[PATCH v3 1/4] compressdev: support for dictionaries and PDCP checksum

[Sameer Vaze]

Adds definitions for PDCP checksums and apis to pass in
dictionaries

Signed-off-by: Sameer Vaze <svaze at qti.qualcomm.com>
---
v3:
* Renamed checksum validation enum
* Added missed comments for window size enum

 lib/compressdev/rte_comp.h | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/lib/compressdev/rte_comp.h b/lib/compressdev/rte_comp.h
index 96d9b276dd..c5ff708a4c 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_CHECKSUM_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)
+/** Max window size supported by deflate. Used when setting or getting pre
+ * defined dictionaries
+ */
+
 /** Compression transform types */
 enum rte_comp_xform_type {
 	RTE_COMP_COMPRESS,
@@ -228,6 +241,18 @@ enum rte_comp_op_type {
 struct rte_comp_deflate_params {
 	enum rte_comp_huffman huffman;
 	/**< Compression huffman encoding type */
+	uint8_t *dictionary;
+	/**< Pointer to memory containing dictionary to be used for deflate operations */
+	uint16_t dictionary_len;
+	/**< Length of dictionary to be used */
+};
+
+/** Parameters specific to the inflate algorithm */
+struct rte_comp_inflate_params {
+	uint8_t *dictionary;
+	/**< Pointer to memory containing dictionary to be used for inflate operations */
+	uint16_t dictionary_len;
+	/**< Length of dictionary to be used */
 };
 
 /**
@@ -321,6 +346,8 @@ struct rte_comp_decompress_xform {
 	 * setup of stream or private_xform should fail.
 	 */
 	union {
+		struct rte_comp_inflate_params inflate;
+		/**< Parameters specific to the deflate algorithm */
 		struct rte_comp_lz4_params lz4;
 		/**< Parameters specific to the LZ4 algorithm */
 	}; /**< Algorithm specific parameters */
-- 
2.31.1