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vlan: Add features for stacked vlan device
[linux-2.6/btrfs-unstable.git] / drivers / crypto / talitos.c
blobebbae8d3ce0dcb1aa7fc0e1fcc99c465f9731fb0
1 /*
2 * talitos - Freescale Integrated Security Engine (SEC) device driver
3 *
4 * Copyright (c) 2008-2011 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_address.h>
36 #include <linux/of_irq.h>
37 #include <linux/of_platform.h>
38 #include <linux/dma-mapping.h>
39 #include <linux/io.h>
40 #include <linux/spinlock.h>
41 #include <linux/rtnetlink.h>
42 #include <linux/slab.h>
43
44 #include <crypto/algapi.h>
45 #include <crypto/aes.h>
46 #include <crypto/des.h>
47 #include <crypto/sha.h>
48 #include <crypto/md5.h>
49 #include <crypto/aead.h>
50 #include <crypto/authenc.h>
51 #include <crypto/skcipher.h>
52 #include <crypto/hash.h>
53 #include <crypto/internal/hash.h>
54 #include <crypto/scatterwalk.h>
55
56 #include "talitos.h"
57
58 static void to_talitos_ptr(struct talitos_ptr *talitos_ptr, dma_addr_t dma_addr)
59 {
60 talitos_ptr->ptr = cpu_to_be32(lower_32_bits(dma_addr));
61 talitos_ptr->eptr = upper_32_bits(dma_addr);
62 }
63
64 /*
65 * map virtual single (contiguous) pointer to h/w descriptor pointer
66 */
67 static void map_single_talitos_ptr(struct device *dev,
68 struct talitos_ptr *talitos_ptr,
69 unsigned short len, void *data,
70 unsigned char extent,
71 enum dma_data_direction dir)
72 {
73 dma_addr_t dma_addr = dma_map_single(dev, data, len, dir);
74
75 talitos_ptr->len = cpu_to_be16(len);
76 to_talitos_ptr(talitos_ptr, dma_addr);
77 talitos_ptr->j_extent = extent;
78 }
79
80 /*
81 * unmap bus single (contiguous) h/w descriptor pointer
82 */
83 static void unmap_single_talitos_ptr(struct device *dev,
84 struct talitos_ptr *talitos_ptr,
85 enum dma_data_direction dir)
86 {
87 dma_unmap_single(dev, be32_to_cpu(talitos_ptr->ptr),
88 be16_to_cpu(talitos_ptr->len), dir);
89 }
90
91 static int reset_channel(struct device *dev, int ch)
92 {
93 struct talitos_private *priv = dev_get_drvdata(dev);
94 unsigned int timeout = TALITOS_TIMEOUT;
95
96 setbits32(priv->chan[ch].reg + TALITOS_CCCR, TALITOS_CCCR_RESET);
97
98 while ((in_be32(priv->chan[ch].reg + TALITOS_CCCR) & TALITOS_CCCR_RESET)
99 && --timeout)
100 cpu_relax();
101
102 if (timeout == 0) {
103 dev_err(dev, "failed to reset channel %d\n", ch);
104 return -EIO;
105 }
106
107 /* set 36-bit addressing, done writeback enable and done IRQ enable */
108 setbits32(priv->chan[ch].reg + TALITOS_CCCR_LO, TALITOS_CCCR_LO_EAE |
109 TALITOS_CCCR_LO_CDWE | TALITOS_CCCR_LO_CDIE);
110
111 /* and ICCR writeback, if available */
112 if (priv->features & TALITOS_FTR_HW_AUTH_CHECK)
113 setbits32(priv->chan[ch].reg + TALITOS_CCCR_LO,
114 TALITOS_CCCR_LO_IWSE);
115
116 return 0;
117 }
118
119 static int reset_device(struct device *dev)
120 {
121 struct talitos_private *priv = dev_get_drvdata(dev);
122 unsigned int timeout = TALITOS_TIMEOUT;
123 u32 mcr = TALITOS_MCR_SWR;
124
125 setbits32(priv->reg + TALITOS_MCR, mcr);
126
127 while ((in_be32(priv->reg + TALITOS_MCR) & TALITOS_MCR_SWR)
128 && --timeout)
129 cpu_relax();
130
131 if (priv->irq[1]) {
132 mcr = TALITOS_MCR_RCA1 | TALITOS_MCR_RCA3;
133 setbits32(priv->reg + TALITOS_MCR, mcr);
134 }
135
136 if (timeout == 0) {
137 dev_err(dev, "failed to reset device\n");
138 return -EIO;
139 }
140
141 return 0;
142 }
143
144 /*
145 * Reset and initialize the device
146 */
147 static int init_device(struct device *dev)
148 {
149 struct talitos_private *priv = dev_get_drvdata(dev);
150 int ch, err;
151
152 /*
153 * Master reset
154 * errata documentation: warning: certain SEC interrupts
155 * are not fully cleared by writing the MCR:SWR bit,
156 * set bit twice to completely reset
157 */
158 err = reset_device(dev);
159 if (err)
160 return err;
161
162 err = reset_device(dev);
163 if (err)
164 return err;
165
166 /* reset channels */
167 for (ch = 0; ch < priv->num_channels; ch++) {
168 err = reset_channel(dev, ch);
169 if (err)
170 return err;
171 }
172
173 /* enable channel done and error interrupts */
174 setbits32(priv->reg + TALITOS_IMR, TALITOS_IMR_INIT);
175 setbits32(priv->reg + TALITOS_IMR_LO, TALITOS_IMR_LO_INIT);
176
177 /* disable integrity check error interrupts (use writeback instead) */
178 if (priv->features & TALITOS_FTR_HW_AUTH_CHECK)
179 setbits32(priv->reg + TALITOS_MDEUICR_LO,
180 TALITOS_MDEUICR_LO_ICE);
181
182 return 0;
183 }
184
185 /**
186 * talitos_submit - submits a descriptor to the device for processing
187 * @dev: the SEC device to be used
188 * @ch: the SEC device channel to be used
189 * @desc: the descriptor to be processed by the device
190 * @callback: whom to call when processing is complete
191 * @context: a handle for use by caller (optional)
192 *
193 * desc must contain valid dma-mapped (bus physical) address pointers.
194 * callback must check err and feedback in descriptor header
195 * for device processing status.
196 */
197 int talitos_submit(struct device *dev, int ch, struct talitos_desc *desc,
198 void (*callback)(struct device *dev,
199 struct talitos_desc *desc,
200 void *context, int error),
201 void *context)
202 {
203 struct talitos_private *priv = dev_get_drvdata(dev);
204 struct talitos_request *request;
205 unsigned long flags;
206 int head;
207
208 spin_lock_irqsave(&priv->chan[ch].head_lock, flags);
209
210 if (!atomic_inc_not_zero(&priv->chan[ch].submit_count)) {
211 /* h/w fifo is full */
212 spin_unlock_irqrestore(&priv->chan[ch].head_lock, flags);
213 return -EAGAIN;
214 }
215
216 head = priv->chan[ch].head;
217 request = &priv->chan[ch].fifo[head];
218
219 /* map descriptor and save caller data */
220 request->dma_desc = dma_map_single(dev, desc, sizeof(*desc),
221 DMA_BIDIRECTIONAL);
222 request->callback = callback;
223 request->context = context;
224
225 /* increment fifo head */
226 priv->chan[ch].head = (priv->chan[ch].head + 1) & (priv->fifo_len - 1);
227
228 smp_wmb();
229 request->desc = desc;
230
231 /* GO! */
232 wmb();
233 out_be32(priv->chan[ch].reg + TALITOS_FF,
234 upper_32_bits(request->dma_desc));
235 out_be32(priv->chan[ch].reg + TALITOS_FF_LO,
236 lower_32_bits(request->dma_desc));
237
238 spin_unlock_irqrestore(&priv->chan[ch].head_lock, flags);
239
240 return -EINPROGRESS;
241 }
242 EXPORT_SYMBOL(talitos_submit);
243
244 /*
245 * process what was done, notify callback of error if not
246 */
247 static void flush_channel(struct device *dev, int ch, int error, int reset_ch)
248 {
249 struct talitos_private *priv = dev_get_drvdata(dev);
250 struct talitos_request *request, saved_req;
251 unsigned long flags;
252 int tail, status;
253
254 spin_lock_irqsave(&priv->chan[ch].tail_lock, flags);
255
256 tail = priv->chan[ch].tail;
257 while (priv->chan[ch].fifo[tail].desc) {
258 request = &priv->chan[ch].fifo[tail];
259
260 /* descriptors with their done bits set don't get the error */
261 rmb();
262 if ((request->desc->hdr & DESC_HDR_DONE) == DESC_HDR_DONE)
263 status = 0;
264 else
265 if (!error)
266 break;
267 else
268 status = error;
269
270 dma_unmap_single(dev, request->dma_desc,
271 sizeof(struct talitos_desc),
272 DMA_BIDIRECTIONAL);
273
274 /* copy entries so we can call callback outside lock */
275 saved_req.desc = request->desc;
276 saved_req.callback = request->callback;
277 saved_req.context = request->context;
278
279 /* release request entry in fifo */
280 smp_wmb();
281 request->desc = NULL;
282
283 /* increment fifo tail */
284 priv->chan[ch].tail = (tail + 1) & (priv->fifo_len - 1);
285
286 spin_unlock_irqrestore(&priv->chan[ch].tail_lock, flags);
287
288 atomic_dec(&priv->chan[ch].submit_count);
289
290 saved_req.callback(dev, saved_req.desc, saved_req.context,
291 status);
292 /* channel may resume processing in single desc error case */
293 if (error && !reset_ch && status == error)
294 return;
295 spin_lock_irqsave(&priv->chan[ch].tail_lock, flags);
296 tail = priv->chan[ch].tail;
297 }
298
299 spin_unlock_irqrestore(&priv->chan[ch].tail_lock, flags);
300 }
301
302 /*
303 * process completed requests for channels that have done status
304 */
305 #define DEF_TALITOS_DONE(name, ch_done_mask) \
306 static void talitos_done_##name(unsigned long data) \
307 { \
308 struct device *dev = (struct device *)data; \
309 struct talitos_private *priv = dev_get_drvdata(dev); \
310 unsigned long flags; \
311 \
312 if (ch_done_mask & 1) \
313 flush_channel(dev, 0, 0, 0); \
314 if (priv->num_channels == 1) \
315 goto out; \
316 if (ch_done_mask & (1 << 2)) \
317 flush_channel(dev, 1, 0, 0); \
318 if (ch_done_mask & (1 << 4)) \
319 flush_channel(dev, 2, 0, 0); \
320 if (ch_done_mask & (1 << 6)) \
321 flush_channel(dev, 3, 0, 0); \
322 \
323 out: \
324 /* At this point, all completed channels have been processed */ \
325 /* Unmask done interrupts for channels completed later on. */ \
326 spin_lock_irqsave(&priv->reg_lock, flags); \
327 setbits32(priv->reg + TALITOS_IMR, ch_done_mask); \
328 setbits32(priv->reg + TALITOS_IMR_LO, TALITOS_IMR_LO_INIT); \
329 spin_unlock_irqrestore(&priv->reg_lock, flags); \
330 }
331 DEF_TALITOS_DONE(4ch, TALITOS_ISR_4CHDONE)
332 DEF_TALITOS_DONE(ch0_2, TALITOS_ISR_CH_0_2_DONE)
333 DEF_TALITOS_DONE(ch1_3, TALITOS_ISR_CH_1_3_DONE)
334
335 /*
336 * locate current (offending) descriptor
337 */
338 static u32 current_desc_hdr(struct device *dev, int ch)
339 {
340 struct talitos_private *priv = dev_get_drvdata(dev);
341 int tail, iter;
342 dma_addr_t cur_desc;
343
344 cur_desc = ((u64)in_be32(priv->chan[ch].reg + TALITOS_CDPR)) << 32;
345 cur_desc |= in_be32(priv->chan[ch].reg + TALITOS_CDPR_LO);
346
347 if (!cur_desc) {
348 dev_err(dev, "CDPR is NULL, giving up search for offending descriptor\n");
349 return 0;
350 }
351
352 tail = priv->chan[ch].tail;
353
354 iter = tail;
355 while (priv->chan[ch].fifo[iter].dma_desc != cur_desc) {
356 iter = (iter + 1) & (priv->fifo_len - 1);
357 if (iter == tail) {
358 dev_err(dev, "couldn't locate current descriptor\n");
359 return 0;
360 }
361 }
362
363 return priv->chan[ch].fifo[iter].desc->hdr;
364 }
365
366 /*
367 * user diagnostics; report root cause of error based on execution unit status
368 */
369 static void report_eu_error(struct device *dev, int ch, u32 desc_hdr)
370 {
371 struct talitos_private *priv = dev_get_drvdata(dev);
372 int i;
373
374 if (!desc_hdr)
375 desc_hdr = in_be32(priv->chan[ch].reg + TALITOS_DESCBUF);
376
377 switch (desc_hdr & DESC_HDR_SEL0_MASK) {
378 case DESC_HDR_SEL0_AFEU:
379 dev_err(dev, "AFEUISR 0x%08x_%08x\n",
380 in_be32(priv->reg + TALITOS_AFEUISR),
381 in_be32(priv->reg + TALITOS_AFEUISR_LO));
382 break;
383 case DESC_HDR_SEL0_DEU:
384 dev_err(dev, "DEUISR 0x%08x_%08x\n",
385 in_be32(priv->reg + TALITOS_DEUISR),
386 in_be32(priv->reg + TALITOS_DEUISR_LO));
387 break;
388 case DESC_HDR_SEL0_MDEUA:
389 case DESC_HDR_SEL0_MDEUB:
390 dev_err(dev, "MDEUISR 0x%08x_%08x\n",
391 in_be32(priv->reg + TALITOS_MDEUISR),
392 in_be32(priv->reg + TALITOS_MDEUISR_LO));
393 break;
394 case DESC_HDR_SEL0_RNG:
395 dev_err(dev, "RNGUISR 0x%08x_%08x\n",
396 in_be32(priv->reg + TALITOS_RNGUISR),
397 in_be32(priv->reg + TALITOS_RNGUISR_LO));
398 break;
399 case DESC_HDR_SEL0_PKEU:
400 dev_err(dev, "PKEUISR 0x%08x_%08x\n",
401 in_be32(priv->reg + TALITOS_PKEUISR),
402 in_be32(priv->reg + TALITOS_PKEUISR_LO));
403 break;
404 case DESC_HDR_SEL0_AESU:
405 dev_err(dev, "AESUISR 0x%08x_%08x\n",
406 in_be32(priv->reg + TALITOS_AESUISR),
407 in_be32(priv->reg + TALITOS_AESUISR_LO));
408 break;
409 case DESC_HDR_SEL0_CRCU:
410 dev_err(dev, "CRCUISR 0x%08x_%08x\n",
411 in_be32(priv->reg + TALITOS_CRCUISR),
412 in_be32(priv->reg + TALITOS_CRCUISR_LO));
413 break;
414 case DESC_HDR_SEL0_KEU:
415 dev_err(dev, "KEUISR 0x%08x_%08x\n",
416 in_be32(priv->reg + TALITOS_KEUISR),
417 in_be32(priv->reg + TALITOS_KEUISR_LO));
418 break;
419 }
420
421 switch (desc_hdr & DESC_HDR_SEL1_MASK) {
422 case DESC_HDR_SEL1_MDEUA:
423 case DESC_HDR_SEL1_MDEUB:
424 dev_err(dev, "MDEUISR 0x%08x_%08x\n",
425 in_be32(priv->reg + TALITOS_MDEUISR),
426 in_be32(priv->reg + TALITOS_MDEUISR_LO));
427 break;
428 case DESC_HDR_SEL1_CRCU:
429 dev_err(dev, "CRCUISR 0x%08x_%08x\n",
430 in_be32(priv->reg + TALITOS_CRCUISR),
431 in_be32(priv->reg + TALITOS_CRCUISR_LO));
432 break;
433 }
434
435 for (i = 0; i < 8; i++)
436 dev_err(dev, "DESCBUF 0x%08x_%08x\n",
437 in_be32(priv->chan[ch].reg + TALITOS_DESCBUF + 8*i),
438 in_be32(priv->chan[ch].reg + TALITOS_DESCBUF_LO + 8*i));
439 }
440
441 /*
442 * recover from error interrupts
443 */
444 static void talitos_error(struct device *dev, u32 isr, u32 isr_lo)
445 {
446 struct talitos_private *priv = dev_get_drvdata(dev);
447 unsigned int timeout = TALITOS_TIMEOUT;
448 int ch, error, reset_dev = 0, reset_ch = 0;
449 u32 v, v_lo;
450
451 for (ch = 0; ch < priv->num_channels; ch++) {
452 /* skip channels without errors */
453 if (!(isr & (1 << (ch * 2 + 1))))
454 continue;
455
456 error = -EINVAL;
457
458 v = in_be32(priv->chan[ch].reg + TALITOS_CCPSR);
459 v_lo = in_be32(priv->chan[ch].reg + TALITOS_CCPSR_LO);
460
461 if (v_lo & TALITOS_CCPSR_LO_DOF) {
462 dev_err(dev, "double fetch fifo overflow error\n");
463 error = -EAGAIN;
464 reset_ch = 1;
465 }
466 if (v_lo & TALITOS_CCPSR_LO_SOF) {
467 /* h/w dropped descriptor */
468 dev_err(dev, "single fetch fifo overflow error\n");
469 error = -EAGAIN;
470 }
471 if (v_lo & TALITOS_CCPSR_LO_MDTE)
472 dev_err(dev, "master data transfer error\n");
473 if (v_lo & TALITOS_CCPSR_LO_SGDLZ)
474 dev_err(dev, "s/g data length zero error\n");
475 if (v_lo & TALITOS_CCPSR_LO_FPZ)
476 dev_err(dev, "fetch pointer zero error\n");
477 if (v_lo & TALITOS_CCPSR_LO_IDH)
478 dev_err(dev, "illegal descriptor header error\n");
479 if (v_lo & TALITOS_CCPSR_LO_IEU)
480 dev_err(dev, "invalid execution unit error\n");
481 if (v_lo & TALITOS_CCPSR_LO_EU)
482 report_eu_error(dev, ch, current_desc_hdr(dev, ch));
483 if (v_lo & TALITOS_CCPSR_LO_GB)
484 dev_err(dev, "gather boundary error\n");
485 if (v_lo & TALITOS_CCPSR_LO_GRL)
486 dev_err(dev, "gather return/length error\n");
487 if (v_lo & TALITOS_CCPSR_LO_SB)
488 dev_err(dev, "scatter boundary error\n");
489 if (v_lo & TALITOS_CCPSR_LO_SRL)
490 dev_err(dev, "scatter return/length error\n");
491
492 flush_channel(dev, ch, error, reset_ch);
493
494 if (reset_ch) {
495 reset_channel(dev, ch);
496 } else {
497 setbits32(priv->chan[ch].reg + TALITOS_CCCR,
498 TALITOS_CCCR_CONT);
499 setbits32(priv->chan[ch].reg + TALITOS_CCCR_LO, 0);
500 while ((in_be32(priv->chan[ch].reg + TALITOS_CCCR) &
501 TALITOS_CCCR_CONT) && --timeout)
502 cpu_relax();
503 if (timeout == 0) {
504 dev_err(dev, "failed to restart channel %d\n",
505 ch);
506 reset_dev = 1;
507 }
508 }
509 }
510 if (reset_dev || isr & ~TALITOS_ISR_4CHERR || isr_lo) {
511 dev_err(dev, "done overflow, internal time out, or rngu error: "
512 "ISR 0x%08x_%08x\n", isr, isr_lo);
513
514 /* purge request queues */
515 for (ch = 0; ch < priv->num_channels; ch++)
516 flush_channel(dev, ch, -EIO, 1);
517
518 /* reset and reinitialize the device */
519 init_device(dev);
520 }
521 }
522
523 #define DEF_TALITOS_INTERRUPT(name, ch_done_mask, ch_err_mask, tlet) \
524 static irqreturn_t talitos_interrupt_##name(int irq, void *data) \
525 { \
526 struct device *dev = data; \
527 struct talitos_private *priv = dev_get_drvdata(dev); \
528 u32 isr, isr_lo; \
529 unsigned long flags; \
530 \
531 spin_lock_irqsave(&priv->reg_lock, flags); \
532 isr = in_be32(priv->reg + TALITOS_ISR); \
533 isr_lo = in_be32(priv->reg + TALITOS_ISR_LO); \
534 /* Acknowledge interrupt */ \
535 out_be32(priv->reg + TALITOS_ICR, isr & (ch_done_mask | ch_err_mask)); \
536 out_be32(priv->reg + TALITOS_ICR_LO, isr_lo); \
537 \
538 if (unlikely(isr & ch_err_mask || isr_lo)) { \
539 spin_unlock_irqrestore(&priv->reg_lock, flags); \
540 talitos_error(dev, isr & ch_err_mask, isr_lo); \
541 } \
542 else { \
543 if (likely(isr & ch_done_mask)) { \
544 /* mask further done interrupts. */ \
545 clrbits32(priv->reg + TALITOS_IMR, ch_done_mask); \
546 /* done_task will unmask done interrupts at exit */ \
547 tasklet_schedule(&priv->done_task[tlet]); \
548 } \
549 spin_unlock_irqrestore(&priv->reg_lock, flags); \
550 } \
551 \
552 return (isr & (ch_done_mask | ch_err_mask) || isr_lo) ? IRQ_HANDLED : \
553 IRQ_NONE; \
554 }
555 DEF_TALITOS_INTERRUPT(4ch, TALITOS_ISR_4CHDONE, TALITOS_ISR_4CHERR, 0)
556 DEF_TALITOS_INTERRUPT(ch0_2, TALITOS_ISR_CH_0_2_DONE, TALITOS_ISR_CH_0_2_ERR, 0)
557 DEF_TALITOS_INTERRUPT(ch1_3, TALITOS_ISR_CH_1_3_DONE, TALITOS_ISR_CH_1_3_ERR, 1)
558
559 /*
560 * hwrng
561 */
562 static int talitos_rng_data_present(struct hwrng *rng, int wait)
563 {
564 struct device *dev = (struct device *)rng->priv;
565 struct talitos_private *priv = dev_get_drvdata(dev);
566 u32 ofl;
567 int i;
568
569 for (i = 0; i < 20; i++) {
570 ofl = in_be32(priv->reg + TALITOS_RNGUSR_LO) &
571 TALITOS_RNGUSR_LO_OFL;
572 if (ofl || !wait)
573 break;
574 udelay(10);
575 }
576
577 return !!ofl;
578 }
579
580 static int talitos_rng_data_read(struct hwrng *rng, u32 *data)
581 {
582 struct device *dev = (struct device *)rng->priv;
583 struct talitos_private *priv = dev_get_drvdata(dev);
584
585 /* rng fifo requires 64-bit accesses */
586 *data = in_be32(priv->reg + TALITOS_RNGU_FIFO);
587 *data = in_be32(priv->reg + TALITOS_RNGU_FIFO_LO);
588
589 return sizeof(u32);
590 }
591
592 static int talitos_rng_init(struct hwrng *rng)
593 {
594 struct device *dev = (struct device *)rng->priv;
595 struct talitos_private *priv = dev_get_drvdata(dev);
596 unsigned int timeout = TALITOS_TIMEOUT;
597
598 setbits32(priv->reg + TALITOS_RNGURCR_LO, TALITOS_RNGURCR_LO_SR);
599 while (!(in_be32(priv->reg + TALITOS_RNGUSR_LO) & TALITOS_RNGUSR_LO_RD)
600 && --timeout)
601 cpu_relax();
602 if (timeout == 0) {
603 dev_err(dev, "failed to reset rng hw\n");
604 return -ENODEV;
605 }
606
607 /* start generating */
608 setbits32(priv->reg + TALITOS_RNGUDSR_LO, 0);
609
610 return 0;
611 }
612
613 static int talitos_register_rng(struct device *dev)
614 {
615 struct talitos_private *priv = dev_get_drvdata(dev);
616
617 priv->rng.name = dev_driver_string(dev),
618 priv->rng.init = talitos_rng_init,
619 priv->rng.data_present = talitos_rng_data_present,
620 priv->rng.data_read = talitos_rng_data_read,
621 priv->rng.priv = (unsigned long)dev;
622
623 return hwrng_register(&priv->rng);
624 }
625
626 static void talitos_unregister_rng(struct device *dev)
627 {
628 struct talitos_private *priv = dev_get_drvdata(dev);
629
630 hwrng_unregister(&priv->rng);
631 }
632
633 /*
634 * crypto alg
635 */
636 #define TALITOS_CRA_PRIORITY 3000
637 #define TALITOS_MAX_KEY_SIZE 96
638 #define TALITOS_MAX_IV_LENGTH 16 /* max of AES_BLOCK_SIZE, DES3_EDE_BLOCK_SIZE */
639
640 #define MD5_BLOCK_SIZE 64
641
642 struct talitos_ctx {
643 struct device *dev;
644 int ch;
645 __be32 desc_hdr_template;
646 u8 key[TALITOS_MAX_KEY_SIZE];
647 u8 iv[TALITOS_MAX_IV_LENGTH];
648 unsigned int keylen;
649 unsigned int enckeylen;
650 unsigned int authkeylen;
651 unsigned int authsize;
652 };
653
654 #define HASH_MAX_BLOCK_SIZE SHA512_BLOCK_SIZE
655 #define TALITOS_MDEU_MAX_CONTEXT_SIZE TALITOS_MDEU_CONTEXT_SIZE_SHA384_SHA512
656
657 struct talitos_ahash_req_ctx {
658 u32 hw_context[TALITOS_MDEU_MAX_CONTEXT_SIZE / sizeof(u32)];
659 unsigned int hw_context_size;
660 u8 buf[HASH_MAX_BLOCK_SIZE];
661 u8 bufnext[HASH_MAX_BLOCK_SIZE];
662 unsigned int swinit;
663 unsigned int first;
664 unsigned int last;
665 unsigned int to_hash_later;
666 u64 nbuf;
667 struct scatterlist bufsl[2];
668 struct scatterlist *psrc;
669 };
670
671 static int aead_setauthsize(struct crypto_aead *authenc,
672 unsigned int authsize)
673 {
674 struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
675
676 ctx->authsize = authsize;
677
678 return 0;
679 }
680
681 static int aead_setkey(struct crypto_aead *authenc,
682 const u8 *key, unsigned int keylen)
683 {
684 struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
685 struct crypto_authenc_keys keys;
686
687 if (crypto_authenc_extractkeys(&keys, key, keylen) != 0)
688 goto badkey;
689
690 if (keys.authkeylen + keys.enckeylen > TALITOS_MAX_KEY_SIZE)
691 goto badkey;
692
693 memcpy(ctx->key, keys.authkey, keys.authkeylen);
694 memcpy(&ctx->key[keys.authkeylen], keys.enckey, keys.enckeylen);
695
696 ctx->keylen = keys.authkeylen + keys.enckeylen;
697 ctx->enckeylen = keys.enckeylen;
698 ctx->authkeylen = keys.authkeylen;
699
700 return 0;
701
702 badkey:
703 crypto_aead_set_flags(authenc, CRYPTO_TFM_RES_BAD_KEY_LEN);
704 return -EINVAL;
705 }
706
707 /*
708 * talitos_edesc - s/w-extended descriptor
709 * @assoc_nents: number of segments in associated data scatterlist
710 * @src_nents: number of segments in input scatterlist
711 * @dst_nents: number of segments in output scatterlist
712 * @assoc_chained: whether assoc is chained or not
713 * @src_chained: whether src is chained or not
714 * @dst_chained: whether dst is chained or not
715 * @iv_dma: dma address of iv for checking continuity and link table
716 * @dma_len: length of dma mapped link_tbl space
717 * @dma_link_tbl: bus physical address of link_tbl
718 * @desc: h/w descriptor
719 * @link_tbl: input and output h/w link tables (if {src,dst}_nents > 1)
720 *
721 * if decrypting (with authcheck), or either one of src_nents or dst_nents
722 * is greater than 1, an integrity check value is concatenated to the end
723 * of link_tbl data
724 */
725 struct talitos_edesc {
726 int assoc_nents;
727 int src_nents;
728 int dst_nents;
729 bool assoc_chained;
730 bool src_chained;
731 bool dst_chained;
732 dma_addr_t iv_dma;
733 int dma_len;
734 dma_addr_t dma_link_tbl;
735 struct talitos_desc desc;
736 struct talitos_ptr link_tbl[0];
737 };
738
739 static int talitos_map_sg(struct device *dev, struct scatterlist *sg,
740 unsigned int nents, enum dma_data_direction dir,
741 bool chained)
742 {
743 if (unlikely(chained))
744 while (sg) {
745 dma_map_sg(dev, sg, 1, dir);
746 sg = sg_next(sg);
747 }
748 else
749 dma_map_sg(dev, sg, nents, dir);
750 return nents;
751 }
752
753 static void talitos_unmap_sg_chain(struct device *dev, struct scatterlist *sg,
754 enum dma_data_direction dir)
755 {
756 while (sg) {
757 dma_unmap_sg(dev, sg, 1, dir);
758 sg = sg_next(sg);
759 }
760 }
761
762 static void talitos_sg_unmap(struct device *dev,
763 struct talitos_edesc *edesc,
764 struct scatterlist *src,
765 struct scatterlist *dst)
766 {
767 unsigned int src_nents = edesc->src_nents ? : 1;
768 unsigned int dst_nents = edesc->dst_nents ? : 1;
769
770 if (src != dst) {
771 if (edesc->src_chained)
772 talitos_unmap_sg_chain(dev, src, DMA_TO_DEVICE);
773 else
774 dma_unmap_sg(dev, src, src_nents, DMA_TO_DEVICE);
775
776 if (dst) {
777 if (edesc->dst_chained)
778 talitos_unmap_sg_chain(dev, dst,
779 DMA_FROM_DEVICE);
780 else
781 dma_unmap_sg(dev, dst, dst_nents,
782 DMA_FROM_DEVICE);
783 }
784 } else
785 if (edesc->src_chained)
786 talitos_unmap_sg_chain(dev, src, DMA_BIDIRECTIONAL);
787 else
788 dma_unmap_sg(dev, src, src_nents, DMA_BIDIRECTIONAL);
789 }
790
791 static void ipsec_esp_unmap(struct device *dev,
792 struct talitos_edesc *edesc,
793 struct aead_request *areq)
794 {
795 unmap_single_talitos_ptr(dev, &edesc->desc.ptr[6], DMA_FROM_DEVICE);
796 unmap_single_talitos_ptr(dev, &edesc->desc.ptr[3], DMA_TO_DEVICE);
797 unmap_single_talitos_ptr(dev, &edesc->desc.ptr[2], DMA_TO_DEVICE);
798 unmap_single_talitos_ptr(dev, &edesc->desc.ptr[0], DMA_TO_DEVICE);
799
800 if (edesc->assoc_chained)
801 talitos_unmap_sg_chain(dev, areq->assoc, DMA_TO_DEVICE);
802 else if (areq->assoclen)
803 /* assoc_nents counts also for IV in non-contiguous cases */
804 dma_unmap_sg(dev, areq->assoc,
805 edesc->assoc_nents ? edesc->assoc_nents - 1 : 1,
806 DMA_TO_DEVICE);
807
808 talitos_sg_unmap(dev, edesc, areq->src, areq->dst);
809
810 if (edesc->dma_len)
811 dma_unmap_single(dev, edesc->dma_link_tbl, edesc->dma_len,
812 DMA_BIDIRECTIONAL);
813 }
814
815 /*
816 * ipsec_esp descriptor callbacks
817 */
818 static void ipsec_esp_encrypt_done(struct device *dev,
819 struct talitos_desc *desc, void *context,
820 int err)
821 {
822 struct aead_request *areq = context;
823 struct crypto_aead *authenc = crypto_aead_reqtfm(areq);
824 struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
825 struct talitos_edesc *edesc;
826 struct scatterlist *sg;
827 void *icvdata;
828
829 edesc = container_of(desc, struct talitos_edesc, desc);
830
831 ipsec_esp_unmap(dev, edesc, areq);
832
833 /* copy the generated ICV to dst */
834 if (edesc->dst_nents) {
835 icvdata = &edesc->link_tbl[edesc->src_nents +
836 edesc->dst_nents + 2 +
837 edesc->assoc_nents];
838 sg = sg_last(areq->dst, edesc->dst_nents);
839 memcpy((char *)sg_virt(sg) + sg->length - ctx->authsize,
840 icvdata, ctx->authsize);
841 }
842
843 kfree(edesc);
844
845 aead_request_complete(areq, err);
846 }
847
848 static void ipsec_esp_decrypt_swauth_done(struct device *dev,
849 struct talitos_desc *desc,
850 void *context, int err)
851 {
852 struct aead_request *req = context;
853 struct crypto_aead *authenc = crypto_aead_reqtfm(req);
854 struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
855 struct talitos_edesc *edesc;
856 struct scatterlist *sg;
857 void *icvdata;
858
859 edesc = container_of(desc, struct talitos_edesc, desc);
860
861 ipsec_esp_unmap(dev, edesc, req);
862
863 if (!err) {
864 /* auth check */
865 if (edesc->dma_len)
866 icvdata = &edesc->link_tbl[edesc->src_nents +
867 edesc->dst_nents + 2 +
868 edesc->assoc_nents];
869 else
870 icvdata = &edesc->link_tbl[0];
871
872 sg = sg_last(req->dst, edesc->dst_nents ? : 1);
873 err = memcmp(icvdata, (char *)sg_virt(sg) + sg->length -
874 ctx->authsize, ctx->authsize) ? -EBADMSG : 0;
875 }
876
877 kfree(edesc);
878
879 aead_request_complete(req, err);
880 }
881
882 static void ipsec_esp_decrypt_hwauth_done(struct device *dev,
883 struct talitos_desc *desc,
884 void *context, int err)
885 {
886 struct aead_request *req = context;
887 struct talitos_edesc *edesc;
888
889 edesc = container_of(desc, struct talitos_edesc, desc);
890
891 ipsec_esp_unmap(dev, edesc, req);
892
893 /* check ICV auth status */
894 if (!err && ((desc->hdr_lo & DESC_HDR_LO_ICCR1_MASK) !=
895 DESC_HDR_LO_ICCR1_PASS))
896 err = -EBADMSG;
897
898 kfree(edesc);
899
900 aead_request_complete(req, err);
901 }
902
903 /*
904 * convert scatterlist to SEC h/w link table format
905 * stop at cryptlen bytes
906 */
907 static int sg_to_link_tbl(struct scatterlist *sg, int sg_count,
908 int cryptlen, struct talitos_ptr *link_tbl_ptr)
909 {
910 int n_sg = sg_count;
911
912 while (n_sg--) {
913 to_talitos_ptr(link_tbl_ptr, sg_dma_address(sg));
914 link_tbl_ptr->len = cpu_to_be16(sg_dma_len(sg));
915 link_tbl_ptr->j_extent = 0;
916 link_tbl_ptr++;
917 cryptlen -= sg_dma_len(sg);
918 sg = sg_next(sg);
919 }
920
921 /* adjust (decrease) last one (or two) entry's len to cryptlen */
922 link_tbl_ptr--;
923 while (be16_to_cpu(link_tbl_ptr->len) <= (-cryptlen)) {
924 /* Empty this entry, and move to previous one */
925 cryptlen += be16_to_cpu(link_tbl_ptr->len);
926 link_tbl_ptr->len = 0;
927 sg_count--;
928 link_tbl_ptr--;
929 }
930 be16_add_cpu(&link_tbl_ptr->len, cryptlen);
931
932 /* tag end of link table */
933 link_tbl_ptr->j_extent = DESC_PTR_LNKTBL_RETURN;
934
935 return sg_count;
936 }
937
938 /*
939 * fill in and submit ipsec_esp descriptor
940 */
941 static int ipsec_esp(struct talitos_edesc *edesc, struct aead_request *areq,
942 u64 seq, void (*callback) (struct device *dev,
943 struct talitos_desc *desc,
944 void *context, int error))
945 {
946 struct crypto_aead *aead = crypto_aead_reqtfm(areq);
947 struct talitos_ctx *ctx = crypto_aead_ctx(aead);
948 struct device *dev = ctx->dev;
949 struct talitos_desc *desc = &edesc->desc;
950 unsigned int cryptlen = areq->cryptlen;
951 unsigned int authsize = ctx->authsize;
952 unsigned int ivsize = crypto_aead_ivsize(aead);
953 int sg_count, ret;
954 int sg_link_tbl_len;
955
956 /* hmac key */
957 map_single_talitos_ptr(dev, &desc->ptr[0], ctx->authkeylen, &ctx->key,
958 0, DMA_TO_DEVICE);
959
960 /* hmac data */
961 desc->ptr[1].len = cpu_to_be16(areq->assoclen + ivsize);
962 if (edesc->assoc_nents) {
963 int tbl_off = edesc->src_nents + edesc->dst_nents + 2;
964 struct talitos_ptr *tbl_ptr = &edesc->link_tbl[tbl_off];
965
966 to_talitos_ptr(&desc->ptr[1], edesc->dma_link_tbl + tbl_off *
967 sizeof(struct talitos_ptr));
968 desc->ptr[1].j_extent = DESC_PTR_LNKTBL_JUMP;
969
970 /* assoc_nents - 1 entries for assoc, 1 for IV */
971 sg_count = sg_to_link_tbl(areq->assoc, edesc->assoc_nents - 1,
972 areq->assoclen, tbl_ptr);
973
974 /* add IV to link table */
975 tbl_ptr += sg_count - 1;
976 tbl_ptr->j_extent = 0;
977 tbl_ptr++;
978 to_talitos_ptr(tbl_ptr, edesc->iv_dma);
979 tbl_ptr->len = cpu_to_be16(ivsize);
980 tbl_ptr->j_extent = DESC_PTR_LNKTBL_RETURN;
981
982 dma_sync_single_for_device(dev, edesc->dma_link_tbl,
983 edesc->dma_len, DMA_BIDIRECTIONAL);
984 } else {
985 if (areq->assoclen)
986 to_talitos_ptr(&desc->ptr[1],
987 sg_dma_address(areq->assoc));
988 else
989 to_talitos_ptr(&desc->ptr[1], edesc->iv_dma);
990 desc->ptr[1].j_extent = 0;
991 }
992
993 /* cipher iv */
994 to_talitos_ptr(&desc->ptr[2], edesc->iv_dma);
995 desc->ptr[2].len = cpu_to_be16(ivsize);
996 desc->ptr[2].j_extent = 0;
997 /* Sync needed for the aead_givencrypt case */
998 dma_sync_single_for_device(dev, edesc->iv_dma, ivsize, DMA_TO_DEVICE);
999
1000 /* cipher key */
1001 map_single_talitos_ptr(dev, &desc->ptr[3], ctx->enckeylen,
1002 (char *)&ctx->key + ctx->authkeylen, 0,
1003 DMA_TO_DEVICE);
1004
1005 /*
1006 * cipher in
1007 * map and adjust cipher len to aead request cryptlen.
1008 * extent is bytes of HMAC postpended to ciphertext,
1009 * typically 12 for ipsec
1010 */
1011 desc->ptr[4].len = cpu_to_be16(cryptlen);
1012 desc->ptr[4].j_extent = authsize;
1013
1014 sg_count = talitos_map_sg(dev, areq->src, edesc->src_nents ? : 1,
1015 (areq->src == areq->dst) ? DMA_BIDIRECTIONAL
1016 : DMA_TO_DEVICE,
1017 edesc->src_chained);
1018
1019 if (sg_count == 1) {
1020 to_talitos_ptr(&desc->ptr[4], sg_dma_address(areq->src));
1021 } else {
1022 sg_link_tbl_len = cryptlen;
1023
1024 if (edesc->desc.hdr & DESC_HDR_MODE1_MDEU_CICV)
1025 sg_link_tbl_len = cryptlen + authsize;
1026
1027 sg_count = sg_to_link_tbl(areq->src, sg_count, sg_link_tbl_len,
1028 &edesc->link_tbl[0]);
1029 if (sg_count > 1) {
1030 desc->ptr[4].j_extent |= DESC_PTR_LNKTBL_JUMP;
1031 to_talitos_ptr(&desc->ptr[4], edesc->dma_link_tbl);
1032 dma_sync_single_for_device(dev, edesc->dma_link_tbl,
1033 edesc->dma_len,
1034 DMA_BIDIRECTIONAL);
1035 } else {
1036 /* Only one segment now, so no link tbl needed */
1037 to_talitos_ptr(&desc->ptr[4],
1038 sg_dma_address(areq->src));
1039 }
1040 }
1041
1042 /* cipher out */
1043 desc->ptr[5].len = cpu_to_be16(cryptlen);
1044 desc->ptr[5].j_extent = authsize;
1045
1046 if (areq->src != areq->dst)
1047 sg_count = talitos_map_sg(dev, areq->dst,
1048 edesc->dst_nents ? : 1,
1049 DMA_FROM_DEVICE, edesc->dst_chained);
1050
1051 if (sg_count == 1) {
1052 to_talitos_ptr(&desc->ptr[5], sg_dma_address(areq->dst));
1053 } else {
1054 int tbl_off = edesc->src_nents + 1;
1055 struct talitos_ptr *tbl_ptr = &edesc->link_tbl[tbl_off];
1056
1057 to_talitos_ptr(&desc->ptr[5], edesc->dma_link_tbl +
1058 tbl_off * sizeof(struct talitos_ptr));
1059 sg_count = sg_to_link_tbl(areq->dst, sg_count, cryptlen,
1060 tbl_ptr);
1061
1062 /* Add an entry to the link table for ICV data */
1063 tbl_ptr += sg_count - 1;
1064 tbl_ptr->j_extent = 0;
1065 tbl_ptr++;
1066 tbl_ptr->j_extent = DESC_PTR_LNKTBL_RETURN;
1067 tbl_ptr->len = cpu_to_be16(authsize);
1068
1069 /* icv data follows link tables */
1070 to_talitos_ptr(tbl_ptr, edesc->dma_link_tbl +
1071 (tbl_off + edesc->dst_nents + 1 +
1072 edesc->assoc_nents) *
1073 sizeof(struct talitos_ptr));
1074 desc->ptr[5].j_extent |= DESC_PTR_LNKTBL_JUMP;
1075 dma_sync_single_for_device(ctx->dev, edesc->dma_link_tbl,
1076 edesc->dma_len, DMA_BIDIRECTIONAL);
1077 }
1078
1079 /* iv out */
1080 map_single_talitos_ptr(dev, &desc->ptr[6], ivsize, ctx->iv, 0,
1081 DMA_FROM_DEVICE);
1082
1083 ret = talitos_submit(dev, ctx->ch, desc, callback, areq);
1084 if (ret != -EINPROGRESS) {
1085 ipsec_esp_unmap(dev, edesc, areq);
1086 kfree(edesc);
1087 }
1088 return ret;
1089 }
1090
1091 /*
1092 * derive number of elements in scatterlist
1093 */
1094 static int sg_count(struct scatterlist *sg_list, int nbytes, bool *chained)
1095 {
1096 struct scatterlist *sg = sg_list;
1097 int sg_nents = 0;
1098
1099 *chained = false;
1100 while (nbytes > 0) {
1101 sg_nents++;
1102 nbytes -= sg->length;
1103 if (!sg_is_last(sg) && (sg + 1)->length == 0)
1104 *chained = true;
1105 sg = sg_next(sg);
1106 }
1107
1108 return sg_nents;
1109 }
1110
1111 /*
1112 * allocate and map the extended descriptor
1113 */
1114 static struct talitos_edesc *talitos_edesc_alloc(struct device *dev,
1115 struct scatterlist *assoc,
1116 struct scatterlist *src,
1117 struct scatterlist *dst,
1118 u8 *iv,
1119 unsigned int assoclen,
1120 unsigned int cryptlen,
1121 unsigned int authsize,
1122 unsigned int ivsize,
1123 int icv_stashing,
1124 u32 cryptoflags,
1125 bool encrypt)
1126 {
1127 struct talitos_edesc *edesc;
1128 int assoc_nents = 0, src_nents, dst_nents, alloc_len, dma_len;
1129 bool assoc_chained = false, src_chained = false, dst_chained = false;
1130 dma_addr_t iv_dma = 0;
1131 gfp_t flags = cryptoflags & CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL :
1132 GFP_ATOMIC;
1133
1134 if (cryptlen + authsize > TALITOS_MAX_DATA_LEN) {
1135 dev_err(dev, "length exceeds h/w max limit\n");
1136 return ERR_PTR(-EINVAL);
1137 }
1138
1139 if (ivsize)
1140 iv_dma = dma_map_single(dev, iv, ivsize, DMA_TO_DEVICE);
1141
1142 if (assoclen) {
1143 /*
1144 * Currently it is assumed that iv is provided whenever assoc
1145 * is.
1146 */
1147 BUG_ON(!iv);
1148
1149 assoc_nents = sg_count(assoc, assoclen, &assoc_chained);
1150 talitos_map_sg(dev, assoc, assoc_nents, DMA_TO_DEVICE,
1151 assoc_chained);
1152 assoc_nents = (assoc_nents == 1) ? 0 : assoc_nents;
1153
1154 if (assoc_nents || sg_dma_address(assoc) + assoclen != iv_dma)
1155 assoc_nents = assoc_nents ? assoc_nents + 1 : 2;
1156 }
1157
1158 if (!dst || dst == src) {
1159 src_nents = sg_count(src, cryptlen + authsize, &src_chained);
1160 src_nents = (src_nents == 1) ? 0 : src_nents;
1161 dst_nents = dst ? src_nents : 0;
1162 } else { /* dst && dst != src*/
1163 src_nents = sg_count(src, cryptlen + (encrypt ? 0 : authsize),
1164 &src_chained);
1165 src_nents = (src_nents == 1) ? 0 : src_nents;
1166 dst_nents = sg_count(dst, cryptlen + (encrypt ? authsize : 0),
1167 &dst_chained);
1168 dst_nents = (dst_nents == 1) ? 0 : dst_nents;
1169 }
1170
1171 /*
1172 * allocate space for base edesc plus the link tables,
1173 * allowing for two separate entries for ICV and generated ICV (+ 2),
1174 * and the ICV data itself
1175 */
1176 alloc_len = sizeof(struct talitos_edesc);
1177 if (assoc_nents || src_nents || dst_nents) {
1178 dma_len = (src_nents + dst_nents + 2 + assoc_nents) *
1179 sizeof(struct talitos_ptr) + authsize;
1180 alloc_len += dma_len;
1181 } else {
1182 dma_len = 0;
1183 alloc_len += icv_stashing ? authsize : 0;
1184 }
1185
1186 edesc = kmalloc(alloc_len, GFP_DMA | flags);
1187 if (!edesc) {
1188 if (assoc_chained)
1189 talitos_unmap_sg_chain(dev, assoc, DMA_TO_DEVICE);
1190 else if (assoclen)
1191 dma_unmap_sg(dev, assoc,
1192 assoc_nents ? assoc_nents - 1 : 1,
1193 DMA_TO_DEVICE);
1194
1195 if (iv_dma)
1196 dma_unmap_single(dev, iv_dma, ivsize, DMA_TO_DEVICE);
1197
1198 dev_err(dev, "could not allocate edescriptor\n");
1199 return ERR_PTR(-ENOMEM);
1200 }
1201
1202 edesc->assoc_nents = assoc_nents;
1203 edesc->src_nents = src_nents;
1204 edesc->dst_nents = dst_nents;
1205 edesc->assoc_chained = assoc_chained;
1206 edesc->src_chained = src_chained;
1207 edesc->dst_chained = dst_chained;
1208 edesc->iv_dma = iv_dma;
1209 edesc->dma_len = dma_len;
1210 if (dma_len)
1211 edesc->dma_link_tbl = dma_map_single(dev, &edesc->link_tbl[0],
1212 edesc->dma_len,
1213 DMA_BIDIRECTIONAL);
1214
1215 return edesc;
1216 }
1217
1218 static struct talitos_edesc *aead_edesc_alloc(struct aead_request *areq, u8 *iv,
1219 int icv_stashing, bool encrypt)
1220 {
1221 struct crypto_aead *authenc = crypto_aead_reqtfm(areq);
1222 struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
1223 unsigned int ivsize = crypto_aead_ivsize(authenc);
1224
1225 return talitos_edesc_alloc(ctx->dev, areq->assoc, areq->src, areq->dst,
1226 iv, areq->assoclen, areq->cryptlen,
1227 ctx->authsize, ivsize, icv_stashing,
1228 areq->base.flags, encrypt);
1229 }
1230
1231 static int aead_encrypt(struct aead_request *req)
1232 {
1233 struct crypto_aead *authenc = crypto_aead_reqtfm(req);
1234 struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
1235 struct talitos_edesc *edesc;
1236
1237 /* allocate extended descriptor */
1238 edesc = aead_edesc_alloc(req, req->iv, 0, true);
1239 if (IS_ERR(edesc))
1240 return PTR_ERR(edesc);
1241
1242 /* set encrypt */
1243 edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT;
1244
1245 return ipsec_esp(edesc, req, 0, ipsec_esp_encrypt_done);
1246 }
1247
1248 static int aead_decrypt(struct aead_request *req)
1249 {
1250 struct crypto_aead *authenc = crypto_aead_reqtfm(req);
1251 struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
1252 unsigned int authsize = ctx->authsize;
1253 struct talitos_private *priv = dev_get_drvdata(ctx->dev);
1254 struct talitos_edesc *edesc;
1255 struct scatterlist *sg;
1256 void *icvdata;
1257
1258 req->cryptlen -= authsize;
1259
1260 /* allocate extended descriptor */
1261 edesc = aead_edesc_alloc(req, req->iv, 1, false);
1262 if (IS_ERR(edesc))
1263 return PTR_ERR(edesc);
1264
1265 if ((priv->features & TALITOS_FTR_HW_AUTH_CHECK) &&
1266 ((!edesc->src_nents && !edesc->dst_nents) ||
1267 priv->features & TALITOS_FTR_SRC_LINK_TBL_LEN_INCLUDES_EXTENT)) {
1268
1269 /* decrypt and check the ICV */
1270 edesc->desc.hdr = ctx->desc_hdr_template |
1271 DESC_HDR_DIR_INBOUND |
1272 DESC_HDR_MODE1_MDEU_CICV;
1273
1274 /* reset integrity check result bits */
1275 edesc->desc.hdr_lo = 0;
1276
1277 return ipsec_esp(edesc, req, 0, ipsec_esp_decrypt_hwauth_done);
1278 }
1279
1280 /* Have to check the ICV with software */
1281 edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_DIR_INBOUND;
1282
1283 /* stash incoming ICV for later cmp with ICV generated by the h/w */
1284 if (edesc->dma_len)
1285 icvdata = &edesc->link_tbl[edesc->src_nents +
1286 edesc->dst_nents + 2 +
1287 edesc->assoc_nents];
1288 else
1289 icvdata = &edesc->link_tbl[0];
1290
1291 sg = sg_last(req->src, edesc->src_nents ? : 1);
1292
1293 memcpy(icvdata, (char *)sg_virt(sg) + sg->length - ctx->authsize,
1294 ctx->authsize);
1295
1296 return ipsec_esp(edesc, req, 0, ipsec_esp_decrypt_swauth_done);
1297 }
1298
1299 static int aead_givencrypt(struct aead_givcrypt_request *req)
1300 {
1301 struct aead_request *areq = &req->areq;
1302 struct crypto_aead *authenc = crypto_aead_reqtfm(areq);
1303 struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
1304 struct talitos_edesc *edesc;
1305
1306 /* allocate extended descriptor */
1307 edesc = aead_edesc_alloc(areq, req->giv, 0, true);
1308 if (IS_ERR(edesc))
1309 return PTR_ERR(edesc);
1310
1311 /* set encrypt */
1312 edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT;
1313
1314 memcpy(req->giv, ctx->iv, crypto_aead_ivsize(authenc));
1315 /* avoid consecutive packets going out with same IV */
1316 *(__be64 *)req->giv ^= cpu_to_be64(req->seq);
1317
1318 return ipsec_esp(edesc, areq, req->seq, ipsec_esp_encrypt_done);
1319 }
1320
1321 static int ablkcipher_setkey(struct crypto_ablkcipher *cipher,
1322 const u8 *key, unsigned int keylen)
1323 {
1324 struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher);
1325
1326 memcpy(&ctx->key, key, keylen);
1327 ctx->keylen = keylen;
1328
1329 return 0;
1330 }
1331
1332 static void common_nonsnoop_unmap(struct device *dev,
1333 struct talitos_edesc *edesc,
1334 struct ablkcipher_request *areq)
1335 {
1336 unmap_single_talitos_ptr(dev, &edesc->desc.ptr[5], DMA_FROM_DEVICE);
1337 unmap_single_talitos_ptr(dev, &edesc->desc.ptr[2], DMA_TO_DEVICE);
1338 unmap_single_talitos_ptr(dev, &edesc->desc.ptr[1], DMA_TO_DEVICE);
1339
1340 talitos_sg_unmap(dev, edesc, areq->src, areq->dst);
1341
1342 if (edesc->dma_len)
1343 dma_unmap_single(dev, edesc->dma_link_tbl, edesc->dma_len,
1344 DMA_BIDIRECTIONAL);
1345 }
1346
1347 static void ablkcipher_done(struct device *dev,
1348 struct talitos_desc *desc, void *context,
1349 int err)
1350 {
1351 struct ablkcipher_request *areq = context;
1352 struct talitos_edesc *edesc;
1353
1354 edesc = container_of(desc, struct talitos_edesc, desc);
1355
1356 common_nonsnoop_unmap(dev, edesc, areq);
1357
1358 kfree(edesc);
1359
1360 areq->base.complete(&areq->base, err);
1361 }
1362
1363 static int common_nonsnoop(struct talitos_edesc *edesc,
1364 struct ablkcipher_request *areq,
1365 void (*callback) (struct device *dev,
1366 struct talitos_desc *desc,
1367 void *context, int error))
1368 {
1369 struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq);
1370 struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher);
1371 struct device *dev = ctx->dev;
1372 struct talitos_desc *desc = &edesc->desc;
1373 unsigned int cryptlen = areq->nbytes;
1374 unsigned int ivsize = crypto_ablkcipher_ivsize(cipher);
1375 int sg_count, ret;
1376
1377 /* first DWORD empty */
1378 desc->ptr[0].len = 0;
1379 to_talitos_ptr(&desc->ptr[0], 0);
1380 desc->ptr[0].j_extent = 0;
1381
1382 /* cipher iv */
1383 to_talitos_ptr(&desc->ptr[1], edesc->iv_dma);
1384 desc->ptr[1].len = cpu_to_be16(ivsize);
1385 desc->ptr[1].j_extent = 0;
1386
1387 /* cipher key */
1388 map_single_talitos_ptr(dev, &desc->ptr[2], ctx->keylen,
1389 (char *)&ctx->key, 0, DMA_TO_DEVICE);
1390
1391 /*
1392 * cipher in
1393 */
1394 desc->ptr[3].len = cpu_to_be16(cryptlen);
1395 desc->ptr[3].j_extent = 0;
1396
1397 sg_count = talitos_map_sg(dev, areq->src, edesc->src_nents ? : 1,
1398 (areq->src == areq->dst) ? DMA_BIDIRECTIONAL
1399 : DMA_TO_DEVICE,
1400 edesc->src_chained);
1401
1402 if (sg_count == 1) {
1403 to_talitos_ptr(&desc->ptr[3], sg_dma_address(areq->src));
1404 } else {
1405 sg_count = sg_to_link_tbl(areq->src, sg_count, cryptlen,
1406 &edesc->link_tbl[0]);
1407 if (sg_count > 1) {
1408 to_talitos_ptr(&desc->ptr[3], edesc->dma_link_tbl);
1409 desc->ptr[3].j_extent |= DESC_PTR_LNKTBL_JUMP;
1410 dma_sync_single_for_device(dev, edesc->dma_link_tbl,
1411 edesc->dma_len,
1412 DMA_BIDIRECTIONAL);
1413 } else {
1414 /* Only one segment now, so no link tbl needed */
1415 to_talitos_ptr(&desc->ptr[3],
1416 sg_dma_address(areq->src));
1417 }
1418 }
1419
1420 /* cipher out */
1421 desc->ptr[4].len = cpu_to_be16(cryptlen);
1422 desc->ptr[4].j_extent = 0;
1423
1424 if (areq->src != areq->dst)
1425 sg_count = talitos_map_sg(dev, areq->dst,
1426 edesc->dst_nents ? : 1,
1427 DMA_FROM_DEVICE, edesc->dst_chained);
1428
1429 if (sg_count == 1) {
1430 to_talitos_ptr(&desc->ptr[4], sg_dma_address(areq->dst));
1431 } else {
1432 struct talitos_ptr *link_tbl_ptr =
1433 &edesc->link_tbl[edesc->src_nents + 1];
1434
1435 to_talitos_ptr(&desc->ptr[4], edesc->dma_link_tbl +
1436 (edesc->src_nents + 1) *
1437 sizeof(struct talitos_ptr));
1438 desc->ptr[4].j_extent |= DESC_PTR_LNKTBL_JUMP;
1439 sg_count = sg_to_link_tbl(areq->dst, sg_count, cryptlen,
1440 link_tbl_ptr);
1441 dma_sync_single_for_device(ctx->dev, edesc->dma_link_tbl,
1442 edesc->dma_len, DMA_BIDIRECTIONAL);
1443 }
1444
1445 /* iv out */
1446 map_single_talitos_ptr(dev, &desc->ptr[5], ivsize, ctx->iv, 0,
1447 DMA_FROM_DEVICE);
1448
1449 /* last DWORD empty */
1450 desc->ptr[6].len = 0;
1451 to_talitos_ptr(&desc->ptr[6], 0);
1452 desc->ptr[6].j_extent = 0;
1453
1454 ret = talitos_submit(dev, ctx->ch, desc, callback, areq);
1455 if (ret != -EINPROGRESS) {
1456 common_nonsnoop_unmap(dev, edesc, areq);
1457 kfree(edesc);
1458 }
1459 return ret;
1460 }
1461
1462 static struct talitos_edesc *ablkcipher_edesc_alloc(struct ablkcipher_request *
1463 areq, bool encrypt)
1464 {
1465 struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq);
1466 struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher);
1467 unsigned int ivsize = crypto_ablkcipher_ivsize(cipher);
1468
1469 return talitos_edesc_alloc(ctx->dev, NULL, areq->src, areq->dst,
1470 areq->info, 0, areq->nbytes, 0, ivsize, 0,
1471 areq->base.flags, encrypt);
1472 }
1473
1474 static int ablkcipher_encrypt(struct ablkcipher_request *areq)
1475 {
1476 struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq);
1477 struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher);
1478 struct talitos_edesc *edesc;
1479
1480 /* allocate extended descriptor */
1481 edesc = ablkcipher_edesc_alloc(areq, true);
1482 if (IS_ERR(edesc))
1483 return PTR_ERR(edesc);
1484
1485 /* set encrypt */
1486 edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT;
1487
1488 return common_nonsnoop(edesc, areq, ablkcipher_done);
1489 }
1490
1491 static int ablkcipher_decrypt(struct ablkcipher_request *areq)
1492 {
1493 struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq);
1494 struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher);
1495 struct talitos_edesc *edesc;
1496
1497 /* allocate extended descriptor */
1498 edesc = ablkcipher_edesc_alloc(areq, false);
1499 if (IS_ERR(edesc))
1500 return PTR_ERR(edesc);
1501
1502 edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_DIR_INBOUND;
1503
1504 return common_nonsnoop(edesc, areq, ablkcipher_done);
1505 }
1506
1507 static void common_nonsnoop_hash_unmap(struct device *dev,
1508 struct talitos_edesc *edesc,
1509 struct ahash_request *areq)
1510 {
1511 struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1512
1513 unmap_single_talitos_ptr(dev, &edesc->desc.ptr[5], DMA_FROM_DEVICE);
1514
1515 /* When using hashctx-in, must unmap it. */
1516 if (edesc->desc.ptr[1].len)
1517 unmap_single_talitos_ptr(dev, &edesc->desc.ptr[1],
1518 DMA_TO_DEVICE);
1519
1520 if (edesc->desc.ptr[2].len)
1521 unmap_single_talitos_ptr(dev, &edesc->desc.ptr[2],
1522 DMA_TO_DEVICE);
1523
1524 talitos_sg_unmap(dev, edesc, req_ctx->psrc, NULL);
1525
1526 if (edesc->dma_len)
1527 dma_unmap_single(dev, edesc->dma_link_tbl, edesc->dma_len,
1528 DMA_BIDIRECTIONAL);
1529
1530 }
1531
1532 static void ahash_done(struct device *dev,
1533 struct talitos_desc *desc, void *context,
1534 int err)
1535 {
1536 struct ahash_request *areq = context;
1537 struct talitos_edesc *edesc =
1538 container_of(desc, struct talitos_edesc, desc);
1539 struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1540
1541 if (!req_ctx->last && req_ctx->to_hash_later) {
1542 /* Position any partial block for next update/final/finup */
1543 memcpy(req_ctx->buf, req_ctx->bufnext, req_ctx->to_hash_later);
1544 req_ctx->nbuf = req_ctx->to_hash_later;
1545 }
1546 common_nonsnoop_hash_unmap(dev, edesc, areq);
1547
1548 kfree(edesc);
1549
1550 areq->base.complete(&areq->base, err);
1551 }
1552
1553 static int common_nonsnoop_hash(struct talitos_edesc *edesc,
1554 struct ahash_request *areq, unsigned int length,
1555 void (*callback) (struct device *dev,
1556 struct talitos_desc *desc,
1557 void *context, int error))
1558 {
1559 struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
1560 struct talitos_ctx *ctx = crypto_ahash_ctx(tfm);
1561 struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1562 struct device *dev = ctx->dev;
1563 struct talitos_desc *desc = &edesc->desc;
1564 int sg_count, ret;
1565
1566 /* first DWORD empty */
1567 desc->ptr[0] = zero_entry;
1568
1569 /* hash context in */
1570 if (!req_ctx->first || req_ctx->swinit) {
1571 map_single_talitos_ptr(dev, &desc->ptr[1],
1572 req_ctx->hw_context_size,
1573 (char *)req_ctx->hw_context, 0,
1574 DMA_TO_DEVICE);
1575 req_ctx->swinit = 0;
1576 } else {
1577 desc->ptr[1] = zero_entry;
1578 /* Indicate next op is not the first. */
1579 req_ctx->first = 0;
1580 }
1581
1582 /* HMAC key */
1583 if (ctx->keylen)
1584 map_single_talitos_ptr(dev, &desc->ptr[2], ctx->keylen,
1585 (char *)&ctx->key, 0, DMA_TO_DEVICE);
1586 else
1587 desc->ptr[2] = zero_entry;
1588
1589 /*
1590 * data in
1591 */
1592 desc->ptr[3].len = cpu_to_be16(length);
1593 desc->ptr[3].j_extent = 0;
1594
1595 sg_count = talitos_map_sg(dev, req_ctx->psrc,
1596 edesc->src_nents ? : 1,
1597 DMA_TO_DEVICE, edesc->src_chained);
1598
1599 if (sg_count == 1) {
1600 to_talitos_ptr(&desc->ptr[3], sg_dma_address(req_ctx->psrc));
1601 } else {
1602 sg_count = sg_to_link_tbl(req_ctx->psrc, sg_count, length,
1603 &edesc->link_tbl[0]);
1604 if (sg_count > 1) {
1605 desc->ptr[3].j_extent |= DESC_PTR_LNKTBL_JUMP;
1606 to_talitos_ptr(&desc->ptr[3], edesc->dma_link_tbl);
1607 dma_sync_single_for_device(ctx->dev,
1608 edesc->dma_link_tbl,
1609 edesc->dma_len,
1610 DMA_BIDIRECTIONAL);
1611 } else {
1612 /* Only one segment now, so no link tbl needed */
1613 to_talitos_ptr(&desc->ptr[3],
1614 sg_dma_address(req_ctx->psrc));
1615 }
1616 }
1617
1618 /* fifth DWORD empty */
1619 desc->ptr[4] = zero_entry;
1620
1621 /* hash/HMAC out -or- hash context out */
1622 if (req_ctx->last)
1623 map_single_talitos_ptr(dev, &desc->ptr[5],
1624 crypto_ahash_digestsize(tfm),
1625 areq->result, 0, DMA_FROM_DEVICE);
1626 else
1627 map_single_talitos_ptr(dev, &desc->ptr[5],
1628 req_ctx->hw_context_size,
1629 req_ctx->hw_context, 0, DMA_FROM_DEVICE);
1630
1631 /* last DWORD empty */
1632 desc->ptr[6] = zero_entry;
1633
1634 ret = talitos_submit(dev, ctx->ch, desc, callback, areq);
1635 if (ret != -EINPROGRESS) {
1636 common_nonsnoop_hash_unmap(dev, edesc, areq);
1637 kfree(edesc);
1638 }
1639 return ret;
1640 }
1641
1642 static struct talitos_edesc *ahash_edesc_alloc(struct ahash_request *areq,
1643 unsigned int nbytes)
1644 {
1645 struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
1646 struct talitos_ctx *ctx = crypto_ahash_ctx(tfm);
1647 struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1648
1649 return talitos_edesc_alloc(ctx->dev, NULL, req_ctx->psrc, NULL, NULL, 0,
1650 nbytes, 0, 0, 0, areq->base.flags, false);
1651 }
1652
1653 static int ahash_init(struct ahash_request *areq)
1654 {
1655 struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
1656 struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1657
1658 /* Initialize the context */
1659 req_ctx->nbuf = 0;
1660 req_ctx->first = 1; /* first indicates h/w must init its context */
1661 req_ctx->swinit = 0; /* assume h/w init of context */
1662 req_ctx->hw_context_size =
1663 (crypto_ahash_digestsize(tfm) <= SHA256_DIGEST_SIZE)
1664 ? TALITOS_MDEU_CONTEXT_SIZE_MD5_SHA1_SHA256
1665 : TALITOS_MDEU_CONTEXT_SIZE_SHA384_SHA512;
1666
1667 return 0;
1668 }
1669
1670 /*
1671 * on h/w without explicit sha224 support, we initialize h/w context
1672 * manually with sha224 constants, and tell it to run sha256.
1673 */
1674 static int ahash_init_sha224_swinit(struct ahash_request *areq)
1675 {
1676 struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1677
1678 ahash_init(areq);
1679 req_ctx->swinit = 1;/* prevent h/w initting context with sha256 values*/
1680
1681 req_ctx->hw_context[0] = SHA224_H0;
1682 req_ctx->hw_context[1] = SHA224_H1;
1683 req_ctx->hw_context[2] = SHA224_H2;
1684 req_ctx->hw_context[3] = SHA224_H3;
1685 req_ctx->hw_context[4] = SHA224_H4;
1686 req_ctx->hw_context[5] = SHA224_H5;
1687 req_ctx->hw_context[6] = SHA224_H6;
1688 req_ctx->hw_context[7] = SHA224_H7;
1689
1690 /* init 64-bit count */
1691 req_ctx->hw_context[8] = 0;
1692 req_ctx->hw_context[9] = 0;
1693
1694 return 0;
1695 }
1696
1697 static int ahash_process_req(struct ahash_request *areq, unsigned int nbytes)
1698 {
1699 struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
1700 struct talitos_ctx *ctx = crypto_ahash_ctx(tfm);
1701 struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1702 struct talitos_edesc *edesc;
1703 unsigned int blocksize =
1704 crypto_tfm_alg_blocksize(crypto_ahash_tfm(tfm));
1705 unsigned int nbytes_to_hash;
1706 unsigned int to_hash_later;
1707 unsigned int nsg;
1708 bool chained;
1709
1710 if (!req_ctx->last && (nbytes + req_ctx->nbuf <= blocksize)) {
1711 /* Buffer up to one whole block */
1712 sg_copy_to_buffer(areq->src,
1713 sg_count(areq->src, nbytes, &chained),
1714 req_ctx->buf + req_ctx->nbuf, nbytes);
1715 req_ctx->nbuf += nbytes;
1716 return 0;
1717 }
1718
1719 /* At least (blocksize + 1) bytes are available to hash */
1720 nbytes_to_hash = nbytes + req_ctx->nbuf;
1721 to_hash_later = nbytes_to_hash & (blocksize - 1);
1722
1723 if (req_ctx->last)
1724 to_hash_later = 0;
1725 else if (to_hash_later)
1726 /* There is a partial block. Hash the full block(s) now */
1727 nbytes_to_hash -= to_hash_later;
1728 else {
1729 /* Keep one block buffered */
1730 nbytes_to_hash -= blocksize;
1731 to_hash_later = blocksize;
1732 }
1733
1734 /* Chain in any previously buffered data */
1735 if (req_ctx->nbuf) {
1736 nsg = (req_ctx->nbuf < nbytes_to_hash) ? 2 : 1;
1737 sg_init_table(req_ctx->bufsl, nsg);
1738 sg_set_buf(req_ctx->bufsl, req_ctx->buf, req_ctx->nbuf);
1739 if (nsg > 1)
1740 scatterwalk_sg_chain(req_ctx->bufsl, 2, areq->src);
1741 req_ctx->psrc = req_ctx->bufsl;
1742 } else
1743 req_ctx->psrc = areq->src;
1744
1745 if (to_hash_later) {
1746 int nents = sg_count(areq->src, nbytes, &chained);
1747 sg_pcopy_to_buffer(areq->src, nents,
1748 req_ctx->bufnext,
1749 to_hash_later,
1750 nbytes - to_hash_later);
1751 }
1752 req_ctx->to_hash_later = to_hash_later;
1753
1754 /* Allocate extended descriptor */
1755 edesc = ahash_edesc_alloc(areq, nbytes_to_hash);
1756 if (IS_ERR(edesc))
1757 return PTR_ERR(edesc);
1758
1759 edesc->desc.hdr = ctx->desc_hdr_template;
1760
1761 /* On last one, request SEC to pad; otherwise continue */
1762 if (req_ctx->last)
1763 edesc->desc.hdr |= DESC_HDR_MODE0_MDEU_PAD;
1764 else
1765 edesc->desc.hdr |= DESC_HDR_MODE0_MDEU_CONT;
1766
1767 /* request SEC to INIT hash. */
1768 if (req_ctx->first && !req_ctx->swinit)
1769 edesc->desc.hdr |= DESC_HDR_MODE0_MDEU_INIT;
1770
1771 /* When the tfm context has a keylen, it's an HMAC.
1772 * A first or last (ie. not middle) descriptor must request HMAC.
1773 */
1774 if (ctx->keylen && (req_ctx->first || req_ctx->last))
1775 edesc->desc.hdr |= DESC_HDR_MODE0_MDEU_HMAC;
1776
1777 return common_nonsnoop_hash(edesc, areq, nbytes_to_hash,
1778 ahash_done);
1779 }
1780
1781 static int ahash_update(struct ahash_request *areq)
1782 {
1783 struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1784
1785 req_ctx->last = 0;
1786
1787 return ahash_process_req(areq, areq->nbytes);
1788 }
1789
1790 static int ahash_final(struct ahash_request *areq)
1791 {
1792 struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1793
1794 req_ctx->last = 1;
1795
1796 return ahash_process_req(areq, 0);
1797 }
1798
1799 static int ahash_finup(struct ahash_request *areq)
1800 {
1801 struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1802
1803 req_ctx->last = 1;
1804
1805 return ahash_process_req(areq, areq->nbytes);
1806 }
1807
1808 static int ahash_digest(struct ahash_request *areq)
1809 {
1810 struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1811 struct crypto_ahash *ahash = crypto_ahash_reqtfm(areq);
1812
1813 ahash->init(areq);
1814 req_ctx->last = 1;
1815
1816 return ahash_process_req(areq, areq->nbytes);
1817 }
1818
1819 struct keyhash_result {
1820 struct completion completion;
1821 int err;
1822 };
1823
1824 static void keyhash_complete(struct crypto_async_request *req, int err)
1825 {
1826 struct keyhash_result *res = req->data;
1827
1828 if (err == -EINPROGRESS)
1829 return;
1830
1831 res->err = err;
1832 complete(&res->completion);
1833 }
1834
1835 static int keyhash(struct crypto_ahash *tfm, const u8 *key, unsigned int keylen,
1836 u8 *hash)
1837 {
1838 struct talitos_ctx *ctx = crypto_tfm_ctx(crypto_ahash_tfm(tfm));
1839
1840 struct scatterlist sg[1];
1841 struct ahash_request *req;
1842 struct keyhash_result hresult;
1843 int ret;
1844
1845 init_completion(&hresult.completion);
1846
1847 req = ahash_request_alloc(tfm, GFP_KERNEL);
1848 if (!req)
1849 return -ENOMEM;
1850
1851 /* Keep tfm keylen == 0 during hash of the long key */
1852 ctx->keylen = 0;
1853 ahash_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
1854 keyhash_complete, &hresult);
1855
1856 sg_init_one(&sg[0], key, keylen);
1857
1858 ahash_request_set_crypt(req, sg, hash, keylen);
1859 ret = crypto_ahash_digest(req);
1860 switch (ret) {
1861 case 0:
1862 break;
1863 case -EINPROGRESS:
1864 case -EBUSY:
1865 ret = wait_for_completion_interruptible(
1866 &hresult.completion);
1867 if (!ret)
1868 ret = hresult.err;
1869 break;
1870 default:
1871 break;
1872 }
1873 ahash_request_free(req);
1874
1875 return ret;
1876 }
1877
1878 static int ahash_setkey(struct crypto_ahash *tfm, const u8 *key,
1879 unsigned int keylen)
1880 {
1881 struct talitos_ctx *ctx = crypto_tfm_ctx(crypto_ahash_tfm(tfm));
1882 unsigned int blocksize =
1883 crypto_tfm_alg_blocksize(crypto_ahash_tfm(tfm));
1884 unsigned int digestsize = crypto_ahash_digestsize(tfm);
1885 unsigned int keysize = keylen;
1886 u8 hash[SHA512_DIGEST_SIZE];
1887 int ret;
1888
1889 if (keylen <= blocksize)
1890 memcpy(ctx->key, key, keysize);
1891 else {
1892 /* Must get the hash of the long key */
1893 ret = keyhash(tfm, key, keylen, hash);
1894
1895 if (ret) {
1896 crypto_ahash_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
1897 return -EINVAL;
1898 }
1899
1900 keysize = digestsize;
1901 memcpy(ctx->key, hash, digestsize);
1902 }
1903
1904 ctx->keylen = keysize;
1905
1906 return 0;
1907 }
1908
1909
1910 struct talitos_alg_template {
1911 u32 type;
1912 union {
1913 struct crypto_alg crypto;
1914 struct ahash_alg hash;
1915 } alg;
1916 __be32 desc_hdr_template;
1917 };
1918
1919 static struct talitos_alg_template driver_algs[] = {
1920 /* AEAD algorithms. These use a single-pass ipsec_esp descriptor */
1921 { .type = CRYPTO_ALG_TYPE_AEAD,
1922 .alg.crypto = {
1923 .cra_name = "authenc(hmac(sha1),cbc(aes))",
1924 .cra_driver_name = "authenc-hmac-sha1-cbc-aes-talitos",
1925 .cra_blocksize = AES_BLOCK_SIZE,
1926 .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
1927 .cra_aead = {
1928 .ivsize = AES_BLOCK_SIZE,
1929 .maxauthsize = SHA1_DIGEST_SIZE,
1930 }
1931 },
1932 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
1933 DESC_HDR_SEL0_AESU |
1934 DESC_HDR_MODE0_AESU_CBC |
1935 DESC_HDR_SEL1_MDEUA |
1936 DESC_HDR_MODE1_MDEU_INIT |
1937 DESC_HDR_MODE1_MDEU_PAD |
1938 DESC_HDR_MODE1_MDEU_SHA1_HMAC,
1939 },
1940 { .type = CRYPTO_ALG_TYPE_AEAD,
1941 .alg.crypto = {
1942 .cra_name = "authenc(hmac(sha1),cbc(des3_ede))",
1943 .cra_driver_name = "authenc-hmac-sha1-cbc-3des-talitos",
1944 .cra_blocksize = DES3_EDE_BLOCK_SIZE,
1945 .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
1946 .cra_aead = {
1947 .ivsize = DES3_EDE_BLOCK_SIZE,
1948 .maxauthsize = SHA1_DIGEST_SIZE,
1949 }
1950 },
1951 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
1952 DESC_HDR_SEL0_DEU |
1953 DESC_HDR_MODE0_DEU_CBC |
1954 DESC_HDR_MODE0_DEU_3DES |
1955 DESC_HDR_SEL1_MDEUA |
1956 DESC_HDR_MODE1_MDEU_INIT |
1957 DESC_HDR_MODE1_MDEU_PAD |
1958 DESC_HDR_MODE1_MDEU_SHA1_HMAC,
1959 },
1960 { .type = CRYPTO_ALG_TYPE_AEAD,
1961 .alg.crypto = {
1962 .cra_name = "authenc(hmac(sha224),cbc(aes))",
1963 .cra_driver_name = "authenc-hmac-sha224-cbc-aes-talitos",
1964 .cra_blocksize = AES_BLOCK_SIZE,
1965 .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
1966 .cra_aead = {
1967 .ivsize = AES_BLOCK_SIZE,
1968 .maxauthsize = SHA224_DIGEST_SIZE,
1969 }
1970 },
1971 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
1972 DESC_HDR_SEL0_AESU |
1973 DESC_HDR_MODE0_AESU_CBC |
1974 DESC_HDR_SEL1_MDEUA |
1975 DESC_HDR_MODE1_MDEU_INIT |
1976 DESC_HDR_MODE1_MDEU_PAD |
1977 DESC_HDR_MODE1_MDEU_SHA224_HMAC,
1978 },
1979 { .type = CRYPTO_ALG_TYPE_AEAD,
1980 .alg.crypto = {
1981 .cra_name = "authenc(hmac(sha224),cbc(des3_ede))",
1982 .cra_driver_name = "authenc-hmac-sha224-cbc-3des-talitos",
1983 .cra_blocksize = DES3_EDE_BLOCK_SIZE,
1984 .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
1985 .cra_aead = {
1986 .ivsize = DES3_EDE_BLOCK_SIZE,
1987 .maxauthsize = SHA224_DIGEST_SIZE,
1988 }
1989 },
1990 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
1991 DESC_HDR_SEL0_DEU |
1992 DESC_HDR_MODE0_DEU_CBC |
1993 DESC_HDR_MODE0_DEU_3DES |
1994 DESC_HDR_SEL1_MDEUA |
1995 DESC_HDR_MODE1_MDEU_INIT |
1996 DESC_HDR_MODE1_MDEU_PAD |
1997 DESC_HDR_MODE1_MDEU_SHA224_HMAC,
1998 },
1999 { .type = CRYPTO_ALG_TYPE_AEAD,
2000 .alg.crypto = {
2001 .cra_name = "authenc(hmac(sha256),cbc(aes))",
2002 .cra_driver_name = "authenc-hmac-sha256-cbc-aes-talitos",
2003 .cra_blocksize = AES_BLOCK_SIZE,
2004 .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
2005 .cra_aead = {
2006 .ivsize = AES_BLOCK_SIZE,
2007 .maxauthsize = SHA256_DIGEST_SIZE,
2008 }
2009 },
2010 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
2011 DESC_HDR_SEL0_AESU |
2012 DESC_HDR_MODE0_AESU_CBC |
2013 DESC_HDR_SEL1_MDEUA |
2014 DESC_HDR_MODE1_MDEU_INIT |
2015 DESC_HDR_MODE1_MDEU_PAD |
2016 DESC_HDR_MODE1_MDEU_SHA256_HMAC,
2017 },
2018 { .type = CRYPTO_ALG_TYPE_AEAD,
2019 .alg.crypto = {
2020 .cra_name = "authenc(hmac(sha256),cbc(des3_ede))",
2021 .cra_driver_name = "authenc-hmac-sha256-cbc-3des-talitos",
2022 .cra_blocksize = DES3_EDE_BLOCK_SIZE,
2023 .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
2024 .cra_aead = {
2025 .ivsize = DES3_EDE_BLOCK_SIZE,
2026 .maxauthsize = SHA256_DIGEST_SIZE,
2027 }
2028 },
2029 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
2030 DESC_HDR_SEL0_DEU |
2031 DESC_HDR_MODE0_DEU_CBC |
2032 DESC_HDR_MODE0_DEU_3DES |
2033 DESC_HDR_SEL1_MDEUA |
2034 DESC_HDR_MODE1_MDEU_INIT |
2035 DESC_HDR_MODE1_MDEU_PAD |
2036 DESC_HDR_MODE1_MDEU_SHA256_HMAC,
2037 },
2038 { .type = CRYPTO_ALG_TYPE_AEAD,
2039 .alg.crypto = {
2040 .cra_name = "authenc(hmac(sha384),cbc(aes))",
2041 .cra_driver_name = "authenc-hmac-sha384-cbc-aes-talitos",
2042 .cra_blocksize = AES_BLOCK_SIZE,
2043 .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
2044 .cra_aead = {
2045 .ivsize = AES_BLOCK_SIZE,
2046 .maxauthsize = SHA384_DIGEST_SIZE,
2047 }
2048 },
2049 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
2050 DESC_HDR_SEL0_AESU |
2051 DESC_HDR_MODE0_AESU_CBC |
2052 DESC_HDR_SEL1_MDEUB |
2053 DESC_HDR_MODE1_MDEU_INIT |
2054 DESC_HDR_MODE1_MDEU_PAD |
2055 DESC_HDR_MODE1_MDEUB_SHA384_HMAC,
2056 },
2057 { .type = CRYPTO_ALG_TYPE_AEAD,
2058 .alg.crypto = {
2059 .cra_name = "authenc(hmac(sha384),cbc(des3_ede))",
2060 .cra_driver_name = "authenc-hmac-sha384-cbc-3des-talitos",
2061 .cra_blocksize = DES3_EDE_BLOCK_SIZE,
2062 .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
2063 .cra_aead = {
2064 .ivsize = DES3_EDE_BLOCK_SIZE,
2065 .maxauthsize = SHA384_DIGEST_SIZE,
2066 }
2067 },
2068 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
2069 DESC_HDR_SEL0_DEU |
2070 DESC_HDR_MODE0_DEU_CBC |
2071 DESC_HDR_MODE0_DEU_3DES |
2072 DESC_HDR_SEL1_MDEUB |
2073 DESC_HDR_MODE1_MDEU_INIT |
2074 DESC_HDR_MODE1_MDEU_PAD |
2075 DESC_HDR_MODE1_MDEUB_SHA384_HMAC,
2076 },
2077 { .type = CRYPTO_ALG_TYPE_AEAD,
2078 .alg.crypto = {
2079 .cra_name = "authenc(hmac(sha512),cbc(aes))",
2080 .cra_driver_name = "authenc-hmac-sha512-cbc-aes-talitos",
2081 .cra_blocksize = AES_BLOCK_SIZE,
2082 .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
2083 .cra_aead = {
2084 .ivsize = AES_BLOCK_SIZE,
2085 .maxauthsize = SHA512_DIGEST_SIZE,
2086 }
2087 },
2088 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
2089 DESC_HDR_SEL0_AESU |
2090 DESC_HDR_MODE0_AESU_CBC |
2091 DESC_HDR_SEL1_MDEUB |
2092 DESC_HDR_MODE1_MDEU_INIT |
2093 DESC_HDR_MODE1_MDEU_PAD |
2094 DESC_HDR_MODE1_MDEUB_SHA512_HMAC,
2095 },
2096 { .type = CRYPTO_ALG_TYPE_AEAD,
2097 .alg.crypto = {
2098 .cra_name = "authenc(hmac(sha512),cbc(des3_ede))",
2099 .cra_driver_name = "authenc-hmac-sha512-cbc-3des-talitos",
2100 .cra_blocksize = DES3_EDE_BLOCK_SIZE,
2101 .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
2102 .cra_aead = {
2103 .ivsize = DES3_EDE_BLOCK_SIZE,
2104 .maxauthsize = SHA512_DIGEST_SIZE,
2105 }
2106 },
2107 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
2108 DESC_HDR_SEL0_DEU |
2109 DESC_HDR_MODE0_DEU_CBC |
2110 DESC_HDR_MODE0_DEU_3DES |
2111 DESC_HDR_SEL1_MDEUB |
2112 DESC_HDR_MODE1_MDEU_INIT |
2113 DESC_HDR_MODE1_MDEU_PAD |
2114 DESC_HDR_MODE1_MDEUB_SHA512_HMAC,
2115 },
2116 { .type = CRYPTO_ALG_TYPE_AEAD,
2117 .alg.crypto = {
2118 .cra_name = "authenc(hmac(md5),cbc(aes))",
2119 .cra_driver_name = "authenc-hmac-md5-cbc-aes-talitos",
2120 .cra_blocksize = AES_BLOCK_SIZE,
2121 .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
2122 .cra_aead = {
2123 .ivsize = AES_BLOCK_SIZE,
2124 .maxauthsize = MD5_DIGEST_SIZE,
2125 }
2126 },
2127 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
2128 DESC_HDR_SEL0_AESU |
2129 DESC_HDR_MODE0_AESU_CBC |
2130 DESC_HDR_SEL1_MDEUA |
2131 DESC_HDR_MODE1_MDEU_INIT |
2132 DESC_HDR_MODE1_MDEU_PAD |
2133 DESC_HDR_MODE1_MDEU_MD5_HMAC,
2134 },
2135 { .type = CRYPTO_ALG_TYPE_AEAD,
2136 .alg.crypto = {
2137 .cra_name = "authenc(hmac(md5),cbc(des3_ede))",
2138 .cra_driver_name = "authenc-hmac-md5-cbc-3des-talitos",
2139 .cra_blocksize = DES3_EDE_BLOCK_SIZE,
2140 .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
2141 .cra_aead = {
2142 .ivsize = DES3_EDE_BLOCK_SIZE,
2143 .maxauthsize = MD5_DIGEST_SIZE,
2144 }
2145 },
2146 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
2147 DESC_HDR_SEL0_DEU |
2148 DESC_HDR_MODE0_DEU_CBC |
2149 DESC_HDR_MODE0_DEU_3DES |
2150 DESC_HDR_SEL1_MDEUA |
2151 DESC_HDR_MODE1_MDEU_INIT |
2152 DESC_HDR_MODE1_MDEU_PAD |
2153 DESC_HDR_MODE1_MDEU_MD5_HMAC,
2154 },
2155 /* ABLKCIPHER algorithms. */
2156 { .type = CRYPTO_ALG_TYPE_ABLKCIPHER,
2157 .alg.crypto = {
2158 .cra_name = "cbc(aes)",
2159 .cra_driver_name = "cbc-aes-talitos",
2160 .cra_blocksize = AES_BLOCK_SIZE,
2161 .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
2162 CRYPTO_ALG_ASYNC,
2163 .cra_ablkcipher = {
2164 .min_keysize = AES_MIN_KEY_SIZE,
2165 .max_keysize = AES_MAX_KEY_SIZE,
2166 .ivsize = AES_BLOCK_SIZE,
2167 }
2168 },
2169 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2170 DESC_HDR_SEL0_AESU |
2171 DESC_HDR_MODE0_AESU_CBC,
2172 },
2173 { .type = CRYPTO_ALG_TYPE_ABLKCIPHER,
2174 .alg.crypto = {
2175 .cra_name = "cbc(des3_ede)",
2176 .cra_driver_name = "cbc-3des-talitos",
2177 .cra_blocksize = DES3_EDE_BLOCK_SIZE,
2178 .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
2179 CRYPTO_ALG_ASYNC,
2180 .cra_ablkcipher = {
2181 .min_keysize = DES3_EDE_KEY_SIZE,
2182 .max_keysize = DES3_EDE_KEY_SIZE,
2183 .ivsize = DES3_EDE_BLOCK_SIZE,
2184 }
2185 },
2186 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2187 DESC_HDR_SEL0_DEU |
2188 DESC_HDR_MODE0_DEU_CBC |
2189 DESC_HDR_MODE0_DEU_3DES,
2190 },
2191 /* AHASH algorithms. */
2192 { .type = CRYPTO_ALG_TYPE_AHASH,
2193 .alg.hash = {
2194 .halg.digestsize = MD5_DIGEST_SIZE,
2195 .halg.base = {
2196 .cra_name = "md5",
2197 .cra_driver_name = "md5-talitos",
2198 .cra_blocksize = MD5_BLOCK_SIZE,
2199 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2200 CRYPTO_ALG_ASYNC,
2201 }
2202 },
2203 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2204 DESC_HDR_SEL0_MDEUA |
2205 DESC_HDR_MODE0_MDEU_MD5,
2206 },
2207 { .type = CRYPTO_ALG_TYPE_AHASH,
2208 .alg.hash = {
2209 .halg.digestsize = SHA1_DIGEST_SIZE,
2210 .halg.base = {
2211 .cra_name = "sha1",
2212 .cra_driver_name = "sha1-talitos",
2213 .cra_blocksize = SHA1_BLOCK_SIZE,
2214 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2215 CRYPTO_ALG_ASYNC,
2216 }
2217 },
2218 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2219 DESC_HDR_SEL0_MDEUA |
2220 DESC_HDR_MODE0_MDEU_SHA1,
2221 },
2222 { .type = CRYPTO_ALG_TYPE_AHASH,
2223 .alg.hash = {
2224 .halg.digestsize = SHA224_DIGEST_SIZE,
2225 .halg.base = {
2226 .cra_name = "sha224",
2227 .cra_driver_name = "sha224-talitos",
2228 .cra_blocksize = SHA224_BLOCK_SIZE,
2229 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2230 CRYPTO_ALG_ASYNC,
2231 }
2232 },
2233 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2234 DESC_HDR_SEL0_MDEUA |
2235 DESC_HDR_MODE0_MDEU_SHA224,
2236 },
2237 { .type = CRYPTO_ALG_TYPE_AHASH,
2238 .alg.hash = {
2239 .halg.digestsize = SHA256_DIGEST_SIZE,
2240 .halg.base = {
2241 .cra_name = "sha256",
2242 .cra_driver_name = "sha256-talitos",
2243 .cra_blocksize = SHA256_BLOCK_SIZE,
2244 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2245 CRYPTO_ALG_ASYNC,
2246 }
2247 },
2248 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2249 DESC_HDR_SEL0_MDEUA |
2250 DESC_HDR_MODE0_MDEU_SHA256,
2251 },
2252 { .type = CRYPTO_ALG_TYPE_AHASH,
2253 .alg.hash = {
2254 .halg.digestsize = SHA384_DIGEST_SIZE,
2255 .halg.base = {
2256 .cra_name = "sha384",
2257 .cra_driver_name = "sha384-talitos",
2258 .cra_blocksize = SHA384_BLOCK_SIZE,
2259 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2260 CRYPTO_ALG_ASYNC,
2261 }
2262 },
2263 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2264 DESC_HDR_SEL0_MDEUB |
2265 DESC_HDR_MODE0_MDEUB_SHA384,
2266 },
2267 { .type = CRYPTO_ALG_TYPE_AHASH,
2268 .alg.hash = {
2269 .halg.digestsize = SHA512_DIGEST_SIZE,
2270 .halg.base = {
2271 .cra_name = "sha512",
2272 .cra_driver_name = "sha512-talitos",
2273 .cra_blocksize = SHA512_BLOCK_SIZE,
2274 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2275 CRYPTO_ALG_ASYNC,
2276 }
2277 },
2278 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2279 DESC_HDR_SEL0_MDEUB |
2280 DESC_HDR_MODE0_MDEUB_SHA512,
2281 },
2282 { .type = CRYPTO_ALG_TYPE_AHASH,
2283 .alg.hash = {
2284 .halg.digestsize = MD5_DIGEST_SIZE,
2285 .halg.base = {
2286 .cra_name = "hmac(md5)",
2287 .cra_driver_name = "hmac-md5-talitos",
2288 .cra_blocksize = MD5_BLOCK_SIZE,
2289 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2290 CRYPTO_ALG_ASYNC,
2291 }
2292 },
2293 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2294 DESC_HDR_SEL0_MDEUA |
2295 DESC_HDR_MODE0_MDEU_MD5,
2296 },
2297 { .type = CRYPTO_ALG_TYPE_AHASH,
2298 .alg.hash = {
2299 .halg.digestsize = SHA1_DIGEST_SIZE,
2300 .halg.base = {
2301 .cra_name = "hmac(sha1)",
2302 .cra_driver_name = "hmac-sha1-talitos",
2303 .cra_blocksize = SHA1_BLOCK_SIZE,
2304 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2305 CRYPTO_ALG_ASYNC,
2306 }
2307 },
2308 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2309 DESC_HDR_SEL0_MDEUA |
2310 DESC_HDR_MODE0_MDEU_SHA1,
2311 },
2312 { .type = CRYPTO_ALG_TYPE_AHASH,
2313 .alg.hash = {
2314 .halg.digestsize = SHA224_DIGEST_SIZE,
2315 .halg.base = {
2316 .cra_name = "hmac(sha224)",
2317 .cra_driver_name = "hmac-sha224-talitos",
2318 .cra_blocksize = SHA224_BLOCK_SIZE,
2319 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2320 CRYPTO_ALG_ASYNC,
2321 }
2322 },
2323 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2324 DESC_HDR_SEL0_MDEUA |
2325 DESC_HDR_MODE0_MDEU_SHA224,
2326 },
2327 { .type = CRYPTO_ALG_TYPE_AHASH,
2328 .alg.hash = {
2329 .halg.digestsize = SHA256_DIGEST_SIZE,
2330 .halg.base = {
2331 .cra_name = "hmac(sha256)",
2332 .cra_driver_name = "hmac-sha256-talitos",
2333 .cra_blocksize = SHA256_BLOCK_SIZE,
2334 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2335 CRYPTO_ALG_ASYNC,
2336 }
2337 },
2338 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2339 DESC_HDR_SEL0_MDEUA |
2340 DESC_HDR_MODE0_MDEU_SHA256,
2341 },
2342 { .type = CRYPTO_ALG_TYPE_AHASH,
2343 .alg.hash = {
2344 .halg.digestsize = SHA384_DIGEST_SIZE,
2345 .halg.base = {
2346 .cra_name = "hmac(sha384)",
2347 .cra_driver_name = "hmac-sha384-talitos",
2348 .cra_blocksize = SHA384_BLOCK_SIZE,
2349 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2350 CRYPTO_ALG_ASYNC,
2351 }
2352 },
2353 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2354 DESC_HDR_SEL0_MDEUB |
2355 DESC_HDR_MODE0_MDEUB_SHA384,
2356 },
2357 { .type = CRYPTO_ALG_TYPE_AHASH,
2358 .alg.hash = {
2359 .halg.digestsize = SHA512_DIGEST_SIZE,
2360 .halg.base = {
2361 .cra_name = "hmac(sha512)",
2362 .cra_driver_name = "hmac-sha512-talitos",
2363 .cra_blocksize = SHA512_BLOCK_SIZE,
2364 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2365 CRYPTO_ALG_ASYNC,
2366 }
2367 },
2368 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2369 DESC_HDR_SEL0_MDEUB |
2370 DESC_HDR_MODE0_MDEUB_SHA512,
2371 }
2372 };
2373
2374 struct talitos_crypto_alg {
2375 struct list_head entry;
2376 struct device *dev;
2377 struct talitos_alg_template algt;
2378 };
2379
2380 static int talitos_cra_init(struct crypto_tfm *tfm)
2381 {
2382 struct crypto_alg *alg = tfm->__crt_alg;
2383 struct talitos_crypto_alg *talitos_alg;
2384 struct talitos_ctx *ctx = crypto_tfm_ctx(tfm);
2385 struct talitos_private *priv;
2386
2387 if ((alg->cra_flags & CRYPTO_ALG_TYPE_MASK) == CRYPTO_ALG_TYPE_AHASH)
2388 talitos_alg = container_of(__crypto_ahash_alg(alg),
2389 struct talitos_crypto_alg,
2390 algt.alg.hash);
2391 else
2392 talitos_alg = container_of(alg, struct talitos_crypto_alg,
2393 algt.alg.crypto);
2394
2395 /* update context with ptr to dev */
2396 ctx->dev = talitos_alg->dev;
2397
2398 /* assign SEC channel to tfm in round-robin fashion */
2399 priv = dev_get_drvdata(ctx->dev);
2400 ctx->ch = atomic_inc_return(&priv->last_chan) &
2401 (priv->num_channels - 1);
2402
2403 /* copy descriptor header template value */
2404 ctx->desc_hdr_template = talitos_alg->algt.desc_hdr_template;
2405
2406 /* select done notification */
2407 ctx->desc_hdr_template |= DESC_HDR_DONE_NOTIFY;
2408
2409 return 0;
2410 }
2411
2412 static int talitos_cra_init_aead(struct crypto_tfm *tfm)
2413 {
2414 struct talitos_ctx *ctx = crypto_tfm_ctx(tfm);
2415
2416 talitos_cra_init(tfm);
2417
2418 /* random first IV */
2419 get_random_bytes(ctx->iv, TALITOS_MAX_IV_LENGTH);
2420
2421 return 0;
2422 }
2423
2424 static int talitos_cra_init_ahash(struct crypto_tfm *tfm)
2425 {
2426 struct talitos_ctx *ctx = crypto_tfm_ctx(tfm);
2427
2428 talitos_cra_init(tfm);
2429
2430 ctx->keylen = 0;
2431 crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
2432 sizeof(struct talitos_ahash_req_ctx));
2433
2434 return 0;
2435 }
2436
2437 /*
2438 * given the alg's descriptor header template, determine whether descriptor
2439 * type and primary/secondary execution units required match the hw
2440 * capabilities description provided in the device tree node.
2441 */
2442 static int hw_supports(struct device *dev, __be32 desc_hdr_template)
2443 {
2444 struct talitos_private *priv = dev_get_drvdata(dev);
2445 int ret;
2446
2447 ret = (1 << DESC_TYPE(desc_hdr_template) & priv->desc_types) &&
2448 (1 << PRIMARY_EU(desc_hdr_template) & priv->exec_units);
2449
2450 if (SECONDARY_EU(desc_hdr_template))
2451 ret = ret && (1 << SECONDARY_EU(desc_hdr_template)
2452 & priv->exec_units);
2453
2454 return ret;
2455 }
2456
2457 static int talitos_remove(struct platform_device *ofdev)
2458 {
2459 struct device *dev = &ofdev->dev;
2460 struct talitos_private *priv = dev_get_drvdata(dev);
2461 struct talitos_crypto_alg *t_alg, *n;
2462 int i;
2463
2464 list_for_each_entry_safe(t_alg, n, &priv->alg_list, entry) {
2465 switch (t_alg->algt.type) {
2466 case CRYPTO_ALG_TYPE_ABLKCIPHER:
2467 case CRYPTO_ALG_TYPE_AEAD:
2468 crypto_unregister_alg(&t_alg->algt.alg.crypto);
2469 break;
2470 case CRYPTO_ALG_TYPE_AHASH:
2471 crypto_unregister_ahash(&t_alg->algt.alg.hash);
2472 break;
2473 }
2474 list_del(&t_alg->entry);
2475 kfree(t_alg);
2476 }
2477
2478 if (hw_supports(dev, DESC_HDR_SEL0_RNG))
2479 talitos_unregister_rng(dev);
2480
2481 for (i = 0; i < priv->num_channels; i++)
2482 kfree(priv->chan[i].fifo);
2483
2484 kfree(priv->chan);
2485
2486 for (i = 0; i < 2; i++)
2487 if (priv->irq[i]) {
2488 free_irq(priv->irq[i], dev);
2489 irq_dispose_mapping(priv->irq[i]);
2490 }
2491
2492 tasklet_kill(&priv->done_task[0]);
2493 if (priv->irq[1])
2494 tasklet_kill(&priv->done_task[1]);
2495
2496 iounmap(priv->reg);
2497
2498 kfree(priv);
2499
2500 return 0;
2501 }
2502
2503 static struct talitos_crypto_alg *talitos_alg_alloc(struct device *dev,
2504 struct talitos_alg_template
2505 *template)
2506 {
2507 struct talitos_private *priv = dev_get_drvdata(dev);
2508 struct talitos_crypto_alg *t_alg;
2509 struct crypto_alg *alg;
2510
2511 t_alg = kzalloc(sizeof(struct talitos_crypto_alg), GFP_KERNEL);
2512 if (!t_alg)
2513 return ERR_PTR(-ENOMEM);
2514
2515 t_alg->algt = *template;
2516
2517 switch (t_alg->algt.type) {
2518 case CRYPTO_ALG_TYPE_ABLKCIPHER:
2519 alg = &t_alg->algt.alg.crypto;
2520 alg->cra_init = talitos_cra_init;
2521 alg->cra_type = &crypto_ablkcipher_type;
2522 alg->cra_ablkcipher.setkey = ablkcipher_setkey;
2523 alg->cra_ablkcipher.encrypt = ablkcipher_encrypt;
2524 alg->cra_ablkcipher.decrypt = ablkcipher_decrypt;
2525 alg->cra_ablkcipher.geniv = "eseqiv";
2526 break;
2527 case CRYPTO_ALG_TYPE_AEAD:
2528 alg = &t_alg->algt.alg.crypto;
2529 alg->cra_init = talitos_cra_init_aead;
2530 alg->cra_type = &crypto_aead_type;
2531 alg->cra_aead.setkey = aead_setkey;
2532 alg->cra_aead.setauthsize = aead_setauthsize;
2533 alg->cra_aead.encrypt = aead_encrypt;
2534 alg->cra_aead.decrypt = aead_decrypt;
2535 alg->cra_aead.givencrypt = aead_givencrypt;
2536 alg->cra_aead.geniv = "<built-in>";
2537 break;
2538 case CRYPTO_ALG_TYPE_AHASH:
2539 alg = &t_alg->algt.alg.hash.halg.base;
2540 alg->cra_init = talitos_cra_init_ahash;
2541 alg->cra_type = &crypto_ahash_type;
2542 t_alg->algt.alg.hash.init = ahash_init;
2543 t_alg->algt.alg.hash.update = ahash_update;
2544 t_alg->algt.alg.hash.final = ahash_final;
2545 t_alg->algt.alg.hash.finup = ahash_finup;
2546 t_alg->algt.alg.hash.digest = ahash_digest;
2547 t_alg->algt.alg.hash.setkey = ahash_setkey;
2548
2549 if (!(priv->features & TALITOS_FTR_HMAC_OK) &&
2550 !strncmp(alg->cra_name, "hmac", 4)) {
2551 kfree(t_alg);
2552 return ERR_PTR(-ENOTSUPP);
2553 }
2554 if (!(priv->features & TALITOS_FTR_SHA224_HWINIT) &&
2555 (!strcmp(alg->cra_name, "sha224") ||
2556 !strcmp(alg->cra_name, "hmac(sha224)"))) {
2557 t_alg->algt.alg.hash.init = ahash_init_sha224_swinit;
2558 t_alg->algt.desc_hdr_template =
2559 DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2560 DESC_HDR_SEL0_MDEUA |
2561 DESC_HDR_MODE0_MDEU_SHA256;
2562 }
2563 break;
2564 default:
2565 dev_err(dev, "unknown algorithm type %d\n", t_alg->algt.type);
2566 return ERR_PTR(-EINVAL);
2567 }
2568
2569 alg->cra_module = THIS_MODULE;
2570 alg->cra_priority = TALITOS_CRA_PRIORITY;
2571 alg->cra_alignmask = 0;
2572 alg->cra_ctxsize = sizeof(struct talitos_ctx);
2573 alg->cra_flags |= CRYPTO_ALG_KERN_DRIVER_ONLY;
2574
2575 t_alg->dev = dev;
2576
2577 return t_alg;
2578 }
2579
2580 static int talitos_probe_irq(struct platform_device *ofdev)
2581 {
2582 struct device *dev = &ofdev->dev;
2583 struct device_node *np = ofdev->dev.of_node;
2584 struct talitos_private *priv = dev_get_drvdata(dev);
2585 int err;
2586
2587 priv->irq[0] = irq_of_parse_and_map(np, 0);
2588 if (!priv->irq[0]) {
2589 dev_err(dev, "failed to map irq\n");
2590 return -EINVAL;
2591 }
2592
2593 priv->irq[1] = irq_of_parse_and_map(np, 1);
2594
2595 /* get the primary irq line */
2596 if (!priv->irq[1]) {
2597 err = request_irq(priv->irq[0], talitos_interrupt_4ch, 0,
2598 dev_driver_string(dev), dev);
2599 goto primary_out;
2600 }
2601
2602 err = request_irq(priv->irq[0], talitos_interrupt_ch0_2, 0,
2603 dev_driver_string(dev), dev);
2604 if (err)
2605 goto primary_out;
2606
2607 /* get the secondary irq line */
2608 err = request_irq(priv->irq[1], talitos_interrupt_ch1_3, 0,
2609 dev_driver_string(dev), dev);
2610 if (err) {
2611 dev_err(dev, "failed to request secondary irq\n");
2612 irq_dispose_mapping(priv->irq[1]);
2613 priv->irq[1] = 0;
2614 }
2615
2616 return err;
2617
2618 primary_out:
2619 if (err) {
2620 dev_err(dev, "failed to request primary irq\n");
2621 irq_dispose_mapping(priv->irq[0]);
2622 priv->irq[0] = 0;
2623 }
2624
2625 return err;
2626 }
2627
2628 static int talitos_probe(struct platform_device *ofdev)
2629 {
2630 struct device *dev = &ofdev->dev;
2631 struct device_node *np = ofdev->dev.of_node;
2632 struct talitos_private *priv;
2633 const unsigned int *prop;
2634 int i, err;
2635
2636 priv = kzalloc(sizeof(struct talitos_private), GFP_KERNEL);
2637 if (!priv)
2638 return -ENOMEM;
2639
2640 INIT_LIST_HEAD(&priv->alg_list);
2641
2642 dev_set_drvdata(dev, priv);
2643
2644 priv->ofdev = ofdev;
2645
2646 spin_lock_init(&priv->reg_lock);
2647
2648 err = talitos_probe_irq(ofdev);
2649 if (err)
2650 goto err_out;
2651
2652 if (!priv->irq[1]) {
2653 tasklet_init(&priv->done_task[0], talitos_done_4ch,
2654 (unsigned long)dev);
2655 } else {
2656 tasklet_init(&priv->done_task[0], talitos_done_ch0_2,
2657 (unsigned long)dev);
2658 tasklet_init(&priv->done_task[1], talitos_done_ch1_3,
2659 (unsigned long)dev);
2660 }
2661
2662 priv->reg = of_iomap(np, 0);
2663 if (!priv->reg) {
2664 dev_err(dev, "failed to of_iomap\n");
2665 err = -ENOMEM;
2666 goto err_out;
2667 }
2668
2669 /* get SEC version capabilities from device tree */
2670 prop = of_get_property(np, "fsl,num-channels", NULL);
2671 if (prop)
2672 priv->num_channels = *prop;
2673
2674 prop = of_get_property(np, "fsl,channel-fifo-len", NULL);
2675 if (prop)
2676 priv->chfifo_len = *prop;
2677
2678 prop = of_get_property(np, "fsl,exec-units-mask", NULL);
2679 if (prop)
2680 priv->exec_units = *prop;
2681
2682 prop = of_get_property(np, "fsl,descriptor-types-mask", NULL);
2683 if (prop)
2684 priv->desc_types = *prop;
2685
2686 if (!is_power_of_2(priv->num_channels) || !priv->chfifo_len ||
2687 !priv->exec_units || !priv->desc_types) {
2688 dev_err(dev, "invalid property data in device tree node\n");
2689 err = -EINVAL;
2690 goto err_out;
2691 }
2692
2693 if (of_device_is_compatible(np, "fsl,sec3.0"))
2694 priv->features |= TALITOS_FTR_SRC_LINK_TBL_LEN_INCLUDES_EXTENT;
2695
2696 if (of_device_is_compatible(np, "fsl,sec2.1"))
2697 priv->features |= TALITOS_FTR_HW_AUTH_CHECK |
2698 TALITOS_FTR_SHA224_HWINIT |
2699 TALITOS_FTR_HMAC_OK;
2700
2701 priv->chan = kzalloc(sizeof(struct talitos_channel) *
2702 priv->num_channels, GFP_KERNEL);
2703 if (!priv->chan) {
2704 dev_err(dev, "failed to allocate channel management space\n");
2705 err = -ENOMEM;
2706 goto err_out;
2707 }
2708
2709 for (i = 0; i < priv->num_channels; i++) {
2710 priv->chan[i].reg = priv->reg + TALITOS_CH_STRIDE * (i + 1);
2711 if (!priv->irq[1] || !(i & 1))
2712 priv->chan[i].reg += TALITOS_CH_BASE_OFFSET;
2713 }
2714
2715 for (i = 0; i < priv->num_channels; i++) {
2716 spin_lock_init(&priv->chan[i].head_lock);
2717 spin_lock_init(&priv->chan[i].tail_lock);
2718 }
2719
2720 priv->fifo_len = roundup_pow_of_two(priv->chfifo_len);
2721
2722 for (i = 0; i < priv->num_channels; i++) {
2723 priv->chan[i].fifo = kzalloc(sizeof(struct talitos_request) *
2724 priv->fifo_len, GFP_KERNEL);
2725 if (!priv->chan[i].fifo) {
2726 dev_err(dev, "failed to allocate request fifo %d\n", i);
2727 err = -ENOMEM;
2728 goto err_out;
2729 }
2730 }
2731
2732 for (i = 0; i < priv->num_channels; i++)
2733 atomic_set(&priv->chan[i].submit_count,
2734 -(priv->chfifo_len - 1));
2735
2736 dma_set_mask(dev, DMA_BIT_MASK(36));
2737
2738 /* reset and initialize the h/w */
2739 err = init_device(dev);
2740 if (err) {
2741 dev_err(dev, "failed to initialize device\n");
2742 goto err_out;
2743 }
2744
2745 /* register the RNG, if available */
2746 if (hw_supports(dev, DESC_HDR_SEL0_RNG)) {
2747 err = talitos_register_rng(dev);
2748 if (err) {
2749 dev_err(dev, "failed to register hwrng: %d\n", err);
2750 goto err_out;
2751 } else
2752 dev_info(dev, "hwrng\n");
2753 }
2754
2755 /* register crypto algorithms the device supports */
2756 for (i = 0; i < ARRAY_SIZE(driver_algs); i++) {
2757 if (hw_supports(dev, driver_algs[i].desc_hdr_template)) {
2758 struct talitos_crypto_alg *t_alg;
2759 char *name = NULL;
2760
2761 t_alg = talitos_alg_alloc(dev, &driver_algs[i]);
2762 if (IS_ERR(t_alg)) {
2763 err = PTR_ERR(t_alg);
2764 if (err == -ENOTSUPP)
2765 continue;
2766 goto err_out;
2767 }
2768
2769 switch (t_alg->algt.type) {
2770 case CRYPTO_ALG_TYPE_ABLKCIPHER:
2771 case CRYPTO_ALG_TYPE_AEAD:
2772 err = crypto_register_alg(
2773 &t_alg->algt.alg.crypto);
2774 name = t_alg->algt.alg.crypto.cra_driver_name;
2775 break;
2776 case CRYPTO_ALG_TYPE_AHASH:
2777 err = crypto_register_ahash(
2778 &t_alg->algt.alg.hash);
2779 name =
2780 t_alg->algt.alg.hash.halg.base.cra_driver_name;
2781 break;
2782 }
2783 if (err) {
2784 dev_err(dev, "%s alg registration failed\n",
2785 name);
2786 kfree(t_alg);
2787 } else
2788 list_add_tail(&t_alg->entry, &priv->alg_list);
2789 }
2790 }
2791 if (!list_empty(&priv->alg_list))
2792 dev_info(dev, "%s algorithms registered in /proc/crypto\n",
2793 (char *)of_get_property(np, "compatible", NULL));
2794
2795 return 0;
2796
2797 err_out:
2798 talitos_remove(ofdev);
2799
2800 return err;
2801 }
2802
2803 static const struct of_device_id talitos_match[] = {
2804 {
2805 .compatible = "fsl,sec2.0",
2806 },
2807 {},
2808 };
2809 MODULE_DEVICE_TABLE(of, talitos_match);
2810
2811 static struct platform_driver talitos_driver = {
2812 .driver = {
2813 .name = "talitos",
2814 .of_match_table = talitos_match,
2815 },
2816 .probe = talitos_probe,
2817 .remove = talitos_remove,
2818 };
2819
2820 module_platform_driver(talitos_driver);
2821
2822 MODULE_LICENSE("GPL");
2823 MODULE_AUTHOR("Kim Phillips <kim.phillips@freescale.com>");
2824 MODULE_DESCRIPTION("Freescale integrated security engine (SEC) driver");
(deprecated) Btrfs devel tree