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author | Yuan Kang <Yuan.Kang@freescale.com> | 2012-06-23 00:48:46 (GMT) |
---|---|---|
committer | Herbert Xu <herbert@gondor.apana.org.au> | 2012-06-27 06:42:05 (GMT) |
commit | a299c837040bb47810b9d287dfe7deed6a254995 (patch) | |
tree | 0993aa7a03473e04576785e3450bd6b50ff815c2 /drivers/crypto/caam/sg_sw_sec4.h | |
parent | 4c1ec1f9301549db229bc6dce916f8a99d1f82d6 (diff) | |
download | linux-a299c837040bb47810b9d287dfe7deed6a254995.tar.xz |
crypto: caam - link_tbl rename
- rename scatterlist and link_tbl functions
- link_tbl changed to sec4_sg
- sg_to_link_tbl_one changed to dma_to_sec4_sg_one,
since no scatterlist is use
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/sg_sw_sec4.h')
-rw-r--r-- | drivers/crypto/caam/sg_sw_sec4.h | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/drivers/crypto/caam/sg_sw_sec4.h b/drivers/crypto/caam/sg_sw_sec4.h new file mode 100644 index 0000000..a6ad7a4 --- /dev/null +++ b/drivers/crypto/caam/sg_sw_sec4.h @@ -0,0 +1,84 @@ +/* + * CAAM/SEC 4.x functions for using scatterlists in caam driver + * + * Copyright 2008-2011 Freescale Semiconductor, Inc. + * + */ + +struct sec4_sg_entry; + +/* + * convert single dma address to h/w link table format + */ +static inline void dma_to_sec4_sg_one(struct sec4_sg_entry *sec4_sg_ptr, + dma_addr_t dma, u32 len, u32 offset) +{ + sec4_sg_ptr->ptr = dma; + sec4_sg_ptr->len = len; + sec4_sg_ptr->reserved = 0; + sec4_sg_ptr->buf_pool_id = 0; + sec4_sg_ptr->offset = offset; +#ifdef DEBUG + print_hex_dump(KERN_ERR, "sec4_sg_ptr@: ", + DUMP_PREFIX_ADDRESS, 16, 4, sec4_sg_ptr, + sizeof(struct sec4_sg_entry), 1); +#endif +} + +/* + * convert scatterlist to h/w link table format + * but does not have final bit; instead, returns last entry + */ +static inline struct sec4_sg_entry * +sg_to_sec4_sg(struct scatterlist *sg, int sg_count, + struct sec4_sg_entry *sec4_sg_ptr, u32 offset) +{ + while (sg_count) { + dma_to_sec4_sg_one(sec4_sg_ptr, sg_dma_address(sg), + sg_dma_len(sg), offset); + sec4_sg_ptr++; + sg = sg_next(sg); + sg_count--; + } + return sec4_sg_ptr - 1; +} + +/* + * convert scatterlist to h/w link table format + * scatterlist must have been previously dma mapped + */ +static inline void sg_to_sec4_sg_last(struct scatterlist *sg, int sg_count, + struct sec4_sg_entry *sec4_sg_ptr, + u32 offset) +{ + sec4_sg_ptr = sg_to_sec4_sg(sg, sg_count, sec4_sg_ptr, offset); + sec4_sg_ptr->len |= SEC4_SG_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; +} |