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* crypto: 842 - Add CRC and validation supportHaren Myneni2015-10-143-0/+32
| | | | | | | | | | | | This patch adds CRC generation and validation support for nx-842. Add CRC flag so that nx842 coprocessor includes CRC during compression and validates during decompression. Also changes in 842 SW compression to append CRC value at the end of template and checks during decompression. Signed-off-by: Haren Myneni <haren@us.ibm.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* lib: correct 842 decompress for 32 bitDan Streetman2015-05-131-1/+1
| | | | | | | | | Avoid 64 bit mod operation, which won't work on 32 bit systems. Simple subtraction can be used instead in this case. Reported-By: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: Dan Streetman <ddstreet@ieee.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* lib: make lib/842 decompress functions staticDan Streetman2015-05-131-2/+2
| | | | | | | | | | | | Make the do_index and do_op functions static. They are used only internally by the 842 decompression function, and should be static. Reported-By: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: Dan Streetman <ddstreet@ieee.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* lib: add software 842 compression/decompressionDan Streetman2015-05-115-0/+1212
Add 842-format software compression and decompression functions. Update the MAINTAINERS 842 section to include the new files. The 842 compression function can compress any input data into the 842 compression format. The 842 decompression function can decompress any standard-format 842 compressed data - specifically, either a compressed data buffer created by the 842 software compression function, or a compressed data buffer created by the 842 hardware compressor (located in PowerPC coprocessors). The 842 compressed data format is explained in the header comments. This is used in a later patch to provide a full software 842 compression and decompression crypto interface. Signed-off-by: Dan Streetman <ddstreet@ieee.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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