[PATCH v5 10/13] compressdev: add compression service feature flags

[Pablo de Lara <pablo.de.lara.guarch@intel.com>]

From: Fiona Trahe <fiona.trahe@intel.com>

Signed-off-by: Fiona Trahe <fiona.trahe@intel.com>
Signed-off-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
Signed-off-by: Shally Verma <shally.verma@caviumnetworks.com>
Signed-off-by: Ashish Gupta <ashish.gupta@caviumnetworks.com>
---
 lib/librte_compressdev/rte_comp.c                  | 31 +++++++++++++++
 lib/librte_compressdev/rte_comp.h                  | 46 ++++++++++++++++++++++
 lib/librte_compressdev/rte_compressdev_version.map |  1 +
 3 files changed, 78 insertions(+)

diff --git a/lib/librte_compressdev/rte_comp.c b/lib/librte_compressdev/rte_comp.c
index eb99e99d2..d596ba872 100644
--- a/lib/librte_compressdev/rte_comp.c
+++ b/lib/librte_compressdev/rte_comp.c
@@ -6,6 +6,37 @@
 #include "rte_compressdev.h"
 #include "rte_compressdev_internal.h"
 
+const char * __rte_experimental
+rte_comp_get_feature_name(uint64_t flag)
+{
+	switch (flag) {
+	case RTE_COMP_FF_STATEFUL_COMPRESSION:
+		return "STATEFUL_COMPRESSION";
+	case RTE_COMP_FF_STATEFUL_DECOMPRESSION:
+		return "STATEFUL_DECOMPRESSION";
+	case RTE_COMP_FF_MBUF_SCATTER_GATHER:
+		return "MBUF_SCATTER_GATHER";
+	case RTE_COMP_FF_MULTI_PKT_CHECKSUM:
+		return "MULTI_PKT_CHECKSUM";
+	case RTE_COMP_FF_ADLER32_CHECKSUM:
+		return "ADLER32_CHECKSUM";
+	case RTE_COMP_FF_CRC32_CHECKSUM:
+		return "CRC32_CHECKSUM";
+	case RTE_COMP_FF_CRC32_ADLER32_CHECKSUM:
+		return "CRC32_ADLER32_CHECKSUM";
+	case RTE_COMP_FF_NONCOMPRESSED_BLOCKS:
+		return "NONCOMPRESSED_BLOCKS";
+	case RTE_COMP_FF_SHA1_HASH:
+		return "SHA1_HASH";
+	case RTE_COMP_FF_SHA2_SHA256_HASH:
+		return "SHA2_SHA256_HASH";
+	case RTE_COMP_FF_SHAREABLE_PRIV_XFORM:
+		return "SHAREABLE_PRIV_XFORM";
+	default:
+		return NULL;
+	}
+}
+
 /**
  * Reset the fields of an operation to their default values.
  *
diff --git a/lib/librte_compressdev/rte_comp.h b/lib/librte_compressdev/rte_comp.h
index 639c577b6..870a5337e 100644
--- a/lib/librte_compressdev/rte_comp.h
+++ b/lib/librte_compressdev/rte_comp.h
@@ -19,6 +19,40 @@ extern "C" {
 #include <string.h>
 #include <rte_mempool.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_MBUF_SCATTER_GATHER		(1ULL << 2)
+/**< Scatter-gather mbufs are supported */
+#define RTE_COMP_FF_ADLER32_CHECKSUM		(1ULL << 3)
+/**< Adler-32 Checksum is supported */
+#define RTE_COMP_FF_CRC32_CHECKSUM		(1ULL << 4)
+/**< CRC32 Checksum is supported */
+#define RTE_COMP_FF_CRC32_ADLER32_CHECKSUM	(1ULL << 5)
+/**< Adler-32/CRC32 Checksum is supported */
+#define RTE_COMP_FF_MULTI_PKT_CHECKSUM		(1ULL << 6)
+/**< Generation of checksum across multiple stateless packets is supported */
+#define RTE_COMP_FF_SHA1_HASH			(1ULL << 7)
+/**< SHA1 Hash is supported */
+#define RTE_COMP_FF_SHA2_SHA256_HASH		(1ULL << 8)
+/**< SHA256 Hash of SHA2 family is supported */
+#define RTE_COMP_FF_NONCOMPRESSED_BLOCKS	(1ULL << 9)
+/**< Creation of non-compressed blocks using RTE_COMP_LEVEL_NONE is supported */
+#define RTE_COMP_FF_SHAREABLE_PRIV_XFORM	(1ULL << 10)
+/**< 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.
+ */
+
 /** Status of comp operation */
 enum rte_comp_op_status {
 	RTE_COMP_OP_STATUS_SUCCESS = 0,
@@ -411,6 +445,18 @@ rte_comp_op_bulk_alloc(struct rte_mempool *mempool,
 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
diff --git a/lib/librte_compressdev/rte_compressdev_version.map b/lib/librte_compressdev/rte_compressdev_version.map
index f9223bcfe..5ed3080b4 100644
--- a/lib/librte_compressdev/rte_compressdev_version.map
+++ b/lib/librte_compressdev/rte_compressdev_version.map
@@ -28,6 +28,7 @@ EXPERIMENTAL {
 	rte_compressdev_stop;
 	rte_compressdev_stream_create;
 	rte_compressdev_stream_free;
+	rte_comp_get_feature_name;
 	rte_comp_op_alloc;
 	rte_comp_op_bulk_alloc;
 	rte_comp_op_free;
-- 
2.14.3