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Merge branch 'misc.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
[mirror_ubuntu-bionic-kernel.git] / drivers / crypto / amcc / crypto4xx_core.c
1 /**
2 * AMCC SoC PPC4xx Crypto Driver
3 *
4 * Copyright (c) 2008 Applied Micro Circuits Corporation.
5 * All rights reserved. James Hsiao <jhsiao@amcc.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * This file implements AMCC crypto offload Linux device driver for use with
18 * Linux CryptoAPI.
19 */
20
21 #include <linux/kernel.h>
22 #include <linux/interrupt.h>
23 #include <linux/spinlock_types.h>
24 #include <linux/random.h>
25 #include <linux/scatterlist.h>
26 #include <linux/crypto.h>
27 #include <linux/dma-mapping.h>
28 #include <linux/platform_device.h>
29 #include <linux/init.h>
30 #include <linux/module.h>
31 #include <linux/of_address.h>
32 #include <linux/of_irq.h>
33 #include <linux/of_platform.h>
34 #include <linux/slab.h>
35 #include <asm/dcr.h>
36 #include <asm/dcr-regs.h>
37 #include <asm/cacheflush.h>
38 #include <crypto/aes.h>
39 #include <crypto/sha.h>
40 #include "crypto4xx_reg_def.h"
41 #include "crypto4xx_core.h"
42 #include "crypto4xx_sa.h"
43 #include "crypto4xx_trng.h"
44
45 #define PPC4XX_SEC_VERSION_STR "0.5"
46
47 /**
48 * PPC4xx Crypto Engine Initialization Routine
49 */
50 static void crypto4xx_hw_init(struct crypto4xx_device *dev)
51 {
52 union ce_ring_size ring_size;
53 union ce_ring_control ring_ctrl;
54 union ce_part_ring_size part_ring_size;
55 union ce_io_threshold io_threshold;
56 u32 rand_num;
57 union ce_pe_dma_cfg pe_dma_cfg;
58 u32 device_ctrl;
59
60 writel(PPC4XX_BYTE_ORDER, dev->ce_base + CRYPTO4XX_BYTE_ORDER_CFG);
61 /* setup pe dma, include reset sg, pdr and pe, then release reset */
62 pe_dma_cfg.w = 0;
63 pe_dma_cfg.bf.bo_sgpd_en = 1;
64 pe_dma_cfg.bf.bo_data_en = 0;
65 pe_dma_cfg.bf.bo_sa_en = 1;
66 pe_dma_cfg.bf.bo_pd_en = 1;
67 pe_dma_cfg.bf.dynamic_sa_en = 1;
68 pe_dma_cfg.bf.reset_sg = 1;
69 pe_dma_cfg.bf.reset_pdr = 1;
70 pe_dma_cfg.bf.reset_pe = 1;
71 writel(pe_dma_cfg.w, dev->ce_base + CRYPTO4XX_PE_DMA_CFG);
72 /* un reset pe,sg and pdr */
73 pe_dma_cfg.bf.pe_mode = 0;
74 pe_dma_cfg.bf.reset_sg = 0;
75 pe_dma_cfg.bf.reset_pdr = 0;
76 pe_dma_cfg.bf.reset_pe = 0;
77 pe_dma_cfg.bf.bo_td_en = 0;
78 writel(pe_dma_cfg.w, dev->ce_base + CRYPTO4XX_PE_DMA_CFG);
79 writel(dev->pdr_pa, dev->ce_base + CRYPTO4XX_PDR_BASE);
80 writel(dev->pdr_pa, dev->ce_base + CRYPTO4XX_RDR_BASE);
81 writel(PPC4XX_PRNG_CTRL_AUTO_EN, dev->ce_base + CRYPTO4XX_PRNG_CTRL);
82 get_random_bytes(&rand_num, sizeof(rand_num));
83 writel(rand_num, dev->ce_base + CRYPTO4XX_PRNG_SEED_L);
84 get_random_bytes(&rand_num, sizeof(rand_num));
85 writel(rand_num, dev->ce_base + CRYPTO4XX_PRNG_SEED_H);
86 ring_size.w = 0;
87 ring_size.bf.ring_offset = PPC4XX_PD_SIZE;
88 ring_size.bf.ring_size = PPC4XX_NUM_PD;
89 writel(ring_size.w, dev->ce_base + CRYPTO4XX_RING_SIZE);
90 ring_ctrl.w = 0;
91 writel(ring_ctrl.w, dev->ce_base + CRYPTO4XX_RING_CTRL);
92 device_ctrl = readl(dev->ce_base + CRYPTO4XX_DEVICE_CTRL);
93 device_ctrl |= PPC4XX_DC_3DES_EN;
94 writel(device_ctrl, dev->ce_base + CRYPTO4XX_DEVICE_CTRL);
95 writel(dev->gdr_pa, dev->ce_base + CRYPTO4XX_GATH_RING_BASE);
96 writel(dev->sdr_pa, dev->ce_base + CRYPTO4XX_SCAT_RING_BASE);
97 part_ring_size.w = 0;
98 part_ring_size.bf.sdr_size = PPC4XX_SDR_SIZE;
99 part_ring_size.bf.gdr_size = PPC4XX_GDR_SIZE;
100 writel(part_ring_size.w, dev->ce_base + CRYPTO4XX_PART_RING_SIZE);
101 writel(PPC4XX_SD_BUFFER_SIZE, dev->ce_base + CRYPTO4XX_PART_RING_CFG);
102 io_threshold.w = 0;
103 io_threshold.bf.output_threshold = PPC4XX_OUTPUT_THRESHOLD;
104 io_threshold.bf.input_threshold = PPC4XX_INPUT_THRESHOLD;
105 writel(io_threshold.w, dev->ce_base + CRYPTO4XX_IO_THRESHOLD);
106 writel(0, dev->ce_base + CRYPTO4XX_PDR_BASE_UADDR);
107 writel(0, dev->ce_base + CRYPTO4XX_RDR_BASE_UADDR);
108 writel(0, dev->ce_base + CRYPTO4XX_PKT_SRC_UADDR);
109 writel(0, dev->ce_base + CRYPTO4XX_PKT_DEST_UADDR);
110 writel(0, dev->ce_base + CRYPTO4XX_SA_UADDR);
111 writel(0, dev->ce_base + CRYPTO4XX_GATH_RING_BASE_UADDR);
112 writel(0, dev->ce_base + CRYPTO4XX_SCAT_RING_BASE_UADDR);
113 /* un reset pe,sg and pdr */
114 pe_dma_cfg.bf.pe_mode = 1;
115 pe_dma_cfg.bf.reset_sg = 0;
116 pe_dma_cfg.bf.reset_pdr = 0;
117 pe_dma_cfg.bf.reset_pe = 0;
118 pe_dma_cfg.bf.bo_td_en = 0;
119 writel(pe_dma_cfg.w, dev->ce_base + CRYPTO4XX_PE_DMA_CFG);
120 /*clear all pending interrupt*/
121 writel(PPC4XX_INTERRUPT_CLR, dev->ce_base + CRYPTO4XX_INT_CLR);
122 writel(PPC4XX_INT_DESCR_CNT, dev->ce_base + CRYPTO4XX_INT_DESCR_CNT);
123 writel(PPC4XX_INT_DESCR_CNT, dev->ce_base + CRYPTO4XX_INT_DESCR_CNT);
124 writel(PPC4XX_INT_CFG, dev->ce_base + CRYPTO4XX_INT_CFG);
125 writel(PPC4XX_PD_DONE_INT, dev->ce_base + CRYPTO4XX_INT_EN);
126 }
127
128 int crypto4xx_alloc_sa(struct crypto4xx_ctx *ctx, u32 size)
129 {
130 ctx->sa_in = dma_alloc_coherent(ctx->dev->core_dev->device, size * 4,
131 &ctx->sa_in_dma_addr, GFP_ATOMIC);
132 if (ctx->sa_in == NULL)
133 return -ENOMEM;
134
135 ctx->sa_out = dma_alloc_coherent(ctx->dev->core_dev->device, size * 4,
136 &ctx->sa_out_dma_addr, GFP_ATOMIC);
137 if (ctx->sa_out == NULL) {
138 dma_free_coherent(ctx->dev->core_dev->device, size * 4,
139 ctx->sa_in, ctx->sa_in_dma_addr);
140 return -ENOMEM;
141 }
142
143 memset(ctx->sa_in, 0, size * 4);
144 memset(ctx->sa_out, 0, size * 4);
145 ctx->sa_len = size;
146
147 return 0;
148 }
149
150 void crypto4xx_free_sa(struct crypto4xx_ctx *ctx)
151 {
152 if (ctx->sa_in != NULL)
153 dma_free_coherent(ctx->dev->core_dev->device, ctx->sa_len * 4,
154 ctx->sa_in, ctx->sa_in_dma_addr);
155 if (ctx->sa_out != NULL)
156 dma_free_coherent(ctx->dev->core_dev->device, ctx->sa_len * 4,
157 ctx->sa_out, ctx->sa_out_dma_addr);
158
159 ctx->sa_in_dma_addr = 0;
160 ctx->sa_out_dma_addr = 0;
161 ctx->sa_len = 0;
162 }
163
164 u32 crypto4xx_alloc_state_record(struct crypto4xx_ctx *ctx)
165 {
166 ctx->state_record = dma_alloc_coherent(ctx->dev->core_dev->device,
167 sizeof(struct sa_state_record),
168 &ctx->state_record_dma_addr, GFP_ATOMIC);
169 if (!ctx->state_record_dma_addr)
170 return -ENOMEM;
171 memset(ctx->state_record, 0, sizeof(struct sa_state_record));
172
173 return 0;
174 }
175
176 void crypto4xx_free_state_record(struct crypto4xx_ctx *ctx)
177 {
178 if (ctx->state_record != NULL)
179 dma_free_coherent(ctx->dev->core_dev->device,
180 sizeof(struct sa_state_record),
181 ctx->state_record,
182 ctx->state_record_dma_addr);
183 ctx->state_record_dma_addr = 0;
184 }
185
186 /**
187 * alloc memory for the gather ring
188 * no need to alloc buf for the ring
189 * gdr_tail, gdr_head and gdr_count are initialized by this function
190 */
191 static u32 crypto4xx_build_pdr(struct crypto4xx_device *dev)
192 {
193 int i;
194 struct pd_uinfo *pd_uinfo;
195 dev->pdr = dma_alloc_coherent(dev->core_dev->device,
196 sizeof(struct ce_pd) * PPC4XX_NUM_PD,
197 &dev->pdr_pa, GFP_ATOMIC);
198 if (!dev->pdr)
199 return -ENOMEM;
200
201 dev->pdr_uinfo = kzalloc(sizeof(struct pd_uinfo) * PPC4XX_NUM_PD,
202 GFP_KERNEL);
203 if (!dev->pdr_uinfo) {
204 dma_free_coherent(dev->core_dev->device,
205 sizeof(struct ce_pd) * PPC4XX_NUM_PD,
206 dev->pdr,
207 dev->pdr_pa);
208 return -ENOMEM;
209 }
210 memset(dev->pdr, 0, sizeof(struct ce_pd) * PPC4XX_NUM_PD);
211 dev->shadow_sa_pool = dma_alloc_coherent(dev->core_dev->device,
212 256 * PPC4XX_NUM_PD,
213 &dev->shadow_sa_pool_pa,
214 GFP_ATOMIC);
215 if (!dev->shadow_sa_pool)
216 return -ENOMEM;
217
218 dev->shadow_sr_pool = dma_alloc_coherent(dev->core_dev->device,
219 sizeof(struct sa_state_record) * PPC4XX_NUM_PD,
220 &dev->shadow_sr_pool_pa, GFP_ATOMIC);
221 if (!dev->shadow_sr_pool)
222 return -ENOMEM;
223 for (i = 0; i < PPC4XX_NUM_PD; i++) {
224 pd_uinfo = (struct pd_uinfo *) (dev->pdr_uinfo +
225 sizeof(struct pd_uinfo) * i);
226
227 /* alloc 256 bytes which is enough for any kind of dynamic sa */
228 pd_uinfo->sa_va = dev->shadow_sa_pool + 256 * i;
229 pd_uinfo->sa_pa = dev->shadow_sa_pool_pa + 256 * i;
230
231 /* alloc state record */
232 pd_uinfo->sr_va = dev->shadow_sr_pool +
233 sizeof(struct sa_state_record) * i;
234 pd_uinfo->sr_pa = dev->shadow_sr_pool_pa +
235 sizeof(struct sa_state_record) * i;
236 }
237
238 return 0;
239 }
240
241 static void crypto4xx_destroy_pdr(struct crypto4xx_device *dev)
242 {
243 if (dev->pdr != NULL)
244 dma_free_coherent(dev->core_dev->device,
245 sizeof(struct ce_pd) * PPC4XX_NUM_PD,
246 dev->pdr, dev->pdr_pa);
247 if (dev->shadow_sa_pool)
248 dma_free_coherent(dev->core_dev->device, 256 * PPC4XX_NUM_PD,
249 dev->shadow_sa_pool, dev->shadow_sa_pool_pa);
250 if (dev->shadow_sr_pool)
251 dma_free_coherent(dev->core_dev->device,
252 sizeof(struct sa_state_record) * PPC4XX_NUM_PD,
253 dev->shadow_sr_pool, dev->shadow_sr_pool_pa);
254
255 kfree(dev->pdr_uinfo);
256 }
257
258 static u32 crypto4xx_get_pd_from_pdr_nolock(struct crypto4xx_device *dev)
259 {
260 u32 retval;
261 u32 tmp;
262
263 retval = dev->pdr_head;
264 tmp = (dev->pdr_head + 1) % PPC4XX_NUM_PD;
265
266 if (tmp == dev->pdr_tail)
267 return ERING_WAS_FULL;
268
269 dev->pdr_head = tmp;
270
271 return retval;
272 }
273
274 static u32 crypto4xx_put_pd_to_pdr(struct crypto4xx_device *dev, u32 idx)
275 {
276 struct pd_uinfo *pd_uinfo;
277 unsigned long flags;
278
279 pd_uinfo = (struct pd_uinfo *)(dev->pdr_uinfo +
280 sizeof(struct pd_uinfo) * idx);
281 spin_lock_irqsave(&dev->core_dev->lock, flags);
282 if (dev->pdr_tail != PPC4XX_LAST_PD)
283 dev->pdr_tail++;
284 else
285 dev->pdr_tail = 0;
286 pd_uinfo->state = PD_ENTRY_FREE;
287 spin_unlock_irqrestore(&dev->core_dev->lock, flags);
288
289 return 0;
290 }
291
292 static struct ce_pd *crypto4xx_get_pdp(struct crypto4xx_device *dev,
293 dma_addr_t *pd_dma, u32 idx)
294 {
295 *pd_dma = dev->pdr_pa + sizeof(struct ce_pd) * idx;
296
297 return dev->pdr + sizeof(struct ce_pd) * idx;
298 }
299
300 /**
301 * alloc memory for the gather ring
302 * no need to alloc buf for the ring
303 * gdr_tail, gdr_head and gdr_count are initialized by this function
304 */
305 static u32 crypto4xx_build_gdr(struct crypto4xx_device *dev)
306 {
307 dev->gdr = dma_alloc_coherent(dev->core_dev->device,
308 sizeof(struct ce_gd) * PPC4XX_NUM_GD,
309 &dev->gdr_pa, GFP_ATOMIC);
310 if (!dev->gdr)
311 return -ENOMEM;
312
313 memset(dev->gdr, 0, sizeof(struct ce_gd) * PPC4XX_NUM_GD);
314
315 return 0;
316 }
317
318 static inline void crypto4xx_destroy_gdr(struct crypto4xx_device *dev)
319 {
320 dma_free_coherent(dev->core_dev->device,
321 sizeof(struct ce_gd) * PPC4XX_NUM_GD,
322 dev->gdr, dev->gdr_pa);
323 }
324
325 /*
326 * when this function is called.
327 * preemption or interrupt must be disabled
328 */
329 u32 crypto4xx_get_n_gd(struct crypto4xx_device *dev, int n)
330 {
331 u32 retval;
332 u32 tmp;
333 if (n >= PPC4XX_NUM_GD)
334 return ERING_WAS_FULL;
335
336 retval = dev->gdr_head;
337 tmp = (dev->gdr_head + n) % PPC4XX_NUM_GD;
338 if (dev->gdr_head > dev->gdr_tail) {
339 if (tmp < dev->gdr_head && tmp >= dev->gdr_tail)
340 return ERING_WAS_FULL;
341 } else if (dev->gdr_head < dev->gdr_tail) {
342 if (tmp < dev->gdr_head || tmp >= dev->gdr_tail)
343 return ERING_WAS_FULL;
344 }
345 dev->gdr_head = tmp;
346
347 return retval;
348 }
349
350 static u32 crypto4xx_put_gd_to_gdr(struct crypto4xx_device *dev)
351 {
352 unsigned long flags;
353
354 spin_lock_irqsave(&dev->core_dev->lock, flags);
355 if (dev->gdr_tail == dev->gdr_head) {
356 spin_unlock_irqrestore(&dev->core_dev->lock, flags);
357 return 0;
358 }
359
360 if (dev->gdr_tail != PPC4XX_LAST_GD)
361 dev->gdr_tail++;
362 else
363 dev->gdr_tail = 0;
364
365 spin_unlock_irqrestore(&dev->core_dev->lock, flags);
366
367 return 0;
368 }
369
370 static inline struct ce_gd *crypto4xx_get_gdp(struct crypto4xx_device *dev,
371 dma_addr_t *gd_dma, u32 idx)
372 {
373 *gd_dma = dev->gdr_pa + sizeof(struct ce_gd) * idx;
374
375 return (struct ce_gd *) (dev->gdr + sizeof(struct ce_gd) * idx);
376 }
377
378 /**
379 * alloc memory for the scatter ring
380 * need to alloc buf for the ring
381 * sdr_tail, sdr_head and sdr_count are initialized by this function
382 */
383 static u32 crypto4xx_build_sdr(struct crypto4xx_device *dev)
384 {
385 int i;
386 struct ce_sd *sd_array;
387
388 /* alloc memory for scatter descriptor ring */
389 dev->sdr = dma_alloc_coherent(dev->core_dev->device,
390 sizeof(struct ce_sd) * PPC4XX_NUM_SD,
391 &dev->sdr_pa, GFP_ATOMIC);
392 if (!dev->sdr)
393 return -ENOMEM;
394
395 dev->scatter_buffer_size = PPC4XX_SD_BUFFER_SIZE;
396 dev->scatter_buffer_va =
397 dma_alloc_coherent(dev->core_dev->device,
398 dev->scatter_buffer_size * PPC4XX_NUM_SD,
399 &dev->scatter_buffer_pa, GFP_ATOMIC);
400 if (!dev->scatter_buffer_va) {
401 dma_free_coherent(dev->core_dev->device,
402 sizeof(struct ce_sd) * PPC4XX_NUM_SD,
403 dev->sdr, dev->sdr_pa);
404 return -ENOMEM;
405 }
406
407 sd_array = dev->sdr;
408
409 for (i = 0; i < PPC4XX_NUM_SD; i++) {
410 sd_array[i].ptr = dev->scatter_buffer_pa +
411 dev->scatter_buffer_size * i;
412 }
413
414 return 0;
415 }
416
417 static void crypto4xx_destroy_sdr(struct crypto4xx_device *dev)
418 {
419 if (dev->sdr != NULL)
420 dma_free_coherent(dev->core_dev->device,
421 sizeof(struct ce_sd) * PPC4XX_NUM_SD,
422 dev->sdr, dev->sdr_pa);
423
424 if (dev->scatter_buffer_va != NULL)
425 dma_free_coherent(dev->core_dev->device,
426 dev->scatter_buffer_size * PPC4XX_NUM_SD,
427 dev->scatter_buffer_va,
428 dev->scatter_buffer_pa);
429 }
430
431 /*
432 * when this function is called.
433 * preemption or interrupt must be disabled
434 */
435 static u32 crypto4xx_get_n_sd(struct crypto4xx_device *dev, int n)
436 {
437 u32 retval;
438 u32 tmp;
439
440 if (n >= PPC4XX_NUM_SD)
441 return ERING_WAS_FULL;
442
443 retval = dev->sdr_head;
444 tmp = (dev->sdr_head + n) % PPC4XX_NUM_SD;
445 if (dev->sdr_head > dev->gdr_tail) {
446 if (tmp < dev->sdr_head && tmp >= dev->sdr_tail)
447 return ERING_WAS_FULL;
448 } else if (dev->sdr_head < dev->sdr_tail) {
449 if (tmp < dev->sdr_head || tmp >= dev->sdr_tail)
450 return ERING_WAS_FULL;
451 } /* the head = tail, or empty case is already take cared */
452 dev->sdr_head = tmp;
453
454 return retval;
455 }
456
457 static u32 crypto4xx_put_sd_to_sdr(struct crypto4xx_device *dev)
458 {
459 unsigned long flags;
460
461 spin_lock_irqsave(&dev->core_dev->lock, flags);
462 if (dev->sdr_tail == dev->sdr_head) {
463 spin_unlock_irqrestore(&dev->core_dev->lock, flags);
464 return 0;
465 }
466 if (dev->sdr_tail != PPC4XX_LAST_SD)
467 dev->sdr_tail++;
468 else
469 dev->sdr_tail = 0;
470 spin_unlock_irqrestore(&dev->core_dev->lock, flags);
471
472 return 0;
473 }
474
475 static inline struct ce_sd *crypto4xx_get_sdp(struct crypto4xx_device *dev,
476 dma_addr_t *sd_dma, u32 idx)
477 {
478 *sd_dma = dev->sdr_pa + sizeof(struct ce_sd) * idx;
479
480 return (struct ce_sd *)(dev->sdr + sizeof(struct ce_sd) * idx);
481 }
482
483 static u32 crypto4xx_fill_one_page(struct crypto4xx_device *dev,
484 dma_addr_t *addr, u32 *length,
485 u32 *idx, u32 *offset, u32 *nbytes)
486 {
487 u32 len;
488
489 if (*length > dev->scatter_buffer_size) {
490 memcpy(phys_to_virt(*addr),
491 dev->scatter_buffer_va +
492 *idx * dev->scatter_buffer_size + *offset,
493 dev->scatter_buffer_size);
494 *offset = 0;
495 *length -= dev->scatter_buffer_size;
496 *nbytes -= dev->scatter_buffer_size;
497 if (*idx == PPC4XX_LAST_SD)
498 *idx = 0;
499 else
500 (*idx)++;
501 *addr = *addr + dev->scatter_buffer_size;
502 return 1;
503 } else if (*length < dev->scatter_buffer_size) {
504 memcpy(phys_to_virt(*addr),
505 dev->scatter_buffer_va +
506 *idx * dev->scatter_buffer_size + *offset, *length);
507 if ((*offset + *length) == dev->scatter_buffer_size) {
508 if (*idx == PPC4XX_LAST_SD)
509 *idx = 0;
510 else
511 (*idx)++;
512 *nbytes -= *length;
513 *offset = 0;
514 } else {
515 *nbytes -= *length;
516 *offset += *length;
517 }
518
519 return 0;
520 } else {
521 len = (*nbytes <= dev->scatter_buffer_size) ?
522 (*nbytes) : dev->scatter_buffer_size;
523 memcpy(phys_to_virt(*addr),
524 dev->scatter_buffer_va +
525 *idx * dev->scatter_buffer_size + *offset,
526 len);
527 *offset = 0;
528 *nbytes -= len;
529
530 if (*idx == PPC4XX_LAST_SD)
531 *idx = 0;
532 else
533 (*idx)++;
534
535 return 0;
536 }
537 }
538
539 static void crypto4xx_copy_pkt_to_dst(struct crypto4xx_device *dev,
540 struct ce_pd *pd,
541 struct pd_uinfo *pd_uinfo,
542 u32 nbytes,
543 struct scatterlist *dst)
544 {
545 dma_addr_t addr;
546 u32 this_sd;
547 u32 offset;
548 u32 len;
549 u32 i;
550 u32 sg_len;
551 struct scatterlist *sg;
552
553 this_sd = pd_uinfo->first_sd;
554 offset = 0;
555 i = 0;
556
557 while (nbytes) {
558 sg = &dst[i];
559 sg_len = sg->length;
560 addr = dma_map_page(dev->core_dev->device, sg_page(sg),
561 sg->offset, sg->length, DMA_TO_DEVICE);
562
563 if (offset == 0) {
564 len = (nbytes <= sg->length) ? nbytes : sg->length;
565 while (crypto4xx_fill_one_page(dev, &addr, &len,
566 &this_sd, &offset, &nbytes))
567 ;
568 if (!nbytes)
569 return;
570 i++;
571 } else {
572 len = (nbytes <= (dev->scatter_buffer_size - offset)) ?
573 nbytes : (dev->scatter_buffer_size - offset);
574 len = (sg->length < len) ? sg->length : len;
575 while (crypto4xx_fill_one_page(dev, &addr, &len,
576 &this_sd, &offset, &nbytes))
577 ;
578 if (!nbytes)
579 return;
580 sg_len -= len;
581 if (sg_len) {
582 addr += len;
583 while (crypto4xx_fill_one_page(dev, &addr,
584 &sg_len, &this_sd, &offset, &nbytes))
585 ;
586 }
587 i++;
588 }
589 }
590 }
591
592 static u32 crypto4xx_copy_digest_to_dst(struct pd_uinfo *pd_uinfo,
593 struct crypto4xx_ctx *ctx)
594 {
595 struct dynamic_sa_ctl *sa = (struct dynamic_sa_ctl *) ctx->sa_in;
596 struct sa_state_record *state_record =
597 (struct sa_state_record *) pd_uinfo->sr_va;
598
599 if (sa->sa_command_0.bf.hash_alg == SA_HASH_ALG_SHA1) {
600 memcpy((void *) pd_uinfo->dest_va, state_record->save_digest,
601 SA_HASH_ALG_SHA1_DIGEST_SIZE);
602 }
603
604 return 0;
605 }
606
607 static void crypto4xx_ret_sg_desc(struct crypto4xx_device *dev,
608 struct pd_uinfo *pd_uinfo)
609 {
610 int i;
611 if (pd_uinfo->num_gd) {
612 for (i = 0; i < pd_uinfo->num_gd; i++)
613 crypto4xx_put_gd_to_gdr(dev);
614 pd_uinfo->first_gd = 0xffffffff;
615 pd_uinfo->num_gd = 0;
616 }
617 if (pd_uinfo->num_sd) {
618 for (i = 0; i < pd_uinfo->num_sd; i++)
619 crypto4xx_put_sd_to_sdr(dev);
620
621 pd_uinfo->first_sd = 0xffffffff;
622 pd_uinfo->num_sd = 0;
623 }
624 }
625
626 static u32 crypto4xx_ablkcipher_done(struct crypto4xx_device *dev,
627 struct pd_uinfo *pd_uinfo,
628 struct ce_pd *pd)
629 {
630 struct crypto4xx_ctx *ctx;
631 struct ablkcipher_request *ablk_req;
632 struct scatterlist *dst;
633 dma_addr_t addr;
634
635 ablk_req = ablkcipher_request_cast(pd_uinfo->async_req);
636 ctx = crypto_tfm_ctx(ablk_req->base.tfm);
637
638 if (pd_uinfo->using_sd) {
639 crypto4xx_copy_pkt_to_dst(dev, pd, pd_uinfo, ablk_req->nbytes,
640 ablk_req->dst);
641 } else {
642 dst = pd_uinfo->dest_va;
643 addr = dma_map_page(dev->core_dev->device, sg_page(dst),
644 dst->offset, dst->length, DMA_FROM_DEVICE);
645 }
646 crypto4xx_ret_sg_desc(dev, pd_uinfo);
647 if (ablk_req->base.complete != NULL)
648 ablk_req->base.complete(&ablk_req->base, 0);
649
650 return 0;
651 }
652
653 static u32 crypto4xx_ahash_done(struct crypto4xx_device *dev,
654 struct pd_uinfo *pd_uinfo)
655 {
656 struct crypto4xx_ctx *ctx;
657 struct ahash_request *ahash_req;
658
659 ahash_req = ahash_request_cast(pd_uinfo->async_req);
660 ctx = crypto_tfm_ctx(ahash_req->base.tfm);
661
662 crypto4xx_copy_digest_to_dst(pd_uinfo,
663 crypto_tfm_ctx(ahash_req->base.tfm));
664 crypto4xx_ret_sg_desc(dev, pd_uinfo);
665 /* call user provided callback function x */
666 if (ahash_req->base.complete != NULL)
667 ahash_req->base.complete(&ahash_req->base, 0);
668
669 return 0;
670 }
671
672 static u32 crypto4xx_pd_done(struct crypto4xx_device *dev, u32 idx)
673 {
674 struct ce_pd *pd;
675 struct pd_uinfo *pd_uinfo;
676
677 pd = dev->pdr + sizeof(struct ce_pd)*idx;
678 pd_uinfo = dev->pdr_uinfo + sizeof(struct pd_uinfo)*idx;
679 if (crypto_tfm_alg_type(pd_uinfo->async_req->tfm) ==
680 CRYPTO_ALG_TYPE_ABLKCIPHER)
681 return crypto4xx_ablkcipher_done(dev, pd_uinfo, pd);
682 else
683 return crypto4xx_ahash_done(dev, pd_uinfo);
684 }
685
686 /**
687 * Note: Only use this function to copy items that is word aligned.
688 */
689 void crypto4xx_memcpy_le(unsigned int *dst,
690 const unsigned char *buf,
691 int len)
692 {
693 u8 *tmp;
694 for (; len >= 4; buf += 4, len -= 4)
695 *dst++ = cpu_to_le32(*(unsigned int *) buf);
696
697 tmp = (u8 *)dst;
698 switch (len) {
699 case 3:
700 *tmp++ = 0;
701 *tmp++ = *(buf+2);
702 *tmp++ = *(buf+1);
703 *tmp++ = *buf;
704 break;
705 case 2:
706 *tmp++ = 0;
707 *tmp++ = 0;
708 *tmp++ = *(buf+1);
709 *tmp++ = *buf;
710 break;
711 case 1:
712 *tmp++ = 0;
713 *tmp++ = 0;
714 *tmp++ = 0;
715 *tmp++ = *buf;
716 break;
717 default:
718 break;
719 }
720 }
721
722 static void crypto4xx_stop_all(struct crypto4xx_core_device *core_dev)
723 {
724 crypto4xx_destroy_pdr(core_dev->dev);
725 crypto4xx_destroy_gdr(core_dev->dev);
726 crypto4xx_destroy_sdr(core_dev->dev);
727 iounmap(core_dev->dev->ce_base);
728 kfree(core_dev->dev);
729 kfree(core_dev);
730 }
731
732 void crypto4xx_return_pd(struct crypto4xx_device *dev,
733 u32 pd_entry, struct ce_pd *pd,
734 struct pd_uinfo *pd_uinfo)
735 {
736 /* irq should be already disabled */
737 dev->pdr_head = pd_entry;
738 pd->pd_ctl.w = 0;
739 pd->pd_ctl_len.w = 0;
740 pd_uinfo->state = PD_ENTRY_FREE;
741 }
742
743 static u32 get_next_gd(u32 current)
744 {
745 if (current != PPC4XX_LAST_GD)
746 return current + 1;
747 else
748 return 0;
749 }
750
751 static u32 get_next_sd(u32 current)
752 {
753 if (current != PPC4XX_LAST_SD)
754 return current + 1;
755 else
756 return 0;
757 }
758
759 u32 crypto4xx_build_pd(struct crypto_async_request *req,
760 struct crypto4xx_ctx *ctx,
761 struct scatterlist *src,
762 struct scatterlist *dst,
763 unsigned int datalen,
764 void *iv, u32 iv_len)
765 {
766 struct crypto4xx_device *dev = ctx->dev;
767 dma_addr_t addr, pd_dma, sd_dma, gd_dma;
768 struct dynamic_sa_ctl *sa;
769 struct scatterlist *sg;
770 struct ce_gd *gd;
771 struct ce_pd *pd;
772 u32 num_gd, num_sd;
773 u32 fst_gd = 0xffffffff;
774 u32 fst_sd = 0xffffffff;
775 u32 pd_entry;
776 unsigned long flags;
777 struct pd_uinfo *pd_uinfo = NULL;
778 unsigned int nbytes = datalen, idx;
779 unsigned int ivlen = 0;
780 u32 gd_idx = 0;
781
782 /* figure how many gd is needed */
783 num_gd = sg_nents_for_len(src, datalen);
784 if ((int)num_gd < 0) {
785 dev_err(dev->core_dev->device, "Invalid number of src SG.\n");
786 return -EINVAL;
787 }
788 if (num_gd == 1)
789 num_gd = 0;
790
791 /* figure how many sd is needed */
792 if (sg_is_last(dst) || ctx->is_hash) {
793 num_sd = 0;
794 } else {
795 if (datalen > PPC4XX_SD_BUFFER_SIZE) {
796 num_sd = datalen / PPC4XX_SD_BUFFER_SIZE;
797 if (datalen % PPC4XX_SD_BUFFER_SIZE)
798 num_sd++;
799 } else {
800 num_sd = 1;
801 }
802 }
803
804 /*
805 * The follow section of code needs to be protected
806 * The gather ring and scatter ring needs to be consecutive
807 * In case of run out of any kind of descriptor, the descriptor
808 * already got must be return the original place.
809 */
810 spin_lock_irqsave(&dev->core_dev->lock, flags);
811 if (num_gd) {
812 fst_gd = crypto4xx_get_n_gd(dev, num_gd);
813 if (fst_gd == ERING_WAS_FULL) {
814 spin_unlock_irqrestore(&dev->core_dev->lock, flags);
815 return -EAGAIN;
816 }
817 }
818 if (num_sd) {
819 fst_sd = crypto4xx_get_n_sd(dev, num_sd);
820 if (fst_sd == ERING_WAS_FULL) {
821 if (num_gd)
822 dev->gdr_head = fst_gd;
823 spin_unlock_irqrestore(&dev->core_dev->lock, flags);
824 return -EAGAIN;
825 }
826 }
827 pd_entry = crypto4xx_get_pd_from_pdr_nolock(dev);
828 if (pd_entry == ERING_WAS_FULL) {
829 if (num_gd)
830 dev->gdr_head = fst_gd;
831 if (num_sd)
832 dev->sdr_head = fst_sd;
833 spin_unlock_irqrestore(&dev->core_dev->lock, flags);
834 return -EAGAIN;
835 }
836 spin_unlock_irqrestore(&dev->core_dev->lock, flags);
837
838 pd_uinfo = (struct pd_uinfo *)(dev->pdr_uinfo +
839 sizeof(struct pd_uinfo) * pd_entry);
840 pd = crypto4xx_get_pdp(dev, &pd_dma, pd_entry);
841 pd_uinfo->async_req = req;
842 pd_uinfo->num_gd = num_gd;
843 pd_uinfo->num_sd = num_sd;
844
845 if (iv_len || ctx->is_hash) {
846 ivlen = iv_len;
847 pd->sa = pd_uinfo->sa_pa;
848 sa = (struct dynamic_sa_ctl *) pd_uinfo->sa_va;
849 if (ctx->direction == DIR_INBOUND)
850 memcpy(sa, ctx->sa_in, ctx->sa_len * 4);
851 else
852 memcpy(sa, ctx->sa_out, ctx->sa_len * 4);
853
854 memcpy((void *) sa + ctx->offset_to_sr_ptr,
855 &pd_uinfo->sr_pa, 4);
856
857 if (iv_len)
858 crypto4xx_memcpy_le(pd_uinfo->sr_va, iv, iv_len);
859 } else {
860 if (ctx->direction == DIR_INBOUND) {
861 pd->sa = ctx->sa_in_dma_addr;
862 sa = (struct dynamic_sa_ctl *) ctx->sa_in;
863 } else {
864 pd->sa = ctx->sa_out_dma_addr;
865 sa = (struct dynamic_sa_ctl *) ctx->sa_out;
866 }
867 }
868 pd->sa_len = ctx->sa_len;
869 if (num_gd) {
870 /* get first gd we are going to use */
871 gd_idx = fst_gd;
872 pd_uinfo->first_gd = fst_gd;
873 pd_uinfo->num_gd = num_gd;
874 gd = crypto4xx_get_gdp(dev, &gd_dma, gd_idx);
875 pd->src = gd_dma;
876 /* enable gather */
877 sa->sa_command_0.bf.gather = 1;
878 idx = 0;
879 src = &src[0];
880 /* walk the sg, and setup gather array */
881 while (nbytes) {
882 sg = &src[idx];
883 addr = dma_map_page(dev->core_dev->device, sg_page(sg),
884 sg->offset, sg->length, DMA_TO_DEVICE);
885 gd->ptr = addr;
886 gd->ctl_len.len = sg->length;
887 gd->ctl_len.done = 0;
888 gd->ctl_len.ready = 1;
889 if (sg->length >= nbytes)
890 break;
891 nbytes -= sg->length;
892 gd_idx = get_next_gd(gd_idx);
893 gd = crypto4xx_get_gdp(dev, &gd_dma, gd_idx);
894 idx++;
895 }
896 } else {
897 pd->src = (u32)dma_map_page(dev->core_dev->device, sg_page(src),
898 src->offset, src->length, DMA_TO_DEVICE);
899 /*
900 * Disable gather in sa command
901 */
902 sa->sa_command_0.bf.gather = 0;
903 /*
904 * Indicate gather array is not used
905 */
906 pd_uinfo->first_gd = 0xffffffff;
907 pd_uinfo->num_gd = 0;
908 }
909 if (ctx->is_hash || sg_is_last(dst)) {
910 /*
911 * we know application give us dst a whole piece of memory
912 * no need to use scatter ring.
913 * In case of is_hash, the icv is always at end of src data.
914 */
915 pd_uinfo->using_sd = 0;
916 pd_uinfo->first_sd = 0xffffffff;
917 pd_uinfo->num_sd = 0;
918 pd_uinfo->dest_va = dst;
919 sa->sa_command_0.bf.scatter = 0;
920 if (ctx->is_hash)
921 pd->dest = virt_to_phys((void *)dst);
922 else
923 pd->dest = (u32)dma_map_page(dev->core_dev->device,
924 sg_page(dst), dst->offset,
925 dst->length, DMA_TO_DEVICE);
926 } else {
927 struct ce_sd *sd = NULL;
928 u32 sd_idx = fst_sd;
929 nbytes = datalen;
930 sa->sa_command_0.bf.scatter = 1;
931 pd_uinfo->using_sd = 1;
932 pd_uinfo->dest_va = dst;
933 pd_uinfo->first_sd = fst_sd;
934 pd_uinfo->num_sd = num_sd;
935 sd = crypto4xx_get_sdp(dev, &sd_dma, sd_idx);
936 pd->dest = sd_dma;
937 /* setup scatter descriptor */
938 sd->ctl.done = 0;
939 sd->ctl.rdy = 1;
940 /* sd->ptr should be setup by sd_init routine*/
941 idx = 0;
942 if (nbytes >= PPC4XX_SD_BUFFER_SIZE)
943 nbytes -= PPC4XX_SD_BUFFER_SIZE;
944 else
945 nbytes = 0;
946 while (nbytes) {
947 sd_idx = get_next_sd(sd_idx);
948 sd = crypto4xx_get_sdp(dev, &sd_dma, sd_idx);
949 /* setup scatter descriptor */
950 sd->ctl.done = 0;
951 sd->ctl.rdy = 1;
952 if (nbytes >= PPC4XX_SD_BUFFER_SIZE)
953 nbytes -= PPC4XX_SD_BUFFER_SIZE;
954 else
955 /*
956 * SD entry can hold PPC4XX_SD_BUFFER_SIZE,
957 * which is more than nbytes, so done.
958 */
959 nbytes = 0;
960 }
961 }
962
963 sa->sa_command_1.bf.hash_crypto_offset = 0;
964 pd->pd_ctl.w = ctx->pd_ctl;
965 pd->pd_ctl_len.w = 0x00400000 | (ctx->bypass << 24) | datalen;
966 pd_uinfo->state = PD_ENTRY_INUSE;
967 wmb();
968 /* write any value to push engine to read a pd */
969 writel(1, dev->ce_base + CRYPTO4XX_INT_DESCR_RD);
970 return -EINPROGRESS;
971 }
972
973 /**
974 * Algorithm Registration Functions
975 */
976 static int crypto4xx_alg_init(struct crypto_tfm *tfm)
977 {
978 struct crypto_alg *alg = tfm->__crt_alg;
979 struct crypto4xx_alg *amcc_alg = crypto_alg_to_crypto4xx_alg(alg);
980 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
981
982 ctx->dev = amcc_alg->dev;
983 ctx->sa_in = NULL;
984 ctx->sa_out = NULL;
985 ctx->sa_in_dma_addr = 0;
986 ctx->sa_out_dma_addr = 0;
987 ctx->sa_len = 0;
988
989 switch (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) {
990 default:
991 tfm->crt_ablkcipher.reqsize = sizeof(struct crypto4xx_ctx);
992 break;
993 case CRYPTO_ALG_TYPE_AHASH:
994 crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
995 sizeof(struct crypto4xx_ctx));
996 break;
997 }
998
999 return 0;
1000 }
1001
1002 static void crypto4xx_alg_exit(struct crypto_tfm *tfm)
1003 {
1004 struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
1005
1006 crypto4xx_free_sa(ctx);
1007 crypto4xx_free_state_record(ctx);
1008 }
1009
1010 int crypto4xx_register_alg(struct crypto4xx_device *sec_dev,
1011 struct crypto4xx_alg_common *crypto_alg,
1012 int array_size)
1013 {
1014 struct crypto4xx_alg *alg;
1015 int i;
1016 int rc = 0;
1017
1018 for (i = 0; i < array_size; i++) {
1019 alg = kzalloc(sizeof(struct crypto4xx_alg), GFP_KERNEL);
1020 if (!alg)
1021 return -ENOMEM;
1022
1023 alg->alg = crypto_alg[i];
1024 alg->dev = sec_dev;
1025
1026 switch (alg->alg.type) {
1027 case CRYPTO_ALG_TYPE_AHASH:
1028 rc = crypto_register_ahash(&alg->alg.u.hash);
1029 break;
1030
1031 default:
1032 rc = crypto_register_alg(&alg->alg.u.cipher);
1033 break;
1034 }
1035
1036 if (rc) {
1037 list_del(&alg->entry);
1038 kfree(alg);
1039 } else {
1040 list_add_tail(&alg->entry, &sec_dev->alg_list);
1041 }
1042 }
1043
1044 return 0;
1045 }
1046
1047 static void crypto4xx_unregister_alg(struct crypto4xx_device *sec_dev)
1048 {
1049 struct crypto4xx_alg *alg, *tmp;
1050
1051 list_for_each_entry_safe(alg, tmp, &sec_dev->alg_list, entry) {
1052 list_del(&alg->entry);
1053 switch (alg->alg.type) {
1054 case CRYPTO_ALG_TYPE_AHASH:
1055 crypto_unregister_ahash(&alg->alg.u.hash);
1056 break;
1057
1058 default:
1059 crypto_unregister_alg(&alg->alg.u.cipher);
1060 }
1061 kfree(alg);
1062 }
1063 }
1064
1065 static void crypto4xx_bh_tasklet_cb(unsigned long data)
1066 {
1067 struct device *dev = (struct device *)data;
1068 struct crypto4xx_core_device *core_dev = dev_get_drvdata(dev);
1069 struct pd_uinfo *pd_uinfo;
1070 struct ce_pd *pd;
1071 u32 tail;
1072
1073 while (core_dev->dev->pdr_head != core_dev->dev->pdr_tail) {
1074 tail = core_dev->dev->pdr_tail;
1075 pd_uinfo = core_dev->dev->pdr_uinfo +
1076 sizeof(struct pd_uinfo)*tail;
1077 pd = core_dev->dev->pdr + sizeof(struct ce_pd) * tail;
1078 if ((pd_uinfo->state == PD_ENTRY_INUSE) &&
1079 pd->pd_ctl.bf.pe_done &&
1080 !pd->pd_ctl.bf.host_ready) {
1081 pd->pd_ctl.bf.pe_done = 0;
1082 crypto4xx_pd_done(core_dev->dev, tail);
1083 crypto4xx_put_pd_to_pdr(core_dev->dev, tail);
1084 pd_uinfo->state = PD_ENTRY_FREE;
1085 } else {
1086 /* if tail not done, break */
1087 break;
1088 }
1089 }
1090 }
1091
1092 /**
1093 * Top Half of isr.
1094 */
1095 static irqreturn_t crypto4xx_ce_interrupt_handler(int irq, void *data)
1096 {
1097 struct device *dev = (struct device *)data;
1098 struct crypto4xx_core_device *core_dev = dev_get_drvdata(dev);
1099
1100 if (!core_dev->dev->ce_base)
1101 return 0;
1102
1103 writel(PPC4XX_INTERRUPT_CLR,
1104 core_dev->dev->ce_base + CRYPTO4XX_INT_CLR);
1105 tasklet_schedule(&core_dev->tasklet);
1106
1107 return IRQ_HANDLED;
1108 }
1109
1110 /**
1111 * Supported Crypto Algorithms
1112 */
1113 struct crypto4xx_alg_common crypto4xx_alg[] = {
1114 /* Crypto AES modes */
1115 { .type = CRYPTO_ALG_TYPE_ABLKCIPHER, .u.cipher = {
1116 .cra_name = "cbc(aes)",
1117 .cra_driver_name = "cbc-aes-ppc4xx",
1118 .cra_priority = CRYPTO4XX_CRYPTO_PRIORITY,
1119 .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
1120 .cra_blocksize = AES_BLOCK_SIZE,
1121 .cra_ctxsize = sizeof(struct crypto4xx_ctx),
1122 .cra_type = &crypto_ablkcipher_type,
1123 .cra_init = crypto4xx_alg_init,
1124 .cra_exit = crypto4xx_alg_exit,
1125 .cra_module = THIS_MODULE,
1126 .cra_u = {
1127 .ablkcipher = {
1128 .min_keysize = AES_MIN_KEY_SIZE,
1129 .max_keysize = AES_MAX_KEY_SIZE,
1130 .ivsize = AES_IV_SIZE,
1131 .setkey = crypto4xx_setkey_aes_cbc,
1132 .encrypt = crypto4xx_encrypt,
1133 .decrypt = crypto4xx_decrypt,
1134 }
1135 }
1136 }},
1137 };
1138
1139 /**
1140 * Module Initialization Routine
1141 */
1142 static int crypto4xx_probe(struct platform_device *ofdev)
1143 {
1144 int rc;
1145 struct resource res;
1146 struct device *dev = &ofdev->dev;
1147 struct crypto4xx_core_device *core_dev;
1148
1149 rc = of_address_to_resource(ofdev->dev.of_node, 0, &res);
1150 if (rc)
1151 return -ENODEV;
1152
1153 if (of_find_compatible_node(NULL, NULL, "amcc,ppc460ex-crypto")) {
1154 mtdcri(SDR0, PPC460EX_SDR0_SRST,
1155 mfdcri(SDR0, PPC460EX_SDR0_SRST) | PPC460EX_CE_RESET);
1156 mtdcri(SDR0, PPC460EX_SDR0_SRST,
1157 mfdcri(SDR0, PPC460EX_SDR0_SRST) & ~PPC460EX_CE_RESET);
1158 } else if (of_find_compatible_node(NULL, NULL,
1159 "amcc,ppc405ex-crypto")) {
1160 mtdcri(SDR0, PPC405EX_SDR0_SRST,
1161 mfdcri(SDR0, PPC405EX_SDR0_SRST) | PPC405EX_CE_RESET);
1162 mtdcri(SDR0, PPC405EX_SDR0_SRST,
1163 mfdcri(SDR0, PPC405EX_SDR0_SRST) & ~PPC405EX_CE_RESET);
1164 } else if (of_find_compatible_node(NULL, NULL,
1165 "amcc,ppc460sx-crypto")) {
1166 mtdcri(SDR0, PPC460SX_SDR0_SRST,
1167 mfdcri(SDR0, PPC460SX_SDR0_SRST) | PPC460SX_CE_RESET);
1168 mtdcri(SDR0, PPC460SX_SDR0_SRST,
1169 mfdcri(SDR0, PPC460SX_SDR0_SRST) & ~PPC460SX_CE_RESET);
1170 } else {
1171 printk(KERN_ERR "Crypto Function Not supported!\n");
1172 return -EINVAL;
1173 }
1174
1175 core_dev = kzalloc(sizeof(struct crypto4xx_core_device), GFP_KERNEL);
1176 if (!core_dev)
1177 return -ENOMEM;
1178
1179 dev_set_drvdata(dev, core_dev);
1180 core_dev->ofdev = ofdev;
1181 core_dev->dev = kzalloc(sizeof(struct crypto4xx_device), GFP_KERNEL);
1182 rc = -ENOMEM;
1183 if (!core_dev->dev)
1184 goto err_alloc_dev;
1185
1186 core_dev->dev->core_dev = core_dev;
1187 core_dev->device = dev;
1188 spin_lock_init(&core_dev->lock);
1189 INIT_LIST_HEAD(&core_dev->dev->alg_list);
1190 rc = crypto4xx_build_pdr(core_dev->dev);
1191 if (rc)
1192 goto err_build_pdr;
1193
1194 rc = crypto4xx_build_gdr(core_dev->dev);
1195 if (rc)
1196 goto err_build_gdr;
1197
1198 rc = crypto4xx_build_sdr(core_dev->dev);
1199 if (rc)
1200 goto err_build_sdr;
1201
1202 /* Init tasklet for bottom half processing */
1203 tasklet_init(&core_dev->tasklet, crypto4xx_bh_tasklet_cb,
1204 (unsigned long) dev);
1205
1206 /* Register for Crypto isr, Crypto Engine IRQ */
1207 core_dev->irq = irq_of_parse_and_map(ofdev->dev.of_node, 0);
1208 rc = request_irq(core_dev->irq, crypto4xx_ce_interrupt_handler, 0,
1209 core_dev->dev->name, dev);
1210 if (rc)
1211 goto err_request_irq;
1212
1213 core_dev->dev->ce_base = of_iomap(ofdev->dev.of_node, 0);
1214 if (!core_dev->dev->ce_base) {
1215 dev_err(dev, "failed to of_iomap\n");
1216 rc = -ENOMEM;
1217 goto err_iomap;
1218 }
1219
1220 /* need to setup pdr, rdr, gdr and sdr before this */
1221 crypto4xx_hw_init(core_dev->dev);
1222
1223 /* Register security algorithms with Linux CryptoAPI */
1224 rc = crypto4xx_register_alg(core_dev->dev, crypto4xx_alg,
1225 ARRAY_SIZE(crypto4xx_alg));
1226 if (rc)
1227 goto err_start_dev;
1228
1229 ppc4xx_trng_probe(core_dev);
1230 return 0;
1231
1232 err_start_dev:
1233 iounmap(core_dev->dev->ce_base);
1234 err_iomap:
1235 free_irq(core_dev->irq, dev);
1236 err_request_irq:
1237 irq_dispose_mapping(core_dev->irq);
1238 tasklet_kill(&core_dev->tasklet);
1239 crypto4xx_destroy_sdr(core_dev->dev);
1240 err_build_sdr:
1241 crypto4xx_destroy_gdr(core_dev->dev);
1242 err_build_gdr:
1243 crypto4xx_destroy_pdr(core_dev->dev);
1244 err_build_pdr:
1245 kfree(core_dev->dev);
1246 err_alloc_dev:
1247 kfree(core_dev);
1248
1249 return rc;
1250 }
1251
1252 static int crypto4xx_remove(struct platform_device *ofdev)
1253 {
1254 struct device *dev = &ofdev->dev;
1255 struct crypto4xx_core_device *core_dev = dev_get_drvdata(dev);
1256
1257 ppc4xx_trng_remove(core_dev);
1258
1259 free_irq(core_dev->irq, dev);
1260 irq_dispose_mapping(core_dev->irq);
1261
1262 tasklet_kill(&core_dev->tasklet);
1263 /* Un-register with Linux CryptoAPI */
1264 crypto4xx_unregister_alg(core_dev->dev);
1265 /* Free all allocated memory */
1266 crypto4xx_stop_all(core_dev);
1267
1268 return 0;
1269 }
1270
1271 static const struct of_device_id crypto4xx_match[] = {
1272 { .compatible = "amcc,ppc4xx-crypto",},
1273 { },
1274 };
1275 MODULE_DEVICE_TABLE(of, crypto4xx_match);
1276
1277 static struct platform_driver crypto4xx_driver = {
1278 .driver = {
1279 .name = MODULE_NAME,
1280 .of_match_table = crypto4xx_match,
1281 },
1282 .probe = crypto4xx_probe,
1283 .remove = crypto4xx_remove,
1284 };
1285
1286 module_platform_driver(crypto4xx_driver);
1287
1288 MODULE_LICENSE("GPL");
1289 MODULE_AUTHOR("James Hsiao <jhsiao@amcc.com>");
1290 MODULE_DESCRIPTION("Driver for AMCC PPC4xx crypto accelerator");
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