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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 | ||
f3c85bc1 LN |
99 | /* SEC Compatibility info */ |
100 | unsigned long features; | |
101 | ||
9c4a7965 KP |
102 | /* next channel to be assigned next incoming descriptor */ |
103 | atomic_t last_chan; | |
104 | ||
ec6644d6 KP |
105 | /* per-channel number of requests pending in channel h/w fifo */ |
106 | atomic_t *submit_count; | |
107 | ||
9c4a7965 KP |
108 | /* per-channel request fifo */ |
109 | struct talitos_request **fifo; | |
110 | ||
111 | /* | |
112 | * length of the request fifo | |
113 | * fifo_len is chfifo_len rounded up to next power of 2 | |
114 | * so we can use bitwise ops to wrap | |
115 | */ | |
116 | unsigned int fifo_len; | |
117 | ||
118 | /* per-channel index to next free descriptor request */ | |
119 | int *head; | |
120 | ||
121 | /* per-channel index to next in-progress/done descriptor request */ | |
122 | int *tail; | |
123 | ||
124 | /* per-channel request submission (head) and release (tail) locks */ | |
125 | spinlock_t *head_lock; | |
126 | spinlock_t *tail_lock; | |
127 | ||
128 | /* request callback tasklet */ | |
129 | struct tasklet_struct done_task; | |
9c4a7965 KP |
130 | |
131 | /* list of registered algorithms */ | |
132 | struct list_head alg_list; | |
133 | ||
134 | /* hwrng device */ | |
135 | struct hwrng rng; | |
136 | }; | |
137 | ||
f3c85bc1 LN |
138 | /* .features flag */ |
139 | #define TALITOS_FTR_SRC_LINK_TBL_LEN_INCLUDES_EXTENT 0x00000001 | |
fe5720e2 | 140 | #define TALITOS_FTR_HW_AUTH_CHECK 0x00000002 |
f3c85bc1 | 141 | |
9c4a7965 KP |
142 | /* |
143 | * map virtual single (contiguous) pointer to h/w descriptor pointer | |
144 | */ | |
145 | static void map_single_talitos_ptr(struct device *dev, | |
146 | struct talitos_ptr *talitos_ptr, | |
147 | unsigned short len, void *data, | |
148 | unsigned char extent, | |
149 | enum dma_data_direction dir) | |
150 | { | |
151 | talitos_ptr->len = cpu_to_be16(len); | |
152 | talitos_ptr->ptr = cpu_to_be32(dma_map_single(dev, data, len, dir)); | |
153 | talitos_ptr->j_extent = extent; | |
154 | } | |
155 | ||
156 | /* | |
157 | * unmap bus single (contiguous) h/w descriptor pointer | |
158 | */ | |
159 | static void unmap_single_talitos_ptr(struct device *dev, | |
160 | struct talitos_ptr *talitos_ptr, | |
161 | enum dma_data_direction dir) | |
162 | { | |
163 | dma_unmap_single(dev, be32_to_cpu(talitos_ptr->ptr), | |
164 | be16_to_cpu(talitos_ptr->len), dir); | |
165 | } | |
166 | ||
167 | static int reset_channel(struct device *dev, int ch) | |
168 | { | |
169 | struct talitos_private *priv = dev_get_drvdata(dev); | |
170 | unsigned int timeout = TALITOS_TIMEOUT; | |
171 | ||
172 | setbits32(priv->reg + TALITOS_CCCR(ch), TALITOS_CCCR_RESET); | |
173 | ||
174 | while ((in_be32(priv->reg + TALITOS_CCCR(ch)) & TALITOS_CCCR_RESET) | |
175 | && --timeout) | |
176 | cpu_relax(); | |
177 | ||
178 | if (timeout == 0) { | |
179 | dev_err(dev, "failed to reset channel %d\n", ch); | |
180 | return -EIO; | |
181 | } | |
182 | ||
183 | /* set done writeback and IRQ */ | |
184 | setbits32(priv->reg + TALITOS_CCCR_LO(ch), TALITOS_CCCR_LO_CDWE | | |
185 | TALITOS_CCCR_LO_CDIE); | |
186 | ||
fe5720e2 KP |
187 | /* and ICCR writeback, if available */ |
188 | if (priv->features & TALITOS_FTR_HW_AUTH_CHECK) | |
189 | setbits32(priv->reg + TALITOS_CCCR_LO(ch), | |
190 | TALITOS_CCCR_LO_IWSE); | |
191 | ||
9c4a7965 KP |
192 | return 0; |
193 | } | |
194 | ||
195 | static int reset_device(struct device *dev) | |
196 | { | |
197 | struct talitos_private *priv = dev_get_drvdata(dev); | |
198 | unsigned int timeout = TALITOS_TIMEOUT; | |
199 | ||
200 | setbits32(priv->reg + TALITOS_MCR, TALITOS_MCR_SWR); | |
201 | ||
202 | while ((in_be32(priv->reg + TALITOS_MCR) & TALITOS_MCR_SWR) | |
203 | && --timeout) | |
204 | cpu_relax(); | |
205 | ||
206 | if (timeout == 0) { | |
207 | dev_err(dev, "failed to reset device\n"); | |
208 | return -EIO; | |
209 | } | |
210 | ||
211 | return 0; | |
212 | } | |
213 | ||
214 | /* | |
215 | * Reset and initialize the device | |
216 | */ | |
217 | static int init_device(struct device *dev) | |
218 | { | |
219 | struct talitos_private *priv = dev_get_drvdata(dev); | |
220 | int ch, err; | |
221 | ||
222 | /* | |
223 | * Master reset | |
224 | * errata documentation: warning: certain SEC interrupts | |
225 | * are not fully cleared by writing the MCR:SWR bit, | |
226 | * set bit twice to completely reset | |
227 | */ | |
228 | err = reset_device(dev); | |
229 | if (err) | |
230 | return err; | |
231 | ||
232 | err = reset_device(dev); | |
233 | if (err) | |
234 | return err; | |
235 | ||
236 | /* reset channels */ | |
237 | for (ch = 0; ch < priv->num_channels; ch++) { | |
238 | err = reset_channel(dev, ch); | |
239 | if (err) | |
240 | return err; | |
241 | } | |
242 | ||
243 | /* enable channel done and error interrupts */ | |
244 | setbits32(priv->reg + TALITOS_IMR, TALITOS_IMR_INIT); | |
245 | setbits32(priv->reg + TALITOS_IMR_LO, TALITOS_IMR_LO_INIT); | |
246 | ||
fe5720e2 KP |
247 | /* disable integrity check error interrupts (use writeback instead) */ |
248 | if (priv->features & TALITOS_FTR_HW_AUTH_CHECK) | |
249 | setbits32(priv->reg + TALITOS_MDEUICR_LO, | |
250 | TALITOS_MDEUICR_LO_ICE); | |
251 | ||
9c4a7965 KP |
252 | return 0; |
253 | } | |
254 | ||
255 | /** | |
256 | * talitos_submit - submits a descriptor to the device for processing | |
257 | * @dev: the SEC device to be used | |
258 | * @desc: the descriptor to be processed by the device | |
259 | * @callback: whom to call when processing is complete | |
260 | * @context: a handle for use by caller (optional) | |
261 | * | |
262 | * desc must contain valid dma-mapped (bus physical) address pointers. | |
263 | * callback must check err and feedback in descriptor header | |
264 | * for device processing status. | |
265 | */ | |
266 | static int talitos_submit(struct device *dev, struct talitos_desc *desc, | |
267 | void (*callback)(struct device *dev, | |
268 | struct talitos_desc *desc, | |
269 | void *context, int error), | |
270 | void *context) | |
271 | { | |
272 | struct talitos_private *priv = dev_get_drvdata(dev); | |
273 | struct talitos_request *request; | |
274 | unsigned long flags, ch; | |
275 | int head; | |
276 | ||
277 | /* select done notification */ | |
278 | desc->hdr |= DESC_HDR_DONE_NOTIFY; | |
279 | ||
280 | /* emulate SEC's round-robin channel fifo polling scheme */ | |
281 | ch = atomic_inc_return(&priv->last_chan) & (priv->num_channels - 1); | |
282 | ||
283 | spin_lock_irqsave(&priv->head_lock[ch], flags); | |
284 | ||
ec6644d6 KP |
285 | if (!atomic_inc_not_zero(&priv->submit_count[ch])) { |
286 | /* h/w fifo is full */ | |
9c4a7965 KP |
287 | spin_unlock_irqrestore(&priv->head_lock[ch], flags); |
288 | return -EAGAIN; | |
289 | } | |
290 | ||
ec6644d6 KP |
291 | head = priv->head[ch]; |
292 | request = &priv->fifo[ch][head]; | |
293 | ||
9c4a7965 KP |
294 | /* map descriptor and save caller data */ |
295 | request->dma_desc = dma_map_single(dev, desc, sizeof(*desc), | |
296 | DMA_BIDIRECTIONAL); | |
297 | request->callback = callback; | |
298 | request->context = context; | |
299 | ||
300 | /* increment fifo head */ | |
301 | priv->head[ch] = (priv->head[ch] + 1) & (priv->fifo_len - 1); | |
302 | ||
303 | smp_wmb(); | |
304 | request->desc = desc; | |
305 | ||
306 | /* GO! */ | |
307 | wmb(); | |
308 | out_be32(priv->reg + TALITOS_FF_LO(ch), request->dma_desc); | |
309 | ||
310 | spin_unlock_irqrestore(&priv->head_lock[ch], flags); | |
311 | ||
312 | return -EINPROGRESS; | |
313 | } | |
314 | ||
315 | /* | |
316 | * process what was done, notify callback of error if not | |
317 | */ | |
318 | static void flush_channel(struct device *dev, int ch, int error, int reset_ch) | |
319 | { | |
320 | struct talitos_private *priv = dev_get_drvdata(dev); | |
321 | struct talitos_request *request, saved_req; | |
322 | unsigned long flags; | |
323 | int tail, status; | |
324 | ||
325 | spin_lock_irqsave(&priv->tail_lock[ch], flags); | |
326 | ||
327 | tail = priv->tail[ch]; | |
328 | while (priv->fifo[ch][tail].desc) { | |
329 | request = &priv->fifo[ch][tail]; | |
330 | ||
331 | /* descriptors with their done bits set don't get the error */ | |
332 | rmb(); | |
ca38a814 | 333 | if ((request->desc->hdr & DESC_HDR_DONE) == DESC_HDR_DONE) |
9c4a7965 | 334 | status = 0; |
ca38a814 | 335 | else |
9c4a7965 KP |
336 | if (!error) |
337 | break; | |
338 | else | |
339 | status = error; | |
340 | ||
341 | dma_unmap_single(dev, request->dma_desc, | |
342 | sizeof(struct talitos_desc), DMA_BIDIRECTIONAL); | |
343 | ||
344 | /* copy entries so we can call callback outside lock */ | |
345 | saved_req.desc = request->desc; | |
346 | saved_req.callback = request->callback; | |
347 | saved_req.context = request->context; | |
348 | ||
349 | /* release request entry in fifo */ | |
350 | smp_wmb(); | |
351 | request->desc = NULL; | |
352 | ||
353 | /* increment fifo tail */ | |
354 | priv->tail[ch] = (tail + 1) & (priv->fifo_len - 1); | |
355 | ||
356 | spin_unlock_irqrestore(&priv->tail_lock[ch], flags); | |
ec6644d6 KP |
357 | |
358 | atomic_dec(&priv->submit_count[ch]); | |
359 | ||
9c4a7965 KP |
360 | saved_req.callback(dev, saved_req.desc, saved_req.context, |
361 | status); | |
362 | /* channel may resume processing in single desc error case */ | |
363 | if (error && !reset_ch && status == error) | |
364 | return; | |
365 | spin_lock_irqsave(&priv->tail_lock[ch], flags); | |
366 | tail = priv->tail[ch]; | |
367 | } | |
368 | ||
369 | spin_unlock_irqrestore(&priv->tail_lock[ch], flags); | |
370 | } | |
371 | ||
372 | /* | |
373 | * process completed requests for channels that have done status | |
374 | */ | |
375 | static void talitos_done(unsigned long data) | |
376 | { | |
377 | struct device *dev = (struct device *)data; | |
378 | struct talitos_private *priv = dev_get_drvdata(dev); | |
379 | int ch; | |
380 | ||
381 | for (ch = 0; ch < priv->num_channels; ch++) | |
382 | flush_channel(dev, ch, 0, 0); | |
1c2e8811 LN |
383 | |
384 | /* At this point, all completed channels have been processed. | |
385 | * Unmask done interrupts for channels completed later on. | |
386 | */ | |
fe5720e2 KP |
387 | setbits32(priv->reg + TALITOS_IMR, TALITOS_IMR_INIT); |
388 | setbits32(priv->reg + TALITOS_IMR_LO, TALITOS_IMR_LO_INIT); | |
9c4a7965 KP |
389 | } |
390 | ||
391 | /* | |
392 | * locate current (offending) descriptor | |
393 | */ | |
394 | static struct talitos_desc *current_desc(struct device *dev, int ch) | |
395 | { | |
396 | struct talitos_private *priv = dev_get_drvdata(dev); | |
397 | int tail = priv->tail[ch]; | |
398 | dma_addr_t cur_desc; | |
399 | ||
400 | cur_desc = in_be32(priv->reg + TALITOS_CDPR_LO(ch)); | |
401 | ||
402 | while (priv->fifo[ch][tail].dma_desc != cur_desc) { | |
403 | tail = (tail + 1) & (priv->fifo_len - 1); | |
404 | if (tail == priv->tail[ch]) { | |
405 | dev_err(dev, "couldn't locate current descriptor\n"); | |
406 | return NULL; | |
407 | } | |
408 | } | |
409 | ||
410 | return priv->fifo[ch][tail].desc; | |
411 | } | |
412 | ||
413 | /* | |
414 | * user diagnostics; report root cause of error based on execution unit status | |
415 | */ | |
416 | static void report_eu_error(struct device *dev, int ch, struct talitos_desc *desc) | |
417 | { | |
418 | struct talitos_private *priv = dev_get_drvdata(dev); | |
419 | int i; | |
420 | ||
421 | switch (desc->hdr & DESC_HDR_SEL0_MASK) { | |
422 | case DESC_HDR_SEL0_AFEU: | |
423 | dev_err(dev, "AFEUISR 0x%08x_%08x\n", | |
424 | in_be32(priv->reg + TALITOS_AFEUISR), | |
425 | in_be32(priv->reg + TALITOS_AFEUISR_LO)); | |
426 | break; | |
427 | case DESC_HDR_SEL0_DEU: | |
428 | dev_err(dev, "DEUISR 0x%08x_%08x\n", | |
429 | in_be32(priv->reg + TALITOS_DEUISR), | |
430 | in_be32(priv->reg + TALITOS_DEUISR_LO)); | |
431 | break; | |
432 | case DESC_HDR_SEL0_MDEUA: | |
433 | case DESC_HDR_SEL0_MDEUB: | |
434 | dev_err(dev, "MDEUISR 0x%08x_%08x\n", | |
435 | in_be32(priv->reg + TALITOS_MDEUISR), | |
436 | in_be32(priv->reg + TALITOS_MDEUISR_LO)); | |
437 | break; | |
438 | case DESC_HDR_SEL0_RNG: | |
439 | dev_err(dev, "RNGUISR 0x%08x_%08x\n", | |
440 | in_be32(priv->reg + TALITOS_RNGUISR), | |
441 | in_be32(priv->reg + TALITOS_RNGUISR_LO)); | |
442 | break; | |
443 | case DESC_HDR_SEL0_PKEU: | |
444 | dev_err(dev, "PKEUISR 0x%08x_%08x\n", | |
445 | in_be32(priv->reg + TALITOS_PKEUISR), | |
446 | in_be32(priv->reg + TALITOS_PKEUISR_LO)); | |
447 | break; | |
448 | case DESC_HDR_SEL0_AESU: | |
449 | dev_err(dev, "AESUISR 0x%08x_%08x\n", | |
450 | in_be32(priv->reg + TALITOS_AESUISR), | |
451 | in_be32(priv->reg + TALITOS_AESUISR_LO)); | |
452 | break; | |
453 | case DESC_HDR_SEL0_CRCU: | |
454 | dev_err(dev, "CRCUISR 0x%08x_%08x\n", | |
455 | in_be32(priv->reg + TALITOS_CRCUISR), | |
456 | in_be32(priv->reg + TALITOS_CRCUISR_LO)); | |
457 | break; | |
458 | case DESC_HDR_SEL0_KEU: | |
459 | dev_err(dev, "KEUISR 0x%08x_%08x\n", | |
460 | in_be32(priv->reg + TALITOS_KEUISR), | |
461 | in_be32(priv->reg + TALITOS_KEUISR_LO)); | |
462 | break; | |
463 | } | |
464 | ||
465 | switch (desc->hdr & DESC_HDR_SEL1_MASK) { | |
466 | case DESC_HDR_SEL1_MDEUA: | |
467 | case DESC_HDR_SEL1_MDEUB: | |
468 | dev_err(dev, "MDEUISR 0x%08x_%08x\n", | |
469 | in_be32(priv->reg + TALITOS_MDEUISR), | |
470 | in_be32(priv->reg + TALITOS_MDEUISR_LO)); | |
471 | break; | |
472 | case DESC_HDR_SEL1_CRCU: | |
473 | dev_err(dev, "CRCUISR 0x%08x_%08x\n", | |
474 | in_be32(priv->reg + TALITOS_CRCUISR), | |
475 | in_be32(priv->reg + TALITOS_CRCUISR_LO)); | |
476 | break; | |
477 | } | |
478 | ||
479 | for (i = 0; i < 8; i++) | |
480 | dev_err(dev, "DESCBUF 0x%08x_%08x\n", | |
481 | in_be32(priv->reg + TALITOS_DESCBUF(ch) + 8*i), | |
482 | in_be32(priv->reg + TALITOS_DESCBUF_LO(ch) + 8*i)); | |
483 | } | |
484 | ||
485 | /* | |
486 | * recover from error interrupts | |
487 | */ | |
40405f10 | 488 | static void talitos_error(unsigned long data, u32 isr, u32 isr_lo) |
9c4a7965 KP |
489 | { |
490 | struct device *dev = (struct device *)data; | |
491 | struct talitos_private *priv = dev_get_drvdata(dev); | |
492 | unsigned int timeout = TALITOS_TIMEOUT; | |
493 | int ch, error, reset_dev = 0, reset_ch = 0; | |
40405f10 | 494 | u32 v, v_lo; |
9c4a7965 KP |
495 | |
496 | for (ch = 0; ch < priv->num_channels; ch++) { | |
497 | /* skip channels without errors */ | |
498 | if (!(isr & (1 << (ch * 2 + 1)))) | |
499 | continue; | |
500 | ||
501 | error = -EINVAL; | |
502 | ||
503 | v = in_be32(priv->reg + TALITOS_CCPSR(ch)); | |
504 | v_lo = in_be32(priv->reg + TALITOS_CCPSR_LO(ch)); | |
505 | ||
506 | if (v_lo & TALITOS_CCPSR_LO_DOF) { | |
507 | dev_err(dev, "double fetch fifo overflow error\n"); | |
508 | error = -EAGAIN; | |
509 | reset_ch = 1; | |
510 | } | |
511 | if (v_lo & TALITOS_CCPSR_LO_SOF) { | |
512 | /* h/w dropped descriptor */ | |
513 | dev_err(dev, "single fetch fifo overflow error\n"); | |
514 | error = -EAGAIN; | |
515 | } | |
516 | if (v_lo & TALITOS_CCPSR_LO_MDTE) | |
517 | dev_err(dev, "master data transfer error\n"); | |
518 | if (v_lo & TALITOS_CCPSR_LO_SGDLZ) | |
519 | dev_err(dev, "s/g data length zero error\n"); | |
520 | if (v_lo & TALITOS_CCPSR_LO_FPZ) | |
521 | dev_err(dev, "fetch pointer zero error\n"); | |
522 | if (v_lo & TALITOS_CCPSR_LO_IDH) | |
523 | dev_err(dev, "illegal descriptor header error\n"); | |
524 | if (v_lo & TALITOS_CCPSR_LO_IEU) | |
525 | dev_err(dev, "invalid execution unit error\n"); | |
526 | if (v_lo & TALITOS_CCPSR_LO_EU) | |
527 | report_eu_error(dev, ch, current_desc(dev, ch)); | |
528 | if (v_lo & TALITOS_CCPSR_LO_GB) | |
529 | dev_err(dev, "gather boundary error\n"); | |
530 | if (v_lo & TALITOS_CCPSR_LO_GRL) | |
531 | dev_err(dev, "gather return/length error\n"); | |
532 | if (v_lo & TALITOS_CCPSR_LO_SB) | |
533 | dev_err(dev, "scatter boundary error\n"); | |
534 | if (v_lo & TALITOS_CCPSR_LO_SRL) | |
535 | dev_err(dev, "scatter return/length error\n"); | |
536 | ||
537 | flush_channel(dev, ch, error, reset_ch); | |
538 | ||
539 | if (reset_ch) { | |
540 | reset_channel(dev, ch); | |
541 | } else { | |
542 | setbits32(priv->reg + TALITOS_CCCR(ch), | |
543 | TALITOS_CCCR_CONT); | |
544 | setbits32(priv->reg + TALITOS_CCCR_LO(ch), 0); | |
545 | while ((in_be32(priv->reg + TALITOS_CCCR(ch)) & | |
546 | TALITOS_CCCR_CONT) && --timeout) | |
547 | cpu_relax(); | |
548 | if (timeout == 0) { | |
549 | dev_err(dev, "failed to restart channel %d\n", | |
550 | ch); | |
551 | reset_dev = 1; | |
552 | } | |
553 | } | |
554 | } | |
555 | if (reset_dev || isr & ~TALITOS_ISR_CHERR || isr_lo) { | |
556 | dev_err(dev, "done overflow, internal time out, or rngu error: " | |
557 | "ISR 0x%08x_%08x\n", isr, isr_lo); | |
558 | ||
559 | /* purge request queues */ | |
560 | for (ch = 0; ch < priv->num_channels; ch++) | |
561 | flush_channel(dev, ch, -EIO, 1); | |
562 | ||
563 | /* reset and reinitialize the device */ | |
564 | init_device(dev); | |
565 | } | |
566 | } | |
567 | ||
568 | static irqreturn_t talitos_interrupt(int irq, void *data) | |
569 | { | |
570 | struct device *dev = data; | |
571 | struct talitos_private *priv = dev_get_drvdata(dev); | |
572 | u32 isr, isr_lo; | |
573 | ||
574 | isr = in_be32(priv->reg + TALITOS_ISR); | |
575 | isr_lo = in_be32(priv->reg + TALITOS_ISR_LO); | |
ca38a814 LN |
576 | /* Acknowledge interrupt */ |
577 | out_be32(priv->reg + TALITOS_ICR, isr); | |
578 | out_be32(priv->reg + TALITOS_ICR_LO, isr_lo); | |
9c4a7965 | 579 | |
ca38a814 | 580 | if (unlikely((isr & ~TALITOS_ISR_CHDONE) || isr_lo)) |
40405f10 | 581 | talitos_error((unsigned long)data, isr, isr_lo); |
ca38a814 | 582 | else |
1c2e8811 LN |
583 | if (likely(isr & TALITOS_ISR_CHDONE)) { |
584 | /* mask further done interrupts. */ | |
585 | clrbits32(priv->reg + TALITOS_IMR, TALITOS_IMR_DONE); | |
586 | /* done_task will unmask done interrupts at exit */ | |
9c4a7965 | 587 | tasklet_schedule(&priv->done_task); |
1c2e8811 | 588 | } |
9c4a7965 KP |
589 | |
590 | return (isr || isr_lo) ? IRQ_HANDLED : IRQ_NONE; | |
591 | } | |
592 | ||
593 | /* | |
594 | * hwrng | |
595 | */ | |
596 | static int talitos_rng_data_present(struct hwrng *rng, int wait) | |
597 | { | |
598 | struct device *dev = (struct device *)rng->priv; | |
599 | struct talitos_private *priv = dev_get_drvdata(dev); | |
600 | u32 ofl; | |
601 | int i; | |
602 | ||
603 | for (i = 0; i < 20; i++) { | |
604 | ofl = in_be32(priv->reg + TALITOS_RNGUSR_LO) & | |
605 | TALITOS_RNGUSR_LO_OFL; | |
606 | if (ofl || !wait) | |
607 | break; | |
608 | udelay(10); | |
609 | } | |
610 | ||
611 | return !!ofl; | |
612 | } | |
613 | ||
614 | static int talitos_rng_data_read(struct hwrng *rng, u32 *data) | |
615 | { | |
616 | struct device *dev = (struct device *)rng->priv; | |
617 | struct talitos_private *priv = dev_get_drvdata(dev); | |
618 | ||
619 | /* rng fifo requires 64-bit accesses */ | |
620 | *data = in_be32(priv->reg + TALITOS_RNGU_FIFO); | |
621 | *data = in_be32(priv->reg + TALITOS_RNGU_FIFO_LO); | |
622 | ||
623 | return sizeof(u32); | |
624 | } | |
625 | ||
626 | static int talitos_rng_init(struct hwrng *rng) | |
627 | { | |
628 | struct device *dev = (struct device *)rng->priv; | |
629 | struct talitos_private *priv = dev_get_drvdata(dev); | |
630 | unsigned int timeout = TALITOS_TIMEOUT; | |
631 | ||
632 | setbits32(priv->reg + TALITOS_RNGURCR_LO, TALITOS_RNGURCR_LO_SR); | |
633 | while (!(in_be32(priv->reg + TALITOS_RNGUSR_LO) & TALITOS_RNGUSR_LO_RD) | |
634 | && --timeout) | |
635 | cpu_relax(); | |
636 | if (timeout == 0) { | |
637 | dev_err(dev, "failed to reset rng hw\n"); | |
638 | return -ENODEV; | |
639 | } | |
640 | ||
641 | /* start generating */ | |
642 | setbits32(priv->reg + TALITOS_RNGUDSR_LO, 0); | |
643 | ||
644 | return 0; | |
645 | } | |
646 | ||
647 | static int talitos_register_rng(struct device *dev) | |
648 | { | |
649 | struct talitos_private *priv = dev_get_drvdata(dev); | |
650 | ||
651 | priv->rng.name = dev_driver_string(dev), | |
652 | priv->rng.init = talitos_rng_init, | |
653 | priv->rng.data_present = talitos_rng_data_present, | |
654 | priv->rng.data_read = talitos_rng_data_read, | |
655 | priv->rng.priv = (unsigned long)dev; | |
656 | ||
657 | return hwrng_register(&priv->rng); | |
658 | } | |
659 | ||
660 | static void talitos_unregister_rng(struct device *dev) | |
661 | { | |
662 | struct talitos_private *priv = dev_get_drvdata(dev); | |
663 | ||
664 | hwrng_unregister(&priv->rng); | |
665 | } | |
666 | ||
667 | /* | |
668 | * crypto alg | |
669 | */ | |
670 | #define TALITOS_CRA_PRIORITY 3000 | |
671 | #define TALITOS_MAX_KEY_SIZE 64 | |
3952f17e | 672 | #define TALITOS_MAX_IV_LENGTH 16 /* max of AES_BLOCK_SIZE, DES3_EDE_BLOCK_SIZE */ |
70bcaca7 | 673 | |
3952f17e | 674 | #define MD5_DIGEST_SIZE 16 |
9c4a7965 KP |
675 | |
676 | struct talitos_ctx { | |
677 | struct device *dev; | |
678 | __be32 desc_hdr_template; | |
679 | u8 key[TALITOS_MAX_KEY_SIZE]; | |
70bcaca7 | 680 | u8 iv[TALITOS_MAX_IV_LENGTH]; |
9c4a7965 KP |
681 | unsigned int keylen; |
682 | unsigned int enckeylen; | |
683 | unsigned int authkeylen; | |
684 | unsigned int authsize; | |
685 | }; | |
686 | ||
70bcaca7 | 687 | static int aead_authenc_setauthsize(struct crypto_aead *authenc, |
9c4a7965 KP |
688 | unsigned int authsize) |
689 | { | |
690 | struct talitos_ctx *ctx = crypto_aead_ctx(authenc); | |
691 | ||
692 | ctx->authsize = authsize; | |
693 | ||
694 | return 0; | |
695 | } | |
696 | ||
70bcaca7 | 697 | static int aead_authenc_setkey(struct crypto_aead *authenc, |
9c4a7965 KP |
698 | const u8 *key, unsigned int keylen) |
699 | { | |
700 | struct talitos_ctx *ctx = crypto_aead_ctx(authenc); | |
701 | struct rtattr *rta = (void *)key; | |
702 | struct crypto_authenc_key_param *param; | |
703 | unsigned int authkeylen; | |
704 | unsigned int enckeylen; | |
705 | ||
706 | if (!RTA_OK(rta, keylen)) | |
707 | goto badkey; | |
708 | ||
709 | if (rta->rta_type != CRYPTO_AUTHENC_KEYA_PARAM) | |
710 | goto badkey; | |
711 | ||
712 | if (RTA_PAYLOAD(rta) < sizeof(*param)) | |
713 | goto badkey; | |
714 | ||
715 | param = RTA_DATA(rta); | |
716 | enckeylen = be32_to_cpu(param->enckeylen); | |
717 | ||
718 | key += RTA_ALIGN(rta->rta_len); | |
719 | keylen -= RTA_ALIGN(rta->rta_len); | |
720 | ||
721 | if (keylen < enckeylen) | |
722 | goto badkey; | |
723 | ||
724 | authkeylen = keylen - enckeylen; | |
725 | ||
726 | if (keylen > TALITOS_MAX_KEY_SIZE) | |
727 | goto badkey; | |
728 | ||
729 | memcpy(&ctx->key, key, keylen); | |
730 | ||
731 | ctx->keylen = keylen; | |
732 | ctx->enckeylen = enckeylen; | |
733 | ctx->authkeylen = authkeylen; | |
734 | ||
735 | return 0; | |
736 | ||
737 | badkey: | |
738 | crypto_aead_set_flags(authenc, CRYPTO_TFM_RES_BAD_KEY_LEN); | |
739 | return -EINVAL; | |
740 | } | |
741 | ||
742 | /* | |
743 | * ipsec_esp_edesc - s/w-extended ipsec_esp descriptor | |
744 | * @src_nents: number of segments in input scatterlist | |
745 | * @dst_nents: number of segments in output scatterlist | |
746 | * @dma_len: length of dma mapped link_tbl space | |
747 | * @dma_link_tbl: bus physical address of link_tbl | |
748 | * @desc: h/w descriptor | |
749 | * @link_tbl: input and output h/w link tables (if {src,dst}_nents > 1) | |
750 | * | |
751 | * if decrypting (with authcheck), or either one of src_nents or dst_nents | |
752 | * is greater than 1, an integrity check value is concatenated to the end | |
753 | * of link_tbl data | |
754 | */ | |
755 | struct ipsec_esp_edesc { | |
756 | int src_nents; | |
757 | int dst_nents; | |
758 | int dma_len; | |
759 | dma_addr_t dma_link_tbl; | |
760 | struct talitos_desc desc; | |
761 | struct talitos_ptr link_tbl[0]; | |
762 | }; | |
763 | ||
764 | static void ipsec_esp_unmap(struct device *dev, | |
765 | struct ipsec_esp_edesc *edesc, | |
766 | struct aead_request *areq) | |
767 | { | |
768 | unmap_single_talitos_ptr(dev, &edesc->desc.ptr[6], DMA_FROM_DEVICE); | |
769 | unmap_single_talitos_ptr(dev, &edesc->desc.ptr[3], DMA_TO_DEVICE); | |
770 | unmap_single_talitos_ptr(dev, &edesc->desc.ptr[2], DMA_TO_DEVICE); | |
771 | unmap_single_talitos_ptr(dev, &edesc->desc.ptr[0], DMA_TO_DEVICE); | |
772 | ||
773 | dma_unmap_sg(dev, areq->assoc, 1, DMA_TO_DEVICE); | |
774 | ||
775 | if (areq->src != areq->dst) { | |
776 | dma_unmap_sg(dev, areq->src, edesc->src_nents ? : 1, | |
777 | DMA_TO_DEVICE); | |
778 | dma_unmap_sg(dev, areq->dst, edesc->dst_nents ? : 1, | |
779 | DMA_FROM_DEVICE); | |
780 | } else { | |
781 | dma_unmap_sg(dev, areq->src, edesc->src_nents ? : 1, | |
782 | DMA_BIDIRECTIONAL); | |
783 | } | |
784 | ||
785 | if (edesc->dma_len) | |
786 | dma_unmap_single(dev, edesc->dma_link_tbl, edesc->dma_len, | |
787 | DMA_BIDIRECTIONAL); | |
788 | } | |
789 | ||
790 | /* | |
791 | * ipsec_esp descriptor callbacks | |
792 | */ | |
793 | static void ipsec_esp_encrypt_done(struct device *dev, | |
794 | struct talitos_desc *desc, void *context, | |
795 | int err) | |
796 | { | |
797 | struct aead_request *areq = context; | |
798 | struct ipsec_esp_edesc *edesc = | |
799 | container_of(desc, struct ipsec_esp_edesc, desc); | |
800 | struct crypto_aead *authenc = crypto_aead_reqtfm(areq); | |
801 | struct talitos_ctx *ctx = crypto_aead_ctx(authenc); | |
802 | struct scatterlist *sg; | |
803 | void *icvdata; | |
804 | ||
805 | ipsec_esp_unmap(dev, edesc, areq); | |
806 | ||
807 | /* copy the generated ICV to dst */ | |
808 | if (edesc->dma_len) { | |
809 | icvdata = &edesc->link_tbl[edesc->src_nents + | |
f3c85bc1 | 810 | edesc->dst_nents + 2]; |
9c4a7965 KP |
811 | sg = sg_last(areq->dst, edesc->dst_nents); |
812 | memcpy((char *)sg_virt(sg) + sg->length - ctx->authsize, | |
813 | icvdata, ctx->authsize); | |
814 | } | |
815 | ||
816 | kfree(edesc); | |
817 | ||
818 | aead_request_complete(areq, err); | |
819 | } | |
820 | ||
fe5720e2 | 821 | static void ipsec_esp_decrypt_swauth_done(struct device *dev, |
9c4a7965 KP |
822 | struct talitos_desc *desc, void *context, |
823 | int err) | |
824 | { | |
825 | struct aead_request *req = context; | |
826 | struct ipsec_esp_edesc *edesc = | |
827 | container_of(desc, struct ipsec_esp_edesc, desc); | |
828 | struct crypto_aead *authenc = crypto_aead_reqtfm(req); | |
829 | struct talitos_ctx *ctx = crypto_aead_ctx(authenc); | |
830 | struct scatterlist *sg; | |
831 | void *icvdata; | |
832 | ||
833 | ipsec_esp_unmap(dev, edesc, req); | |
834 | ||
835 | if (!err) { | |
836 | /* auth check */ | |
837 | if (edesc->dma_len) | |
838 | icvdata = &edesc->link_tbl[edesc->src_nents + | |
f3c85bc1 | 839 | edesc->dst_nents + 2]; |
9c4a7965 KP |
840 | else |
841 | icvdata = &edesc->link_tbl[0]; | |
842 | ||
843 | sg = sg_last(req->dst, edesc->dst_nents ? : 1); | |
844 | err = memcmp(icvdata, (char *)sg_virt(sg) + sg->length - | |
845 | ctx->authsize, ctx->authsize) ? -EBADMSG : 0; | |
846 | } | |
847 | ||
848 | kfree(edesc); | |
849 | ||
850 | aead_request_complete(req, err); | |
851 | } | |
852 | ||
fe5720e2 KP |
853 | static void ipsec_esp_decrypt_hwauth_done(struct device *dev, |
854 | struct talitos_desc *desc, void *context, | |
855 | int err) | |
856 | { | |
857 | struct aead_request *req = context; | |
858 | struct ipsec_esp_edesc *edesc = | |
859 | container_of(desc, struct ipsec_esp_edesc, desc); | |
860 | ||
861 | ipsec_esp_unmap(dev, edesc, req); | |
862 | ||
863 | /* check ICV auth status */ | |
864 | if (!err) | |
865 | if ((desc->hdr_lo & DESC_HDR_LO_ICCR1_MASK) != | |
866 | DESC_HDR_LO_ICCR1_PASS) | |
867 | err = -EBADMSG; | |
868 | ||
869 | kfree(edesc); | |
870 | ||
871 | aead_request_complete(req, err); | |
872 | } | |
873 | ||
9c4a7965 KP |
874 | /* |
875 | * convert scatterlist to SEC h/w link table format | |
876 | * stop at cryptlen bytes | |
877 | */ | |
70bcaca7 | 878 | static int sg_to_link_tbl(struct scatterlist *sg, int sg_count, |
9c4a7965 KP |
879 | int cryptlen, struct talitos_ptr *link_tbl_ptr) |
880 | { | |
70bcaca7 LN |
881 | int n_sg = sg_count; |
882 | ||
883 | while (n_sg--) { | |
9c4a7965 KP |
884 | link_tbl_ptr->ptr = cpu_to_be32(sg_dma_address(sg)); |
885 | link_tbl_ptr->len = cpu_to_be16(sg_dma_len(sg)); | |
886 | link_tbl_ptr->j_extent = 0; | |
887 | link_tbl_ptr++; | |
888 | cryptlen -= sg_dma_len(sg); | |
889 | sg = sg_next(sg); | |
890 | } | |
891 | ||
70bcaca7 | 892 | /* adjust (decrease) last one (or two) entry's len to cryptlen */ |
9c4a7965 | 893 | link_tbl_ptr--; |
c0e741d4 | 894 | while (be16_to_cpu(link_tbl_ptr->len) <= (-cryptlen)) { |
70bcaca7 LN |
895 | /* Empty this entry, and move to previous one */ |
896 | cryptlen += be16_to_cpu(link_tbl_ptr->len); | |
897 | link_tbl_ptr->len = 0; | |
898 | sg_count--; | |
899 | link_tbl_ptr--; | |
900 | } | |
9c4a7965 KP |
901 | link_tbl_ptr->len = cpu_to_be16(be16_to_cpu(link_tbl_ptr->len) |
902 | + cryptlen); | |
903 | ||
904 | /* tag end of link table */ | |
905 | link_tbl_ptr->j_extent = DESC_PTR_LNKTBL_RETURN; | |
70bcaca7 LN |
906 | |
907 | return sg_count; | |
9c4a7965 KP |
908 | } |
909 | ||
910 | /* | |
911 | * fill in and submit ipsec_esp descriptor | |
912 | */ | |
913 | static int ipsec_esp(struct ipsec_esp_edesc *edesc, struct aead_request *areq, | |
914 | u8 *giv, u64 seq, | |
915 | void (*callback) (struct device *dev, | |
916 | struct talitos_desc *desc, | |
917 | void *context, int error)) | |
918 | { | |
919 | struct crypto_aead *aead = crypto_aead_reqtfm(areq); | |
920 | struct talitos_ctx *ctx = crypto_aead_ctx(aead); | |
921 | struct device *dev = ctx->dev; | |
922 | struct talitos_desc *desc = &edesc->desc; | |
923 | unsigned int cryptlen = areq->cryptlen; | |
924 | unsigned int authsize = ctx->authsize; | |
925 | unsigned int ivsize; | |
fa86a267 | 926 | int sg_count, ret; |
fe5720e2 | 927 | int sg_link_tbl_len; |
9c4a7965 KP |
928 | |
929 | /* hmac key */ | |
930 | map_single_talitos_ptr(dev, &desc->ptr[0], ctx->authkeylen, &ctx->key, | |
931 | 0, DMA_TO_DEVICE); | |
932 | /* hmac data */ | |
933 | map_single_talitos_ptr(dev, &desc->ptr[1], sg_virt(areq->src) - | |
934 | sg_virt(areq->assoc), sg_virt(areq->assoc), 0, | |
935 | DMA_TO_DEVICE); | |
936 | /* cipher iv */ | |
937 | ivsize = crypto_aead_ivsize(aead); | |
938 | map_single_talitos_ptr(dev, &desc->ptr[2], ivsize, giv ?: areq->iv, 0, | |
939 | DMA_TO_DEVICE); | |
940 | ||
941 | /* cipher key */ | |
942 | map_single_talitos_ptr(dev, &desc->ptr[3], ctx->enckeylen, | |
943 | (char *)&ctx->key + ctx->authkeylen, 0, | |
944 | DMA_TO_DEVICE); | |
945 | ||
946 | /* | |
947 | * cipher in | |
948 | * map and adjust cipher len to aead request cryptlen. | |
949 | * extent is bytes of HMAC postpended to ciphertext, | |
950 | * typically 12 for ipsec | |
951 | */ | |
952 | desc->ptr[4].len = cpu_to_be16(cryptlen); | |
953 | desc->ptr[4].j_extent = authsize; | |
954 | ||
955 | if (areq->src == areq->dst) | |
956 | sg_count = dma_map_sg(dev, areq->src, edesc->src_nents ? : 1, | |
957 | DMA_BIDIRECTIONAL); | |
958 | else | |
959 | sg_count = dma_map_sg(dev, areq->src, edesc->src_nents ? : 1, | |
960 | DMA_TO_DEVICE); | |
961 | ||
962 | if (sg_count == 1) { | |
963 | desc->ptr[4].ptr = cpu_to_be32(sg_dma_address(areq->src)); | |
964 | } else { | |
fe5720e2 KP |
965 | sg_link_tbl_len = cryptlen; |
966 | ||
967 | if ((edesc->desc.hdr & DESC_HDR_MODE1_MDEU_CICV) && | |
968 | (edesc->desc.hdr & DESC_HDR_MODE0_ENCRYPT) == 0) { | |
969 | sg_link_tbl_len = cryptlen + authsize; | |
970 | } | |
971 | sg_count = sg_to_link_tbl(areq->src, sg_count, sg_link_tbl_len, | |
70bcaca7 LN |
972 | &edesc->link_tbl[0]); |
973 | if (sg_count > 1) { | |
974 | desc->ptr[4].j_extent |= DESC_PTR_LNKTBL_JUMP; | |
975 | desc->ptr[4].ptr = cpu_to_be32(edesc->dma_link_tbl); | |
976 | dma_sync_single_for_device(ctx->dev, edesc->dma_link_tbl, | |
977 | edesc->dma_len, DMA_BIDIRECTIONAL); | |
978 | } else { | |
979 | /* Only one segment now, so no link tbl needed */ | |
980 | desc->ptr[4].ptr = cpu_to_be32(sg_dma_address(areq->src)); | |
981 | } | |
9c4a7965 KP |
982 | } |
983 | ||
984 | /* cipher out */ | |
985 | desc->ptr[5].len = cpu_to_be16(cryptlen); | |
986 | desc->ptr[5].j_extent = authsize; | |
987 | ||
988 | if (areq->src != areq->dst) { | |
989 | sg_count = dma_map_sg(dev, areq->dst, edesc->dst_nents ? : 1, | |
990 | DMA_FROM_DEVICE); | |
991 | } | |
992 | ||
993 | if (sg_count == 1) { | |
994 | desc->ptr[5].ptr = cpu_to_be32(sg_dma_address(areq->dst)); | |
995 | } else { | |
996 | struct talitos_ptr *link_tbl_ptr = | |
f3c85bc1 | 997 | &edesc->link_tbl[edesc->src_nents + 1]; |
9c4a7965 KP |
998 | |
999 | desc->ptr[5].ptr = cpu_to_be32((struct talitos_ptr *) | |
1000 | edesc->dma_link_tbl + | |
f3c85bc1 | 1001 | edesc->src_nents + 1); |
fe5720e2 KP |
1002 | sg_count = sg_to_link_tbl(areq->dst, sg_count, cryptlen, |
1003 | link_tbl_ptr); | |
1004 | ||
f3c85bc1 | 1005 | /* Add an entry to the link table for ICV data */ |
9c4a7965 | 1006 | link_tbl_ptr += sg_count - 1; |
9c4a7965 | 1007 | link_tbl_ptr->j_extent = 0; |
f3c85bc1 | 1008 | sg_count++; |
9c4a7965 KP |
1009 | link_tbl_ptr++; |
1010 | link_tbl_ptr->j_extent = DESC_PTR_LNKTBL_RETURN; | |
1011 | link_tbl_ptr->len = cpu_to_be16(authsize); | |
1012 | ||
1013 | /* icv data follows link tables */ | |
1014 | link_tbl_ptr->ptr = cpu_to_be32((struct talitos_ptr *) | |
1015 | edesc->dma_link_tbl + | |
1016 | edesc->src_nents + | |
f3c85bc1 | 1017 | edesc->dst_nents + 2); |
9c4a7965 KP |
1018 | |
1019 | desc->ptr[5].j_extent |= DESC_PTR_LNKTBL_JUMP; | |
1020 | dma_sync_single_for_device(ctx->dev, edesc->dma_link_tbl, | |
1021 | edesc->dma_len, DMA_BIDIRECTIONAL); | |
1022 | } | |
1023 | ||
1024 | /* iv out */ | |
1025 | map_single_talitos_ptr(dev, &desc->ptr[6], ivsize, ctx->iv, 0, | |
1026 | DMA_FROM_DEVICE); | |
1027 | ||
fa86a267 KP |
1028 | ret = talitos_submit(dev, desc, callback, areq); |
1029 | if (ret != -EINPROGRESS) { | |
1030 | ipsec_esp_unmap(dev, edesc, areq); | |
1031 | kfree(edesc); | |
1032 | } | |
1033 | return ret; | |
9c4a7965 KP |
1034 | } |
1035 | ||
1036 | ||
1037 | /* | |
1038 | * derive number of elements in scatterlist | |
1039 | */ | |
1040 | static int sg_count(struct scatterlist *sg_list, int nbytes) | |
1041 | { | |
1042 | struct scatterlist *sg = sg_list; | |
1043 | int sg_nents = 0; | |
1044 | ||
1045 | while (nbytes) { | |
1046 | sg_nents++; | |
1047 | nbytes -= sg->length; | |
1048 | sg = sg_next(sg); | |
1049 | } | |
1050 | ||
1051 | return sg_nents; | |
1052 | } | |
1053 | ||
1054 | /* | |
1055 | * allocate and map the ipsec_esp extended descriptor | |
1056 | */ | |
1057 | static struct ipsec_esp_edesc *ipsec_esp_edesc_alloc(struct aead_request *areq, | |
1058 | int icv_stashing) | |
1059 | { | |
1060 | struct crypto_aead *authenc = crypto_aead_reqtfm(areq); | |
1061 | struct talitos_ctx *ctx = crypto_aead_ctx(authenc); | |
1062 | struct ipsec_esp_edesc *edesc; | |
1063 | int src_nents, dst_nents, alloc_len, dma_len; | |
586725f8 KP |
1064 | gfp_t flags = areq->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL : |
1065 | GFP_ATOMIC; | |
9c4a7965 KP |
1066 | |
1067 | if (areq->cryptlen + ctx->authsize > TALITOS_MAX_DATA_LEN) { | |
1068 | dev_err(ctx->dev, "cryptlen exceeds h/w max limit\n"); | |
1069 | return ERR_PTR(-EINVAL); | |
1070 | } | |
1071 | ||
1072 | src_nents = sg_count(areq->src, areq->cryptlen + ctx->authsize); | |
1073 | src_nents = (src_nents == 1) ? 0 : src_nents; | |
1074 | ||
1075 | if (areq->dst == areq->src) { | |
1076 | dst_nents = src_nents; | |
1077 | } else { | |
1078 | dst_nents = sg_count(areq->dst, areq->cryptlen + ctx->authsize); | |
695ad589 | 1079 | dst_nents = (dst_nents == 1) ? 0 : dst_nents; |
9c4a7965 KP |
1080 | } |
1081 | ||
1082 | /* | |
1083 | * allocate space for base edesc plus the link tables, | |
f3c85bc1 | 1084 | * allowing for two separate entries for ICV and generated ICV (+ 2), |
9c4a7965 KP |
1085 | * and the ICV data itself |
1086 | */ | |
1087 | alloc_len = sizeof(struct ipsec_esp_edesc); | |
1088 | if (src_nents || dst_nents) { | |
f3c85bc1 | 1089 | dma_len = (src_nents + dst_nents + 2) * |
9c4a7965 KP |
1090 | sizeof(struct talitos_ptr) + ctx->authsize; |
1091 | alloc_len += dma_len; | |
1092 | } else { | |
1093 | dma_len = 0; | |
1094 | alloc_len += icv_stashing ? ctx->authsize : 0; | |
1095 | } | |
1096 | ||
586725f8 | 1097 | edesc = kmalloc(alloc_len, GFP_DMA | flags); |
9c4a7965 KP |
1098 | if (!edesc) { |
1099 | dev_err(ctx->dev, "could not allocate edescriptor\n"); | |
1100 | return ERR_PTR(-ENOMEM); | |
1101 | } | |
1102 | ||
1103 | edesc->src_nents = src_nents; | |
1104 | edesc->dst_nents = dst_nents; | |
1105 | edesc->dma_len = dma_len; | |
1106 | edesc->dma_link_tbl = dma_map_single(ctx->dev, &edesc->link_tbl[0], | |
1107 | edesc->dma_len, DMA_BIDIRECTIONAL); | |
1108 | ||
1109 | return edesc; | |
1110 | } | |
1111 | ||
70bcaca7 | 1112 | static int aead_authenc_encrypt(struct aead_request *req) |
9c4a7965 KP |
1113 | { |
1114 | struct crypto_aead *authenc = crypto_aead_reqtfm(req); | |
1115 | struct talitos_ctx *ctx = crypto_aead_ctx(authenc); | |
1116 | struct ipsec_esp_edesc *edesc; | |
1117 | ||
1118 | /* allocate extended descriptor */ | |
1119 | edesc = ipsec_esp_edesc_alloc(req, 0); | |
1120 | if (IS_ERR(edesc)) | |
1121 | return PTR_ERR(edesc); | |
1122 | ||
1123 | /* set encrypt */ | |
70bcaca7 | 1124 | edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT; |
9c4a7965 KP |
1125 | |
1126 | return ipsec_esp(edesc, req, NULL, 0, ipsec_esp_encrypt_done); | |
1127 | } | |
1128 | ||
fe5720e2 KP |
1129 | |
1130 | ||
70bcaca7 | 1131 | static int aead_authenc_decrypt(struct aead_request *req) |
9c4a7965 KP |
1132 | { |
1133 | struct crypto_aead *authenc = crypto_aead_reqtfm(req); | |
1134 | struct talitos_ctx *ctx = crypto_aead_ctx(authenc); | |
1135 | unsigned int authsize = ctx->authsize; | |
fe5720e2 | 1136 | struct talitos_private *priv = dev_get_drvdata(ctx->dev); |
9c4a7965 KP |
1137 | struct ipsec_esp_edesc *edesc; |
1138 | struct scatterlist *sg; | |
1139 | void *icvdata; | |
1140 | ||
1141 | req->cryptlen -= authsize; | |
1142 | ||
1143 | /* allocate extended descriptor */ | |
1144 | edesc = ipsec_esp_edesc_alloc(req, 1); | |
1145 | if (IS_ERR(edesc)) | |
1146 | return PTR_ERR(edesc); | |
1147 | ||
fe5720e2 KP |
1148 | if ((priv->features & TALITOS_FTR_HW_AUTH_CHECK) && |
1149 | (((!edesc->src_nents && !edesc->dst_nents) || | |
1150 | priv->features & TALITOS_FTR_SRC_LINK_TBL_LEN_INCLUDES_EXTENT))) { | |
9c4a7965 | 1151 | |
fe5720e2 KP |
1152 | /* decrypt and check the ICV */ |
1153 | edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_DIR_INBOUND | | |
1154 | DESC_HDR_MODE1_MDEU_CICV; | |
9c4a7965 | 1155 | |
fe5720e2 KP |
1156 | /* reset integrity check result bits */ |
1157 | edesc->desc.hdr_lo = 0; | |
9c4a7965 | 1158 | |
fe5720e2 | 1159 | return ipsec_esp(edesc, req, NULL, 0, ipsec_esp_decrypt_hwauth_done); |
9c4a7965 | 1160 | |
fe5720e2 KP |
1161 | } else { |
1162 | ||
1163 | /* Have to check the ICV with software */ | |
1164 | ||
1165 | edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_DIR_INBOUND; | |
1166 | ||
1167 | /* stash incoming ICV for later cmp with ICV generated by the h/w */ | |
1168 | if (edesc->dma_len) | |
1169 | icvdata = &edesc->link_tbl[edesc->src_nents + | |
1170 | edesc->dst_nents + 2]; | |
1171 | else | |
1172 | icvdata = &edesc->link_tbl[0]; | |
1173 | ||
1174 | sg = sg_last(req->src, edesc->src_nents ? : 1); | |
1175 | ||
1176 | memcpy(icvdata, (char *)sg_virt(sg) + sg->length - ctx->authsize, | |
1177 | ctx->authsize); | |
1178 | ||
1179 | return ipsec_esp(edesc, req, NULL, 0, ipsec_esp_decrypt_swauth_done); | |
1180 | } | |
9c4a7965 KP |
1181 | } |
1182 | ||
70bcaca7 | 1183 | static int aead_authenc_givencrypt( |
9c4a7965 KP |
1184 | struct aead_givcrypt_request *req) |
1185 | { | |
1186 | struct aead_request *areq = &req->areq; | |
1187 | struct crypto_aead *authenc = crypto_aead_reqtfm(areq); | |
1188 | struct talitos_ctx *ctx = crypto_aead_ctx(authenc); | |
1189 | struct ipsec_esp_edesc *edesc; | |
1190 | ||
1191 | /* allocate extended descriptor */ | |
1192 | edesc = ipsec_esp_edesc_alloc(areq, 0); | |
1193 | if (IS_ERR(edesc)) | |
1194 | return PTR_ERR(edesc); | |
1195 | ||
1196 | /* set encrypt */ | |
70bcaca7 | 1197 | edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT; |
9c4a7965 KP |
1198 | |
1199 | memcpy(req->giv, ctx->iv, crypto_aead_ivsize(authenc)); | |
ba95487d KP |
1200 | /* avoid consecutive packets going out with same IV */ |
1201 | *(__be64 *)req->giv ^= cpu_to_be64(req->seq); | |
9c4a7965 KP |
1202 | |
1203 | return ipsec_esp(edesc, areq, req->giv, req->seq, | |
1204 | ipsec_esp_encrypt_done); | |
1205 | } | |
1206 | ||
1207 | struct talitos_alg_template { | |
1208 | char name[CRYPTO_MAX_ALG_NAME]; | |
1209 | char driver_name[CRYPTO_MAX_ALG_NAME]; | |
1210 | unsigned int blocksize; | |
1211 | struct aead_alg aead; | |
1212 | struct device *dev; | |
1213 | __be32 desc_hdr_template; | |
1214 | }; | |
1215 | ||
1216 | static struct talitos_alg_template driver_algs[] = { | |
1217 | /* single-pass ipsec_esp descriptor */ | |
1218 | { | |
1219 | .name = "authenc(hmac(sha1),cbc(aes))", | |
ebbcf336 | 1220 | .driver_name = "authenc-hmac-sha1-cbc-aes-talitos", |
3952f17e | 1221 | .blocksize = AES_BLOCK_SIZE, |
9c4a7965 | 1222 | .aead = { |
70bcaca7 LN |
1223 | .setkey = aead_authenc_setkey, |
1224 | .setauthsize = aead_authenc_setauthsize, | |
1225 | .encrypt = aead_authenc_encrypt, | |
1226 | .decrypt = aead_authenc_decrypt, | |
1227 | .givencrypt = aead_authenc_givencrypt, | |
9c4a7965 | 1228 | .geniv = "<built-in>", |
3952f17e LN |
1229 | .ivsize = AES_BLOCK_SIZE, |
1230 | .maxauthsize = SHA1_DIGEST_SIZE, | |
9c4a7965 KP |
1231 | }, |
1232 | .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP | | |
1233 | DESC_HDR_SEL0_AESU | | |
1234 | DESC_HDR_MODE0_AESU_CBC | | |
1235 | DESC_HDR_SEL1_MDEUA | | |
1236 | DESC_HDR_MODE1_MDEU_INIT | | |
1237 | DESC_HDR_MODE1_MDEU_PAD | | |
1238 | DESC_HDR_MODE1_MDEU_SHA1_HMAC, | |
70bcaca7 LN |
1239 | }, |
1240 | { | |
1241 | .name = "authenc(hmac(sha1),cbc(des3_ede))", | |
ebbcf336 | 1242 | .driver_name = "authenc-hmac-sha1-cbc-3des-talitos", |
3952f17e | 1243 | .blocksize = DES3_EDE_BLOCK_SIZE, |
70bcaca7 LN |
1244 | .aead = { |
1245 | .setkey = aead_authenc_setkey, | |
1246 | .setauthsize = aead_authenc_setauthsize, | |
1247 | .encrypt = aead_authenc_encrypt, | |
1248 | .decrypt = aead_authenc_decrypt, | |
1249 | .givencrypt = aead_authenc_givencrypt, | |
1250 | .geniv = "<built-in>", | |
3952f17e LN |
1251 | .ivsize = DES3_EDE_BLOCK_SIZE, |
1252 | .maxauthsize = SHA1_DIGEST_SIZE, | |
70bcaca7 LN |
1253 | }, |
1254 | .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP | | |
1255 | DESC_HDR_SEL0_DEU | | |
1256 | DESC_HDR_MODE0_DEU_CBC | | |
1257 | DESC_HDR_MODE0_DEU_3DES | | |
1258 | DESC_HDR_SEL1_MDEUA | | |
1259 | DESC_HDR_MODE1_MDEU_INIT | | |
1260 | DESC_HDR_MODE1_MDEU_PAD | | |
1261 | DESC_HDR_MODE1_MDEU_SHA1_HMAC, | |
3952f17e LN |
1262 | }, |
1263 | { | |
1264 | .name = "authenc(hmac(sha256),cbc(aes))", | |
1265 | .driver_name = "authenc-hmac-sha256-cbc-aes-talitos", | |
1266 | .blocksize = AES_BLOCK_SIZE, | |
1267 | .aead = { | |
1268 | .setkey = aead_authenc_setkey, | |
1269 | .setauthsize = aead_authenc_setauthsize, | |
1270 | .encrypt = aead_authenc_encrypt, | |
1271 | .decrypt = aead_authenc_decrypt, | |
1272 | .givencrypt = aead_authenc_givencrypt, | |
1273 | .geniv = "<built-in>", | |
1274 | .ivsize = AES_BLOCK_SIZE, | |
1275 | .maxauthsize = SHA256_DIGEST_SIZE, | |
1276 | }, | |
1277 | .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP | | |
1278 | DESC_HDR_SEL0_AESU | | |
1279 | DESC_HDR_MODE0_AESU_CBC | | |
1280 | DESC_HDR_SEL1_MDEUA | | |
1281 | DESC_HDR_MODE1_MDEU_INIT | | |
1282 | DESC_HDR_MODE1_MDEU_PAD | | |
1283 | DESC_HDR_MODE1_MDEU_SHA256_HMAC, | |
1284 | }, | |
1285 | { | |
1286 | .name = "authenc(hmac(sha256),cbc(des3_ede))", | |
1287 | .driver_name = "authenc-hmac-sha256-cbc-3des-talitos", | |
1288 | .blocksize = DES3_EDE_BLOCK_SIZE, | |
1289 | .aead = { | |
1290 | .setkey = aead_authenc_setkey, | |
1291 | .setauthsize = aead_authenc_setauthsize, | |
1292 | .encrypt = aead_authenc_encrypt, | |
1293 | .decrypt = aead_authenc_decrypt, | |
1294 | .givencrypt = aead_authenc_givencrypt, | |
1295 | .geniv = "<built-in>", | |
1296 | .ivsize = DES3_EDE_BLOCK_SIZE, | |
1297 | .maxauthsize = SHA256_DIGEST_SIZE, | |
1298 | }, | |
1299 | .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP | | |
1300 | DESC_HDR_SEL0_DEU | | |
1301 | DESC_HDR_MODE0_DEU_CBC | | |
1302 | DESC_HDR_MODE0_DEU_3DES | | |
1303 | DESC_HDR_SEL1_MDEUA | | |
1304 | DESC_HDR_MODE1_MDEU_INIT | | |
1305 | DESC_HDR_MODE1_MDEU_PAD | | |
1306 | DESC_HDR_MODE1_MDEU_SHA256_HMAC, | |
1307 | }, | |
1308 | { | |
1309 | .name = "authenc(hmac(md5),cbc(aes))", | |
1310 | .driver_name = "authenc-hmac-md5-cbc-aes-talitos", | |
1311 | .blocksize = AES_BLOCK_SIZE, | |
1312 | .aead = { | |
1313 | .setkey = aead_authenc_setkey, | |
1314 | .setauthsize = aead_authenc_setauthsize, | |
1315 | .encrypt = aead_authenc_encrypt, | |
1316 | .decrypt = aead_authenc_decrypt, | |
1317 | .givencrypt = aead_authenc_givencrypt, | |
1318 | .geniv = "<built-in>", | |
1319 | .ivsize = AES_BLOCK_SIZE, | |
1320 | .maxauthsize = MD5_DIGEST_SIZE, | |
1321 | }, | |
1322 | .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP | | |
1323 | DESC_HDR_SEL0_AESU | | |
1324 | DESC_HDR_MODE0_AESU_CBC | | |
1325 | DESC_HDR_SEL1_MDEUA | | |
1326 | DESC_HDR_MODE1_MDEU_INIT | | |
1327 | DESC_HDR_MODE1_MDEU_PAD | | |
1328 | DESC_HDR_MODE1_MDEU_MD5_HMAC, | |
1329 | }, | |
1330 | { | |
1331 | .name = "authenc(hmac(md5),cbc(des3_ede))", | |
1332 | .driver_name = "authenc-hmac-md5-cbc-3des-talitos", | |
1333 | .blocksize = DES3_EDE_BLOCK_SIZE, | |
1334 | .aead = { | |
1335 | .setkey = aead_authenc_setkey, | |
1336 | .setauthsize = aead_authenc_setauthsize, | |
1337 | .encrypt = aead_authenc_encrypt, | |
1338 | .decrypt = aead_authenc_decrypt, | |
1339 | .givencrypt = aead_authenc_givencrypt, | |
1340 | .geniv = "<built-in>", | |
1341 | .ivsize = DES3_EDE_BLOCK_SIZE, | |
1342 | .maxauthsize = MD5_DIGEST_SIZE, | |
1343 | }, | |
1344 | .desc_hdr_template = DESC_HDR_TYPE_IPSEC_ESP | | |
1345 | DESC_HDR_SEL0_DEU | | |
1346 | DESC_HDR_MODE0_DEU_CBC | | |
1347 | DESC_HDR_MODE0_DEU_3DES | | |
1348 | DESC_HDR_SEL1_MDEUA | | |
1349 | DESC_HDR_MODE1_MDEU_INIT | | |
1350 | DESC_HDR_MODE1_MDEU_PAD | | |
1351 | DESC_HDR_MODE1_MDEU_MD5_HMAC, | |
9c4a7965 KP |
1352 | } |
1353 | }; | |
1354 | ||
1355 | struct talitos_crypto_alg { | |
1356 | struct list_head entry; | |
1357 | struct device *dev; | |
1358 | __be32 desc_hdr_template; | |
1359 | struct crypto_alg crypto_alg; | |
1360 | }; | |
1361 | ||
1362 | static int talitos_cra_init(struct crypto_tfm *tfm) | |
1363 | { | |
1364 | struct crypto_alg *alg = tfm->__crt_alg; | |
1365 | struct talitos_crypto_alg *talitos_alg = | |
1366 | container_of(alg, struct talitos_crypto_alg, crypto_alg); | |
1367 | struct talitos_ctx *ctx = crypto_tfm_ctx(tfm); | |
1368 | ||
1369 | /* update context with ptr to dev */ | |
1370 | ctx->dev = talitos_alg->dev; | |
1371 | /* copy descriptor header template value */ | |
1372 | ctx->desc_hdr_template = talitos_alg->desc_hdr_template; | |
1373 | ||
1374 | /* random first IV */ | |
70bcaca7 | 1375 | get_random_bytes(ctx->iv, TALITOS_MAX_IV_LENGTH); |
9c4a7965 KP |
1376 | |
1377 | return 0; | |
1378 | } | |
1379 | ||
1380 | /* | |
1381 | * given the alg's descriptor header template, determine whether descriptor | |
1382 | * type and primary/secondary execution units required match the hw | |
1383 | * capabilities description provided in the device tree node. | |
1384 | */ | |
1385 | static int hw_supports(struct device *dev, __be32 desc_hdr_template) | |
1386 | { | |
1387 | struct talitos_private *priv = dev_get_drvdata(dev); | |
1388 | int ret; | |
1389 | ||
1390 | ret = (1 << DESC_TYPE(desc_hdr_template) & priv->desc_types) && | |
1391 | (1 << PRIMARY_EU(desc_hdr_template) & priv->exec_units); | |
1392 | ||
1393 | if (SECONDARY_EU(desc_hdr_template)) | |
1394 | ret = ret && (1 << SECONDARY_EU(desc_hdr_template) | |
1395 | & priv->exec_units); | |
1396 | ||
1397 | return ret; | |
1398 | } | |
1399 | ||
596f1034 | 1400 | static int talitos_remove(struct of_device *ofdev) |
9c4a7965 KP |
1401 | { |
1402 | struct device *dev = &ofdev->dev; | |
1403 | struct talitos_private *priv = dev_get_drvdata(dev); | |
1404 | struct talitos_crypto_alg *t_alg, *n; | |
1405 | int i; | |
1406 | ||
1407 | list_for_each_entry_safe(t_alg, n, &priv->alg_list, entry) { | |
1408 | crypto_unregister_alg(&t_alg->crypto_alg); | |
1409 | list_del(&t_alg->entry); | |
1410 | kfree(t_alg); | |
1411 | } | |
1412 | ||
1413 | if (hw_supports(dev, DESC_HDR_SEL0_RNG)) | |
1414 | talitos_unregister_rng(dev); | |
1415 | ||
ec6644d6 | 1416 | kfree(priv->submit_count); |
9c4a7965 KP |
1417 | kfree(priv->tail); |
1418 | kfree(priv->head); | |
1419 | ||
1420 | if (priv->fifo) | |
1421 | for (i = 0; i < priv->num_channels; i++) | |
1422 | kfree(priv->fifo[i]); | |
1423 | ||
1424 | kfree(priv->fifo); | |
1425 | kfree(priv->head_lock); | |
1426 | kfree(priv->tail_lock); | |
1427 | ||
1428 | if (priv->irq != NO_IRQ) { | |
1429 | free_irq(priv->irq, dev); | |
1430 | irq_dispose_mapping(priv->irq); | |
1431 | } | |
1432 | ||
1433 | tasklet_kill(&priv->done_task); | |
9c4a7965 KP |
1434 | |
1435 | iounmap(priv->reg); | |
1436 | ||
1437 | dev_set_drvdata(dev, NULL); | |
1438 | ||
1439 | kfree(priv); | |
1440 | ||
1441 | return 0; | |
1442 | } | |
1443 | ||
1444 | static struct talitos_crypto_alg *talitos_alg_alloc(struct device *dev, | |
1445 | struct talitos_alg_template | |
1446 | *template) | |
1447 | { | |
1448 | struct talitos_crypto_alg *t_alg; | |
1449 | struct crypto_alg *alg; | |
1450 | ||
1451 | t_alg = kzalloc(sizeof(struct talitos_crypto_alg), GFP_KERNEL); | |
1452 | if (!t_alg) | |
1453 | return ERR_PTR(-ENOMEM); | |
1454 | ||
1455 | alg = &t_alg->crypto_alg; | |
1456 | ||
1457 | snprintf(alg->cra_name, CRYPTO_MAX_ALG_NAME, "%s", template->name); | |
1458 | snprintf(alg->cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s", | |
1459 | template->driver_name); | |
1460 | alg->cra_module = THIS_MODULE; | |
1461 | alg->cra_init = talitos_cra_init; | |
1462 | alg->cra_priority = TALITOS_CRA_PRIORITY; | |
1463 | alg->cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC; | |
1464 | alg->cra_blocksize = template->blocksize; | |
1465 | alg->cra_alignmask = 0; | |
1466 | alg->cra_type = &crypto_aead_type; | |
1467 | alg->cra_ctxsize = sizeof(struct talitos_ctx); | |
1468 | alg->cra_u.aead = template->aead; | |
1469 | ||
1470 | t_alg->desc_hdr_template = template->desc_hdr_template; | |
1471 | t_alg->dev = dev; | |
1472 | ||
1473 | return t_alg; | |
1474 | } | |
1475 | ||
1476 | static int talitos_probe(struct of_device *ofdev, | |
1477 | const struct of_device_id *match) | |
1478 | { | |
1479 | struct device *dev = &ofdev->dev; | |
1480 | struct device_node *np = ofdev->node; | |
1481 | struct talitos_private *priv; | |
1482 | const unsigned int *prop; | |
1483 | int i, err; | |
1484 | ||
1485 | priv = kzalloc(sizeof(struct talitos_private), GFP_KERNEL); | |
1486 | if (!priv) | |
1487 | return -ENOMEM; | |
1488 | ||
1489 | dev_set_drvdata(dev, priv); | |
1490 | ||
1491 | priv->ofdev = ofdev; | |
1492 | ||
1493 | tasklet_init(&priv->done_task, talitos_done, (unsigned long)dev); | |
9c4a7965 | 1494 | |
fe5720e2 KP |
1495 | INIT_LIST_HEAD(&priv->alg_list); |
1496 | ||
9c4a7965 KP |
1497 | priv->irq = irq_of_parse_and_map(np, 0); |
1498 | ||
1499 | if (priv->irq == NO_IRQ) { | |
1500 | dev_err(dev, "failed to map irq\n"); | |
1501 | err = -EINVAL; | |
1502 | goto err_out; | |
1503 | } | |
1504 | ||
1505 | /* get the irq line */ | |
1506 | err = request_irq(priv->irq, talitos_interrupt, 0, | |
1507 | dev_driver_string(dev), dev); | |
1508 | if (err) { | |
1509 | dev_err(dev, "failed to request irq %d\n", priv->irq); | |
1510 | irq_dispose_mapping(priv->irq); | |
1511 | priv->irq = NO_IRQ; | |
1512 | goto err_out; | |
1513 | } | |
1514 | ||
1515 | priv->reg = of_iomap(np, 0); | |
1516 | if (!priv->reg) { | |
1517 | dev_err(dev, "failed to of_iomap\n"); | |
1518 | err = -ENOMEM; | |
1519 | goto err_out; | |
1520 | } | |
1521 | ||
1522 | /* get SEC version capabilities from device tree */ | |
1523 | prop = of_get_property(np, "fsl,num-channels", NULL); | |
1524 | if (prop) | |
1525 | priv->num_channels = *prop; | |
1526 | ||
1527 | prop = of_get_property(np, "fsl,channel-fifo-len", NULL); | |
1528 | if (prop) | |
1529 | priv->chfifo_len = *prop; | |
1530 | ||
1531 | prop = of_get_property(np, "fsl,exec-units-mask", NULL); | |
1532 | if (prop) | |
1533 | priv->exec_units = *prop; | |
1534 | ||
1535 | prop = of_get_property(np, "fsl,descriptor-types-mask", NULL); | |
1536 | if (prop) | |
1537 | priv->desc_types = *prop; | |
1538 | ||
1539 | if (!is_power_of_2(priv->num_channels) || !priv->chfifo_len || | |
1540 | !priv->exec_units || !priv->desc_types) { | |
1541 | dev_err(dev, "invalid property data in device tree node\n"); | |
1542 | err = -EINVAL; | |
1543 | goto err_out; | |
1544 | } | |
1545 | ||
f3c85bc1 LN |
1546 | if (of_device_is_compatible(np, "fsl,sec3.0")) |
1547 | priv->features |= TALITOS_FTR_SRC_LINK_TBL_LEN_INCLUDES_EXTENT; | |
1548 | ||
fe5720e2 KP |
1549 | if (of_device_is_compatible(np, "fsl,sec2.1")) |
1550 | priv->features |= TALITOS_FTR_HW_AUTH_CHECK; | |
1551 | ||
9c4a7965 KP |
1552 | priv->head_lock = kmalloc(sizeof(spinlock_t) * priv->num_channels, |
1553 | GFP_KERNEL); | |
1554 | priv->tail_lock = kmalloc(sizeof(spinlock_t) * priv->num_channels, | |
1555 | GFP_KERNEL); | |
1556 | if (!priv->head_lock || !priv->tail_lock) { | |
1557 | dev_err(dev, "failed to allocate fifo locks\n"); | |
1558 | err = -ENOMEM; | |
1559 | goto err_out; | |
1560 | } | |
1561 | ||
1562 | for (i = 0; i < priv->num_channels; i++) { | |
1563 | spin_lock_init(&priv->head_lock[i]); | |
1564 | spin_lock_init(&priv->tail_lock[i]); | |
1565 | } | |
1566 | ||
1567 | priv->fifo = kmalloc(sizeof(struct talitos_request *) * | |
1568 | priv->num_channels, GFP_KERNEL); | |
1569 | if (!priv->fifo) { | |
1570 | dev_err(dev, "failed to allocate request fifo\n"); | |
1571 | err = -ENOMEM; | |
1572 | goto err_out; | |
1573 | } | |
1574 | ||
1575 | priv->fifo_len = roundup_pow_of_two(priv->chfifo_len); | |
1576 | ||
1577 | for (i = 0; i < priv->num_channels; i++) { | |
1578 | priv->fifo[i] = kzalloc(sizeof(struct talitos_request) * | |
1579 | priv->fifo_len, GFP_KERNEL); | |
1580 | if (!priv->fifo[i]) { | |
1581 | dev_err(dev, "failed to allocate request fifo %d\n", i); | |
1582 | err = -ENOMEM; | |
1583 | goto err_out; | |
1584 | } | |
1585 | } | |
1586 | ||
586725f8 | 1587 | priv->submit_count = kmalloc(sizeof(atomic_t) * priv->num_channels, |
ec6644d6 KP |
1588 | GFP_KERNEL); |
1589 | if (!priv->submit_count) { | |
1590 | dev_err(dev, "failed to allocate fifo submit count space\n"); | |
1591 | err = -ENOMEM; | |
1592 | goto err_out; | |
1593 | } | |
1594 | for (i = 0; i < priv->num_channels; i++) | |
4b24ea97 | 1595 | atomic_set(&priv->submit_count[i], -(priv->chfifo_len - 1)); |
ec6644d6 | 1596 | |
9c4a7965 KP |
1597 | priv->head = kzalloc(sizeof(int) * priv->num_channels, GFP_KERNEL); |
1598 | priv->tail = kzalloc(sizeof(int) * priv->num_channels, GFP_KERNEL); | |
1599 | if (!priv->head || !priv->tail) { | |
1600 | dev_err(dev, "failed to allocate request index space\n"); | |
1601 | err = -ENOMEM; | |
1602 | goto err_out; | |
1603 | } | |
1604 | ||
1605 | /* reset and initialize the h/w */ | |
1606 | err = init_device(dev); | |
1607 | if (err) { | |
1608 | dev_err(dev, "failed to initialize device\n"); | |
1609 | goto err_out; | |
1610 | } | |
1611 | ||
1612 | /* register the RNG, if available */ | |
1613 | if (hw_supports(dev, DESC_HDR_SEL0_RNG)) { | |
1614 | err = talitos_register_rng(dev); | |
1615 | if (err) { | |
1616 | dev_err(dev, "failed to register hwrng: %d\n", err); | |
1617 | goto err_out; | |
1618 | } else | |
1619 | dev_info(dev, "hwrng\n"); | |
1620 | } | |
1621 | ||
1622 | /* register crypto algorithms the device supports */ | |
9c4a7965 KP |
1623 | for (i = 0; i < ARRAY_SIZE(driver_algs); i++) { |
1624 | if (hw_supports(dev, driver_algs[i].desc_hdr_template)) { | |
1625 | struct talitos_crypto_alg *t_alg; | |
1626 | ||
1627 | t_alg = talitos_alg_alloc(dev, &driver_algs[i]); | |
1628 | if (IS_ERR(t_alg)) { | |
1629 | err = PTR_ERR(t_alg); | |
1630 | goto err_out; | |
1631 | } | |
1632 | ||
1633 | err = crypto_register_alg(&t_alg->crypto_alg); | |
1634 | if (err) { | |
1635 | dev_err(dev, "%s alg registration failed\n", | |
1636 | t_alg->crypto_alg.cra_driver_name); | |
1637 | kfree(t_alg); | |
1638 | } else { | |
1639 | list_add_tail(&t_alg->entry, &priv->alg_list); | |
1640 | dev_info(dev, "%s\n", | |
1641 | t_alg->crypto_alg.cra_driver_name); | |
1642 | } | |
1643 | } | |
1644 | } | |
1645 | ||
1646 | return 0; | |
1647 | ||
1648 | err_out: | |
1649 | talitos_remove(ofdev); | |
9c4a7965 KP |
1650 | |
1651 | return err; | |
1652 | } | |
1653 | ||
1654 | static struct of_device_id talitos_match[] = { | |
1655 | { | |
1656 | .compatible = "fsl,sec2.0", | |
1657 | }, | |
1658 | {}, | |
1659 | }; | |
1660 | MODULE_DEVICE_TABLE(of, talitos_match); | |
1661 | ||
1662 | static struct of_platform_driver talitos_driver = { | |
1663 | .name = "talitos", | |
1664 | .match_table = talitos_match, | |
1665 | .probe = talitos_probe, | |
596f1034 | 1666 | .remove = talitos_remove, |
9c4a7965 KP |
1667 | }; |
1668 | ||
1669 | static int __init talitos_init(void) | |
1670 | { | |
1671 | return of_register_platform_driver(&talitos_driver); | |
1672 | } | |
1673 | module_init(talitos_init); | |
1674 | ||
1675 | static void __exit talitos_exit(void) | |
1676 | { | |
1677 | of_unregister_platform_driver(&talitos_driver); | |
1678 | } | |
1679 | module_exit(talitos_exit); | |
1680 | ||
1681 | MODULE_LICENSE("GPL"); | |
1682 | MODULE_AUTHOR("Kim Phillips <kim.phillips@freescale.com>"); | |
1683 | MODULE_DESCRIPTION("Freescale integrated security engine (SEC) driver"); |