This source file includes following definitions.
- split_key_done
- gen_split_key
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8 #include "compat.h"
9 #include "jr.h"
10 #include "error.h"
11 #include "desc_constr.h"
12 #include "key_gen.h"
13
14 void split_key_done(struct device *dev, u32 *desc, u32 err,
15 void *context)
16 {
17 struct split_key_result *res = context;
18 int ecode = 0;
19
20 dev_dbg(dev, "%s %d: err 0x%x\n", __func__, __LINE__, err);
21
22 if (err)
23 ecode = caam_jr_strstatus(dev, err);
24
25 res->err = ecode;
26
27 complete(&res->completion);
28 }
29 EXPORT_SYMBOL(split_key_done);
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43
44 int gen_split_key(struct device *jrdev, u8 *key_out,
45 struct alginfo * const adata, const u8 *key_in, u32 keylen,
46 int max_keylen)
47 {
48 u32 *desc;
49 struct split_key_result result;
50 dma_addr_t dma_addr;
51 unsigned int local_max;
52 int ret = -ENOMEM;
53
54 adata->keylen = split_key_len(adata->algtype & OP_ALG_ALGSEL_MASK);
55 adata->keylen_pad = split_key_pad_len(adata->algtype &
56 OP_ALG_ALGSEL_MASK);
57 local_max = max(keylen, adata->keylen_pad);
58
59 dev_dbg(jrdev, "split keylen %d split keylen padded %d\n",
60 adata->keylen, adata->keylen_pad);
61 print_hex_dump_debug("ctx.key@" __stringify(__LINE__)": ",
62 DUMP_PREFIX_ADDRESS, 16, 4, key_in, keylen, 1);
63
64 if (local_max > max_keylen)
65 return -EINVAL;
66
67 desc = kmalloc(CAAM_CMD_SZ * 6 + CAAM_PTR_SZ * 2, GFP_KERNEL | GFP_DMA);
68 if (!desc) {
69 dev_err(jrdev, "unable to allocate key input memory\n");
70 return ret;
71 }
72
73 memcpy(key_out, key_in, keylen);
74
75 dma_addr = dma_map_single(jrdev, key_out, local_max, DMA_BIDIRECTIONAL);
76 if (dma_mapping_error(jrdev, dma_addr)) {
77 dev_err(jrdev, "unable to map key memory\n");
78 goto out_free;
79 }
80
81 init_job_desc(desc, 0);
82 append_key(desc, dma_addr, keylen, CLASS_2 | KEY_DEST_CLASS_REG);
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85 append_operation(desc, (adata->algtype & OP_ALG_ALGSEL_MASK) |
86 OP_ALG_AAI_HMAC | OP_TYPE_CLASS2_ALG | OP_ALG_DECRYPT |
87 OP_ALG_AS_INIT);
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93 append_fifo_load_as_imm(desc, NULL, 0, LDST_CLASS_2_CCB |
94 FIFOLD_TYPE_MSG | FIFOLD_TYPE_LAST2);
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100 append_fifo_store(desc, dma_addr, adata->keylen,
101 LDST_CLASS_2_CCB | FIFOST_TYPE_SPLIT_KEK);
102
103 print_hex_dump_debug("jobdesc@"__stringify(__LINE__)": ",
104 DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc),
105 1);
106
107 result.err = 0;
108 init_completion(&result.completion);
109
110 ret = caam_jr_enqueue(jrdev, desc, split_key_done, &result);
111 if (!ret) {
112
113 wait_for_completion(&result.completion);
114 ret = result.err;
115
116 print_hex_dump_debug("ctx.key@"__stringify(__LINE__)": ",
117 DUMP_PREFIX_ADDRESS, 16, 4, key_out,
118 adata->keylen_pad, 1);
119 }
120
121 dma_unmap_single(jrdev, dma_addr, local_max, DMA_BIDIRECTIONAL);
122 out_free:
123 kfree(desc);
124 return ret;
125 }
126 EXPORT_SYMBOL(gen_split_key);