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drm/i915: kill duplicated/unneeded register defines
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / crypto / talitos.c
blob4bcd825b573940b99f50add143d22bfed4f9f373
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 platform_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 platform_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 platform_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");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree