>
> 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.d...@intel.com>
Acked-by: Greg Tucker <greg.b.tuc...@intel.com>
> ---
> drivers/compress/isal/isal_compress_pmd.c | 83
> ++++++++++++++++++++++-
> drivers/compress/isal/isal_compress_pmd_ops.c | 26 +++++++
> drivers/compress/isal/isal_compress_pmd_private.h | 2 +
> 3 files changed, 109 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/compress/isal/isal_compress_pmd.c
> b/drivers/compress/isal/isal_compress_pmd.c
> index aaa0593..dbdee39 100644
> --- a/drivers/compress/isal/isal_compress_pmd.c
> +++ b/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;
> +}
> +
--snip--
