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
to_talitos_ptr(struct talitos_ptr * talitos_ptr,dma_addr_t dma_addr)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 */
map_single_talitos_ptr(struct device * dev,struct talitos_ptr * talitos_ptr,unsigned short len,void * data,unsigned char extent,enum dma_data_direction dir)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 */
unmap_single_talitos_ptr(struct device * dev,struct talitos_ptr * talitos_ptr,enum dma_data_direction dir)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
reset_channel(struct device * dev,int ch)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
reset_device(struct device * dev)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 */
init_device(struct device * dev)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 */
talitos_submit(struct device * dev,int ch,struct talitos_desc * desc,void (* callback)(struct device * dev,struct talitos_desc * desc,void * context,int error),void * context)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 */
flush_channel(struct device * dev,int ch,int error,int reset_ch)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)
DEF_TALITOS_DONE(ch0_2,TALITOS_ISR_CH_0_2_DONE)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 */
report_eu_error(struct device * dev,int ch,u32 desc_hdr)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 */
talitos_error(struct device * dev,u32 isr,u32 isr_lo)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 */
talitos_rng_data_present(struct hwrng * rng,int wait)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
talitos_rng_data_read(struct hwrng * rng,u32 * data)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
talitos_rng_init(struct hwrng * rng)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
talitos_register_rng(struct device * dev)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
talitos_unregister_rng(struct device * dev)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 struct talitos_ctx {
641 struct device *dev;
642 int ch;
643 __be32 desc_hdr_template;
644 u8 key[TALITOS_MAX_KEY_SIZE];
645 u8 iv[TALITOS_MAX_IV_LENGTH];
646 unsigned int keylen;
647 unsigned int enckeylen;
648 unsigned int authkeylen;
649 unsigned int authsize;
650 };
651
652 #define HASH_MAX_BLOCK_SIZE SHA512_BLOCK_SIZE
653 #define TALITOS_MDEU_MAX_CONTEXT_SIZE TALITOS_MDEU_CONTEXT_SIZE_SHA384_SHA512
654
655 struct talitos_ahash_req_ctx {
656 u32 hw_context[TALITOS_MDEU_MAX_CONTEXT_SIZE / sizeof(u32)];
657 unsigned int hw_context_size;
658 u8 buf[HASH_MAX_BLOCK_SIZE];
659 u8 bufnext[HASH_MAX_BLOCK_SIZE];
660 unsigned int swinit;
661 unsigned int first;
662 unsigned int last;
663 unsigned int to_hash_later;
664 u64 nbuf;
665 struct scatterlist bufsl[2];
666 struct scatterlist *psrc;
667 };
668
aead_setauthsize(struct crypto_aead * authenc,unsigned int authsize)669 static int aead_setauthsize(struct crypto_aead *authenc,
670 unsigned int authsize)
671 {
672 struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
673
674 ctx->authsize = authsize;
675
676 return 0;
677 }
678
aead_setkey(struct crypto_aead * authenc,const u8 * key,unsigned int keylen)679 static int aead_setkey(struct crypto_aead *authenc,
680 const u8 *key, unsigned int keylen)
681 {
682 struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
683 struct crypto_authenc_keys keys;
684
685 if (crypto_authenc_extractkeys(&keys, key, keylen) != 0)
686 goto badkey;
687
688 if (keys.authkeylen + keys.enckeylen > TALITOS_MAX_KEY_SIZE)
689 goto badkey;
690
691 memcpy(ctx->key, keys.authkey, keys.authkeylen);
692 memcpy(&ctx->key[keys.authkeylen], keys.enckey, keys.enckeylen);
693
694 ctx->keylen = keys.authkeylen + keys.enckeylen;
695 ctx->enckeylen = keys.enckeylen;
696 ctx->authkeylen = keys.authkeylen;
697
698 return 0;
699
700 badkey:
701 crypto_aead_set_flags(authenc, CRYPTO_TFM_RES_BAD_KEY_LEN);
702 return -EINVAL;
703 }
704
705 /*
706 * talitos_edesc - s/w-extended descriptor
707 * @assoc_nents: number of segments in associated data scatterlist
708 * @src_nents: number of segments in input scatterlist
709 * @dst_nents: number of segments in output scatterlist
710 * @assoc_chained: whether assoc is chained or not
711 * @src_chained: whether src is chained or not
712 * @dst_chained: whether dst is chained or not
713 * @iv_dma: dma address of iv for checking continuity and link table
714 * @dma_len: length of dma mapped link_tbl space
715 * @dma_link_tbl: bus physical address of link_tbl
716 * @desc: h/w descriptor
717 * @link_tbl: input and output h/w link tables (if {src,dst}_nents > 1)
718 *
719 * if decrypting (with authcheck), or either one of src_nents or dst_nents
720 * is greater than 1, an integrity check value is concatenated to the end
721 * of link_tbl data
722 */
723 struct talitos_edesc {
724 int assoc_nents;
725 int src_nents;
726 int dst_nents;
727 bool assoc_chained;
728 bool src_chained;
729 bool dst_chained;
730 dma_addr_t iv_dma;
731 int dma_len;
732 dma_addr_t dma_link_tbl;
733 struct talitos_desc desc;
734 struct talitos_ptr link_tbl[0];
735 };
736
talitos_map_sg(struct device * dev,struct scatterlist * sg,unsigned int nents,enum dma_data_direction dir,bool chained)737 static int talitos_map_sg(struct device *dev, struct scatterlist *sg,
738 unsigned int nents, enum dma_data_direction dir,
739 bool chained)
740 {
741 if (unlikely(chained))
742 while (sg) {
743 dma_map_sg(dev, sg, 1, dir);
744 sg = sg_next(sg);
745 }
746 else
747 dma_map_sg(dev, sg, nents, dir);
748 return nents;
749 }
750
talitos_unmap_sg_chain(struct device * dev,struct scatterlist * sg,enum dma_data_direction dir)751 static void talitos_unmap_sg_chain(struct device *dev, struct scatterlist *sg,
752 enum dma_data_direction dir)
753 {
754 while (sg) {
755 dma_unmap_sg(dev, sg, 1, dir);
756 sg = sg_next(sg);
757 }
758 }
759
talitos_sg_unmap(struct device * dev,struct talitos_edesc * edesc,struct scatterlist * src,struct scatterlist * dst)760 static void talitos_sg_unmap(struct device *dev,
761 struct talitos_edesc *edesc,
762 struct scatterlist *src,
763 struct scatterlist *dst)
764 {
765 unsigned int src_nents = edesc->src_nents ? : 1;
766 unsigned int dst_nents = edesc->dst_nents ? : 1;
767
768 if (src != dst) {
769 if (edesc->src_chained)
770 talitos_unmap_sg_chain(dev, src, DMA_TO_DEVICE);
771 else
772 dma_unmap_sg(dev, src, src_nents, DMA_TO_DEVICE);
773
774 if (dst) {
775 if (edesc->dst_chained)
776 talitos_unmap_sg_chain(dev, dst,
777 DMA_FROM_DEVICE);
778 else
779 dma_unmap_sg(dev, dst, dst_nents,
780 DMA_FROM_DEVICE);
781 }
782 } else
783 if (edesc->src_chained)
784 talitos_unmap_sg_chain(dev, src, DMA_BIDIRECTIONAL);
785 else
786 dma_unmap_sg(dev, src, src_nents, DMA_BIDIRECTIONAL);
787 }
788
ipsec_esp_unmap(struct device * dev,struct talitos_edesc * edesc,struct aead_request * areq)789 static void ipsec_esp_unmap(struct device *dev,
790 struct talitos_edesc *edesc,
791 struct aead_request *areq)
792 {
793 unmap_single_talitos_ptr(dev, &edesc->desc.ptr[6], DMA_FROM_DEVICE);
794 unmap_single_talitos_ptr(dev, &edesc->desc.ptr[3], DMA_TO_DEVICE);
795 unmap_single_talitos_ptr(dev, &edesc->desc.ptr[2], DMA_TO_DEVICE);
796 unmap_single_talitos_ptr(dev, &edesc->desc.ptr[0], DMA_TO_DEVICE);
797
798 if (edesc->assoc_chained)
799 talitos_unmap_sg_chain(dev, areq->assoc, DMA_TO_DEVICE);
800 else if (areq->assoclen)
801 /* assoc_nents counts also for IV in non-contiguous cases */
802 dma_unmap_sg(dev, areq->assoc,
803 edesc->assoc_nents ? edesc->assoc_nents - 1 : 1,
804 DMA_TO_DEVICE);
805
806 talitos_sg_unmap(dev, edesc, areq->src, areq->dst);
807
808 if (edesc->dma_len)
809 dma_unmap_single(dev, edesc->dma_link_tbl, edesc->dma_len,
810 DMA_BIDIRECTIONAL);
811 }
812
813 /*
814 * ipsec_esp descriptor callbacks
815 */
ipsec_esp_encrypt_done(struct device * dev,struct talitos_desc * desc,void * context,int err)816 static void ipsec_esp_encrypt_done(struct device *dev,
817 struct talitos_desc *desc, void *context,
818 int err)
819 {
820 struct aead_request *areq = context;
821 struct crypto_aead *authenc = crypto_aead_reqtfm(areq);
822 struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
823 struct talitos_edesc *edesc;
824 struct scatterlist *sg;
825 void *icvdata;
826
827 edesc = container_of(desc, struct talitos_edesc, desc);
828
829 ipsec_esp_unmap(dev, edesc, areq);
830
831 /* copy the generated ICV to dst */
832 if (edesc->dst_nents) {
833 icvdata = &edesc->link_tbl[edesc->src_nents +
834 edesc->dst_nents + 2 +
835 edesc->assoc_nents];
836 sg = sg_last(areq->dst, edesc->dst_nents);
837 memcpy((char *)sg_virt(sg) + sg->length - ctx->authsize,
838 icvdata, ctx->authsize);
839 }
840
841 kfree(edesc);
842
843 aead_request_complete(areq, err);
844 }
845
ipsec_esp_decrypt_swauth_done(struct device * dev,struct talitos_desc * desc,void * context,int err)846 static void ipsec_esp_decrypt_swauth_done(struct device *dev,
847 struct talitos_desc *desc,
848 void *context, int err)
849 {
850 struct aead_request *req = context;
851 struct crypto_aead *authenc = crypto_aead_reqtfm(req);
852 struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
853 struct talitos_edesc *edesc;
854 struct scatterlist *sg;
855 void *icvdata;
856
857 edesc = container_of(desc, struct talitos_edesc, desc);
858
859 ipsec_esp_unmap(dev, edesc, req);
860
861 if (!err) {
862 /* auth check */
863 if (edesc->dma_len)
864 icvdata = &edesc->link_tbl[edesc->src_nents +
865 edesc->dst_nents + 2 +
866 edesc->assoc_nents];
867 else
868 icvdata = &edesc->link_tbl[0];
869
870 sg = sg_last(req->dst, edesc->dst_nents ? : 1);
871 err = memcmp(icvdata, (char *)sg_virt(sg) + sg->length -
872 ctx->authsize, ctx->authsize) ? -EBADMSG : 0;
873 }
874
875 kfree(edesc);
876
877 aead_request_complete(req, err);
878 }
879
ipsec_esp_decrypt_hwauth_done(struct device * dev,struct talitos_desc * desc,void * context,int err)880 static void ipsec_esp_decrypt_hwauth_done(struct device *dev,
881 struct talitos_desc *desc,
882 void *context, int err)
883 {
884 struct aead_request *req = context;
885 struct talitos_edesc *edesc;
886
887 edesc = container_of(desc, struct talitos_edesc, desc);
888
889 ipsec_esp_unmap(dev, edesc, req);
890
891 /* check ICV auth status */
892 if (!err && ((desc->hdr_lo & DESC_HDR_LO_ICCR1_MASK) !=
893 DESC_HDR_LO_ICCR1_PASS))
894 err = -EBADMSG;
895
896 kfree(edesc);
897
898 aead_request_complete(req, err);
899 }
900
901 /*
902 * convert scatterlist to SEC h/w link table format
903 * stop at cryptlen bytes
904 */
sg_to_link_tbl(struct scatterlist * sg,int sg_count,int cryptlen,struct talitos_ptr * link_tbl_ptr)905 static int sg_to_link_tbl(struct scatterlist *sg, int sg_count,
906 int cryptlen, struct talitos_ptr *link_tbl_ptr)
907 {
908 int n_sg = sg_count;
909
910 while (n_sg--) {
911 to_talitos_ptr(link_tbl_ptr, sg_dma_address(sg));
912 link_tbl_ptr->len = cpu_to_be16(sg_dma_len(sg));
913 link_tbl_ptr->j_extent = 0;
914 link_tbl_ptr++;
915 cryptlen -= sg_dma_len(sg);
916 sg = sg_next(sg);
917 }
918
919 /* adjust (decrease) last one (or two) entry's len to cryptlen */
920 link_tbl_ptr--;
921 while (be16_to_cpu(link_tbl_ptr->len) <= (-cryptlen)) {
922 /* Empty this entry, and move to previous one */
923 cryptlen += be16_to_cpu(link_tbl_ptr->len);
924 link_tbl_ptr->len = 0;
925 sg_count--;
926 link_tbl_ptr--;
927 }
928 link_tbl_ptr->len = cpu_to_be16(be16_to_cpu(link_tbl_ptr->len)
929 + cryptlen);
930
931 /* tag end of link table */
932 link_tbl_ptr->j_extent = DESC_PTR_LNKTBL_RETURN;
933
934 return sg_count;
935 }
936
937 /*
938 * fill in and submit ipsec_esp descriptor
939 */
ipsec_esp(struct talitos_edesc * edesc,struct aead_request * areq,u64 seq,void (* callback)(struct device * dev,struct talitos_desc * desc,void * context,int error))940 static int ipsec_esp(struct talitos_edesc *edesc, struct aead_request *areq,
941 u64 seq, void (*callback) (struct device *dev,
942 struct talitos_desc *desc,
943 void *context, int error))
944 {
945 struct crypto_aead *aead = crypto_aead_reqtfm(areq);
946 struct talitos_ctx *ctx = crypto_aead_ctx(aead);
947 struct device *dev = ctx->dev;
948 struct talitos_desc *desc = &edesc->desc;
949 unsigned int cryptlen = areq->cryptlen;
950 unsigned int authsize = ctx->authsize;
951 unsigned int ivsize = crypto_aead_ivsize(aead);
952 int sg_count, ret;
953 int sg_link_tbl_len;
954
955 /* hmac key */
956 map_single_talitos_ptr(dev, &desc->ptr[0], ctx->authkeylen, &ctx->key,
957 0, DMA_TO_DEVICE);
958
959 /* hmac data */
960 desc->ptr[1].len = cpu_to_be16(areq->assoclen + ivsize);
961 if (edesc->assoc_nents) {
962 int tbl_off = edesc->src_nents + edesc->dst_nents + 2;
963 struct talitos_ptr *tbl_ptr = &edesc->link_tbl[tbl_off];
964
965 to_talitos_ptr(&desc->ptr[1], edesc->dma_link_tbl + tbl_off *
966 sizeof(struct talitos_ptr));
967 desc->ptr[1].j_extent = DESC_PTR_LNKTBL_JUMP;
968
969 /* assoc_nents - 1 entries for assoc, 1 for IV */
970 sg_count = sg_to_link_tbl(areq->assoc, edesc->assoc_nents - 1,
971 areq->assoclen, tbl_ptr);
972
973 /* add IV to link table */
974 tbl_ptr += sg_count - 1;
975 tbl_ptr->j_extent = 0;
976 tbl_ptr++;
977 to_talitos_ptr(tbl_ptr, edesc->iv_dma);
978 tbl_ptr->len = cpu_to_be16(ivsize);
979 tbl_ptr->j_extent = DESC_PTR_LNKTBL_RETURN;
980
981 dma_sync_single_for_device(dev, edesc->dma_link_tbl,
982 edesc->dma_len, DMA_BIDIRECTIONAL);
983 } else {
984 if (areq->assoclen)
985 to_talitos_ptr(&desc->ptr[1],
986 sg_dma_address(areq->assoc));
987 else
988 to_talitos_ptr(&desc->ptr[1], edesc->iv_dma);
989 desc->ptr[1].j_extent = 0;
990 }
991
992 /* cipher iv */
993 to_talitos_ptr(&desc->ptr[2], edesc->iv_dma);
994 desc->ptr[2].len = cpu_to_be16(ivsize);
995 desc->ptr[2].j_extent = 0;
996 /* Sync needed for the aead_givencrypt case */
997 dma_sync_single_for_device(dev, edesc->iv_dma, ivsize, DMA_TO_DEVICE);
998
999 /* cipher key */
1000 map_single_talitos_ptr(dev, &desc->ptr[3], ctx->enckeylen,
1001 (char *)&ctx->key + ctx->authkeylen, 0,
1002 DMA_TO_DEVICE);
1003
1004 /*
1005 * cipher in
1006 * map and adjust cipher len to aead request cryptlen.
1007 * extent is bytes of HMAC postpended to ciphertext,
1008 * typically 12 for ipsec
1009 */
1010 desc->ptr[4].len = cpu_to_be16(cryptlen);
1011 desc->ptr[4].j_extent = authsize;
1012
1013 sg_count = talitos_map_sg(dev, areq->src, edesc->src_nents ? : 1,
1014 (areq->src == areq->dst) ? DMA_BIDIRECTIONAL
1015 : DMA_TO_DEVICE,
1016 edesc->src_chained);
1017
1018 if (sg_count == 1) {
1019 to_talitos_ptr(&desc->ptr[4], sg_dma_address(areq->src));
1020 } else {
1021 sg_link_tbl_len = cryptlen;
1022
1023 if (edesc->desc.hdr & DESC_HDR_MODE1_MDEU_CICV)
1024 sg_link_tbl_len = cryptlen + authsize;
1025
1026 sg_count = sg_to_link_tbl(areq->src, sg_count, sg_link_tbl_len,
1027 &edesc->link_tbl[0]);
1028 if (sg_count > 1) {
1029 desc->ptr[4].j_extent |= DESC_PTR_LNKTBL_JUMP;
1030 to_talitos_ptr(&desc->ptr[4], edesc->dma_link_tbl);
1031 dma_sync_single_for_device(dev, edesc->dma_link_tbl,
1032 edesc->dma_len,
1033 DMA_BIDIRECTIONAL);
1034 } else {
1035 /* Only one segment now, so no link tbl needed */
1036 to_talitos_ptr(&desc->ptr[4],
1037 sg_dma_address(areq->src));
1038 }
1039 }
1040
1041 /* cipher out */
1042 desc->ptr[5].len = cpu_to_be16(cryptlen);
1043 desc->ptr[5].j_extent = authsize;
1044
1045 if (areq->src != areq->dst)
1046 sg_count = talitos_map_sg(dev, areq->dst,
1047 edesc->dst_nents ? : 1,
1048 DMA_FROM_DEVICE, edesc->dst_chained);
1049
1050 if (sg_count == 1) {
1051 to_talitos_ptr(&desc->ptr[5], sg_dma_address(areq->dst));
1052 } else {
1053 int tbl_off = edesc->src_nents + 1;
1054 struct talitos_ptr *tbl_ptr = &edesc->link_tbl[tbl_off];
1055
1056 to_talitos_ptr(&desc->ptr[5], edesc->dma_link_tbl +
1057 tbl_off * sizeof(struct talitos_ptr));
1058 sg_count = sg_to_link_tbl(areq->dst, sg_count, cryptlen,
1059 tbl_ptr);
1060
1061 /* Add an entry to the link table for ICV data */
1062 tbl_ptr += sg_count - 1;
1063 tbl_ptr->j_extent = 0;
1064 tbl_ptr++;
1065 tbl_ptr->j_extent = DESC_PTR_LNKTBL_RETURN;
1066 tbl_ptr->len = cpu_to_be16(authsize);
1067
1068 /* icv data follows link tables */
1069 to_talitos_ptr(tbl_ptr, edesc->dma_link_tbl +
1070 (tbl_off + edesc->dst_nents + 1 +
1071 edesc->assoc_nents) *
1072 sizeof(struct talitos_ptr));
1073 desc->ptr[5].j_extent |= DESC_PTR_LNKTBL_JUMP;
1074 dma_sync_single_for_device(ctx->dev, edesc->dma_link_tbl,
1075 edesc->dma_len, DMA_BIDIRECTIONAL);
1076 }
1077
1078 /* iv out */
1079 map_single_talitos_ptr(dev, &desc->ptr[6], ivsize, ctx->iv, 0,
1080 DMA_FROM_DEVICE);
1081
1082 ret = talitos_submit(dev, ctx->ch, desc, callback, areq);
1083 if (ret != -EINPROGRESS) {
1084 ipsec_esp_unmap(dev, edesc, areq);
1085 kfree(edesc);
1086 }
1087 return ret;
1088 }
1089
1090 /*
1091 * derive number of elements in scatterlist
1092 */
sg_count(struct scatterlist * sg_list,int nbytes,bool * chained)1093 static int sg_count(struct scatterlist *sg_list, int nbytes, bool *chained)
1094 {
1095 struct scatterlist *sg = sg_list;
1096 int sg_nents = 0;
1097
1098 *chained = false;
1099 while (nbytes > 0) {
1100 sg_nents++;
1101 nbytes -= sg->length;
1102 if (!sg_is_last(sg) && (sg + 1)->length == 0)
1103 *chained = true;
1104 sg = sg_next(sg);
1105 }
1106
1107 return sg_nents;
1108 }
1109
1110 /*
1111 * allocate and map the extended descriptor
1112 */
talitos_edesc_alloc(struct device * dev,struct scatterlist * assoc,struct scatterlist * src,struct scatterlist * dst,u8 * iv,unsigned int assoclen,unsigned int cryptlen,unsigned int authsize,unsigned int ivsize,int icv_stashing,u32 cryptoflags,bool encrypt)1113 static struct talitos_edesc *talitos_edesc_alloc(struct device *dev,
1114 struct scatterlist *assoc,
1115 struct scatterlist *src,
1116 struct scatterlist *dst,
1117 u8 *iv,
1118 unsigned int assoclen,
1119 unsigned int cryptlen,
1120 unsigned int authsize,
1121 unsigned int ivsize,
1122 int icv_stashing,
1123 u32 cryptoflags,
1124 bool encrypt)
1125 {
1126 struct talitos_edesc *edesc;
1127 int assoc_nents = 0, src_nents, dst_nents, alloc_len, dma_len;
1128 bool assoc_chained = false, src_chained = false, dst_chained = false;
1129 dma_addr_t iv_dma = 0;
1130 gfp_t flags = cryptoflags & CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL :
1131 GFP_ATOMIC;
1132
1133 if (cryptlen + authsize > TALITOS_MAX_DATA_LEN) {
1134 dev_err(dev, "length exceeds h/w max limit\n");
1135 return ERR_PTR(-EINVAL);
1136 }
1137
1138 if (ivsize)
1139 iv_dma = dma_map_single(dev, iv, ivsize, DMA_TO_DEVICE);
1140
1141 if (assoclen) {
1142 /*
1143 * Currently it is assumed that iv is provided whenever assoc
1144 * is.
1145 */
1146 BUG_ON(!iv);
1147
1148 assoc_nents = sg_count(assoc, assoclen, &assoc_chained);
1149 talitos_map_sg(dev, assoc, assoc_nents, DMA_TO_DEVICE,
1150 assoc_chained);
1151 assoc_nents = (assoc_nents == 1) ? 0 : assoc_nents;
1152
1153 if (assoc_nents || sg_dma_address(assoc) + assoclen != iv_dma)
1154 assoc_nents = assoc_nents ? assoc_nents + 1 : 2;
1155 }
1156
1157 if (!dst || dst == src) {
1158 src_nents = sg_count(src, cryptlen + authsize, &src_chained);
1159 src_nents = (src_nents == 1) ? 0 : src_nents;
1160 dst_nents = dst ? src_nents : 0;
1161 } else { /* dst && dst != src*/
1162 src_nents = sg_count(src, cryptlen + (encrypt ? 0 : authsize),
1163 &src_chained);
1164 src_nents = (src_nents == 1) ? 0 : src_nents;
1165 dst_nents = sg_count(dst, cryptlen + (encrypt ? authsize : 0),
1166 &dst_chained);
1167 dst_nents = (dst_nents == 1) ? 0 : dst_nents;
1168 }
1169
1170 /*
1171 * allocate space for base edesc plus the link tables,
1172 * allowing for two separate entries for ICV and generated ICV (+ 2),
1173 * and the ICV data itself
1174 */
1175 alloc_len = sizeof(struct talitos_edesc);
1176 if (assoc_nents || src_nents || dst_nents) {
1177 dma_len = (src_nents + dst_nents + 2 + assoc_nents) *
1178 sizeof(struct talitos_ptr) + authsize;
1179 alloc_len += dma_len;
1180 } else {
1181 dma_len = 0;
1182 alloc_len += icv_stashing ? authsize : 0;
1183 }
1184
1185 edesc = kmalloc(alloc_len, GFP_DMA | flags);
1186 if (!edesc) {
1187 if (assoc_chained)
1188 talitos_unmap_sg_chain(dev, assoc, DMA_TO_DEVICE);
1189 else if (assoclen)
1190 dma_unmap_sg(dev, assoc,
1191 assoc_nents ? assoc_nents - 1 : 1,
1192 DMA_TO_DEVICE);
1193
1194 if (iv_dma)
1195 dma_unmap_single(dev, iv_dma, ivsize, DMA_TO_DEVICE);
1196
1197 dev_err(dev, "could not allocate edescriptor\n");
1198 return ERR_PTR(-ENOMEM);
1199 }
1200
1201 edesc->assoc_nents = assoc_nents;
1202 edesc->src_nents = src_nents;
1203 edesc->dst_nents = dst_nents;
1204 edesc->assoc_chained = assoc_chained;
1205 edesc->src_chained = src_chained;
1206 edesc->dst_chained = dst_chained;
1207 edesc->iv_dma = iv_dma;
1208 edesc->dma_len = dma_len;
1209 if (dma_len)
1210 edesc->dma_link_tbl = dma_map_single(dev, &edesc->link_tbl[0],
1211 edesc->dma_len,
1212 DMA_BIDIRECTIONAL);
1213
1214 return edesc;
1215 }
1216
aead_edesc_alloc(struct aead_request * areq,u8 * iv,int icv_stashing,bool encrypt)1217 static struct talitos_edesc *aead_edesc_alloc(struct aead_request *areq, u8 *iv,
1218 int icv_stashing, bool encrypt)
1219 {
1220 struct crypto_aead *authenc = crypto_aead_reqtfm(areq);
1221 struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
1222 unsigned int ivsize = crypto_aead_ivsize(authenc);
1223
1224 return talitos_edesc_alloc(ctx->dev, areq->assoc, areq->src, areq->dst,
1225 iv, areq->assoclen, areq->cryptlen,
1226 ctx->authsize, ivsize, icv_stashing,
1227 areq->base.flags, encrypt);
1228 }
1229
aead_encrypt(struct aead_request * req)1230 static int aead_encrypt(struct aead_request *req)
1231 {
1232 struct crypto_aead *authenc = crypto_aead_reqtfm(req);
1233 struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
1234 struct talitos_edesc *edesc;
1235
1236 /* allocate extended descriptor */
1237 edesc = aead_edesc_alloc(req, req->iv, 0, true);
1238 if (IS_ERR(edesc))
1239 return PTR_ERR(edesc);
1240
1241 /* set encrypt */
1242 edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT;
1243
1244 return ipsec_esp(edesc, req, 0, ipsec_esp_encrypt_done);
1245 }
1246
aead_decrypt(struct aead_request * req)1247 static int aead_decrypt(struct aead_request *req)
1248 {
1249 struct crypto_aead *authenc = crypto_aead_reqtfm(req);
1250 struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
1251 unsigned int authsize = ctx->authsize;
1252 struct talitos_private *priv = dev_get_drvdata(ctx->dev);
1253 struct talitos_edesc *edesc;
1254 struct scatterlist *sg;
1255 void *icvdata;
1256
1257 req->cryptlen -= authsize;
1258
1259 /* allocate extended descriptor */
1260 edesc = aead_edesc_alloc(req, req->iv, 1, false);
1261 if (IS_ERR(edesc))
1262 return PTR_ERR(edesc);
1263
1264 if ((priv->features & TALITOS_FTR_HW_AUTH_CHECK) &&
1265 ((!edesc->src_nents && !edesc->dst_nents) ||
1266 priv->features & TALITOS_FTR_SRC_LINK_TBL_LEN_INCLUDES_EXTENT)) {
1267
1268 /* decrypt and check the ICV */
1269 edesc->desc.hdr = ctx->desc_hdr_template |
1270 DESC_HDR_DIR_INBOUND |
1271 DESC_HDR_MODE1_MDEU_CICV;
1272
1273 /* reset integrity check result bits */
1274 edesc->desc.hdr_lo = 0;
1275
1276 return ipsec_esp(edesc, req, 0, ipsec_esp_decrypt_hwauth_done);
1277 }
1278
1279 /* Have to check the ICV with software */
1280 edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_DIR_INBOUND;
1281
1282 /* stash incoming ICV for later cmp with ICV generated by the h/w */
1283 if (edesc->dma_len)
1284 icvdata = &edesc->link_tbl[edesc->src_nents +
1285 edesc->dst_nents + 2 +
1286 edesc->assoc_nents];
1287 else
1288 icvdata = &edesc->link_tbl[0];
1289
1290 sg = sg_last(req->src, edesc->src_nents ? : 1);
1291
1292 memcpy(icvdata, (char *)sg_virt(sg) + sg->length - ctx->authsize,
1293 ctx->authsize);
1294
1295 return ipsec_esp(edesc, req, 0, ipsec_esp_decrypt_swauth_done);
1296 }
1297
aead_givencrypt(struct aead_givcrypt_request * req)1298 static int aead_givencrypt(struct aead_givcrypt_request *req)
1299 {
1300 struct aead_request *areq = &req->areq;
1301 struct crypto_aead *authenc = crypto_aead_reqtfm(areq);
1302 struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
1303 struct talitos_edesc *edesc;
1304
1305 /* allocate extended descriptor */
1306 edesc = aead_edesc_alloc(areq, req->giv, 0, true);
1307 if (IS_ERR(edesc))
1308 return PTR_ERR(edesc);
1309
1310 /* set encrypt */
1311 edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT;
1312
1313 memcpy(req->giv, ctx->iv, crypto_aead_ivsize(authenc));
1314 /* avoid consecutive packets going out with same IV */
1315 *(__be64 *)req->giv ^= cpu_to_be64(req->seq);
1316
1317 return ipsec_esp(edesc, areq, req->seq, ipsec_esp_encrypt_done);
1318 }
1319
ablkcipher_setkey(struct crypto_ablkcipher * cipher,const u8 * key,unsigned int keylen)1320 static int ablkcipher_setkey(struct crypto_ablkcipher *cipher,
1321 const u8 *key, unsigned int keylen)
1322 {
1323 struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher);
1324
1325 memcpy(&ctx->key, key, keylen);
1326 ctx->keylen = keylen;
1327
1328 return 0;
1329 }
1330
common_nonsnoop_unmap(struct device * dev,struct talitos_edesc * edesc,struct ablkcipher_request * areq)1331 static void common_nonsnoop_unmap(struct device *dev,
1332 struct talitos_edesc *edesc,
1333 struct ablkcipher_request *areq)
1334 {
1335 unmap_single_talitos_ptr(dev, &edesc->desc.ptr[5], DMA_FROM_DEVICE);
1336 unmap_single_talitos_ptr(dev, &edesc->desc.ptr[2], DMA_TO_DEVICE);
1337 unmap_single_talitos_ptr(dev, &edesc->desc.ptr[1], DMA_TO_DEVICE);
1338
1339 talitos_sg_unmap(dev, edesc, areq->src, areq->dst);
1340
1341 if (edesc->dma_len)
1342 dma_unmap_single(dev, edesc->dma_link_tbl, edesc->dma_len,
1343 DMA_BIDIRECTIONAL);
1344 }
1345
ablkcipher_done(struct device * dev,struct talitos_desc * desc,void * context,int err)1346 static void ablkcipher_done(struct device *dev,
1347 struct talitos_desc *desc, void *context,
1348 int err)
1349 {
1350 struct ablkcipher_request *areq = context;
1351 struct talitos_edesc *edesc;
1352
1353 edesc = container_of(desc, struct talitos_edesc, desc);
1354
1355 common_nonsnoop_unmap(dev, edesc, areq);
1356
1357 kfree(edesc);
1358
1359 areq->base.complete(&areq->base, err);
1360 }
1361
common_nonsnoop(struct talitos_edesc * edesc,struct ablkcipher_request * areq,void (* callback)(struct device * dev,struct talitos_desc * desc,void * context,int error))1362 static int common_nonsnoop(struct talitos_edesc *edesc,
1363 struct ablkcipher_request *areq,
1364 void (*callback) (struct device *dev,
1365 struct talitos_desc *desc,
1366 void *context, int error))
1367 {
1368 struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq);
1369 struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher);
1370 struct device *dev = ctx->dev;
1371 struct talitos_desc *desc = &edesc->desc;
1372 unsigned int cryptlen = areq->nbytes;
1373 unsigned int ivsize = crypto_ablkcipher_ivsize(cipher);
1374 int sg_count, ret;
1375
1376 /* first DWORD empty */
1377 desc->ptr[0].len = 0;
1378 to_talitos_ptr(&desc->ptr[0], 0);
1379 desc->ptr[0].j_extent = 0;
1380
1381 /* cipher iv */
1382 to_talitos_ptr(&desc->ptr[1], edesc->iv_dma);
1383 desc->ptr[1].len = cpu_to_be16(ivsize);
1384 desc->ptr[1].j_extent = 0;
1385
1386 /* cipher key */
1387 map_single_talitos_ptr(dev, &desc->ptr[2], ctx->keylen,
1388 (char *)&ctx->key, 0, DMA_TO_DEVICE);
1389
1390 /*
1391 * cipher in
1392 */
1393 desc->ptr[3].len = cpu_to_be16(cryptlen);
1394 desc->ptr[3].j_extent = 0;
1395
1396 sg_count = talitos_map_sg(dev, areq->src, edesc->src_nents ? : 1,
1397 (areq->src == areq->dst) ? DMA_BIDIRECTIONAL
1398 : DMA_TO_DEVICE,
1399 edesc->src_chained);
1400
1401 if (sg_count == 1) {
1402 to_talitos_ptr(&desc->ptr[3], sg_dma_address(areq->src));
1403 } else {
1404 sg_count = sg_to_link_tbl(areq->src, sg_count, cryptlen,
1405 &edesc->link_tbl[0]);
1406 if (sg_count > 1) {
1407 to_talitos_ptr(&desc->ptr[3], edesc->dma_link_tbl);
1408 desc->ptr[3].j_extent |= DESC_PTR_LNKTBL_JUMP;
1409 dma_sync_single_for_device(dev, edesc->dma_link_tbl,
1410 edesc->dma_len,
1411 DMA_BIDIRECTIONAL);
1412 } else {
1413 /* Only one segment now, so no link tbl needed */
1414 to_talitos_ptr(&desc->ptr[3],
1415 sg_dma_address(areq->src));
1416 }
1417 }
1418
1419 /* cipher out */
1420 desc->ptr[4].len = cpu_to_be16(cryptlen);
1421 desc->ptr[4].j_extent = 0;
1422
1423 if (areq->src != areq->dst)
1424 sg_count = talitos_map_sg(dev, areq->dst,
1425 edesc->dst_nents ? : 1,
1426 DMA_FROM_DEVICE, edesc->dst_chained);
1427
1428 if (sg_count == 1) {
1429 to_talitos_ptr(&desc->ptr[4], sg_dma_address(areq->dst));
1430 } else {
1431 struct talitos_ptr *link_tbl_ptr =
1432 &edesc->link_tbl[edesc->src_nents + 1];
1433
1434 to_talitos_ptr(&desc->ptr[4], edesc->dma_link_tbl +
1435 (edesc->src_nents + 1) *
1436 sizeof(struct talitos_ptr));
1437 desc->ptr[4].j_extent |= DESC_PTR_LNKTBL_JUMP;
1438 sg_count = sg_to_link_tbl(areq->dst, sg_count, cryptlen,
1439 link_tbl_ptr);
1440 dma_sync_single_for_device(ctx->dev, edesc->dma_link_tbl,
1441 edesc->dma_len, DMA_BIDIRECTIONAL);
1442 }
1443
1444 /* iv out */
1445 map_single_talitos_ptr(dev, &desc->ptr[5], ivsize, ctx->iv, 0,
1446 DMA_FROM_DEVICE);
1447
1448 /* last DWORD empty */
1449 desc->ptr[6].len = 0;
1450 to_talitos_ptr(&desc->ptr[6], 0);
1451 desc->ptr[6].j_extent = 0;
1452
1453 ret = talitos_submit(dev, ctx->ch, desc, callback, areq);
1454 if (ret != -EINPROGRESS) {
1455 common_nonsnoop_unmap(dev, edesc, areq);
1456 kfree(edesc);
1457 }
1458 return ret;
1459 }
1460
ablkcipher_edesc_alloc(struct ablkcipher_request * areq,bool encrypt)1461 static struct talitos_edesc *ablkcipher_edesc_alloc(struct ablkcipher_request *
1462 areq, bool encrypt)
1463 {
1464 struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq);
1465 struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher);
1466 unsigned int ivsize = crypto_ablkcipher_ivsize(cipher);
1467
1468 return talitos_edesc_alloc(ctx->dev, NULL, areq->src, areq->dst,
1469 areq->info, 0, areq->nbytes, 0, ivsize, 0,
1470 areq->base.flags, encrypt);
1471 }
1472
ablkcipher_encrypt(struct ablkcipher_request * areq)1473 static int ablkcipher_encrypt(struct ablkcipher_request *areq)
1474 {
1475 struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq);
1476 struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher);
1477 struct talitos_edesc *edesc;
1478
1479 /* allocate extended descriptor */
1480 edesc = ablkcipher_edesc_alloc(areq, true);
1481 if (IS_ERR(edesc))
1482 return PTR_ERR(edesc);
1483
1484 /* set encrypt */
1485 edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT;
1486
1487 return common_nonsnoop(edesc, areq, ablkcipher_done);
1488 }
1489
ablkcipher_decrypt(struct ablkcipher_request * areq)1490 static int ablkcipher_decrypt(struct ablkcipher_request *areq)
1491 {
1492 struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq);
1493 struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher);
1494 struct talitos_edesc *edesc;
1495
1496 /* allocate extended descriptor */
1497 edesc = ablkcipher_edesc_alloc(areq, false);
1498 if (IS_ERR(edesc))
1499 return PTR_ERR(edesc);
1500
1501 edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_DIR_INBOUND;
1502
1503 return common_nonsnoop(edesc, areq, ablkcipher_done);
1504 }
1505
common_nonsnoop_hash_unmap(struct device * dev,struct talitos_edesc * edesc,struct ahash_request * areq)1506 static void common_nonsnoop_hash_unmap(struct device *dev,
1507 struct talitos_edesc *edesc,
1508 struct ahash_request *areq)
1509 {
1510 struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1511
1512 unmap_single_talitos_ptr(dev, &edesc->desc.ptr[5], DMA_FROM_DEVICE);
1513
1514 /* When using hashctx-in, must unmap it. */
1515 if (edesc->desc.ptr[1].len)
1516 unmap_single_talitos_ptr(dev, &edesc->desc.ptr[1],
1517 DMA_TO_DEVICE);
1518
1519 if (edesc->desc.ptr[2].len)
1520 unmap_single_talitos_ptr(dev, &edesc->desc.ptr[2],
1521 DMA_TO_DEVICE);
1522
1523 talitos_sg_unmap(dev, edesc, req_ctx->psrc, NULL);
1524
1525 if (edesc->dma_len)
1526 dma_unmap_single(dev, edesc->dma_link_tbl, edesc->dma_len,
1527 DMA_BIDIRECTIONAL);
1528
1529 }
1530
ahash_done(struct device * dev,struct talitos_desc * desc,void * context,int err)1531 static void ahash_done(struct device *dev,
1532 struct talitos_desc *desc, void *context,
1533 int err)
1534 {
1535 struct ahash_request *areq = context;
1536 struct talitos_edesc *edesc =
1537 container_of(desc, struct talitos_edesc, desc);
1538 struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1539
1540 if (!req_ctx->last && req_ctx->to_hash_later) {
1541 /* Position any partial block for next update/final/finup */
1542 memcpy(req_ctx->buf, req_ctx->bufnext, req_ctx->to_hash_later);
1543 req_ctx->nbuf = req_ctx->to_hash_later;
1544 }
1545 common_nonsnoop_hash_unmap(dev, edesc, areq);
1546
1547 kfree(edesc);
1548
1549 areq->base.complete(&areq->base, err);
1550 }
1551
common_nonsnoop_hash(struct talitos_edesc * edesc,struct ahash_request * areq,unsigned int length,void (* callback)(struct device * dev,struct talitos_desc * desc,void * context,int error))1552 static int common_nonsnoop_hash(struct talitos_edesc *edesc,
1553 struct ahash_request *areq, unsigned int length,
1554 void (*callback) (struct device *dev,
1555 struct talitos_desc *desc,
1556 void *context, int error))
1557 {
1558 struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
1559 struct talitos_ctx *ctx = crypto_ahash_ctx(tfm);
1560 struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1561 struct device *dev = ctx->dev;
1562 struct talitos_desc *desc = &edesc->desc;
1563 int sg_count, ret;
1564
1565 /* first DWORD empty */
1566 desc->ptr[0] = zero_entry;
1567
1568 /* hash context in */
1569 if (!req_ctx->first || req_ctx->swinit) {
1570 map_single_talitos_ptr(dev, &desc->ptr[1],
1571 req_ctx->hw_context_size,
1572 (char *)req_ctx->hw_context, 0,
1573 DMA_TO_DEVICE);
1574 req_ctx->swinit = 0;
1575 } else {
1576 desc->ptr[1] = zero_entry;
1577 /* Indicate next op is not the first. */
1578 req_ctx->first = 0;
1579 }
1580
1581 /* HMAC key */
1582 if (ctx->keylen)
1583 map_single_talitos_ptr(dev, &desc->ptr[2], ctx->keylen,
1584 (char *)&ctx->key, 0, DMA_TO_DEVICE);
1585 else
1586 desc->ptr[2] = zero_entry;
1587
1588 /*
1589 * data in
1590 */
1591 desc->ptr[3].len = cpu_to_be16(length);
1592 desc->ptr[3].j_extent = 0;
1593
1594 sg_count = talitos_map_sg(dev, req_ctx->psrc,
1595 edesc->src_nents ? : 1,
1596 DMA_TO_DEVICE, edesc->src_chained);
1597
1598 if (sg_count == 1) {
1599 to_talitos_ptr(&desc->ptr[3], sg_dma_address(req_ctx->psrc));
1600 } else {
1601 sg_count = sg_to_link_tbl(req_ctx->psrc, sg_count, length,
1602 &edesc->link_tbl[0]);
1603 if (sg_count > 1) {
1604 desc->ptr[3].j_extent |= DESC_PTR_LNKTBL_JUMP;
1605 to_talitos_ptr(&desc->ptr[3], edesc->dma_link_tbl);
1606 dma_sync_single_for_device(ctx->dev,
1607 edesc->dma_link_tbl,
1608 edesc->dma_len,
1609 DMA_BIDIRECTIONAL);
1610 } else {
1611 /* Only one segment now, so no link tbl needed */
1612 to_talitos_ptr(&desc->ptr[3],
1613 sg_dma_address(req_ctx->psrc));
1614 }
1615 }
1616
1617 /* fifth DWORD empty */
1618 desc->ptr[4] = zero_entry;
1619
1620 /* hash/HMAC out -or- hash context out */
1621 if (req_ctx->last)
1622 map_single_talitos_ptr(dev, &desc->ptr[5],
1623 crypto_ahash_digestsize(tfm),
1624 areq->result, 0, DMA_FROM_DEVICE);
1625 else
1626 map_single_talitos_ptr(dev, &desc->ptr[5],
1627 req_ctx->hw_context_size,
1628 req_ctx->hw_context, 0, DMA_FROM_DEVICE);
1629
1630 /* last DWORD empty */
1631 desc->ptr[6] = zero_entry;
1632
1633 ret = talitos_submit(dev, ctx->ch, desc, callback, areq);
1634 if (ret != -EINPROGRESS) {
1635 common_nonsnoop_hash_unmap(dev, edesc, areq);
1636 kfree(edesc);
1637 }
1638 return ret;
1639 }
1640
ahash_edesc_alloc(struct ahash_request * areq,unsigned int nbytes)1641 static struct talitos_edesc *ahash_edesc_alloc(struct ahash_request *areq,
1642 unsigned int nbytes)
1643 {
1644 struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
1645 struct talitos_ctx *ctx = crypto_ahash_ctx(tfm);
1646 struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1647
1648 return talitos_edesc_alloc(ctx->dev, NULL, req_ctx->psrc, NULL, NULL, 0,
1649 nbytes, 0, 0, 0, areq->base.flags, false);
1650 }
1651
ahash_init(struct ahash_request * areq)1652 static int ahash_init(struct ahash_request *areq)
1653 {
1654 struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
1655 struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1656
1657 /* Initialize the context */
1658 req_ctx->nbuf = 0;
1659 req_ctx->first = 1; /* first indicates h/w must init its context */
1660 req_ctx->swinit = 0; /* assume h/w init of context */
1661 req_ctx->hw_context_size =
1662 (crypto_ahash_digestsize(tfm) <= SHA256_DIGEST_SIZE)
1663 ? TALITOS_MDEU_CONTEXT_SIZE_MD5_SHA1_SHA256
1664 : TALITOS_MDEU_CONTEXT_SIZE_SHA384_SHA512;
1665
1666 return 0;
1667 }
1668
1669 /*
1670 * on h/w without explicit sha224 support, we initialize h/w context
1671 * manually with sha224 constants, and tell it to run sha256.
1672 */
ahash_init_sha224_swinit(struct ahash_request * areq)1673 static int ahash_init_sha224_swinit(struct ahash_request *areq)
1674 {
1675 struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1676
1677 ahash_init(areq);
1678 req_ctx->swinit = 1;/* prevent h/w initting context with sha256 values*/
1679
1680 req_ctx->hw_context[0] = SHA224_H0;
1681 req_ctx->hw_context[1] = SHA224_H1;
1682 req_ctx->hw_context[2] = SHA224_H2;
1683 req_ctx->hw_context[3] = SHA224_H3;
1684 req_ctx->hw_context[4] = SHA224_H4;
1685 req_ctx->hw_context[5] = SHA224_H5;
1686 req_ctx->hw_context[6] = SHA224_H6;
1687 req_ctx->hw_context[7] = SHA224_H7;
1688
1689 /* init 64-bit count */
1690 req_ctx->hw_context[8] = 0;
1691 req_ctx->hw_context[9] = 0;
1692
1693 return 0;
1694 }
1695
ahash_process_req(struct ahash_request * areq,unsigned int nbytes)1696 static int ahash_process_req(struct ahash_request *areq, unsigned int nbytes)
1697 {
1698 struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
1699 struct talitos_ctx *ctx = crypto_ahash_ctx(tfm);
1700 struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1701 struct talitos_edesc *edesc;
1702 unsigned int blocksize =
1703 crypto_tfm_alg_blocksize(crypto_ahash_tfm(tfm));
1704 unsigned int nbytes_to_hash;
1705 unsigned int to_hash_later;
1706 unsigned int nsg;
1707 bool chained;
1708
1709 if (!req_ctx->last && (nbytes + req_ctx->nbuf <= blocksize)) {
1710 /* Buffer up to one whole block */
1711 sg_copy_to_buffer(areq->src,
1712 sg_count(areq->src, nbytes, &chained),
1713 req_ctx->buf + req_ctx->nbuf, nbytes);
1714 req_ctx->nbuf += nbytes;
1715 return 0;
1716 }
1717
1718 /* At least (blocksize + 1) bytes are available to hash */
1719 nbytes_to_hash = nbytes + req_ctx->nbuf;
1720 to_hash_later = nbytes_to_hash & (blocksize - 1);
1721
1722 if (req_ctx->last)
1723 to_hash_later = 0;
1724 else if (to_hash_later)
1725 /* There is a partial block. Hash the full block(s) now */
1726 nbytes_to_hash -= to_hash_later;
1727 else {
1728 /* Keep one block buffered */
1729 nbytes_to_hash -= blocksize;
1730 to_hash_later = blocksize;
1731 }
1732
1733 /* Chain in any previously buffered data */
1734 if (req_ctx->nbuf) {
1735 nsg = (req_ctx->nbuf < nbytes_to_hash) ? 2 : 1;
1736 sg_init_table(req_ctx->bufsl, nsg);
1737 sg_set_buf(req_ctx->bufsl, req_ctx->buf, req_ctx->nbuf);
1738 if (nsg > 1)
1739 scatterwalk_sg_chain(req_ctx->bufsl, 2, areq->src);
1740 req_ctx->psrc = req_ctx->bufsl;
1741 } else
1742 req_ctx->psrc = areq->src;
1743
1744 if (to_hash_later) {
1745 int nents = sg_count(areq->src, nbytes, &chained);
1746 sg_pcopy_to_buffer(areq->src, nents,
1747 req_ctx->bufnext,
1748 to_hash_later,
1749 nbytes - to_hash_later);
1750 }
1751 req_ctx->to_hash_later = to_hash_later;
1752
1753 /* Allocate extended descriptor */
1754 edesc = ahash_edesc_alloc(areq, nbytes_to_hash);
1755 if (IS_ERR(edesc))
1756 return PTR_ERR(edesc);
1757
1758 edesc->desc.hdr = ctx->desc_hdr_template;
1759
1760 /* On last one, request SEC to pad; otherwise continue */
1761 if (req_ctx->last)
1762 edesc->desc.hdr |= DESC_HDR_MODE0_MDEU_PAD;
1763 else
1764 edesc->desc.hdr |= DESC_HDR_MODE0_MDEU_CONT;
1765
1766 /* request SEC to INIT hash. */
1767 if (req_ctx->first && !req_ctx->swinit)
1768 edesc->desc.hdr |= DESC_HDR_MODE0_MDEU_INIT;
1769
1770 /* When the tfm context has a keylen, it's an HMAC.
1771 * A first or last (ie. not middle) descriptor must request HMAC.
1772 */
1773 if (ctx->keylen && (req_ctx->first || req_ctx->last))
1774 edesc->desc.hdr |= DESC_HDR_MODE0_MDEU_HMAC;
1775
1776 return common_nonsnoop_hash(edesc, areq, nbytes_to_hash,
1777 ahash_done);
1778 }
1779
ahash_update(struct ahash_request * areq)1780 static int ahash_update(struct ahash_request *areq)
1781 {
1782 struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1783
1784 req_ctx->last = 0;
1785
1786 return ahash_process_req(areq, areq->nbytes);
1787 }
1788
ahash_final(struct ahash_request * areq)1789 static int ahash_final(struct ahash_request *areq)
1790 {
1791 struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1792
1793 req_ctx->last = 1;
1794
1795 return ahash_process_req(areq, 0);
1796 }
1797
ahash_finup(struct ahash_request * areq)1798 static int ahash_finup(struct ahash_request *areq)
1799 {
1800 struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1801
1802 req_ctx->last = 1;
1803
1804 return ahash_process_req(areq, areq->nbytes);
1805 }
1806
ahash_digest(struct ahash_request * areq)1807 static int ahash_digest(struct ahash_request *areq)
1808 {
1809 struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
1810 struct crypto_ahash *ahash = crypto_ahash_reqtfm(areq);
1811
1812 ahash->init(areq);
1813 req_ctx->last = 1;
1814
1815 return ahash_process_req(areq, areq->nbytes);
1816 }
1817
1818 struct keyhash_result {
1819 struct completion completion;
1820 int err;
1821 };
1822
keyhash_complete(struct crypto_async_request * req,int err)1823 static void keyhash_complete(struct crypto_async_request *req, int err)
1824 {
1825 struct keyhash_result *res = req->data;
1826
1827 if (err == -EINPROGRESS)
1828 return;
1829
1830 res->err = err;
1831 complete(&res->completion);
1832 }
1833
keyhash(struct crypto_ahash * tfm,const u8 * key,unsigned int keylen,u8 * hash)1834 static int keyhash(struct crypto_ahash *tfm, const u8 *key, unsigned int keylen,
1835 u8 *hash)
1836 {
1837 struct talitos_ctx *ctx = crypto_tfm_ctx(crypto_ahash_tfm(tfm));
1838
1839 struct scatterlist sg[1];
1840 struct ahash_request *req;
1841 struct keyhash_result hresult;
1842 int ret;
1843
1844 init_completion(&hresult.completion);
1845
1846 req = ahash_request_alloc(tfm, GFP_KERNEL);
1847 if (!req)
1848 return -ENOMEM;
1849
1850 /* Keep tfm keylen == 0 during hash of the long key */
1851 ctx->keylen = 0;
1852 ahash_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
1853 keyhash_complete, &hresult);
1854
1855 sg_init_one(&sg[0], key, keylen);
1856
1857 ahash_request_set_crypt(req, sg, hash, keylen);
1858 ret = crypto_ahash_digest(req);
1859 switch (ret) {
1860 case 0:
1861 break;
1862 case -EINPROGRESS:
1863 case -EBUSY:
1864 ret = wait_for_completion_interruptible(
1865 &hresult.completion);
1866 if (!ret)
1867 ret = hresult.err;
1868 break;
1869 default:
1870 break;
1871 }
1872 ahash_request_free(req);
1873
1874 return ret;
1875 }
1876
ahash_setkey(struct crypto_ahash * tfm,const u8 * key,unsigned int keylen)1877 static int ahash_setkey(struct crypto_ahash *tfm, const u8 *key,
1878 unsigned int keylen)
1879 {
1880 struct talitos_ctx *ctx = crypto_tfm_ctx(crypto_ahash_tfm(tfm));
1881 unsigned int blocksize =
1882 crypto_tfm_alg_blocksize(crypto_ahash_tfm(tfm));
1883 unsigned int digestsize = crypto_ahash_digestsize(tfm);
1884 unsigned int keysize = keylen;
1885 u8 hash[SHA512_DIGEST_SIZE];
1886 int ret;
1887
1888 if (keylen <= blocksize)
1889 memcpy(ctx->key, key, keysize);
1890 else {
1891 /* Must get the hash of the long key */
1892 ret = keyhash(tfm, key, keylen, hash);
1893
1894 if (ret) {
1895 crypto_ahash_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
1896 return -EINVAL;
1897 }
1898
1899 keysize = digestsize;
1900 memcpy(ctx->key, hash, digestsize);
1901 }
1902
1903 ctx->keylen = keysize;
1904
1905 return 0;
1906 }
1907
1908
1909 struct talitos_alg_template {
1910 u32 type;
1911 union {
1912 struct crypto_alg crypto;
1913 struct ahash_alg hash;
1914 } alg;
1915 __be32 desc_hdr_template;
1916 };
1917
1918 static struct talitos_alg_template driver_algs[] = {
1919 /* AEAD algorithms. These use a single-pass ipsec_esp descriptor */
1920 { .type = CRYPTO_ALG_TYPE_AEAD,
1921 .alg.crypto = {
1922 .cra_name = "authenc(hmac(sha1),cbc(aes))",
1923 .cra_driver_name = "authenc-hmac-sha1-cbc-aes-talitos",
1924 .cra_blocksize = AES_BLOCK_SIZE,
1925 .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
1926 .cra_aead = {
1927 .ivsize = AES_BLOCK_SIZE,
1928 .maxauthsize = SHA1_DIGEST_SIZE,
1929 }
1930 },
1931 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
1932 DESC_HDR_SEL0_AESU |
1933 DESC_HDR_MODE0_AESU_CBC |
1934 DESC_HDR_SEL1_MDEUA |
1935 DESC_HDR_MODE1_MDEU_INIT |
1936 DESC_HDR_MODE1_MDEU_PAD |
1937 DESC_HDR_MODE1_MDEU_SHA1_HMAC,
1938 },
1939 { .type = CRYPTO_ALG_TYPE_AEAD,
1940 .alg.crypto = {
1941 .cra_name = "authenc(hmac(sha1),cbc(des3_ede))",
1942 .cra_driver_name = "authenc-hmac-sha1-cbc-3des-talitos",
1943 .cra_blocksize = DES3_EDE_BLOCK_SIZE,
1944 .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
1945 .cra_aead = {
1946 .ivsize = DES3_EDE_BLOCK_SIZE,
1947 .maxauthsize = SHA1_DIGEST_SIZE,
1948 }
1949 },
1950 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
1951 DESC_HDR_SEL0_DEU |
1952 DESC_HDR_MODE0_DEU_CBC |
1953 DESC_HDR_MODE0_DEU_3DES |
1954 DESC_HDR_SEL1_MDEUA |
1955 DESC_HDR_MODE1_MDEU_INIT |
1956 DESC_HDR_MODE1_MDEU_PAD |
1957 DESC_HDR_MODE1_MDEU_SHA1_HMAC,
1958 },
1959 { .type = CRYPTO_ALG_TYPE_AEAD,
1960 .alg.crypto = {
1961 .cra_name = "authenc(hmac(sha224),cbc(aes))",
1962 .cra_driver_name = "authenc-hmac-sha224-cbc-aes-talitos",
1963 .cra_blocksize = AES_BLOCK_SIZE,
1964 .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
1965 .cra_aead = {
1966 .ivsize = AES_BLOCK_SIZE,
1967 .maxauthsize = SHA224_DIGEST_SIZE,
1968 }
1969 },
1970 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
1971 DESC_HDR_SEL0_AESU |
1972 DESC_HDR_MODE0_AESU_CBC |
1973 DESC_HDR_SEL1_MDEUA |
1974 DESC_HDR_MODE1_MDEU_INIT |
1975 DESC_HDR_MODE1_MDEU_PAD |
1976 DESC_HDR_MODE1_MDEU_SHA224_HMAC,
1977 },
1978 { .type = CRYPTO_ALG_TYPE_AEAD,
1979 .alg.crypto = {
1980 .cra_name = "authenc(hmac(sha224),cbc(des3_ede))",
1981 .cra_driver_name = "authenc-hmac-sha224-cbc-3des-talitos",
1982 .cra_blocksize = DES3_EDE_BLOCK_SIZE,
1983 .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
1984 .cra_aead = {
1985 .ivsize = DES3_EDE_BLOCK_SIZE,
1986 .maxauthsize = SHA224_DIGEST_SIZE,
1987 }
1988 },
1989 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
1990 DESC_HDR_SEL0_DEU |
1991 DESC_HDR_MODE0_DEU_CBC |
1992 DESC_HDR_MODE0_DEU_3DES |
1993 DESC_HDR_SEL1_MDEUA |
1994 DESC_HDR_MODE1_MDEU_INIT |
1995 DESC_HDR_MODE1_MDEU_PAD |
1996 DESC_HDR_MODE1_MDEU_SHA224_HMAC,
1997 },
1998 { .type = CRYPTO_ALG_TYPE_AEAD,
1999 .alg.crypto = {
2000 .cra_name = "authenc(hmac(sha256),cbc(aes))",
2001 .cra_driver_name = "authenc-hmac-sha256-cbc-aes-talitos",
2002 .cra_blocksize = AES_BLOCK_SIZE,
2003 .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
2004 .cra_aead = {
2005 .ivsize = AES_BLOCK_SIZE,
2006 .maxauthsize = SHA256_DIGEST_SIZE,
2007 }
2008 },
2009 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
2010 DESC_HDR_SEL0_AESU |
2011 DESC_HDR_MODE0_AESU_CBC |
2012 DESC_HDR_SEL1_MDEUA |
2013 DESC_HDR_MODE1_MDEU_INIT |
2014 DESC_HDR_MODE1_MDEU_PAD |
2015 DESC_HDR_MODE1_MDEU_SHA256_HMAC,
2016 },
2017 { .type = CRYPTO_ALG_TYPE_AEAD,
2018 .alg.crypto = {
2019 .cra_name = "authenc(hmac(sha256),cbc(des3_ede))",
2020 .cra_driver_name = "authenc-hmac-sha256-cbc-3des-talitos",
2021 .cra_blocksize = DES3_EDE_BLOCK_SIZE,
2022 .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
2023 .cra_aead = {
2024 .ivsize = DES3_EDE_BLOCK_SIZE,
2025 .maxauthsize = SHA256_DIGEST_SIZE,
2026 }
2027 },
2028 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
2029 DESC_HDR_SEL0_DEU |
2030 DESC_HDR_MODE0_DEU_CBC |
2031 DESC_HDR_MODE0_DEU_3DES |
2032 DESC_HDR_SEL1_MDEUA |
2033 DESC_HDR_MODE1_MDEU_INIT |
2034 DESC_HDR_MODE1_MDEU_PAD |
2035 DESC_HDR_MODE1_MDEU_SHA256_HMAC,
2036 },
2037 { .type = CRYPTO_ALG_TYPE_AEAD,
2038 .alg.crypto = {
2039 .cra_name = "authenc(hmac(sha384),cbc(aes))",
2040 .cra_driver_name = "authenc-hmac-sha384-cbc-aes-talitos",
2041 .cra_blocksize = AES_BLOCK_SIZE,
2042 .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
2043 .cra_aead = {
2044 .ivsize = AES_BLOCK_SIZE,
2045 .maxauthsize = SHA384_DIGEST_SIZE,
2046 }
2047 },
2048 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
2049 DESC_HDR_SEL0_AESU |
2050 DESC_HDR_MODE0_AESU_CBC |
2051 DESC_HDR_SEL1_MDEUB |
2052 DESC_HDR_MODE1_MDEU_INIT |
2053 DESC_HDR_MODE1_MDEU_PAD |
2054 DESC_HDR_MODE1_MDEUB_SHA384_HMAC,
2055 },
2056 { .type = CRYPTO_ALG_TYPE_AEAD,
2057 .alg.crypto = {
2058 .cra_name = "authenc(hmac(sha384),cbc(des3_ede))",
2059 .cra_driver_name = "authenc-hmac-sha384-cbc-3des-talitos",
2060 .cra_blocksize = DES3_EDE_BLOCK_SIZE,
2061 .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
2062 .cra_aead = {
2063 .ivsize = DES3_EDE_BLOCK_SIZE,
2064 .maxauthsize = SHA384_DIGEST_SIZE,
2065 }
2066 },
2067 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
2068 DESC_HDR_SEL0_DEU |
2069 DESC_HDR_MODE0_DEU_CBC |
2070 DESC_HDR_MODE0_DEU_3DES |
2071 DESC_HDR_SEL1_MDEUB |
2072 DESC_HDR_MODE1_MDEU_INIT |
2073 DESC_HDR_MODE1_MDEU_PAD |
2074 DESC_HDR_MODE1_MDEUB_SHA384_HMAC,
2075 },
2076 { .type = CRYPTO_ALG_TYPE_AEAD,
2077 .alg.crypto = {
2078 .cra_name = "authenc(hmac(sha512),cbc(aes))",
2079 .cra_driver_name = "authenc-hmac-sha512-cbc-aes-talitos",
2080 .cra_blocksize = AES_BLOCK_SIZE,
2081 .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
2082 .cra_aead = {
2083 .ivsize = AES_BLOCK_SIZE,
2084 .maxauthsize = SHA512_DIGEST_SIZE,
2085 }
2086 },
2087 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
2088 DESC_HDR_SEL0_AESU |
2089 DESC_HDR_MODE0_AESU_CBC |
2090 DESC_HDR_SEL1_MDEUB |
2091 DESC_HDR_MODE1_MDEU_INIT |
2092 DESC_HDR_MODE1_MDEU_PAD |
2093 DESC_HDR_MODE1_MDEUB_SHA512_HMAC,
2094 },
2095 { .type = CRYPTO_ALG_TYPE_AEAD,
2096 .alg.crypto = {
2097 .cra_name = "authenc(hmac(sha512),cbc(des3_ede))",
2098 .cra_driver_name = "authenc-hmac-sha512-cbc-3des-talitos",
2099 .cra_blocksize = DES3_EDE_BLOCK_SIZE,
2100 .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
2101 .cra_aead = {
2102 .ivsize = DES3_EDE_BLOCK_SIZE,
2103 .maxauthsize = SHA512_DIGEST_SIZE,
2104 }
2105 },
2106 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
2107 DESC_HDR_SEL0_DEU |
2108 DESC_HDR_MODE0_DEU_CBC |
2109 DESC_HDR_MODE0_DEU_3DES |
2110 DESC_HDR_SEL1_MDEUB |
2111 DESC_HDR_MODE1_MDEU_INIT |
2112 DESC_HDR_MODE1_MDEU_PAD |
2113 DESC_HDR_MODE1_MDEUB_SHA512_HMAC,
2114 },
2115 { .type = CRYPTO_ALG_TYPE_AEAD,
2116 .alg.crypto = {
2117 .cra_name = "authenc(hmac(md5),cbc(aes))",
2118 .cra_driver_name = "authenc-hmac-md5-cbc-aes-talitos",
2119 .cra_blocksize = AES_BLOCK_SIZE,
2120 .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
2121 .cra_aead = {
2122 .ivsize = AES_BLOCK_SIZE,
2123 .maxauthsize = MD5_DIGEST_SIZE,
2124 }
2125 },
2126 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
2127 DESC_HDR_SEL0_AESU |
2128 DESC_HDR_MODE0_AESU_CBC |
2129 DESC_HDR_SEL1_MDEUA |
2130 DESC_HDR_MODE1_MDEU_INIT |
2131 DESC_HDR_MODE1_MDEU_PAD |
2132 DESC_HDR_MODE1_MDEU_MD5_HMAC,
2133 },
2134 { .type = CRYPTO_ALG_TYPE_AEAD,
2135 .alg.crypto = {
2136 .cra_name = "authenc(hmac(md5),cbc(des3_ede))",
2137 .cra_driver_name = "authenc-hmac-md5-cbc-3des-talitos",
2138 .cra_blocksize = DES3_EDE_BLOCK_SIZE,
2139 .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
2140 .cra_aead = {
2141 .ivsize = DES3_EDE_BLOCK_SIZE,
2142 .maxauthsize = MD5_DIGEST_SIZE,
2143 }
2144 },
2145 .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP |
2146 DESC_HDR_SEL0_DEU |
2147 DESC_HDR_MODE0_DEU_CBC |
2148 DESC_HDR_MODE0_DEU_3DES |
2149 DESC_HDR_SEL1_MDEUA |
2150 DESC_HDR_MODE1_MDEU_INIT |
2151 DESC_HDR_MODE1_MDEU_PAD |
2152 DESC_HDR_MODE1_MDEU_MD5_HMAC,
2153 },
2154 /* ABLKCIPHER algorithms. */
2155 { .type = CRYPTO_ALG_TYPE_ABLKCIPHER,
2156 .alg.crypto = {
2157 .cra_name = "cbc(aes)",
2158 .cra_driver_name = "cbc-aes-talitos",
2159 .cra_blocksize = AES_BLOCK_SIZE,
2160 .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
2161 CRYPTO_ALG_ASYNC,
2162 .cra_ablkcipher = {
2163 .min_keysize = AES_MIN_KEY_SIZE,
2164 .max_keysize = AES_MAX_KEY_SIZE,
2165 .ivsize = AES_BLOCK_SIZE,
2166 }
2167 },
2168 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2169 DESC_HDR_SEL0_AESU |
2170 DESC_HDR_MODE0_AESU_CBC,
2171 },
2172 { .type = CRYPTO_ALG_TYPE_ABLKCIPHER,
2173 .alg.crypto = {
2174 .cra_name = "cbc(des3_ede)",
2175 .cra_driver_name = "cbc-3des-talitos",
2176 .cra_blocksize = DES3_EDE_BLOCK_SIZE,
2177 .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
2178 CRYPTO_ALG_ASYNC,
2179 .cra_ablkcipher = {
2180 .min_keysize = DES3_EDE_KEY_SIZE,
2181 .max_keysize = DES3_EDE_KEY_SIZE,
2182 .ivsize = DES3_EDE_BLOCK_SIZE,
2183 }
2184 },
2185 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2186 DESC_HDR_SEL0_DEU |
2187 DESC_HDR_MODE0_DEU_CBC |
2188 DESC_HDR_MODE0_DEU_3DES,
2189 },
2190 /* AHASH algorithms. */
2191 { .type = CRYPTO_ALG_TYPE_AHASH,
2192 .alg.hash = {
2193 .halg.digestsize = MD5_DIGEST_SIZE,
2194 .halg.base = {
2195 .cra_name = "md5",
2196 .cra_driver_name = "md5-talitos",
2197 .cra_blocksize = MD5_HMAC_BLOCK_SIZE,
2198 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2199 CRYPTO_ALG_ASYNC,
2200 }
2201 },
2202 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2203 DESC_HDR_SEL0_MDEUA |
2204 DESC_HDR_MODE0_MDEU_MD5,
2205 },
2206 { .type = CRYPTO_ALG_TYPE_AHASH,
2207 .alg.hash = {
2208 .halg.digestsize = SHA1_DIGEST_SIZE,
2209 .halg.base = {
2210 .cra_name = "sha1",
2211 .cra_driver_name = "sha1-talitos",
2212 .cra_blocksize = SHA1_BLOCK_SIZE,
2213 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2214 CRYPTO_ALG_ASYNC,
2215 }
2216 },
2217 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2218 DESC_HDR_SEL0_MDEUA |
2219 DESC_HDR_MODE0_MDEU_SHA1,
2220 },
2221 { .type = CRYPTO_ALG_TYPE_AHASH,
2222 .alg.hash = {
2223 .halg.digestsize = SHA224_DIGEST_SIZE,
2224 .halg.base = {
2225 .cra_name = "sha224",
2226 .cra_driver_name = "sha224-talitos",
2227 .cra_blocksize = SHA224_BLOCK_SIZE,
2228 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2229 CRYPTO_ALG_ASYNC,
2230 }
2231 },
2232 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2233 DESC_HDR_SEL0_MDEUA |
2234 DESC_HDR_MODE0_MDEU_SHA224,
2235 },
2236 { .type = CRYPTO_ALG_TYPE_AHASH,
2237 .alg.hash = {
2238 .halg.digestsize = SHA256_DIGEST_SIZE,
2239 .halg.base = {
2240 .cra_name = "sha256",
2241 .cra_driver_name = "sha256-talitos",
2242 .cra_blocksize = SHA256_BLOCK_SIZE,
2243 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2244 CRYPTO_ALG_ASYNC,
2245 }
2246 },
2247 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2248 DESC_HDR_SEL0_MDEUA |
2249 DESC_HDR_MODE0_MDEU_SHA256,
2250 },
2251 { .type = CRYPTO_ALG_TYPE_AHASH,
2252 .alg.hash = {
2253 .halg.digestsize = SHA384_DIGEST_SIZE,
2254 .halg.base = {
2255 .cra_name = "sha384",
2256 .cra_driver_name = "sha384-talitos",
2257 .cra_blocksize = SHA384_BLOCK_SIZE,
2258 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2259 CRYPTO_ALG_ASYNC,
2260 }
2261 },
2262 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2263 DESC_HDR_SEL0_MDEUB |
2264 DESC_HDR_MODE0_MDEUB_SHA384,
2265 },
2266 { .type = CRYPTO_ALG_TYPE_AHASH,
2267 .alg.hash = {
2268 .halg.digestsize = SHA512_DIGEST_SIZE,
2269 .halg.base = {
2270 .cra_name = "sha512",
2271 .cra_driver_name = "sha512-talitos",
2272 .cra_blocksize = SHA512_BLOCK_SIZE,
2273 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2274 CRYPTO_ALG_ASYNC,
2275 }
2276 },
2277 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2278 DESC_HDR_SEL0_MDEUB |
2279 DESC_HDR_MODE0_MDEUB_SHA512,
2280 },
2281 { .type = CRYPTO_ALG_TYPE_AHASH,
2282 .alg.hash = {
2283 .halg.digestsize = MD5_DIGEST_SIZE,
2284 .halg.base = {
2285 .cra_name = "hmac(md5)",
2286 .cra_driver_name = "hmac-md5-talitos",
2287 .cra_blocksize = MD5_HMAC_BLOCK_SIZE,
2288 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2289 CRYPTO_ALG_ASYNC,
2290 }
2291 },
2292 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2293 DESC_HDR_SEL0_MDEUA |
2294 DESC_HDR_MODE0_MDEU_MD5,
2295 },
2296 { .type = CRYPTO_ALG_TYPE_AHASH,
2297 .alg.hash = {
2298 .halg.digestsize = SHA1_DIGEST_SIZE,
2299 .halg.base = {
2300 .cra_name = "hmac(sha1)",
2301 .cra_driver_name = "hmac-sha1-talitos",
2302 .cra_blocksize = SHA1_BLOCK_SIZE,
2303 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2304 CRYPTO_ALG_ASYNC,
2305 }
2306 },
2307 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2308 DESC_HDR_SEL0_MDEUA |
2309 DESC_HDR_MODE0_MDEU_SHA1,
2310 },
2311 { .type = CRYPTO_ALG_TYPE_AHASH,
2312 .alg.hash = {
2313 .halg.digestsize = SHA224_DIGEST_SIZE,
2314 .halg.base = {
2315 .cra_name = "hmac(sha224)",
2316 .cra_driver_name = "hmac-sha224-talitos",
2317 .cra_blocksize = SHA224_BLOCK_SIZE,
2318 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2319 CRYPTO_ALG_ASYNC,
2320 }
2321 },
2322 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2323 DESC_HDR_SEL0_MDEUA |
2324 DESC_HDR_MODE0_MDEU_SHA224,
2325 },
2326 { .type = CRYPTO_ALG_TYPE_AHASH,
2327 .alg.hash = {
2328 .halg.digestsize = SHA256_DIGEST_SIZE,
2329 .halg.base = {
2330 .cra_name = "hmac(sha256)",
2331 .cra_driver_name = "hmac-sha256-talitos",
2332 .cra_blocksize = SHA256_BLOCK_SIZE,
2333 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2334 CRYPTO_ALG_ASYNC,
2335 }
2336 },
2337 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2338 DESC_HDR_SEL0_MDEUA |
2339 DESC_HDR_MODE0_MDEU_SHA256,
2340 },
2341 { .type = CRYPTO_ALG_TYPE_AHASH,
2342 .alg.hash = {
2343 .halg.digestsize = SHA384_DIGEST_SIZE,
2344 .halg.base = {
2345 .cra_name = "hmac(sha384)",
2346 .cra_driver_name = "hmac-sha384-talitos",
2347 .cra_blocksize = SHA384_BLOCK_SIZE,
2348 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2349 CRYPTO_ALG_ASYNC,
2350 }
2351 },
2352 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2353 DESC_HDR_SEL0_MDEUB |
2354 DESC_HDR_MODE0_MDEUB_SHA384,
2355 },
2356 { .type = CRYPTO_ALG_TYPE_AHASH,
2357 .alg.hash = {
2358 .halg.digestsize = SHA512_DIGEST_SIZE,
2359 .halg.base = {
2360 .cra_name = "hmac(sha512)",
2361 .cra_driver_name = "hmac-sha512-talitos",
2362 .cra_blocksize = SHA512_BLOCK_SIZE,
2363 .cra_flags = CRYPTO_ALG_TYPE_AHASH |
2364 CRYPTO_ALG_ASYNC,
2365 }
2366 },
2367 .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2368 DESC_HDR_SEL0_MDEUB |
2369 DESC_HDR_MODE0_MDEUB_SHA512,
2370 }
2371 };
2372
2373 struct talitos_crypto_alg {
2374 struct list_head entry;
2375 struct device *dev;
2376 struct talitos_alg_template algt;
2377 };
2378
talitos_cra_init(struct crypto_tfm * tfm)2379 static int talitos_cra_init(struct crypto_tfm *tfm)
2380 {
2381 struct crypto_alg *alg = tfm->__crt_alg;
2382 struct talitos_crypto_alg *talitos_alg;
2383 struct talitos_ctx *ctx = crypto_tfm_ctx(tfm);
2384 struct talitos_private *priv;
2385
2386 if ((alg->cra_flags & CRYPTO_ALG_TYPE_MASK) == CRYPTO_ALG_TYPE_AHASH)
2387 talitos_alg = container_of(__crypto_ahash_alg(alg),
2388 struct talitos_crypto_alg,
2389 algt.alg.hash);
2390 else
2391 talitos_alg = container_of(alg, struct talitos_crypto_alg,
2392 algt.alg.crypto);
2393
2394 /* update context with ptr to dev */
2395 ctx->dev = talitos_alg->dev;
2396
2397 /* assign SEC channel to tfm in round-robin fashion */
2398 priv = dev_get_drvdata(ctx->dev);
2399 ctx->ch = atomic_inc_return(&priv->last_chan) &
2400 (priv->num_channels - 1);
2401
2402 /* copy descriptor header template value */
2403 ctx->desc_hdr_template = talitos_alg->algt.desc_hdr_template;
2404
2405 /* select done notification */
2406 ctx->desc_hdr_template |= DESC_HDR_DONE_NOTIFY;
2407
2408 return 0;
2409 }
2410
talitos_cra_init_aead(struct crypto_tfm * tfm)2411 static int talitos_cra_init_aead(struct crypto_tfm *tfm)
2412 {
2413 struct talitos_ctx *ctx = crypto_tfm_ctx(tfm);
2414
2415 talitos_cra_init(tfm);
2416
2417 /* random first IV */
2418 get_random_bytes(ctx->iv, TALITOS_MAX_IV_LENGTH);
2419
2420 return 0;
2421 }
2422
talitos_cra_init_ahash(struct crypto_tfm * tfm)2423 static int talitos_cra_init_ahash(struct crypto_tfm *tfm)
2424 {
2425 struct talitos_ctx *ctx = crypto_tfm_ctx(tfm);
2426
2427 talitos_cra_init(tfm);
2428
2429 ctx->keylen = 0;
2430 crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
2431 sizeof(struct talitos_ahash_req_ctx));
2432
2433 return 0;
2434 }
2435
2436 /*
2437 * given the alg's descriptor header template, determine whether descriptor
2438 * type and primary/secondary execution units required match the hw
2439 * capabilities description provided in the device tree node.
2440 */
hw_supports(struct device * dev,__be32 desc_hdr_template)2441 static int hw_supports(struct device *dev, __be32 desc_hdr_template)
2442 {
2443 struct talitos_private *priv = dev_get_drvdata(dev);
2444 int ret;
2445
2446 ret = (1 << DESC_TYPE(desc_hdr_template) & priv->desc_types) &&
2447 (1 << PRIMARY_EU(desc_hdr_template) & priv->exec_units);
2448
2449 if (SECONDARY_EU(desc_hdr_template))
2450 ret = ret && (1 << SECONDARY_EU(desc_hdr_template)
2451 & priv->exec_units);
2452
2453 return ret;
2454 }
2455
talitos_remove(struct platform_device * ofdev)2456 static int talitos_remove(struct platform_device *ofdev)
2457 {
2458 struct device *dev = &ofdev->dev;
2459 struct talitos_private *priv = dev_get_drvdata(dev);
2460 struct talitos_crypto_alg *t_alg, *n;
2461 int i;
2462
2463 list_for_each_entry_safe(t_alg, n, &priv->alg_list, entry) {
2464 switch (t_alg->algt.type) {
2465 case CRYPTO_ALG_TYPE_ABLKCIPHER:
2466 case CRYPTO_ALG_TYPE_AEAD:
2467 crypto_unregister_alg(&t_alg->algt.alg.crypto);
2468 break;
2469 case CRYPTO_ALG_TYPE_AHASH:
2470 crypto_unregister_ahash(&t_alg->algt.alg.hash);
2471 break;
2472 }
2473 list_del(&t_alg->entry);
2474 kfree(t_alg);
2475 }
2476
2477 if (hw_supports(dev, DESC_HDR_SEL0_RNG))
2478 talitos_unregister_rng(dev);
2479
2480 for (i = 0; i < priv->num_channels; i++)
2481 kfree(priv->chan[i].fifo);
2482
2483 kfree(priv->chan);
2484
2485 for (i = 0; i < 2; i++)
2486 if (priv->irq[i]) {
2487 free_irq(priv->irq[i], dev);
2488 irq_dispose_mapping(priv->irq[i]);
2489 }
2490
2491 tasklet_kill(&priv->done_task[0]);
2492 if (priv->irq[1])
2493 tasklet_kill(&priv->done_task[1]);
2494
2495 iounmap(priv->reg);
2496
2497 kfree(priv);
2498
2499 return 0;
2500 }
2501
talitos_alg_alloc(struct device * dev,struct talitos_alg_template * template)2502 static struct talitos_crypto_alg *talitos_alg_alloc(struct device *dev,
2503 struct talitos_alg_template
2504 *template)
2505 {
2506 struct talitos_private *priv = dev_get_drvdata(dev);
2507 struct talitos_crypto_alg *t_alg;
2508 struct crypto_alg *alg;
2509
2510 t_alg = kzalloc(sizeof(struct talitos_crypto_alg), GFP_KERNEL);
2511 if (!t_alg)
2512 return ERR_PTR(-ENOMEM);
2513
2514 t_alg->algt = *template;
2515
2516 switch (t_alg->algt.type) {
2517 case CRYPTO_ALG_TYPE_ABLKCIPHER:
2518 alg = &t_alg->algt.alg.crypto;
2519 alg->cra_init = talitos_cra_init;
2520 alg->cra_type = &crypto_ablkcipher_type;
2521 alg->cra_ablkcipher.setkey = ablkcipher_setkey;
2522 alg->cra_ablkcipher.encrypt = ablkcipher_encrypt;
2523 alg->cra_ablkcipher.decrypt = ablkcipher_decrypt;
2524 alg->cra_ablkcipher.geniv = "eseqiv";
2525 break;
2526 case CRYPTO_ALG_TYPE_AEAD:
2527 alg = &t_alg->algt.alg.crypto;
2528 alg->cra_init = talitos_cra_init_aead;
2529 alg->cra_type = &crypto_aead_type;
2530 alg->cra_aead.setkey = aead_setkey;
2531 alg->cra_aead.setauthsize = aead_setauthsize;
2532 alg->cra_aead.encrypt = aead_encrypt;
2533 alg->cra_aead.decrypt = aead_decrypt;
2534 alg->cra_aead.givencrypt = aead_givencrypt;
2535 alg->cra_aead.geniv = "<built-in>";
2536 break;
2537 case CRYPTO_ALG_TYPE_AHASH:
2538 alg = &t_alg->algt.alg.hash.halg.base;
2539 alg->cra_init = talitos_cra_init_ahash;
2540 alg->cra_type = &crypto_ahash_type;
2541 t_alg->algt.alg.hash.init = ahash_init;
2542 t_alg->algt.alg.hash.update = ahash_update;
2543 t_alg->algt.alg.hash.final = ahash_final;
2544 t_alg->algt.alg.hash.finup = ahash_finup;
2545 t_alg->algt.alg.hash.digest = ahash_digest;
2546 t_alg->algt.alg.hash.setkey = ahash_setkey;
2547
2548 if (!(priv->features & TALITOS_FTR_HMAC_OK) &&
2549 !strncmp(alg->cra_name, "hmac", 4)) {
2550 kfree(t_alg);
2551 return ERR_PTR(-ENOTSUPP);
2552 }
2553 if (!(priv->features & TALITOS_FTR_SHA224_HWINIT) &&
2554 (!strcmp(alg->cra_name, "sha224") ||
2555 !strcmp(alg->cra_name, "hmac(sha224)"))) {
2556 t_alg->algt.alg.hash.init = ahash_init_sha224_swinit;
2557 t_alg->algt.desc_hdr_template =
2558 DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
2559 DESC_HDR_SEL0_MDEUA |
2560 DESC_HDR_MODE0_MDEU_SHA256;
2561 }
2562 break;
2563 default:
2564 dev_err(dev, "unknown algorithm type %d\n", t_alg->algt.type);
2565 kfree(t_alg);
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
talitos_probe_irq(struct platform_device * ofdev)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
talitos_probe(struct platform_device * ofdev)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 priv->fifo_len = roundup_pow_of_two(priv->chfifo_len);
2710
2711 for (i = 0; i < priv->num_channels; i++) {
2712 priv->chan[i].reg = priv->reg + TALITOS_CH_STRIDE * (i + 1);
2713 if (!priv->irq[1] || !(i & 1))
2714 priv->chan[i].reg += TALITOS_CH_BASE_OFFSET;
2715
2716 spin_lock_init(&priv->chan[i].head_lock);
2717 spin_lock_init(&priv->chan[i].tail_lock);
2718
2719 priv->chan[i].fifo = kzalloc(sizeof(struct talitos_request) *
2720 priv->fifo_len, GFP_KERNEL);
2721 if (!priv->chan[i].fifo) {
2722 dev_err(dev, "failed to allocate request fifo %d\n", i);
2723 err = -ENOMEM;
2724 goto err_out;
2725 }
2726
2727 atomic_set(&priv->chan[i].submit_count,
2728 -(priv->chfifo_len - 1));
2729 }
2730
2731 dma_set_mask(dev, DMA_BIT_MASK(36));
2732
2733 /* reset and initialize the h/w */
2734 err = init_device(dev);
2735 if (err) {
2736 dev_err(dev, "failed to initialize device\n");
2737 goto err_out;
2738 }
2739
2740 /* register the RNG, if available */
2741 if (hw_supports(dev, DESC_HDR_SEL0_RNG)) {
2742 err = talitos_register_rng(dev);
2743 if (err) {
2744 dev_err(dev, "failed to register hwrng: %d\n", err);
2745 goto err_out;
2746 } else
2747 dev_info(dev, "hwrng\n");
2748 }
2749
2750 /* register crypto algorithms the device supports */
2751 for (i = 0; i < ARRAY_SIZE(driver_algs); i++) {
2752 if (hw_supports(dev, driver_algs[i].desc_hdr_template)) {
2753 struct talitos_crypto_alg *t_alg;
2754 char *name = NULL;
2755
2756 t_alg = talitos_alg_alloc(dev, &driver_algs[i]);
2757 if (IS_ERR(t_alg)) {
2758 err = PTR_ERR(t_alg);
2759 if (err == -ENOTSUPP)
2760 continue;
2761 goto err_out;
2762 }
2763
2764 switch (t_alg->algt.type) {
2765 case CRYPTO_ALG_TYPE_ABLKCIPHER:
2766 case CRYPTO_ALG_TYPE_AEAD:
2767 err = crypto_register_alg(
2768 &t_alg->algt.alg.crypto);
2769 name = t_alg->algt.alg.crypto.cra_driver_name;
2770 break;
2771 case CRYPTO_ALG_TYPE_AHASH:
2772 err = crypto_register_ahash(
2773 &t_alg->algt.alg.hash);
2774 name =
2775 t_alg->algt.alg.hash.halg.base.cra_driver_name;
2776 break;
2777 }
2778 if (err) {
2779 dev_err(dev, "%s alg registration failed\n",
2780 name);
2781 kfree(t_alg);
2782 } else
2783 list_add_tail(&t_alg->entry, &priv->alg_list);
2784 }
2785 }
2786 if (!list_empty(&priv->alg_list))
2787 dev_info(dev, "%s algorithms registered in /proc/crypto\n",
2788 (char *)of_get_property(np, "compatible", NULL));
2789
2790 return 0;
2791
2792 err_out:
2793 talitos_remove(ofdev);
2794
2795 return err;
2796 }
2797
2798 static const struct of_device_id talitos_match[] = {
2799 {
2800 .compatible = "fsl,sec2.0",
2801 },
2802 {},
2803 };
2804 MODULE_DEVICE_TABLE(of, talitos_match);
2805
2806 static struct platform_driver talitos_driver = {
2807 .driver = {
2808 .name = "talitos",
2809 .of_match_table = talitos_match,
2810 },
2811 .probe = talitos_probe,
2812 .remove = talitos_remove,
2813 };
2814
2815 module_platform_driver(talitos_driver);
2816
2817 MODULE_LICENSE("GPL");
2818 MODULE_AUTHOR("Kim Phillips <kim.phillips@freescale.com>");
2819 MODULE_DESCRIPTION("Freescale integrated security engine (SEC) driver");
2820