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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>
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Yuan Kang
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Herbert Xu
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Jun 27, 2012
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,122 @@ | ||
| /* | ||
| * CAAM/SEC 4.x functions for handling key-generation jobs | ||
| * | ||
| * Copyright 2008-2011 Freescale Semiconductor, Inc. | ||
| * | ||
| */ | ||
| #include "compat.h" | ||
| #include "jr.h" | ||
| #include "error.h" | ||
| #include "desc_constr.h" | ||
| #include "key_gen.h" | ||
|
|
||
| void split_key_done(struct device *dev, u32 *desc, u32 err, | ||
| void *context) | ||
| { | ||
| struct split_key_result *res = context; | ||
|
|
||
| #ifdef DEBUG | ||
| dev_err(dev, "%s %d: err 0x%x\n", __func__, __LINE__, err); | ||
| #endif | ||
|
|
||
| if (err) { | ||
| char tmp[CAAM_ERROR_STR_MAX]; | ||
|
|
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| dev_err(dev, "%08x: %s\n", err, caam_jr_strstatus(tmp, err)); | ||
| } | ||
|
|
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| res->err = err; | ||
|
|
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| complete(&res->completion); | ||
| } | ||
| EXPORT_SYMBOL(split_key_done); | ||
| /* | ||
| get a split ipad/opad key | ||
| Split key generation----------------------------------------------- | ||
| [00] 0xb0810008 jobdesc: stidx=1 share=never len=8 | ||
| [01] 0x04000014 key: class2->keyreg len=20 | ||
| @0xffe01000 | ||
| [03] 0x84410014 operation: cls2-op sha1 hmac init dec | ||
| [04] 0x24940000 fifold: class2 msgdata-last2 len=0 imm | ||
| [05] 0xa4000001 jump: class2 local all ->1 [06] | ||
| [06] 0x64260028 fifostr: class2 mdsplit-jdk len=40 | ||
| @0xffe04000 | ||
| */ | ||
| u32 gen_split_key(struct device *jrdev, u8 *key_out, int split_key_len, | ||
| int split_key_pad_len, const u8 *key_in, u32 keylen, | ||
| u32 alg_op) | ||
| { | ||
| u32 *desc; | ||
| struct split_key_result result; | ||
| dma_addr_t dma_addr_in, dma_addr_out; | ||
| int ret = 0; | ||
|
|
||
| desc = kmalloc(CAAM_CMD_SZ * 6 + CAAM_PTR_SZ * 2, GFP_KERNEL | GFP_DMA); | ||
|
|
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| init_job_desc(desc, 0); | ||
|
|
||
| dma_addr_in = dma_map_single(jrdev, (void *)key_in, keylen, | ||
| DMA_TO_DEVICE); | ||
| if (dma_mapping_error(jrdev, dma_addr_in)) { | ||
| dev_err(jrdev, "unable to map key input memory\n"); | ||
| kfree(desc); | ||
| return -ENOMEM; | ||
| } | ||
| append_key(desc, dma_addr_in, keylen, CLASS_2 | KEY_DEST_CLASS_REG); | ||
|
|
||
| /* Sets MDHA up into an HMAC-INIT */ | ||
| append_operation(desc, alg_op | OP_ALG_DECRYPT | OP_ALG_AS_INIT); | ||
|
|
||
| /* | ||
| * do a FIFO_LOAD of zero, this will trigger the internal key expansion | ||
| * into both pads inside MDHA | ||
| */ | ||
| append_fifo_load_as_imm(desc, NULL, 0, LDST_CLASS_2_CCB | | ||
| FIFOLD_TYPE_MSG | FIFOLD_TYPE_LAST2); | ||
|
|
||
| /* | ||
| * FIFO_STORE with the explicit split-key content store | ||
| * (0x26 output type) | ||
| */ | ||
| dma_addr_out = dma_map_single(jrdev, key_out, split_key_pad_len, | ||
| DMA_FROM_DEVICE); | ||
| if (dma_mapping_error(jrdev, dma_addr_out)) { | ||
| dev_err(jrdev, "unable to map key output memory\n"); | ||
| kfree(desc); | ||
| return -ENOMEM; | ||
| } | ||
| append_fifo_store(desc, dma_addr_out, split_key_len, | ||
| LDST_CLASS_2_CCB | FIFOST_TYPE_SPLIT_KEK); | ||
|
|
||
| #ifdef DEBUG | ||
| print_hex_dump(KERN_ERR, "ctx.key@"xstr(__LINE__)": ", | ||
| DUMP_PREFIX_ADDRESS, 16, 4, key_in, keylen, 1); | ||
| print_hex_dump(KERN_ERR, "jobdesc@"xstr(__LINE__)": ", | ||
| DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1); | ||
| #endif | ||
|
|
||
| result.err = 0; | ||
| init_completion(&result.completion); | ||
|
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| ret = caam_jr_enqueue(jrdev, desc, split_key_done, &result); | ||
| if (!ret) { | ||
| /* in progress */ | ||
| wait_for_completion_interruptible(&result.completion); | ||
| ret = result.err; | ||
| #ifdef DEBUG | ||
| print_hex_dump(KERN_ERR, "ctx.key@"xstr(__LINE__)": ", | ||
| DUMP_PREFIX_ADDRESS, 16, 4, key_out, | ||
| split_key_pad_len, 1); | ||
| #endif | ||
| } | ||
|
|
||
| dma_unmap_single(jrdev, dma_addr_out, split_key_pad_len, | ||
| DMA_FROM_DEVICE); | ||
| dma_unmap_single(jrdev, dma_addr_in, keylen, DMA_TO_DEVICE); | ||
|
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||
| kfree(desc); | ||
|
|
||
| return ret; | ||
| } |
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