Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
[linux-2.6.git] / drivers / crypto / talitos.c
1 /*
2  * talitos - Freescale Integrated Security Engine (SEC) device driver
3  *
4  * Copyright (c) 2008-2010 Freescale Semiconductor, Inc.
5  *
6  * Scatterlist Crypto API glue code copied from files with the following:
7  * Copyright (c) 2006-2007 Herbert Xu <herbert@gondor.apana.org.au>
8  *
9  * Crypto algorithm registration code copied from hifn driver:
10  * 2007+ Copyright (c) Evgeniy Polyakov <johnpol@2ka.mipt.ru>
11  * All rights reserved.
12  *
13  * This program is free software; you can redistribute it and/or modify
14  * it under the terms of the GNU General Public License as published by
15  * the Free Software Foundation; either version 2 of the License, or
16  * (at your option) any later version.
17  *
18  * This program is distributed in the hope that it will be useful,
19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
21  * GNU General Public License for more details.
22  *
23  * You should have received a copy of the GNU General Public License
24  * along with this program; if not, write to the Free Software
25  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
26  */
27
28 #include <linux/kernel.h>
29 #include <linux/module.h>
30 #include <linux/mod_devicetable.h>
31 #include <linux/device.h>
32 #include <linux/interrupt.h>
33 #include <linux/crypto.h>
34 #include <linux/hw_random.h>
35 #include <linux/of_platform.h>
36 #include <linux/dma-mapping.h>
37 #include <linux/io.h>
38 #include <linux/spinlock.h>
39 #include <linux/rtnetlink.h>
40 #include <linux/slab.h>
41
42 #include <crypto/algapi.h>
43 #include <crypto/aes.h>
44 #include <crypto/des.h>
45 #include <crypto/sha.h>
46 #include <crypto/md5.h>
47 #include <crypto/aead.h>
48 #include <crypto/authenc.h>
49 #include <crypto/skcipher.h>
50 #include <crypto/hash.h>
51 #include <crypto/internal/hash.h>
52 #include <crypto/scatterwalk.h>
53
54 #include "talitos.h"
55
56 #define TALITOS_TIMEOUT 100000
57 #define TALITOS_MAX_DATA_LEN 65535
58
59 #define DESC_TYPE(desc_hdr) ((be32_to_cpu(desc_hdr) >> 3) & 0x1f)
60 #define PRIMARY_EU(desc_hdr) ((be32_to_cpu(desc_hdr) >> 28) & 0xf)
61 #define SECONDARY_EU(desc_hdr) ((be32_to_cpu(desc_hdr) >> 16) & 0xf)
62
63 /* descriptor pointer entry */
64 struct talitos_ptr {
65         __be16 len;     /* length */
66         u8 j_extent;    /* jump to sg link table and/or extent */
67         u8 eptr;        /* extended address */
68         __be32 ptr;     /* address */
69 };
70
71 static const struct talitos_ptr zero_entry = {
72         .len = 0,
73         .j_extent = 0,
74         .eptr = 0,
75         .ptr = 0
76 };
77
78 /* descriptor */
79 struct talitos_desc {
80         __be32 hdr;                     /* header high bits */
81         __be32 hdr_lo;                  /* header low bits */
82         struct talitos_ptr ptr[7];      /* ptr/len pair array */
83 };
84
85 /**
86  * talitos_request - descriptor submission request
87  * @desc: descriptor pointer (kernel virtual)
88  * @dma_desc: descriptor's physical bus address
89  * @callback: whom to call when descriptor processing is done
90  * @context: caller context (optional)
91  */
92 struct talitos_request {
93         struct talitos_desc *desc;
94         dma_addr_t dma_desc;
95         void (*callback) (struct device *dev, struct talitos_desc *desc,
96                           void *context, int error);
97         void *context;
98 };
99
100 /* per-channel fifo management */
101 struct talitos_channel {
102         /* request fifo */
103         struct talitos_request *fifo;
104
105         /* number of requests pending in channel h/w fifo */
106         atomic_t submit_count ____cacheline_aligned;
107
108         /* request submission (head) lock */
109         spinlock_t head_lock ____cacheline_aligned;
110         /* index to next free descriptor request */
111         int head;
112
113         /* request release (tail) lock */
114         spinlock_t tail_lock ____cacheline_aligned;
115         /* index to next in-progress/done descriptor request */
116         int tail;
117 };
118
119 struct talitos_private {
120         struct device *dev;
121         struct of_device *ofdev;
122         void __iomem *reg;
123         int irq;
124
125         /* SEC version geometry (from device tree node) */
126         unsigned int num_channels;
127         unsigned int chfifo_len;
128         unsigned int exec_units;
129         unsigned int desc_types;
130
131         /* SEC Compatibility info */
132         unsigned long features;
133
134         /*
135          * length of the request fifo
136          * fifo_len is chfifo_len rounded up to next power of 2
137          * so we can use bitwise ops to wrap
138          */
139         unsigned int fifo_len;
140
141         struct talitos_channel *chan;
142
143         /* next channel to be assigned next incoming descriptor */
144         atomic_t last_chan ____cacheline_aligned;
145
146         /* request callback tasklet */
147         struct tasklet_struct done_task;
148
149         /* list of registered algorithms */
150         struct list_head alg_list;
151
152         /* hwrng device */
153         struct hwrng rng;
154 };
155
156 /* .features flag */
157 #define TALITOS_FTR_SRC_LINK_TBL_LEN_INCLUDES_EXTENT 0x00000001
158 #define TALITOS_FTR_HW_AUTH_CHECK 0x00000002
159 #define TALITOS_FTR_SHA224_HWINIT 0x00000004
160
161 static void to_talitos_ptr(struct talitos_ptr *talitos_ptr, dma_addr_t dma_addr)
162 {
163         talitos_ptr->ptr = cpu_to_be32(lower_32_bits(dma_addr));
164         talitos_ptr->eptr = cpu_to_be32(upper_32_bits(dma_addr));
165 }
166
167 /*
168  * map virtual single (contiguous) pointer to h/w descriptor pointer
169  */
170 static void map_single_talitos_ptr(struct device *dev,
171                                    struct talitos_ptr *talitos_ptr,
172                                    unsigned short len, void *data,
173                                    unsigned char extent,
174                                    enum dma_data_direction dir)
175 {
176         dma_addr_t dma_addr = dma_map_single(dev, data, len, dir);
177
178         talitos_ptr->len = cpu_to_be16(len);
179         to_talitos_ptr(talitos_ptr, dma_addr);
180         talitos_ptr->j_extent = extent;
181 }
182
183 /*
184  * unmap bus single (contiguous) h/w descriptor pointer
185  */
186 static void unmap_single_talitos_ptr(struct device *dev,
187                                      struct talitos_ptr *talitos_ptr,
188                                      enum dma_data_direction dir)
189 {
190         dma_unmap_single(dev, be32_to_cpu(talitos_ptr->ptr),
191                          be16_to_cpu(talitos_ptr->len), dir);
192 }
193
194 static int reset_channel(struct device *dev, int ch)
195 {
196         struct talitos_private *priv = dev_get_drvdata(dev);
197         unsigned int timeout = TALITOS_TIMEOUT;
198
199         setbits32(priv->reg + TALITOS_CCCR(ch), TALITOS_CCCR_RESET);
200
201         while ((in_be32(priv->reg + TALITOS_CCCR(ch)) & TALITOS_CCCR_RESET)
202                && --timeout)
203                 cpu_relax();
204
205         if (timeout == 0) {
206                 dev_err(dev, "failed to reset channel %d\n", ch);
207                 return -EIO;
208         }
209
210         /* set 36-bit addressing, done writeback enable and done IRQ enable */
211         setbits32(priv->reg + TALITOS_CCCR_LO(ch), TALITOS_CCCR_LO_EAE |
212                   TALITOS_CCCR_LO_CDWE | TALITOS_CCCR_LO_CDIE);
213
214         /* and ICCR writeback, if available */
215         if (priv->features & TALITOS_FTR_HW_AUTH_CHECK)
216                 setbits32(priv->reg + TALITOS_CCCR_LO(ch),
217                           TALITOS_CCCR_LO_IWSE);
218
219         return 0;
220 }
221
222 static int reset_device(struct device *dev)
223 {
224         struct talitos_private *priv = dev_get_drvdata(dev);
225         unsigned int timeout = TALITOS_TIMEOUT;
226
227         setbits32(priv->reg + TALITOS_MCR, TALITOS_MCR_SWR);
228
229         while ((in_be32(priv->reg + TALITOS_MCR) & TALITOS_MCR_SWR)
230                && --timeout)
231                 cpu_relax();
232
233         if (timeout == 0) {
234                 dev_err(dev, "failed to reset device\n");
235                 return -EIO;
236         }
237
238         return 0;
239 }
240
241 /*
242  * Reset and initialize the device
243  */
244 static int init_device(struct device *dev)
245 {
246         struct talitos_private *priv = dev_get_drvdata(dev);
247         int ch, err;
248
249         /*
250          * Master reset
251          * errata documentation: warning: certain SEC interrupts
252          * are not fully cleared by writing the MCR:SWR bit,
253          * set bit twice to completely reset
254          */
255         err = reset_device(dev);
256         if (err)
257                 return err;
258
259         err = reset_device(dev);
260         if (err)
261                 return err;
262
263         /* reset channels */
264         for (ch = 0; ch < priv->num_channels; ch++) {
265                 err = reset_channel(dev, ch);
266                 if (err)
267                         return err;
268         }
269
270         /* enable channel done and error interrupts */
271         setbits32(priv->reg + TALITOS_IMR, TALITOS_IMR_INIT);
272         setbits32(priv->reg + TALITOS_IMR_LO, TALITOS_IMR_LO_INIT);
273
274         /* disable integrity check error interrupts (use writeback instead) */
275         if (priv->features & TALITOS_FTR_HW_AUTH_CHECK)
276                 setbits32(priv->reg + TALITOS_MDEUICR_LO,
277                           TALITOS_MDEUICR_LO_ICE);
278
279         return 0;
280 }
281
282 /**
283  * talitos_submit - submits a descriptor to the device for processing
284  * @dev:        the SEC device to be used
285  * @desc:       the descriptor to be processed by the device
286  * @callback:   whom to call when processing is complete
287  * @context:    a handle for use by caller (optional)
288  *
289  * desc must contain valid dma-mapped (bus physical) address pointers.
290  * callback must check err and feedback in descriptor header
291  * for device processing status.
292  */
293 static int talitos_submit(struct device *dev, struct talitos_desc *desc,
294                           void (*callback)(struct device *dev,
295                                            struct talitos_desc *desc,
296                                            void *context, int error),
297                           void *context)
298 {
299         struct talitos_private *priv = dev_get_drvdata(dev);
300         struct talitos_request *request;
301         unsigned long flags, ch;
302         int head;
303
304         /* select done notification */
305         desc->hdr |= DESC_HDR_DONE_NOTIFY;
306
307         /* emulate SEC's round-robin channel fifo polling scheme */
308         ch = atomic_inc_return(&priv->last_chan) & (priv->num_channels - 1);
309
310         spin_lock_irqsave(&priv->chan[ch].head_lock, flags);
311
312         if (!atomic_inc_not_zero(&priv->chan[ch].submit_count)) {
313                 /* h/w fifo is full */
314                 spin_unlock_irqrestore(&priv->chan[ch].head_lock, flags);
315                 return -EAGAIN;
316         }
317
318         head = priv->chan[ch].head;
319         request = &priv->chan[ch].fifo[head];
320
321         /* map descriptor and save caller data */
322         request->dma_desc = dma_map_single(dev, desc, sizeof(*desc),
323                                            DMA_BIDIRECTIONAL);
324         request->callback = callback;
325         request->context = context;
326
327         /* increment fifo head */
328         priv->chan[ch].head = (priv->chan[ch].head + 1) & (priv->fifo_len - 1);
329
330         smp_wmb();
331         request->desc = desc;
332
333         /* GO! */
334         wmb();
335         out_be32(priv->reg + TALITOS_FF(ch),
336                  cpu_to_be32(upper_32_bits(request->dma_desc)));
337         out_be32(priv->reg + TALITOS_FF_LO(ch),
338                  cpu_to_be32(lower_32_bits(request->dma_desc)));
339
340         spin_unlock_irqrestore(&priv->chan[ch].head_lock, flags);
341
342         return -EINPROGRESS;
343 }
344
345 /*
346  * process what was done, notify callback of error if not
347  */
348 static void flush_channel(struct device *dev, int ch, int error, int reset_ch)
349 {
350         struct talitos_private *priv = dev_get_drvdata(dev);
351         struct talitos_request *request, saved_req;
352         unsigned long flags;
353         int tail, status;
354
355         spin_lock_irqsave(&priv->chan[ch].tail_lock, flags);
356
357         tail = priv->chan[ch].tail;
358         while (priv->chan[ch].fifo[tail].desc) {
359                 request = &priv->chan[ch].fifo[tail];
360
361                 /* descriptors with their done bits set don't get the error */
362                 rmb();
363                 if ((request->desc->hdr & DESC_HDR_DONE) == DESC_HDR_DONE)
364                         status = 0;
365                 else
366                         if (!error)
367                                 break;
368                         else
369                                 status = error;
370
371                 dma_unmap_single(dev, request->dma_desc,
372                                  sizeof(struct talitos_desc),
373                                  DMA_BIDIRECTIONAL);
374
375                 /* copy entries so we can call callback outside lock */
376                 saved_req.desc = request->desc;
377                 saved_req.callback = request->callback;
378                 saved_req.context = request->context;
379
380                 /* release request entry in fifo */
381                 smp_wmb();
382                 request->desc = NULL;
383
384                 /* increment fifo tail */
385                 priv->chan[ch].tail = (tail + 1) & (priv->fifo_len - 1);
386
387                 spin_unlock_irqrestore(&priv->chan[ch].tail_lock, flags);
388
389                 atomic_dec(&priv->chan[ch].submit_count);
390
391                 saved_req.callback(dev, saved_req.desc, saved_req.context,
392                                    status);
393                 /* channel may resume processing in single desc error case */
394                 if (error && !reset_ch && status == error)
395                         return;
396                 spin_lock_irqsave(&priv->chan[ch].tail_lock, flags);
397                 tail = priv->chan[ch].tail;
398         }
399
400         spin_unlock_irqrestore(&priv->chan[ch].tail_lock, flags);
401 }
402
403 /*
404  * process completed requests for channels that have done status
405  */
406 static void talitos_done(unsigned long data)
407 {
408         struct device *dev = (struct device *)data;
409         struct talitos_private *priv = dev_get_drvdata(dev);
410         int ch;
411
412         for (ch = 0; ch < priv->num_channels; ch++)
413                 flush_channel(dev, ch, 0, 0);
414
415         /* At this point, all completed channels have been processed.
416          * Unmask done interrupts for channels completed later on.
417          */
418         setbits32(priv->reg + TALITOS_IMR, TALITOS_IMR_INIT);
419         setbits32(priv->reg + TALITOS_IMR_LO, TALITOS_IMR_LO_INIT);
420 }
421
422 /*
423  * locate current (offending) descriptor
424  */
425 static struct talitos_desc *current_desc(struct device *dev, int ch)
426 {
427         struct talitos_private *priv = dev_get_drvdata(dev);
428         int tail = priv->chan[ch].tail;
429         dma_addr_t cur_desc;
430
431         cur_desc = in_be32(priv->reg + TALITOS_CDPR_LO(ch));
432
433         while (priv->chan[ch].fifo[tail].dma_desc != cur_desc) {
434                 tail = (tail + 1) & (priv->fifo_len - 1);
435                 if (tail == priv->chan[ch].tail) {
436                         dev_err(dev, "couldn't locate current descriptor\n");
437                         return NULL;
438                 }
439         }
440
441         return priv->chan[ch].fifo[tail].desc;
442 }
443
444 /*
445  * user diagnostics; report root cause of error based on execution unit status
446  */
447 static void report_eu_error(struct device *dev, int ch,
448                             struct talitos_desc *desc)
449 {
450         struct talitos_private *priv = dev_get_drvdata(dev);
451         int i;
452
453         switch (desc->hdr & DESC_HDR_SEL0_MASK) {
454         case DESC_HDR_SEL0_AFEU:
455                 dev_err(dev, "AFEUISR 0x%08x_%08x\n",
456                         in_be32(priv->reg + TALITOS_AFEUISR),
457                         in_be32(priv->reg + TALITOS_AFEUISR_LO));
458                 break;
459         case DESC_HDR_SEL0_DEU:
460                 dev_err(dev, "DEUISR 0x%08x_%08x\n",
461                         in_be32(priv->reg + TALITOS_DEUISR),
462                         in_be32(priv->reg + TALITOS_DEUISR_LO));
463                 break;
464         case DESC_HDR_SEL0_MDEUA:
465         case DESC_HDR_SEL0_MDEUB:
466                 dev_err(dev, "MDEUISR 0x%08x_%08x\n",
467                         in_be32(priv->reg + TALITOS_MDEUISR),
468                         in_be32(priv->reg + TALITOS_MDEUISR_LO));
469                 break;
470         case DESC_HDR_SEL0_RNG:
471                 dev_err(dev, "RNGUISR 0x%08x_%08x\n",
472                         in_be32(priv->reg + TALITOS_RNGUISR),
473                         in_be32(priv->reg + TALITOS_RNGUISR_LO));
474                 break;
475         case DESC_HDR_SEL0_PKEU:
476                 dev_err(dev, "PKEUISR 0x%08x_%08x\n",
477                         in_be32(priv->reg + TALITOS_PKEUISR),
478                         in_be32(priv->reg + TALITOS_PKEUISR_LO));
479                 break;
480         case DESC_HDR_SEL0_AESU:
481                 dev_err(dev, "AESUISR 0x%08x_%08x\n",
482                         in_be32(priv->reg + TALITOS_AESUISR),
483                         in_be32(priv->reg + TALITOS_AESUISR_LO));
484                 break;
485         case DESC_HDR_SEL0_CRCU:
486                 dev_err(dev, "CRCUISR 0x%08x_%08x\n",
487                         in_be32(priv->reg + TALITOS_CRCUISR),
488                         in_be32(priv->reg + TALITOS_CRCUISR_LO));
489                 break;
490         case DESC_HDR_SEL0_KEU:
491                 dev_err(dev, "KEUISR 0x%08x_%08x\n",
492                         in_be32(priv->reg + TALITOS_KEUISR),
493                         in_be32(priv->reg + TALITOS_KEUISR_LO));
494                 break;
495         }
496
497         switch (desc->hdr & DESC_HDR_SEL1_MASK) {
498         case DESC_HDR_SEL1_MDEUA:
499         case DESC_HDR_SEL1_MDEUB:
500                 dev_err(dev, "MDEUISR 0x%08x_%08x\n",
501                         in_be32(priv->reg + TALITOS_MDEUISR),
502                         in_be32(priv->reg + TALITOS_MDEUISR_LO));
503                 break;
504         case DESC_HDR_SEL1_CRCU:
505                 dev_err(dev, "CRCUISR 0x%08x_%08x\n",
506                         in_be32(priv->reg + TALITOS_CRCUISR),
507                         in_be32(priv->reg + TALITOS_CRCUISR_LO));
508                 break;
509         }
510
511         for (i = 0; i < 8; i++)
512                 dev_err(dev, "DESCBUF 0x%08x_%08x\n",
513                         in_be32(priv->reg + TALITOS_DESCBUF(ch) + 8*i),
514                         in_be32(priv->reg + TALITOS_DESCBUF_LO(ch) + 8*i));
515 }
516
517 /*
518  * recover from error interrupts
519  */
520 static void talitos_error(unsigned long data, u32 isr, u32 isr_lo)
521 {
522         struct device *dev = (struct device *)data;
523         struct talitos_private *priv = dev_get_drvdata(dev);
524         unsigned int timeout = TALITOS_TIMEOUT;
525         int ch, error, reset_dev = 0, reset_ch = 0;
526         u32 v, v_lo;
527
528         for (ch = 0; ch < priv->num_channels; ch++) {
529                 /* skip channels without errors */
530                 if (!(isr & (1 << (ch * 2 + 1))))
531                         continue;
532
533                 error = -EINVAL;
534
535                 v = in_be32(priv->reg + TALITOS_CCPSR(ch));
536                 v_lo = in_be32(priv->reg + TALITOS_CCPSR_LO(ch));
537
538                 if (v_lo & TALITOS_CCPSR_LO_DOF) {
539                         dev_err(dev, "double fetch fifo overflow error\n");
540                         error = -EAGAIN;
541                         reset_ch = 1;
542                 }
543                 if (v_lo & TALITOS_CCPSR_LO_SOF) {
544                         /* h/w dropped descriptor */
545                         dev_err(dev, "single fetch fifo overflow error\n");
546                         error = -EAGAIN;
547                 }
548                 if (v_lo & TALITOS_CCPSR_LO_MDTE)
549                         dev_err(dev, "master data transfer error\n");
550                 if (v_lo & TALITOS_CCPSR_LO_SGDLZ)
551                         dev_err(dev, "s/g data length zero error\n");
552                 if (v_lo & TALITOS_CCPSR_LO_FPZ)
553                         dev_err(dev, "fetch pointer zero error\n");
554                 if (v_lo & TALITOS_CCPSR_LO_IDH)
555                         dev_err(dev, "illegal descriptor header error\n");
556                 if (v_lo & TALITOS_CCPSR_LO_IEU)
557                         dev_err(dev, "invalid execution unit error\n");
558                 if (v_lo & TALITOS_CCPSR_LO_EU)
559                         report_eu_error(dev, ch, current_desc(dev, ch));
560                 if (v_lo & TALITOS_CCPSR_LO_GB)
561                         dev_err(dev, "gather boundary error\n");
562                 if (v_lo & TALITOS_CCPSR_LO_GRL)
563                         dev_err(dev, "gather return/length error\n");
564                 if (v_lo & TALITOS_CCPSR_LO_SB)
565                         dev_err(dev, "scatter boundary error\n");
566                 if (v_lo & TALITOS_CCPSR_LO_SRL)
567                         dev_err(dev, "scatter return/length error\n");
568
569                 flush_channel(dev, ch, error, reset_ch);
570
571                 if (reset_ch) {
572                         reset_channel(dev, ch);
573                 } else {
574                         setbits32(priv->reg + TALITOS_CCCR(ch),
575                                   TALITOS_CCCR_CONT);
576                         setbits32(priv->reg + TALITOS_CCCR_LO(ch), 0);
577                         while ((in_be32(priv->reg + TALITOS_CCCR(ch)) &
578                                TALITOS_CCCR_CONT) && --timeout)
579                                 cpu_relax();
580                         if (timeout == 0) {
581                                 dev_err(dev, "failed to restart channel %d\n",
582                                         ch);
583                                 reset_dev = 1;
584                         }
585                 }
586         }
587         if (reset_dev || isr & ~TALITOS_ISR_CHERR || isr_lo) {
588                 dev_err(dev, "done overflow, internal time out, or rngu error: "
589                         "ISR 0x%08x_%08x\n", isr, isr_lo);
590
591                 /* purge request queues */
592                 for (ch = 0; ch < priv->num_channels; ch++)
593                         flush_channel(dev, ch, -EIO, 1);
594
595                 /* reset and reinitialize the device */
596                 init_device(dev);
597         }
598 }
599
600 static irqreturn_t talitos_interrupt(int irq, void *data)
601 {
602         struct device *dev = data;
603         struct talitos_private *priv = dev_get_drvdata(dev);
604         u32 isr, isr_lo;
605
606         isr = in_be32(priv->reg + TALITOS_ISR);
607         isr_lo = in_be32(priv->reg + TALITOS_ISR_LO);
608         /* Acknowledge interrupt */
609         out_be32(priv->reg + TALITOS_ICR, isr);
610         out_be32(priv->reg + TALITOS_ICR_LO, isr_lo);
611
612         if (unlikely((isr & ~TALITOS_ISR_CHDONE) || isr_lo))
613                 talitos_error((unsigned long)data, isr, isr_lo);
614         else
615                 if (likely(isr & TALITOS_ISR_CHDONE)) {
616                         /* mask further done interrupts. */
617                         clrbits32(priv->reg + TALITOS_IMR, TALITOS_IMR_DONE);
618                         /* done_task will unmask done interrupts at exit */
619                         tasklet_schedule(&priv->done_task);
620                 }
621
622         return (isr || isr_lo) ? IRQ_HANDLED : IRQ_NONE;
623 }
624
625 /*
626  * hwrng
627  */
628 static int talitos_rng_data_present(struct hwrng *rng, int wait)
629 {
630         struct device *dev = (struct device *)rng->priv;
631         struct talitos_private *priv = dev_get_drvdata(dev);
632         u32 ofl;
633         int i;
634
635         for (i = 0; i < 20; i++) {
636                 ofl = in_be32(priv->reg + TALITOS_RNGUSR_LO) &
637                       TALITOS_RNGUSR_LO_OFL;
638                 if (ofl || !wait)
639                         break;
640                 udelay(10);
641         }
642
643         return !!ofl;
644 }
645
646 static int talitos_rng_data_read(struct hwrng *rng, u32 *data)
647 {
648         struct device *dev = (struct device *)rng->priv;
649         struct talitos_private *priv = dev_get_drvdata(dev);
650
651         /* rng fifo requires 64-bit accesses */
652         *data = in_be32(priv->reg + TALITOS_RNGU_FIFO);
653         *data = in_be32(priv->reg + TALITOS_RNGU_FIFO_LO);
654
655         return sizeof(u32);
656 }
657
658 static int talitos_rng_init(struct hwrng *rng)
659 {
660         struct device *dev = (struct device *)rng->priv;
661         struct talitos_private *priv = dev_get_drvdata(dev);
662         unsigned int timeout = TALITOS_TIMEOUT;
663
664         setbits32(priv->reg + TALITOS_RNGURCR_LO, TALITOS_RNGURCR_LO_SR);
665         while (!(in_be32(priv->reg + TALITOS_RNGUSR_LO) & TALITOS_RNGUSR_LO_RD)
666                && --timeout)
667                 cpu_relax();
668         if (timeout == 0) {
669                 dev_err(dev, "failed to reset rng hw\n");
670                 return -ENODEV;
671         }
672
673         /* start generating */
674         setbits32(priv->reg + TALITOS_RNGUDSR_LO, 0);
675
676         return 0;
677 }
678
679 static int talitos_register_rng(struct device *dev)
680 {
681         struct talitos_private *priv = dev_get_drvdata(dev);
682
683         priv->rng.name          = dev_driver_string(dev),
684         priv->rng.init          = talitos_rng_init,
685         priv->rng.data_present  = talitos_rng_data_present,
686         priv->rng.data_read     = talitos_rng_data_read,
687         priv->rng.priv          = (unsigned long)dev;
688
689         return hwrng_register(&priv->rng);
690 }
691
692 static void talitos_unregister_rng(struct device *dev)
693 {
694         struct talitos_private *priv = dev_get_drvdata(dev);
695
696         hwrng_unregister(&priv->rng);
697 }
698
699 /*
700  * crypto alg
701  */
702 #define TALITOS_CRA_PRIORITY            3000
703 #define TALITOS_MAX_KEY_SIZE            64
704 #define TALITOS_MAX_IV_LENGTH           16 /* max of AES_BLOCK_SIZE, DES3_EDE_BLOCK_SIZE */
705
706 #define MD5_BLOCK_SIZE    64
707
708 struct talitos_ctx {
709         struct device *dev;
710         __be32 desc_hdr_template;
711         u8 key[TALITOS_MAX_KEY_SIZE];
712         u8 iv[TALITOS_MAX_IV_LENGTH];
713         unsigned int keylen;
714         unsigned int enckeylen;
715         unsigned int authkeylen;
716         unsigned int authsize;
717 };
718
719 #define HASH_MAX_BLOCK_SIZE             SHA512_BLOCK_SIZE
720 #define TALITOS_MDEU_MAX_CONTEXT_SIZE   TALITOS_MDEU_CONTEXT_SIZE_SHA384_SHA512
721
722 struct talitos_ahash_req_ctx {
723         u32 hw_context[TALITOS_MDEU_MAX_CONTEXT_SIZE / sizeof(u32)];
724         unsigned int hw_context_size;
725         u8 buf[HASH_MAX_BLOCK_SIZE];
726         u8 bufnext[HASH_MAX_BLOCK_SIZE];
727         unsigned int swinit;
728         unsigned int first;
729         unsigned int last;
730         unsigned int to_hash_later;
731         u64 nbuf;
732         struct scatterlist bufsl[2];
733         struct scatterlist *psrc;
734 };
735
736 static int aead_setauthsize(struct crypto_aead *authenc,
737                             unsigned int authsize)
738 {
739         struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
740
741         ctx->authsize = authsize;
742
743         return 0;
744 }
745
746 static int aead_setkey(struct crypto_aead *authenc,
747                        const u8 *key, unsigned int keylen)
748 {
749         struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
750         struct rtattr *rta = (void *)key;
751         struct crypto_authenc_key_param *param;
752         unsigned int authkeylen;
753         unsigned int enckeylen;
754
755         if (!RTA_OK(rta, keylen))
756                 goto badkey;
757
758         if (rta->rta_type != CRYPTO_AUTHENC_KEYA_PARAM)
759                 goto badkey;
760
761         if (RTA_PAYLOAD(rta) < sizeof(*param))
762                 goto badkey;
763
764         param = RTA_DATA(rta);
765         enckeylen = be32_to_cpu(param->enckeylen);
766
767         key += RTA_ALIGN(rta->rta_len);
768         keylen -= RTA_ALIGN(rta->rta_len);
769
770         if (keylen < enckeylen)
771                 goto badkey;
772
773         authkeylen = keylen - enckeylen;
774
775         if (keylen > TALITOS_MAX_KEY_SIZE)
776                 goto badkey;
777
778         memcpy(&ctx->key, key, keylen);
779
780         ctx->keylen = keylen;
781         ctx->enckeylen = enckeylen;
782         ctx->authkeylen = authkeylen;
783
784         return 0;
785
786 badkey:
787         crypto_aead_set_flags(authenc, CRYPTO_TFM_RES_BAD_KEY_LEN);
788         return -EINVAL;
789 }
790
791 /*
792  * talitos_edesc - s/w-extended descriptor
793  * @src_nents: number of segments in input scatterlist
794  * @dst_nents: number of segments in output scatterlist
795  * @dma_len: length of dma mapped link_tbl space
796  * @dma_link_tbl: bus physical address of link_tbl
797  * @desc: h/w descriptor
798  * @link_tbl: input and output h/w link tables (if {src,dst}_nents > 1)
799  *
800  * if decrypting (with authcheck), or either one of src_nents or dst_nents
801  * is greater than 1, an integrity check value is concatenated to the end
802  * of link_tbl data
803  */
804 struct talitos_edesc {
805         int src_nents;
806         int dst_nents;
807         int src_is_chained;
808         int dst_is_chained;
809         int dma_len;
810         dma_addr_t dma_link_tbl;
811         struct talitos_desc desc;
812         struct talitos_ptr link_tbl[0];
813 };
814
815 static int talitos_map_sg(struct device *dev, struct scatterlist *sg,
816                           unsigned int nents, enum dma_data_direction dir,
817                           int chained)
818 {
819         if (unlikely(chained))
820                 while (sg) {
821                         dma_map_sg(dev, sg, 1, dir);
822                         sg = scatterwalk_sg_next(sg);
823                 }
824         else
825                 dma_map_sg(dev, sg, nents, dir);
826         return nents;
827 }
828
829 static void talitos_unmap_sg_chain(struct device *dev, struct scatterlist *sg,
830                                    enum dma_data_direction dir)
831 {
832         while (sg) {
833                 dma_unmap_sg(dev, sg, 1, dir);
834                 sg = scatterwalk_sg_next(sg);
835         }
836 }
837
838 static void talitos_sg_unmap(struct device *dev,
839                              struct talitos_edesc *edesc,
840                              struct scatterlist *src,
841                              struct scatterlist *dst)
842 {
843         unsigned int src_nents = edesc->src_nents ? : 1;
844         unsigned int dst_nents = edesc->dst_nents ? : 1;
845
846         if (src != dst) {
847                 if (edesc->src_is_chained)
848                         talitos_unmap_sg_chain(dev, src, DMA_TO_DEVICE);
849                 else
850                         dma_unmap_sg(dev, src, src_nents, DMA_TO_DEVICE);
851
852                 if (dst) {
853                         if (edesc->dst_is_chained)
854                                 talitos_unmap_sg_chain(dev, dst,
855                                                        DMA_FROM_DEVICE);
856                         else
857                                 dma_unmap_sg(dev, dst, dst_nents,
858                                              DMA_FROM_DEVICE);
859                 }
860         } else
861                 if (edesc->src_is_chained)
862                         talitos_unmap_sg_chain(dev, src, DMA_BIDIRECTIONAL);
863                 else
864                         dma_unmap_sg(dev, src, src_nents, DMA_BIDIRECTIONAL);
865 }
866
867 static void ipsec_esp_unmap(struct device *dev,
868                             struct talitos_edesc *edesc,
869                             struct aead_request *areq)
870 {
871         unmap_single_talitos_ptr(dev, &edesc->desc.ptr[6], DMA_FROM_DEVICE);
872         unmap_single_talitos_ptr(dev, &edesc->desc.ptr[3], DMA_TO_DEVICE);
873         unmap_single_talitos_ptr(dev, &edesc->desc.ptr[2], DMA_TO_DEVICE);
874         unmap_single_talitos_ptr(dev, &edesc->desc.ptr[0], DMA_TO_DEVICE);
875
876         dma_unmap_sg(dev, areq->assoc, 1, DMA_TO_DEVICE);
877
878         talitos_sg_unmap(dev, edesc, areq->src, areq->dst);
879
880         if (edesc->dma_len)
881                 dma_unmap_single(dev, edesc->dma_link_tbl, edesc->dma_len,
882                                  DMA_BIDIRECTIONAL);
883 }
884
885 /*
886  * ipsec_esp descriptor callbacks
887  */
888 static void ipsec_esp_encrypt_done(struct device *dev,
889                                    struct talitos_desc *desc, void *context,
890                                    int err)
891 {
892         struct aead_request *areq = context;
893         struct crypto_aead *authenc = crypto_aead_reqtfm(areq);
894         struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
895         struct talitos_edesc *edesc;
896         struct scatterlist *sg;
897         void *icvdata;
898
899         edesc = container_of(desc, struct talitos_edesc, desc);
900
901         ipsec_esp_unmap(dev, edesc, areq);
902
903         /* copy the generated ICV to dst */
904         if (edesc->dma_len) {
905                 icvdata = &edesc->link_tbl[edesc->src_nents +
906                                            edesc->dst_nents + 2];
907                 sg = sg_last(areq->dst, edesc->dst_nents);
908                 memcpy((char *)sg_virt(sg) + sg->length - ctx->authsize,
909                        icvdata, ctx->authsize);
910         }
911
912         kfree(edesc);
913
914         aead_request_complete(areq, err);
915 }
916
917 static void ipsec_esp_decrypt_swauth_done(struct device *dev,
918                                           struct talitos_desc *desc,
919                                           void *context, int err)
920 {
921         struct aead_request *req = context;
922         struct crypto_aead *authenc = crypto_aead_reqtfm(req);
923         struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
924         struct talitos_edesc *edesc;
925         struct scatterlist *sg;
926         void *icvdata;
927
928         edesc = container_of(desc, struct talitos_edesc, desc);
929
930         ipsec_esp_unmap(dev, edesc, req);
931
932         if (!err) {
933                 /* auth check */
934                 if (edesc->dma_len)
935                         icvdata = &edesc->link_tbl[edesc->src_nents +
936                                                    edesc->dst_nents + 2];
937                 else
938                         icvdata = &edesc->link_tbl[0];
939
940                 sg = sg_last(req->dst, edesc->dst_nents ? : 1);
941                 err = memcmp(icvdata, (char *)sg_virt(sg) + sg->length -
942                              ctx->authsize, ctx->authsize) ? -EBADMSG : 0;
943         }
944
945         kfree(edesc);
946
947         aead_request_complete(req, err);
948 }
949
950 static void ipsec_esp_decrypt_hwauth_done(struct device *dev,
951                                           struct talitos_desc *desc,
952                                           void *context, int err)
953 {
954         struct aead_request *req = context;
955         struct talitos_edesc *edesc;
956
957         edesc = container_of(desc, struct talitos_edesc, desc);
958
959         ipsec_esp_unmap(dev, edesc, req);
960
961         /* check ICV auth status */
962         if (!err && ((desc->hdr_lo & DESC_HDR_LO_ICCR1_MASK) !=
963                      DESC_HDR_LO_ICCR1_PASS))
964                 err = -EBADMSG;
965
966         kfree(edesc);
967
968         aead_request_complete(req, err);
969 }
970
971 /*
972  * convert scatterlist to SEC h/w link table format
973  * stop at cryptlen bytes
974  */
975 static int sg_to_link_tbl(struct scatterlist *sg, int sg_count,
976                            int cryptlen, struct talitos_ptr *link_tbl_ptr)
977 {
978         int n_sg = sg_count;
979
980         while (n_sg--) {
981                 to_talitos_ptr(link_tbl_ptr, sg_dma_address(sg));
982                 link_tbl_ptr->len = cpu_to_be16(sg_dma_len(sg));
983                 link_tbl_ptr->j_extent = 0;
984                 link_tbl_ptr++;
985                 cryptlen -= sg_dma_len(sg);
986                 sg = scatterwalk_sg_next(sg);
987         }
988
989         /* adjust (decrease) last one (or two) entry's len to cryptlen */
990         link_tbl_ptr--;
991         while (be16_to_cpu(link_tbl_ptr->len) <= (-cryptlen)) {
992                 /* Empty this entry, and move to previous one */
993                 cryptlen += be16_to_cpu(link_tbl_ptr->len);
994                 link_tbl_ptr->len = 0;
995                 sg_count--;
996                 link_tbl_ptr--;
997         }
998         link_tbl_ptr->len = cpu_to_be16(be16_to_cpu(link_tbl_ptr->len)
999                                         + cryptlen);
1000
1001         /* tag end of link table */
1002         link_tbl_ptr->j_extent = DESC_PTR_LNKTBL_RETURN;
1003
1004         return sg_count;
1005 }
1006
1007 /*
1008  * fill in and submit ipsec_esp descriptor
1009  */
1010 static int ipsec_esp(struct talitos_edesc *edesc, struct aead_request *areq,
1011                      u8 *giv, u64 seq,
1012                      void (*callback) (struct device *dev,
1013                                        struct talitos_desc *desc,
1014                                        void *context, int error))
1015 {
1016         struct crypto_aead *aead = crypto_aead_reqtfm(areq);
1017         struct talitos_ctx *ctx = crypto_aead_ctx(aead);
1018         struct device *dev = ctx->dev;
1019         struct talitos_desc *desc = &edesc->desc;
1020         unsigned int cryptlen = areq->cryptlen;
1021         unsigned int authsize = ctx->authsize;
1022         unsigned int ivsize = crypto_aead_ivsize(aead);
1023         int sg_count, ret;
1024         int sg_link_tbl_len;
1025
1026         /* hmac key */
1027         map_single_talitos_ptr(dev, &desc->ptr[0], ctx->authkeylen, &ctx->key,
1028                                0, DMA_TO_DEVICE);
1029         /* hmac data */
1030         map_single_talitos_ptr(dev, &desc->ptr[1], areq->assoclen + ivsize,
1031                                sg_virt(areq->assoc), 0, DMA_TO_DEVICE);
1032         /* cipher iv */
1033         map_single_talitos_ptr(dev, &desc->ptr[2], ivsize, giv ?: areq->iv, 0,
1034                                DMA_TO_DEVICE);
1035
1036         /* cipher key */
1037         map_single_talitos_ptr(dev, &desc->ptr[3], ctx->enckeylen,
1038                                (char *)&ctx->key + ctx->authkeylen, 0,
1039                                DMA_TO_DEVICE);
1040
1041         /*
1042          * cipher in
1043          * map and adjust cipher len to aead request cryptlen.
1044          * extent is bytes of HMAC postpended to ciphertext,
1045          * typically 12 for ipsec
1046          */
1047         desc->ptr[4].len = cpu_to_be16(cryptlen);
1048         desc->ptr[4].j_extent = authsize;
1049
1050         sg_count = talitos_map_sg(dev, areq->src, edesc->src_nents ? : 1,
1051                                   (areq->src == areq->dst) ? DMA_BIDIRECTIONAL
1052                                                            : DMA_TO_DEVICE,
1053                                   edesc->src_is_chained);
1054
1055         if (sg_count == 1) {
1056                 to_talitos_ptr(&desc->ptr[4], sg_dma_address(areq->src));
1057         } else {
1058                 sg_link_tbl_len = cryptlen;
1059
1060                 if (edesc->desc.hdr & DESC_HDR_MODE1_MDEU_CICV)
1061                         sg_link_tbl_len = cryptlen + authsize;
1062
1063                 sg_count = sg_to_link_tbl(areq->src, sg_count, sg_link_tbl_len,
1064                                           &edesc->link_tbl[0]);
1065                 if (sg_count > 1) {
1066                         desc->ptr[4].j_extent |= DESC_PTR_LNKTBL_JUMP;
1067                         to_talitos_ptr(&desc->ptr[4], edesc->dma_link_tbl);
1068                         dma_sync_single_for_device(dev, edesc->dma_link_tbl,
1069                                                    edesc->dma_len,
1070                                                    DMA_BIDIRECTIONAL);
1071                 } else {
1072                         /* Only one segment now, so no link tbl needed */
1073                         to_talitos_ptr(&desc->ptr[4],
1074                                        sg_dma_address(areq->src));
1075                 }
1076         }
1077
1078         /* cipher out */
1079         desc->ptr[5].len = cpu_to_be16(cryptlen);
1080         desc->ptr[5].j_extent = authsize;
1081
1082         if (areq->src != areq->dst)
1083                 sg_count = talitos_map_sg(dev, areq->dst,
1084                                           edesc->dst_nents ? : 1,
1085                                           DMA_FROM_DEVICE,
1086                                           edesc->dst_is_chained);
1087
1088         if (sg_count == 1) {
1089                 to_talitos_ptr(&desc->ptr[5], sg_dma_address(areq->dst));
1090         } else {
1091                 struct talitos_ptr *link_tbl_ptr =
1092                         &edesc->link_tbl[edesc->src_nents + 1];
1093
1094                 to_talitos_ptr(&desc->ptr[5], edesc->dma_link_tbl +
1095                                (edesc->src_nents + 1) *
1096                                sizeof(struct talitos_ptr));
1097                 sg_count = sg_to_link_tbl(areq->dst, sg_count, cryptlen,
1098                                           link_tbl_ptr);
1099
1100                 /* Add an entry to the link table for ICV data */
1101                 link_tbl_ptr += sg_count - 1;
1102                 link_tbl_ptr->j_extent = 0;
1103                 sg_count++;
1104                 link_tbl_ptr++;
1105                 link_tbl_ptr->j_extent = DESC_PTR_LNKTBL_RETURN;
1106                 link_tbl_ptr->len = cpu_to_be16(authsize);
1107
1108                 /* icv data follows link tables */
1109                 to_talitos_ptr(link_tbl_ptr, edesc->dma_link_tbl +
1110                                (edesc->src_nents + edesc->dst_nents + 2) *
1111                                sizeof(struct talitos_ptr));
1112                 desc->ptr[5].j_extent |= DESC_PTR_LNKTBL_JUMP;
1113                 dma_sync_single_for_device(ctx->dev, edesc->dma_link_tbl,
1114                                            edesc->dma_len, DMA_BIDIRECTIONAL);
1115         }
1116
1117         /* iv out */
1118         map_single_talitos_ptr(dev, &desc->ptr[6], ivsize, ctx->iv, 0,
1119                                DMA_FROM_DEVICE);
1120
1121         ret = talitos_submit(dev, desc, callback, areq);
1122         if (ret != -EINPROGRESS) {
1123                 ipsec_esp_unmap(dev, edesc, areq);
1124                 kfree(edesc);
1125         }
1126         return ret;
1127 }
1128
1129 /*
1130  * derive number of elements in scatterlist
1131  */
1132 static int sg_count(struct scatterlist *sg_list, int nbytes, int *chained)
1133 {
1134         struct scatterlist *sg = sg_list;
1135         int sg_nents = 0;
1136
1137         *chained = 0;
1138         while (nbytes > 0) {
1139                 sg_nents++;
1140                 nbytes -= sg->length;
1141                 if (!sg_is_last(sg) && (sg + 1)->length == 0)
1142                         *chained = 1;
1143                 sg = scatterwalk_sg_next(sg);
1144         }
1145
1146         return sg_nents;
1147 }
1148
1149 /**
1150  * sg_copy_end_to_buffer - Copy end data from SG list to a linear buffer
1151  * @sgl:                 The SG list
1152  * @nents:               Number of SG entries
1153  * @buf:                 Where to copy to
1154  * @buflen:              The number of bytes to copy
1155  * @skip:                The number of bytes to skip before copying.
1156  *                       Note: skip + buflen should equal SG total size.
1157  *
1158  * Returns the number of copied bytes.
1159  *
1160  **/
1161 static size_t sg_copy_end_to_buffer(struct scatterlist *sgl, unsigned int nents,
1162                                     void *buf, size_t buflen, unsigned int skip)
1163 {
1164         unsigned int offset = 0;
1165         unsigned int boffset = 0;
1166         struct sg_mapping_iter miter;
1167         unsigned long flags;
1168         unsigned int sg_flags = SG_MITER_ATOMIC;
1169         size_t total_buffer = buflen + skip;
1170
1171         sg_flags |= SG_MITER_FROM_SG;
1172
1173         sg_miter_start(&miter, sgl, nents, sg_flags);
1174
1175         local_irq_save(flags);
1176
1177         while (sg_miter_next(&miter) && offset < total_buffer) {
1178                 unsigned int len;
1179                 unsigned int ignore;
1180
1181                 if ((offset + miter.length) > skip) {
1182                         if (offset < skip) {
1183                                 /* Copy part of this segment */
1184                                 ignore = skip - offset;
1185                                 len = miter.length - ignore;
1186                                 if (boffset + len > buflen)
1187                                         len = buflen - boffset;
1188                                 memcpy(buf + boffset, miter.addr + ignore, len);
1189                         } else {
1190                                 /* Copy all of this segment (up to buflen) */
1191                                 len = miter.length;
1192                                 if (boffset + len > buflen)
1193                                         len = buflen - boffset;
1194                                 memcpy(buf + boffset, miter.addr, len);
1195                         }
1196                         boffset += len;
1197                 }
1198                 offset += miter.length;
1199         }
1200
1201         sg_miter_stop(&miter);
1202
1203         local_irq_restore(flags);
1204         return boffset;
1205 }
1206
1207 /*
1208  * allocate and map the extended descriptor
1209  */
1210 static struct talitos_edesc *talitos_edesc_alloc(struct device *dev,
1211                                                  struct scatterlist *src,
1212                                                  struct scatterlist *dst,
1213                                                  int hash_result,
1214                                                  unsigned int cryptlen,
1215                                                  unsigned int authsize,
1216                                                  int icv_stashing,
1217                                                  u32 cryptoflags)
1218 {
1219         struct talitos_edesc *edesc;
1220         int src_nents, dst_nents, alloc_len, dma_len;
1221         int src_chained, dst_chained = 0;
1222         gfp_t flags = cryptoflags & CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL :
1223                       GFP_ATOMIC;
1224
1225         if (cryptlen + authsize > TALITOS_MAX_DATA_LEN) {
1226                 dev_err(dev, "length exceeds h/w max limit\n");
1227                 return ERR_PTR(-EINVAL);
1228         }
1229
1230         src_nents = sg_count(src, cryptlen + authsize, &src_chained);
1231         src_nents = (src_nents == 1) ? 0 : src_nents;
1232
1233         if (hash_result) {
1234                 dst_nents = 0;
1235         } else {
1236                 if (dst == src) {
1237                         dst_nents = src_nents;
1238                 } else {
1239                         dst_nents = sg_count(dst, cryptlen + authsize,
1240                                              &dst_chained);
1241                         dst_nents = (dst_nents == 1) ? 0 : dst_nents;
1242                 }
1243         }
1244
1245         /*
1246          * allocate space for base edesc plus the link tables,
1247          * allowing for two separate entries for ICV and generated ICV (+ 2),
1248          * and the ICV data itself
1249          */
1250         alloc_len = sizeof(struct talitos_edesc);
1251         if (src_nents || dst_nents) {
1252                 dma_len = (src_nents + dst_nents + 2) *
1253                                  sizeof(struct talitos_ptr) + authsize;
1254                 alloc_len += dma_len;
1255         } else {
1256                 dma_len = 0;
1257                 alloc_len += icv_stashing ? authsize : 0;
1258         }
1259
1260         edesc = kmalloc(alloc_len, GFP_DMA | flags);
1261         if (!edesc) {
1262                 dev_err(dev, "could not allocate edescriptor\n");
1263                 return ERR_PTR(-ENOMEM);
1264         }
1265
1266         edesc->src_nents = src_nents;
1267         edesc->dst_nents = dst_nents;
1268         edesc->src_is_chained = src_chained;
1269         edesc->dst_is_chained = dst_chained;
1270         edesc->dma_len = dma_len;
1271         if (dma_len)
1272                 edesc->dma_link_tbl = dma_map_single(dev, &edesc->link_tbl[0],
1273                                                      edesc->dma_len,
1274                                                      DMA_BIDIRECTIONAL);
1275
1276         return edesc;
1277 }
1278
1279 static struct talitos_edesc *aead_edesc_alloc(struct aead_request *areq,
1280                                               int icv_stashing)
1281 {
1282         struct crypto_aead *authenc = crypto_aead_reqtfm(areq);
1283         struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
1284
1285         return talitos_edesc_alloc(ctx->dev, areq->src, areq->dst, 0,
1286                                    areq->cryptlen, ctx->authsize, icv_stashing,
1287                                    areq->base.flags);
1288 }
1289
1290 static int aead_encrypt(struct aead_request *req)
1291 {
1292         struct crypto_aead *authenc = crypto_aead_reqtfm(req);
1293         struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
1294         struct talitos_edesc *edesc;
1295
1296         /* allocate extended descriptor */
1297         edesc = aead_edesc_alloc(req, 0);
1298         if (IS_ERR(edesc))
1299                 return PTR_ERR(edesc);
1300
1301         /* set encrypt */
1302         edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT;
1303
1304         return ipsec_esp(edesc, req, NULL, 0, ipsec_esp_encrypt_done);
1305 }
1306
1307 static int aead_decrypt(struct aead_request *req)
1308 {
1309         struct crypto_aead *authenc = crypto_aead_reqtfm(req);
1310         struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
1311         unsigned int authsize = ctx->authsize;
1312         struct talitos_private *priv = dev_get_drvdata(ctx->dev);
1313         struct talitos_edesc *edesc;
1314         struct scatterlist *sg;
1315         void *icvdata;
1316
1317         req->cryptlen -= authsize;
1318
1319         /* allocate extended descriptor */
1320         edesc = aead_edesc_alloc(req, 1);
1321         if (IS_ERR(edesc))
1322                 return PTR_ERR(edesc);
1323
1324         if ((priv->features & TALITOS_FTR_HW_AUTH_CHECK) &&
1325             ((!edesc->src_nents && !edesc->dst_nents) ||
1326              priv->features & TALITOS_FTR_SRC_LINK_TBL_LEN_INCLUDES_EXTENT)) {
1327
1328                 /* decrypt and check the ICV */
1329                 edesc->desc.hdr = ctx->desc_hdr_template |
1330                                   DESC_HDR_DIR_INBOUND |
1331                                   DESC_HDR_MODE1_MDEU_CICV;
1332
1333                 /* reset integrity check result bits */
1334                 edesc->desc.hdr_lo = 0;
1335
1336                 return ipsec_esp(edesc, req, NULL, 0,
1337                                  ipsec_esp_decrypt_hwauth_done);
1338
1339         }
1340
1341         /* Have to check the ICV with software */
1342         edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_DIR_INBOUND;
1343
1344         /* stash incoming ICV for later cmp with ICV generated by the h/w */
1345         if (edesc->dma_len)
1346                 icvdata = &edesc->link_tbl[edesc->src_nents +
1347                                            edesc->dst_nents + 2];
1348         else
1349                 icvdata = &edesc->link_tbl[0];
1350
1351         sg = sg_last(req->src, edesc->src_nents ? : 1);
1352
1353         memcpy(icvdata, (char *)sg_virt(sg) + sg->length - ctx->authsize,
1354                ctx->authsize);
1355
1356         return ipsec_esp(edesc, req, NULL, 0, ipsec_esp_decrypt_swauth_done);
1357 }
1358
1359 static int aead_givencrypt(struct aead_givcrypt_request *req)
1360 {
1361         struct aead_request *areq = &req->areq;
1362         struct crypto_aead *authenc = crypto_aead_reqtfm(areq);
1363         struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
1364         struct talitos_edesc *edesc;
1365
1366         /* allocate extended descriptor */
1367         edesc = aead_edesc_alloc(areq, 0);
1368         if (IS_ERR(edesc))
1369                 return PTR_ERR(edesc);
1370
1371         /* set encrypt */
1372         edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT;
1373
1374         memcpy(req->giv, ctx->iv, crypto_aead_ivsize(authenc));
1375         /* avoid consecutive packets going out with same IV */
1376         *(__be64 *)req->giv ^= cpu_to_be64(req->seq);
1377
1378         return ipsec_esp(edesc, areq, req->giv, req->seq,
1379                          ipsec_esp_encrypt_done);
1380 }
1381
1382 static int ablkcipher_setkey(struct crypto_ablkcipher *cipher,
1383                              const u8 *key, unsigned int keylen)
1384 {
1385         struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher);
1386         struct ablkcipher_alg *alg = crypto_ablkcipher_alg(cipher);
1387
1388         if (keylen > TALITOS_MAX_KEY_SIZE)
1389                 goto badkey;
1390
1391         if (keylen < alg->min_keysize || keylen > alg->max_keysize)
1392                 goto badkey;
1393
1394         memcpy(&ctx->key, key, keylen);
1395         ctx->keylen = keylen;
1396
1397         return 0;
1398
1399 badkey:
1400         crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
1401         return -EINVAL;
1402 }
1403
1404 static void common_nonsnoop_unmap(struct device *dev,
1405                                   struct talitos_edesc *edesc,
1406                                   struct ablkcipher_request *areq)
1407 {
1408         unmap_single_talitos_ptr(dev, &edesc->desc.ptr[5], DMA_FROM_DEVICE);
1409         unmap_single_talitos_ptr(dev, &edesc->desc.ptr[2], DMA_TO_DEVICE);
1410         unmap_single_talitos_ptr(dev, &edesc->desc.ptr[1], DMA_TO_DEVICE);
1411
1412         talitos_sg_unmap(dev, edesc, areq->src, areq->dst);
1413
1414         if (edesc->dma_len)
1415                 dma_unmap_single(dev, edesc->dma_link_tbl, edesc->dma_len,
1416                                  DMA_BIDIRECTIONAL);
1417 }
1418
1419 static void ablkcipher_done(struct device *dev,
1420                             struct talitos_desc *desc, void *context,
1421                             int err)
1422 {
1423         struct ablkcipher_request *areq = context;
1424         struct talitos_edesc *edesc;
1425
1426         edesc = container_of(desc, struct talitos_edesc, desc);
1427
1428         common_nonsnoop_unmap(dev, edesc, areq);
1429
1430         kfree(edesc);
1431
1432         areq->base.complete(&areq->base, err);
1433 }
1434
1435 static int common_nonsnoop(struct talitos_edesc *edesc,
1436                            struct ablkcipher_request *areq,
1437                            u8 *giv,
1438                            void (*callback) (struct device *dev,
1439                                              struct talitos_desc *desc,
1440                                              void *context, int error))
1441 {
1442         struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq);
1443         struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher);
1444         struct device *dev = ctx->dev;
1445         struct talitos_desc *desc = &edesc->desc;
1446         unsigned int cryptlen = areq->nbytes;
1447         unsigned int ivsize;
1448         int sg_count, ret;
1449
1450         /* first DWORD empty */
1451         desc->ptr[0].len = 0;
1452         to_talitos_ptr(&desc->ptr[0], 0);
1453         desc->ptr[0].j_extent = 0;
1454
1455         /* cipher iv */
1456         ivsize = crypto_ablkcipher_ivsize(cipher);
1457         map_single_talitos_ptr(dev, &desc->ptr[1], ivsize, giv ?: areq->info, 0,
1458                                DMA_TO_DEVICE);
1459
1460         /* cipher key */
1461         map_single_talitos_ptr(dev, &desc->ptr[2], ctx->keylen,
1462                                (char *)&ctx->key, 0, DMA_TO_DEVICE);
1463
1464         /*
1465          * cipher in
1466          */
1467         desc->ptr[3].len = cpu_to_be16(cryptlen);
1468         desc->ptr[3].j_extent = 0;
1469
1470         sg_count = talitos_map_sg(dev, areq->src, edesc->src_nents ? : 1,
1471                                   (areq->src == areq->dst) ? DMA_BIDIRECTIONAL
1472                                                            : DMA_TO_DEVICE,
1473                                   edesc->src_is_chained);
1474
1475         if (sg_count == 1) {
1476                 to_talitos_ptr(&desc->ptr[3], sg_dma_address(areq->src));
1477         } else {
1478                 sg_count = sg_to_link_tbl(areq->src, sg_count, cryptlen,
1479                                           &edesc->link_tbl[0]);
1480                 if (sg_count > 1) {
1481                         to_talitos_ptr(&desc->ptr[3], edesc->dma_link_tbl);
1482                         desc->ptr[3].j_extent |= DESC_PTR_LNKTBL_JUMP;
1483                         dma_sync_single_for_device(dev, edesc->dma_link_tbl,
1484                                                    edesc->dma_len,
1485                                                    DMA_BIDIRECTIONAL);
1486                 } else {
1487                         /* Only one segment now, so no link tbl needed */
1488                         to_talitos_ptr(&desc->ptr[3],
1489                                        sg_dma_address(areq->src));
1490                 }
1491         }
1492
1493         /* cipher out */
1494         desc->ptr[4].len = cpu_to_be16(cryptlen);
1495         desc->ptr[4].j_extent = 0;
1496
1497         if (areq->src != areq->dst)
1498                 sg_count = talitos_map_sg(dev, areq->dst,
1499                                           edesc->dst_nents ? : 1,
1500                                           DMA_FROM_DEVICE,
1501                                           edesc->dst_is_chained);
1502
1503         if (sg_count == 1) {
1504                 to_talitos_ptr(&desc->ptr[4], sg_dma_address(areq->dst));
1505         } else {
1506                 struct talitos_ptr *link_tbl_ptr =
1507                         &edesc->link_tbl[edesc->src_nents + 1];
1508
1509                 to_talitos_ptr(&desc->ptr[4], edesc->dma_link_tbl +
1510                                               (edesc->src_nents + 1) *
1511                                               sizeof(struct talitos_ptr));
1512                 desc->ptr[4].j_extent |= DESC_PTR_LNKTBL_JUMP;
1513                 sg_count = sg_to_link_tbl(areq->dst, sg_count, cryptlen,
1514                                           link_tbl_ptr);
1515                 dma_sync_single_for_device(ctx->dev, edesc->dma_link_tbl,
1516                                            edesc->dma_len, DMA_BIDIRECTIONAL);
1517         }
1518
1519         /* iv out */
1520         map_single_talitos_ptr(dev, &desc->ptr[5], ivsize, ctx->iv, 0,
1521                                DMA_FROM_DEVICE);
1522
1523         /* last DWORD empty */
1524         desc->ptr[6].len = 0;
1525         to_talitos_ptr(&desc->ptr[6], 0);
1526         desc->ptr[6].j_extent = 0;
1527
1528         ret = talitos_submit(dev, desc, callback, areq);
1529         if (ret != -EINPROGRESS) {
1530                 common_nonsnoop_unmap(dev, edesc, areq);
1531                 kfree(edesc);
1532         }
1533         return ret;
1534 }
1535
1536 static struct talitos_edesc *ablkcipher_edesc_alloc(struct ablkcipher_request *
1537                                                     areq)
1538 {
1539         struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq);
1540         struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher);
1541
1542         return talitos_edesc_alloc(ctx->dev, areq->src, areq->dst, 0,
1543                                    areq->nbytes, 0, 0, areq->base.flags);
1544 }
1545
1546 static int ablkcipher_encrypt(struct ablkcipher_request *areq)
1547 {
1548         struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq);
1549         struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher);
1550         struct talitos_edesc *edesc;
1551
1552         /* allocate extended descriptor */
1553         edesc = ablkcipher_edesc_alloc(areq);
1554         if (IS_ERR(edesc))
1555                 return PTR_ERR(edesc);
1556
1557         /* set encrypt */
1558         edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT;
1559
1560         return common_nonsnoop(edesc, areq, NULL, ablkcipher_done);
1561 }
1562
1563 static int ablkcipher_decrypt(struct ablkcipher_request *areq)
1564 {
1565         struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq);
1566         struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher);
1567         struct talitos_edesc *edesc;
1568
1569         /* allocate extended descriptor */
1570         edesc = ablkcipher_edesc_alloc(areq);
1571         if (IS_ERR(edesc))
1572                 return PTR_ERR(edesc);
1573
1574         edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_DIR_INBOUND;
1575
1576         return common_nonsnoop(edesc, areq, NULL, ablkcipher_done);
1577 }
1578
1579 static void common_nonsnoop_hash_unmap(struct device *dev,
1580                                        struct talitos_edesc *edesc,
1581                                        struct ahash_request *areq)
1582 {
1583         struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1584
1585         unmap_single_talitos_ptr(dev, &edesc->desc.ptr[5], DMA_FROM_DEVICE);
1586
1587         /* When using hashctx-in, must unmap it. */
1588         if (edesc->desc.ptr[1].len)
1589                 unmap_single_talitos_ptr(dev, &edesc->desc.ptr[1],
1590                                          DMA_TO_DEVICE);
1591
1592         if (edesc->desc.ptr[2].len)
1593                 unmap_single_talitos_ptr(dev, &edesc->desc.ptr[2],
1594                                          DMA_TO_DEVICE);
1595
1596         talitos_sg_unmap(dev, edesc, req_ctx->psrc, NULL);
1597
1598         if (edesc->dma_len)
1599                 dma_unmap_single(dev, edesc->dma_link_tbl, edesc->dma_len,
1600                                  DMA_BIDIRECTIONAL);
1601
1602 }
1603
1604 static void ahash_done(struct device *dev,
1605                        struct talitos_desc *desc, void *context,
1606                        int err)
1607 {
1608         struct ahash_request *areq = context;
1609         struct talitos_edesc *edesc =
1610                  container_of(desc, struct talitos_edesc, desc);
1611         struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1612
1613         if (!req_ctx->last && req_ctx->to_hash_later) {
1614                 /* Position any partial block for next update/final/finup */
1615                 memcpy(req_ctx->buf, req_ctx->bufnext, req_ctx->to_hash_later);
1616                 req_ctx->nbuf = req_ctx->to_hash_later;
1617         }
1618         common_nonsnoop_hash_unmap(dev, edesc, areq);
1619
1620         kfree(edesc);
1621
1622         areq->base.complete(&areq->base, err);
1623 }
1624
1625 static int common_nonsnoop_hash(struct talitos_edesc *edesc,
1626                                 struct ahash_request *areq, unsigned int length,
1627                                 void (*callback) (struct device *dev,
1628                                                   struct talitos_desc *desc,
1629                                                   void *context, int error))
1630 {
1631         struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
1632         struct talitos_ctx *ctx = crypto_ahash_ctx(tfm);
1633         struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1634         struct device *dev = ctx->dev;
1635         struct talitos_desc *desc = &edesc->desc;
1636         int sg_count, ret;
1637
1638         /* first DWORD empty */
1639         desc->ptr[0] = zero_entry;
1640
1641         /* hash context in */
1642         if (!req_ctx->first || req_ctx->swinit) {
1643                 map_single_talitos_ptr(dev, &desc->ptr[1],
1644                                        req_ctx->hw_context_size,
1645                                        (char *)req_ctx->hw_context, 0,
1646                                        DMA_TO_DEVICE);
1647                 req_ctx->swinit = 0;
1648         } else {
1649                 desc->ptr[1] = zero_entry;
1650                 /* Indicate next op is not the first. */
1651                 req_ctx->first = 0;
1652         }
1653
1654         /* HMAC key */
1655         if (ctx->keylen)
1656                 map_single_talitos_ptr(dev, &desc->ptr[2], ctx->keylen,
1657                                        (char *)&ctx->key, 0, DMA_TO_DEVICE);
1658         else
1659                 desc->ptr[2] = zero_entry;
1660
1661         /*
1662          * data in
1663          */
1664         desc->ptr[3].len = cpu_to_be16(length);
1665         desc->ptr[3].j_extent = 0;
1666
1667         sg_count = talitos_map_sg(dev, req_ctx->psrc,
1668                                   edesc->src_nents ? : 1,
1669                                   DMA_TO_DEVICE,
1670                                   edesc->src_is_chained);
1671
1672         if (sg_count == 1) {
1673                 to_talitos_ptr(&desc->ptr[3], sg_dma_address(req_ctx->psrc));
1674         } else {
1675                 sg_count = sg_to_link_tbl(req_ctx->psrc, sg_count, length,
1676                                           &edesc->link_tbl[0]);
1677                 if (sg_count > 1) {
1678                         desc->ptr[3].j_extent |= DESC_PTR_LNKTBL_JUMP;
1679                         to_talitos_ptr(&desc->ptr[3], edesc->dma_link_tbl);
1680                         dma_sync_single_for_device(ctx->dev,
1681                                                    edesc->dma_link_tbl,
1682                                                    edesc->dma_len,
1683                                                    DMA_BIDIRECTIONAL);
1684                 } else {
1685                         /* Only one segment now, so no link tbl needed */
1686                         to_talitos_ptr(&desc->ptr[3],
1687                                        sg_dma_address(req_ctx->psrc));
1688                 }
1689         }
1690
1691         /* fifth DWORD empty */
1692         desc->ptr[4] = zero_entry;
1693
1694         /* hash/HMAC out -or- hash context out */
1695         if (req_ctx->last)
1696                 map_single_talitos_ptr(dev, &desc->ptr[5],
1697                                        crypto_ahash_digestsize(tfm),
1698                                        areq->result, 0, DMA_FROM_DEVICE);
1699         else
1700                 map_single_talitos_ptr(dev, &desc->ptr[5],
1701                                        req_ctx->hw_context_size,
1702                                        req_ctx->hw_context, 0, DMA_FROM_DEVICE);
1703
1704         /* last DWORD empty */
1705         desc->ptr[6] = zero_entry;
1706
1707         ret = talitos_submit(dev, desc, callback, areq);
1708         if (ret != -EINPROGRESS) {
1709                 common_nonsnoop_hash_unmap(dev, edesc, areq);
1710                 kfree(edesc);
1711         }
1712         return ret;
1713 }
1714
1715 static struct talitos_edesc *ahash_edesc_alloc(struct ahash_request *areq,
1716                                                unsigned int nbytes)
1717 {
1718         struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
1719         struct talitos_ctx *ctx = crypto_ahash_ctx(tfm);
1720         struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1721
1722         return talitos_edesc_alloc(ctx->dev, req_ctx->psrc, NULL, 1,
1723                                    nbytes, 0, 0, areq->base.flags);
1724 }
1725
1726 static int ahash_init(struct ahash_request *areq)
1727 {
1728         struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
1729         struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1730
1731         /* Initialize the context */
1732         req_ctx->nbuf = 0;
1733         req_ctx->first = 1; /* first indicates h/w must init its context */
1734         req_ctx->swinit = 0; /* assume h/w init of context */
1735         req_ctx->hw_context_size =
1736                 (crypto_ahash_digestsize(tfm) <= SHA256_DIGEST_SIZE)
1737                         ? TALITOS_MDEU_CONTEXT_SIZE_MD5_SHA1_SHA256
1738                         : TALITOS_MDEU_CONTEXT_SIZE_SHA384_SHA512;
1739
1740         return 0;
1741 }
1742
1743 /*
1744  * on h/w without explicit sha224 support, we initialize h/w context
1745  * manually with sha224 constants, and tell it to run sha256.
1746  */
1747 static int ahash_init_sha224_swinit(struct ahash_request *areq)
1748 {
1749         struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1750
1751         ahash_init(areq);
1752         req_ctx->swinit = 1;/* prevent h/w initting context with sha256 values*/
1753
1754         req_ctx->hw_context[0] = cpu_to_be32(SHA224_H0);
1755         req_ctx->hw_context[1] = cpu_to_be32(SHA224_H1);
1756         req_ctx->hw_context[2] = cpu_to_be32(SHA224_H2);
1757         req_ctx->hw_context[3] = cpu_to_be32(SHA224_H3);
1758         req_ctx->hw_context[4] = cpu_to_be32(SHA224_H4);
1759         req_ctx->hw_context[5] = cpu_to_be32(SHA224_H5);
1760         req_ctx->hw_context[6] = cpu_to_be32(SHA224_H6);
1761         req_ctx->hw_context[7] = cpu_to_be32(SHA224_H7);
1762
1763         /* init 64-bit count */
1764         req_ctx->hw_context[8] = 0;
1765         req_ctx->hw_context[9] = 0;
1766
1767         return 0;
1768 }
1769
1770 static int ahash_process_req(struct ahash_request *areq, unsigned int nbytes)
1771 {
1772         struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
1773         struct talitos_ctx *ctx = crypto_ahash_ctx(tfm);
1774         struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1775         struct talitos_edesc *edesc;
1776         unsigned int blocksize =
1777                         crypto_tfm_alg_blocksize(crypto_ahash_tfm(tfm));
1778         unsigned int nbytes_to_hash;
1779         unsigned int to_hash_later;
1780         unsigned int nsg;
1781         int chained;
1782
1783         if (!req_ctx->last && (nbytes + req_ctx->nbuf <= blocksize)) {
1784                 /* Buffer up to one whole block */
1785                 sg_copy_to_buffer(areq->src,
1786                                   sg_count(areq->src, nbytes, &chained),
1787                                   req_ctx->buf + req_ctx->nbuf, nbytes);
1788                 req_ctx->nbuf += nbytes;
1789                 return 0;
1790         }
1791
1792         /* At least (blocksize + 1) bytes are available to hash */
1793         nbytes_to_hash = nbytes + req_ctx->nbuf;
1794         to_hash_later = nbytes_to_hash & (blocksize - 1);
1795
1796         if (req_ctx->last)
1797                 to_hash_later = 0;
1798         else if (to_hash_later)
1799                 /* There is a partial block. Hash the full block(s) now */
1800                 nbytes_to_hash -= to_hash_later;
1801         else {
1802                 /* Keep one block buffered */
1803                 nbytes_to_hash -= blocksize;
1804                 to_hash_later = blocksize;
1805         }
1806
1807         /* Chain in any previously buffered data */
1808         if (req_ctx->nbuf) {
1809                 nsg = (req_ctx->nbuf < nbytes_to_hash) ? 2 : 1;
1810                 sg_init_table(req_ctx->bufsl, nsg);
1811                 sg_set_buf(req_ctx->bufsl, req_ctx->buf, req_ctx->nbuf);
1812                 if (nsg > 1)
1813                         scatterwalk_sg_chain(req_ctx->bufsl, 2, areq->src);
1814                 req_ctx->psrc = req_ctx->bufsl;
1815         } else
1816                 req_ctx->psrc = areq->src;
1817
1818         if (to_hash_later) {
1819                 int nents = sg_count(areq->src, nbytes, &chained);
1820                 sg_copy_end_to_buffer(areq->src, nents,
1821                                       req_ctx->bufnext,
1822                                       to_hash_later,
1823                                       nbytes - to_hash_later);
1824         }
1825         req_ctx->to_hash_later = to_hash_later;
1826
1827         /* Allocate extended descriptor */
1828         edesc = ahash_edesc_alloc(areq, nbytes_to_hash);
1829         if (IS_ERR(edesc))
1830                 return PTR_ERR(edesc);
1831
1832         edesc->desc.hdr = ctx->desc_hdr_template;
1833
1834         /* On last one, request SEC to pad; otherwise continue */
1835         if (req_ctx->last)
1836                 edesc->desc.hdr |= DESC_HDR_MODE0_MDEU_PAD;
1837         else
1838                 edesc->desc.hdr |= DESC_HDR_MODE0_MDEU_CONT;
1839
1840         /* request SEC to INIT hash. */
1841         if (req_ctx->first && !req_ctx->swinit)
1842                 edesc->desc.hdr |= DESC_HDR_MODE0_MDEU_INIT;
1843
1844         /* When the tfm context has a keylen, it's an HMAC.
1845          * A first or last (ie. not middle) descriptor must request HMAC.
1846          */
1847         if (ctx->keylen && (req_ctx->first || req_ctx->last))
1848                 edesc->desc.hdr |= DESC_HDR_MODE0_MDEU_HMAC;
1849
1850         return common_nonsnoop_hash(edesc, areq, nbytes_to_hash,
1851                                     ahash_done);
1852 }
1853
1854 static int ahash_update(struct ahash_request *areq)
1855 {
1856         struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1857
1858         req_ctx->last = 0;
1859
1860         return ahash_process_req(areq, areq->nbytes);
1861 }
1862
1863 static int ahash_final(struct ahash_request *areq)
1864 {
1865         struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1866
1867         req_ctx->last = 1;
1868
1869         return ahash_process_req(areq, 0);
1870 }
1871
1872 static int ahash_finup(struct ahash_request *areq)
1873 {
1874         struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1875
1876         req_ctx->last = 1;
1877
1878         return ahash_process_req(areq, areq->nbytes);
1879 }
1880
1881 static int ahash_digest(struct ahash_request *areq)
1882 {
1883         struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1884         struct crypto_ahash *ahash = crypto_ahash_reqtfm(areq);
1885
1886         ahash->init(areq);
1887         req_ctx->last = 1;
1888
1889         return ahash_process_req(areq, areq->nbytes);
1890 }
1891
1892 struct talitos_alg_template {
1893         u32 type;
1894         union {
1895                 struct crypto_alg crypto;
1896                 struct ahash_alg hash;
1897         } alg;
1898         __be32 desc_hdr_template;
1899 };
1900
1901 static struct talitos_alg_template driver_algs[] = {
1902         /* AEAD algorithms.  These use a single-pass ipsec_esp descriptor */
1903         {       .type = CRYPTO_ALG_TYPE_AEAD,
1904                 .alg.crypto = {
1905                         .cra_name = "authenc(hmac(sha1),cbc(aes))",
1906                         .cra_driver_name = "authenc-hmac-sha1-cbc-aes-talitos",
1907                         .cra_blocksize = AES_BLOCK_SIZE,
1908                         .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
1909                         .cra_type = &crypto_aead_type,
1910                         .cra_aead = {
1911                                 .setkey = aead_setkey,
1912                                 .setauthsize = aead_setauthsize,
1913                                 .encrypt = aead_encrypt,
1914                                 .decrypt = aead_decrypt,
1915                                 .givencrypt = aead_givencrypt,
1916                                 .geniv = "<built-in>",
1917                                 .ivsize = AES_BLOCK_SIZE,
1918                                 .maxauthsize = SHA1_DIGEST_SIZE,
1919                         }
1920                 },
1921                 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
1922                                      DESC_HDR_SEL0_AESU |
1923                                      DESC_HDR_MODE0_AESU_CBC |
1924                                      DESC_HDR_SEL1_MDEUA |
1925                                      DESC_HDR_MODE1_MDEU_INIT |
1926                                      DESC_HDR_MODE1_MDEU_PAD |
1927                                      DESC_HDR_MODE1_MDEU_SHA1_HMAC,
1928         },
1929         {       .type = CRYPTO_ALG_TYPE_AEAD,
1930                 .alg.crypto = {
1931                         .cra_name = "authenc(hmac(sha1),cbc(des3_ede))",
1932                         .cra_driver_name = "authenc-hmac-sha1-cbc-3des-talitos",
1933                         .cra_blocksize = DES3_EDE_BLOCK_SIZE,
1934                         .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
1935                         .cra_type = &crypto_aead_type,
1936                         .cra_aead = {
1937                                 .setkey = aead_setkey,
1938                                 .setauthsize = aead_setauthsize,
1939                                 .encrypt = aead_encrypt,
1940                                 .decrypt = aead_decrypt,
1941                                 .givencrypt = aead_givencrypt,
1942                                 .geniv = "<built-in>",
1943                                 .ivsize = DES3_EDE_BLOCK_SIZE,
1944                                 .maxauthsize = SHA1_DIGEST_SIZE,
1945                         }
1946                 },
1947                 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
1948                                      DESC_HDR_SEL0_DEU |
1949                                      DESC_HDR_MODE0_DEU_CBC |
1950                                      DESC_HDR_MODE0_DEU_3DES |
1951                                      DESC_HDR_SEL1_MDEUA |
1952                                      DESC_HDR_MODE1_MDEU_INIT |
1953                                      DESC_HDR_MODE1_MDEU_PAD |
1954                                      DESC_HDR_MODE1_MDEU_SHA1_HMAC,
1955         },
1956         {       .type = CRYPTO_ALG_TYPE_AEAD,
1957                 .alg.crypto = {
1958                         .cra_name = "authenc(hmac(sha256),cbc(aes))",
1959                         .cra_driver_name = "authenc-hmac-sha256-cbc-aes-talitos",
1960                         .cra_blocksize = AES_BLOCK_SIZE,
1961                         .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
1962                         .cra_type = &crypto_aead_type,
1963                         .cra_aead = {
1964                                 .setkey = aead_setkey,
1965                                 .setauthsize = aead_setauthsize,
1966                                 .encrypt = aead_encrypt,
1967                                 .decrypt = aead_decrypt,
1968                                 .givencrypt = aead_givencrypt,
1969                                 .geniv = "<built-in>",
1970                                 .ivsize = AES_BLOCK_SIZE,
1971                                 .maxauthsize = SHA256_DIGEST_SIZE,
1972                         }
1973                 },
1974                 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
1975                                      DESC_HDR_SEL0_AESU |
1976                                      DESC_HDR_MODE0_AESU_CBC |
1977                                      DESC_HDR_SEL1_MDEUA |
1978                                      DESC_HDR_MODE1_MDEU_INIT |
1979                                      DESC_HDR_MODE1_MDEU_PAD |
1980                                      DESC_HDR_MODE1_MDEU_SHA256_HMAC,
1981         },
1982         {       .type = CRYPTO_ALG_TYPE_AEAD,
1983                 .alg.crypto = {
1984                         .cra_name = "authenc(hmac(sha256),cbc(des3_ede))",
1985                         .cra_driver_name = "authenc-hmac-sha256-cbc-3des-talitos",
1986                         .cra_blocksize = DES3_EDE_BLOCK_SIZE,
1987                         .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
1988                         .cra_type = &crypto_aead_type,
1989                         .cra_aead = {
1990                                 .setkey = aead_setkey,
1991                                 .setauthsize = aead_setauthsize,
1992                                 .encrypt = aead_encrypt,
1993                                 .decrypt = aead_decrypt,
1994                                 .givencrypt = aead_givencrypt,
1995                                 .geniv = "<built-in>",
1996                                 .ivsize = DES3_EDE_BLOCK_SIZE,
1997                                 .maxauthsize = SHA256_DIGEST_SIZE,
1998                         }
1999                 },
2000                 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
2001                                      DESC_HDR_SEL0_DEU |
2002                                      DESC_HDR_MODE0_DEU_CBC |
2003                                      DESC_HDR_MODE0_DEU_3DES |
2004                                      DESC_HDR_SEL1_MDEUA |
2005                                      DESC_HDR_MODE1_MDEU_INIT |
2006                                      DESC_HDR_MODE1_MDEU_PAD |
2007                                      DESC_HDR_MODE1_MDEU_SHA256_HMAC,
2008         },
2009         {       .type = CRYPTO_ALG_TYPE_AEAD,
2010                 .alg.crypto = {
2011                         .cra_name = "authenc(hmac(md5),cbc(aes))",
2012                         .cra_driver_name = "authenc-hmac-md5-cbc-aes-talitos",
2013                         .cra_blocksize = AES_BLOCK_SIZE,
2014                         .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
2015                         .cra_type = &crypto_aead_type,
2016                         .cra_aead = {
2017                                 .setkey = aead_setkey,
2018                                 .setauthsize = aead_setauthsize,
2019                                 .encrypt = aead_encrypt,
2020                                 .decrypt = aead_decrypt,
2021                                 .givencrypt = aead_givencrypt,
2022                                 .geniv = "<built-in>",
2023                                 .ivsize = AES_BLOCK_SIZE,
2024                                 .maxauthsize = MD5_DIGEST_SIZE,
2025                         }
2026                 },
2027                 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
2028                                      DESC_HDR_SEL0_AESU |
2029                                      DESC_HDR_MODE0_AESU_CBC |
2030                                      DESC_HDR_SEL1_MDEUA |
2031                                      DESC_HDR_MODE1_MDEU_INIT |
2032                                      DESC_HDR_MODE1_MDEU_PAD |
2033                                      DESC_HDR_MODE1_MDEU_MD5_HMAC,
2034         },
2035         {       .type = CRYPTO_ALG_TYPE_AEAD,
2036                 .alg.crypto = {
2037                         .cra_name = "authenc(hmac(md5),cbc(des3_ede))",
2038                         .cra_driver_name = "authenc-hmac-md5-cbc-3des-talitos",
2039                         .cra_blocksize = DES3_EDE_BLOCK_SIZE,
2040                         .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
2041                         .cra_type = &crypto_aead_type,
2042                         .cra_aead = {
2043                                 .setkey = aead_setkey,
2044                                 .setauthsize = aead_setauthsize,
2045                                 .encrypt = aead_encrypt,
2046                                 .decrypt = aead_decrypt,
2047                                 .givencrypt = aead_givencrypt,
2048                                 .geniv = "<built-in>",
2049                                 .ivsize = DES3_EDE_BLOCK_SIZE,
2050                                 .maxauthsize = MD5_DIGEST_SIZE,
2051                         }
2052                 },
2053                 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
2054                                      DESC_HDR_SEL0_DEU |
2055                                      DESC_HDR_MODE0_DEU_CBC |
2056                                      DESC_HDR_MODE0_DEU_3DES |
2057                                      DESC_HDR_SEL1_MDEUA |
2058                                      DESC_HDR_MODE1_MDEU_INIT |
2059                                      DESC_HDR_MODE1_MDEU_PAD |
2060                                      DESC_HDR_MODE1_MDEU_MD5_HMAC,
2061         },
2062         /* ABLKCIPHER algorithms. */
2063         {       .type = CRYPTO_ALG_TYPE_ABLKCIPHER,
2064                 .alg.crypto = {
2065                         .cra_name = "cbc(aes)",
2066                         .cra_driver_name = "cbc-aes-talitos",
2067                         .cra_blocksize = AES_BLOCK_SIZE,
2068                         .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
2069                                      CRYPTO_ALG_ASYNC,
2070                         .cra_type = &crypto_ablkcipher_type,
2071                         .cra_ablkcipher = {
2072                                 .setkey = ablkcipher_setkey,
2073                                 .encrypt = ablkcipher_encrypt,
2074                                 .decrypt = ablkcipher_decrypt,
2075                                 .geniv = "eseqiv",
2076                                 .min_keysize = AES_MIN_KEY_SIZE,
2077                                 .max_keysize = AES_MAX_KEY_SIZE,
2078                                 .ivsize = AES_BLOCK_SIZE,
2079                         }
2080                 },
2081                 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2082                                      DESC_HDR_SEL0_AESU |
2083                                      DESC_HDR_MODE0_AESU_CBC,
2084         },
2085         {       .type = CRYPTO_ALG_TYPE_ABLKCIPHER,
2086                 .alg.crypto = {
2087                         .cra_name = "cbc(des3_ede)",
2088                         .cra_driver_name = "cbc-3des-talitos",
2089                         .cra_blocksize = DES3_EDE_BLOCK_SIZE,
2090                         .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
2091                                      CRYPTO_ALG_ASYNC,
2092                         .cra_type = &crypto_ablkcipher_type,
2093                         .cra_ablkcipher = {
2094                                 .setkey = ablkcipher_setkey,
2095                                 .encrypt = ablkcipher_encrypt,
2096                                 .decrypt = ablkcipher_decrypt,
2097                                 .geniv = "eseqiv",
2098                                 .min_keysize = DES3_EDE_KEY_SIZE,
2099                                 .max_keysize = DES3_EDE_KEY_SIZE,
2100                                 .ivsize = DES3_EDE_BLOCK_SIZE,
2101                         }
2102                 },
2103                 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2104                                      DESC_HDR_SEL0_DEU |
2105                                      DESC_HDR_MODE0_DEU_CBC |
2106                                      DESC_HDR_MODE0_DEU_3DES,
2107         },
2108         /* AHASH algorithms. */
2109         {       .type = CRYPTO_ALG_TYPE_AHASH,
2110                 .alg.hash = {
2111                         .init = ahash_init,
2112                         .update = ahash_update,
2113                         .final = ahash_final,
2114                         .finup = ahash_finup,
2115                         .digest = ahash_digest,
2116                         .halg.digestsize = MD5_DIGEST_SIZE,
2117                         .halg.base = {
2118                                 .cra_name = "md5",
2119                                 .cra_driver_name = "md5-talitos",
2120                                 .cra_blocksize = MD5_BLOCK_SIZE,
2121                                 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2122                                              CRYPTO_ALG_ASYNC,
2123                                 .cra_type = &crypto_ahash_type
2124                         }
2125                 },
2126                 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2127                                      DESC_HDR_SEL0_MDEUA |
2128                                      DESC_HDR_MODE0_MDEU_MD5,
2129         },
2130         {       .type = CRYPTO_ALG_TYPE_AHASH,
2131                 .alg.hash = {
2132                         .init = ahash_init,
2133                         .update = ahash_update,
2134                         .final = ahash_final,
2135                         .finup = ahash_finup,
2136                         .digest = ahash_digest,
2137                         .halg.digestsize = SHA1_DIGEST_SIZE,
2138                         .halg.base = {
2139                                 .cra_name = "sha1",
2140                                 .cra_driver_name = "sha1-talitos",
2141                                 .cra_blocksize = SHA1_BLOCK_SIZE,
2142                                 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2143                                              CRYPTO_ALG_ASYNC,
2144                                 .cra_type = &crypto_ahash_type
2145                         }
2146                 },
2147                 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2148                                      DESC_HDR_SEL0_MDEUA |
2149                                      DESC_HDR_MODE0_MDEU_SHA1,
2150         },
2151         {       .type = CRYPTO_ALG_TYPE_AHASH,
2152                 .alg.hash = {
2153                         .init = ahash_init,
2154                         .update = ahash_update,
2155                         .final = ahash_final,
2156                         .finup = ahash_finup,
2157                         .digest = ahash_digest,
2158                         .halg.digestsize = SHA224_DIGEST_SIZE,
2159                         .halg.base = {
2160                                 .cra_name = "sha224",
2161                                 .cra_driver_name = "sha224-talitos",
2162                                 .cra_blocksize = SHA224_BLOCK_SIZE,
2163                                 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2164                                              CRYPTO_ALG_ASYNC,
2165                                 .cra_type = &crypto_ahash_type
2166                         }
2167                 },
2168                 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2169                                      DESC_HDR_SEL0_MDEUA |
2170                                      DESC_HDR_MODE0_MDEU_SHA224,
2171         },
2172         {       .type = CRYPTO_ALG_TYPE_AHASH,
2173                 .alg.hash = {
2174                         .init = ahash_init,
2175                         .update = ahash_update,
2176                         .final = ahash_final,
2177                         .finup = ahash_finup,
2178                         .digest = ahash_digest,
2179                         .halg.digestsize = SHA256_DIGEST_SIZE,
2180                         .halg.base = {
2181                                 .cra_name = "sha256",
2182                                 .cra_driver_name = "sha256-talitos",
2183                                 .cra_blocksize = SHA256_BLOCK_SIZE,
2184                                 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2185                                              CRYPTO_ALG_ASYNC,
2186                                 .cra_type = &crypto_ahash_type
2187                         }
2188                 },
2189                 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2190                                      DESC_HDR_SEL0_MDEUA |
2191                                      DESC_HDR_MODE0_MDEU_SHA256,
2192         },
2193         {       .type = CRYPTO_ALG_TYPE_AHASH,
2194                 .alg.hash = {
2195                         .init = ahash_init,
2196                         .update = ahash_update,
2197                         .final = ahash_final,
2198                         .finup = ahash_finup,
2199                         .digest = ahash_digest,
2200                         .halg.digestsize = SHA384_DIGEST_SIZE,
2201                         .halg.base = {
2202                                 .cra_name = "sha384",
2203                                 .cra_driver_name = "sha384-talitos",
2204                                 .cra_blocksize = SHA384_BLOCK_SIZE,
2205                                 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2206                                              CRYPTO_ALG_ASYNC,
2207                                 .cra_type = &crypto_ahash_type
2208                         }
2209                 },
2210                 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2211                                      DESC_HDR_SEL0_MDEUB |
2212                                      DESC_HDR_MODE0_MDEUB_SHA384,
2213         },
2214         {       .type = CRYPTO_ALG_TYPE_AHASH,
2215                 .alg.hash = {
2216                         .init = ahash_init,
2217                         .update = ahash_update,
2218                         .final = ahash_final,
2219                         .finup = ahash_finup,
2220                         .digest = ahash_digest,
2221                         .halg.digestsize = SHA512_DIGEST_SIZE,
2222                         .halg.base = {
2223                                 .cra_name = "sha512",
2224                                 .cra_driver_name = "sha512-talitos",
2225                                 .cra_blocksize = SHA512_BLOCK_SIZE,
2226                                 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2227                                              CRYPTO_ALG_ASYNC,
2228                                 .cra_type = &crypto_ahash_type
2229                         }
2230                 },
2231                 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2232                                      DESC_HDR_SEL0_MDEUB |
2233                                      DESC_HDR_MODE0_MDEUB_SHA512,
2234         },
2235 };
2236
2237 struct talitos_crypto_alg {
2238         struct list_head entry;
2239         struct device *dev;
2240         struct talitos_alg_template algt;
2241 };
2242
2243 static int talitos_cra_init(struct crypto_tfm *tfm)
2244 {
2245         struct crypto_alg *alg = tfm->__crt_alg;
2246         struct talitos_crypto_alg *talitos_alg;
2247         struct talitos_ctx *ctx = crypto_tfm_ctx(tfm);
2248
2249         if ((alg->cra_flags & CRYPTO_ALG_TYPE_MASK) == CRYPTO_ALG_TYPE_AHASH)
2250                 talitos_alg = container_of(__crypto_ahash_alg(alg),
2251                                            struct talitos_crypto_alg,
2252                                            algt.alg.hash);
2253         else
2254                 talitos_alg = container_of(alg, struct talitos_crypto_alg,
2255                                            algt.alg.crypto);
2256
2257         /* update context with ptr to dev */
2258         ctx->dev = talitos_alg->dev;
2259
2260         /* copy descriptor header template value */
2261         ctx->desc_hdr_template = talitos_alg->algt.desc_hdr_template;
2262
2263         return 0;
2264 }
2265
2266 static int talitos_cra_init_aead(struct crypto_tfm *tfm)
2267 {
2268         struct talitos_ctx *ctx = crypto_tfm_ctx(tfm);
2269
2270         talitos_cra_init(tfm);
2271
2272         /* random first IV */
2273         get_random_bytes(ctx->iv, TALITOS_MAX_IV_LENGTH);
2274
2275         return 0;
2276 }
2277
2278 static int talitos_cra_init_ahash(struct crypto_tfm *tfm)
2279 {
2280         struct talitos_ctx *ctx = crypto_tfm_ctx(tfm);
2281
2282         talitos_cra_init(tfm);
2283
2284         ctx->keylen = 0;
2285         crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
2286                                  sizeof(struct talitos_ahash_req_ctx));
2287
2288         return 0;
2289 }
2290
2291 /*
2292  * given the alg's descriptor header template, determine whether descriptor
2293  * type and primary/secondary execution units required match the hw
2294  * capabilities description provided in the device tree node.
2295  */
2296 static int hw_supports(struct device *dev, __be32 desc_hdr_template)
2297 {
2298         struct talitos_private *priv = dev_get_drvdata(dev);
2299         int ret;
2300
2301         ret = (1 << DESC_TYPE(desc_hdr_template) & priv->desc_types) &&
2302               (1 << PRIMARY_EU(desc_hdr_template) & priv->exec_units);
2303
2304         if (SECONDARY_EU(desc_hdr_template))
2305                 ret = ret && (1 << SECONDARY_EU(desc_hdr_template)
2306                               & priv->exec_units);
2307
2308         return ret;
2309 }
2310
2311 static int talitos_remove(struct of_device *ofdev)
2312 {
2313         struct device *dev = &ofdev->dev;
2314         struct talitos_private *priv = dev_get_drvdata(dev);
2315         struct talitos_crypto_alg *t_alg, *n;
2316         int i;
2317
2318         list_for_each_entry_safe(t_alg, n, &priv->alg_list, entry) {
2319                 switch (t_alg->algt.type) {
2320                 case CRYPTO_ALG_TYPE_ABLKCIPHER:
2321                 case CRYPTO_ALG_TYPE_AEAD:
2322                         crypto_unregister_alg(&t_alg->algt.alg.crypto);
2323                         break;
2324                 case CRYPTO_ALG_TYPE_AHASH:
2325                         crypto_unregister_ahash(&t_alg->algt.alg.hash);
2326                         break;
2327                 }
2328                 list_del(&t_alg->entry);
2329                 kfree(t_alg);
2330         }
2331
2332         if (hw_supports(dev, DESC_HDR_SEL0_RNG))
2333                 talitos_unregister_rng(dev);
2334
2335         for (i = 0; i < priv->num_channels; i++)
2336                 if (priv->chan[i].fifo)
2337                         kfree(priv->chan[i].fifo);
2338
2339         kfree(priv->chan);
2340
2341         if (priv->irq != NO_IRQ) {
2342                 free_irq(priv->irq, dev);
2343                 irq_dispose_mapping(priv->irq);
2344         }
2345
2346         tasklet_kill(&priv->done_task);
2347
2348         iounmap(priv->reg);
2349
2350         dev_set_drvdata(dev, NULL);
2351
2352         kfree(priv);
2353
2354         return 0;
2355 }
2356
2357 static struct talitos_crypto_alg *talitos_alg_alloc(struct device *dev,
2358                                                     struct talitos_alg_template
2359                                                            *template)
2360 {
2361         struct talitos_private *priv = dev_get_drvdata(dev);
2362         struct talitos_crypto_alg *t_alg;
2363         struct crypto_alg *alg;
2364
2365         t_alg = kzalloc(sizeof(struct talitos_crypto_alg), GFP_KERNEL);
2366         if (!t_alg)
2367                 return ERR_PTR(-ENOMEM);
2368
2369         t_alg->algt = *template;
2370
2371         switch (t_alg->algt.type) {
2372         case CRYPTO_ALG_TYPE_ABLKCIPHER:
2373                 alg = &t_alg->algt.alg.crypto;
2374                 alg->cra_init = talitos_cra_init;
2375                 break;
2376         case CRYPTO_ALG_TYPE_AEAD:
2377                 alg = &t_alg->algt.alg.crypto;
2378                 alg->cra_init = talitos_cra_init_aead;
2379                 break;
2380         case CRYPTO_ALG_TYPE_AHASH:
2381                 alg = &t_alg->algt.alg.hash.halg.base;
2382                 alg->cra_init = talitos_cra_init_ahash;
2383                 if (!(priv->features & TALITOS_FTR_SHA224_HWINIT) &&
2384                     !strcmp(alg->cra_name, "sha224")) {
2385                         t_alg->algt.alg.hash.init = ahash_init_sha224_swinit;
2386                         t_alg->algt.desc_hdr_template =
2387                                         DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2388                                         DESC_HDR_SEL0_MDEUA |
2389                                         DESC_HDR_MODE0_MDEU_SHA256;
2390                 }
2391                 break;
2392         }
2393
2394         alg->cra_module = THIS_MODULE;
2395         alg->cra_priority = TALITOS_CRA_PRIORITY;
2396         alg->cra_alignmask = 0;
2397         alg->cra_ctxsize = sizeof(struct talitos_ctx);
2398
2399         t_alg->dev = dev;
2400
2401         return t_alg;
2402 }
2403
2404 static int talitos_probe(struct of_device *ofdev,
2405                          const struct of_device_id *match)
2406 {
2407         struct device *dev = &ofdev->dev;
2408         struct device_node *np = ofdev->dev.of_node;
2409         struct talitos_private *priv;
2410         const unsigned int *prop;
2411         int i, err;
2412
2413         priv = kzalloc(sizeof(struct talitos_private), GFP_KERNEL);
2414         if (!priv)
2415                 return -ENOMEM;
2416
2417         dev_set_drvdata(dev, priv);
2418
2419         priv->ofdev = ofdev;
2420
2421         tasklet_init(&priv->done_task, talitos_done, (unsigned long)dev);
2422
2423         INIT_LIST_HEAD(&priv->alg_list);
2424
2425         priv->irq = irq_of_parse_and_map(np, 0);
2426
2427         if (priv->irq == NO_IRQ) {
2428                 dev_err(dev, "failed to map irq\n");
2429                 err = -EINVAL;
2430                 goto err_out;
2431         }
2432
2433         /* get the irq line */
2434         err = request_irq(priv->irq, talitos_interrupt, 0,
2435                           dev_driver_string(dev), dev);
2436         if (err) {
2437                 dev_err(dev, "failed to request irq %d\n", priv->irq);
2438                 irq_dispose_mapping(priv->irq);
2439                 priv->irq = NO_IRQ;
2440                 goto err_out;
2441         }
2442
2443         priv->reg = of_iomap(np, 0);
2444         if (!priv->reg) {
2445                 dev_err(dev, "failed to of_iomap\n");
2446                 err = -ENOMEM;
2447                 goto err_out;
2448         }
2449
2450         /* get SEC version capabilities from device tree */
2451         prop = of_get_property(np, "fsl,num-channels", NULL);
2452         if (prop)
2453                 priv->num_channels = *prop;
2454
2455         prop = of_get_property(np, "fsl,channel-fifo-len", NULL);
2456         if (prop)
2457                 priv->chfifo_len = *prop;
2458
2459         prop = of_get_property(np, "fsl,exec-units-mask", NULL);
2460         if (prop)
2461                 priv->exec_units = *prop;
2462
2463         prop = of_get_property(np, "fsl,descriptor-types-mask", NULL);
2464         if (prop)
2465                 priv->desc_types = *prop;
2466
2467         if (!is_power_of_2(priv->num_channels) || !priv->chfifo_len ||
2468             !priv->exec_units || !priv->desc_types) {
2469                 dev_err(dev, "invalid property data in device tree node\n");
2470                 err = -EINVAL;
2471                 goto err_out;
2472         }
2473
2474         if (of_device_is_compatible(np, "fsl,sec3.0"))
2475                 priv->features |= TALITOS_FTR_SRC_LINK_TBL_LEN_INCLUDES_EXTENT;
2476
2477         if (of_device_is_compatible(np, "fsl,sec2.1"))
2478                 priv->features |= TALITOS_FTR_HW_AUTH_CHECK |
2479                                   TALITOS_FTR_SHA224_HWINIT;
2480
2481         priv->chan = kzalloc(sizeof(struct talitos_channel) *
2482                              priv->num_channels, GFP_KERNEL);
2483         if (!priv->chan) {
2484                 dev_err(dev, "failed to allocate channel management space\n");
2485                 err = -ENOMEM;
2486                 goto err_out;
2487         }
2488
2489         for (i = 0; i < priv->num_channels; i++) {
2490                 spin_lock_init(&priv->chan[i].head_lock);
2491                 spin_lock_init(&priv->chan[i].tail_lock);
2492         }
2493
2494         priv->fifo_len = roundup_pow_of_two(priv->chfifo_len);
2495
2496         for (i = 0; i < priv->num_channels; i++) {
2497                 priv->chan[i].fifo = kzalloc(sizeof(struct talitos_request) *
2498                                              priv->fifo_len, GFP_KERNEL);
2499                 if (!priv->chan[i].fifo) {
2500                         dev_err(dev, "failed to allocate request fifo %d\n", i);
2501                         err = -ENOMEM;
2502                         goto err_out;
2503                 }
2504         }
2505
2506         for (i = 0; i < priv->num_channels; i++)
2507                 atomic_set(&priv->chan[i].submit_count,
2508                            -(priv->chfifo_len - 1));
2509
2510         dma_set_mask(dev, DMA_BIT_MASK(36));
2511
2512         /* reset and initialize the h/w */
2513         err = init_device(dev);
2514         if (err) {
2515                 dev_err(dev, "failed to initialize device\n");
2516                 goto err_out;
2517         }
2518
2519         /* register the RNG, if available */
2520         if (hw_supports(dev, DESC_HDR_SEL0_RNG)) {
2521                 err = talitos_register_rng(dev);
2522                 if (err) {
2523                         dev_err(dev, "failed to register hwrng: %d\n", err);
2524                         goto err_out;
2525                 } else
2526                         dev_info(dev, "hwrng\n");
2527         }
2528
2529         /* register crypto algorithms the device supports */
2530         for (i = 0; i < ARRAY_SIZE(driver_algs); i++) {
2531                 if (hw_supports(dev, driver_algs[i].desc_hdr_template)) {
2532                         struct talitos_crypto_alg *t_alg;
2533                         char *name = NULL;
2534
2535                         t_alg = talitos_alg_alloc(dev, &driver_algs[i]);
2536                         if (IS_ERR(t_alg)) {
2537                                 err = PTR_ERR(t_alg);
2538                                 goto err_out;
2539                         }
2540
2541                         switch (t_alg->algt.type) {
2542                         case CRYPTO_ALG_TYPE_ABLKCIPHER:
2543                         case CRYPTO_ALG_TYPE_AEAD:
2544                                 err = crypto_register_alg(
2545                                                 &t_alg->algt.alg.crypto);
2546                                 name = t_alg->algt.alg.crypto.cra_driver_name;
2547                                 break;
2548                         case CRYPTO_ALG_TYPE_AHASH:
2549                                 err = crypto_register_ahash(
2550                                                 &t_alg->algt.alg.hash);
2551                                 name =
2552                                  t_alg->algt.alg.hash.halg.base.cra_driver_name;
2553                                 break;
2554                         }
2555                         if (err) {
2556                                 dev_err(dev, "%s alg registration failed\n",
2557                                         name);
2558                                 kfree(t_alg);
2559                         } else {
2560                                 list_add_tail(&t_alg->entry, &priv->alg_list);
2561                                 dev_info(dev, "%s\n", name);
2562                         }
2563                 }
2564         }
2565
2566         return 0;
2567
2568 err_out:
2569         talitos_remove(ofdev);
2570
2571         return err;
2572 }
2573
2574 static const struct of_device_id talitos_match[] = {
2575         {
2576                 .compatible = "fsl,sec2.0",
2577         },
2578         {},
2579 };
2580 MODULE_DEVICE_TABLE(of, talitos_match);
2581
2582 static struct of_platform_driver talitos_driver = {
2583         .driver = {
2584                 .name = "talitos",
2585                 .owner = THIS_MODULE,
2586                 .of_match_table = talitos_match,
2587         },
2588         .probe = talitos_probe,
2589         .remove = talitos_remove,
2590 };
2591
2592 static int __init talitos_init(void)
2593 {
2594         return of_register_platform_driver(&talitos_driver);
2595 }
2596 module_init(talitos_init);
2597
2598 static void __exit talitos_exit(void)
2599 {
2600         of_unregister_platform_driver(&talitos_driver);
2601 }
2602 module_exit(talitos_exit);
2603
2604 MODULE_LICENSE("GPL");
2605 MODULE_AUTHOR("Kim Phillips <kim.phillips@freescale.com>");
2606 MODULE_DESCRIPTION("Freescale integrated security engine (SEC) driver");