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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>
This commit is contained in:
Yuan Kang
Herbert Xu
parent
8009a383f2
commit
4c1ec1f930
@ -5,4 +5,4 @@
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obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM) += caam.o
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obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_CRYPTO_API) += caamalg.o
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caam-objs := ctrl.o jr.o error.o
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caam-objs := ctrl.o jr.o error.o key_gen.o
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@ -51,6 +51,8 @@
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#include "desc_constr.h"
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#include "jr.h"
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#include "error.h"
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#include "sg_link_tbl.h"
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#include "key_gen.h"
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/*
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* crypto alg
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@ -453,121 +455,12 @@ static int aead_setauthsize(struct crypto_aead *authenc,
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return 0;
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}
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struct split_key_result {
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struct completion completion;
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int err;
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};
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static void split_key_done(struct device *dev, u32 *desc, u32 err,
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void *context)
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static u32 gen_split_aead_key(struct caam_ctx *ctx, const u8 *key_in,
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u32 authkeylen)
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{
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struct split_key_result *res = context;
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#ifdef DEBUG
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dev_err(dev, "%s %d: err 0x%x\n", __func__, __LINE__, err);
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#endif
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if (err) {
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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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}
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res->err = err;
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complete(&res->completion);
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}
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/*
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get a split ipad/opad key
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Split key generation-----------------------------------------------
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[00] 0xb0810008 jobdesc: stidx=1 share=never len=8
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[01] 0x04000014 key: class2->keyreg len=20
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@0xffe01000
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[03] 0x84410014 operation: cls2-op sha1 hmac init dec
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[04] 0x24940000 fifold: class2 msgdata-last2 len=0 imm
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[05] 0xa4000001 jump: class2 local all ->1 [06]
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[06] 0x64260028 fifostr: class2 mdsplit-jdk len=40
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@0xffe04000
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*/
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static u32 gen_split_key(struct caam_ctx *ctx, const u8 *key_in, u32 authkeylen)
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{
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struct device *jrdev = ctx->jrdev;
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u32 *desc;
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struct split_key_result result;
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dma_addr_t dma_addr_in, dma_addr_out;
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int ret = 0;
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desc = kmalloc(CAAM_CMD_SZ * 6 + CAAM_PTR_SZ * 2, GFP_KERNEL | GFP_DMA);
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init_job_desc(desc, 0);
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dma_addr_in = dma_map_single(jrdev, (void *)key_in, authkeylen,
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DMA_TO_DEVICE);
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if (dma_mapping_error(jrdev, dma_addr_in)) {
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dev_err(jrdev, "unable to map key input memory\n");
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kfree(desc);
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return -ENOMEM;
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}
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append_key(desc, dma_addr_in, authkeylen, CLASS_2 |
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KEY_DEST_CLASS_REG);
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/* Sets MDHA up into an HMAC-INIT */
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append_operation(desc, ctx->alg_op | OP_ALG_DECRYPT |
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OP_ALG_AS_INIT);
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/*
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* do a FIFO_LOAD of zero, this will trigger the internal key expansion
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into both pads inside MDHA
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*/
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append_fifo_load_as_imm(desc, NULL, 0, LDST_CLASS_2_CCB |
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FIFOLD_TYPE_MSG | FIFOLD_TYPE_LAST2);
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/*
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* FIFO_STORE with the explicit split-key content store
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* (0x26 output type)
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*/
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dma_addr_out = dma_map_single(jrdev, ctx->key, ctx->split_key_pad_len,
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DMA_FROM_DEVICE);
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if (dma_mapping_error(jrdev, dma_addr_out)) {
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dev_err(jrdev, "unable to map key output memory\n");
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kfree(desc);
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return -ENOMEM;
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}
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append_fifo_store(desc, dma_addr_out, ctx->split_key_len,
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LDST_CLASS_2_CCB | FIFOST_TYPE_SPLIT_KEK);
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#ifdef DEBUG
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print_hex_dump(KERN_ERR, "ctx.key@"xstr(__LINE__)": ",
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DUMP_PREFIX_ADDRESS, 16, 4, key_in, authkeylen, 1);
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print_hex_dump(KERN_ERR, "jobdesc@"xstr(__LINE__)": ",
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DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
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#endif
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result.err = 0;
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init_completion(&result.completion);
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ret = caam_jr_enqueue(jrdev, desc, split_key_done, &result);
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if (!ret) {
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/* in progress */
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wait_for_completion_interruptible(&result.completion);
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ret = result.err;
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#ifdef DEBUG
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print_hex_dump(KERN_ERR, "ctx.key@"xstr(__LINE__)": ",
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DUMP_PREFIX_ADDRESS, 16, 4, ctx->key,
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ctx->split_key_pad_len, 1);
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#endif
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}
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dma_unmap_single(jrdev, dma_addr_out, ctx->split_key_pad_len,
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DMA_FROM_DEVICE);
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dma_unmap_single(jrdev, dma_addr_in, authkeylen, DMA_TO_DEVICE);
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kfree(desc);
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return ret;
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return gen_split_key(ctx->jrdev, ctx->key, ctx->split_key_len,
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ctx->split_key_pad_len, key_in, authkeylen,
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ctx->alg_op);
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}
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static int aead_setkey(struct crypto_aead *aead,
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@ -611,7 +504,7 @@ static int aead_setkey(struct crypto_aead *aead,
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DUMP_PREFIX_ADDRESS, 16, 4, key, keylen, 1);
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#endif
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ret = gen_split_key(ctx, key, authkeylen);
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ret = gen_split_aead_key(ctx, key, authkeylen);
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if (ret) {
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goto badkey;
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}
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@ -758,14 +651,6 @@ static int ablkcipher_setkey(struct crypto_ablkcipher *ablkcipher,
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return ret;
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}
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struct link_tbl_entry {
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u64 ptr;
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u32 len;
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u8 reserved;
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u8 buf_pool_id;
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u16 offset;
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};
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/*
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* aead_edesc - s/w-extended aead descriptor
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* @assoc_nents: number of segments in associated data (SPI+Seq) scatterlist
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@ -1027,50 +912,6 @@ static void ablkcipher_decrypt_done(struct device *jrdev, u32 *desc, u32 err,
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ablkcipher_request_complete(req, err);
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}
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static void sg_to_link_tbl_one(struct link_tbl_entry *link_tbl_ptr,
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dma_addr_t dma, u32 len, u32 offset)
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{
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link_tbl_ptr->ptr = dma;
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link_tbl_ptr->len = len;
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link_tbl_ptr->reserved = 0;
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link_tbl_ptr->buf_pool_id = 0;
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link_tbl_ptr->offset = offset;
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#ifdef DEBUG
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print_hex_dump(KERN_ERR, "link_tbl_ptr@"xstr(__LINE__)": ",
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DUMP_PREFIX_ADDRESS, 16, 4, link_tbl_ptr,
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sizeof(struct link_tbl_entry), 1);
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#endif
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}
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/*
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* convert scatterlist to h/w link table format
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* but does not have final bit; instead, returns last entry
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*/
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static struct link_tbl_entry *sg_to_link_tbl(struct scatterlist *sg,
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int sg_count, struct link_tbl_entry
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*link_tbl_ptr, u32 offset)
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{
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while (sg_count) {
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sg_to_link_tbl_one(link_tbl_ptr, sg_dma_address(sg),
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sg_dma_len(sg), offset);
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link_tbl_ptr++;
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sg = sg_next(sg);
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sg_count--;
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}
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return link_tbl_ptr - 1;
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}
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/*
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* convert scatterlist to h/w link table format
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* scatterlist must have been previously dma mapped
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*/
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static void sg_to_link_tbl_last(struct scatterlist *sg, int sg_count,
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struct link_tbl_entry *link_tbl_ptr, u32 offset)
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{
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link_tbl_ptr = sg_to_link_tbl(sg, sg_count, link_tbl_ptr, offset);
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link_tbl_ptr->len |= 0x40000000;
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}
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/*
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* Fill in aead job descriptor
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*/
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@ -1271,28 +1112,6 @@ static void init_ablkcipher_job(u32 *sh_desc, dma_addr_t ptr,
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append_seq_out_ptr(desc, dst_dma, req->nbytes, out_options);
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}
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/*
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* derive number of elements in scatterlist
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*/
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static int sg_count(struct scatterlist *sg_list, int nbytes)
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{
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struct scatterlist *sg = sg_list;
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int sg_nents = 0;
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while (nbytes > 0) {
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sg_nents++;
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nbytes -= sg->length;
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if (!sg_is_last(sg) && (sg + 1)->length == 0)
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BUG(); /* Not support chaining */
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sg = scatterwalk_sg_next(sg);
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}
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if (likely(sg_nents == 1))
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return 0;
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return sg_nents;
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}
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/*
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* allocate and map the aead extended descriptor
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*/
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@ -8,6 +8,16 @@
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#ifndef DESC_H
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#define DESC_H
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struct link_tbl_entry {
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u64 ptr;
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#define LINK_TBL_LEN_FIN 0x40000000
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#define LINK_TBL_LEN_EXT 0x80000000
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u32 len;
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u8 reserved;
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u8 buf_pool_id;
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u16 offset;
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};
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/* Max size of any CAAM descriptor in 32-bit words, inclusive of header */
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#define MAX_CAAM_DESCSIZE 64
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122
drivers/crypto/caam/key_gen.c
Normal file
122
drivers/crypto/caam/key_gen.c
Normal file
@ -0,0 +1,122 @@
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/*
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* CAAM/SEC 4.x functions for handling key-generation jobs
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*
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* Copyright 2008-2011 Freescale Semiconductor, Inc.
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*
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*/
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#include "compat.h"
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#include "jr.h"
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#include "error.h"
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#include "desc_constr.h"
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#include "key_gen.h"
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void split_key_done(struct device *dev, u32 *desc, u32 err,
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void *context)
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{
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struct split_key_result *res = context;
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#ifdef DEBUG
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dev_err(dev, "%s %d: err 0x%x\n", __func__, __LINE__, err);
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#endif
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if (err) {
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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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}
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res->err = err;
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complete(&res->completion);
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}
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EXPORT_SYMBOL(split_key_done);
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/*
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get a split ipad/opad key
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Split key generation-----------------------------------------------
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[00] 0xb0810008 jobdesc: stidx=1 share=never len=8
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[01] 0x04000014 key: class2->keyreg len=20
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@0xffe01000
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[03] 0x84410014 operation: cls2-op sha1 hmac init dec
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[04] 0x24940000 fifold: class2 msgdata-last2 len=0 imm
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[05] 0xa4000001 jump: class2 local all ->1 [06]
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[06] 0x64260028 fifostr: class2 mdsplit-jdk len=40
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@0xffe04000
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*/
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u32 gen_split_key(struct device *jrdev, u8 *key_out, int split_key_len,
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int split_key_pad_len, const u8 *key_in, u32 keylen,
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u32 alg_op)
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{
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u32 *desc;
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struct split_key_result result;
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dma_addr_t dma_addr_in, dma_addr_out;
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int ret = 0;
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desc = kmalloc(CAAM_CMD_SZ * 6 + CAAM_PTR_SZ * 2, GFP_KERNEL | GFP_DMA);
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init_job_desc(desc, 0);
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dma_addr_in = dma_map_single(jrdev, (void *)key_in, keylen,
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DMA_TO_DEVICE);
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if (dma_mapping_error(jrdev, dma_addr_in)) {
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dev_err(jrdev, "unable to map key input memory\n");
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kfree(desc);
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return -ENOMEM;
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}
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append_key(desc, dma_addr_in, keylen, CLASS_2 | KEY_DEST_CLASS_REG);
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/* Sets MDHA up into an HMAC-INIT */
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append_operation(desc, alg_op | OP_ALG_DECRYPT | OP_ALG_AS_INIT);
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/*
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* do a FIFO_LOAD of zero, this will trigger the internal key expansion
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* into both pads inside MDHA
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*/
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append_fifo_load_as_imm(desc, NULL, 0, LDST_CLASS_2_CCB |
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FIFOLD_TYPE_MSG | FIFOLD_TYPE_LAST2);
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/*
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* FIFO_STORE with the explicit split-key content store
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* (0x26 output type)
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*/
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dma_addr_out = dma_map_single(jrdev, key_out, split_key_pad_len,
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DMA_FROM_DEVICE);
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if (dma_mapping_error(jrdev, dma_addr_out)) {
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dev_err(jrdev, "unable to map key output memory\n");
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kfree(desc);
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return -ENOMEM;
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}
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append_fifo_store(desc, dma_addr_out, split_key_len,
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LDST_CLASS_2_CCB | FIFOST_TYPE_SPLIT_KEK);
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#ifdef DEBUG
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print_hex_dump(KERN_ERR, "ctx.key@"xstr(__LINE__)": ",
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DUMP_PREFIX_ADDRESS, 16, 4, key_in, keylen, 1);
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print_hex_dump(KERN_ERR, "jobdesc@"xstr(__LINE__)": ",
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DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
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#endif
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result.err = 0;
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init_completion(&result.completion);
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ret = caam_jr_enqueue(jrdev, desc, split_key_done, &result);
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if (!ret) {
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/* in progress */
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wait_for_completion_interruptible(&result.completion);
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ret = result.err;
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#ifdef DEBUG
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print_hex_dump(KERN_ERR, "ctx.key@"xstr(__LINE__)": ",
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DUMP_PREFIX_ADDRESS, 16, 4, key_out,
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split_key_pad_len, 1);
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#endif
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}
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dma_unmap_single(jrdev, dma_addr_out, split_key_pad_len,
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DMA_FROM_DEVICE);
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dma_unmap_single(jrdev, dma_addr_in, keylen, DMA_TO_DEVICE);
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kfree(desc);
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return ret;
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}
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17
drivers/crypto/caam/key_gen.h
Normal file
17
drivers/crypto/caam/key_gen.h
Normal file
@ -0,0 +1,17 @@
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/*
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* CAAM/SEC 4.x definitions for handling key-generation jobs
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*
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* Copyright 2008-2011 Freescale Semiconductor, Inc.
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*
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*/
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struct split_key_result {
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struct completion completion;
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int err;
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};
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void split_key_done(struct device *dev, u32 *desc, u32 err, void *context);
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u32 gen_split_key(struct device *jrdev, u8 *key_out, int split_key_len,
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int split_key_pad_len, const u8 *key_in, u32 keylen,
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u32 alg_op);
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84
drivers/crypto/caam/sg_link_tbl.h
Normal file
84
drivers/crypto/caam/sg_link_tbl.h
Normal file
@ -0,0 +1,84 @@
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/*
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* CAAM/SEC 4.x functions for using scatterlists in caam driver
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*
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* Copyright 2008-2011 Freescale Semiconductor, Inc.
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*
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*/
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struct link_tbl_entry;
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/*
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* convert single dma address to h/w link table format
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*/
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static inline void sg_to_link_tbl_one(struct link_tbl_entry *link_tbl_ptr,
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dma_addr_t dma, u32 len, u32 offset)
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{
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link_tbl_ptr->ptr = dma;
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link_tbl_ptr->len = len;
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link_tbl_ptr->reserved = 0;
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link_tbl_ptr->buf_pool_id = 0;
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link_tbl_ptr->offset = offset;
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#ifdef DEBUG
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print_hex_dump(KERN_ERR, "link_tbl_ptr@: ",
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DUMP_PREFIX_ADDRESS, 16, 4, link_tbl_ptr,
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sizeof(struct link_tbl_entry), 1);
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#endif
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}
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/*
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* convert scatterlist to h/w link table format
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* but does not have final bit; instead, returns last entry
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*/
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static inline struct link_tbl_entry *
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sg_to_link_tbl(struct scatterlist *sg, int sg_count,
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struct link_tbl_entry *link_tbl_ptr, u32 offset)
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{
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while (sg_count) {
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sg_to_link_tbl_one(link_tbl_ptr, sg_dma_address(sg),
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sg_dma_len(sg), offset);
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link_tbl_ptr++;
|
||||
sg = sg_next(sg);
|
||||
sg_count--;
|
||||
}
|
||||
return link_tbl_ptr - 1;
|
||||
}
|
||||
|
||||
/*
|
||||
* convert scatterlist to h/w link table format
|
||||
* scatterlist must have been previously dma mapped
|
||||
*/
|
||||
static inline void sg_to_link_tbl_last(struct scatterlist *sg, int sg_count,
|
||||
struct link_tbl_entry *link_tbl_ptr,
|
||||
u32 offset)
|
||||
{
|
||||
link_tbl_ptr = sg_to_link_tbl(sg, sg_count, link_tbl_ptr, offset);
|
||||
link_tbl_ptr->len |= LINK_TBL_LEN_FIN;
|
||||
}
|
||||
|
||||
/* count number of elements in scatterlist */
|
||||
static inline int __sg_count(struct scatterlist *sg_list, int nbytes)
|
||||
{
|
||||
struct scatterlist *sg = sg_list;
|
||||
int sg_nents = 0;
|
||||
|
||||
while (nbytes > 0) {
|
||||
sg_nents++;
|
||||
nbytes -= sg->length;
|
||||
if (!sg_is_last(sg) && (sg + 1)->length == 0)
|
||||
BUG(); /* Not support chaining */
|
||||
sg = scatterwalk_sg_next(sg);
|
||||
}
|
||||
|
||||
return sg_nents;
|
||||
}
|
||||
|
||||
/* derive number of elements in scatterlist, but return 0 for 1 */
|
||||
static inline int sg_count(struct scatterlist *sg_list, int nbytes)
|
||||
{
|
||||
int sg_nents = __sg_count(sg_list, nbytes);
|
||||
|
||||
if (likely(sg_nents == 1))
|
||||
return 0;
|
||||
|
||||
return sg_nents;
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user