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9c4a7965 KP |
1 | /* |
2 | * talitos - Freescale Integrated Security Engine (SEC) device driver | |
3 | * | |
4 | * Copyright (c) 2008 Freescale Semiconductor, Inc. | |
5 | * | |
6 | * Scatterlist Crypto API glue code copied from files with the following: | |
7 | * Copyright (c) 2006-2007 Herbert Xu <herbert@gondor.apana.org.au> | |
8 | * | |
9 | * Crypto algorithm registration code copied from hifn driver: | |
10 | * 2007+ Copyright (c) Evgeniy Polyakov <johnpol@2ka.mipt.ru> | |
11 | * All rights reserved. | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or | |
16 | * (at your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, | |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | * GNU General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License | |
24 | * along with this program; if not, write to the Free Software | |
25 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
26 | */ | |
27 | ||
28 | #include <linux/kernel.h> | |
29 | #include <linux/module.h> | |
30 | #include <linux/mod_devicetable.h> | |
31 | #include <linux/device.h> | |
32 | #include <linux/interrupt.h> | |
33 | #include <linux/crypto.h> | |
34 | #include <linux/hw_random.h> | |
35 | #include <linux/of_platform.h> | |
36 | #include <linux/dma-mapping.h> | |
37 | #include <linux/io.h> | |
38 | #include <linux/spinlock.h> | |
39 | #include <linux/rtnetlink.h> | |
40 | ||
41 | #include <crypto/algapi.h> | |
42 | #include <crypto/aes.h> | |
3952f17e | 43 | #include <crypto/des.h> |
9c4a7965 KP |
44 | #include <crypto/sha.h> |
45 | #include <crypto/aead.h> | |
46 | #include <crypto/authenc.h> | |
4de9d0b5 LN |
47 | #include <crypto/skcipher.h> |
48 | #include <crypto/scatterwalk.h> | |
9c4a7965 KP |
49 | |
50 | #include "talitos.h" | |
51 | ||
52 | #define TALITOS_TIMEOUT 100000 | |
53 | #define TALITOS_MAX_DATA_LEN 65535 | |
54 | ||
55 | #define DESC_TYPE(desc_hdr) ((be32_to_cpu(desc_hdr) >> 3) & 0x1f) | |
56 | #define PRIMARY_EU(desc_hdr) ((be32_to_cpu(desc_hdr) >> 28) & 0xf) | |
57 | #define SECONDARY_EU(desc_hdr) ((be32_to_cpu(desc_hdr) >> 16) & 0xf) | |
58 | ||
59 | /* descriptor pointer entry */ | |
60 | struct talitos_ptr { | |
61 | __be16 len; /* length */ | |
62 | u8 j_extent; /* jump to sg link table and/or extent */ | |
63 | u8 eptr; /* extended address */ | |
64 | __be32 ptr; /* address */ | |
65 | }; | |
66 | ||
67 | /* descriptor */ | |
68 | struct talitos_desc { | |
69 | __be32 hdr; /* header high bits */ | |
70 | __be32 hdr_lo; /* header low bits */ | |
71 | struct talitos_ptr ptr[7]; /* ptr/len pair array */ | |
72 | }; | |
73 | ||
74 | /** | |
75 | * talitos_request - descriptor submission request | |
76 | * @desc: descriptor pointer (kernel virtual) | |
77 | * @dma_desc: descriptor's physical bus address | |
78 | * @callback: whom to call when descriptor processing is done | |
79 | * @context: caller context (optional) | |
80 | */ | |
81 | struct talitos_request { | |
82 | struct talitos_desc *desc; | |
83 | dma_addr_t dma_desc; | |
84 | void (*callback) (struct device *dev, struct talitos_desc *desc, | |
85 | void *context, int error); | |
86 | void *context; | |
87 | }; | |
88 | ||
89 | struct talitos_private { | |
90 | struct device *dev; | |
91 | struct of_device *ofdev; | |
92 | void __iomem *reg; | |
93 | int irq; | |
94 | ||
95 | /* SEC version geometry (from device tree node) */ | |
96 | unsigned int num_channels; | |
97 | unsigned int chfifo_len; | |
98 | unsigned int exec_units; | |
99 | unsigned int desc_types; | |
100 | ||
f3c85bc1 LN |
101 | /* SEC Compatibility info */ |
102 | unsigned long features; | |
103 | ||
9c4a7965 KP |
104 | /* next channel to be assigned next incoming descriptor */ |
105 | atomic_t last_chan; | |
106 | ||
ec6644d6 KP |
107 | /* per-channel number of requests pending in channel h/w fifo */ |
108 | atomic_t *submit_count; | |
109 | ||
9c4a7965 KP |
110 | /* per-channel request fifo */ |
111 | struct talitos_request **fifo; | |
112 | ||
113 | /* | |
114 | * length of the request fifo | |
115 | * fifo_len is chfifo_len rounded up to next power of 2 | |
116 | * so we can use bitwise ops to wrap | |
117 | */ | |
118 | unsigned int fifo_len; | |
119 | ||
120 | /* per-channel index to next free descriptor request */ | |
121 | int *head; | |
122 | ||
123 | /* per-channel index to next in-progress/done descriptor request */ | |
124 | int *tail; | |
125 | ||
126 | /* per-channel request submission (head) and release (tail) locks */ | |
127 | spinlock_t *head_lock; | |
128 | spinlock_t *tail_lock; | |
129 | ||
130 | /* request callback tasklet */ | |
131 | struct tasklet_struct done_task; | |
9c4a7965 KP |
132 | |
133 | /* list of registered algorithms */ | |
134 | struct list_head alg_list; | |
135 | ||
136 | /* hwrng device */ | |
137 | struct hwrng rng; | |
138 | }; | |
139 | ||
f3c85bc1 LN |
140 | /* .features flag */ |
141 | #define TALITOS_FTR_SRC_LINK_TBL_LEN_INCLUDES_EXTENT 0x00000001 | |
fe5720e2 | 142 | #define TALITOS_FTR_HW_AUTH_CHECK 0x00000002 |
f3c85bc1 | 143 | |
9c4a7965 KP |
144 | /* |
145 | * map virtual single (contiguous) pointer to h/w descriptor pointer | |
146 | */ | |
147 | static void map_single_talitos_ptr(struct device *dev, | |
148 | struct talitos_ptr *talitos_ptr, | |
149 | unsigned short len, void *data, | |
150 | unsigned char extent, | |
151 | enum dma_data_direction dir) | |
152 | { | |
153 | talitos_ptr->len = cpu_to_be16(len); | |
154 | talitos_ptr->ptr = cpu_to_be32(dma_map_single(dev, data, len, dir)); | |
155 | talitos_ptr->j_extent = extent; | |
156 | } | |
157 | ||
158 | /* | |
159 | * unmap bus single (contiguous) h/w descriptor pointer | |
160 | */ | |
161 | static void unmap_single_talitos_ptr(struct device *dev, | |
162 | struct talitos_ptr *talitos_ptr, | |
163 | enum dma_data_direction dir) | |
164 | { | |
165 | dma_unmap_single(dev, be32_to_cpu(talitos_ptr->ptr), | |
166 | be16_to_cpu(talitos_ptr->len), dir); | |
167 | } | |
168 | ||
169 | static int reset_channel(struct device *dev, int ch) | |
170 | { | |
171 | struct talitos_private *priv = dev_get_drvdata(dev); | |
172 | unsigned int timeout = TALITOS_TIMEOUT; | |
173 | ||
174 | setbits32(priv->reg + TALITOS_CCCR(ch), TALITOS_CCCR_RESET); | |
175 | ||
176 | while ((in_be32(priv->reg + TALITOS_CCCR(ch)) & TALITOS_CCCR_RESET) | |
177 | && --timeout) | |
178 | cpu_relax(); | |
179 | ||
180 | if (timeout == 0) { | |
181 | dev_err(dev, "failed to reset channel %d\n", ch); | |
182 | return -EIO; | |
183 | } | |
184 | ||
185 | /* set done writeback and IRQ */ | |
186 | setbits32(priv->reg + TALITOS_CCCR_LO(ch), TALITOS_CCCR_LO_CDWE | | |
187 | TALITOS_CCCR_LO_CDIE); | |
188 | ||
fe5720e2 KP |
189 | /* and ICCR writeback, if available */ |
190 | if (priv->features & TALITOS_FTR_HW_AUTH_CHECK) | |
191 | setbits32(priv->reg + TALITOS_CCCR_LO(ch), | |
192 | TALITOS_CCCR_LO_IWSE); | |
193 | ||
9c4a7965 KP |
194 | return 0; |
195 | } | |
196 | ||
197 | static int reset_device(struct device *dev) | |
198 | { | |
199 | struct talitos_private *priv = dev_get_drvdata(dev); | |
200 | unsigned int timeout = TALITOS_TIMEOUT; | |
201 | ||
202 | setbits32(priv->reg + TALITOS_MCR, TALITOS_MCR_SWR); | |
203 | ||
204 | while ((in_be32(priv->reg + TALITOS_MCR) & TALITOS_MCR_SWR) | |
205 | && --timeout) | |
206 | cpu_relax(); | |
207 | ||
208 | if (timeout == 0) { | |
209 | dev_err(dev, "failed to reset device\n"); | |
210 | return -EIO; | |
211 | } | |
212 | ||
213 | return 0; | |
214 | } | |
215 | ||
216 | /* | |
217 | * Reset and initialize the device | |
218 | */ | |
219 | static int init_device(struct device *dev) | |
220 | { | |
221 | struct talitos_private *priv = dev_get_drvdata(dev); | |
222 | int ch, err; | |
223 | ||
224 | /* | |
225 | * Master reset | |
226 | * errata documentation: warning: certain SEC interrupts | |
227 | * are not fully cleared by writing the MCR:SWR bit, | |
228 | * set bit twice to completely reset | |
229 | */ | |
230 | err = reset_device(dev); | |
231 | if (err) | |
232 | return err; | |
233 | ||
234 | err = reset_device(dev); | |
235 | if (err) | |
236 | return err; | |
237 | ||
238 | /* reset channels */ | |
239 | for (ch = 0; ch < priv->num_channels; ch++) { | |
240 | err = reset_channel(dev, ch); | |
241 | if (err) | |
242 | return err; | |
243 | } | |
244 | ||
245 | /* enable channel done and error interrupts */ | |
246 | setbits32(priv->reg + TALITOS_IMR, TALITOS_IMR_INIT); | |
247 | setbits32(priv->reg + TALITOS_IMR_LO, TALITOS_IMR_LO_INIT); | |
248 | ||
fe5720e2 KP |
249 | /* disable integrity check error interrupts (use writeback instead) */ |
250 | if (priv->features & TALITOS_FTR_HW_AUTH_CHECK) | |
251 | setbits32(priv->reg + TALITOS_MDEUICR_LO, | |
252 | TALITOS_MDEUICR_LO_ICE); | |
253 | ||
9c4a7965 KP |
254 | return 0; |
255 | } | |
256 | ||
257 | /** | |
258 | * talitos_submit - submits a descriptor to the device for processing | |
259 | * @dev: the SEC device to be used | |
260 | * @desc: the descriptor to be processed by the device | |
261 | * @callback: whom to call when processing is complete | |
262 | * @context: a handle for use by caller (optional) | |
263 | * | |
264 | * desc must contain valid dma-mapped (bus physical) address pointers. | |
265 | * callback must check err and feedback in descriptor header | |
266 | * for device processing status. | |
267 | */ | |
268 | static int talitos_submit(struct device *dev, struct talitos_desc *desc, | |
269 | void (*callback)(struct device *dev, | |
270 | struct talitos_desc *desc, | |
271 | void *context, int error), | |
272 | void *context) | |
273 | { | |
274 | struct talitos_private *priv = dev_get_drvdata(dev); | |
275 | struct talitos_request *request; | |
276 | unsigned long flags, ch; | |
277 | int head; | |
278 | ||
279 | /* select done notification */ | |
280 | desc->hdr |= DESC_HDR_DONE_NOTIFY; | |
281 | ||
282 | /* emulate SEC's round-robin channel fifo polling scheme */ | |
283 | ch = atomic_inc_return(&priv->last_chan) & (priv->num_channels - 1); | |
284 | ||
285 | spin_lock_irqsave(&priv->head_lock[ch], flags); | |
286 | ||
ec6644d6 KP |
287 | if (!atomic_inc_not_zero(&priv->submit_count[ch])) { |
288 | /* h/w fifo is full */ | |
9c4a7965 KP |
289 | spin_unlock_irqrestore(&priv->head_lock[ch], flags); |
290 | return -EAGAIN; | |
291 | } | |
292 | ||
ec6644d6 KP |
293 | head = priv->head[ch]; |
294 | request = &priv->fifo[ch][head]; | |
295 | ||
9c4a7965 KP |
296 | /* map descriptor and save caller data */ |
297 | request->dma_desc = dma_map_single(dev, desc, sizeof(*desc), | |
298 | DMA_BIDIRECTIONAL); | |
299 | request->callback = callback; | |
300 | request->context = context; | |
301 | ||
302 | /* increment fifo head */ | |
303 | priv->head[ch] = (priv->head[ch] + 1) & (priv->fifo_len - 1); | |
304 | ||
305 | smp_wmb(); | |
306 | request->desc = desc; | |
307 | ||
308 | /* GO! */ | |
309 | wmb(); | |
310 | out_be32(priv->reg + TALITOS_FF_LO(ch), request->dma_desc); | |
311 | ||
312 | spin_unlock_irqrestore(&priv->head_lock[ch], flags); | |
313 | ||
314 | return -EINPROGRESS; | |
315 | } | |
316 | ||
317 | /* | |
318 | * process what was done, notify callback of error if not | |
319 | */ | |
320 | static void flush_channel(struct device *dev, int ch, int error, int reset_ch) | |
321 | { | |
322 | struct talitos_private *priv = dev_get_drvdata(dev); | |
323 | struct talitos_request *request, saved_req; | |
324 | unsigned long flags; | |
325 | int tail, status; | |
326 | ||
327 | spin_lock_irqsave(&priv->tail_lock[ch], flags); | |
328 | ||
329 | tail = priv->tail[ch]; | |
330 | while (priv->fifo[ch][tail].desc) { | |
331 | request = &priv->fifo[ch][tail]; | |
332 | ||
333 | /* descriptors with their done bits set don't get the error */ | |
334 | rmb(); | |
ca38a814 | 335 | if ((request->desc->hdr & DESC_HDR_DONE) == DESC_HDR_DONE) |
9c4a7965 | 336 | status = 0; |
ca38a814 | 337 | else |
9c4a7965 KP |
338 | if (!error) |
339 | break; | |
340 | else | |
341 | status = error; | |
342 | ||
343 | dma_unmap_single(dev, request->dma_desc, | |
e938e465 KP |
344 | sizeof(struct talitos_desc), |
345 | DMA_BIDIRECTIONAL); | |
9c4a7965 KP |
346 | |
347 | /* copy entries so we can call callback outside lock */ | |
348 | saved_req.desc = request->desc; | |
349 | saved_req.callback = request->callback; | |
350 | saved_req.context = request->context; | |
351 | ||
352 | /* release request entry in fifo */ | |
353 | smp_wmb(); | |
354 | request->desc = NULL; | |
355 | ||
356 | /* increment fifo tail */ | |
357 | priv->tail[ch] = (tail + 1) & (priv->fifo_len - 1); | |
358 | ||
359 | spin_unlock_irqrestore(&priv->tail_lock[ch], flags); | |
ec6644d6 KP |
360 | |
361 | atomic_dec(&priv->submit_count[ch]); | |
362 | ||
9c4a7965 KP |
363 | saved_req.callback(dev, saved_req.desc, saved_req.context, |
364 | status); | |
365 | /* channel may resume processing in single desc error case */ | |
366 | if (error && !reset_ch && status == error) | |
367 | return; | |
368 | spin_lock_irqsave(&priv->tail_lock[ch], flags); | |
369 | tail = priv->tail[ch]; | |
370 | } | |
371 | ||
372 | spin_unlock_irqrestore(&priv->tail_lock[ch], flags); | |
373 | } | |
374 | ||
375 | /* | |
376 | * process completed requests for channels that have done status | |
377 | */ | |
378 | static void talitos_done(unsigned long data) | |
379 | { | |
380 | struct device *dev = (struct device *)data; | |
381 | struct talitos_private *priv = dev_get_drvdata(dev); | |
382 | int ch; | |
383 | ||
384 | for (ch = 0; ch < priv->num_channels; ch++) | |
385 | flush_channel(dev, ch, 0, 0); | |
1c2e8811 LN |
386 | |
387 | /* At this point, all completed channels have been processed. | |
388 | * Unmask done interrupts for channels completed later on. | |
389 | */ | |
fe5720e2 KP |
390 | setbits32(priv->reg + TALITOS_IMR, TALITOS_IMR_INIT); |
391 | setbits32(priv->reg + TALITOS_IMR_LO, TALITOS_IMR_LO_INIT); | |
9c4a7965 KP |
392 | } |
393 | ||
394 | /* | |
395 | * locate current (offending) descriptor | |
396 | */ | |
397 | static struct talitos_desc *current_desc(struct device *dev, int ch) | |
398 | { | |
399 | struct talitos_private *priv = dev_get_drvdata(dev); | |
400 | int tail = priv->tail[ch]; | |
401 | dma_addr_t cur_desc; | |
402 | ||
403 | cur_desc = in_be32(priv->reg + TALITOS_CDPR_LO(ch)); | |
404 | ||
405 | while (priv->fifo[ch][tail].dma_desc != cur_desc) { | |
406 | tail = (tail + 1) & (priv->fifo_len - 1); | |
407 | if (tail == priv->tail[ch]) { | |
408 | dev_err(dev, "couldn't locate current descriptor\n"); | |
409 | return NULL; | |
410 | } | |
411 | } | |
412 | ||
413 | return priv->fifo[ch][tail].desc; | |
414 | } | |
415 | ||
416 | /* | |
417 | * user diagnostics; report root cause of error based on execution unit status | |
418 | */ | |
e938e465 KP |
419 | static void report_eu_error(struct device *dev, int ch, |
420 | struct talitos_desc *desc) | |
9c4a7965 KP |
421 | { |
422 | struct talitos_private *priv = dev_get_drvdata(dev); | |
423 | int i; | |
424 | ||
425 | switch (desc->hdr & DESC_HDR_SEL0_MASK) { | |
426 | case DESC_HDR_SEL0_AFEU: | |
427 | dev_err(dev, "AFEUISR 0x%08x_%08x\n", | |
428 | in_be32(priv->reg + TALITOS_AFEUISR), | |
429 | in_be32(priv->reg + TALITOS_AFEUISR_LO)); | |
430 | break; | |
431 | case DESC_HDR_SEL0_DEU: | |
432 | dev_err(dev, "DEUISR 0x%08x_%08x\n", | |
433 | in_be32(priv->reg + TALITOS_DEUISR), | |
434 | in_be32(priv->reg + TALITOS_DEUISR_LO)); | |
435 | break; | |
436 | case DESC_HDR_SEL0_MDEUA: | |
437 | case DESC_HDR_SEL0_MDEUB: | |
438 | dev_err(dev, "MDEUISR 0x%08x_%08x\n", | |
439 | in_be32(priv->reg + TALITOS_MDEUISR), | |
440 | in_be32(priv->reg + TALITOS_MDEUISR_LO)); | |
441 | break; | |
442 | case DESC_HDR_SEL0_RNG: | |
443 | dev_err(dev, "RNGUISR 0x%08x_%08x\n", | |
444 | in_be32(priv->reg + TALITOS_RNGUISR), | |
445 | in_be32(priv->reg + TALITOS_RNGUISR_LO)); | |
446 | break; | |
447 | case DESC_HDR_SEL0_PKEU: | |
448 | dev_err(dev, "PKEUISR 0x%08x_%08x\n", | |
449 | in_be32(priv->reg + TALITOS_PKEUISR), | |
450 | in_be32(priv->reg + TALITOS_PKEUISR_LO)); | |
451 | break; | |
452 | case DESC_HDR_SEL0_AESU: | |
453 | dev_err(dev, "AESUISR 0x%08x_%08x\n", | |
454 | in_be32(priv->reg + TALITOS_AESUISR), | |
455 | in_be32(priv->reg + TALITOS_AESUISR_LO)); | |
456 | break; | |
457 | case DESC_HDR_SEL0_CRCU: | |
458 | dev_err(dev, "CRCUISR 0x%08x_%08x\n", | |
459 | in_be32(priv->reg + TALITOS_CRCUISR), | |
460 | in_be32(priv->reg + TALITOS_CRCUISR_LO)); | |
461 | break; | |
462 | case DESC_HDR_SEL0_KEU: | |
463 | dev_err(dev, "KEUISR 0x%08x_%08x\n", | |
464 | in_be32(priv->reg + TALITOS_KEUISR), | |
465 | in_be32(priv->reg + TALITOS_KEUISR_LO)); | |
466 | break; | |
467 | } | |
468 | ||
469 | switch (desc->hdr & DESC_HDR_SEL1_MASK) { | |
470 | case DESC_HDR_SEL1_MDEUA: | |
471 | case DESC_HDR_SEL1_MDEUB: | |
472 | dev_err(dev, "MDEUISR 0x%08x_%08x\n", | |
473 | in_be32(priv->reg + TALITOS_MDEUISR), | |
474 | in_be32(priv->reg + TALITOS_MDEUISR_LO)); | |
475 | break; | |
476 | case DESC_HDR_SEL1_CRCU: | |
477 | dev_err(dev, "CRCUISR 0x%08x_%08x\n", | |
478 | in_be32(priv->reg + TALITOS_CRCUISR), | |
479 | in_be32(priv->reg + TALITOS_CRCUISR_LO)); | |
480 | break; | |
481 | } | |
482 | ||
483 | for (i = 0; i < 8; i++) | |
484 | dev_err(dev, "DESCBUF 0x%08x_%08x\n", | |
485 | in_be32(priv->reg + TALITOS_DESCBUF(ch) + 8*i), | |
486 | in_be32(priv->reg + TALITOS_DESCBUF_LO(ch) + 8*i)); | |
487 | } | |
488 | ||
489 | /* | |
490 | * recover from error interrupts | |
491 | */ | |
40405f10 | 492 | static void talitos_error(unsigned long data, u32 isr, u32 isr_lo) |
9c4a7965 KP |
493 | { |
494 | struct device *dev = (struct device *)data; | |
495 | struct talitos_private *priv = dev_get_drvdata(dev); | |
496 | unsigned int timeout = TALITOS_TIMEOUT; | |
497 | int ch, error, reset_dev = 0, reset_ch = 0; | |
40405f10 | 498 | u32 v, v_lo; |
9c4a7965 KP |
499 | |
500 | for (ch = 0; ch < priv->num_channels; ch++) { | |
501 | /* skip channels without errors */ | |
502 | if (!(isr & (1 << (ch * 2 + 1)))) | |
503 | continue; | |
504 | ||
505 | error = -EINVAL; | |
506 | ||
507 | v = in_be32(priv->reg + TALITOS_CCPSR(ch)); | |
508 | v_lo = in_be32(priv->reg + TALITOS_CCPSR_LO(ch)); | |
509 | ||
510 | if (v_lo & TALITOS_CCPSR_LO_DOF) { | |
511 | dev_err(dev, "double fetch fifo overflow error\n"); | |
512 | error = -EAGAIN; | |
513 | reset_ch = 1; | |
514 | } | |
515 | if (v_lo & TALITOS_CCPSR_LO_SOF) { | |
516 | /* h/w dropped descriptor */ | |
517 | dev_err(dev, "single fetch fifo overflow error\n"); | |
518 | error = -EAGAIN; | |
519 | } | |
520 | if (v_lo & TALITOS_CCPSR_LO_MDTE) | |
521 | dev_err(dev, "master data transfer error\n"); | |
522 | if (v_lo & TALITOS_CCPSR_LO_SGDLZ) | |
523 | dev_err(dev, "s/g data length zero error\n"); | |
524 | if (v_lo & TALITOS_CCPSR_LO_FPZ) | |
525 | dev_err(dev, "fetch pointer zero error\n"); | |
526 | if (v_lo & TALITOS_CCPSR_LO_IDH) | |
527 | dev_err(dev, "illegal descriptor header error\n"); | |
528 | if (v_lo & TALITOS_CCPSR_LO_IEU) | |
529 | dev_err(dev, "invalid execution unit error\n"); | |
530 | if (v_lo & TALITOS_CCPSR_LO_EU) | |
531 | report_eu_error(dev, ch, current_desc(dev, ch)); | |
532 | if (v_lo & TALITOS_CCPSR_LO_GB) | |
533 | dev_err(dev, "gather boundary error\n"); | |
534 | if (v_lo & TALITOS_CCPSR_LO_GRL) | |
535 | dev_err(dev, "gather return/length error\n"); | |
536 | if (v_lo & TALITOS_CCPSR_LO_SB) | |
537 | dev_err(dev, "scatter boundary error\n"); | |
538 | if (v_lo & TALITOS_CCPSR_LO_SRL) | |
539 | dev_err(dev, "scatter return/length error\n"); | |
540 | ||
541 | flush_channel(dev, ch, error, reset_ch); | |
542 | ||
543 | if (reset_ch) { | |
544 | reset_channel(dev, ch); | |
545 | } else { | |
546 | setbits32(priv->reg + TALITOS_CCCR(ch), | |
547 | TALITOS_CCCR_CONT); | |
548 | setbits32(priv->reg + TALITOS_CCCR_LO(ch), 0); | |
549 | while ((in_be32(priv->reg + TALITOS_CCCR(ch)) & | |
550 | TALITOS_CCCR_CONT) && --timeout) | |
551 | cpu_relax(); | |
552 | if (timeout == 0) { | |
553 | dev_err(dev, "failed to restart channel %d\n", | |
554 | ch); | |
555 | reset_dev = 1; | |
556 | } | |
557 | } | |
558 | } | |
559 | if (reset_dev || isr & ~TALITOS_ISR_CHERR || isr_lo) { | |
560 | dev_err(dev, "done overflow, internal time out, or rngu error: " | |
561 | "ISR 0x%08x_%08x\n", isr, isr_lo); | |
562 | ||
563 | /* purge request queues */ | |
564 | for (ch = 0; ch < priv->num_channels; ch++) | |
565 | flush_channel(dev, ch, -EIO, 1); | |
566 | ||
567 | /* reset and reinitialize the device */ | |
568 | init_device(dev); | |
569 | } | |
570 | } | |
571 | ||
572 | static irqreturn_t talitos_interrupt(int irq, void *data) | |
573 | { | |
574 | struct device *dev = data; | |
575 | struct talitos_private *priv = dev_get_drvdata(dev); | |
576 | u32 isr, isr_lo; | |
577 | ||
578 | isr = in_be32(priv->reg + TALITOS_ISR); | |
579 | isr_lo = in_be32(priv->reg + TALITOS_ISR_LO); | |
ca38a814 LN |
580 | /* Acknowledge interrupt */ |
581 | out_be32(priv->reg + TALITOS_ICR, isr); | |
582 | out_be32(priv->reg + TALITOS_ICR_LO, isr_lo); | |
9c4a7965 | 583 | |
ca38a814 | 584 | if (unlikely((isr & ~TALITOS_ISR_CHDONE) || isr_lo)) |
40405f10 | 585 | talitos_error((unsigned long)data, isr, isr_lo); |
ca38a814 | 586 | else |
1c2e8811 LN |
587 | if (likely(isr & TALITOS_ISR_CHDONE)) { |
588 | /* mask further done interrupts. */ | |
589 | clrbits32(priv->reg + TALITOS_IMR, TALITOS_IMR_DONE); | |
590 | /* done_task will unmask done interrupts at exit */ | |
9c4a7965 | 591 | tasklet_schedule(&priv->done_task); |
1c2e8811 | 592 | } |
9c4a7965 KP |
593 | |
594 | return (isr || isr_lo) ? IRQ_HANDLED : IRQ_NONE; | |
595 | } | |
596 | ||
597 | /* | |
598 | * hwrng | |
599 | */ | |
600 | static int talitos_rng_data_present(struct hwrng *rng, int wait) | |
601 | { | |
602 | struct device *dev = (struct device *)rng->priv; | |
603 | struct talitos_private *priv = dev_get_drvdata(dev); | |
604 | u32 ofl; | |
605 | int i; | |
606 | ||
607 | for (i = 0; i < 20; i++) { | |
608 | ofl = in_be32(priv->reg + TALITOS_RNGUSR_LO) & | |
609 | TALITOS_RNGUSR_LO_OFL; | |
610 | if (ofl || !wait) | |
611 | break; | |
612 | udelay(10); | |
613 | } | |
614 | ||
615 | return !!ofl; | |
616 | } | |
617 | ||
618 | static int talitos_rng_data_read(struct hwrng *rng, u32 *data) | |
619 | { | |
620 | struct device *dev = (struct device *)rng->priv; | |
621 | struct talitos_private *priv = dev_get_drvdata(dev); | |
622 | ||
623 | /* rng fifo requires 64-bit accesses */ | |
624 | *data = in_be32(priv->reg + TALITOS_RNGU_FIFO); | |
625 | *data = in_be32(priv->reg + TALITOS_RNGU_FIFO_LO); | |
626 | ||
627 | return sizeof(u32); | |
628 | } | |
629 | ||
630 | static int talitos_rng_init(struct hwrng *rng) | |
631 | { | |
632 | struct device *dev = (struct device *)rng->priv; | |
633 | struct talitos_private *priv = dev_get_drvdata(dev); | |
634 | unsigned int timeout = TALITOS_TIMEOUT; | |
635 | ||
636 | setbits32(priv->reg + TALITOS_RNGURCR_LO, TALITOS_RNGURCR_LO_SR); | |
637 | while (!(in_be32(priv->reg + TALITOS_RNGUSR_LO) & TALITOS_RNGUSR_LO_RD) | |
638 | && --timeout) | |
639 | cpu_relax(); | |
640 | if (timeout == 0) { | |
641 | dev_err(dev, "failed to reset rng hw\n"); | |
642 | return -ENODEV; | |
643 | } | |
644 | ||
645 | /* start generating */ | |
646 | setbits32(priv->reg + TALITOS_RNGUDSR_LO, 0); | |
647 | ||
648 | return 0; | |
649 | } | |
650 | ||
651 | static int talitos_register_rng(struct device *dev) | |
652 | { | |
653 | struct talitos_private *priv = dev_get_drvdata(dev); | |
654 | ||
655 | priv->rng.name = dev_driver_string(dev), | |
656 | priv->rng.init = talitos_rng_init, | |
657 | priv->rng.data_present = talitos_rng_data_present, | |
658 | priv->rng.data_read = talitos_rng_data_read, | |
659 | priv->rng.priv = (unsigned long)dev; | |
660 | ||
661 | return hwrng_register(&priv->rng); | |
662 | } | |
663 | ||
664 | static void talitos_unregister_rng(struct device *dev) | |
665 | { | |
666 | struct talitos_private *priv = dev_get_drvdata(dev); | |
667 | ||
668 | hwrng_unregister(&priv->rng); | |
669 | } | |
670 | ||
671 | /* | |
672 | * crypto alg | |
673 | */ | |
674 | #define TALITOS_CRA_PRIORITY 3000 | |
675 | #define TALITOS_MAX_KEY_SIZE 64 | |
3952f17e | 676 | #define TALITOS_MAX_IV_LENGTH 16 /* max of AES_BLOCK_SIZE, DES3_EDE_BLOCK_SIZE */ |
70bcaca7 | 677 | |
3952f17e | 678 | #define MD5_DIGEST_SIZE 16 |
9c4a7965 KP |
679 | |
680 | struct talitos_ctx { | |
681 | struct device *dev; | |
682 | __be32 desc_hdr_template; | |
683 | u8 key[TALITOS_MAX_KEY_SIZE]; | |
70bcaca7 | 684 | u8 iv[TALITOS_MAX_IV_LENGTH]; |
9c4a7965 KP |
685 | unsigned int keylen; |
686 | unsigned int enckeylen; | |
687 | unsigned int authkeylen; | |
688 | unsigned int authsize; | |
689 | }; | |
690 | ||
56af8cd4 LN |
691 | static int aead_setauthsize(struct crypto_aead *authenc, |
692 | unsigned int authsize) | |
9c4a7965 KP |
693 | { |
694 | struct talitos_ctx *ctx = crypto_aead_ctx(authenc); | |
695 | ||
696 | ctx->authsize = authsize; | |
697 | ||
698 | return 0; | |
699 | } | |
700 | ||
56af8cd4 LN |
701 | static int aead_setkey(struct crypto_aead *authenc, |
702 | const u8 *key, unsigned int keylen) | |
9c4a7965 KP |
703 | { |
704 | struct talitos_ctx *ctx = crypto_aead_ctx(authenc); | |
705 | struct rtattr *rta = (void *)key; | |
706 | struct crypto_authenc_key_param *param; | |
707 | unsigned int authkeylen; | |
708 | unsigned int enckeylen; | |
709 | ||
710 | if (!RTA_OK(rta, keylen)) | |
711 | goto badkey; | |
712 | ||
713 | if (rta->rta_type != CRYPTO_AUTHENC_KEYA_PARAM) | |
714 | goto badkey; | |
715 | ||
716 | if (RTA_PAYLOAD(rta) < sizeof(*param)) | |
717 | goto badkey; | |
718 | ||
719 | param = RTA_DATA(rta); | |
720 | enckeylen = be32_to_cpu(param->enckeylen); | |
721 | ||
722 | key += RTA_ALIGN(rta->rta_len); | |
723 | keylen -= RTA_ALIGN(rta->rta_len); | |
724 | ||
725 | if (keylen < enckeylen) | |
726 | goto badkey; | |
727 | ||
728 | authkeylen = keylen - enckeylen; | |
729 | ||
730 | if (keylen > TALITOS_MAX_KEY_SIZE) | |
731 | goto badkey; | |
732 | ||
733 | memcpy(&ctx->key, key, keylen); | |
734 | ||
735 | ctx->keylen = keylen; | |
736 | ctx->enckeylen = enckeylen; | |
737 | ctx->authkeylen = authkeylen; | |
738 | ||
739 | return 0; | |
740 | ||
741 | badkey: | |
742 | crypto_aead_set_flags(authenc, CRYPTO_TFM_RES_BAD_KEY_LEN); | |
743 | return -EINVAL; | |
744 | } | |
745 | ||
746 | /* | |
56af8cd4 | 747 | * talitos_edesc - s/w-extended descriptor |
9c4a7965 KP |
748 | * @src_nents: number of segments in input scatterlist |
749 | * @dst_nents: number of segments in output scatterlist | |
750 | * @dma_len: length of dma mapped link_tbl space | |
751 | * @dma_link_tbl: bus physical address of link_tbl | |
752 | * @desc: h/w descriptor | |
753 | * @link_tbl: input and output h/w link tables (if {src,dst}_nents > 1) | |
754 | * | |
755 | * if decrypting (with authcheck), or either one of src_nents or dst_nents | |
756 | * is greater than 1, an integrity check value is concatenated to the end | |
757 | * of link_tbl data | |
758 | */ | |
56af8cd4 | 759 | struct talitos_edesc { |
9c4a7965 KP |
760 | int src_nents; |
761 | int dst_nents; | |
4de9d0b5 LN |
762 | int src_is_chained; |
763 | int dst_is_chained; | |
9c4a7965 KP |
764 | int dma_len; |
765 | dma_addr_t dma_link_tbl; | |
766 | struct talitos_desc desc; | |
767 | struct talitos_ptr link_tbl[0]; | |
768 | }; | |
769 | ||
4de9d0b5 LN |
770 | static int talitos_map_sg(struct device *dev, struct scatterlist *sg, |
771 | unsigned int nents, enum dma_data_direction dir, | |
772 | int chained) | |
773 | { | |
774 | if (unlikely(chained)) | |
775 | while (sg) { | |
776 | dma_map_sg(dev, sg, 1, dir); | |
777 | sg = scatterwalk_sg_next(sg); | |
778 | } | |
779 | else | |
780 | dma_map_sg(dev, sg, nents, dir); | |
781 | return nents; | |
782 | } | |
783 | ||
784 | static void talitos_unmap_sg_chain(struct device *dev, struct scatterlist *sg, | |
785 | enum dma_data_direction dir) | |
786 | { | |
787 | while (sg) { | |
788 | dma_unmap_sg(dev, sg, 1, dir); | |
789 | sg = scatterwalk_sg_next(sg); | |
790 | } | |
791 | } | |
792 | ||
793 | static void talitos_sg_unmap(struct device *dev, | |
794 | struct talitos_edesc *edesc, | |
795 | struct scatterlist *src, | |
796 | struct scatterlist *dst) | |
797 | { | |
798 | unsigned int src_nents = edesc->src_nents ? : 1; | |
799 | unsigned int dst_nents = edesc->dst_nents ? : 1; | |
800 | ||
801 | if (src != dst) { | |
802 | if (edesc->src_is_chained) | |
803 | talitos_unmap_sg_chain(dev, src, DMA_TO_DEVICE); | |
804 | else | |
805 | dma_unmap_sg(dev, src, src_nents, DMA_TO_DEVICE); | |
806 | ||
807 | if (edesc->dst_is_chained) | |
808 | talitos_unmap_sg_chain(dev, dst, DMA_FROM_DEVICE); | |
809 | else | |
810 | dma_unmap_sg(dev, dst, dst_nents, DMA_FROM_DEVICE); | |
811 | } else | |
812 | if (edesc->src_is_chained) | |
813 | talitos_unmap_sg_chain(dev, src, DMA_BIDIRECTIONAL); | |
814 | else | |
815 | dma_unmap_sg(dev, src, src_nents, DMA_BIDIRECTIONAL); | |
816 | } | |
817 | ||
9c4a7965 | 818 | static void ipsec_esp_unmap(struct device *dev, |
56af8cd4 | 819 | struct talitos_edesc *edesc, |
9c4a7965 KP |
820 | struct aead_request *areq) |
821 | { | |
822 | unmap_single_talitos_ptr(dev, &edesc->desc.ptr[6], DMA_FROM_DEVICE); | |
823 | unmap_single_talitos_ptr(dev, &edesc->desc.ptr[3], DMA_TO_DEVICE); | |
824 | unmap_single_talitos_ptr(dev, &edesc->desc.ptr[2], DMA_TO_DEVICE); | |
825 | unmap_single_talitos_ptr(dev, &edesc->desc.ptr[0], DMA_TO_DEVICE); | |
826 | ||
827 | dma_unmap_sg(dev, areq->assoc, 1, DMA_TO_DEVICE); | |
828 | ||
4de9d0b5 | 829 | talitos_sg_unmap(dev, edesc, areq->src, areq->dst); |
9c4a7965 KP |
830 | |
831 | if (edesc->dma_len) | |
832 | dma_unmap_single(dev, edesc->dma_link_tbl, edesc->dma_len, | |
833 | DMA_BIDIRECTIONAL); | |
834 | } | |
835 | ||
836 | /* | |
837 | * ipsec_esp descriptor callbacks | |
838 | */ | |
839 | static void ipsec_esp_encrypt_done(struct device *dev, | |
840 | struct talitos_desc *desc, void *context, | |
841 | int err) | |
842 | { | |
843 | struct aead_request *areq = context; | |
9c4a7965 KP |
844 | struct crypto_aead *authenc = crypto_aead_reqtfm(areq); |
845 | struct talitos_ctx *ctx = crypto_aead_ctx(authenc); | |
19bbbc63 | 846 | struct talitos_edesc *edesc; |
9c4a7965 KP |
847 | struct scatterlist *sg; |
848 | void *icvdata; | |
849 | ||
19bbbc63 KP |
850 | edesc = container_of(desc, struct talitos_edesc, desc); |
851 | ||
9c4a7965 KP |
852 | ipsec_esp_unmap(dev, edesc, areq); |
853 | ||
854 | /* copy the generated ICV to dst */ | |
855 | if (edesc->dma_len) { | |
856 | icvdata = &edesc->link_tbl[edesc->src_nents + | |
f3c85bc1 | 857 | edesc->dst_nents + 2]; |
9c4a7965 KP |
858 | sg = sg_last(areq->dst, edesc->dst_nents); |
859 | memcpy((char *)sg_virt(sg) + sg->length - ctx->authsize, | |
860 | icvdata, ctx->authsize); | |
861 | } | |
862 | ||
863 | kfree(edesc); | |
864 | ||
865 | aead_request_complete(areq, err); | |
866 | } | |
867 | ||
fe5720e2 | 868 | static void ipsec_esp_decrypt_swauth_done(struct device *dev, |
e938e465 KP |
869 | struct talitos_desc *desc, |
870 | void *context, int err) | |
9c4a7965 KP |
871 | { |
872 | struct aead_request *req = context; | |
9c4a7965 KP |
873 | struct crypto_aead *authenc = crypto_aead_reqtfm(req); |
874 | struct talitos_ctx *ctx = crypto_aead_ctx(authenc); | |
19bbbc63 | 875 | struct talitos_edesc *edesc; |
9c4a7965 KP |
876 | struct scatterlist *sg; |
877 | void *icvdata; | |
878 | ||
19bbbc63 KP |
879 | edesc = container_of(desc, struct talitos_edesc, desc); |
880 | ||
9c4a7965 KP |
881 | ipsec_esp_unmap(dev, edesc, req); |
882 | ||
883 | if (!err) { | |
884 | /* auth check */ | |
885 | if (edesc->dma_len) | |
886 | icvdata = &edesc->link_tbl[edesc->src_nents + | |
f3c85bc1 | 887 | edesc->dst_nents + 2]; |
9c4a7965 KP |
888 | else |
889 | icvdata = &edesc->link_tbl[0]; | |
890 | ||
891 | sg = sg_last(req->dst, edesc->dst_nents ? : 1); | |
892 | err = memcmp(icvdata, (char *)sg_virt(sg) + sg->length - | |
893 | ctx->authsize, ctx->authsize) ? -EBADMSG : 0; | |
894 | } | |
895 | ||
896 | kfree(edesc); | |
897 | ||
898 | aead_request_complete(req, err); | |
899 | } | |
900 | ||
fe5720e2 | 901 | static void ipsec_esp_decrypt_hwauth_done(struct device *dev, |
e938e465 KP |
902 | struct talitos_desc *desc, |
903 | void *context, int err) | |
fe5720e2 KP |
904 | { |
905 | struct aead_request *req = context; | |
19bbbc63 KP |
906 | struct talitos_edesc *edesc; |
907 | ||
908 | edesc = container_of(desc, struct talitos_edesc, desc); | |
fe5720e2 KP |
909 | |
910 | ipsec_esp_unmap(dev, edesc, req); | |
911 | ||
912 | /* check ICV auth status */ | |
e938e465 KP |
913 | if (!err && ((desc->hdr_lo & DESC_HDR_LO_ICCR1_MASK) != |
914 | DESC_HDR_LO_ICCR1_PASS)) | |
915 | err = -EBADMSG; | |
fe5720e2 KP |
916 | |
917 | kfree(edesc); | |
918 | ||
919 | aead_request_complete(req, err); | |
920 | } | |
921 | ||
9c4a7965 KP |
922 | /* |
923 | * convert scatterlist to SEC h/w link table format | |
924 | * stop at cryptlen bytes | |
925 | */ | |
70bcaca7 | 926 | static int sg_to_link_tbl(struct scatterlist *sg, int sg_count, |
9c4a7965 KP |
927 | int cryptlen, struct talitos_ptr *link_tbl_ptr) |
928 | { | |
70bcaca7 LN |
929 | int n_sg = sg_count; |
930 | ||
931 | while (n_sg--) { | |
9c4a7965 KP |
932 | link_tbl_ptr->ptr = cpu_to_be32(sg_dma_address(sg)); |
933 | link_tbl_ptr->len = cpu_to_be16(sg_dma_len(sg)); | |
934 | link_tbl_ptr->j_extent = 0; | |
935 | link_tbl_ptr++; | |
936 | cryptlen -= sg_dma_len(sg); | |
4de9d0b5 | 937 | sg = scatterwalk_sg_next(sg); |
9c4a7965 KP |
938 | } |
939 | ||
70bcaca7 | 940 | /* adjust (decrease) last one (or two) entry's len to cryptlen */ |
9c4a7965 | 941 | link_tbl_ptr--; |
c0e741d4 | 942 | while (be16_to_cpu(link_tbl_ptr->len) <= (-cryptlen)) { |
70bcaca7 LN |
943 | /* Empty this entry, and move to previous one */ |
944 | cryptlen += be16_to_cpu(link_tbl_ptr->len); | |
945 | link_tbl_ptr->len = 0; | |
946 | sg_count--; | |
947 | link_tbl_ptr--; | |
948 | } | |
9c4a7965 KP |
949 | link_tbl_ptr->len = cpu_to_be16(be16_to_cpu(link_tbl_ptr->len) |
950 | + cryptlen); | |
951 | ||
952 | /* tag end of link table */ | |
953 | link_tbl_ptr->j_extent = DESC_PTR_LNKTBL_RETURN; | |
70bcaca7 LN |
954 | |
955 | return sg_count; | |
9c4a7965 KP |
956 | } |
957 | ||
958 | /* | |
959 | * fill in and submit ipsec_esp descriptor | |
960 | */ | |
56af8cd4 | 961 | static int ipsec_esp(struct talitos_edesc *edesc, struct aead_request *areq, |
9c4a7965 KP |
962 | u8 *giv, u64 seq, |
963 | void (*callback) (struct device *dev, | |
964 | struct talitos_desc *desc, | |
965 | void *context, int error)) | |
966 | { | |
967 | struct crypto_aead *aead = crypto_aead_reqtfm(areq); | |
968 | struct talitos_ctx *ctx = crypto_aead_ctx(aead); | |
969 | struct device *dev = ctx->dev; | |
970 | struct talitos_desc *desc = &edesc->desc; | |
971 | unsigned int cryptlen = areq->cryptlen; | |
972 | unsigned int authsize = ctx->authsize; | |
973 | unsigned int ivsize; | |
fa86a267 | 974 | int sg_count, ret; |
fe5720e2 | 975 | int sg_link_tbl_len; |
9c4a7965 KP |
976 | |
977 | /* hmac key */ | |
978 | map_single_talitos_ptr(dev, &desc->ptr[0], ctx->authkeylen, &ctx->key, | |
979 | 0, DMA_TO_DEVICE); | |
980 | /* hmac data */ | |
981 | map_single_talitos_ptr(dev, &desc->ptr[1], sg_virt(areq->src) - | |
982 | sg_virt(areq->assoc), sg_virt(areq->assoc), 0, | |
983 | DMA_TO_DEVICE); | |
984 | /* cipher iv */ | |
985 | ivsize = crypto_aead_ivsize(aead); | |
986 | map_single_talitos_ptr(dev, &desc->ptr[2], ivsize, giv ?: areq->iv, 0, | |
987 | DMA_TO_DEVICE); | |
988 | ||
989 | /* cipher key */ | |
990 | map_single_talitos_ptr(dev, &desc->ptr[3], ctx->enckeylen, | |
991 | (char *)&ctx->key + ctx->authkeylen, 0, | |
992 | DMA_TO_DEVICE); | |
993 | ||
994 | /* | |
995 | * cipher in | |
996 | * map and adjust cipher len to aead request cryptlen. | |
997 | * extent is bytes of HMAC postpended to ciphertext, | |
998 | * typically 12 for ipsec | |
999 | */ | |
1000 | desc->ptr[4].len = cpu_to_be16(cryptlen); | |
1001 | desc->ptr[4].j_extent = authsize; | |
1002 | ||
e938e465 KP |
1003 | sg_count = talitos_map_sg(dev, areq->src, edesc->src_nents ? : 1, |
1004 | (areq->src == areq->dst) ? DMA_BIDIRECTIONAL | |
1005 | : DMA_TO_DEVICE, | |
4de9d0b5 | 1006 | edesc->src_is_chained); |
9c4a7965 KP |
1007 | |
1008 | if (sg_count == 1) { | |
1009 | desc->ptr[4].ptr = cpu_to_be32(sg_dma_address(areq->src)); | |
1010 | } else { | |
fe5720e2 KP |
1011 | sg_link_tbl_len = cryptlen; |
1012 | ||
962a9c99 | 1013 | if (edesc->desc.hdr & DESC_HDR_MODE1_MDEU_CICV) |
fe5720e2 | 1014 | sg_link_tbl_len = cryptlen + authsize; |
e938e465 | 1015 | |
fe5720e2 | 1016 | sg_count = sg_to_link_tbl(areq->src, sg_count, sg_link_tbl_len, |
70bcaca7 LN |
1017 | &edesc->link_tbl[0]); |
1018 | if (sg_count > 1) { | |
1019 | desc->ptr[4].j_extent |= DESC_PTR_LNKTBL_JUMP; | |
1020 | desc->ptr[4].ptr = cpu_to_be32(edesc->dma_link_tbl); | |
e938e465 KP |
1021 | dma_sync_single_for_device(dev, edesc->dma_link_tbl, |
1022 | edesc->dma_len, | |
1023 | DMA_BIDIRECTIONAL); | |
70bcaca7 LN |
1024 | } else { |
1025 | /* Only one segment now, so no link tbl needed */ | |
e938e465 KP |
1026 | desc->ptr[4].ptr = cpu_to_be32(sg_dma_address(areq-> |
1027 | src)); | |
70bcaca7 | 1028 | } |
9c4a7965 KP |
1029 | } |
1030 | ||
1031 | /* cipher out */ | |
1032 | desc->ptr[5].len = cpu_to_be16(cryptlen); | |
1033 | desc->ptr[5].j_extent = authsize; | |
1034 | ||
e938e465 | 1035 | if (areq->src != areq->dst) |
4de9d0b5 LN |
1036 | sg_count = talitos_map_sg(dev, areq->dst, |
1037 | edesc->dst_nents ? : 1, | |
1038 | DMA_FROM_DEVICE, | |
1039 | edesc->dst_is_chained); | |
9c4a7965 KP |
1040 | |
1041 | if (sg_count == 1) { | |
1042 | desc->ptr[5].ptr = cpu_to_be32(sg_dma_address(areq->dst)); | |
1043 | } else { | |
1044 | struct talitos_ptr *link_tbl_ptr = | |
f3c85bc1 | 1045 | &edesc->link_tbl[edesc->src_nents + 1]; |
9c4a7965 KP |
1046 | |
1047 | desc->ptr[5].ptr = cpu_to_be32((struct talitos_ptr *) | |
1048 | edesc->dma_link_tbl + | |
f3c85bc1 | 1049 | edesc->src_nents + 1); |
fe5720e2 KP |
1050 | sg_count = sg_to_link_tbl(areq->dst, sg_count, cryptlen, |
1051 | link_tbl_ptr); | |
1052 | ||
f3c85bc1 | 1053 | /* Add an entry to the link table for ICV data */ |
9c4a7965 | 1054 | link_tbl_ptr += sg_count - 1; |
9c4a7965 | 1055 | link_tbl_ptr->j_extent = 0; |
f3c85bc1 | 1056 | sg_count++; |
9c4a7965 KP |
1057 | link_tbl_ptr++; |
1058 | link_tbl_ptr->j_extent = DESC_PTR_LNKTBL_RETURN; | |
1059 | link_tbl_ptr->len = cpu_to_be16(authsize); | |
1060 | ||
1061 | /* icv data follows link tables */ | |
1062 | link_tbl_ptr->ptr = cpu_to_be32((struct talitos_ptr *) | |
1063 | edesc->dma_link_tbl + | |
1064 | edesc->src_nents + | |
f3c85bc1 | 1065 | edesc->dst_nents + 2); |
9c4a7965 KP |
1066 | |
1067 | desc->ptr[5].j_extent |= DESC_PTR_LNKTBL_JUMP; | |
1068 | dma_sync_single_for_device(ctx->dev, edesc->dma_link_tbl, | |
1069 | edesc->dma_len, DMA_BIDIRECTIONAL); | |
1070 | } | |
1071 | ||
1072 | /* iv out */ | |
1073 | map_single_talitos_ptr(dev, &desc->ptr[6], ivsize, ctx->iv, 0, | |
1074 | DMA_FROM_DEVICE); | |
1075 | ||
fa86a267 KP |
1076 | ret = talitos_submit(dev, desc, callback, areq); |
1077 | if (ret != -EINPROGRESS) { | |
1078 | ipsec_esp_unmap(dev, edesc, areq); | |
1079 | kfree(edesc); | |
1080 | } | |
1081 | return ret; | |
9c4a7965 KP |
1082 | } |
1083 | ||
9c4a7965 KP |
1084 | /* |
1085 | * derive number of elements in scatterlist | |
1086 | */ | |
4de9d0b5 | 1087 | static int sg_count(struct scatterlist *sg_list, int nbytes, int *chained) |
9c4a7965 KP |
1088 | { |
1089 | struct scatterlist *sg = sg_list; | |
1090 | int sg_nents = 0; | |
1091 | ||
4de9d0b5 LN |
1092 | *chained = 0; |
1093 | while (nbytes > 0) { | |
9c4a7965 KP |
1094 | sg_nents++; |
1095 | nbytes -= sg->length; | |
4de9d0b5 LN |
1096 | if (!sg_is_last(sg) && (sg + 1)->length == 0) |
1097 | *chained = 1; | |
1098 | sg = scatterwalk_sg_next(sg); | |
9c4a7965 KP |
1099 | } |
1100 | ||
1101 | return sg_nents; | |
1102 | } | |
1103 | ||
1104 | /* | |
56af8cd4 | 1105 | * allocate and map the extended descriptor |
9c4a7965 | 1106 | */ |
4de9d0b5 LN |
1107 | static struct talitos_edesc *talitos_edesc_alloc(struct device *dev, |
1108 | struct scatterlist *src, | |
1109 | struct scatterlist *dst, | |
1110 | unsigned int cryptlen, | |
1111 | unsigned int authsize, | |
1112 | int icv_stashing, | |
1113 | u32 cryptoflags) | |
9c4a7965 | 1114 | { |
56af8cd4 | 1115 | struct talitos_edesc *edesc; |
9c4a7965 | 1116 | int src_nents, dst_nents, alloc_len, dma_len; |
4de9d0b5 LN |
1117 | int src_chained, dst_chained = 0; |
1118 | gfp_t flags = cryptoflags & CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL : | |
586725f8 | 1119 | GFP_ATOMIC; |
9c4a7965 | 1120 | |
4de9d0b5 LN |
1121 | if (cryptlen + authsize > TALITOS_MAX_DATA_LEN) { |
1122 | dev_err(dev, "length exceeds h/w max limit\n"); | |
9c4a7965 KP |
1123 | return ERR_PTR(-EINVAL); |
1124 | } | |
1125 | ||
4de9d0b5 | 1126 | src_nents = sg_count(src, cryptlen + authsize, &src_chained); |
9c4a7965 KP |
1127 | src_nents = (src_nents == 1) ? 0 : src_nents; |
1128 | ||
4de9d0b5 | 1129 | if (dst == src) { |
9c4a7965 KP |
1130 | dst_nents = src_nents; |
1131 | } else { | |
4de9d0b5 | 1132 | dst_nents = sg_count(dst, cryptlen + authsize, &dst_chained); |
695ad589 | 1133 | dst_nents = (dst_nents == 1) ? 0 : dst_nents; |
9c4a7965 KP |
1134 | } |
1135 | ||
1136 | /* | |
1137 | * allocate space for base edesc plus the link tables, | |
f3c85bc1 | 1138 | * allowing for two separate entries for ICV and generated ICV (+ 2), |
9c4a7965 KP |
1139 | * and the ICV data itself |
1140 | */ | |
56af8cd4 | 1141 | alloc_len = sizeof(struct talitos_edesc); |
9c4a7965 | 1142 | if (src_nents || dst_nents) { |
f3c85bc1 | 1143 | dma_len = (src_nents + dst_nents + 2) * |
4de9d0b5 | 1144 | sizeof(struct talitos_ptr) + authsize; |
9c4a7965 KP |
1145 | alloc_len += dma_len; |
1146 | } else { | |
1147 | dma_len = 0; | |
4de9d0b5 | 1148 | alloc_len += icv_stashing ? authsize : 0; |
9c4a7965 KP |
1149 | } |
1150 | ||
586725f8 | 1151 | edesc = kmalloc(alloc_len, GFP_DMA | flags); |
9c4a7965 | 1152 | if (!edesc) { |
4de9d0b5 | 1153 | dev_err(dev, "could not allocate edescriptor\n"); |
9c4a7965 KP |
1154 | return ERR_PTR(-ENOMEM); |
1155 | } | |
1156 | ||
1157 | edesc->src_nents = src_nents; | |
1158 | edesc->dst_nents = dst_nents; | |
4de9d0b5 LN |
1159 | edesc->src_is_chained = src_chained; |
1160 | edesc->dst_is_chained = dst_chained; | |
9c4a7965 | 1161 | edesc->dma_len = dma_len; |
4de9d0b5 | 1162 | edesc->dma_link_tbl = dma_map_single(dev, &edesc->link_tbl[0], |
9c4a7965 KP |
1163 | edesc->dma_len, DMA_BIDIRECTIONAL); |
1164 | ||
1165 | return edesc; | |
1166 | } | |
1167 | ||
4de9d0b5 LN |
1168 | static struct talitos_edesc *aead_edesc_alloc(struct aead_request *areq, |
1169 | int icv_stashing) | |
1170 | { | |
1171 | struct crypto_aead *authenc = crypto_aead_reqtfm(areq); | |
1172 | struct talitos_ctx *ctx = crypto_aead_ctx(authenc); | |
1173 | ||
1174 | return talitos_edesc_alloc(ctx->dev, areq->src, areq->dst, | |
1175 | areq->cryptlen, ctx->authsize, icv_stashing, | |
1176 | areq->base.flags); | |
1177 | } | |
1178 | ||
56af8cd4 | 1179 | static int aead_encrypt(struct aead_request *req) |
9c4a7965 KP |
1180 | { |
1181 | struct crypto_aead *authenc = crypto_aead_reqtfm(req); | |
1182 | struct talitos_ctx *ctx = crypto_aead_ctx(authenc); | |
56af8cd4 | 1183 | struct talitos_edesc *edesc; |
9c4a7965 KP |
1184 | |
1185 | /* allocate extended descriptor */ | |
4de9d0b5 | 1186 | edesc = aead_edesc_alloc(req, 0); |
9c4a7965 KP |
1187 | if (IS_ERR(edesc)) |
1188 | return PTR_ERR(edesc); | |
1189 | ||
1190 | /* set encrypt */ | |
70bcaca7 | 1191 | edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT; |
9c4a7965 KP |
1192 | |
1193 | return ipsec_esp(edesc, req, NULL, 0, ipsec_esp_encrypt_done); | |
1194 | } | |
1195 | ||
56af8cd4 | 1196 | static int aead_decrypt(struct aead_request *req) |
9c4a7965 KP |
1197 | { |
1198 | struct crypto_aead *authenc = crypto_aead_reqtfm(req); | |
1199 | struct talitos_ctx *ctx = crypto_aead_ctx(authenc); | |
1200 | unsigned int authsize = ctx->authsize; | |
fe5720e2 | 1201 | struct talitos_private *priv = dev_get_drvdata(ctx->dev); |
56af8cd4 | 1202 | struct talitos_edesc *edesc; |
9c4a7965 KP |
1203 | struct scatterlist *sg; |
1204 | void *icvdata; | |
1205 | ||
1206 | req->cryptlen -= authsize; | |
1207 | ||
1208 | /* allocate extended descriptor */ | |
4de9d0b5 | 1209 | edesc = aead_edesc_alloc(req, 1); |
9c4a7965 KP |
1210 | if (IS_ERR(edesc)) |
1211 | return PTR_ERR(edesc); | |
1212 | ||
fe5720e2 | 1213 | if ((priv->features & TALITOS_FTR_HW_AUTH_CHECK) && |
e938e465 KP |
1214 | ((!edesc->src_nents && !edesc->dst_nents) || |
1215 | priv->features & TALITOS_FTR_SRC_LINK_TBL_LEN_INCLUDES_EXTENT)) { | |
9c4a7965 | 1216 | |
fe5720e2 | 1217 | /* decrypt and check the ICV */ |
e938e465 KP |
1218 | edesc->desc.hdr = ctx->desc_hdr_template | |
1219 | DESC_HDR_DIR_INBOUND | | |
fe5720e2 | 1220 | DESC_HDR_MODE1_MDEU_CICV; |
9c4a7965 | 1221 | |
fe5720e2 KP |
1222 | /* reset integrity check result bits */ |
1223 | edesc->desc.hdr_lo = 0; | |
9c4a7965 | 1224 | |
e938e465 KP |
1225 | return ipsec_esp(edesc, req, NULL, 0, |
1226 | ipsec_esp_decrypt_hwauth_done); | |
fe5720e2 | 1227 | |
e938e465 | 1228 | } |
fe5720e2 | 1229 | |
e938e465 KP |
1230 | /* Have to check the ICV with software */ |
1231 | edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_DIR_INBOUND; | |
fe5720e2 | 1232 | |
e938e465 KP |
1233 | /* stash incoming ICV for later cmp with ICV generated by the h/w */ |
1234 | if (edesc->dma_len) | |
1235 | icvdata = &edesc->link_tbl[edesc->src_nents + | |
1236 | edesc->dst_nents + 2]; | |
1237 | else | |
1238 | icvdata = &edesc->link_tbl[0]; | |
fe5720e2 | 1239 | |
e938e465 | 1240 | sg = sg_last(req->src, edesc->src_nents ? : 1); |
fe5720e2 | 1241 | |
e938e465 KP |
1242 | memcpy(icvdata, (char *)sg_virt(sg) + sg->length - ctx->authsize, |
1243 | ctx->authsize); | |
fe5720e2 | 1244 | |
e938e465 | 1245 | return ipsec_esp(edesc, req, NULL, 0, ipsec_esp_decrypt_swauth_done); |
9c4a7965 KP |
1246 | } |
1247 | ||
56af8cd4 | 1248 | static int aead_givencrypt(struct aead_givcrypt_request *req) |
9c4a7965 KP |
1249 | { |
1250 | struct aead_request *areq = &req->areq; | |
1251 | struct crypto_aead *authenc = crypto_aead_reqtfm(areq); | |
1252 | struct talitos_ctx *ctx = crypto_aead_ctx(authenc); | |
56af8cd4 | 1253 | struct talitos_edesc *edesc; |
9c4a7965 KP |
1254 | |
1255 | /* allocate extended descriptor */ | |
4de9d0b5 | 1256 | edesc = aead_edesc_alloc(areq, 0); |
9c4a7965 KP |
1257 | if (IS_ERR(edesc)) |
1258 | return PTR_ERR(edesc); | |
1259 | ||
1260 | /* set encrypt */ | |
70bcaca7 | 1261 | edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT; |
9c4a7965 KP |
1262 | |
1263 | memcpy(req->giv, ctx->iv, crypto_aead_ivsize(authenc)); | |
ba95487d KP |
1264 | /* avoid consecutive packets going out with same IV */ |
1265 | *(__be64 *)req->giv ^= cpu_to_be64(req->seq); | |
9c4a7965 KP |
1266 | |
1267 | return ipsec_esp(edesc, areq, req->giv, req->seq, | |
1268 | ipsec_esp_encrypt_done); | |
1269 | } | |
1270 | ||
4de9d0b5 LN |
1271 | static int ablkcipher_setkey(struct crypto_ablkcipher *cipher, |
1272 | const u8 *key, unsigned int keylen) | |
1273 | { | |
1274 | struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher); | |
1275 | struct ablkcipher_alg *alg = crypto_ablkcipher_alg(cipher); | |
1276 | ||
1277 | if (keylen > TALITOS_MAX_KEY_SIZE) | |
1278 | goto badkey; | |
1279 | ||
1280 | if (keylen < alg->min_keysize || keylen > alg->max_keysize) | |
1281 | goto badkey; | |
1282 | ||
1283 | memcpy(&ctx->key, key, keylen); | |
1284 | ctx->keylen = keylen; | |
1285 | ||
1286 | return 0; | |
1287 | ||
1288 | badkey: | |
1289 | crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN); | |
1290 | return -EINVAL; | |
1291 | } | |
1292 | ||
1293 | static void common_nonsnoop_unmap(struct device *dev, | |
1294 | struct talitos_edesc *edesc, | |
1295 | struct ablkcipher_request *areq) | |
1296 | { | |
1297 | unmap_single_talitos_ptr(dev, &edesc->desc.ptr[5], DMA_FROM_DEVICE); | |
1298 | unmap_single_talitos_ptr(dev, &edesc->desc.ptr[2], DMA_TO_DEVICE); | |
1299 | unmap_single_talitos_ptr(dev, &edesc->desc.ptr[1], DMA_TO_DEVICE); | |
1300 | ||
1301 | talitos_sg_unmap(dev, edesc, areq->src, areq->dst); | |
1302 | ||
1303 | if (edesc->dma_len) | |
1304 | dma_unmap_single(dev, edesc->dma_link_tbl, edesc->dma_len, | |
1305 | DMA_BIDIRECTIONAL); | |
1306 | } | |
1307 | ||
1308 | static void ablkcipher_done(struct device *dev, | |
1309 | struct talitos_desc *desc, void *context, | |
1310 | int err) | |
1311 | { | |
1312 | struct ablkcipher_request *areq = context; | |
19bbbc63 KP |
1313 | struct talitos_edesc *edesc; |
1314 | ||
1315 | edesc = container_of(desc, struct talitos_edesc, desc); | |
4de9d0b5 LN |
1316 | |
1317 | common_nonsnoop_unmap(dev, edesc, areq); | |
1318 | ||
1319 | kfree(edesc); | |
1320 | ||
1321 | areq->base.complete(&areq->base, err); | |
1322 | } | |
1323 | ||
1324 | static int common_nonsnoop(struct talitos_edesc *edesc, | |
1325 | struct ablkcipher_request *areq, | |
1326 | u8 *giv, | |
1327 | void (*callback) (struct device *dev, | |
1328 | struct talitos_desc *desc, | |
1329 | void *context, int error)) | |
1330 | { | |
1331 | struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq); | |
1332 | struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher); | |
1333 | struct device *dev = ctx->dev; | |
1334 | struct talitos_desc *desc = &edesc->desc; | |
1335 | unsigned int cryptlen = areq->nbytes; | |
1336 | unsigned int ivsize; | |
1337 | int sg_count, ret; | |
1338 | ||
1339 | /* first DWORD empty */ | |
1340 | desc->ptr[0].len = 0; | |
1341 | desc->ptr[0].ptr = 0; | |
1342 | desc->ptr[0].j_extent = 0; | |
1343 | ||
1344 | /* cipher iv */ | |
1345 | ivsize = crypto_ablkcipher_ivsize(cipher); | |
1346 | map_single_talitos_ptr(dev, &desc->ptr[1], ivsize, giv ?: areq->info, 0, | |
1347 | DMA_TO_DEVICE); | |
1348 | ||
1349 | /* cipher key */ | |
1350 | map_single_talitos_ptr(dev, &desc->ptr[2], ctx->keylen, | |
1351 | (char *)&ctx->key, 0, DMA_TO_DEVICE); | |
1352 | ||
1353 | /* | |
1354 | * cipher in | |
1355 | */ | |
1356 | desc->ptr[3].len = cpu_to_be16(cryptlen); | |
1357 | desc->ptr[3].j_extent = 0; | |
1358 | ||
1359 | sg_count = talitos_map_sg(dev, areq->src, edesc->src_nents ? : 1, | |
1360 | (areq->src == areq->dst) ? DMA_BIDIRECTIONAL | |
1361 | : DMA_TO_DEVICE, | |
1362 | edesc->src_is_chained); | |
1363 | ||
1364 | if (sg_count == 1) { | |
1365 | desc->ptr[3].ptr = cpu_to_be32(sg_dma_address(areq->src)); | |
1366 | } else { | |
1367 | sg_count = sg_to_link_tbl(areq->src, sg_count, cryptlen, | |
1368 | &edesc->link_tbl[0]); | |
1369 | if (sg_count > 1) { | |
1370 | desc->ptr[3].j_extent |= DESC_PTR_LNKTBL_JUMP; | |
1371 | desc->ptr[3].ptr = cpu_to_be32(edesc->dma_link_tbl); | |
e938e465 KP |
1372 | dma_sync_single_for_device(dev, edesc->dma_link_tbl, |
1373 | edesc->dma_len, | |
1374 | DMA_BIDIRECTIONAL); | |
4de9d0b5 LN |
1375 | } else { |
1376 | /* Only one segment now, so no link tbl needed */ | |
e938e465 KP |
1377 | desc->ptr[3].ptr = cpu_to_be32(sg_dma_address(areq-> |
1378 | src)); | |
4de9d0b5 LN |
1379 | } |
1380 | } | |
1381 | ||
1382 | /* cipher out */ | |
1383 | desc->ptr[4].len = cpu_to_be16(cryptlen); | |
1384 | desc->ptr[4].j_extent = 0; | |
1385 | ||
1386 | if (areq->src != areq->dst) | |
1387 | sg_count = talitos_map_sg(dev, areq->dst, | |
1388 | edesc->dst_nents ? : 1, | |
1389 | DMA_FROM_DEVICE, | |
1390 | edesc->dst_is_chained); | |
1391 | ||
1392 | if (sg_count == 1) { | |
1393 | desc->ptr[4].ptr = cpu_to_be32(sg_dma_address(areq->dst)); | |
1394 | } else { | |
1395 | struct talitos_ptr *link_tbl_ptr = | |
1396 | &edesc->link_tbl[edesc->src_nents + 1]; | |
1397 | ||
1398 | desc->ptr[4].j_extent |= DESC_PTR_LNKTBL_JUMP; | |
1399 | desc->ptr[4].ptr = cpu_to_be32((struct talitos_ptr *) | |
1400 | edesc->dma_link_tbl + | |
1401 | edesc->src_nents + 1); | |
1402 | sg_count = sg_to_link_tbl(areq->dst, sg_count, cryptlen, | |
1403 | link_tbl_ptr); | |
1404 | dma_sync_single_for_device(ctx->dev, edesc->dma_link_tbl, | |
1405 | edesc->dma_len, DMA_BIDIRECTIONAL); | |
1406 | } | |
1407 | ||
1408 | /* iv out */ | |
1409 | map_single_talitos_ptr(dev, &desc->ptr[5], ivsize, ctx->iv, 0, | |
1410 | DMA_FROM_DEVICE); | |
1411 | ||
1412 | /* last DWORD empty */ | |
1413 | desc->ptr[6].len = 0; | |
1414 | desc->ptr[6].ptr = 0; | |
1415 | desc->ptr[6].j_extent = 0; | |
1416 | ||
1417 | ret = talitos_submit(dev, desc, callback, areq); | |
1418 | if (ret != -EINPROGRESS) { | |
1419 | common_nonsnoop_unmap(dev, edesc, areq); | |
1420 | kfree(edesc); | |
1421 | } | |
1422 | return ret; | |
1423 | } | |
1424 | ||
e938e465 KP |
1425 | static struct talitos_edesc *ablkcipher_edesc_alloc(struct ablkcipher_request * |
1426 | areq) | |
4de9d0b5 LN |
1427 | { |
1428 | struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq); | |
1429 | struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher); | |
1430 | ||
1431 | return talitos_edesc_alloc(ctx->dev, areq->src, areq->dst, areq->nbytes, | |
1432 | 0, 0, areq->base.flags); | |
1433 | } | |
1434 | ||
1435 | static int ablkcipher_encrypt(struct ablkcipher_request *areq) | |
1436 | { | |
1437 | struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq); | |
1438 | struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher); | |
1439 | struct talitos_edesc *edesc; | |
1440 | ||
1441 | /* allocate extended descriptor */ | |
1442 | edesc = ablkcipher_edesc_alloc(areq); | |
1443 | if (IS_ERR(edesc)) | |
1444 | return PTR_ERR(edesc); | |
1445 | ||
1446 | /* set encrypt */ | |
1447 | edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT; | |
1448 | ||
1449 | return common_nonsnoop(edesc, areq, NULL, ablkcipher_done); | |
1450 | } | |
1451 | ||
1452 | static int ablkcipher_decrypt(struct ablkcipher_request *areq) | |
1453 | { | |
1454 | struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq); | |
1455 | struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher); | |
1456 | struct talitos_edesc *edesc; | |
1457 | ||
1458 | /* allocate extended descriptor */ | |
1459 | edesc = ablkcipher_edesc_alloc(areq); | |
1460 | if (IS_ERR(edesc)) | |
1461 | return PTR_ERR(edesc); | |
1462 | ||
1463 | edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_DIR_INBOUND; | |
1464 | ||
1465 | return common_nonsnoop(edesc, areq, NULL, ablkcipher_done); | |
1466 | } | |
1467 | ||
9c4a7965 | 1468 | struct talitos_alg_template { |
56af8cd4 | 1469 | struct crypto_alg alg; |
9c4a7965 KP |
1470 | __be32 desc_hdr_template; |
1471 | }; | |
1472 | ||
1473 | static struct talitos_alg_template driver_algs[] = { | |
56af8cd4 | 1474 | /* AEAD algorithms. These use a single-pass ipsec_esp descriptor */ |
9c4a7965 | 1475 | { |
56af8cd4 LN |
1476 | .alg = { |
1477 | .cra_name = "authenc(hmac(sha1),cbc(aes))", | |
1478 | .cra_driver_name = "authenc-hmac-sha1-cbc-aes-talitos", | |
1479 | .cra_blocksize = AES_BLOCK_SIZE, | |
1480 | .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC, | |
1481 | .cra_type = &crypto_aead_type, | |
1482 | .cra_aead = { | |
1483 | .setkey = aead_setkey, | |
1484 | .setauthsize = aead_setauthsize, | |
1485 | .encrypt = aead_encrypt, | |
1486 | .decrypt = aead_decrypt, | |
1487 | .givencrypt = aead_givencrypt, | |
1488 | .geniv = "<built-in>", | |
1489 | .ivsize = AES_BLOCK_SIZE, | |
1490 | .maxauthsize = SHA1_DIGEST_SIZE, | |
1491 | } | |
1492 | }, | |
9c4a7965 KP |
1493 | .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP | |
1494 | DESC_HDR_SEL0_AESU | | |
1495 | DESC_HDR_MODE0_AESU_CBC | | |
1496 | DESC_HDR_SEL1_MDEUA | | |
1497 | DESC_HDR_MODE1_MDEU_INIT | | |
1498 | DESC_HDR_MODE1_MDEU_PAD | | |
1499 | DESC_HDR_MODE1_MDEU_SHA1_HMAC, | |
70bcaca7 LN |
1500 | }, |
1501 | { | |
56af8cd4 LN |
1502 | .alg = { |
1503 | .cra_name = "authenc(hmac(sha1),cbc(des3_ede))", | |
1504 | .cra_driver_name = "authenc-hmac-sha1-cbc-3des-talitos", | |
1505 | .cra_blocksize = DES3_EDE_BLOCK_SIZE, | |
1506 | .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC, | |
1507 | .cra_type = &crypto_aead_type, | |
1508 | .cra_aead = { | |
1509 | .setkey = aead_setkey, | |
1510 | .setauthsize = aead_setauthsize, | |
1511 | .encrypt = aead_encrypt, | |
1512 | .decrypt = aead_decrypt, | |
1513 | .givencrypt = aead_givencrypt, | |
1514 | .geniv = "<built-in>", | |
1515 | .ivsize = DES3_EDE_BLOCK_SIZE, | |
1516 | .maxauthsize = SHA1_DIGEST_SIZE, | |
1517 | } | |
1518 | }, | |
70bcaca7 LN |
1519 | .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP | |
1520 | DESC_HDR_SEL0_DEU | | |
1521 | DESC_HDR_MODE0_DEU_CBC | | |
1522 | DESC_HDR_MODE0_DEU_3DES | | |
1523 | DESC_HDR_SEL1_MDEUA | | |
1524 | DESC_HDR_MODE1_MDEU_INIT | | |
1525 | DESC_HDR_MODE1_MDEU_PAD | | |
1526 | DESC_HDR_MODE1_MDEU_SHA1_HMAC, | |
3952f17e LN |
1527 | }, |
1528 | { | |
56af8cd4 LN |
1529 | .alg = { |
1530 | .cra_name = "authenc(hmac(sha256),cbc(aes))", | |
1531 | .cra_driver_name = "authenc-hmac-sha256-cbc-aes-talitos", | |
1532 | .cra_blocksize = AES_BLOCK_SIZE, | |
1533 | .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC, | |
1534 | .cra_type = &crypto_aead_type, | |
1535 | .cra_aead = { | |
1536 | .setkey = aead_setkey, | |
1537 | .setauthsize = aead_setauthsize, | |
1538 | .encrypt = aead_encrypt, | |
1539 | .decrypt = aead_decrypt, | |
1540 | .givencrypt = aead_givencrypt, | |
1541 | .geniv = "<built-in>", | |
1542 | .ivsize = AES_BLOCK_SIZE, | |
1543 | .maxauthsize = SHA256_DIGEST_SIZE, | |
1544 | } | |
1545 | }, | |
3952f17e LN |
1546 | .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP | |
1547 | DESC_HDR_SEL0_AESU | | |
1548 | DESC_HDR_MODE0_AESU_CBC | | |
1549 | DESC_HDR_SEL1_MDEUA | | |
1550 | DESC_HDR_MODE1_MDEU_INIT | | |
1551 | DESC_HDR_MODE1_MDEU_PAD | | |
1552 | DESC_HDR_MODE1_MDEU_SHA256_HMAC, | |
1553 | }, | |
1554 | { | |
56af8cd4 LN |
1555 | .alg = { |
1556 | .cra_name = "authenc(hmac(sha256),cbc(des3_ede))", | |
1557 | .cra_driver_name = "authenc-hmac-sha256-cbc-3des-talitos", | |
1558 | .cra_blocksize = DES3_EDE_BLOCK_SIZE, | |
1559 | .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC, | |
1560 | .cra_type = &crypto_aead_type, | |
1561 | .cra_aead = { | |
1562 | .setkey = aead_setkey, | |
1563 | .setauthsize = aead_setauthsize, | |
1564 | .encrypt = aead_encrypt, | |
1565 | .decrypt = aead_decrypt, | |
1566 | .givencrypt = aead_givencrypt, | |
1567 | .geniv = "<built-in>", | |
1568 | .ivsize = DES3_EDE_BLOCK_SIZE, | |
1569 | .maxauthsize = SHA256_DIGEST_SIZE, | |
1570 | } | |
1571 | }, | |
3952f17e LN |
1572 | .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP | |
1573 | DESC_HDR_SEL0_DEU | | |
1574 | DESC_HDR_MODE0_DEU_CBC | | |
1575 | DESC_HDR_MODE0_DEU_3DES | | |
1576 | DESC_HDR_SEL1_MDEUA | | |
1577 | DESC_HDR_MODE1_MDEU_INIT | | |
1578 | DESC_HDR_MODE1_MDEU_PAD | | |
1579 | DESC_HDR_MODE1_MDEU_SHA256_HMAC, | |
1580 | }, | |
1581 | { | |
56af8cd4 LN |
1582 | .alg = { |
1583 | .cra_name = "authenc(hmac(md5),cbc(aes))", | |
1584 | .cra_driver_name = "authenc-hmac-md5-cbc-aes-talitos", | |
1585 | .cra_blocksize = AES_BLOCK_SIZE, | |
1586 | .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC, | |
1587 | .cra_type = &crypto_aead_type, | |
1588 | .cra_aead = { | |
1589 | .setkey = aead_setkey, | |
1590 | .setauthsize = aead_setauthsize, | |
1591 | .encrypt = aead_encrypt, | |
1592 | .decrypt = aead_decrypt, | |
1593 | .givencrypt = aead_givencrypt, | |
1594 | .geniv = "<built-in>", | |
1595 | .ivsize = AES_BLOCK_SIZE, | |
1596 | .maxauthsize = MD5_DIGEST_SIZE, | |
1597 | } | |
1598 | }, | |
3952f17e LN |
1599 | .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP | |
1600 | DESC_HDR_SEL0_AESU | | |
1601 | DESC_HDR_MODE0_AESU_CBC | | |
1602 | DESC_HDR_SEL1_MDEUA | | |
1603 | DESC_HDR_MODE1_MDEU_INIT | | |
1604 | DESC_HDR_MODE1_MDEU_PAD | | |
1605 | DESC_HDR_MODE1_MDEU_MD5_HMAC, | |
1606 | }, | |
1607 | { | |
56af8cd4 LN |
1608 | .alg = { |
1609 | .cra_name = "authenc(hmac(md5),cbc(des3_ede))", | |
1610 | .cra_driver_name = "authenc-hmac-md5-cbc-3des-talitos", | |
1611 | .cra_blocksize = DES3_EDE_BLOCK_SIZE, | |
1612 | .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC, | |
1613 | .cra_type = &crypto_aead_type, | |
1614 | .cra_aead = { | |
1615 | .setkey = aead_setkey, | |
1616 | .setauthsize = aead_setauthsize, | |
1617 | .encrypt = aead_encrypt, | |
1618 | .decrypt = aead_decrypt, | |
1619 | .givencrypt = aead_givencrypt, | |
1620 | .geniv = "<built-in>", | |
1621 | .ivsize = DES3_EDE_BLOCK_SIZE, | |
1622 | .maxauthsize = MD5_DIGEST_SIZE, | |
1623 | } | |
1624 | }, | |
3952f17e LN |
1625 | .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP | |
1626 | DESC_HDR_SEL0_DEU | | |
1627 | DESC_HDR_MODE0_DEU_CBC | | |
1628 | DESC_HDR_MODE0_DEU_3DES | | |
1629 | DESC_HDR_SEL1_MDEUA | | |
1630 | DESC_HDR_MODE1_MDEU_INIT | | |
1631 | DESC_HDR_MODE1_MDEU_PAD | | |
1632 | DESC_HDR_MODE1_MDEU_MD5_HMAC, | |
4de9d0b5 LN |
1633 | }, |
1634 | /* ABLKCIPHER algorithms. */ | |
1635 | { | |
1636 | .alg = { | |
1637 | .cra_name = "cbc(aes)", | |
1638 | .cra_driver_name = "cbc-aes-talitos", | |
1639 | .cra_blocksize = AES_BLOCK_SIZE, | |
1640 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | | |
1641 | CRYPTO_ALG_ASYNC, | |
1642 | .cra_type = &crypto_ablkcipher_type, | |
1643 | .cra_ablkcipher = { | |
1644 | .setkey = ablkcipher_setkey, | |
1645 | .encrypt = ablkcipher_encrypt, | |
1646 | .decrypt = ablkcipher_decrypt, | |
1647 | .geniv = "eseqiv", | |
1648 | .min_keysize = AES_MIN_KEY_SIZE, | |
1649 | .max_keysize = AES_MAX_KEY_SIZE, | |
1650 | .ivsize = AES_BLOCK_SIZE, | |
1651 | } | |
1652 | }, | |
1653 | .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU | | |
1654 | DESC_HDR_SEL0_AESU | | |
1655 | DESC_HDR_MODE0_AESU_CBC, | |
1656 | }, | |
1657 | { | |
1658 | .alg = { | |
1659 | .cra_name = "cbc(des3_ede)", | |
1660 | .cra_driver_name = "cbc-3des-talitos", | |
1661 | .cra_blocksize = DES3_EDE_BLOCK_SIZE, | |
1662 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | | |
1663 | CRYPTO_ALG_ASYNC, | |
1664 | .cra_type = &crypto_ablkcipher_type, | |
1665 | .cra_ablkcipher = { | |
1666 | .setkey = ablkcipher_setkey, | |
1667 | .encrypt = ablkcipher_encrypt, | |
1668 | .decrypt = ablkcipher_decrypt, | |
1669 | .geniv = "eseqiv", | |
1670 | .min_keysize = DES3_EDE_KEY_SIZE, | |
1671 | .max_keysize = DES3_EDE_KEY_SIZE, | |
1672 | .ivsize = DES3_EDE_BLOCK_SIZE, | |
1673 | } | |
1674 | }, | |
1675 | .desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU | | |
1676 | DESC_HDR_SEL0_DEU | | |
1677 | DESC_HDR_MODE0_DEU_CBC | | |
1678 | DESC_HDR_MODE0_DEU_3DES, | |
9c4a7965 KP |
1679 | } |
1680 | }; | |
1681 | ||
1682 | struct talitos_crypto_alg { | |
1683 | struct list_head entry; | |
1684 | struct device *dev; | |
1685 | __be32 desc_hdr_template; | |
1686 | struct crypto_alg crypto_alg; | |
1687 | }; | |
1688 | ||
1689 | static int talitos_cra_init(struct crypto_tfm *tfm) | |
1690 | { | |
1691 | struct crypto_alg *alg = tfm->__crt_alg; | |
19bbbc63 | 1692 | struct talitos_crypto_alg *talitos_alg; |
9c4a7965 KP |
1693 | struct talitos_ctx *ctx = crypto_tfm_ctx(tfm); |
1694 | ||
19bbbc63 KP |
1695 | talitos_alg = container_of(alg, struct talitos_crypto_alg, crypto_alg); |
1696 | ||
9c4a7965 KP |
1697 | /* update context with ptr to dev */ |
1698 | ctx->dev = talitos_alg->dev; | |
19bbbc63 | 1699 | |
9c4a7965 KP |
1700 | /* copy descriptor header template value */ |
1701 | ctx->desc_hdr_template = talitos_alg->desc_hdr_template; | |
1702 | ||
1703 | /* random first IV */ | |
70bcaca7 | 1704 | get_random_bytes(ctx->iv, TALITOS_MAX_IV_LENGTH); |
9c4a7965 KP |
1705 | |
1706 | return 0; | |
1707 | } | |
1708 | ||
1709 | /* | |
1710 | * given the alg's descriptor header template, determine whether descriptor | |
1711 | * type and primary/secondary execution units required match the hw | |
1712 | * capabilities description provided in the device tree node. | |
1713 | */ | |
1714 | static int hw_supports(struct device *dev, __be32 desc_hdr_template) | |
1715 | { | |
1716 | struct talitos_private *priv = dev_get_drvdata(dev); | |
1717 | int ret; | |
1718 | ||
1719 | ret = (1 << DESC_TYPE(desc_hdr_template) & priv->desc_types) && | |
1720 | (1 << PRIMARY_EU(desc_hdr_template) & priv->exec_units); | |
1721 | ||
1722 | if (SECONDARY_EU(desc_hdr_template)) | |
1723 | ret = ret && (1 << SECONDARY_EU(desc_hdr_template) | |
1724 | & priv->exec_units); | |
1725 | ||
1726 | return ret; | |
1727 | } | |
1728 | ||
596f1034 | 1729 | static int talitos_remove(struct of_device *ofdev) |
9c4a7965 KP |
1730 | { |
1731 | struct device *dev = &ofdev->dev; | |
1732 | struct talitos_private *priv = dev_get_drvdata(dev); | |
1733 | struct talitos_crypto_alg *t_alg, *n; | |
1734 | int i; | |
1735 | ||
1736 | list_for_each_entry_safe(t_alg, n, &priv->alg_list, entry) { | |
1737 | crypto_unregister_alg(&t_alg->crypto_alg); | |
1738 | list_del(&t_alg->entry); | |
1739 | kfree(t_alg); | |
1740 | } | |
1741 | ||
1742 | if (hw_supports(dev, DESC_HDR_SEL0_RNG)) | |
1743 | talitos_unregister_rng(dev); | |
1744 | ||
ec6644d6 | 1745 | kfree(priv->submit_count); |
9c4a7965 KP |
1746 | kfree(priv->tail); |
1747 | kfree(priv->head); | |
1748 | ||
1749 | if (priv->fifo) | |
1750 | for (i = 0; i < priv->num_channels; i++) | |
1751 | kfree(priv->fifo[i]); | |
1752 | ||
1753 | kfree(priv->fifo); | |
1754 | kfree(priv->head_lock); | |
1755 | kfree(priv->tail_lock); | |
1756 | ||
1757 | if (priv->irq != NO_IRQ) { | |
1758 | free_irq(priv->irq, dev); | |
1759 | irq_dispose_mapping(priv->irq); | |
1760 | } | |
1761 | ||
1762 | tasklet_kill(&priv->done_task); | |
9c4a7965 KP |
1763 | |
1764 | iounmap(priv->reg); | |
1765 | ||
1766 | dev_set_drvdata(dev, NULL); | |
1767 | ||
1768 | kfree(priv); | |
1769 | ||
1770 | return 0; | |
1771 | } | |
1772 | ||
1773 | static struct talitos_crypto_alg *talitos_alg_alloc(struct device *dev, | |
1774 | struct talitos_alg_template | |
1775 | *template) | |
1776 | { | |
1777 | struct talitos_crypto_alg *t_alg; | |
1778 | struct crypto_alg *alg; | |
1779 | ||
1780 | t_alg = kzalloc(sizeof(struct talitos_crypto_alg), GFP_KERNEL); | |
1781 | if (!t_alg) | |
1782 | return ERR_PTR(-ENOMEM); | |
1783 | ||
1784 | alg = &t_alg->crypto_alg; | |
56af8cd4 | 1785 | *alg = template->alg; |
9c4a7965 | 1786 | |
9c4a7965 KP |
1787 | alg->cra_module = THIS_MODULE; |
1788 | alg->cra_init = talitos_cra_init; | |
1789 | alg->cra_priority = TALITOS_CRA_PRIORITY; | |
9c4a7965 | 1790 | alg->cra_alignmask = 0; |
9c4a7965 | 1791 | alg->cra_ctxsize = sizeof(struct talitos_ctx); |
9c4a7965 KP |
1792 | |
1793 | t_alg->desc_hdr_template = template->desc_hdr_template; | |
1794 | t_alg->dev = dev; | |
1795 | ||
1796 | return t_alg; | |
1797 | } | |
1798 | ||
1799 | static int talitos_probe(struct of_device *ofdev, | |
1800 | const struct of_device_id *match) | |
1801 | { | |
1802 | struct device *dev = &ofdev->dev; | |
1803 | struct device_node *np = ofdev->node; | |
1804 | struct talitos_private *priv; | |
1805 | const unsigned int *prop; | |
1806 | int i, err; | |
1807 | ||
1808 | priv = kzalloc(sizeof(struct talitos_private), GFP_KERNEL); | |
1809 | if (!priv) | |
1810 | return -ENOMEM; | |
1811 | ||
1812 | dev_set_drvdata(dev, priv); | |
1813 | ||
1814 | priv->ofdev = ofdev; | |
1815 | ||
1816 | tasklet_init(&priv->done_task, talitos_done, (unsigned long)dev); | |
9c4a7965 | 1817 | |
fe5720e2 KP |
1818 | INIT_LIST_HEAD(&priv->alg_list); |
1819 | ||
9c4a7965 KP |
1820 | priv->irq = irq_of_parse_and_map(np, 0); |
1821 | ||
1822 | if (priv->irq == NO_IRQ) { | |
1823 | dev_err(dev, "failed to map irq\n"); | |
1824 | err = -EINVAL; | |
1825 | goto err_out; | |
1826 | } | |
1827 | ||
1828 | /* get the irq line */ | |
1829 | err = request_irq(priv->irq, talitos_interrupt, 0, | |
1830 | dev_driver_string(dev), dev); | |
1831 | if (err) { | |
1832 | dev_err(dev, "failed to request irq %d\n", priv->irq); | |
1833 | irq_dispose_mapping(priv->irq); | |
1834 | priv->irq = NO_IRQ; | |
1835 | goto err_out; | |
1836 | } | |
1837 | ||
1838 | priv->reg = of_iomap(np, 0); | |
1839 | if (!priv->reg) { | |
1840 | dev_err(dev, "failed to of_iomap\n"); | |
1841 | err = -ENOMEM; | |
1842 | goto err_out; | |
1843 | } | |
1844 | ||
1845 | /* get SEC version capabilities from device tree */ | |
1846 | prop = of_get_property(np, "fsl,num-channels", NULL); | |
1847 | if (prop) | |
1848 | priv->num_channels = *prop; | |
1849 | ||
1850 | prop = of_get_property(np, "fsl,channel-fifo-len", NULL); | |
1851 | if (prop) | |
1852 | priv->chfifo_len = *prop; | |
1853 | ||
1854 | prop = of_get_property(np, "fsl,exec-units-mask", NULL); | |
1855 | if (prop) | |
1856 | priv->exec_units = *prop; | |
1857 | ||
1858 | prop = of_get_property(np, "fsl,descriptor-types-mask", NULL); | |
1859 | if (prop) | |
1860 | priv->desc_types = *prop; | |
1861 | ||
1862 | if (!is_power_of_2(priv->num_channels) || !priv->chfifo_len || | |
1863 | !priv->exec_units || !priv->desc_types) { | |
1864 | dev_err(dev, "invalid property data in device tree node\n"); | |
1865 | err = -EINVAL; | |
1866 | goto err_out; | |
1867 | } | |
1868 | ||
f3c85bc1 LN |
1869 | if (of_device_is_compatible(np, "fsl,sec3.0")) |
1870 | priv->features |= TALITOS_FTR_SRC_LINK_TBL_LEN_INCLUDES_EXTENT; | |
1871 | ||
fe5720e2 KP |
1872 | if (of_device_is_compatible(np, "fsl,sec2.1")) |
1873 | priv->features |= TALITOS_FTR_HW_AUTH_CHECK; | |
1874 | ||
9c4a7965 KP |
1875 | priv->head_lock = kmalloc(sizeof(spinlock_t) * priv->num_channels, |
1876 | GFP_KERNEL); | |
1877 | priv->tail_lock = kmalloc(sizeof(spinlock_t) * priv->num_channels, | |
1878 | GFP_KERNEL); | |
1879 | if (!priv->head_lock || !priv->tail_lock) { | |
1880 | dev_err(dev, "failed to allocate fifo locks\n"); | |
1881 | err = -ENOMEM; | |
1882 | goto err_out; | |
1883 | } | |
1884 | ||
1885 | for (i = 0; i < priv->num_channels; i++) { | |
1886 | spin_lock_init(&priv->head_lock[i]); | |
1887 | spin_lock_init(&priv->tail_lock[i]); | |
1888 | } | |
1889 | ||
1890 | priv->fifo = kmalloc(sizeof(struct talitos_request *) * | |
1891 | priv->num_channels, GFP_KERNEL); | |
1892 | if (!priv->fifo) { | |
1893 | dev_err(dev, "failed to allocate request fifo\n"); | |
1894 | err = -ENOMEM; | |
1895 | goto err_out; | |
1896 | } | |
1897 | ||
1898 | priv->fifo_len = roundup_pow_of_two(priv->chfifo_len); | |
1899 | ||
1900 | for (i = 0; i < priv->num_channels; i++) { | |
1901 | priv->fifo[i] = kzalloc(sizeof(struct talitos_request) * | |
1902 | priv->fifo_len, GFP_KERNEL); | |
1903 | if (!priv->fifo[i]) { | |
1904 | dev_err(dev, "failed to allocate request fifo %d\n", i); | |
1905 | err = -ENOMEM; | |
1906 | goto err_out; | |
1907 | } | |
1908 | } | |
1909 | ||
586725f8 | 1910 | priv->submit_count = kmalloc(sizeof(atomic_t) * priv->num_channels, |
ec6644d6 KP |
1911 | GFP_KERNEL); |
1912 | if (!priv->submit_count) { | |
1913 | dev_err(dev, "failed to allocate fifo submit count space\n"); | |
1914 | err = -ENOMEM; | |
1915 | goto err_out; | |
1916 | } | |
1917 | for (i = 0; i < priv->num_channels; i++) | |
4b24ea97 | 1918 | atomic_set(&priv->submit_count[i], -(priv->chfifo_len - 1)); |
ec6644d6 | 1919 | |
9c4a7965 KP |
1920 | priv->head = kzalloc(sizeof(int) * priv->num_channels, GFP_KERNEL); |
1921 | priv->tail = kzalloc(sizeof(int) * priv->num_channels, GFP_KERNEL); | |
1922 | if (!priv->head || !priv->tail) { | |
1923 | dev_err(dev, "failed to allocate request index space\n"); | |
1924 | err = -ENOMEM; | |
1925 | goto err_out; | |
1926 | } | |
1927 | ||
1928 | /* reset and initialize the h/w */ | |
1929 | err = init_device(dev); | |
1930 | if (err) { | |
1931 | dev_err(dev, "failed to initialize device\n"); | |
1932 | goto err_out; | |
1933 | } | |
1934 | ||
1935 | /* register the RNG, if available */ | |
1936 | if (hw_supports(dev, DESC_HDR_SEL0_RNG)) { | |
1937 | err = talitos_register_rng(dev); | |
1938 | if (err) { | |
1939 | dev_err(dev, "failed to register hwrng: %d\n", err); | |
1940 | goto err_out; | |
1941 | } else | |
1942 | dev_info(dev, "hwrng\n"); | |
1943 | } | |
1944 | ||
1945 | /* register crypto algorithms the device supports */ | |
9c4a7965 KP |
1946 | for (i = 0; i < ARRAY_SIZE(driver_algs); i++) { |
1947 | if (hw_supports(dev, driver_algs[i].desc_hdr_template)) { | |
1948 | struct talitos_crypto_alg *t_alg; | |
1949 | ||
1950 | t_alg = talitos_alg_alloc(dev, &driver_algs[i]); | |
1951 | if (IS_ERR(t_alg)) { | |
1952 | err = PTR_ERR(t_alg); | |
1953 | goto err_out; | |
1954 | } | |
1955 | ||
1956 | err = crypto_register_alg(&t_alg->crypto_alg); | |
1957 | if (err) { | |
1958 | dev_err(dev, "%s alg registration failed\n", | |
1959 | t_alg->crypto_alg.cra_driver_name); | |
1960 | kfree(t_alg); | |
1961 | } else { | |
1962 | list_add_tail(&t_alg->entry, &priv->alg_list); | |
1963 | dev_info(dev, "%s\n", | |
1964 | t_alg->crypto_alg.cra_driver_name); | |
1965 | } | |
1966 | } | |
1967 | } | |
1968 | ||
1969 | return 0; | |
1970 | ||
1971 | err_out: | |
1972 | talitos_remove(ofdev); | |
9c4a7965 KP |
1973 | |
1974 | return err; | |
1975 | } | |
1976 | ||
1977 | static struct of_device_id talitos_match[] = { | |
1978 | { | |
1979 | .compatible = "fsl,sec2.0", | |
1980 | }, | |
1981 | {}, | |
1982 | }; | |
1983 | MODULE_DEVICE_TABLE(of, talitos_match); | |
1984 | ||
1985 | static struct of_platform_driver talitos_driver = { | |
1986 | .name = "talitos", | |
1987 | .match_table = talitos_match, | |
1988 | .probe = talitos_probe, | |
596f1034 | 1989 | .remove = talitos_remove, |
9c4a7965 KP |
1990 | }; |
1991 | ||
1992 | static int __init talitos_init(void) | |
1993 | { | |
1994 | return of_register_platform_driver(&talitos_driver); | |
1995 | } | |
1996 | module_init(talitos_init); | |
1997 | ||
1998 | static void __exit talitos_exit(void) | |
1999 | { | |
2000 | of_unregister_platform_driver(&talitos_driver); | |
2001 | } | |
2002 | module_exit(talitos_exit); | |
2003 | ||
2004 | MODULE_LICENSE("GPL"); | |
2005 | MODULE_AUTHOR("Kim Phillips <kim.phillips@freescale.com>"); | |
2006 | MODULE_DESCRIPTION("Freescale integrated security engine (SEC) driver"); |