aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/crypto/caam/caamalg.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/crypto/caam/caamalg.c')
-rw-r--r--drivers/crypto/caam/caamalg.c1268
1 files changed, 1268 insertions, 0 deletions
diff --git a/drivers/crypto/caam/caamalg.c b/drivers/crypto/caam/caamalg.c
new file mode 100644
index 000000000000..d0e65d6ddc77
--- /dev/null
+++ b/drivers/crypto/caam/caamalg.c
@@ -0,0 +1,1268 @@
1/*
2 * caam - Freescale FSL CAAM support for crypto API
3 *
4 * Copyright 2008-2011 Freescale Semiconductor, Inc.
5 *
6 * Based on talitos crypto API driver.
7 *
8 * relationship of job descriptors to shared descriptors (SteveC Dec 10 2008):
9 *
10 * --------------- ---------------
11 * | JobDesc #1 |-------------------->| ShareDesc |
12 * | *(packet 1) | | (PDB) |
13 * --------------- |------------->| (hashKey) |
14 * . | | (cipherKey) |
15 * . | |-------->| (operation) |
16 * --------------- | | ---------------
17 * | JobDesc #2 |------| |
18 * | *(packet 2) | |
19 * --------------- |
20 * . |
21 * . |
22 * --------------- |
23 * | JobDesc #3 |------------
24 * | *(packet 3) |
25 * ---------------
26 *
27 * The SharedDesc never changes for a connection unless rekeyed, but
28 * each packet will likely be in a different place. So all we need
29 * to know to process the packet is where the input is, where the
30 * output goes, and what context we want to process with. Context is
31 * in the SharedDesc, packet references in the JobDesc.
32 *
33 * So, a job desc looks like:
34 *
35 * ---------------------
36 * | Header |
37 * | ShareDesc Pointer |
38 * | SEQ_OUT_PTR |
39 * | (output buffer) |
40 * | SEQ_IN_PTR |
41 * | (input buffer) |
42 * | LOAD (to DECO) |
43 * ---------------------
44 */
45
46#include "compat.h"
47
48#include "regs.h"
49#include "intern.h"
50#include "desc_constr.h"
51#include "jr.h"
52#include "error.h"
53
54/*
55 * crypto alg
56 */
57#define CAAM_CRA_PRIORITY 3000
58/* max key is sum of AES_MAX_KEY_SIZE, max split key size */
59#define CAAM_MAX_KEY_SIZE (AES_MAX_KEY_SIZE + \
60 SHA512_DIGEST_SIZE * 2)
61/* max IV is max of AES_BLOCK_SIZE, DES3_EDE_BLOCK_SIZE */
62#define CAAM_MAX_IV_LENGTH 16
63
64/* length of descriptors text */
65#define DESC_AEAD_SHARED_TEXT_LEN 4
66#define DESC_AEAD_ENCRYPT_TEXT_LEN 21
67#define DESC_AEAD_DECRYPT_TEXT_LEN 24
68#define DESC_AEAD_GIVENCRYPT_TEXT_LEN 27
69
70#ifdef DEBUG
71/* for print_hex_dumps with line references */
72#define xstr(s) str(s)
73#define str(s) #s
74#define debug(format, arg...) printk(format, arg)
75#else
76#define debug(format, arg...)
77#endif
78
79/*
80 * per-session context
81 */
82struct caam_ctx {
83 struct device *jrdev;
84 u32 *sh_desc;
85 dma_addr_t shared_desc_phys;
86 u32 class1_alg_type;
87 u32 class2_alg_type;
88 u32 alg_op;
89 u8 *key;
90 dma_addr_t key_phys;
91 unsigned int enckeylen;
92 unsigned int split_key_len;
93 unsigned int split_key_pad_len;
94 unsigned int authsize;
95};
96
97static int aead_authenc_setauthsize(struct crypto_aead *authenc,
98 unsigned int authsize)
99{
100 struct caam_ctx *ctx = crypto_aead_ctx(authenc);
101
102 ctx->authsize = authsize;
103
104 return 0;
105}
106
107struct split_key_result {
108 struct completion completion;
109 int err;
110};
111
112static void split_key_done(struct device *dev, u32 *desc, u32 err,
113 void *context)
114{
115 struct split_key_result *res = context;
116
117#ifdef DEBUG
118 dev_err(dev, "%s %d: err 0x%x\n", __func__, __LINE__, err);
119#endif
120 if (err) {
121 char tmp[CAAM_ERROR_STR_MAX];
122
123 dev_err(dev, "%08x: %s\n", err, caam_jr_strstatus(tmp, err));
124 }
125
126 res->err = err;
127
128 complete(&res->completion);
129}
130
131/*
132get a split ipad/opad key
133
134Split key generation-----------------------------------------------
135
136[00] 0xb0810008 jobdesc: stidx=1 share=never len=8
137[01] 0x04000014 key: class2->keyreg len=20
138 @0xffe01000
139[03] 0x84410014 operation: cls2-op sha1 hmac init dec
140[04] 0x24940000 fifold: class2 msgdata-last2 len=0 imm
141[05] 0xa4000001 jump: class2 local all ->1 [06]
142[06] 0x64260028 fifostr: class2 mdsplit-jdk len=40
143 @0xffe04000
144*/
145static u32 gen_split_key(struct caam_ctx *ctx, const u8 *key_in, u32 authkeylen)
146{
147 struct device *jrdev = ctx->jrdev;
148 u32 *desc;
149 struct split_key_result result;
150 dma_addr_t dma_addr_in, dma_addr_out;
151 int ret = 0;
152
153 desc = kmalloc(CAAM_CMD_SZ * 6 + CAAM_PTR_SZ * 2, GFP_KERNEL | GFP_DMA);
154
155 init_job_desc(desc, 0);
156
157 dma_addr_in = dma_map_single(jrdev, (void *)key_in, authkeylen,
158 DMA_TO_DEVICE);
159 if (dma_mapping_error(jrdev, dma_addr_in)) {
160 dev_err(jrdev, "unable to map key input memory\n");
161 kfree(desc);
162 return -ENOMEM;
163 }
164 append_key(desc, dma_addr_in, authkeylen, CLASS_2 |
165 KEY_DEST_CLASS_REG);
166
167 /* Sets MDHA up into an HMAC-INIT */
168 append_operation(desc, ctx->alg_op | OP_ALG_DECRYPT |
169 OP_ALG_AS_INIT);
170
171 /*
172 * do a FIFO_LOAD of zero, this will trigger the internal key expansion
173 into both pads inside MDHA
174 */
175 append_fifo_load_as_imm(desc, NULL, 0, LDST_CLASS_2_CCB |
176 FIFOLD_TYPE_MSG | FIFOLD_TYPE_LAST2);
177
178 /*
179 * FIFO_STORE with the explicit split-key content store
180 * (0x26 output type)
181 */
182 dma_addr_out = dma_map_single(jrdev, ctx->key, ctx->split_key_pad_len,
183 DMA_FROM_DEVICE);
184 if (dma_mapping_error(jrdev, dma_addr_out)) {
185 dev_err(jrdev, "unable to map key output memory\n");
186 kfree(desc);
187 return -ENOMEM;
188 }
189 append_fifo_store(desc, dma_addr_out, ctx->split_key_len,
190 LDST_CLASS_2_CCB | FIFOST_TYPE_SPLIT_KEK);
191
192#ifdef DEBUG
193 print_hex_dump(KERN_ERR, "ctx.key@"xstr(__LINE__)": ",
194 DUMP_PREFIX_ADDRESS, 16, 4, key_in, authkeylen, 1);
195 print_hex_dump(KERN_ERR, "jobdesc@"xstr(__LINE__)": ",
196 DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
197#endif
198
199 result.err = 0;
200 init_completion(&result.completion);
201
202 ret = caam_jr_enqueue(jrdev, desc, split_key_done, &result);
203 if (!ret) {
204 /* in progress */
205 wait_for_completion_interruptible(&result.completion);
206 ret = result.err;
207#ifdef DEBUG
208 print_hex_dump(KERN_ERR, "ctx.key@"xstr(__LINE__)": ",
209 DUMP_PREFIX_ADDRESS, 16, 4, ctx->key,
210 ctx->split_key_pad_len, 1);
211#endif
212 }
213
214 dma_unmap_single(jrdev, dma_addr_out, ctx->split_key_pad_len,
215 DMA_FROM_DEVICE);
216 dma_unmap_single(jrdev, dma_addr_in, authkeylen, DMA_TO_DEVICE);
217
218 kfree(desc);
219
220 return ret;
221}
222
223static int build_sh_desc_ipsec(struct caam_ctx *ctx)
224{
225 struct device *jrdev = ctx->jrdev;
226 u32 *sh_desc;
227 u32 *jump_cmd;
228 bool keys_fit_inline = 0;
229
230 /*
231 * largest Job Descriptor and its Shared Descriptor
232 * must both fit into the 64-word Descriptor h/w Buffer
233 */
234 if ((DESC_AEAD_GIVENCRYPT_TEXT_LEN +
235 DESC_AEAD_SHARED_TEXT_LEN) * CAAM_CMD_SZ +
236 ctx->split_key_pad_len + ctx->enckeylen <= CAAM_DESC_BYTES_MAX)
237 keys_fit_inline = 1;
238
239 /* build shared descriptor for this session */
240 sh_desc = kmalloc(CAAM_CMD_SZ * DESC_AEAD_SHARED_TEXT_LEN +
241 keys_fit_inline ?
242 ctx->split_key_pad_len + ctx->enckeylen :
243 CAAM_PTR_SZ * 2, GFP_DMA | GFP_KERNEL);
244 if (!sh_desc) {
245 dev_err(jrdev, "could not allocate shared descriptor\n");
246 return -ENOMEM;
247 }
248
249 init_sh_desc(sh_desc, HDR_SAVECTX | HDR_SHARE_SERIAL);
250
251 jump_cmd = append_jump(sh_desc, CLASS_BOTH | JUMP_TEST_ALL |
252 JUMP_COND_SHRD | JUMP_COND_SELF);
253
254 /*
255 * process keys, starting with class 2/authentication.
256 */
257 if (keys_fit_inline) {
258 append_key_as_imm(sh_desc, ctx->key, ctx->split_key_pad_len,
259 ctx->split_key_len,
260 CLASS_2 | KEY_DEST_MDHA_SPLIT | KEY_ENC);
261
262 append_key_as_imm(sh_desc, (void *)ctx->key +
263 ctx->split_key_pad_len, ctx->enckeylen,
264 ctx->enckeylen, CLASS_1 | KEY_DEST_CLASS_REG);
265 } else {
266 append_key(sh_desc, ctx->key_phys, ctx->split_key_len, CLASS_2 |
267 KEY_DEST_MDHA_SPLIT | KEY_ENC);
268 append_key(sh_desc, ctx->key_phys + ctx->split_key_pad_len,
269 ctx->enckeylen, CLASS_1 | KEY_DEST_CLASS_REG);
270 }
271
272 /* update jump cmd now that we are at the jump target */
273 set_jump_tgt_here(sh_desc, jump_cmd);
274
275 ctx->shared_desc_phys = dma_map_single(jrdev, sh_desc,
276 desc_bytes(sh_desc),
277 DMA_TO_DEVICE);
278 if (dma_mapping_error(jrdev, ctx->shared_desc_phys)) {
279 dev_err(jrdev, "unable to map shared descriptor\n");
280 kfree(sh_desc);
281 return -ENOMEM;
282 }
283
284 ctx->sh_desc = sh_desc;
285
286 return 0;
287}
288
289static int aead_authenc_setkey(struct crypto_aead *aead,
290 const u8 *key, unsigned int keylen)
291{
292 /* Sizes for MDHA pads (*not* keys): MD5, SHA1, 224, 256, 384, 512 */
293 static const u8 mdpadlen[] = { 16, 20, 32, 32, 64, 64 };
294 struct caam_ctx *ctx = crypto_aead_ctx(aead);
295 struct device *jrdev = ctx->jrdev;
296 struct rtattr *rta = (void *)key;
297 struct crypto_authenc_key_param *param;
298 unsigned int authkeylen;
299 unsigned int enckeylen;
300 int ret = 0;
301
302 param = RTA_DATA(rta);
303 enckeylen = be32_to_cpu(param->enckeylen);
304
305 key += RTA_ALIGN(rta->rta_len);
306 keylen -= RTA_ALIGN(rta->rta_len);
307
308 if (keylen < enckeylen)
309 goto badkey;
310
311 authkeylen = keylen - enckeylen;
312
313 if (keylen > CAAM_MAX_KEY_SIZE)
314 goto badkey;
315
316 /* Pick class 2 key length from algorithm submask */
317 ctx->split_key_len = mdpadlen[(ctx->alg_op & OP_ALG_ALGSEL_SUBMASK) >>
318 OP_ALG_ALGSEL_SHIFT] * 2;
319 ctx->split_key_pad_len = ALIGN(ctx->split_key_len, 16);
320
321#ifdef DEBUG
322 printk(KERN_ERR "keylen %d enckeylen %d authkeylen %d\n",
323 keylen, enckeylen, authkeylen);
324 printk(KERN_ERR "split_key_len %d split_key_pad_len %d\n",
325 ctx->split_key_len, ctx->split_key_pad_len);
326 print_hex_dump(KERN_ERR, "key in @"xstr(__LINE__)": ",
327 DUMP_PREFIX_ADDRESS, 16, 4, key, keylen, 1);
328#endif
329 ctx->key = kmalloc(ctx->split_key_pad_len + enckeylen,
330 GFP_KERNEL | GFP_DMA);
331 if (!ctx->key) {
332 dev_err(jrdev, "could not allocate key output memory\n");
333 return -ENOMEM;
334 }
335
336 ret = gen_split_key(ctx, key, authkeylen);
337 if (ret) {
338 kfree(ctx->key);
339 goto badkey;
340 }
341
342 /* postpend encryption key to auth split key */
343 memcpy(ctx->key + ctx->split_key_pad_len, key + authkeylen, enckeylen);
344
345 ctx->key_phys = dma_map_single(jrdev, ctx->key, ctx->split_key_pad_len +
346 enckeylen, DMA_TO_DEVICE);
347 if (dma_mapping_error(jrdev, ctx->key_phys)) {
348 dev_err(jrdev, "unable to map key i/o memory\n");
349 kfree(ctx->key);
350 return -ENOMEM;
351 }
352#ifdef DEBUG
353 print_hex_dump(KERN_ERR, "ctx.key@"xstr(__LINE__)": ",
354 DUMP_PREFIX_ADDRESS, 16, 4, ctx->key,
355 ctx->split_key_pad_len + enckeylen, 1);
356#endif
357
358 ctx->enckeylen = enckeylen;
359
360 ret = build_sh_desc_ipsec(ctx);
361 if (ret) {
362 dma_unmap_single(jrdev, ctx->key_phys, ctx->split_key_pad_len +
363 enckeylen, DMA_TO_DEVICE);
364 kfree(ctx->key);
365 }
366
367 return ret;
368badkey:
369 crypto_aead_set_flags(aead, CRYPTO_TFM_RES_BAD_KEY_LEN);
370 return -EINVAL;
371}
372
373struct link_tbl_entry {
374 u64 ptr;
375 u32 len;
376 u8 reserved;
377 u8 buf_pool_id;
378 u16 offset;
379};
380
381/*
382 * ipsec_esp_edesc - s/w-extended ipsec_esp descriptor
383 * @src_nents: number of segments in input scatterlist
384 * @dst_nents: number of segments in output scatterlist
385 * @assoc_nents: number of segments in associated data (SPI+Seq) scatterlist
386 * @desc: h/w descriptor (variable length; must not exceed MAX_CAAM_DESCSIZE)
387 * @link_tbl_bytes: length of dma mapped link_tbl space
388 * @link_tbl_dma: bus physical mapped address of h/w link table
389 * @hw_desc: the h/w job descriptor followed by any referenced link tables
390 */
391struct ipsec_esp_edesc {
392 int assoc_nents;
393 int src_nents;
394 int dst_nents;
395 int link_tbl_bytes;
396 dma_addr_t link_tbl_dma;
397 struct link_tbl_entry *link_tbl;
398 u32 hw_desc[0];
399};
400
401static void ipsec_esp_unmap(struct device *dev,
402 struct ipsec_esp_edesc *edesc,
403 struct aead_request *areq)
404{
405 dma_unmap_sg(dev, areq->assoc, edesc->assoc_nents, DMA_TO_DEVICE);
406
407 if (unlikely(areq->dst != areq->src)) {
408 dma_unmap_sg(dev, areq->src, edesc->src_nents,
409 DMA_TO_DEVICE);
410 dma_unmap_sg(dev, areq->dst, edesc->dst_nents,
411 DMA_FROM_DEVICE);
412 } else {
413 dma_unmap_sg(dev, areq->src, edesc->src_nents,
414 DMA_BIDIRECTIONAL);
415 }
416
417 if (edesc->link_tbl_bytes)
418 dma_unmap_single(dev, edesc->link_tbl_dma,
419 edesc->link_tbl_bytes,
420 DMA_TO_DEVICE);
421}
422
423/*
424 * ipsec_esp descriptor callbacks
425 */
426static void ipsec_esp_encrypt_done(struct device *jrdev, u32 *desc, u32 err,
427 void *context)
428{
429 struct aead_request *areq = context;
430 struct ipsec_esp_edesc *edesc;
431#ifdef DEBUG
432 struct crypto_aead *aead = crypto_aead_reqtfm(areq);
433 int ivsize = crypto_aead_ivsize(aead);
434 struct caam_ctx *ctx = crypto_aead_ctx(aead);
435
436 dev_err(jrdev, "%s %d: err 0x%x\n", __func__, __LINE__, err);
437#endif
438 edesc = (struct ipsec_esp_edesc *)((char *)desc -
439 offsetof(struct ipsec_esp_edesc, hw_desc));
440
441 if (err) {
442 char tmp[CAAM_ERROR_STR_MAX];
443
444 dev_err(jrdev, "%08x: %s\n", err, caam_jr_strstatus(tmp, err));
445 }
446
447 ipsec_esp_unmap(jrdev, edesc, areq);
448
449#ifdef DEBUG
450 print_hex_dump(KERN_ERR, "assoc @"xstr(__LINE__)": ",
451 DUMP_PREFIX_ADDRESS, 16, 4, sg_virt(areq->assoc),
452 areq->assoclen , 1);
453 print_hex_dump(KERN_ERR, "dstiv @"xstr(__LINE__)": ",
454 DUMP_PREFIX_ADDRESS, 16, 4, sg_virt(areq->src) - ivsize,
455 edesc->src_nents ? 100 : ivsize, 1);
456 print_hex_dump(KERN_ERR, "dst @"xstr(__LINE__)": ",
457 DUMP_PREFIX_ADDRESS, 16, 4, sg_virt(areq->src),
458 edesc->src_nents ? 100 : areq->cryptlen +
459 ctx->authsize + 4, 1);
460#endif
461
462 kfree(edesc);
463
464 aead_request_complete(areq, err);
465}
466
467static void ipsec_esp_decrypt_done(struct device *jrdev, u32 *desc, u32 err,
468 void *context)
469{
470 struct aead_request *areq = context;
471 struct ipsec_esp_edesc *edesc;
472#ifdef DEBUG
473 struct crypto_aead *aead = crypto_aead_reqtfm(areq);
474 struct caam_ctx *ctx = crypto_aead_ctx(aead);
475
476 dev_err(jrdev, "%s %d: err 0x%x\n", __func__, __LINE__, err);
477#endif
478 edesc = (struct ipsec_esp_edesc *)((char *)desc -
479 offsetof(struct ipsec_esp_edesc, hw_desc));
480
481 if (err) {
482 char tmp[CAAM_ERROR_STR_MAX];
483
484 dev_err(jrdev, "%08x: %s\n", err, caam_jr_strstatus(tmp, err));
485 }
486
487 ipsec_esp_unmap(jrdev, edesc, areq);
488
489 /*
490 * verify hw auth check passed else return -EBADMSG
491 */
492 if ((err & JRSTA_CCBERR_ERRID_MASK) == JRSTA_CCBERR_ERRID_ICVCHK)
493 err = -EBADMSG;
494
495#ifdef DEBUG
496 print_hex_dump(KERN_ERR, "iphdrout@"xstr(__LINE__)": ",
497 DUMP_PREFIX_ADDRESS, 16, 4,
498 ((char *)sg_virt(areq->assoc) - sizeof(struct iphdr)),
499 sizeof(struct iphdr) + areq->assoclen +
500 ((areq->cryptlen > 1500) ? 1500 : areq->cryptlen) +
501 ctx->authsize + 36, 1);
502 if (!err && edesc->link_tbl_bytes) {
503 struct scatterlist *sg = sg_last(areq->src, edesc->src_nents);
504 print_hex_dump(KERN_ERR, "sglastout@"xstr(__LINE__)": ",
505 DUMP_PREFIX_ADDRESS, 16, 4, sg_virt(sg),
506 sg->length + ctx->authsize + 16, 1);
507 }
508#endif
509 kfree(edesc);
510
511 aead_request_complete(areq, err);
512}
513
514/*
515 * convert scatterlist to h/w link table format
516 * scatterlist must have been previously dma mapped
517 */
518static void sg_to_link_tbl(struct scatterlist *sg, int sg_count,
519 struct link_tbl_entry *link_tbl_ptr, u32 offset)
520{
521 while (sg_count) {
522 link_tbl_ptr->ptr = sg_dma_address(sg);
523 link_tbl_ptr->len = sg_dma_len(sg);
524 link_tbl_ptr->reserved = 0;
525 link_tbl_ptr->buf_pool_id = 0;
526 link_tbl_ptr->offset = offset;
527 link_tbl_ptr++;
528 sg = sg_next(sg);
529 sg_count--;
530 }
531
532 /* set Final bit (marks end of link table) */
533 link_tbl_ptr--;
534 link_tbl_ptr->len |= 0x40000000;
535}
536
537/*
538 * fill in and submit ipsec_esp job descriptor
539 */
540static int ipsec_esp(struct ipsec_esp_edesc *edesc, struct aead_request *areq,
541 u32 encrypt,
542 void (*callback) (struct device *dev, u32 *desc,
543 u32 err, void *context))
544{
545 struct crypto_aead *aead = crypto_aead_reqtfm(areq);
546 struct caam_ctx *ctx = crypto_aead_ctx(aead);
547 struct device *jrdev = ctx->jrdev;
548 u32 *desc = edesc->hw_desc, options;
549 int ret, sg_count, assoc_sg_count;
550 int ivsize = crypto_aead_ivsize(aead);
551 int authsize = ctx->authsize;
552 dma_addr_t ptr, dst_dma, src_dma;
553#ifdef DEBUG
554 u32 *sh_desc = ctx->sh_desc;
555
556 debug("assoclen %d cryptlen %d authsize %d\n",
557 areq->assoclen, areq->cryptlen, authsize);
558 print_hex_dump(KERN_ERR, "assoc @"xstr(__LINE__)": ",
559 DUMP_PREFIX_ADDRESS, 16, 4, sg_virt(areq->assoc),
560 areq->assoclen , 1);
561 print_hex_dump(KERN_ERR, "presciv@"xstr(__LINE__)": ",
562 DUMP_PREFIX_ADDRESS, 16, 4, sg_virt(areq->src) - ivsize,
563 edesc->src_nents ? 100 : ivsize, 1);
564 print_hex_dump(KERN_ERR, "src @"xstr(__LINE__)": ",
565 DUMP_PREFIX_ADDRESS, 16, 4, sg_virt(areq->src),
566 edesc->src_nents ? 100 : areq->cryptlen + authsize, 1);
567 print_hex_dump(KERN_ERR, "shrdesc@"xstr(__LINE__)": ",
568 DUMP_PREFIX_ADDRESS, 16, 4, sh_desc,
569 desc_bytes(sh_desc), 1);
570#endif
571 assoc_sg_count = dma_map_sg(jrdev, areq->assoc, edesc->assoc_nents ?: 1,
572 DMA_TO_DEVICE);
573 if (areq->src == areq->dst)
574 sg_count = dma_map_sg(jrdev, areq->src, edesc->src_nents ? : 1,
575 DMA_BIDIRECTIONAL);
576 else
577 sg_count = dma_map_sg(jrdev, areq->src, edesc->src_nents ? : 1,
578 DMA_TO_DEVICE);
579
580 /* start auth operation */
581 append_operation(desc, ctx->class2_alg_type | OP_ALG_AS_INITFINAL |
582 (encrypt ? : OP_ALG_ICV_ON));
583
584 /* Load FIFO with data for Class 2 CHA */
585 options = FIFOLD_CLASS_CLASS2 | FIFOLD_TYPE_MSG;
586 if (!edesc->assoc_nents) {
587 ptr = sg_dma_address(areq->assoc);
588 } else {
589 sg_to_link_tbl(areq->assoc, edesc->assoc_nents,
590 edesc->link_tbl, 0);
591 ptr = edesc->link_tbl_dma;
592 options |= LDST_SGF;
593 }
594 append_fifo_load(desc, ptr, areq->assoclen, options);
595
596 /* copy iv from cipher/class1 input context to class2 infifo */
597 append_move(desc, MOVE_SRC_CLASS1CTX | MOVE_DEST_CLASS2INFIFO | ivsize);
598
599 if (!encrypt) {
600 u32 *jump_cmd, *uncond_jump_cmd;
601
602 /* JUMP if shared */
603 jump_cmd = append_jump(desc, JUMP_TEST_ALL | JUMP_COND_SHRD);
604
605 /* start class 1 (cipher) operation, non-shared version */
606 append_operation(desc, ctx->class1_alg_type |
607 OP_ALG_AS_INITFINAL);
608
609 uncond_jump_cmd = append_jump(desc, 0);
610
611 set_jump_tgt_here(desc, jump_cmd);
612
613 /* start class 1 (cipher) operation, shared version */
614 append_operation(desc, ctx->class1_alg_type |
615 OP_ALG_AS_INITFINAL | OP_ALG_AAI_DK);
616 set_jump_tgt_here(desc, uncond_jump_cmd);
617 } else
618 append_operation(desc, ctx->class1_alg_type |
619 OP_ALG_AS_INITFINAL | encrypt);
620
621 /* load payload & instruct to class2 to snoop class 1 if encrypting */
622 options = 0;
623 if (!edesc->src_nents) {
624 src_dma = sg_dma_address(areq->src);
625 } else {
626 sg_to_link_tbl(areq->src, edesc->src_nents, edesc->link_tbl +
627 edesc->assoc_nents, 0);
628 src_dma = edesc->link_tbl_dma + edesc->assoc_nents *
629 sizeof(struct link_tbl_entry);
630 options |= LDST_SGF;
631 }
632 append_seq_in_ptr(desc, src_dma, areq->cryptlen + authsize, options);
633 append_seq_fifo_load(desc, areq->cryptlen, FIFOLD_CLASS_BOTH |
634 FIFOLD_TYPE_LASTBOTH |
635 (encrypt ? FIFOLD_TYPE_MSG1OUT2
636 : FIFOLD_TYPE_MSG));
637
638 /* specify destination */
639 if (areq->src == areq->dst) {
640 dst_dma = src_dma;
641 } else {
642 sg_count = dma_map_sg(jrdev, areq->dst, edesc->dst_nents ? : 1,
643 DMA_FROM_DEVICE);
644 if (!edesc->dst_nents) {
645 dst_dma = sg_dma_address(areq->dst);
646 options = 0;
647 } else {
648 sg_to_link_tbl(areq->dst, edesc->dst_nents,
649 edesc->link_tbl + edesc->assoc_nents +
650 edesc->src_nents, 0);
651 dst_dma = edesc->link_tbl_dma + (edesc->assoc_nents +
652 edesc->src_nents) *
653 sizeof(struct link_tbl_entry);
654 options = LDST_SGF;
655 }
656 }
657 append_seq_out_ptr(desc, dst_dma, areq->cryptlen + authsize, options);
658 append_seq_fifo_store(desc, areq->cryptlen, FIFOST_TYPE_MESSAGE_DATA);
659
660 /* ICV */
661 if (encrypt)
662 append_seq_store(desc, authsize, LDST_CLASS_2_CCB |
663 LDST_SRCDST_BYTE_CONTEXT);
664 else
665 append_seq_fifo_load(desc, authsize, FIFOLD_CLASS_CLASS2 |
666 FIFOLD_TYPE_LAST2 | FIFOLD_TYPE_ICV);
667
668#ifdef DEBUG
669 debug("job_desc_len %d\n", desc_len(desc));
670 print_hex_dump(KERN_ERR, "jobdesc@"xstr(__LINE__)": ",
671 DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc) , 1);
672 print_hex_dump(KERN_ERR, "jdlinkt@"xstr(__LINE__)": ",
673 DUMP_PREFIX_ADDRESS, 16, 4, edesc->link_tbl,
674 edesc->link_tbl_bytes, 1);
675#endif
676
677 ret = caam_jr_enqueue(jrdev, desc, callback, areq);
678 if (!ret)
679 ret = -EINPROGRESS;
680 else {
681 ipsec_esp_unmap(jrdev, edesc, areq);
682 kfree(edesc);
683 }
684
685 return ret;
686}
687
688/*
689 * derive number of elements in scatterlist
690 */
691static int sg_count(struct scatterlist *sg_list, int nbytes, int *chained)
692{
693 struct scatterlist *sg = sg_list;
694 int sg_nents = 0;
695
696 *chained = 0;
697 while (nbytes > 0) {
698 sg_nents++;
699 nbytes -= sg->length;
700 if (!sg_is_last(sg) && (sg + 1)->length == 0)
701 *chained = 1;
702 sg = scatterwalk_sg_next(sg);
703 }
704
705 return sg_nents;
706}
707
708/*
709 * allocate and map the ipsec_esp extended descriptor
710 */
711static struct ipsec_esp_edesc *ipsec_esp_edesc_alloc(struct aead_request *areq,
712 int desc_bytes)
713{
714 struct crypto_aead *aead = crypto_aead_reqtfm(areq);
715 struct caam_ctx *ctx = crypto_aead_ctx(aead);
716 struct device *jrdev = ctx->jrdev;
717 gfp_t flags = areq->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL :
718 GFP_ATOMIC;
719 int assoc_nents, src_nents, dst_nents = 0, chained, link_tbl_bytes;
720 struct ipsec_esp_edesc *edesc;
721
722 assoc_nents = sg_count(areq->assoc, areq->assoclen, &chained);
723 BUG_ON(chained);
724 if (likely(assoc_nents == 1))
725 assoc_nents = 0;
726
727 src_nents = sg_count(areq->src, areq->cryptlen + ctx->authsize,
728 &chained);
729 BUG_ON(chained);
730 if (src_nents == 1)
731 src_nents = 0;
732
733 if (unlikely(areq->dst != areq->src)) {
734 dst_nents = sg_count(areq->dst, areq->cryptlen + ctx->authsize,
735 &chained);
736 BUG_ON(chained);
737 if (dst_nents == 1)
738 dst_nents = 0;
739 }
740
741 link_tbl_bytes = (assoc_nents + src_nents + dst_nents) *
742 sizeof(struct link_tbl_entry);
743 debug("link_tbl_bytes %d\n", link_tbl_bytes);
744
745 /* allocate space for base edesc and hw desc commands, link tables */
746 edesc = kmalloc(sizeof(struct ipsec_esp_edesc) + desc_bytes +
747 link_tbl_bytes, GFP_DMA | flags);
748 if (!edesc) {
749 dev_err(jrdev, "could not allocate extended descriptor\n");
750 return ERR_PTR(-ENOMEM);
751 }
752
753 edesc->assoc_nents = assoc_nents;
754 edesc->src_nents = src_nents;
755 edesc->dst_nents = dst_nents;
756 edesc->link_tbl = (void *)edesc + sizeof(struct ipsec_esp_edesc) +
757 desc_bytes;
758 edesc->link_tbl_dma = dma_map_single(jrdev, edesc->link_tbl,
759 link_tbl_bytes, DMA_TO_DEVICE);
760 edesc->link_tbl_bytes = link_tbl_bytes;
761
762 return edesc;
763}
764
765static int aead_authenc_encrypt(struct aead_request *areq)
766{
767 struct ipsec_esp_edesc *edesc;
768 struct crypto_aead *aead = crypto_aead_reqtfm(areq);
769 struct caam_ctx *ctx = crypto_aead_ctx(aead);
770 struct device *jrdev = ctx->jrdev;
771 int ivsize = crypto_aead_ivsize(aead);
772 u32 *desc;
773 dma_addr_t iv_dma;
774
775 /* allocate extended descriptor */
776 edesc = ipsec_esp_edesc_alloc(areq, DESC_AEAD_ENCRYPT_TEXT_LEN *
777 CAAM_CMD_SZ);
778 if (IS_ERR(edesc))
779 return PTR_ERR(edesc);
780
781 desc = edesc->hw_desc;
782
783 /* insert shared descriptor pointer */
784 init_job_desc_shared(desc, ctx->shared_desc_phys,
785 desc_len(ctx->sh_desc), HDR_SHARE_DEFER);
786
787 iv_dma = dma_map_single(jrdev, areq->iv, ivsize, DMA_TO_DEVICE);
788 /* check dma error */
789
790 append_load(desc, iv_dma, ivsize,
791 LDST_CLASS_1_CCB | LDST_SRCDST_BYTE_CONTEXT);
792
793 return ipsec_esp(edesc, areq, OP_ALG_ENCRYPT, ipsec_esp_encrypt_done);
794}
795
796static int aead_authenc_decrypt(struct aead_request *req)
797{
798 struct crypto_aead *aead = crypto_aead_reqtfm(req);
799 int ivsize = crypto_aead_ivsize(aead);
800 struct caam_ctx *ctx = crypto_aead_ctx(aead);
801 struct device *jrdev = ctx->jrdev;
802 struct ipsec_esp_edesc *edesc;
803 u32 *desc;
804 dma_addr_t iv_dma;
805
806 req->cryptlen -= ctx->authsize;
807
808 /* allocate extended descriptor */
809 edesc = ipsec_esp_edesc_alloc(req, DESC_AEAD_DECRYPT_TEXT_LEN *
810 CAAM_CMD_SZ);
811 if (IS_ERR(edesc))
812 return PTR_ERR(edesc);
813
814 desc = edesc->hw_desc;
815
816 /* insert shared descriptor pointer */
817 init_job_desc_shared(desc, ctx->shared_desc_phys,
818 desc_len(ctx->sh_desc), HDR_SHARE_DEFER);
819
820 iv_dma = dma_map_single(jrdev, req->iv, ivsize, DMA_TO_DEVICE);
821 /* check dma error */
822
823 append_load(desc, iv_dma, ivsize,
824 LDST_CLASS_1_CCB | LDST_SRCDST_BYTE_CONTEXT);
825
826 return ipsec_esp(edesc, req, !OP_ALG_ENCRYPT, ipsec_esp_decrypt_done);
827}
828
829static int aead_authenc_givencrypt(struct aead_givcrypt_request *req)
830{
831 struct aead_request *areq = &req->areq;
832 struct ipsec_esp_edesc *edesc;
833 struct crypto_aead *aead = crypto_aead_reqtfm(areq);
834 struct caam_ctx *ctx = crypto_aead_ctx(aead);
835 struct device *jrdev = ctx->jrdev;
836 int ivsize = crypto_aead_ivsize(aead);
837 dma_addr_t iv_dma;
838 u32 *desc;
839
840 iv_dma = dma_map_single(jrdev, req->giv, ivsize, DMA_FROM_DEVICE);
841
842 debug("%s: giv %p\n", __func__, req->giv);
843
844 /* allocate extended descriptor */
845 edesc = ipsec_esp_edesc_alloc(areq, DESC_AEAD_GIVENCRYPT_TEXT_LEN *
846 CAAM_CMD_SZ);
847 if (IS_ERR(edesc))
848 return PTR_ERR(edesc);
849
850 desc = edesc->hw_desc;
851
852 /* insert shared descriptor pointer */
853 init_job_desc_shared(desc, ctx->shared_desc_phys,
854 desc_len(ctx->sh_desc), HDR_SHARE_DEFER);
855
856 /*
857 * LOAD IMM Info FIFO
858 * to DECO, Last, Padding, Random, Message, 16 bytes
859 */
860 append_load_imm_u32(desc, NFIFOENTRY_DEST_DECO | NFIFOENTRY_LC1 |
861 NFIFOENTRY_STYPE_PAD | NFIFOENTRY_DTYPE_MSG |
862 NFIFOENTRY_PTYPE_RND | ivsize,
863 LDST_SRCDST_WORD_INFO_FIFO);
864
865 /*
866 * disable info fifo entries since the above serves as the entry
867 * this way, the MOVE command won't generate an entry.
868 * Note that this isn't required in more recent versions of
869 * SEC as a MOVE that doesn't do info FIFO entries is available.
870 */
871 append_cmd(desc, CMD_LOAD | DISABLE_AUTO_INFO_FIFO);
872
873 /* MOVE DECO Alignment -> C1 Context 16 bytes */
874 append_move(desc, MOVE_SRC_INFIFO | MOVE_DEST_CLASS1CTX | ivsize);
875
876 /* re-enable info fifo entries */
877 append_cmd(desc, CMD_LOAD | ENABLE_AUTO_INFO_FIFO);
878
879 /* MOVE C1 Context -> OFIFO 16 bytes */
880 append_move(desc, MOVE_SRC_CLASS1CTX | MOVE_DEST_OUTFIFO | ivsize);
881
882 append_fifo_store(desc, iv_dma, ivsize, FIFOST_TYPE_MESSAGE_DATA);
883
884 return ipsec_esp(edesc, areq, OP_ALG_ENCRYPT, ipsec_esp_encrypt_done);
885}
886
887struct caam_alg_template {
888 char name[CRYPTO_MAX_ALG_NAME];
889 char driver_name[CRYPTO_MAX_ALG_NAME];
890 unsigned int blocksize;
891 struct aead_alg aead;
892 u32 class1_alg_type;
893 u32 class2_alg_type;
894 u32 alg_op;
895};
896
897static struct caam_alg_template driver_algs[] = {
898 /* single-pass ipsec_esp descriptor */
899 {
900 .name = "authenc(hmac(sha1),cbc(aes))",
901 .driver_name = "authenc-hmac-sha1-cbc-aes-caam",
902 .blocksize = AES_BLOCK_SIZE,
903 .aead = {
904 .setkey = aead_authenc_setkey,
905 .setauthsize = aead_authenc_setauthsize,
906 .encrypt = aead_authenc_encrypt,
907 .decrypt = aead_authenc_decrypt,
908 .givencrypt = aead_authenc_givencrypt,
909 .geniv = "<built-in>",
910 .ivsize = AES_BLOCK_SIZE,
911 .maxauthsize = SHA1_DIGEST_SIZE,
912 },
913 .class1_alg_type = OP_ALG_ALGSEL_AES | OP_ALG_AAI_CBC,
914 .class2_alg_type = OP_ALG_ALGSEL_SHA1 | OP_ALG_AAI_HMAC_PRECOMP,
915 .alg_op = OP_ALG_ALGSEL_SHA1 | OP_ALG_AAI_HMAC,
916 },
917 {
918 .name = "authenc(hmac(sha256),cbc(aes))",
919 .driver_name = "authenc-hmac-sha256-cbc-aes-caam",
920 .blocksize = AES_BLOCK_SIZE,
921 .aead = {
922 .setkey = aead_authenc_setkey,
923 .setauthsize = aead_authenc_setauthsize,
924 .encrypt = aead_authenc_encrypt,
925 .decrypt = aead_authenc_decrypt,
926 .givencrypt = aead_authenc_givencrypt,
927 .geniv = "<built-in>",
928 .ivsize = AES_BLOCK_SIZE,
929 .maxauthsize = SHA256_DIGEST_SIZE,
930 },
931 .class1_alg_type = OP_ALG_ALGSEL_AES | OP_ALG_AAI_CBC,
932 .class2_alg_type = OP_ALG_ALGSEL_SHA256 |
933 OP_ALG_AAI_HMAC_PRECOMP,
934 .alg_op = OP_ALG_ALGSEL_SHA256 | OP_ALG_AAI_HMAC,
935 },
936 {
937 .name = "authenc(hmac(sha512),cbc(aes))",
938 .driver_name = "authenc-hmac-sha512-cbc-aes-caam",
939 .blocksize = AES_BLOCK_SIZE,
940 .aead = {
941 .setkey = aead_authenc_setkey,
942 .setauthsize = aead_authenc_setauthsize,
943 .encrypt = aead_authenc_encrypt,
944 .decrypt = aead_authenc_decrypt,
945 .givencrypt = aead_authenc_givencrypt,
946 .geniv = "<built-in>",
947 .ivsize = AES_BLOCK_SIZE,
948 .maxauthsize = SHA512_DIGEST_SIZE,
949 },
950 .class1_alg_type = OP_ALG_ALGSEL_AES | OP_ALG_AAI_CBC,
951 .class2_alg_type = OP_ALG_ALGSEL_SHA512 |
952 OP_ALG_AAI_HMAC_PRECOMP,
953 .alg_op = OP_ALG_ALGSEL_SHA512 | OP_ALG_AAI_HMAC,
954 },
955 {
956 .name = "authenc(hmac(sha1),cbc(des3_ede))",
957 .driver_name = "authenc-hmac-sha1-cbc-des3_ede-caam",
958 .blocksize = DES3_EDE_BLOCK_SIZE,
959 .aead = {
960 .setkey = aead_authenc_setkey,
961 .setauthsize = aead_authenc_setauthsize,
962 .encrypt = aead_authenc_encrypt,
963 .decrypt = aead_authenc_decrypt,
964 .givencrypt = aead_authenc_givencrypt,
965 .geniv = "<built-in>",
966 .ivsize = DES3_EDE_BLOCK_SIZE,
967 .maxauthsize = SHA1_DIGEST_SIZE,
968 },
969 .class1_alg_type = OP_ALG_ALGSEL_3DES | OP_ALG_AAI_CBC,
970 .class2_alg_type = OP_ALG_ALGSEL_SHA1 | OP_ALG_AAI_HMAC_PRECOMP,
971 .alg_op = OP_ALG_ALGSEL_SHA1 | OP_ALG_AAI_HMAC,
972 },
973 {
974 .name = "authenc(hmac(sha256),cbc(des3_ede))",
975 .driver_name = "authenc-hmac-sha256-cbc-des3_ede-caam",
976 .blocksize = DES3_EDE_BLOCK_SIZE,
977 .aead = {
978 .setkey = aead_authenc_setkey,
979 .setauthsize = aead_authenc_setauthsize,
980 .encrypt = aead_authenc_encrypt,
981 .decrypt = aead_authenc_decrypt,
982 .givencrypt = aead_authenc_givencrypt,
983 .geniv = "<built-in>",
984 .ivsize = DES3_EDE_BLOCK_SIZE,
985 .maxauthsize = SHA256_DIGEST_SIZE,
986 },
987 .class1_alg_type = OP_ALG_ALGSEL_3DES | OP_ALG_AAI_CBC,
988 .class2_alg_type = OP_ALG_ALGSEL_SHA256 |
989 OP_ALG_AAI_HMAC_PRECOMP,
990 .alg_op = OP_ALG_ALGSEL_SHA256 | OP_ALG_AAI_HMAC,
991 },
992 {
993 .name = "authenc(hmac(sha512),cbc(des3_ede))",
994 .driver_name = "authenc-hmac-sha512-cbc-des3_ede-caam",
995 .blocksize = DES3_EDE_BLOCK_SIZE,
996 .aead = {
997 .setkey = aead_authenc_setkey,
998 .setauthsize = aead_authenc_setauthsize,
999 .encrypt = aead_authenc_encrypt,
1000 .decrypt = aead_authenc_decrypt,
1001 .givencrypt = aead_authenc_givencrypt,
1002 .geniv = "<built-in>",
1003 .ivsize = DES3_EDE_BLOCK_SIZE,
1004 .maxauthsize = SHA512_DIGEST_SIZE,
1005 },
1006 .class1_alg_type = OP_ALG_ALGSEL_3DES | OP_ALG_AAI_CBC,
1007 .class2_alg_type = OP_ALG_ALGSEL_SHA512 |
1008 OP_ALG_AAI_HMAC_PRECOMP,
1009 .alg_op = OP_ALG_ALGSEL_SHA512 | OP_ALG_AAI_HMAC,
1010 },
1011 {
1012 .name = "authenc(hmac(sha1),cbc(des))",
1013 .driver_name = "authenc-hmac-sha1-cbc-des-caam",
1014 .blocksize = DES_BLOCK_SIZE,
1015 .aead = {
1016 .setkey = aead_authenc_setkey,
1017 .setauthsize = aead_authenc_setauthsize,
1018 .encrypt = aead_authenc_encrypt,
1019 .decrypt = aead_authenc_decrypt,
1020 .givencrypt = aead_authenc_givencrypt,
1021 .geniv = "<built-in>",
1022 .ivsize = DES_BLOCK_SIZE,
1023 .maxauthsize = SHA1_DIGEST_SIZE,
1024 },
1025 .class1_alg_type = OP_ALG_ALGSEL_DES | OP_ALG_AAI_CBC,
1026 .class2_alg_type = OP_ALG_ALGSEL_SHA1 | OP_ALG_AAI_HMAC_PRECOMP,
1027 .alg_op = OP_ALG_ALGSEL_SHA1 | OP_ALG_AAI_HMAC,
1028 },
1029 {
1030 .name = "authenc(hmac(sha256),cbc(des))",
1031 .driver_name = "authenc-hmac-sha256-cbc-des-caam",
1032 .blocksize = DES_BLOCK_SIZE,
1033 .aead = {
1034 .setkey = aead_authenc_setkey,
1035 .setauthsize = aead_authenc_setauthsize,
1036 .encrypt = aead_authenc_encrypt,
1037 .decrypt = aead_authenc_decrypt,
1038 .givencrypt = aead_authenc_givencrypt,
1039 .geniv = "<built-in>",
1040 .ivsize = DES_BLOCK_SIZE,
1041 .maxauthsize = SHA256_DIGEST_SIZE,
1042 },
1043 .class1_alg_type = OP_ALG_ALGSEL_DES | OP_ALG_AAI_CBC,
1044 .class2_alg_type = OP_ALG_ALGSEL_SHA256 |
1045 OP_ALG_AAI_HMAC_PRECOMP,
1046 .alg_op = OP_ALG_ALGSEL_SHA256 | OP_ALG_AAI_HMAC,
1047 },
1048 {
1049 .name = "authenc(hmac(sha512),cbc(des))",
1050 .driver_name = "authenc-hmac-sha512-cbc-des-caam",
1051 .blocksize = DES_BLOCK_SIZE,
1052 .aead = {
1053 .setkey = aead_authenc_setkey,
1054 .setauthsize = aead_authenc_setauthsize,
1055 .encrypt = aead_authenc_encrypt,
1056 .decrypt = aead_authenc_decrypt,
1057 .givencrypt = aead_authenc_givencrypt,
1058 .geniv = "<built-in>",
1059 .ivsize = DES_BLOCK_SIZE,
1060 .maxauthsize = SHA512_DIGEST_SIZE,
1061 },
1062 .class1_alg_type = OP_ALG_ALGSEL_DES | OP_ALG_AAI_CBC,
1063 .class2_alg_type = OP_ALG_ALGSEL_SHA512 |
1064 OP_ALG_AAI_HMAC_PRECOMP,
1065 .alg_op = OP_ALG_ALGSEL_SHA512 | OP_ALG_AAI_HMAC,
1066 },
1067};
1068
1069struct caam_crypto_alg {
1070 struct list_head entry;
1071 struct device *ctrldev;
1072 int class1_alg_type;
1073 int class2_alg_type;
1074 int alg_op;
1075 struct crypto_alg crypto_alg;
1076};
1077
1078static int caam_cra_init(struct crypto_tfm *tfm)
1079{
1080 struct crypto_alg *alg = tfm->__crt_alg;
1081 struct caam_crypto_alg *caam_alg =
1082 container_of(alg, struct caam_crypto_alg, crypto_alg);
1083 struct caam_ctx *ctx = crypto_tfm_ctx(tfm);
1084 struct caam_drv_private *priv = dev_get_drvdata(caam_alg->ctrldev);
1085 int tgt_jr = atomic_inc_return(&priv->tfm_count);
1086
1087 /*
1088 * distribute tfms across job rings to ensure in-order
1089 * crypto request processing per tfm
1090 */
1091 ctx->jrdev = priv->algapi_jr[(tgt_jr / 2) % priv->num_jrs_for_algapi];
1092
1093 /* copy descriptor header template value */
1094 ctx->class1_alg_type = OP_TYPE_CLASS1_ALG | caam_alg->class1_alg_type;
1095 ctx->class2_alg_type = OP_TYPE_CLASS2_ALG | caam_alg->class2_alg_type;
1096 ctx->alg_op = OP_TYPE_CLASS2_ALG | caam_alg->alg_op;
1097
1098 return 0;
1099}
1100
1101static void caam_cra_exit(struct crypto_tfm *tfm)
1102{
1103 struct caam_ctx *ctx = crypto_tfm_ctx(tfm);
1104
1105 if (!dma_mapping_error(ctx->jrdev, ctx->shared_desc_phys))
1106 dma_unmap_single(ctx->jrdev, ctx->shared_desc_phys,
1107 desc_bytes(ctx->sh_desc), DMA_TO_DEVICE);
1108 kfree(ctx->sh_desc);
1109
1110 if (!dma_mapping_error(ctx->jrdev, ctx->key_phys))
1111 dma_unmap_single(ctx->jrdev, ctx->key_phys,
1112 ctx->split_key_pad_len + ctx->enckeylen,
1113 DMA_TO_DEVICE);
1114 kfree(ctx->key);
1115}
1116
1117static void __exit caam_algapi_exit(void)
1118{
1119
1120 struct device_node *dev_node;
1121 struct platform_device *pdev;
1122 struct device *ctrldev;
1123 struct caam_drv_private *priv;
1124 struct caam_crypto_alg *t_alg, *n;
1125 int i, err;
1126
1127 dev_node = of_find_compatible_node(NULL, NULL, "fsl,sec-v4.0");
1128 if (!dev_node)
1129 return;
1130
1131 pdev = of_find_device_by_node(dev_node);
1132 if (!pdev)
1133 return;
1134
1135 ctrldev = &pdev->dev;
1136 of_node_put(dev_node);
1137 priv = dev_get_drvdata(ctrldev);
1138
1139 if (!priv->alg_list.next)
1140 return;
1141
1142 list_for_each_entry_safe(t_alg, n, &priv->alg_list, entry) {
1143 crypto_unregister_alg(&t_alg->crypto_alg);
1144 list_del(&t_alg->entry);
1145 kfree(t_alg);
1146 }
1147
1148 for (i = 0; i < priv->total_jobrs; i++) {
1149 err = caam_jr_deregister(priv->algapi_jr[i]);
1150 if (err < 0)
1151 break;
1152 }
1153 kfree(priv->algapi_jr);
1154}
1155
1156static struct caam_crypto_alg *caam_alg_alloc(struct device *ctrldev,
1157 struct caam_alg_template
1158 *template)
1159{
1160 struct caam_crypto_alg *t_alg;
1161 struct crypto_alg *alg;
1162
1163 t_alg = kzalloc(sizeof(struct caam_crypto_alg), GFP_KERNEL);
1164 if (!t_alg) {
1165 dev_err(ctrldev, "failed to allocate t_alg\n");
1166 return ERR_PTR(-ENOMEM);
1167 }
1168
1169 alg = &t_alg->crypto_alg;
1170
1171 snprintf(alg->cra_name, CRYPTO_MAX_ALG_NAME, "%s", template->name);
1172 snprintf(alg->cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s",
1173 template->driver_name);
1174 alg->cra_module = THIS_MODULE;
1175 alg->cra_init = caam_cra_init;
1176 alg->cra_exit = caam_cra_exit;
1177 alg->cra_priority = CAAM_CRA_PRIORITY;
1178 alg->cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC;
1179 alg->cra_blocksize = template->blocksize;
1180 alg->cra_alignmask = 0;
1181 alg->cra_type = &crypto_aead_type;
1182 alg->cra_ctxsize = sizeof(struct caam_ctx);
1183 alg->cra_u.aead = template->aead;
1184
1185 t_alg->class1_alg_type = template->class1_alg_type;
1186 t_alg->class2_alg_type = template->class2_alg_type;
1187 t_alg->alg_op = template->alg_op;
1188 t_alg->ctrldev = ctrldev;
1189
1190 return t_alg;
1191}
1192
1193static int __init caam_algapi_init(void)
1194{
1195 struct device_node *dev_node;
1196 struct platform_device *pdev;
1197 struct device *ctrldev, **jrdev;
1198 struct caam_drv_private *priv;
1199 int i = 0, err = 0;
1200
1201 dev_node = of_find_compatible_node(NULL, NULL, "fsl,sec-v4.0");
1202 if (!dev_node)
1203 return -ENODEV;
1204
1205 pdev = of_find_device_by_node(dev_node);
1206 if (!pdev)
1207 return -ENODEV;
1208
1209 ctrldev = &pdev->dev;
1210 priv = dev_get_drvdata(ctrldev);
1211 of_node_put(dev_node);
1212
1213 INIT_LIST_HEAD(&priv->alg_list);
1214
1215 jrdev = kmalloc(sizeof(*jrdev) * priv->total_jobrs, GFP_KERNEL);
1216 if (!jrdev)
1217 return -ENOMEM;
1218
1219 for (i = 0; i < priv->total_jobrs; i++) {
1220 err = caam_jr_register(ctrldev, &jrdev[i]);
1221 if (err < 0)
1222 break;
1223 }
1224 if (err < 0 && i == 0) {
1225 dev_err(ctrldev, "algapi error in job ring registration: %d\n",
1226 err);
1227 kfree(jrdev);
1228 return err;
1229 }
1230
1231 priv->num_jrs_for_algapi = i;
1232 priv->algapi_jr = jrdev;
1233 atomic_set(&priv->tfm_count, -1);
1234
1235 /* register crypto algorithms the device supports */
1236 for (i = 0; i < ARRAY_SIZE(driver_algs); i++) {
1237 /* TODO: check if h/w supports alg */
1238 struct caam_crypto_alg *t_alg;
1239
1240 t_alg = caam_alg_alloc(ctrldev, &driver_algs[i]);
1241 if (IS_ERR(t_alg)) {
1242 err = PTR_ERR(t_alg);
1243 dev_warn(ctrldev, "%s alg allocation failed\n",
1244 driver_algs[i].driver_name);
1245 continue;
1246 }
1247
1248 err = crypto_register_alg(&t_alg->crypto_alg);
1249 if (err) {
1250 dev_warn(ctrldev, "%s alg registration failed\n",
1251 t_alg->crypto_alg.cra_driver_name);
1252 kfree(t_alg);
1253 } else {
1254 list_add_tail(&t_alg->entry, &priv->alg_list);
1255 dev_info(ctrldev, "%s\n",
1256 t_alg->crypto_alg.cra_driver_name);
1257 }
1258 }
1259
1260 return err;
1261}
1262
1263module_init(caam_algapi_init);
1264module_exit(caam_algapi_exit);
1265
1266MODULE_LICENSE("GPL");
1267MODULE_DESCRIPTION("FSL CAAM support for crypto API");
1268MODULE_AUTHOR("Freescale Semiconductor - NMG/STC");
generated by cgit v1.2.2 (git 2.25.0) at 2025-02-22 22:26:50 -0500