Re: [PATCH 1/3] compressdev: support for dictionaries and PDCP checksum

[Patrick Robb <probb@iol.unh.edu>]

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The CI testing failure for this series is due to an issue with the traffic
generator that is unrelated to the patch. I will resolve it tomorrow and do
a test rerun.

On Wed, Sep 24, 2025 at 12:19 PM Sameer Vaze <svaze@qti.qualcomm.com> wrote:

> Adds definitions for PDCP checksums and apis to pass in
> dictionaries
>
> Signed-off-by: Sameer Vaze <svaze@qti.qualcomm.com>
> ---
>  lib/compressdev/rte_comp.h | 31 +++++++++++++++++++++++++++++++
>  1 file changed, 31 insertions(+)
>
> diff --git a/lib/compressdev/rte_comp.h b/lib/compressdev/rte_comp.h
> index 96d9b276dd..169d3d960e 100644
> --- a/lib/compressdev/rte_comp.h
> +++ b/lib/compressdev/rte_comp.h
> @@ -101,6 +101,10 @@ enum rte_comp_op_status {
>          * is not an error case. Output data up to op.produced can be used
> and
>          * next op in the stream should continue on from op.consumed+1.
>          */
> +       RTE_COMP_OP_STATUS_CHECK_SUM_VALIDATION_FAILED,
> +       /**< Checksum validation failed. Either calculated does checksum
> not match
> +        * the one provided or there was an error calculating the checksum
> +        */
>  };
>
>  /** Compression Algorithms */
> @@ -166,6 +170,10 @@ enum rte_comp_checksum_type {
>         /**< Generates a xxHash-32 checksum, as used by LZ4.
>          * https://github.com/Cyan4973/xxHash/blob/dev/doc/xxhash_spec.md
>          */
> +       RTE_COMP_CHECKSUM_3GPP_PDCP_UDC,
> +       /**< Generates checksum as defined under Uplink Data Compression
> +        * checksum as defined in the 3GPP PDCP specification
> +        */
>  };
>
>  /** Compression Huffman Type - used by DEFLATE algorithm */
> @@ -201,6 +209,11 @@ enum rte_comp_flush_flag {
>          */
>  };
>
> +#define        DEFLATE_MAX_WINDOW_SIZE (1ULL << 15)
> +
> +#define        DEFLATE_MIN_WINDOW_SIZE         (1ULL << 8)
> +
> +
>  /** Compression transform types */
>  enum rte_comp_xform_type {
>         RTE_COMP_COMPRESS,
> @@ -305,6 +318,15 @@ struct rte_comp_compress_xform {
>         /**< Hash algorithm to be used with compress operation. Hash is
> always
>          * done on plaintext.
>          */
> +       uint8_t *dictionary;
> +       /**<
> +        * Pointer to memory containing dictionary to be used for inflate
> +        * and deflate operations
> +        */
> +       uint16_t dictionary_len;
> +       /**<
> +        * Length of dictionary to be used
> +        */
>  };
>
>  /**
> @@ -328,6 +350,15 @@ struct rte_comp_decompress_xform {
>         /**< Hash algorithm to be used with decompress operation. Hash is
> always
>          * done on plaintext.
>          */
> +       uint8_t *dictionary;
> +       /**<
> +        * Pointer to memory containing dictionary to be used for inflate
> +        * and deflate operations
> +        */
> +       uint16_t dictionary_len;
> +       /**<
> +        * Length of dictionary to be used
> +        */
>  };
>
>  /**
> --
> 2.31.1
>
>

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