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authorYuan Kang <Yuan.Kang@freescale.com>2012-06-22 20:48:45 -0400
committerHerbert Xu <herbert@gondor.apana.org.au>2012-06-27 02:42:05 -0400
commit4c1ec1f9301549db229bc6dce916f8a99d1f82d6 (patch)
treec97f112c51b6c4aea2cb52c2fe9e4b899cb86fec /drivers/crypto/caam
parent8009a383f28e853df1a1b08d405ccf67ba860fcc (diff)
crypto: caam - refactor key_gen, sg
create separate files for split key generation and scatterlist functions. Signed-off-by: Yuan Kang <Yuan.Kang@freescale.com> Signed-off-by: Kim Phillips <kim.phillips@freescale.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/caam')
-rw-r--r--drivers/crypto/caam/Makefile2
-rw-r--r--drivers/crypto/caam/caamalg.c197
-rw-r--r--drivers/crypto/caam/desc.h10
-rw-r--r--drivers/crypto/caam/key_gen.c122
-rw-r--r--drivers/crypto/caam/key_gen.h17
-rw-r--r--drivers/crypto/caam/sg_link_tbl.h84
6 files changed, 242 insertions, 190 deletions
diff --git a/drivers/crypto/caam/Makefile b/drivers/crypto/caam/Makefile
index ef39011b4505..4447e5748c43 100644
--- a/drivers/crypto/caam/Makefile
+++ b/drivers/crypto/caam/Makefile
@@ -5,4 +5,4 @@
5obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM) += caam.o 5obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM) += caam.o
6obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_CRYPTO_API) += caamalg.o 6obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_CRYPTO_API) += caamalg.o
7 7
8caam-objs := ctrl.o jr.o error.o 8caam-objs := ctrl.o jr.o error.o key_gen.o
diff --git a/drivers/crypto/caam/caamalg.c b/drivers/crypto/caam/caamalg.c
index a4e266f928c2..ea0295d137a7 100644
--- a/drivers/crypto/caam/caamalg.c
+++ b/drivers/crypto/caam/caamalg.c
@@ -51,6 +51,8 @@
51#include "desc_constr.h" 51#include "desc_constr.h"
52#include "jr.h" 52#include "jr.h"
53#include "error.h" 53#include "error.h"
54#include "sg_link_tbl.h"
55#include "key_gen.h"
54 56
55/* 57/*
56 * crypto alg 58 * crypto alg
@@ -453,121 +455,12 @@ static int aead_setauthsize(struct crypto_aead *authenc,
453 return 0; 455 return 0;
454} 456}
455 457
456struct split_key_result { 458static u32 gen_split_aead_key(struct caam_ctx *ctx, const u8 *key_in,
457 struct completion completion; 459 u32 authkeylen)
458 int err;
459};
460
461static void split_key_done(struct device *dev, u32 *desc, u32 err,
462 void *context)
463{ 460{
464 struct split_key_result *res = context; 461 return gen_split_key(ctx->jrdev, ctx->key, ctx->split_key_len,
465 462 ctx->split_key_pad_len, key_in, authkeylen,
466#ifdef DEBUG 463 ctx->alg_op);
467 dev_err(dev, "%s %d: err 0x%x\n", __func__, __LINE__, err);
468#endif
469
470 if (err) {
471 char tmp[CAAM_ERROR_STR_MAX];
472
473 dev_err(dev, "%08x: %s\n", err, caam_jr_strstatus(tmp, err));
474 }
475
476 res->err = err;
477
478 complete(&res->completion);
479}
480
481/*
482get a split ipad/opad key
483
484Split key generation-----------------------------------------------
485
486[00] 0xb0810008 jobdesc: stidx=1 share=never len=8
487[01] 0x04000014 key: class2->keyreg len=20
488 @0xffe01000
489[03] 0x84410014 operation: cls2-op sha1 hmac init dec
490[04] 0x24940000 fifold: class2 msgdata-last2 len=0 imm
491[05] 0xa4000001 jump: class2 local all ->1 [06]
492[06] 0x64260028 fifostr: class2 mdsplit-jdk len=40
493 @0xffe04000
494*/
495static u32 gen_split_key(struct caam_ctx *ctx, const u8 *key_in, u32 authkeylen)
496{
497 struct device *jrdev = ctx->jrdev;
498 u32 *desc;
499 struct split_key_result result;
500 dma_addr_t dma_addr_in, dma_addr_out;
501 int ret = 0;
502
503 desc = kmalloc(CAAM_CMD_SZ * 6 + CAAM_PTR_SZ * 2, GFP_KERNEL | GFP_DMA);
504
505 init_job_desc(desc, 0);
506
507 dma_addr_in = dma_map_single(jrdev, (void *)key_in, authkeylen,
508 DMA_TO_DEVICE);
509 if (dma_mapping_error(jrdev, dma_addr_in)) {
510 dev_err(jrdev, "unable to map key input memory\n");
511 kfree(desc);
512 return -ENOMEM;
513 }
514 append_key(desc, dma_addr_in, authkeylen, CLASS_2 |
515 KEY_DEST_CLASS_REG);
516
517 /* Sets MDHA up into an HMAC-INIT */
518 append_operation(desc, ctx->alg_op | OP_ALG_DECRYPT |
519 OP_ALG_AS_INIT);
520
521 /*
522 * do a FIFO_LOAD of zero, this will trigger the internal key expansion
523 into both pads inside MDHA
524 */
525 append_fifo_load_as_imm(desc, NULL, 0, LDST_CLASS_2_CCB |
526 FIFOLD_TYPE_MSG | FIFOLD_TYPE_LAST2);
527
528 /*
529 * FIFO_STORE with the explicit split-key content store
530 * (0x26 output type)
531 */
532 dma_addr_out = dma_map_single(jrdev, ctx->key, ctx->split_key_pad_len,
533 DMA_FROM_DEVICE);
534 if (dma_mapping_error(jrdev, dma_addr_out)) {
535 dev_err(jrdev, "unable to map key output memory\n");
536 kfree(desc);
537 return -ENOMEM;
538 }
539 append_fifo_store(desc, dma_addr_out, ctx->split_key_len,
540 LDST_CLASS_2_CCB | FIFOST_TYPE_SPLIT_KEK);
541
542#ifdef DEBUG
543 print_hex_dump(KERN_ERR, "ctx.key@"xstr(__LINE__)": ",
544 DUMP_PREFIX_ADDRESS, 16, 4, key_in, authkeylen, 1);
545 print_hex_dump(KERN_ERR, "jobdesc@"xstr(__LINE__)": ",
546 DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
547#endif
548
549 result.err = 0;
550 init_completion(&result.completion);
551
552 ret = caam_jr_enqueue(jrdev, desc, split_key_done, &result);
553 if (!ret) {
554 /* in progress */
555 wait_for_completion_interruptible(&result.completion);
556 ret = result.err;
557#ifdef DEBUG
558 print_hex_dump(KERN_ERR, "ctx.key@"xstr(__LINE__)": ",
559 DUMP_PREFIX_ADDRESS, 16, 4, ctx->key,
560 ctx->split_key_pad_len, 1);
561#endif
562 }
563
564 dma_unmap_single(jrdev, dma_addr_out, ctx->split_key_pad_len,
565 DMA_FROM_DEVICE);
566 dma_unmap_single(jrdev, dma_addr_in, authkeylen, DMA_TO_DEVICE);
567
568 kfree(desc);
569
570 return ret;
571} 464}
572 465
573static int aead_setkey(struct crypto_aead *aead, 466static int aead_setkey(struct crypto_aead *aead,
@@ -611,7 +504,7 @@ static int aead_setkey(struct crypto_aead *aead,
611 DUMP_PREFIX_ADDRESS, 16, 4, key, keylen, 1); 504 DUMP_PREFIX_ADDRESS, 16, 4, key, keylen, 1);
612#endif 505#endif
613 506
614 ret = gen_split_key(ctx, key, authkeylen); 507 ret = gen_split_aead_key(ctx, key, authkeylen);
615 if (ret) { 508 if (ret) {
616 goto badkey; 509 goto badkey;
617 } 510 }
@@ -758,14 +651,6 @@ static int ablkcipher_setkey(struct crypto_ablkcipher *ablkcipher,
758 return ret; 651 return ret;
759} 652}
760 653
761struct link_tbl_entry {
762 u64 ptr;
763 u32 len;
764 u8 reserved;
765 u8 buf_pool_id;
766 u16 offset;
767};
768
769/* 654/*
770 * aead_edesc - s/w-extended aead descriptor 655 * aead_edesc - s/w-extended aead descriptor
771 * @assoc_nents: number of segments in associated data (SPI+Seq) scatterlist 656 * @assoc_nents: number of segments in associated data (SPI+Seq) scatterlist
@@ -1027,50 +912,6 @@ static void ablkcipher_decrypt_done(struct device *jrdev, u32 *desc, u32 err,
1027 ablkcipher_request_complete(req, err); 912 ablkcipher_request_complete(req, err);
1028} 913}
1029 914
1030static void sg_to_link_tbl_one(struct link_tbl_entry *link_tbl_ptr,
1031 dma_addr_t dma, u32 len, u32 offset)
1032{
1033 link_tbl_ptr->ptr = dma;
1034 link_tbl_ptr->len = len;
1035 link_tbl_ptr->reserved = 0;
1036 link_tbl_ptr->buf_pool_id = 0;
1037 link_tbl_ptr->offset = offset;
1038#ifdef DEBUG
1039 print_hex_dump(KERN_ERR, "link_tbl_ptr@"xstr(__LINE__)": ",
1040 DUMP_PREFIX_ADDRESS, 16, 4, link_tbl_ptr,
1041 sizeof(struct link_tbl_entry), 1);
1042#endif
1043}
1044
1045/*
1046 * convert scatterlist to h/w link table format
1047 * but does not have final bit; instead, returns last entry
1048 */
1049static struct link_tbl_entry *sg_to_link_tbl(struct scatterlist *sg,
1050 int sg_count, struct link_tbl_entry
1051 *link_tbl_ptr, u32 offset)
1052{
1053 while (sg_count) {
1054 sg_to_link_tbl_one(link_tbl_ptr, sg_dma_address(sg),
1055 sg_dma_len(sg), offset);
1056 link_tbl_ptr++;
1057 sg = sg_next(sg);
1058 sg_count--;
1059 }
1060 return link_tbl_ptr - 1;
1061}
1062
1063/*
1064 * convert scatterlist to h/w link table format
1065 * scatterlist must have been previously dma mapped
1066 */
1067static void sg_to_link_tbl_last(struct scatterlist *sg, int sg_count,
1068 struct link_tbl_entry *link_tbl_ptr, u32 offset)
1069{
1070 link_tbl_ptr = sg_to_link_tbl(sg, sg_count, link_tbl_ptr, offset);
1071 link_tbl_ptr->len |= 0x40000000;
1072}
1073
1074/* 915/*
1075 * Fill in aead job descriptor 916 * Fill in aead job descriptor
1076 */ 917 */
@@ -1272,28 +1113,6 @@ static void init_ablkcipher_job(u32 *sh_desc, dma_addr_t ptr,
1272} 1113}
1273 1114
1274/* 1115/*
1275 * derive number of elements in scatterlist
1276 */
1277static int sg_count(struct scatterlist *sg_list, int nbytes)
1278{
1279 struct scatterlist *sg = sg_list;
1280 int sg_nents = 0;
1281
1282 while (nbytes > 0) {
1283 sg_nents++;
1284 nbytes -= sg->length;
1285 if (!sg_is_last(sg) && (sg + 1)->length == 0)
1286 BUG(); /* Not support chaining */
1287 sg = scatterwalk_sg_next(sg);
1288 }
1289
1290 if (likely(sg_nents == 1))
1291 return 0;
1292
1293 return sg_nents;
1294}
1295
1296/*
1297 * allocate and map the aead extended descriptor 1116 * allocate and map the aead extended descriptor
1298 */ 1117 */
1299static struct aead_edesc *aead_edesc_alloc(struct aead_request *req, 1118static struct aead_edesc *aead_edesc_alloc(struct aead_request *req,
diff --git a/drivers/crypto/caam/desc.h b/drivers/crypto/caam/desc.h
index af25e76c5f7c..48c1927dbf21 100644
--- a/drivers/crypto/caam/desc.h
+++ b/drivers/crypto/caam/desc.h
@@ -8,6 +8,16 @@
8#ifndef DESC_H 8#ifndef DESC_H
9#define DESC_H 9#define DESC_H
10 10
11struct link_tbl_entry {
12 u64 ptr;
13#define LINK_TBL_LEN_FIN 0x40000000
14#define LINK_TBL_LEN_EXT 0x80000000
15 u32 len;
16 u8 reserved;
17 u8 buf_pool_id;
18 u16 offset;
19};
20
11/* Max size of any CAAM descriptor in 32-bit words, inclusive of header */ 21/* Max size of any CAAM descriptor in 32-bit words, inclusive of header */
12#define MAX_CAAM_DESCSIZE 64 22#define MAX_CAAM_DESCSIZE 64
13 23
diff --git a/drivers/crypto/caam/key_gen.c b/drivers/crypto/caam/key_gen.c
new file mode 100644
index 000000000000..002888185f17
--- /dev/null
+++ b/drivers/crypto/caam/key_gen.c
@@ -0,0 +1,122 @@
1/*
2 * CAAM/SEC 4.x functions for handling key-generation jobs
3 *
4 * Copyright 2008-2011 Freescale Semiconductor, Inc.
5 *
6 */
7#include "compat.h"
8#include "jr.h"
9#include "error.h"
10#include "desc_constr.h"
11#include "key_gen.h"
12
13void split_key_done(struct device *dev, u32 *desc, u32 err,
14 void *context)
15{
16 struct split_key_result *res = context;
17
18#ifdef DEBUG
19 dev_err(dev, "%s %d: err 0x%x\n", __func__, __LINE__, err);
20#endif
21
22 if (err) {
23 char tmp[CAAM_ERROR_STR_MAX];
24
25 dev_err(dev, "%08x: %s\n", err, caam_jr_strstatus(tmp, err));
26 }
27
28 res->err = err;
29
30 complete(&res->completion);
31}
32EXPORT_SYMBOL(split_key_done);
33/*
34get a split ipad/opad key
35
36Split key generation-----------------------------------------------
37
38[00] 0xb0810008 jobdesc: stidx=1 share=never len=8
39[01] 0x04000014 key: class2->keyreg len=20
40 @0xffe01000
41[03] 0x84410014 operation: cls2-op sha1 hmac init dec
42[04] 0x24940000 fifold: class2 msgdata-last2 len=0 imm
43[05] 0xa4000001 jump: class2 local all ->1 [06]
44[06] 0x64260028 fifostr: class2 mdsplit-jdk len=40
45 @0xffe04000
46*/
47u32 gen_split_key(struct device *jrdev, u8 *key_out, int split_key_len,
48 int split_key_pad_len, const u8 *key_in, u32 keylen,
49 u32 alg_op)
50{
51 u32 *desc;
52 struct split_key_result result;
53 dma_addr_t dma_addr_in, dma_addr_out;
54 int ret = 0;
55
56 desc = kmalloc(CAAM_CMD_SZ * 6 + CAAM_PTR_SZ * 2, GFP_KERNEL | GFP_DMA);
57
58 init_job_desc(desc, 0);
59
60 dma_addr_in = dma_map_single(jrdev, (void *)key_in, keylen,
61 DMA_TO_DEVICE);
62 if (dma_mapping_error(jrdev, dma_addr_in)) {
63 dev_err(jrdev, "unable to map key input memory\n");
64 kfree(desc);
65 return -ENOMEM;
66 }
67 append_key(desc, dma_addr_in, keylen, CLASS_2 | KEY_DEST_CLASS_REG);
68
69 /* Sets MDHA up into an HMAC-INIT */
70 append_operation(desc, alg_op | OP_ALG_DECRYPT | OP_ALG_AS_INIT);
71
72 /*
73 * do a FIFO_LOAD of zero, this will trigger the internal key expansion
74 * into both pads inside MDHA
75 */
76 append_fifo_load_as_imm(desc, NULL, 0, LDST_CLASS_2_CCB |
77 FIFOLD_TYPE_MSG | FIFOLD_TYPE_LAST2);
78
79 /*
80 * FIFO_STORE with the explicit split-key content store
81 * (0x26 output type)
82 */
83 dma_addr_out = dma_map_single(jrdev, key_out, split_key_pad_len,
84 DMA_FROM_DEVICE);
85 if (dma_mapping_error(jrdev, dma_addr_out)) {
86 dev_err(jrdev, "unable to map key output memory\n");
87 kfree(desc);
88 return -ENOMEM;
89 }
90 append_fifo_store(desc, dma_addr_out, split_key_len,
91 LDST_CLASS_2_CCB | FIFOST_TYPE_SPLIT_KEK);
92
93#ifdef DEBUG
94 print_hex_dump(KERN_ERR, "ctx.key@"xstr(__LINE__)": ",
95 DUMP_PREFIX_ADDRESS, 16, 4, key_in, keylen, 1);
96 print_hex_dump(KERN_ERR, "jobdesc@"xstr(__LINE__)": ",
97 DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
98#endif
99
100 result.err = 0;
101 init_completion(&result.completion);
102
103 ret = caam_jr_enqueue(jrdev, desc, split_key_done, &result);
104 if (!ret) {
105 /* in progress */
106 wait_for_completion_interruptible(&result.completion);
107 ret = result.err;
108#ifdef DEBUG
109 print_hex_dump(KERN_ERR, "ctx.key@"xstr(__LINE__)": ",
110 DUMP_PREFIX_ADDRESS, 16, 4, key_out,
111 split_key_pad_len, 1);
112#endif
113 }
114
115 dma_unmap_single(jrdev, dma_addr_out, split_key_pad_len,
116 DMA_FROM_DEVICE);
117 dma_unmap_single(jrdev, dma_addr_in, keylen, DMA_TO_DEVICE);
118
119 kfree(desc);
120
121 return ret;
122}
diff --git a/drivers/crypto/caam/key_gen.h b/drivers/crypto/caam/key_gen.h
new file mode 100644
index 000000000000..d95d290c6e8b
--- /dev/null
+++ b/drivers/crypto/caam/key_gen.h
@@ -0,0 +1,17 @@
1/*
2 * CAAM/SEC 4.x definitions for handling key-generation jobs
3 *
4 * Copyright 2008-2011 Freescale Semiconductor, Inc.
5 *
6 */
7
8struct split_key_result {
9 struct completion completion;
10 int err;
11};
12
13void split_key_done(struct device *dev, u32 *desc, u32 err, void *context);
14
15u32 gen_split_key(struct device *jrdev, u8 *key_out, int split_key_len,
16 int split_key_pad_len, const u8 *key_in, u32 keylen,
17 u32 alg_op);
diff --git a/drivers/crypto/caam/sg_link_tbl.h b/drivers/crypto/caam/sg_link_tbl.h
new file mode 100644
index 000000000000..6df434922460
--- /dev/null
+++ b/drivers/crypto/caam/sg_link_tbl.h
@@ -0,0 +1,84 @@
1/*
2 * CAAM/SEC 4.x functions for using scatterlists in caam driver
3 *
4 * Copyright 2008-2011 Freescale Semiconductor, Inc.
5 *
6 */
7
8struct link_tbl_entry;
9
10/*
11 * convert single dma address to h/w link table format
12 */
13static inline void sg_to_link_tbl_one(struct link_tbl_entry *link_tbl_ptr,
14 dma_addr_t dma, u32 len, u32 offset)
15{
16 link_tbl_ptr->ptr = dma;
17 link_tbl_ptr->len = len;
18 link_tbl_ptr->reserved = 0;
19 link_tbl_ptr->buf_pool_id = 0;
20 link_tbl_ptr->offset = offset;
21#ifdef DEBUG
22 print_hex_dump(KERN_ERR, "link_tbl_ptr@: ",
23 DUMP_PREFIX_ADDRESS, 16, 4, link_tbl_ptr,
24 sizeof(struct link_tbl_entry), 1);
25#endif
26}
27
28/*
29 * convert scatterlist to h/w link table format
30 * but does not have final bit; instead, returns last entry
31 */
32static inline struct link_tbl_entry *
33sg_to_link_tbl(struct scatterlist *sg, int sg_count,
34 struct link_tbl_entry *link_tbl_ptr, u32 offset)
35{
36 while (sg_count) {
37 sg_to_link_tbl_one(link_tbl_ptr, sg_dma_address(sg),
38 sg_dma_len(sg), offset);
39 link_tbl_ptr++;
40 sg = sg_next(sg);
41 sg_count--;
42 }
43 return link_tbl_ptr - 1;
44}
45
46/*
47 * convert scatterlist to h/w link table format
48 * scatterlist must have been previously dma mapped
49 */
50static inline void sg_to_link_tbl_last(struct scatterlist *sg, int sg_count,
51 struct link_tbl_entry *link_tbl_ptr,
52 u32 offset)
53{
54 link_tbl_ptr = sg_to_link_tbl(sg, sg_count, link_tbl_ptr, offset);
55 link_tbl_ptr->len |= LINK_TBL_LEN_FIN;
56}
57
58/* count number of elements in scatterlist */
59static inline int __sg_count(struct scatterlist *sg_list, int nbytes)
60{
61 struct scatterlist *sg = sg_list;
62 int sg_nents = 0;
63
64 while (nbytes > 0) {
65 sg_nents++;
66 nbytes -= sg->length;
67 if (!sg_is_last(sg) && (sg + 1)->length == 0)
68 BUG(); /* Not support chaining */
69 sg = scatterwalk_sg_next(sg);
70 }
71
72 return sg_nents;
73}
74
75/* derive number of elements in scatterlist, but return 0 for 1 */
76static inline int sg_count(struct scatterlist *sg_list, int nbytes)
77{
78 int sg_nents = __sg_count(sg_list, nbytes);
79
80 if (likely(sg_nents == 1))
81 return 0;
82
83 return sg_nents;
84}
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-24 21:13:03 -0500