New upstream version 18.08upstream/18.08

Change-Id: I32fdf5e5016556d9c0a6d88ddaf1fc468961790a
Signed-off-by: Luca Boccassi <luca.boccassi@gmail.com>

1 files changed, 485 insertions, 0 deletions

diff --git a/lib/librte_compressdev/rte_comp.h b/lib/librte_compressdev/rte_comp.h
new file mode 100644
index 00000000..ee9056ea
--- /dev/null
+++ b/lib/librte_compressdev/rte_comp.h
@@ -0,0 +1,485 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2017-2018 Intel Corporation
+ */
+
+#ifndef _RTE_COMP_H_
+#define _RTE_COMP_H_
+
+/**
+ * @file rte_comp.h
+ *
+ * RTE definitions for Data Compression Service
+ *
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <rte_mempool.h>
+#include <rte_mbuf.h>
+
+/**
+ * compression service feature flags
+ *
+ * @note New features flags should be added to the end of the list
+ *
+ * Keep these flags synchronised with rte_comp_get_feature_name()
+ */
+#define RTE_COMP_FF_STATEFUL_COMPRESSION	(1ULL << 0)
+/**< Stateful compression is supported */
+#define RTE_COMP_FF_STATEFUL_DECOMPRESSION	(1ULL << 1)
+/**< Stateful decompression is supported */
+#define RTE_COMP_FF_OOP_SGL_IN_SGL_OUT		(1ULL << 2)
+/**< Out-of-place Scatter-gather (SGL) buffers,
+ * with multiple segments, are supported in input and output
+ */
+#define RTE_COMP_FF_OOP_SGL_IN_LB_OUT		(1ULL << 3)
+/**< Out-of-place Scatter-gather (SGL) buffers are supported
+ * in input, combined with linear buffers (LB), with a
+ * single segment, in output
+ */
+#define RTE_COMP_FF_OOP_LB_IN_SGL_OUT		(1ULL << 4)
+/**< Out-of-place Scatter-gather (SGL) buffers are supported
+ * in output, combined with linear buffers (LB) in input
+ */
+#define RTE_COMP_FF_ADLER32_CHECKSUM		(1ULL << 5)
+/**< Adler-32 Checksum is supported */
+#define RTE_COMP_FF_CRC32_CHECKSUM		(1ULL << 6)
+/**< CRC32 Checksum is supported */
+#define RTE_COMP_FF_CRC32_ADLER32_CHECKSUM	(1ULL << 7)
+/**< Adler-32/CRC32 Checksum is supported */
+#define RTE_COMP_FF_MULTI_PKT_CHECKSUM		(1ULL << 8)
+/**< Generation of checksum across multiple stateless packets is supported */
+#define RTE_COMP_FF_SHA1_HASH			(1ULL << 9)
+/**< SHA1 Hash is supported */
+#define RTE_COMP_FF_SHA2_SHA256_HASH		(1ULL << 10)
+/**< SHA256 Hash of SHA2 family is supported */
+#define RTE_COMP_FF_NONCOMPRESSED_BLOCKS	(1ULL << 11)
+/**< Creation of non-compressed blocks using RTE_COMP_LEVEL_NONE is supported */
+#define RTE_COMP_FF_SHAREABLE_PRIV_XFORM	(1ULL << 12)
+/**< Private xforms created by the PMD can be shared
+ * across multiple stateless operations. If not set, then app needs
+ * to create as many priv_xforms as it expects to have stateless
+ * operations in-flight.
+ */
+#define RTE_COMP_FF_HUFFMAN_FIXED		(1ULL << 13)
+/**< Fixed huffman encoding is supported */
+#define RTE_COMP_FF_HUFFMAN_DYNAMIC		(1ULL << 14)
+/**< Dynamic huffman encoding is supported */
+
+/** Status of comp operation */
+enum rte_comp_op_status {
+	RTE_COMP_OP_STATUS_SUCCESS = 0,
+	/**< Operation completed successfully */
+	RTE_COMP_OP_STATUS_NOT_PROCESSED,
+	/**< Operation has not yet been processed by the device */
+	RTE_COMP_OP_STATUS_INVALID_ARGS,
+	/**< Operation failed due to invalid arguments in request */
+	RTE_COMP_OP_STATUS_ERROR,
+	/**< Error handling operation */
+	RTE_COMP_OP_STATUS_INVALID_STATE,
+	/**< Operation is invoked in invalid state */
+	RTE_COMP_OP_STATUS_OUT_OF_SPACE_TERMINATED,
+	/**< Output buffer ran out of space before operation completed.
+	 * Error case. Application must resubmit all data with a larger
+	 * output buffer.
+	 */
+	RTE_COMP_OP_STATUS_OUT_OF_SPACE_RECOVERABLE,
+	/**< Output buffer ran out of space before operation completed, but this
+	 * 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.
+	 */
+};
+
+/** Compression Algorithms */
+enum rte_comp_algorithm {
+	RTE_COMP_ALGO_UNSPECIFIED = 0,
+	/** No Compression algorithm */
+	RTE_COMP_ALGO_NULL,
+	/**< No compression.
+	 * Pass-through, data is copied unchanged from source buffer to
+	 * destination buffer.
+	 */
+	RTE_COMP_ALGO_DEFLATE,
+	/**< DEFLATE compression algorithm
+	 * https://tools.ietf.org/html/rfc1951
+	 */
+	RTE_COMP_ALGO_LZS,
+	/**< LZS compression algorithm
+	 * https://tools.ietf.org/html/rfc2395
+	 */
+	RTE_COMP_ALGO_LIST_END
+};
+
+/** Compression Hash Algorithms */
+enum rte_comp_hash_algorithm {
+	RTE_COMP_HASH_ALGO_NONE = 0,
+	/**< No hash */
+	RTE_COMP_HASH_ALGO_SHA1,
+	/**< SHA1 hash algorithm */
+	RTE_COMP_HASH_ALGO_SHA2_256,
+	/**< SHA256 hash algorithm of SHA2 family */
+	RTE_COMP_HASH_ALGO_LIST_END
+};
+
+/**< Compression Level.
+ * The number is interpreted by each PMD differently. However, lower numbers
+ * give fastest compression, at the expense of compression ratio while
+ * higher numbers may give better compression ratios but are likely slower.
+ */
+#define	RTE_COMP_LEVEL_PMD_DEFAULT	(-1)
+/** Use PMD Default */
+#define	RTE_COMP_LEVEL_NONE		(0)
+/** Output uncompressed blocks if supported by the specified algorithm */
+#define RTE_COMP_LEVEL_MIN		(1)
+/** Use minimum compression level supported by the PMD */
+#define RTE_COMP_LEVEL_MAX		(9)
+/** Use maximum compression level supported by the PMD */
+
+/** Compression checksum types */
+enum rte_comp_checksum_type {
+	RTE_COMP_CHECKSUM_NONE,
+	/**< No checksum generated */
+	RTE_COMP_CHECKSUM_CRC32,
+	/**< Generates a CRC32 checksum, as used by gzip */
+	RTE_COMP_CHECKSUM_ADLER32,
+	/**< Generates an Adler-32 checksum, as used by zlib */
+	RTE_COMP_CHECKSUM_CRC32_ADLER32,
+	/**< Generates both Adler-32 and CRC32 checksums, concatenated.
+	 * CRC32 is in the lower 32bits, Adler-32 in the upper 32 bits.
+	 */
+};
+
+
+/** Compression Huffman Type - used by DEFLATE algorithm */
+enum rte_comp_huffman {
+	RTE_COMP_HUFFMAN_DEFAULT,
+	/**< PMD may choose which Huffman codes to use */
+	RTE_COMP_HUFFMAN_FIXED,
+	/**< Use Fixed Huffman codes */
+	RTE_COMP_HUFFMAN_DYNAMIC,
+	/**< Use Dynamic Huffman codes */
+};
+
+/** Compression flush flags */
+enum rte_comp_flush_flag {
+	RTE_COMP_FLUSH_NONE,
+	/**< Data is not flushed. Output may remain in the compressor and be
+	 * processed during a following op. It may not be possible to decompress
+	 * output until a later op with some other flush flag has been sent.
+	 */
+	RTE_COMP_FLUSH_SYNC,
+	/**< All data should be flushed to output buffer. Output data can be
+	 * decompressed. However state and history is not cleared, so future
+	 * operations may use history from this operation.
+	 */
+	RTE_COMP_FLUSH_FULL,
+	/**< All data should be flushed to output buffer. Output data can be
+	 * decompressed. State and history data is cleared, so future
+	 * ops will be independent of ops processed before this.
+	 */
+	RTE_COMP_FLUSH_FINAL
+	/**< Same as RTE_COMP_FLUSH_FULL but if op.algo is RTE_COMP_ALGO_DEFLATE
+	 * then bfinal bit is set in the last block.
+	 */
+};
+
+/** Compression transform types */
+enum rte_comp_xform_type {
+	RTE_COMP_COMPRESS,
+	/**< Compression service - compress */
+	RTE_COMP_DECOMPRESS,
+	/**< Compression service - decompress */
+};
+
+/** Compression operation type */
+enum rte_comp_op_type {
+	RTE_COMP_OP_STATELESS,
+	/**< All data to be processed is submitted in the op, no state or
+	 * history from previous ops is used and none will be stored for future
+	 * ops. Flush flag must be set to either FLUSH_FULL or FLUSH_FINAL.
+	 */
+	RTE_COMP_OP_STATEFUL
+	/**< There may be more data to be processed after this op, it's part of
+	 * a stream of data. State and history from previous ops can be used
+	 * and resulting state and history can be stored for future ops,
+	 * depending on flush flag.
+	 */
+};
+
+
+/** Parameters specific to the deflate algorithm */
+struct rte_comp_deflate_params {
+	enum rte_comp_huffman huffman;
+	/**< Compression huffman encoding type */
+};
+
+/** Setup Data for compression */
+struct rte_comp_compress_xform {
+	enum rte_comp_algorithm algo;
+	/**< Algorithm to use for compress operation */
+	union {
+		struct rte_comp_deflate_params deflate;
+		/**< Parameters specific to the deflate algorithm */
+	}; /**< Algorithm specific parameters */
+	int level;
+	/**< Compression level */
+	uint8_t window_size;
+	/**< Base two log value of sliding window to be used. If window size
+	 * can't be supported by the PMD then it may fall back to a smaller
+	 * size. This is likely to result in a worse compression ratio.
+	 */
+	enum rte_comp_checksum_type chksum;
+	/**< Type of checksum to generate on the uncompressed data */
+	enum rte_comp_hash_algorithm hash_algo;
+	/**< Hash algorithm to be used with compress operation. Hash is always
+	 * done on plaintext.
+	 */
+};
+
+/**
+ * Setup Data for decompression.
+ */
+struct rte_comp_decompress_xform {
+	enum rte_comp_algorithm algo;
+	/**< Algorithm to use for decompression */
+	enum rte_comp_checksum_type chksum;
+	/**< Type of checksum to generate on the decompressed data */
+	uint8_t window_size;
+	/**< Base two log value of sliding window which was used to generate
+	 * compressed data. If window size can't be supported by the PMD then
+	 * setup of stream or private_xform should fail.
+	 */
+	enum rte_comp_hash_algorithm hash_algo;
+	/**< Hash algorithm to be used with decompress operation. Hash is always
+	 * done on plaintext.
+	 */
+};
+
+/**
+ * Compression transform structure.
+ *
+ * This is used to specify the compression transforms required.
+ * Each transform structure can hold a single transform, the type field is
+ * used to specify which transform is contained within the union.
+ */
+struct rte_comp_xform {
+	enum rte_comp_xform_type type;
+	/**< xform type */
+	union {
+		struct rte_comp_compress_xform compress;
+		/**< xform for compress operation */
+		struct rte_comp_decompress_xform decompress;
+		/**< decompress xform */
+	};
+};
+
+/**
+ * Compression Operation.
+ *
+ * This structure contains data relating to performing a compression
+ * operation on the referenced mbuf data buffers.
+ *
+ * Comp operations are enqueued and dequeued in comp PMDs using the
+ * rte_compressdev_enqueue_burst() / rte_compressdev_dequeue_burst() APIs
+ */
+struct rte_comp_op {
+	enum rte_comp_op_type op_type;
+	union {
+		void *private_xform;
+		/**< Stateless private PMD data derived from an rte_comp_xform.
+		 * A handle returned by rte_compressdev_private_xform_create()
+		 * must be attached to operations of op_type RTE_COMP_STATELESS.
+		 */
+		void *stream;
+		/**< Private PMD data derived initially from an rte_comp_xform,
+		 * which holds state and history data and evolves as operations
+		 * are processed. rte_compressdev_stream_create() must be called
+		 * on a device for all STATEFUL data streams and the resulting
+		 * stream attached to the one or more operations associated
+		 * with the data stream.
+		 * All operations in a stream must be sent to the same device.
+		 */
+	};
+
+	struct rte_mempool *mempool;
+	/**< Pool from which operation is allocated */
+	rte_iova_t iova_addr;
+	/**< IOVA address of this operation */
+	struct rte_mbuf *m_src;
+	/**< source mbuf
+	 * The total size of the input buffer(s) can be retrieved using
+	 * rte_pktmbuf_data_len(m_src). The max data size which can fit in a
+	 * single mbuf is limited by the uint16_t rte_mbuf.data_len to 64k-1.
+	 * If the input data is bigger than this it can be passed to the PMD in
+	 * a chain of mbufs if the PMD's capabilities indicate it supports this.
+	 */
+	struct rte_mbuf *m_dst;
+	/**< destination mbuf
+	 * The total size of the output buffer(s) can be retrieved using
+	 * rte_pktmbuf_data_len(m_dst). The max data size which can fit in a
+	 * single mbuf is limited by the uint16_t rte_mbuf.data_len to 64k-1.
+	 * If the output data is expected to be bigger than this a chain of
+	 * mbufs can be passed to the PMD if the PMD's capabilities indicate
+	 * it supports this.
+	 */
+
+	struct {
+		uint32_t offset;
+		/**< Starting point for compression or decompression,
+		 * specified as number of bytes from start of packet in
+		 * source buffer.
+		 * This offset starts from the first segment
+		 * of the buffer, in case the m_src is a chain of mbufs.
+		 * Starting point for checksum generation in compress direction.
+		 */
+		uint32_t length;
+		/**< The length, in bytes, of the data in source buffer
+		 * to be compressed or decompressed.
+		 * Also the length of the data over which the checksum
+		 * should be generated in compress direction
+		 */
+	} src;
+	struct {
+		uint32_t offset;
+		/**< Starting point for writing output data, specified as
+		 * number of bytes from start of packet in dest
+		 * buffer.
+		 * This offset starts from the first segment
+		 * of the buffer, in case the m_dst is a chain of mbufs.
+		 * Starting point for checksum generation in
+		 * decompress direction.
+		 */
+	} dst;
+	struct {
+		uint8_t *digest;
+		/**< Output buffer to store hash output, if enabled in xform.
+		 * Buffer would contain valid value only after an op with
+		 * flush flag = RTE_COMP_FLUSH_FULL/FLUSH_FINAL is processed
+		 * successfully.
+		 *
+		 * Length of buffer should be contiguous and large enough to
+		 * accommodate digest produced by specific hash algo.
+		 */
+		rte_iova_t iova_addr;
+		/**< IO address of the buffer */
+	} hash;
+	enum rte_comp_flush_flag flush_flag;
+	/**< Defines flush characteristics for the output data.
+	 * Only applicable in compress direction
+	 */
+	uint64_t input_chksum;
+	/**< An input checksum can be provided to generate a
+	 * cumulative checksum across sequential blocks in a STATELESS stream.
+	 * Checksum type is as specified in xform chksum_type
+	 */
+	uint64_t output_chksum;
+	/**< If a checksum is generated it will be written in here.
+	 * Checksum type is as specified in xform chksum_type.
+	 */
+	uint32_t consumed;
+	/**< The number of bytes from the source buffer
+	 * which were compressed/decompressed.
+	 */
+	uint32_t produced;
+	/**< The number of bytes written to the destination buffer
+	 * which were compressed/decompressed.
+	 */
+	uint64_t debug_status;
+	/**<
+	 * Status of the operation is returned in the status param.
+	 * This field allows the PMD to pass back extra
+	 * pmd-specific debug information. Value is not defined on the API.
+	 */
+	uint8_t status;
+	/**<
+	 * Operation status - use values from enum rte_comp_status.
+	 * This is reset to
+	 * RTE_COMP_OP_STATUS_NOT_PROCESSED on allocation from mempool and
+	 * will be set to RTE_COMP_OP_STATUS_SUCCESS after operation
+	 * is successfully processed by a PMD
+	 */
+} __rte_cache_aligned;
+
+/**
+ * Creates an operation pool
+ *
+ * @param name
+ *   Compress pool name
+ * @param nb_elts
+ *   Number of elements in pool
+ * @param cache_size
+ *   Number of elements to cache on lcore, see
+ *   *rte_mempool_create* for further details about cache size
+ * @param user_size
+ *   Size of private data to allocate for user with each operation
+ * @param socket_id
+ *   Socket to identifier allocate memory on
+ * @return
+ *  - On success pointer to mempool
+ *  - On failure NULL
+ */
+struct rte_mempool * __rte_experimental
+rte_comp_op_pool_create(const char *name,
+		unsigned int nb_elts, unsigned int cache_size,
+		uint16_t user_size, int socket_id);
+
+/**
+ * Allocate an operation from a mempool with default parameters set
+ *
+ * @param mempool
+ *   Compress operation mempool
+ *
+ * @return
+ * - On success returns a valid rte_comp_op structure
+ * - On failure returns NULL
+ */
+struct rte_comp_op * __rte_experimental
+rte_comp_op_alloc(struct rte_mempool *mempool);
+
+/**
+ * Bulk allocate operations from a mempool with default parameters set
+ *
+ * @param mempool
+ *   Compress operation mempool
+ * @param ops
+ *   Array to place allocated operations
+ * @param nb_ops
+ *   Number of operations to allocate
+ * @return
+ *   - 0: Success
+ *   - -ENOENT: Not enough entries in the mempool; no ops are retrieved.
+ */
+int __rte_experimental
+rte_comp_op_bulk_alloc(struct rte_mempool *mempool,
+		struct rte_comp_op **ops, uint16_t nb_ops);
+
+/**
+ * Free operation structure
+ * If operation has been allocate from a rte_mempool, then the operation will
+ * be returned to the mempool.
+ *
+ * @param op
+ *   Compress operation
+ */
+void __rte_experimental
+rte_comp_op_free(struct rte_comp_op *op);
+
+/**
+ * Get the name of a compress service feature flag
+ *
+ * @param flag
+ *   The mask describing the flag
+ *
+ * @return
+ *   The name of this flag, or NULL if it's not a valid feature flag.
+ */
+const char * __rte_experimental
+rte_comp_get_feature_name(uint64_t flag);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _RTE_COMP_H_ */