compress/isal: add ISA-L compression functionality

Adds compression functionality, this sets internal ISA-L
structures, provides input & output mbuf addresses,
executes compression, which ISA-L calls deflate,
and finally error checks.

Signed-off-by: Lee Daly <lee.daly@intel.com>
Acked-by: Greg Tucker <greg.b.tucker@intel.com>
Reviewed-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>

drivers/compress/isal/isal_compress_pmd.c

@@ -6,6 +6,7 @@
 #include <rte_bus_vdev.h>
 #include <rte_common.h>
 #include <rte_malloc.h>
+#include <rte_mbuf.h>
 #include <rte_compressdev_pmd.h>
 
 #include "isal_compress_pmd_private.h"
@@ -187,14 +188,92 @@ isal_comp_set_priv_xform_parameters(struct isal_priv_xform *priv_xform,
 	return 0;
 }
 
+/* Stateless Compression Function */
+static int
+process_isal_deflate(struct rte_comp_op *op, struct isal_comp_qp *qp,
+		struct isal_priv_xform *priv_xform)
+{
+	int ret = 0;
+	op->status = RTE_COMP_OP_STATUS_SUCCESS;
+
+	/* Required due to init clearing level_buf */
+	uint8_t *temp_level_buf = qp->stream->level_buf;
+
+	/* Initialize compression stream */
+	isal_deflate_stateless_init(qp->stream);
+
+	qp->stream->level_buf = temp_level_buf;
+
+	/* Stateless operation, input will be consumed in one go */
+	qp->stream->flush = NO_FLUSH;
+
+	/* set op level & intermediate level buffer */
+	qp->stream->level = priv_xform->compress.level;
+	qp->stream->level_buf_size = priv_xform->level_buffer_size;
+
+	/* Point compression stream structure to input/output buffers */
+	qp->stream->avail_in = op->src.length;
+	qp->stream->next_in = rte_pktmbuf_mtod(op->m_src, uint8_t *);
+	qp->stream->avail_out = op->m_dst->data_len;
+	qp->stream->next_out  = rte_pktmbuf_mtod(op->m_dst, uint8_t *);
+	qp->stream->end_of_stream = 1; /* All input consumed in one go */
+
+	if (unlikely(!qp->stream->next_in || !qp->stream->next_out)) {
+		ISAL_PMD_LOG(ERR, "Invalid source or destination buffers\n");
+		op->status = RTE_COMP_OP_STATUS_INVALID_ARGS;
+		return -1;
+	}
+
+	/* Set op huffman code */
+	if (priv_xform->compress.deflate.huffman == RTE_COMP_HUFFMAN_FIXED)
+		isal_deflate_set_hufftables(qp->stream, NULL,
+				IGZIP_HUFFTABLE_STATIC);
+	else if (priv_xform->compress.deflate.huffman ==
+			RTE_COMP_HUFFMAN_DEFAULT)
+		isal_deflate_set_hufftables(qp->stream, NULL,
+			IGZIP_HUFFTABLE_DEFAULT);
+	/* Dynamically change the huffman code to suit the input data */
+	else if (priv_xform->compress.deflate.huffman ==
+			RTE_COMP_HUFFMAN_DYNAMIC)
+		isal_deflate_set_hufftables(qp->stream, NULL,
+				IGZIP_HUFFTABLE_DEFAULT);
+
+	/* Execute compression operation */
+	ret =  isal_deflate_stateless(qp->stream);
+
+	/* Check that output buffer did not run out of space */
+	if (ret == STATELESS_OVERFLOW) {
+		ISAL_PMD_LOG(ERR, "Output buffer not big enough\n");
+		op->status = RTE_COMP_OP_STATUS_OUT_OF_SPACE_TERMINATED;
+		return ret;
+	}
+
+	/* Check that input buffer has been fully consumed */
+	if (qp->stream->avail_in != (uint32_t)0) {
+		ISAL_PMD_LOG(ERR, "Input buffer could not be read entirely\n");
+		op->status = RTE_COMP_OP_STATUS_ERROR;
+		return -1;
+	}
+
+	if (ret != COMP_OK) {
+		op->status = RTE_COMP_OP_STATUS_ERROR;
+		return ret;
+	}
+
+	op->consumed = qp->stream->total_in;
+	op->produced = qp->stream->total_out;
+
+	return ret;
+}
+
 /* Process compression/decompression operation */
 static int
-process_op(struct isal_comp_qp *qp __rte_unused,
-		struct rte_comp_op *op __rte_unused,
+process_op(struct isal_comp_qp *qp, struct rte_comp_op *op,
 		struct isal_priv_xform *priv_xform)
 {
 	switch (priv_xform->type) {
 	case RTE_COMP_COMPRESS:
+		process_isal_deflate(op, qp, priv_xform);
 		break;
 	case RTE_COMP_DECOMPRESS:
 		break;

drivers/compress/isal/isal_compress_pmd_ops.c

@@ -1,6 +1,7 @@
 /* SPDX-License-Identifier: BSD-3-Clause
  * Copyright(c) 2018 Intel Corporation
  */
+#include <isa-l.h>
 
 #include <rte_common.h>
 #include <rte_compressdev_pmd.h>
@@ -9,6 +10,15 @@
 #include "isal_compress_pmd_private.h"
 
 static const struct rte_compressdev_capabilities isal_pmd_capabilities[] = {
+	{
+		.algo = RTE_COMP_ALGO_DEFLATE,
+		.comp_feature_flags =	RTE_COMP_FF_SHAREABLE_PRIV_XFORM,
+		.window_size = {
+			.min = 15,
+			.max = 15,
+			.increment = 0
+		},
+	},
 	RTE_COMP_END_OF_CAPABILITIES_LIST()
 };
 
@@ -146,6 +156,12 @@ isal_comp_pmd_qp_release(struct rte_compressdev *dev, uint16_t qp_id)
 	if (qp == NULL)
 		return -EINVAL;
 
+	if (qp->stream != NULL)
+		rte_free(qp->stream);
+
+	if (qp->stream->level_buf != NULL)
+		rte_free(qp->stream->level_buf);
+
 	if (dev->data->queue_pairs[qp_id] != NULL)
 		rte_free(dev->data->queue_pairs[qp_id]);
 
@@ -214,6 +230,16 @@ isal_comp_pmd_qp_setup(struct rte_compressdev *dev, uint16_t qp_id,
 		return (-ENOMEM);
 	}
 
+	/* Initialize memory for compression stream structure */
+	qp->stream = rte_zmalloc_socket("Isa-l compression stream ",
+			sizeof(struct isal_zstream),  RTE_CACHE_LINE_SIZE,
+			socket_id);
+
+	/* Initialize memory for compression level buffer */
+	qp->stream->level_buf = rte_zmalloc_socket("Isa-l compression lev_buf",
+			ISAL_DEF_LVL3_DEFAULT, RTE_CACHE_LINE_SIZE,
+			socket_id);
+
 	qp->id = qp_id;
 	dev->data->queue_pairs[qp_id] = qp;
 

drivers/compress/isal/isal_compress_pmd_private.h

@@ -28,6 +28,8 @@ struct isal_comp_qp {
 	struct rte_ring *processed_pkts;
 	/* Queue pair statistics */
 	struct rte_compressdev_stats qp_stats;
+	/* Compression stream information*/
+	struct isal_zstream *stream;
 	/* Number of free elements on ring */
 	uint16_t num_free_elements;
 } __rte_cache_aligned;