->flags);
1644                         err = omap_sham_update_dma_start(dd);
1645                         if (err != -EINPROGRESS)
1646                                 goto finish;
1647                 }
1648         }
1649 
1650         return;
1651 
1652 finish:
1653         dev_dbg(dd->dev, "update done: err: %d\n", err);
1654         /* finish curent request */
1655         omap_sham_finish_req(dd->req, err);
1656 }
1657 
1658 static irqreturn_t omap_sham_irq_common(struct omap_sham_dev *dd)
1659 {
1660         if (!test_bit(FLAGS_BUSY, &dd->flags)) {
1661                 dev_warn(dd->dev, "Interrupt when no active requests.\n");
1662         } else {
1663                 set_bit(FLAGS_OUTPUT_READY, &dd->flags);
1664                 tasklet_schedule(&dd->done_task);
1665         }
1666 
1667         return IRQ_HANDLED;
1668 }
1669 
1670 static irqreturn_t omap_sham_irq_omap2(int irq, void *dev_id)
1671 {
1672         struct omap_sham_dev *dd = dev_id;
1673 
1674         if (unlikely(test_bit(FLAGS_FINAL, &dd->flags)))
1675                 /* final -> allow device to go to power-saving mode */
1676                 omap_sham_write_mask(dd, SHA_REG_CTRL, 0, SHA_REG_CTRL_LENGTH);
1677 
1678         omap_sham_write_mask(dd, SHA_REG_CTRL, SHA_REG_CTRL_OUTPUT_READY,
1679                                  SHA_REG_CTRL_OUTPUT_READY);
1680         omap_sham_read(dd, SHA_REG_CTRL);
1681 
1682         return omap_sham_irq_common(dd);
1683 }
1684 
1685 static irqreturn_t omap_sham_irq_omap4(int irq, void *dev_id)
1686 {
1687         struct omap_sham_dev *dd = dev_id;
1688 
1689         omap_sham_write_mask(dd, SHA_REG_MASK(dd), 0, SHA_REG_MASK_IT_EN);
1690 
1691         return omap_sham_irq_common(dd);
1692 }
1693 
1694 static struct omap_sham_algs_info omap_sham_algs_info_omap2[] = {
1695         {
1696                 .algs_list      = algs_sha1_md5,
1697                 .size           = ARRAY_SIZE(algs_sha1_md5),
1698         },
1699 };
1700 
1701 static const struct omap_sham_pdata omap_sham_pdata_omap2 = {
1702         .algs_info      = omap_sham_algs_info_omap2,
1703         .algs_info_size = ARRAY_SIZE(omap_sham_algs_info_omap2),
1704         .flags          = BIT(FLAGS_BE32_SHA1),
1705         .digest_size    = SHA1_DIGEST_SIZE,
1706         .copy_hash      = omap_sham_copy_hash_omap2,
1707         .write_ctrl     = omap_sham_write_ctrl_omap2,
1708         .trigger        = omap_sham_trigger_omap2,
1709         .poll_irq       = omap_sham_poll_irq_omap2,
1710         .intr_hdlr      = omap_sham_irq_omap2,
1711         .idigest_ofs    = 0x00,
1712         .din_ofs        = 0x1c,
1713         .digcnt_ofs     = 0x14,
1714         .rev_ofs        = 0x5c,
1715         .mask_ofs       = 0x60,
1716         .sysstatus_ofs  = 0x64,
1717         .major_mask     = 0xf0,
1718         .major_shift    = 4,
1719         .minor_mask     = 0x0f,
1720         .minor_shift    = 0,
1721 };
1722 
1723 #ifdef CONFIG_OF
1724 static struct omap_sham_algs_info omap_sham_algs_info_omap4[] = {
1725         {
1726                 .algs_list      = algs_sha1_md5,
1727                 .size           = ARRAY_SIZE(algs_sha1_md5),
1728         },
1729         {
1730                 .algs_list      = algs_sha224_sha256,
1731                 .size           = ARRAY_SIZE(algs_sha224_sha256),
1732         },
1733 };
1734 
1735 static const struct omap_sham_pdata omap_sham_pdata_omap4 = {
1736         .algs_info      = omap_sham_algs_info_omap4,
1737         .algs_info_size = ARRAY_SIZE(omap_sham_algs_info_omap4),
1738         .flags          = BIT(FLAGS_AUTO_XOR),
1739         .digest_size    = SHA256_DIGEST_SIZE,
1740         .copy_hash      = omap_sham_copy_hash_omap4,
1741         .write_ctrl     = omap_sham_write_ctrl_omap4,
1742         .trigger        = omap_sham_trigger_omap4,
1743         .poll_irq       = omap_sham_poll_irq_omap4,
1744         .intr_hdlr      = omap_sham_irq_omap4,
1745         .idigest_ofs    = 0x020,
1746         .odigest_ofs    = 0x0,
1747         .din_ofs        = 0x080,
1748         .digcnt_ofs     = 0x040,
1749         .rev_ofs        = 0x100,
1750         .mask_ofs       = 0x110,
1751         .sysstatus_ofs  = 0x114,
1752         .mode_ofs       = 0x44,
1753         .length_ofs     = 0x48,
1754         .major_mask     = 0x0700,
1755         .major_shift    = 8,
1756         .minor_mask     = 0x003f,
1757         .minor_shift    = 0,
1758 };
1759 
1760 static struct omap_sham_algs_info omap_sham_algs_info_omap5[] = {
1761         {
1762                 .algs_list      = algs_sha1_md5,
1763                 .size           = ARRAY_SIZE(algs_sha1_md5),
1764         },
1765         {
1766                 .algs_list      = algs_sha224_sha256,
1767                 .size           = ARRAY_SIZE(algs_sha224_sha256),
1768         },
1769         {
1770                 .algs_list      = algs_sha384_sha512,
1771                 .size           = ARRAY_SIZE(algs_sha384_sha512),
1772         },
1773 };
1774 
1775 static const struct omap_sham_pdata omap_sham_pdata_omap5 = {
1776         .algs_info      = omap_sham_algs_info_omap5,
1777         .algs_info_size = ARRAY_SIZE(omap_sham_algs_info_omap5),
1778         .flags          = BIT(FLAGS_AUTO_XOR),
1779         .digest_size    = SHA512_DIGEST_SIZE,
1780         .copy_hash      = omap_sham_copy_hash_omap4,
1781         .write_ctrl     = omap_sham_write_ctrl_omap4,
1782         .trigger        = omap_sham_trigger_omap4,
1783         .poll_irq       = omap_sham_poll_irq_omap4,
1784         .intr_hdlr      = omap_sham_irq_omap4,
1785         .idigest_ofs    = 0x240,
1786         .odigest_ofs    = 0x200,
1787         .din_ofs        = 0x080,
1788         .digcnt_ofs     = 0x280,
1789         .rev_ofs        = 0x100,
1790         .mask_ofs       = 0x110,
1791         .sysstatus_ofs  = 0x114,
1792         .mode_ofs       = 0x284,
1793         .length_ofs     = 0x288,
1794         .major_mask     = 0x0700,
1795         .major_shift    = 8,
1796         .minor_mask     = 0x003f,
1797         .minor_shift    = 0,
1798 };
1799 
1800 static const struct of_device_id omap_sham_of_match[] = {
1801         {
1802                 .compatible     = "ti,omap2-sham",
1803                 .data           = &omap_sham_pdata_omap2,
1804         },
1805         {
1806                 .compatible     = "ti,omap3-sham",
1807                 .data           = &omap_sham_pdata_omap2,
1808         },
1809         {
1810                 .compatible     = "ti,omap4-sham",
1811                 .data           = &omap_sham_pdata_omap4,
1812         },
1813         {
1814                 .compatible     = "ti,omap5-sham",
1815                 .data           = &omap_sham_pdata_omap5,
1816         },
1817         {},
1818 };
1819 MODULE_DEVICE_TABLE(of, omap_sham_of_match);
1820 
1821 static int omap_sham_get_res_of(struct omap_sham_dev *dd,
1822                 struct device *dev, struct resource *res)
1823 {
1824         struct device_node *node = dev->of_node;
1825         const struct of_device_id *match;
1826         int err = 0;
1827 
1828         match = of_match_device(of_match_ptr(omap_sham_of_match), dev);
1829         if (!match) {
1830                 dev_err(dev, "no compatible OF match\n");
1831                 err = -EINVAL;
1832                 goto err;
1833         }
1834 
1835         err = of_address_to_resource(node, 0, res);
1836         if (err < 0) {
1837                 dev_err(dev, "can't translate OF node address\n");
1838                 err = -EINVAL;
1839                 goto err;
1840         }
1841 
1842         dd->irq = irq_of_parse_and_map(node, 0);
1843         if (!dd->irq) {
1844                 dev_err(dev, "can't translate OF irq value\n");
1845                 err = -EINVAL;
1846                 goto err;
1847         }
1848 
1849         dd->pdata = match->data;
1850 
1851 err:
1852         return err;
1853 }
1854 #else
1855 static const struct of_device_id omap_sham_of_match[] = {
1856         {},
1857 };
1858 
1859 static int omap_sham_get_res_of(struct omap_sham_dev *dd,
1860                 struct device *dev, struct resource *res)
1861 {
1862         return -EINVAL;
1863 }
1864 #endif
1865 
1866 static int omap_sham_get_res_pdev(struct omap_sham_dev *dd,
1867                 struct platform_device *pdev, struct resource *res)
1868 {
1869         struct device *dev = &pdev->dev;
1870         struct resource *r;
1871         int err = 0;
1872 
1873         /* Get the base address */
1874         r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1875         if (!r) {
1876                 dev_err(dev, "no MEM resource info\n");
1877                 err = -ENODEV;
1878                 goto err;
1879         }
1880         memcpy(res, r, sizeof(*res));
1881 
1882         /* Get the IRQ */
1883         dd->irq = platform_get_irq(pdev, 0);
1884         if (dd->irq < 0) {
1885                 dev_err(dev, "no IRQ resource info\n");
1886                 err = dd->irq;
1887                 goto err;
1888         }
1889 
1890         /* Only OMAP2/3 can be non-DT */
1891         dd->pdata = &omap_sham_pdata_omap2;
1892 
1893 err:
1894         return err;
1895 }
1896 
1897 static int omap_sham_probe(struct platform_device *pdev)
1898 {
1899         struct omap_sham_dev *dd;
1900         struct device *dev = &pdev->dev;
1901         struct resource res;
1902         dma_cap_mask_t mask;
1903         int err, i, j;
1904         u32 rev;
1905 
1906         dd = devm_kzalloc(dev, sizeof(struct omap_sham_dev), GFP_KERNEL);
1907         if (dd == NULL) {
1908                 dev_err(dev, "unable to alloc data struct.\n");
1909                 err = -ENOMEM;
1910                 goto data_err;
1911         }
1912         dd->dev = dev;
1913         platform_set_drvdata(pdev, dd);
1914 
1915         INIT_LIST_HEAD(&dd->list);
1916         spin_lock_init(&dd->lock);
1917         tasklet_init(&dd->done_task, omap_sham_done_task, (unsigned long)dd);
1918         crypto_init_queue(&dd->queue, OMAP_SHAM_QUEUE_LENGTH);
1919 
1920         err = (dev->of_node) ? omap_sham_get_res_of(dd, dev, &res) :
1921                                omap_sham_get_res_pdev(dd, pdev, &res);
1922         if (err)
1923                 goto data_err;
1924 
1925         dd->io_base = devm_ioremap_resource(dev, &res);
1926         if (IS_ERR(dd->io_base)) {
1927                 err = PTR_ERR(dd->io_base);
1928                 goto data_err;
1929         }
1930         dd->phys_base = res.start;
1931 
1932         err = devm_request_irq(dev, dd->irq, dd->pdata->intr_hdlr,
1933                                IRQF_TRIGGER_NONE, dev_name(dev), dd);
1934         if (err) {
1935                 dev_err(dev, "unable to request irq %d, err = %d\n",
1936                         dd->irq, err);
1937                 goto data_err;
1938         }
1939 
1940         dma_cap_zero(mask);
1941         dma_cap_set(DMA_SLAVE, mask);
1942 
1943         dd->dma_lch = dma_request_chan(dev, "rx");
1944         if (IS_ERR(dd->dma_lch)) {
1945                 err = PTR_ERR(dd->dma_lch);
1946                 if (err == -EPROBE_DEFER)
1947                         goto data_err;
1948 
1949                 dd->polling_mode = 1;
1950                 dev_dbg(dev, "using polling mode instead of dma\n");
1951         }
1952 
1953         dd->flags |= dd->pdata->flags;
1954 
1955         pm_runtime_use_autosuspend(dev);
1956         pm_runtime_set_autosuspend_delay(dev, DEFAULT_AUTOSUSPEND_DELAY);
1957 
1958         pm_runtime_enable(dev);
1959         pm_runtime_irq_safe(dev);
1960 
1961         err = pm_runtime_get_sync(dev);
1962         if (err < 0) {
1963                 dev_err(dev, "failed to get sync: %d\n", err);
1964                 goto err_pm;
1965         }
1966 
1967         rev = omap_sham_read(dd, SHA_REG_REV(dd));
1968         pm_runtime_put_sync(&pdev->dev);
1969 
1970         dev_info(dev, "hw accel on OMAP rev %u.%u\n",
1971                 (rev & dd->pdata->major_mask) >> dd->pdata->major_shift,
1972                 (rev & dd->pdata->minor_mask) >> dd->pdata->minor_shift);
1973 
1974         spin_lock(&sham.lock);
1975         list_add_tail(&dd->list, &sham.dev_list);
1976         spin_unlock(&sham.lock);
1977 
1978         for (i = 0; i < dd->pdata->algs_info_size; i++) {
1979                 for (j = 0; j < dd->pdata->algs_info[i].size; j++) {
1980                         err = crypto_register_ahash(
1981                                         &dd->pdata->algs_info[i].algs_list[j]);
1982                         if (err)
1983                                 goto err_algs;
1984 
1985                         dd->pdata->algs_info[i].registered++;
1986                 }
1987         }
1988 
1989         return 0;
1990 
1991 err_algs:
1992         for (i = dd->pdata->algs_info_size - 1; i >= 0; i--)
1993                 for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--)
1994                         crypto_unregister_ahash(
1995                                         &dd->pdata->algs_info[i].algs_list[j]);
1996 err_pm:
1997         pm_runtime_disable(dev);
1998         if (!dd->polling_mode)
1999                 dma_release_channel(dd->dma_lch);
2000 data_err:
2001         dev_err(dev, "initialization failed.\n");
2002 
2003         return err;
2004 }
2005 
2006 static int omap_sham_remove(struct platform_device *pdev)
2007 {
2008         static struct omap_sham_dev *dd;
2009         int i, j;
2010 
2011         dd = platform_get_drvdata(pdev);
2012         if (!dd)
2013                 return -ENODEV;
2014         spin_lock(&sham.lock);
2015         list_del(&dd->list);
2016         spin_unlock(&sham.lock);
2017         for (i = dd->pdata->algs_info_size - 1; i >= 0; i--)
2018                 for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--)
2019                         crypto_unregister_ahash(
2020                                         &dd->pdata->algs_info[i].algs_list[j]);
2021         tasklet_kill(&dd->done_task);
2022         pm_runtime_disable(&pdev->dev);
2023 
2024         if (!dd->polling_mode)
2025                 dma_release_channel(dd->dma_lch);
2026 
2027         return 0;
2028 }
2029 
2030 #ifdef CONFIG_PM_SLEEP
2031 static int omap_sham_suspend(struct device *dev)
2032 {
2033         pm_runtime_put_sync(dev);
2034         return 0;
2035 }
2036 
2037 static int omap_sham_resume(struct device *dev)
2038 {
2039         int err = pm_runtime_get_sync(dev);
2040         if (err < 0) {
2041                 dev_err(dev, "failed to get sync: %d\n", err);
2042                 return err;
2043         }
2044         return 0;
2045 }
2046 #endif
2047 
2048 static SIMPLE_DEV_PM_OPS(omap_sham_pm_ops, omap_sham_suspend, omap_sham_resume);
2049 
2050 static struct platform_driver omap_sham_driver = {
2051         .probe  = omap_sham_probe,
2052         .remove = omap_sham_remove,
2053         .driver = {
2054                 .name   = "omap-sham",
2055                 .pm     = &omap_sham_pm_ops,
2056                 .of_match_table = omap_sham_of_match,
2057         },
2058 };
2059 
2060 module_platform_driver(omap_sham_driver);
2061 
2062 MODULE_DESCRIPTION("OMAP SHA1/MD5 hw acceleration support.");
2063 MODULE_LICENSE("GPL v2");
2064 MODULE_AUTHOR("Dmitry Kasatkin");
2065 MODULE_ALIAS("platform:omap-sham");
2066 

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