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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> | |
47 | ||
48 | #include "talitos.h" | |
49 | ||
50 | #define TALITOS_TIMEOUT 100000 | |
51 | #define TALITOS_MAX_DATA_LEN 65535 | |
52 | ||
53 | #define DESC_TYPE(desc_hdr) ((be32_to_cpu(desc_hdr) >> 3) & 0x1f) | |
54 | #define PRIMARY_EU(desc_hdr) ((be32_to_cpu(desc_hdr) >> 28) & 0xf) | |
55 | #define SECONDARY_EU(desc_hdr) ((be32_to_cpu(desc_hdr) >> 16) & 0xf) | |
56 | ||
57 | /* descriptor pointer entry */ | |
58 | struct talitos_ptr { | |
59 | __be16 len; /* length */ | |
60 | u8 j_extent; /* jump to sg link table and/or extent */ | |
61 | u8 eptr; /* extended address */ | |
62 | __be32 ptr; /* address */ | |
63 | }; | |
64 | ||
65 | /* descriptor */ | |
66 | struct talitos_desc { | |
67 | __be32 hdr; /* header high bits */ | |
68 | __be32 hdr_lo; /* header low bits */ | |
69 | struct talitos_ptr ptr[7]; /* ptr/len pair array */ | |
70 | }; | |
71 | ||
72 | /** | |
73 | * talitos_request - descriptor submission request | |
74 | * @desc: descriptor pointer (kernel virtual) | |
75 | * @dma_desc: descriptor's physical bus address | |
76 | * @callback: whom to call when descriptor processing is done | |
77 | * @context: caller context (optional) | |
78 | */ | |
79 | struct talitos_request { | |
80 | struct talitos_desc *desc; | |
81 | dma_addr_t dma_desc; | |
82 | void (*callback) (struct device *dev, struct talitos_desc *desc, | |
83 | void *context, int error); | |
84 | void *context; | |
85 | }; | |
86 | ||
87 | struct talitos_private { | |
88 | struct device *dev; | |
89 | struct of_device *ofdev; | |
90 | void __iomem *reg; | |
91 | int irq; | |
92 | ||
93 | /* SEC version geometry (from device tree node) */ | |
94 | unsigned int num_channels; | |
95 | unsigned int chfifo_len; | |
96 | unsigned int exec_units; | |
97 | unsigned int desc_types; | |
98 | ||
99 | /* next channel to be assigned next incoming descriptor */ | |
100 | atomic_t last_chan; | |
101 | ||
ec6644d6 KP |
102 | /* per-channel number of requests pending in channel h/w fifo */ |
103 | atomic_t *submit_count; | |
104 | ||
9c4a7965 KP |
105 | /* per-channel request fifo */ |
106 | struct talitos_request **fifo; | |
107 | ||
108 | /* | |
109 | * length of the request fifo | |
110 | * fifo_len is chfifo_len rounded up to next power of 2 | |
111 | * so we can use bitwise ops to wrap | |
112 | */ | |
113 | unsigned int fifo_len; | |
114 | ||
115 | /* per-channel index to next free descriptor request */ | |
116 | int *head; | |
117 | ||
118 | /* per-channel index to next in-progress/done descriptor request */ | |
119 | int *tail; | |
120 | ||
121 | /* per-channel request submission (head) and release (tail) locks */ | |
122 | spinlock_t *head_lock; | |
123 | spinlock_t *tail_lock; | |
124 | ||
125 | /* request callback tasklet */ | |
126 | struct tasklet_struct done_task; | |
127 | struct tasklet_struct error_task; | |
128 | ||
129 | /* list of registered algorithms */ | |
130 | struct list_head alg_list; | |
131 | ||
132 | /* hwrng device */ | |
133 | struct hwrng rng; | |
134 | }; | |
135 | ||
136 | /* | |
137 | * map virtual single (contiguous) pointer to h/w descriptor pointer | |
138 | */ | |
139 | static void map_single_talitos_ptr(struct device *dev, | |
140 | struct talitos_ptr *talitos_ptr, | |
141 | unsigned short len, void *data, | |
142 | unsigned char extent, | |
143 | enum dma_data_direction dir) | |
144 | { | |
145 | talitos_ptr->len = cpu_to_be16(len); | |
146 | talitos_ptr->ptr = cpu_to_be32(dma_map_single(dev, data, len, dir)); | |
147 | talitos_ptr->j_extent = extent; | |
148 | } | |
149 | ||
150 | /* | |
151 | * unmap bus single (contiguous) h/w descriptor pointer | |
152 | */ | |
153 | static void unmap_single_talitos_ptr(struct device *dev, | |
154 | struct talitos_ptr *talitos_ptr, | |
155 | enum dma_data_direction dir) | |
156 | { | |
157 | dma_unmap_single(dev, be32_to_cpu(talitos_ptr->ptr), | |
158 | be16_to_cpu(talitos_ptr->len), dir); | |
159 | } | |
160 | ||
161 | static int reset_channel(struct device *dev, int ch) | |
162 | { | |
163 | struct talitos_private *priv = dev_get_drvdata(dev); | |
164 | unsigned int timeout = TALITOS_TIMEOUT; | |
165 | ||
166 | setbits32(priv->reg + TALITOS_CCCR(ch), TALITOS_CCCR_RESET); | |
167 | ||
168 | while ((in_be32(priv->reg + TALITOS_CCCR(ch)) & TALITOS_CCCR_RESET) | |
169 | && --timeout) | |
170 | cpu_relax(); | |
171 | ||
172 | if (timeout == 0) { | |
173 | dev_err(dev, "failed to reset channel %d\n", ch); | |
174 | return -EIO; | |
175 | } | |
176 | ||
177 | /* set done writeback and IRQ */ | |
178 | setbits32(priv->reg + TALITOS_CCCR_LO(ch), TALITOS_CCCR_LO_CDWE | | |
179 | TALITOS_CCCR_LO_CDIE); | |
180 | ||
181 | return 0; | |
182 | } | |
183 | ||
184 | static int reset_device(struct device *dev) | |
185 | { | |
186 | struct talitos_private *priv = dev_get_drvdata(dev); | |
187 | unsigned int timeout = TALITOS_TIMEOUT; | |
188 | ||
189 | setbits32(priv->reg + TALITOS_MCR, TALITOS_MCR_SWR); | |
190 | ||
191 | while ((in_be32(priv->reg + TALITOS_MCR) & TALITOS_MCR_SWR) | |
192 | && --timeout) | |
193 | cpu_relax(); | |
194 | ||
195 | if (timeout == 0) { | |
196 | dev_err(dev, "failed to reset device\n"); | |
197 | return -EIO; | |
198 | } | |
199 | ||
200 | return 0; | |
201 | } | |
202 | ||
203 | /* | |
204 | * Reset and initialize the device | |
205 | */ | |
206 | static int init_device(struct device *dev) | |
207 | { | |
208 | struct talitos_private *priv = dev_get_drvdata(dev); | |
209 | int ch, err; | |
210 | ||
211 | /* | |
212 | * Master reset | |
213 | * errata documentation: warning: certain SEC interrupts | |
214 | * are not fully cleared by writing the MCR:SWR bit, | |
215 | * set bit twice to completely reset | |
216 | */ | |
217 | err = reset_device(dev); | |
218 | if (err) | |
219 | return err; | |
220 | ||
221 | err = reset_device(dev); | |
222 | if (err) | |
223 | return err; | |
224 | ||
225 | /* reset channels */ | |
226 | for (ch = 0; ch < priv->num_channels; ch++) { | |
227 | err = reset_channel(dev, ch); | |
228 | if (err) | |
229 | return err; | |
230 | } | |
231 | ||
232 | /* enable channel done and error interrupts */ | |
233 | setbits32(priv->reg + TALITOS_IMR, TALITOS_IMR_INIT); | |
234 | setbits32(priv->reg + TALITOS_IMR_LO, TALITOS_IMR_LO_INIT); | |
235 | ||
236 | return 0; | |
237 | } | |
238 | ||
239 | /** | |
240 | * talitos_submit - submits a descriptor to the device for processing | |
241 | * @dev: the SEC device to be used | |
242 | * @desc: the descriptor to be processed by the device | |
243 | * @callback: whom to call when processing is complete | |
244 | * @context: a handle for use by caller (optional) | |
245 | * | |
246 | * desc must contain valid dma-mapped (bus physical) address pointers. | |
247 | * callback must check err and feedback in descriptor header | |
248 | * for device processing status. | |
249 | */ | |
250 | static int talitos_submit(struct device *dev, struct talitos_desc *desc, | |
251 | void (*callback)(struct device *dev, | |
252 | struct talitos_desc *desc, | |
253 | void *context, int error), | |
254 | void *context) | |
255 | { | |
256 | struct talitos_private *priv = dev_get_drvdata(dev); | |
257 | struct talitos_request *request; | |
258 | unsigned long flags, ch; | |
259 | int head; | |
260 | ||
261 | /* select done notification */ | |
262 | desc->hdr |= DESC_HDR_DONE_NOTIFY; | |
263 | ||
264 | /* emulate SEC's round-robin channel fifo polling scheme */ | |
265 | ch = atomic_inc_return(&priv->last_chan) & (priv->num_channels - 1); | |
266 | ||
267 | spin_lock_irqsave(&priv->head_lock[ch], flags); | |
268 | ||
ec6644d6 KP |
269 | if (!atomic_inc_not_zero(&priv->submit_count[ch])) { |
270 | /* h/w fifo is full */ | |
9c4a7965 KP |
271 | spin_unlock_irqrestore(&priv->head_lock[ch], flags); |
272 | return -EAGAIN; | |
273 | } | |
274 | ||
ec6644d6 KP |
275 | head = priv->head[ch]; |
276 | request = &priv->fifo[ch][head]; | |
277 | ||
9c4a7965 KP |
278 | /* map descriptor and save caller data */ |
279 | request->dma_desc = dma_map_single(dev, desc, sizeof(*desc), | |
280 | DMA_BIDIRECTIONAL); | |
281 | request->callback = callback; | |
282 | request->context = context; | |
283 | ||
284 | /* increment fifo head */ | |
285 | priv->head[ch] = (priv->head[ch] + 1) & (priv->fifo_len - 1); | |
286 | ||
287 | smp_wmb(); | |
288 | request->desc = desc; | |
289 | ||
290 | /* GO! */ | |
291 | wmb(); | |
292 | out_be32(priv->reg + TALITOS_FF_LO(ch), request->dma_desc); | |
293 | ||
294 | spin_unlock_irqrestore(&priv->head_lock[ch], flags); | |
295 | ||
296 | return -EINPROGRESS; | |
297 | } | |
298 | ||
299 | /* | |
300 | * process what was done, notify callback of error if not | |
301 | */ | |
302 | static void flush_channel(struct device *dev, int ch, int error, int reset_ch) | |
303 | { | |
304 | struct talitos_private *priv = dev_get_drvdata(dev); | |
305 | struct talitos_request *request, saved_req; | |
306 | unsigned long flags; | |
307 | int tail, status; | |
308 | ||
309 | spin_lock_irqsave(&priv->tail_lock[ch], flags); | |
310 | ||
311 | tail = priv->tail[ch]; | |
312 | while (priv->fifo[ch][tail].desc) { | |
313 | request = &priv->fifo[ch][tail]; | |
314 | ||
315 | /* descriptors with their done bits set don't get the error */ | |
316 | rmb(); | |
317 | if ((request->desc->hdr & DESC_HDR_DONE) == DESC_HDR_DONE) | |
318 | status = 0; | |
319 | else | |
320 | if (!error) | |
321 | break; | |
322 | else | |
323 | status = error; | |
324 | ||
325 | dma_unmap_single(dev, request->dma_desc, | |
326 | sizeof(struct talitos_desc), DMA_BIDIRECTIONAL); | |
327 | ||
328 | /* copy entries so we can call callback outside lock */ | |
329 | saved_req.desc = request->desc; | |
330 | saved_req.callback = request->callback; | |
331 | saved_req.context = request->context; | |
332 | ||
333 | /* release request entry in fifo */ | |
334 | smp_wmb(); | |
335 | request->desc = NULL; | |
336 | ||
337 | /* increment fifo tail */ | |
338 | priv->tail[ch] = (tail + 1) & (priv->fifo_len - 1); | |
339 | ||
340 | spin_unlock_irqrestore(&priv->tail_lock[ch], flags); | |
ec6644d6 KP |
341 | |
342 | atomic_dec(&priv->submit_count[ch]); | |
343 | ||
9c4a7965 KP |
344 | saved_req.callback(dev, saved_req.desc, saved_req.context, |
345 | status); | |
346 | /* channel may resume processing in single desc error case */ | |
347 | if (error && !reset_ch && status == error) | |
348 | return; | |
349 | spin_lock_irqsave(&priv->tail_lock[ch], flags); | |
350 | tail = priv->tail[ch]; | |
351 | } | |
352 | ||
353 | spin_unlock_irqrestore(&priv->tail_lock[ch], flags); | |
354 | } | |
355 | ||
356 | /* | |
357 | * process completed requests for channels that have done status | |
358 | */ | |
359 | static void talitos_done(unsigned long data) | |
360 | { | |
361 | struct device *dev = (struct device *)data; | |
362 | struct talitos_private *priv = dev_get_drvdata(dev); | |
363 | int ch; | |
364 | ||
365 | for (ch = 0; ch < priv->num_channels; ch++) | |
366 | flush_channel(dev, ch, 0, 0); | |
367 | } | |
368 | ||
369 | /* | |
370 | * locate current (offending) descriptor | |
371 | */ | |
372 | static struct talitos_desc *current_desc(struct device *dev, int ch) | |
373 | { | |
374 | struct talitos_private *priv = dev_get_drvdata(dev); | |
375 | int tail = priv->tail[ch]; | |
376 | dma_addr_t cur_desc; | |
377 | ||
378 | cur_desc = in_be32(priv->reg + TALITOS_CDPR_LO(ch)); | |
379 | ||
380 | while (priv->fifo[ch][tail].dma_desc != cur_desc) { | |
381 | tail = (tail + 1) & (priv->fifo_len - 1); | |
382 | if (tail == priv->tail[ch]) { | |
383 | dev_err(dev, "couldn't locate current descriptor\n"); | |
384 | return NULL; | |
385 | } | |
386 | } | |
387 | ||
388 | return priv->fifo[ch][tail].desc; | |
389 | } | |
390 | ||
391 | /* | |
392 | * user diagnostics; report root cause of error based on execution unit status | |
393 | */ | |
394 | static void report_eu_error(struct device *dev, int ch, struct talitos_desc *desc) | |
395 | { | |
396 | struct talitos_private *priv = dev_get_drvdata(dev); | |
397 | int i; | |
398 | ||
399 | switch (desc->hdr & DESC_HDR_SEL0_MASK) { | |
400 | case DESC_HDR_SEL0_AFEU: | |
401 | dev_err(dev, "AFEUISR 0x%08x_%08x\n", | |
402 | in_be32(priv->reg + TALITOS_AFEUISR), | |
403 | in_be32(priv->reg + TALITOS_AFEUISR_LO)); | |
404 | break; | |
405 | case DESC_HDR_SEL0_DEU: | |
406 | dev_err(dev, "DEUISR 0x%08x_%08x\n", | |
407 | in_be32(priv->reg + TALITOS_DEUISR), | |
408 | in_be32(priv->reg + TALITOS_DEUISR_LO)); | |
409 | break; | |
410 | case DESC_HDR_SEL0_MDEUA: | |
411 | case DESC_HDR_SEL0_MDEUB: | |
412 | dev_err(dev, "MDEUISR 0x%08x_%08x\n", | |
413 | in_be32(priv->reg + TALITOS_MDEUISR), | |
414 | in_be32(priv->reg + TALITOS_MDEUISR_LO)); | |
415 | break; | |
416 | case DESC_HDR_SEL0_RNG: | |
417 | dev_err(dev, "RNGUISR 0x%08x_%08x\n", | |
418 | in_be32(priv->reg + TALITOS_RNGUISR), | |
419 | in_be32(priv->reg + TALITOS_RNGUISR_LO)); | |
420 | break; | |
421 | case DESC_HDR_SEL0_PKEU: | |
422 | dev_err(dev, "PKEUISR 0x%08x_%08x\n", | |
423 | in_be32(priv->reg + TALITOS_PKEUISR), | |
424 | in_be32(priv->reg + TALITOS_PKEUISR_LO)); | |
425 | break; | |
426 | case DESC_HDR_SEL0_AESU: | |
427 | dev_err(dev, "AESUISR 0x%08x_%08x\n", | |
428 | in_be32(priv->reg + TALITOS_AESUISR), | |
429 | in_be32(priv->reg + TALITOS_AESUISR_LO)); | |
430 | break; | |
431 | case DESC_HDR_SEL0_CRCU: | |
432 | dev_err(dev, "CRCUISR 0x%08x_%08x\n", | |
433 | in_be32(priv->reg + TALITOS_CRCUISR), | |
434 | in_be32(priv->reg + TALITOS_CRCUISR_LO)); | |
435 | break; | |
436 | case DESC_HDR_SEL0_KEU: | |
437 | dev_err(dev, "KEUISR 0x%08x_%08x\n", | |
438 | in_be32(priv->reg + TALITOS_KEUISR), | |
439 | in_be32(priv->reg + TALITOS_KEUISR_LO)); | |
440 | break; | |
441 | } | |
442 | ||
443 | switch (desc->hdr & DESC_HDR_SEL1_MASK) { | |
444 | case DESC_HDR_SEL1_MDEUA: | |
445 | case DESC_HDR_SEL1_MDEUB: | |
446 | dev_err(dev, "MDEUISR 0x%08x_%08x\n", | |
447 | in_be32(priv->reg + TALITOS_MDEUISR), | |
448 | in_be32(priv->reg + TALITOS_MDEUISR_LO)); | |
449 | break; | |
450 | case DESC_HDR_SEL1_CRCU: | |
451 | dev_err(dev, "CRCUISR 0x%08x_%08x\n", | |
452 | in_be32(priv->reg + TALITOS_CRCUISR), | |
453 | in_be32(priv->reg + TALITOS_CRCUISR_LO)); | |
454 | break; | |
455 | } | |
456 | ||
457 | for (i = 0; i < 8; i++) | |
458 | dev_err(dev, "DESCBUF 0x%08x_%08x\n", | |
459 | in_be32(priv->reg + TALITOS_DESCBUF(ch) + 8*i), | |
460 | in_be32(priv->reg + TALITOS_DESCBUF_LO(ch) + 8*i)); | |
461 | } | |
462 | ||
463 | /* | |
464 | * recover from error interrupts | |
465 | */ | |
466 | static void talitos_error(unsigned long data) | |
467 | { | |
468 | struct device *dev = (struct device *)data; | |
469 | struct talitos_private *priv = dev_get_drvdata(dev); | |
470 | unsigned int timeout = TALITOS_TIMEOUT; | |
471 | int ch, error, reset_dev = 0, reset_ch = 0; | |
472 | u32 isr, isr_lo, v, v_lo; | |
473 | ||
474 | isr = in_be32(priv->reg + TALITOS_ISR); | |
475 | isr_lo = in_be32(priv->reg + TALITOS_ISR_LO); | |
476 | ||
477 | for (ch = 0; ch < priv->num_channels; ch++) { | |
478 | /* skip channels without errors */ | |
479 | if (!(isr & (1 << (ch * 2 + 1)))) | |
480 | continue; | |
481 | ||
482 | error = -EINVAL; | |
483 | ||
484 | v = in_be32(priv->reg + TALITOS_CCPSR(ch)); | |
485 | v_lo = in_be32(priv->reg + TALITOS_CCPSR_LO(ch)); | |
486 | ||
487 | if (v_lo & TALITOS_CCPSR_LO_DOF) { | |
488 | dev_err(dev, "double fetch fifo overflow error\n"); | |
489 | error = -EAGAIN; | |
490 | reset_ch = 1; | |
491 | } | |
492 | if (v_lo & TALITOS_CCPSR_LO_SOF) { | |
493 | /* h/w dropped descriptor */ | |
494 | dev_err(dev, "single fetch fifo overflow error\n"); | |
495 | error = -EAGAIN; | |
496 | } | |
497 | if (v_lo & TALITOS_CCPSR_LO_MDTE) | |
498 | dev_err(dev, "master data transfer error\n"); | |
499 | if (v_lo & TALITOS_CCPSR_LO_SGDLZ) | |
500 | dev_err(dev, "s/g data length zero error\n"); | |
501 | if (v_lo & TALITOS_CCPSR_LO_FPZ) | |
502 | dev_err(dev, "fetch pointer zero error\n"); | |
503 | if (v_lo & TALITOS_CCPSR_LO_IDH) | |
504 | dev_err(dev, "illegal descriptor header error\n"); | |
505 | if (v_lo & TALITOS_CCPSR_LO_IEU) | |
506 | dev_err(dev, "invalid execution unit error\n"); | |
507 | if (v_lo & TALITOS_CCPSR_LO_EU) | |
508 | report_eu_error(dev, ch, current_desc(dev, ch)); | |
509 | if (v_lo & TALITOS_CCPSR_LO_GB) | |
510 | dev_err(dev, "gather boundary error\n"); | |
511 | if (v_lo & TALITOS_CCPSR_LO_GRL) | |
512 | dev_err(dev, "gather return/length error\n"); | |
513 | if (v_lo & TALITOS_CCPSR_LO_SB) | |
514 | dev_err(dev, "scatter boundary error\n"); | |
515 | if (v_lo & TALITOS_CCPSR_LO_SRL) | |
516 | dev_err(dev, "scatter return/length error\n"); | |
517 | ||
518 | flush_channel(dev, ch, error, reset_ch); | |
519 | ||
520 | if (reset_ch) { | |
521 | reset_channel(dev, ch); | |
522 | } else { | |
523 | setbits32(priv->reg + TALITOS_CCCR(ch), | |
524 | TALITOS_CCCR_CONT); | |
525 | setbits32(priv->reg + TALITOS_CCCR_LO(ch), 0); | |
526 | while ((in_be32(priv->reg + TALITOS_CCCR(ch)) & | |
527 | TALITOS_CCCR_CONT) && --timeout) | |
528 | cpu_relax(); | |
529 | if (timeout == 0) { | |
530 | dev_err(dev, "failed to restart channel %d\n", | |
531 | ch); | |
532 | reset_dev = 1; | |
533 | } | |
534 | } | |
535 | } | |
536 | if (reset_dev || isr & ~TALITOS_ISR_CHERR || isr_lo) { | |
537 | dev_err(dev, "done overflow, internal time out, or rngu error: " | |
538 | "ISR 0x%08x_%08x\n", isr, isr_lo); | |
539 | ||
540 | /* purge request queues */ | |
541 | for (ch = 0; ch < priv->num_channels; ch++) | |
542 | flush_channel(dev, ch, -EIO, 1); | |
543 | ||
544 | /* reset and reinitialize the device */ | |
545 | init_device(dev); | |
546 | } | |
547 | } | |
548 | ||
549 | static irqreturn_t talitos_interrupt(int irq, void *data) | |
550 | { | |
551 | struct device *dev = data; | |
552 | struct talitos_private *priv = dev_get_drvdata(dev); | |
553 | u32 isr, isr_lo; | |
554 | ||
555 | isr = in_be32(priv->reg + TALITOS_ISR); | |
556 | isr_lo = in_be32(priv->reg + TALITOS_ISR_LO); | |
557 | ||
558 | /* ack */ | |
559 | out_be32(priv->reg + TALITOS_ICR, isr); | |
560 | out_be32(priv->reg + TALITOS_ICR_LO, isr_lo); | |
561 | ||
562 | if (unlikely((isr & ~TALITOS_ISR_CHDONE) || isr_lo)) | |
563 | talitos_error((unsigned long)data); | |
564 | else | |
565 | if (likely(isr & TALITOS_ISR_CHDONE)) | |
566 | tasklet_schedule(&priv->done_task); | |
567 | ||
568 | return (isr || isr_lo) ? IRQ_HANDLED : IRQ_NONE; | |
569 | } | |
570 | ||
571 | /* | |
572 | * hwrng | |
573 | */ | |
574 | static int talitos_rng_data_present(struct hwrng *rng, int wait) | |
575 | { | |
576 | struct device *dev = (struct device *)rng->priv; | |
577 | struct talitos_private *priv = dev_get_drvdata(dev); | |
578 | u32 ofl; | |
579 | int i; | |
580 | ||
581 | for (i = 0; i < 20; i++) { | |
582 | ofl = in_be32(priv->reg + TALITOS_RNGUSR_LO) & | |
583 | TALITOS_RNGUSR_LO_OFL; | |
584 | if (ofl || !wait) | |
585 | break; | |
586 | udelay(10); | |
587 | } | |
588 | ||
589 | return !!ofl; | |
590 | } | |
591 | ||
592 | static int talitos_rng_data_read(struct hwrng *rng, u32 *data) | |
593 | { | |
594 | struct device *dev = (struct device *)rng->priv; | |
595 | struct talitos_private *priv = dev_get_drvdata(dev); | |
596 | ||
597 | /* rng fifo requires 64-bit accesses */ | |
598 | *data = in_be32(priv->reg + TALITOS_RNGU_FIFO); | |
599 | *data = in_be32(priv->reg + TALITOS_RNGU_FIFO_LO); | |
600 | ||
601 | return sizeof(u32); | |
602 | } | |
603 | ||
604 | static int talitos_rng_init(struct hwrng *rng) | |
605 | { | |
606 | struct device *dev = (struct device *)rng->priv; | |
607 | struct talitos_private *priv = dev_get_drvdata(dev); | |
608 | unsigned int timeout = TALITOS_TIMEOUT; | |
609 | ||
610 | setbits32(priv->reg + TALITOS_RNGURCR_LO, TALITOS_RNGURCR_LO_SR); | |
611 | while (!(in_be32(priv->reg + TALITOS_RNGUSR_LO) & TALITOS_RNGUSR_LO_RD) | |
612 | && --timeout) | |
613 | cpu_relax(); | |
614 | if (timeout == 0) { | |
615 | dev_err(dev, "failed to reset rng hw\n"); | |
616 | return -ENODEV; | |
617 | } | |
618 | ||
619 | /* start generating */ | |
620 | setbits32(priv->reg + TALITOS_RNGUDSR_LO, 0); | |
621 | ||
622 | return 0; | |
623 | } | |
624 | ||
625 | static int talitos_register_rng(struct device *dev) | |
626 | { | |
627 | struct talitos_private *priv = dev_get_drvdata(dev); | |
628 | ||
629 | priv->rng.name = dev_driver_string(dev), | |
630 | priv->rng.init = talitos_rng_init, | |
631 | priv->rng.data_present = talitos_rng_data_present, | |
632 | priv->rng.data_read = talitos_rng_data_read, | |
633 | priv->rng.priv = (unsigned long)dev; | |
634 | ||
635 | return hwrng_register(&priv->rng); | |
636 | } | |
637 | ||
638 | static void talitos_unregister_rng(struct device *dev) | |
639 | { | |
640 | struct talitos_private *priv = dev_get_drvdata(dev); | |
641 | ||
642 | hwrng_unregister(&priv->rng); | |
643 | } | |
644 | ||
645 | /* | |
646 | * crypto alg | |
647 | */ | |
648 | #define TALITOS_CRA_PRIORITY 3000 | |
649 | #define TALITOS_MAX_KEY_SIZE 64 | |
3952f17e | 650 | #define TALITOS_MAX_IV_LENGTH 16 /* max of AES_BLOCK_SIZE, DES3_EDE_BLOCK_SIZE */ |
70bcaca7 | 651 | |
3952f17e | 652 | #define MD5_DIGEST_SIZE 16 |
9c4a7965 KP |
653 | |
654 | struct talitos_ctx { | |
655 | struct device *dev; | |
656 | __be32 desc_hdr_template; | |
657 | u8 key[TALITOS_MAX_KEY_SIZE]; | |
70bcaca7 | 658 | u8 iv[TALITOS_MAX_IV_LENGTH]; |
9c4a7965 KP |
659 | unsigned int keylen; |
660 | unsigned int enckeylen; | |
661 | unsigned int authkeylen; | |
662 | unsigned int authsize; | |
663 | }; | |
664 | ||
70bcaca7 | 665 | static int aead_authenc_setauthsize(struct crypto_aead *authenc, |
9c4a7965 KP |
666 | unsigned int authsize) |
667 | { | |
668 | struct talitos_ctx *ctx = crypto_aead_ctx(authenc); | |
669 | ||
670 | ctx->authsize = authsize; | |
671 | ||
672 | return 0; | |
673 | } | |
674 | ||
70bcaca7 | 675 | static int aead_authenc_setkey(struct crypto_aead *authenc, |
9c4a7965 KP |
676 | const u8 *key, unsigned int keylen) |
677 | { | |
678 | struct talitos_ctx *ctx = crypto_aead_ctx(authenc); | |
679 | struct rtattr *rta = (void *)key; | |
680 | struct crypto_authenc_key_param *param; | |
681 | unsigned int authkeylen; | |
682 | unsigned int enckeylen; | |
683 | ||
684 | if (!RTA_OK(rta, keylen)) | |
685 | goto badkey; | |
686 | ||
687 | if (rta->rta_type != CRYPTO_AUTHENC_KEYA_PARAM) | |
688 | goto badkey; | |
689 | ||
690 | if (RTA_PAYLOAD(rta) < sizeof(*param)) | |
691 | goto badkey; | |
692 | ||
693 | param = RTA_DATA(rta); | |
694 | enckeylen = be32_to_cpu(param->enckeylen); | |
695 | ||
696 | key += RTA_ALIGN(rta->rta_len); | |
697 | keylen -= RTA_ALIGN(rta->rta_len); | |
698 | ||
699 | if (keylen < enckeylen) | |
700 | goto badkey; | |
701 | ||
702 | authkeylen = keylen - enckeylen; | |
703 | ||
704 | if (keylen > TALITOS_MAX_KEY_SIZE) | |
705 | goto badkey; | |
706 | ||
707 | memcpy(&ctx->key, key, keylen); | |
708 | ||
709 | ctx->keylen = keylen; | |
710 | ctx->enckeylen = enckeylen; | |
711 | ctx->authkeylen = authkeylen; | |
712 | ||
713 | return 0; | |
714 | ||
715 | badkey: | |
716 | crypto_aead_set_flags(authenc, CRYPTO_TFM_RES_BAD_KEY_LEN); | |
717 | return -EINVAL; | |
718 | } | |
719 | ||
720 | /* | |
721 | * ipsec_esp_edesc - s/w-extended ipsec_esp descriptor | |
722 | * @src_nents: number of segments in input scatterlist | |
723 | * @dst_nents: number of segments in output scatterlist | |
724 | * @dma_len: length of dma mapped link_tbl space | |
725 | * @dma_link_tbl: bus physical address of link_tbl | |
726 | * @desc: h/w descriptor | |
727 | * @link_tbl: input and output h/w link tables (if {src,dst}_nents > 1) | |
728 | * | |
729 | * if decrypting (with authcheck), or either one of src_nents or dst_nents | |
730 | * is greater than 1, an integrity check value is concatenated to the end | |
731 | * of link_tbl data | |
732 | */ | |
733 | struct ipsec_esp_edesc { | |
734 | int src_nents; | |
735 | int dst_nents; | |
736 | int dma_len; | |
737 | dma_addr_t dma_link_tbl; | |
738 | struct talitos_desc desc; | |
739 | struct talitos_ptr link_tbl[0]; | |
740 | }; | |
741 | ||
742 | static void ipsec_esp_unmap(struct device *dev, | |
743 | struct ipsec_esp_edesc *edesc, | |
744 | struct aead_request *areq) | |
745 | { | |
746 | unmap_single_talitos_ptr(dev, &edesc->desc.ptr[6], DMA_FROM_DEVICE); | |
747 | unmap_single_talitos_ptr(dev, &edesc->desc.ptr[3], DMA_TO_DEVICE); | |
748 | unmap_single_talitos_ptr(dev, &edesc->desc.ptr[2], DMA_TO_DEVICE); | |
749 | unmap_single_talitos_ptr(dev, &edesc->desc.ptr[0], DMA_TO_DEVICE); | |
750 | ||
751 | dma_unmap_sg(dev, areq->assoc, 1, DMA_TO_DEVICE); | |
752 | ||
753 | if (areq->src != areq->dst) { | |
754 | dma_unmap_sg(dev, areq->src, edesc->src_nents ? : 1, | |
755 | DMA_TO_DEVICE); | |
756 | dma_unmap_sg(dev, areq->dst, edesc->dst_nents ? : 1, | |
757 | DMA_FROM_DEVICE); | |
758 | } else { | |
759 | dma_unmap_sg(dev, areq->src, edesc->src_nents ? : 1, | |
760 | DMA_BIDIRECTIONAL); | |
761 | } | |
762 | ||
763 | if (edesc->dma_len) | |
764 | dma_unmap_single(dev, edesc->dma_link_tbl, edesc->dma_len, | |
765 | DMA_BIDIRECTIONAL); | |
766 | } | |
767 | ||
768 | /* | |
769 | * ipsec_esp descriptor callbacks | |
770 | */ | |
771 | static void ipsec_esp_encrypt_done(struct device *dev, | |
772 | struct talitos_desc *desc, void *context, | |
773 | int err) | |
774 | { | |
775 | struct aead_request *areq = context; | |
776 | struct ipsec_esp_edesc *edesc = | |
777 | container_of(desc, struct ipsec_esp_edesc, desc); | |
778 | struct crypto_aead *authenc = crypto_aead_reqtfm(areq); | |
779 | struct talitos_ctx *ctx = crypto_aead_ctx(authenc); | |
780 | struct scatterlist *sg; | |
781 | void *icvdata; | |
782 | ||
783 | ipsec_esp_unmap(dev, edesc, areq); | |
784 | ||
785 | /* copy the generated ICV to dst */ | |
786 | if (edesc->dma_len) { | |
787 | icvdata = &edesc->link_tbl[edesc->src_nents + | |
788 | edesc->dst_nents + 1]; | |
789 | sg = sg_last(areq->dst, edesc->dst_nents); | |
790 | memcpy((char *)sg_virt(sg) + sg->length - ctx->authsize, | |
791 | icvdata, ctx->authsize); | |
792 | } | |
793 | ||
794 | kfree(edesc); | |
795 | ||
796 | aead_request_complete(areq, err); | |
797 | } | |
798 | ||
799 | static void ipsec_esp_decrypt_done(struct device *dev, | |
800 | struct talitos_desc *desc, void *context, | |
801 | int err) | |
802 | { | |
803 | struct aead_request *req = context; | |
804 | struct ipsec_esp_edesc *edesc = | |
805 | container_of(desc, struct ipsec_esp_edesc, desc); | |
806 | struct crypto_aead *authenc = crypto_aead_reqtfm(req); | |
807 | struct talitos_ctx *ctx = crypto_aead_ctx(authenc); | |
808 | struct scatterlist *sg; | |
809 | void *icvdata; | |
810 | ||
811 | ipsec_esp_unmap(dev, edesc, req); | |
812 | ||
813 | if (!err) { | |
814 | /* auth check */ | |
815 | if (edesc->dma_len) | |
816 | icvdata = &edesc->link_tbl[edesc->src_nents + | |
817 | edesc->dst_nents + 1]; | |
818 | else | |
819 | icvdata = &edesc->link_tbl[0]; | |
820 | ||
821 | sg = sg_last(req->dst, edesc->dst_nents ? : 1); | |
822 | err = memcmp(icvdata, (char *)sg_virt(sg) + sg->length - | |
823 | ctx->authsize, ctx->authsize) ? -EBADMSG : 0; | |
824 | } | |
825 | ||
826 | kfree(edesc); | |
827 | ||
828 | aead_request_complete(req, err); | |
829 | } | |
830 | ||
831 | /* | |
832 | * convert scatterlist to SEC h/w link table format | |
833 | * stop at cryptlen bytes | |
834 | */ | |
70bcaca7 | 835 | static int sg_to_link_tbl(struct scatterlist *sg, int sg_count, |
9c4a7965 KP |
836 | int cryptlen, struct talitos_ptr *link_tbl_ptr) |
837 | { | |
70bcaca7 LN |
838 | int n_sg = sg_count; |
839 | ||
840 | while (n_sg--) { | |
9c4a7965 KP |
841 | link_tbl_ptr->ptr = cpu_to_be32(sg_dma_address(sg)); |
842 | link_tbl_ptr->len = cpu_to_be16(sg_dma_len(sg)); | |
843 | link_tbl_ptr->j_extent = 0; | |
844 | link_tbl_ptr++; | |
845 | cryptlen -= sg_dma_len(sg); | |
846 | sg = sg_next(sg); | |
847 | } | |
848 | ||
70bcaca7 | 849 | /* adjust (decrease) last one (or two) entry's len to cryptlen */ |
9c4a7965 | 850 | link_tbl_ptr--; |
c0e741d4 | 851 | while (be16_to_cpu(link_tbl_ptr->len) <= (-cryptlen)) { |
70bcaca7 LN |
852 | /* Empty this entry, and move to previous one */ |
853 | cryptlen += be16_to_cpu(link_tbl_ptr->len); | |
854 | link_tbl_ptr->len = 0; | |
855 | sg_count--; | |
856 | link_tbl_ptr--; | |
857 | } | |
9c4a7965 KP |
858 | link_tbl_ptr->len = cpu_to_be16(be16_to_cpu(link_tbl_ptr->len) |
859 | + cryptlen); | |
860 | ||
861 | /* tag end of link table */ | |
862 | link_tbl_ptr->j_extent = DESC_PTR_LNKTBL_RETURN; | |
70bcaca7 LN |
863 | |
864 | return sg_count; | |
9c4a7965 KP |
865 | } |
866 | ||
867 | /* | |
868 | * fill in and submit ipsec_esp descriptor | |
869 | */ | |
870 | static int ipsec_esp(struct ipsec_esp_edesc *edesc, struct aead_request *areq, | |
871 | u8 *giv, u64 seq, | |
872 | void (*callback) (struct device *dev, | |
873 | struct talitos_desc *desc, | |
874 | void *context, int error)) | |
875 | { | |
876 | struct crypto_aead *aead = crypto_aead_reqtfm(areq); | |
877 | struct talitos_ctx *ctx = crypto_aead_ctx(aead); | |
878 | struct device *dev = ctx->dev; | |
879 | struct talitos_desc *desc = &edesc->desc; | |
880 | unsigned int cryptlen = areq->cryptlen; | |
881 | unsigned int authsize = ctx->authsize; | |
882 | unsigned int ivsize; | |
fa86a267 | 883 | int sg_count, ret; |
9c4a7965 KP |
884 | |
885 | /* hmac key */ | |
886 | map_single_talitos_ptr(dev, &desc->ptr[0], ctx->authkeylen, &ctx->key, | |
887 | 0, DMA_TO_DEVICE); | |
888 | /* hmac data */ | |
889 | map_single_talitos_ptr(dev, &desc->ptr[1], sg_virt(areq->src) - | |
890 | sg_virt(areq->assoc), sg_virt(areq->assoc), 0, | |
891 | DMA_TO_DEVICE); | |
892 | /* cipher iv */ | |
893 | ivsize = crypto_aead_ivsize(aead); | |
894 | map_single_talitos_ptr(dev, &desc->ptr[2], ivsize, giv ?: areq->iv, 0, | |
895 | DMA_TO_DEVICE); | |
896 | ||
897 | /* cipher key */ | |
898 | map_single_talitos_ptr(dev, &desc->ptr[3], ctx->enckeylen, | |
899 | (char *)&ctx->key + ctx->authkeylen, 0, | |
900 | DMA_TO_DEVICE); | |
901 | ||
902 | /* | |
903 | * cipher in | |
904 | * map and adjust cipher len to aead request cryptlen. | |
905 | * extent is bytes of HMAC postpended to ciphertext, | |
906 | * typically 12 for ipsec | |
907 | */ | |
908 | desc->ptr[4].len = cpu_to_be16(cryptlen); | |
909 | desc->ptr[4].j_extent = authsize; | |
910 | ||
911 | if (areq->src == areq->dst) | |
912 | sg_count = dma_map_sg(dev, areq->src, edesc->src_nents ? : 1, | |
913 | DMA_BIDIRECTIONAL); | |
914 | else | |
915 | sg_count = dma_map_sg(dev, areq->src, edesc->src_nents ? : 1, | |
916 | DMA_TO_DEVICE); | |
917 | ||
918 | if (sg_count == 1) { | |
919 | desc->ptr[4].ptr = cpu_to_be32(sg_dma_address(areq->src)); | |
920 | } else { | |
70bcaca7 LN |
921 | sg_count = sg_to_link_tbl(areq->src, sg_count, cryptlen, |
922 | &edesc->link_tbl[0]); | |
923 | if (sg_count > 1) { | |
924 | desc->ptr[4].j_extent |= DESC_PTR_LNKTBL_JUMP; | |
925 | desc->ptr[4].ptr = cpu_to_be32(edesc->dma_link_tbl); | |
926 | dma_sync_single_for_device(ctx->dev, edesc->dma_link_tbl, | |
927 | edesc->dma_len, DMA_BIDIRECTIONAL); | |
928 | } else { | |
929 | /* Only one segment now, so no link tbl needed */ | |
930 | desc->ptr[4].ptr = cpu_to_be32(sg_dma_address(areq->src)); | |
931 | } | |
9c4a7965 KP |
932 | } |
933 | ||
934 | /* cipher out */ | |
935 | desc->ptr[5].len = cpu_to_be16(cryptlen); | |
936 | desc->ptr[5].j_extent = authsize; | |
937 | ||
938 | if (areq->src != areq->dst) { | |
939 | sg_count = dma_map_sg(dev, areq->dst, edesc->dst_nents ? : 1, | |
940 | DMA_FROM_DEVICE); | |
941 | } | |
942 | ||
943 | if (sg_count == 1) { | |
944 | desc->ptr[5].ptr = cpu_to_be32(sg_dma_address(areq->dst)); | |
945 | } else { | |
946 | struct talitos_ptr *link_tbl_ptr = | |
947 | &edesc->link_tbl[edesc->src_nents]; | |
948 | struct scatterlist *sg; | |
949 | ||
950 | desc->ptr[5].ptr = cpu_to_be32((struct talitos_ptr *) | |
951 | edesc->dma_link_tbl + | |
952 | edesc->src_nents); | |
953 | if (areq->src == areq->dst) { | |
954 | memcpy(link_tbl_ptr, &edesc->link_tbl[0], | |
955 | edesc->src_nents * sizeof(struct talitos_ptr)); | |
956 | } else { | |
70bcaca7 LN |
957 | sg_count = sg_to_link_tbl(areq->dst, sg_count, cryptlen, |
958 | link_tbl_ptr); | |
9c4a7965 KP |
959 | } |
960 | link_tbl_ptr += sg_count - 1; | |
961 | ||
962 | /* handle case where sg_last contains the ICV exclusively */ | |
963 | sg = sg_last(areq->dst, edesc->dst_nents); | |
964 | if (sg->length == ctx->authsize) | |
965 | link_tbl_ptr--; | |
966 | ||
967 | link_tbl_ptr->j_extent = 0; | |
968 | link_tbl_ptr++; | |
969 | link_tbl_ptr->j_extent = DESC_PTR_LNKTBL_RETURN; | |
970 | link_tbl_ptr->len = cpu_to_be16(authsize); | |
971 | ||
972 | /* icv data follows link tables */ | |
973 | link_tbl_ptr->ptr = cpu_to_be32((struct talitos_ptr *) | |
974 | edesc->dma_link_tbl + | |
975 | edesc->src_nents + | |
976 | edesc->dst_nents + 1); | |
977 | ||
978 | desc->ptr[5].j_extent |= DESC_PTR_LNKTBL_JUMP; | |
979 | dma_sync_single_for_device(ctx->dev, edesc->dma_link_tbl, | |
980 | edesc->dma_len, DMA_BIDIRECTIONAL); | |
981 | } | |
982 | ||
983 | /* iv out */ | |
984 | map_single_talitos_ptr(dev, &desc->ptr[6], ivsize, ctx->iv, 0, | |
985 | DMA_FROM_DEVICE); | |
986 | ||
fa86a267 KP |
987 | ret = talitos_submit(dev, desc, callback, areq); |
988 | if (ret != -EINPROGRESS) { | |
989 | ipsec_esp_unmap(dev, edesc, areq); | |
990 | kfree(edesc); | |
991 | } | |
992 | return ret; | |
9c4a7965 KP |
993 | } |
994 | ||
995 | ||
996 | /* | |
997 | * derive number of elements in scatterlist | |
998 | */ | |
999 | static int sg_count(struct scatterlist *sg_list, int nbytes) | |
1000 | { | |
1001 | struct scatterlist *sg = sg_list; | |
1002 | int sg_nents = 0; | |
1003 | ||
1004 | while (nbytes) { | |
1005 | sg_nents++; | |
1006 | nbytes -= sg->length; | |
1007 | sg = sg_next(sg); | |
1008 | } | |
1009 | ||
1010 | return sg_nents; | |
1011 | } | |
1012 | ||
1013 | /* | |
1014 | * allocate and map the ipsec_esp extended descriptor | |
1015 | */ | |
1016 | static struct ipsec_esp_edesc *ipsec_esp_edesc_alloc(struct aead_request *areq, | |
1017 | int icv_stashing) | |
1018 | { | |
1019 | struct crypto_aead *authenc = crypto_aead_reqtfm(areq); | |
1020 | struct talitos_ctx *ctx = crypto_aead_ctx(authenc); | |
1021 | struct ipsec_esp_edesc *edesc; | |
1022 | int src_nents, dst_nents, alloc_len, dma_len; | |
586725f8 KP |
1023 | gfp_t flags = areq->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL : |
1024 | GFP_ATOMIC; | |
9c4a7965 KP |
1025 | |
1026 | if (areq->cryptlen + ctx->authsize > TALITOS_MAX_DATA_LEN) { | |
1027 | dev_err(ctx->dev, "cryptlen exceeds h/w max limit\n"); | |
1028 | return ERR_PTR(-EINVAL); | |
1029 | } | |
1030 | ||
1031 | src_nents = sg_count(areq->src, areq->cryptlen + ctx->authsize); | |
1032 | src_nents = (src_nents == 1) ? 0 : src_nents; | |
1033 | ||
1034 | if (areq->dst == areq->src) { | |
1035 | dst_nents = src_nents; | |
1036 | } else { | |
1037 | dst_nents = sg_count(areq->dst, areq->cryptlen + ctx->authsize); | |
695ad589 | 1038 | dst_nents = (dst_nents == 1) ? 0 : dst_nents; |
9c4a7965 KP |
1039 | } |
1040 | ||
1041 | /* | |
1042 | * allocate space for base edesc plus the link tables, | |
1043 | * allowing for a separate entry for the generated ICV (+ 1), | |
1044 | * and the ICV data itself | |
1045 | */ | |
1046 | alloc_len = sizeof(struct ipsec_esp_edesc); | |
1047 | if (src_nents || dst_nents) { | |
1048 | dma_len = (src_nents + dst_nents + 1) * | |
1049 | sizeof(struct talitos_ptr) + ctx->authsize; | |
1050 | alloc_len += dma_len; | |
1051 | } else { | |
1052 | dma_len = 0; | |
1053 | alloc_len += icv_stashing ? ctx->authsize : 0; | |
1054 | } | |
1055 | ||
586725f8 | 1056 | edesc = kmalloc(alloc_len, GFP_DMA | flags); |
9c4a7965 KP |
1057 | if (!edesc) { |
1058 | dev_err(ctx->dev, "could not allocate edescriptor\n"); | |
1059 | return ERR_PTR(-ENOMEM); | |
1060 | } | |
1061 | ||
1062 | edesc->src_nents = src_nents; | |
1063 | edesc->dst_nents = dst_nents; | |
1064 | edesc->dma_len = dma_len; | |
1065 | edesc->dma_link_tbl = dma_map_single(ctx->dev, &edesc->link_tbl[0], | |
1066 | edesc->dma_len, DMA_BIDIRECTIONAL); | |
1067 | ||
1068 | return edesc; | |
1069 | } | |
1070 | ||
70bcaca7 | 1071 | static int aead_authenc_encrypt(struct aead_request *req) |
9c4a7965 KP |
1072 | { |
1073 | struct crypto_aead *authenc = crypto_aead_reqtfm(req); | |
1074 | struct talitos_ctx *ctx = crypto_aead_ctx(authenc); | |
1075 | struct ipsec_esp_edesc *edesc; | |
1076 | ||
1077 | /* allocate extended descriptor */ | |
1078 | edesc = ipsec_esp_edesc_alloc(req, 0); | |
1079 | if (IS_ERR(edesc)) | |
1080 | return PTR_ERR(edesc); | |
1081 | ||
1082 | /* set encrypt */ | |
70bcaca7 | 1083 | edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT; |
9c4a7965 KP |
1084 | |
1085 | return ipsec_esp(edesc, req, NULL, 0, ipsec_esp_encrypt_done); | |
1086 | } | |
1087 | ||
70bcaca7 | 1088 | static int aead_authenc_decrypt(struct aead_request *req) |
9c4a7965 KP |
1089 | { |
1090 | struct crypto_aead *authenc = crypto_aead_reqtfm(req); | |
1091 | struct talitos_ctx *ctx = crypto_aead_ctx(authenc); | |
1092 | unsigned int authsize = ctx->authsize; | |
1093 | struct ipsec_esp_edesc *edesc; | |
1094 | struct scatterlist *sg; | |
1095 | void *icvdata; | |
1096 | ||
1097 | req->cryptlen -= authsize; | |
1098 | ||
1099 | /* allocate extended descriptor */ | |
1100 | edesc = ipsec_esp_edesc_alloc(req, 1); | |
1101 | if (IS_ERR(edesc)) | |
1102 | return PTR_ERR(edesc); | |
1103 | ||
1104 | /* stash incoming ICV for later cmp with ICV generated by the h/w */ | |
1105 | if (edesc->dma_len) | |
1106 | icvdata = &edesc->link_tbl[edesc->src_nents + | |
1107 | edesc->dst_nents + 1]; | |
1108 | else | |
1109 | icvdata = &edesc->link_tbl[0]; | |
1110 | ||
1111 | sg = sg_last(req->src, edesc->src_nents ? : 1); | |
1112 | ||
1113 | memcpy(icvdata, (char *)sg_virt(sg) + sg->length - ctx->authsize, | |
1114 | ctx->authsize); | |
1115 | ||
1116 | /* decrypt */ | |
1117 | edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_DIR_INBOUND; | |
1118 | ||
1119 | return ipsec_esp(edesc, req, NULL, 0, ipsec_esp_decrypt_done); | |
1120 | } | |
1121 | ||
70bcaca7 | 1122 | static int aead_authenc_givencrypt( |
9c4a7965 KP |
1123 | struct aead_givcrypt_request *req) |
1124 | { | |
1125 | struct aead_request *areq = &req->areq; | |
1126 | struct crypto_aead *authenc = crypto_aead_reqtfm(areq); | |
1127 | struct talitos_ctx *ctx = crypto_aead_ctx(authenc); | |
1128 | struct ipsec_esp_edesc *edesc; | |
1129 | ||
1130 | /* allocate extended descriptor */ | |
1131 | edesc = ipsec_esp_edesc_alloc(areq, 0); | |
1132 | if (IS_ERR(edesc)) | |
1133 | return PTR_ERR(edesc); | |
1134 | ||
1135 | /* set encrypt */ | |
70bcaca7 | 1136 | edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT; |
9c4a7965 KP |
1137 | |
1138 | memcpy(req->giv, ctx->iv, crypto_aead_ivsize(authenc)); | |
1139 | ||
1140 | return ipsec_esp(edesc, areq, req->giv, req->seq, | |
1141 | ipsec_esp_encrypt_done); | |
1142 | } | |
1143 | ||
1144 | struct talitos_alg_template { | |
1145 | char name[CRYPTO_MAX_ALG_NAME]; | |
1146 | char driver_name[CRYPTO_MAX_ALG_NAME]; | |
1147 | unsigned int blocksize; | |
1148 | struct aead_alg aead; | |
1149 | struct device *dev; | |
1150 | __be32 desc_hdr_template; | |
1151 | }; | |
1152 | ||
1153 | static struct talitos_alg_template driver_algs[] = { | |
1154 | /* single-pass ipsec_esp descriptor */ | |
1155 | { | |
1156 | .name = "authenc(hmac(sha1),cbc(aes))", | |
ebbcf336 | 1157 | .driver_name = "authenc-hmac-sha1-cbc-aes-talitos", |
3952f17e | 1158 | .blocksize = AES_BLOCK_SIZE, |
9c4a7965 | 1159 | .aead = { |
70bcaca7 LN |
1160 | .setkey = aead_authenc_setkey, |
1161 | .setauthsize = aead_authenc_setauthsize, | |
1162 | .encrypt = aead_authenc_encrypt, | |
1163 | .decrypt = aead_authenc_decrypt, | |
1164 | .givencrypt = aead_authenc_givencrypt, | |
9c4a7965 | 1165 | .geniv = "<built-in>", |
3952f17e LN |
1166 | .ivsize = AES_BLOCK_SIZE, |
1167 | .maxauthsize = SHA1_DIGEST_SIZE, | |
9c4a7965 KP |
1168 | }, |
1169 | .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP | | |
1170 | DESC_HDR_SEL0_AESU | | |
1171 | DESC_HDR_MODE0_AESU_CBC | | |
1172 | DESC_HDR_SEL1_MDEUA | | |
1173 | DESC_HDR_MODE1_MDEU_INIT | | |
1174 | DESC_HDR_MODE1_MDEU_PAD | | |
1175 | DESC_HDR_MODE1_MDEU_SHA1_HMAC, | |
70bcaca7 LN |
1176 | }, |
1177 | { | |
1178 | .name = "authenc(hmac(sha1),cbc(des3_ede))", | |
ebbcf336 | 1179 | .driver_name = "authenc-hmac-sha1-cbc-3des-talitos", |
3952f17e | 1180 | .blocksize = DES3_EDE_BLOCK_SIZE, |
70bcaca7 LN |
1181 | .aead = { |
1182 | .setkey = aead_authenc_setkey, | |
1183 | .setauthsize = aead_authenc_setauthsize, | |
1184 | .encrypt = aead_authenc_encrypt, | |
1185 | .decrypt = aead_authenc_decrypt, | |
1186 | .givencrypt = aead_authenc_givencrypt, | |
1187 | .geniv = "<built-in>", | |
3952f17e LN |
1188 | .ivsize = DES3_EDE_BLOCK_SIZE, |
1189 | .maxauthsize = SHA1_DIGEST_SIZE, | |
70bcaca7 LN |
1190 | }, |
1191 | .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP | | |
1192 | DESC_HDR_SEL0_DEU | | |
1193 | DESC_HDR_MODE0_DEU_CBC | | |
1194 | DESC_HDR_MODE0_DEU_3DES | | |
1195 | DESC_HDR_SEL1_MDEUA | | |
1196 | DESC_HDR_MODE1_MDEU_INIT | | |
1197 | DESC_HDR_MODE1_MDEU_PAD | | |
1198 | DESC_HDR_MODE1_MDEU_SHA1_HMAC, | |
3952f17e LN |
1199 | }, |
1200 | { | |
1201 | .name = "authenc(hmac(sha256),cbc(aes))", | |
1202 | .driver_name = "authenc-hmac-sha256-cbc-aes-talitos", | |
1203 | .blocksize = AES_BLOCK_SIZE, | |
1204 | .aead = { | |
1205 | .setkey = aead_authenc_setkey, | |
1206 | .setauthsize = aead_authenc_setauthsize, | |
1207 | .encrypt = aead_authenc_encrypt, | |
1208 | .decrypt = aead_authenc_decrypt, | |
1209 | .givencrypt = aead_authenc_givencrypt, | |
1210 | .geniv = "<built-in>", | |
1211 | .ivsize = AES_BLOCK_SIZE, | |
1212 | .maxauthsize = SHA256_DIGEST_SIZE, | |
1213 | }, | |
1214 | .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP | | |
1215 | DESC_HDR_SEL0_AESU | | |
1216 | DESC_HDR_MODE0_AESU_CBC | | |
1217 | DESC_HDR_SEL1_MDEUA | | |
1218 | DESC_HDR_MODE1_MDEU_INIT | | |
1219 | DESC_HDR_MODE1_MDEU_PAD | | |
1220 | DESC_HDR_MODE1_MDEU_SHA256_HMAC, | |
1221 | }, | |
1222 | { | |
1223 | .name = "authenc(hmac(sha256),cbc(des3_ede))", | |
1224 | .driver_name = "authenc-hmac-sha256-cbc-3des-talitos", | |
1225 | .blocksize = DES3_EDE_BLOCK_SIZE, | |
1226 | .aead = { | |
1227 | .setkey = aead_authenc_setkey, | |
1228 | .setauthsize = aead_authenc_setauthsize, | |
1229 | .encrypt = aead_authenc_encrypt, | |
1230 | .decrypt = aead_authenc_decrypt, | |
1231 | .givencrypt = aead_authenc_givencrypt, | |
1232 | .geniv = "<built-in>", | |
1233 | .ivsize = DES3_EDE_BLOCK_SIZE, | |
1234 | .maxauthsize = SHA256_DIGEST_SIZE, | |
1235 | }, | |
1236 | .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP | | |
1237 | DESC_HDR_SEL0_DEU | | |
1238 | DESC_HDR_MODE0_DEU_CBC | | |
1239 | DESC_HDR_MODE0_DEU_3DES | | |
1240 | DESC_HDR_SEL1_MDEUA | | |
1241 | DESC_HDR_MODE1_MDEU_INIT | | |
1242 | DESC_HDR_MODE1_MDEU_PAD | | |
1243 | DESC_HDR_MODE1_MDEU_SHA256_HMAC, | |
1244 | }, | |
1245 | { | |
1246 | .name = "authenc(hmac(md5),cbc(aes))", | |
1247 | .driver_name = "authenc-hmac-md5-cbc-aes-talitos", | |
1248 | .blocksize = AES_BLOCK_SIZE, | |
1249 | .aead = { | |
1250 | .setkey = aead_authenc_setkey, | |
1251 | .setauthsize = aead_authenc_setauthsize, | |
1252 | .encrypt = aead_authenc_encrypt, | |
1253 | .decrypt = aead_authenc_decrypt, | |
1254 | .givencrypt = aead_authenc_givencrypt, | |
1255 | .geniv = "<built-in>", | |
1256 | .ivsize = AES_BLOCK_SIZE, | |
1257 | .maxauthsize = MD5_DIGEST_SIZE, | |
1258 | }, | |
1259 | .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP | | |
1260 | DESC_HDR_SEL0_AESU | | |
1261 | DESC_HDR_MODE0_AESU_CBC | | |
1262 | DESC_HDR_SEL1_MDEUA | | |
1263 | DESC_HDR_MODE1_MDEU_INIT | | |
1264 | DESC_HDR_MODE1_MDEU_PAD | | |
1265 | DESC_HDR_MODE1_MDEU_MD5_HMAC, | |
1266 | }, | |
1267 | { | |
1268 | .name = "authenc(hmac(md5),cbc(des3_ede))", | |
1269 | .driver_name = "authenc-hmac-md5-cbc-3des-talitos", | |
1270 | .blocksize = DES3_EDE_BLOCK_SIZE, | |
1271 | .aead = { | |
1272 | .setkey = aead_authenc_setkey, | |
1273 | .setauthsize = aead_authenc_setauthsize, | |
1274 | .encrypt = aead_authenc_encrypt, | |
1275 | .decrypt = aead_authenc_decrypt, | |
1276 | .givencrypt = aead_authenc_givencrypt, | |
1277 | .geniv = "<built-in>", | |
1278 | .ivsize = DES3_EDE_BLOCK_SIZE, | |
1279 | .maxauthsize = MD5_DIGEST_SIZE, | |
1280 | }, | |
1281 | .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP | | |
1282 | DESC_HDR_SEL0_DEU | | |
1283 | DESC_HDR_MODE0_DEU_CBC | | |
1284 | DESC_HDR_MODE0_DEU_3DES | | |
1285 | DESC_HDR_SEL1_MDEUA | | |
1286 | DESC_HDR_MODE1_MDEU_INIT | | |
1287 | DESC_HDR_MODE1_MDEU_PAD | | |
1288 | DESC_HDR_MODE1_MDEU_MD5_HMAC, | |
9c4a7965 KP |
1289 | } |
1290 | }; | |
1291 | ||
1292 | struct talitos_crypto_alg { | |
1293 | struct list_head entry; | |
1294 | struct device *dev; | |
1295 | __be32 desc_hdr_template; | |
1296 | struct crypto_alg crypto_alg; | |
1297 | }; | |
1298 | ||
1299 | static int talitos_cra_init(struct crypto_tfm *tfm) | |
1300 | { | |
1301 | struct crypto_alg *alg = tfm->__crt_alg; | |
1302 | struct talitos_crypto_alg *talitos_alg = | |
1303 | container_of(alg, struct talitos_crypto_alg, crypto_alg); | |
1304 | struct talitos_ctx *ctx = crypto_tfm_ctx(tfm); | |
1305 | ||
1306 | /* update context with ptr to dev */ | |
1307 | ctx->dev = talitos_alg->dev; | |
1308 | /* copy descriptor header template value */ | |
1309 | ctx->desc_hdr_template = talitos_alg->desc_hdr_template; | |
1310 | ||
1311 | /* random first IV */ | |
70bcaca7 | 1312 | get_random_bytes(ctx->iv, TALITOS_MAX_IV_LENGTH); |
9c4a7965 KP |
1313 | |
1314 | return 0; | |
1315 | } | |
1316 | ||
1317 | /* | |
1318 | * given the alg's descriptor header template, determine whether descriptor | |
1319 | * type and primary/secondary execution units required match the hw | |
1320 | * capabilities description provided in the device tree node. | |
1321 | */ | |
1322 | static int hw_supports(struct device *dev, __be32 desc_hdr_template) | |
1323 | { | |
1324 | struct talitos_private *priv = dev_get_drvdata(dev); | |
1325 | int ret; | |
1326 | ||
1327 | ret = (1 << DESC_TYPE(desc_hdr_template) & priv->desc_types) && | |
1328 | (1 << PRIMARY_EU(desc_hdr_template) & priv->exec_units); | |
1329 | ||
1330 | if (SECONDARY_EU(desc_hdr_template)) | |
1331 | ret = ret && (1 << SECONDARY_EU(desc_hdr_template) | |
1332 | & priv->exec_units); | |
1333 | ||
1334 | return ret; | |
1335 | } | |
1336 | ||
1337 | static int __devexit talitos_remove(struct of_device *ofdev) | |
1338 | { | |
1339 | struct device *dev = &ofdev->dev; | |
1340 | struct talitos_private *priv = dev_get_drvdata(dev); | |
1341 | struct talitos_crypto_alg *t_alg, *n; | |
1342 | int i; | |
1343 | ||
1344 | list_for_each_entry_safe(t_alg, n, &priv->alg_list, entry) { | |
1345 | crypto_unregister_alg(&t_alg->crypto_alg); | |
1346 | list_del(&t_alg->entry); | |
1347 | kfree(t_alg); | |
1348 | } | |
1349 | ||
1350 | if (hw_supports(dev, DESC_HDR_SEL0_RNG)) | |
1351 | talitos_unregister_rng(dev); | |
1352 | ||
ec6644d6 | 1353 | kfree(priv->submit_count); |
9c4a7965 KP |
1354 | kfree(priv->tail); |
1355 | kfree(priv->head); | |
1356 | ||
1357 | if (priv->fifo) | |
1358 | for (i = 0; i < priv->num_channels; i++) | |
1359 | kfree(priv->fifo[i]); | |
1360 | ||
1361 | kfree(priv->fifo); | |
1362 | kfree(priv->head_lock); | |
1363 | kfree(priv->tail_lock); | |
1364 | ||
1365 | if (priv->irq != NO_IRQ) { | |
1366 | free_irq(priv->irq, dev); | |
1367 | irq_dispose_mapping(priv->irq); | |
1368 | } | |
1369 | ||
1370 | tasklet_kill(&priv->done_task); | |
1371 | tasklet_kill(&priv->error_task); | |
1372 | ||
1373 | iounmap(priv->reg); | |
1374 | ||
1375 | dev_set_drvdata(dev, NULL); | |
1376 | ||
1377 | kfree(priv); | |
1378 | ||
1379 | return 0; | |
1380 | } | |
1381 | ||
1382 | static struct talitos_crypto_alg *talitos_alg_alloc(struct device *dev, | |
1383 | struct talitos_alg_template | |
1384 | *template) | |
1385 | { | |
1386 | struct talitos_crypto_alg *t_alg; | |
1387 | struct crypto_alg *alg; | |
1388 | ||
1389 | t_alg = kzalloc(sizeof(struct talitos_crypto_alg), GFP_KERNEL); | |
1390 | if (!t_alg) | |
1391 | return ERR_PTR(-ENOMEM); | |
1392 | ||
1393 | alg = &t_alg->crypto_alg; | |
1394 | ||
1395 | snprintf(alg->cra_name, CRYPTO_MAX_ALG_NAME, "%s", template->name); | |
1396 | snprintf(alg->cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s", | |
1397 | template->driver_name); | |
1398 | alg->cra_module = THIS_MODULE; | |
1399 | alg->cra_init = talitos_cra_init; | |
1400 | alg->cra_priority = TALITOS_CRA_PRIORITY; | |
1401 | alg->cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC; | |
1402 | alg->cra_blocksize = template->blocksize; | |
1403 | alg->cra_alignmask = 0; | |
1404 | alg->cra_type = &crypto_aead_type; | |
1405 | alg->cra_ctxsize = sizeof(struct talitos_ctx); | |
1406 | alg->cra_u.aead = template->aead; | |
1407 | ||
1408 | t_alg->desc_hdr_template = template->desc_hdr_template; | |
1409 | t_alg->dev = dev; | |
1410 | ||
1411 | return t_alg; | |
1412 | } | |
1413 | ||
1414 | static int talitos_probe(struct of_device *ofdev, | |
1415 | const struct of_device_id *match) | |
1416 | { | |
1417 | struct device *dev = &ofdev->dev; | |
1418 | struct device_node *np = ofdev->node; | |
1419 | struct talitos_private *priv; | |
1420 | const unsigned int *prop; | |
1421 | int i, err; | |
1422 | ||
1423 | priv = kzalloc(sizeof(struct talitos_private), GFP_KERNEL); | |
1424 | if (!priv) | |
1425 | return -ENOMEM; | |
1426 | ||
1427 | dev_set_drvdata(dev, priv); | |
1428 | ||
1429 | priv->ofdev = ofdev; | |
1430 | ||
1431 | tasklet_init(&priv->done_task, talitos_done, (unsigned long)dev); | |
1432 | tasklet_init(&priv->error_task, talitos_error, (unsigned long)dev); | |
1433 | ||
1434 | priv->irq = irq_of_parse_and_map(np, 0); | |
1435 | ||
1436 | if (priv->irq == NO_IRQ) { | |
1437 | dev_err(dev, "failed to map irq\n"); | |
1438 | err = -EINVAL; | |
1439 | goto err_out; | |
1440 | } | |
1441 | ||
1442 | /* get the irq line */ | |
1443 | err = request_irq(priv->irq, talitos_interrupt, 0, | |
1444 | dev_driver_string(dev), dev); | |
1445 | if (err) { | |
1446 | dev_err(dev, "failed to request irq %d\n", priv->irq); | |
1447 | irq_dispose_mapping(priv->irq); | |
1448 | priv->irq = NO_IRQ; | |
1449 | goto err_out; | |
1450 | } | |
1451 | ||
1452 | priv->reg = of_iomap(np, 0); | |
1453 | if (!priv->reg) { | |
1454 | dev_err(dev, "failed to of_iomap\n"); | |
1455 | err = -ENOMEM; | |
1456 | goto err_out; | |
1457 | } | |
1458 | ||
1459 | /* get SEC version capabilities from device tree */ | |
1460 | prop = of_get_property(np, "fsl,num-channels", NULL); | |
1461 | if (prop) | |
1462 | priv->num_channels = *prop; | |
1463 | ||
1464 | prop = of_get_property(np, "fsl,channel-fifo-len", NULL); | |
1465 | if (prop) | |
1466 | priv->chfifo_len = *prop; | |
1467 | ||
1468 | prop = of_get_property(np, "fsl,exec-units-mask", NULL); | |
1469 | if (prop) | |
1470 | priv->exec_units = *prop; | |
1471 | ||
1472 | prop = of_get_property(np, "fsl,descriptor-types-mask", NULL); | |
1473 | if (prop) | |
1474 | priv->desc_types = *prop; | |
1475 | ||
1476 | if (!is_power_of_2(priv->num_channels) || !priv->chfifo_len || | |
1477 | !priv->exec_units || !priv->desc_types) { | |
1478 | dev_err(dev, "invalid property data in device tree node\n"); | |
1479 | err = -EINVAL; | |
1480 | goto err_out; | |
1481 | } | |
1482 | ||
9c4a7965 KP |
1483 | priv->head_lock = kmalloc(sizeof(spinlock_t) * priv->num_channels, |
1484 | GFP_KERNEL); | |
1485 | priv->tail_lock = kmalloc(sizeof(spinlock_t) * priv->num_channels, | |
1486 | GFP_KERNEL); | |
1487 | if (!priv->head_lock || !priv->tail_lock) { | |
1488 | dev_err(dev, "failed to allocate fifo locks\n"); | |
1489 | err = -ENOMEM; | |
1490 | goto err_out; | |
1491 | } | |
1492 | ||
1493 | for (i = 0; i < priv->num_channels; i++) { | |
1494 | spin_lock_init(&priv->head_lock[i]); | |
1495 | spin_lock_init(&priv->tail_lock[i]); | |
1496 | } | |
1497 | ||
1498 | priv->fifo = kmalloc(sizeof(struct talitos_request *) * | |
1499 | priv->num_channels, GFP_KERNEL); | |
1500 | if (!priv->fifo) { | |
1501 | dev_err(dev, "failed to allocate request fifo\n"); | |
1502 | err = -ENOMEM; | |
1503 | goto err_out; | |
1504 | } | |
1505 | ||
1506 | priv->fifo_len = roundup_pow_of_two(priv->chfifo_len); | |
1507 | ||
1508 | for (i = 0; i < priv->num_channels; i++) { | |
1509 | priv->fifo[i] = kzalloc(sizeof(struct talitos_request) * | |
1510 | priv->fifo_len, GFP_KERNEL); | |
1511 | if (!priv->fifo[i]) { | |
1512 | dev_err(dev, "failed to allocate request fifo %d\n", i); | |
1513 | err = -ENOMEM; | |
1514 | goto err_out; | |
1515 | } | |
1516 | } | |
1517 | ||
586725f8 | 1518 | priv->submit_count = kmalloc(sizeof(atomic_t) * priv->num_channels, |
ec6644d6 KP |
1519 | GFP_KERNEL); |
1520 | if (!priv->submit_count) { | |
1521 | dev_err(dev, "failed to allocate fifo submit count space\n"); | |
1522 | err = -ENOMEM; | |
1523 | goto err_out; | |
1524 | } | |
1525 | for (i = 0; i < priv->num_channels; i++) | |
1526 | atomic_set(&priv->submit_count[i], -priv->chfifo_len); | |
1527 | ||
9c4a7965 KP |
1528 | priv->head = kzalloc(sizeof(int) * priv->num_channels, GFP_KERNEL); |
1529 | priv->tail = kzalloc(sizeof(int) * priv->num_channels, GFP_KERNEL); | |
1530 | if (!priv->head || !priv->tail) { | |
1531 | dev_err(dev, "failed to allocate request index space\n"); | |
1532 | err = -ENOMEM; | |
1533 | goto err_out; | |
1534 | } | |
1535 | ||
1536 | /* reset and initialize the h/w */ | |
1537 | err = init_device(dev); | |
1538 | if (err) { | |
1539 | dev_err(dev, "failed to initialize device\n"); | |
1540 | goto err_out; | |
1541 | } | |
1542 | ||
1543 | /* register the RNG, if available */ | |
1544 | if (hw_supports(dev, DESC_HDR_SEL0_RNG)) { | |
1545 | err = talitos_register_rng(dev); | |
1546 | if (err) { | |
1547 | dev_err(dev, "failed to register hwrng: %d\n", err); | |
1548 | goto err_out; | |
1549 | } else | |
1550 | dev_info(dev, "hwrng\n"); | |
1551 | } | |
1552 | ||
1553 | /* register crypto algorithms the device supports */ | |
1554 | INIT_LIST_HEAD(&priv->alg_list); | |
1555 | ||
1556 | for (i = 0; i < ARRAY_SIZE(driver_algs); i++) { | |
1557 | if (hw_supports(dev, driver_algs[i].desc_hdr_template)) { | |
1558 | struct talitos_crypto_alg *t_alg; | |
1559 | ||
1560 | t_alg = talitos_alg_alloc(dev, &driver_algs[i]); | |
1561 | if (IS_ERR(t_alg)) { | |
1562 | err = PTR_ERR(t_alg); | |
1563 | goto err_out; | |
1564 | } | |
1565 | ||
1566 | err = crypto_register_alg(&t_alg->crypto_alg); | |
1567 | if (err) { | |
1568 | dev_err(dev, "%s alg registration failed\n", | |
1569 | t_alg->crypto_alg.cra_driver_name); | |
1570 | kfree(t_alg); | |
1571 | } else { | |
1572 | list_add_tail(&t_alg->entry, &priv->alg_list); | |
1573 | dev_info(dev, "%s\n", | |
1574 | t_alg->crypto_alg.cra_driver_name); | |
1575 | } | |
1576 | } | |
1577 | } | |
1578 | ||
1579 | return 0; | |
1580 | ||
1581 | err_out: | |
1582 | talitos_remove(ofdev); | |
9c4a7965 KP |
1583 | |
1584 | return err; | |
1585 | } | |
1586 | ||
1587 | static struct of_device_id talitos_match[] = { | |
1588 | { | |
1589 | .compatible = "fsl,sec2.0", | |
1590 | }, | |
1591 | {}, | |
1592 | }; | |
1593 | MODULE_DEVICE_TABLE(of, talitos_match); | |
1594 | ||
1595 | static struct of_platform_driver talitos_driver = { | |
1596 | .name = "talitos", | |
1597 | .match_table = talitos_match, | |
1598 | .probe = talitos_probe, | |
1599 | .remove = __devexit_p(talitos_remove), | |
1600 | }; | |
1601 | ||
1602 | static int __init talitos_init(void) | |
1603 | { | |
1604 | return of_register_platform_driver(&talitos_driver); | |
1605 | } | |
1606 | module_init(talitos_init); | |
1607 | ||
1608 | static void __exit talitos_exit(void) | |
1609 | { | |
1610 | of_unregister_platform_driver(&talitos_driver); | |
1611 | } | |
1612 | module_exit(talitos_exit); | |
1613 | ||
1614 | MODULE_LICENSE("GPL"); | |
1615 | MODULE_AUTHOR("Kim Phillips <kim.phillips@freescale.com>"); | |
1616 | MODULE_DESCRIPTION("Freescale integrated security engine (SEC) driver"); |