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compress/isal: add ISA-L decomp functionality

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Adds decompression functionality, similar to compression,
this sets internal ISA-L structures, provides input & output mbuf
addresses, executes decompression, which ISA-L calls inflate 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>
This commit is contained in:
Lee Daly 2018-05-09 17:14:34 +01:00 committed by Pablo de Lara
parent dc49e6aa48
commit 7bf4f0630a
3 changed files with 61 additions and 0 deletions
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51
drivers/compress/isal/isal_compress_pmd.c
View File

@ -266,6 +266,56 @@ process_isal_deflate(struct rte_comp_op *op, struct isal_comp_qp *qp,
return ret;
}
/* Stateless Decompression Function */
static int
process_isal_inflate(struct rte_comp_op *op, struct isal_comp_qp *qp)
{
int ret = 0;
op->status = RTE_COMP_OP_STATUS_SUCCESS;
/* Initialize decompression state */
isal_inflate_init(qp->state);
/* Point decompression state structure to input/output buffers */
qp->state->avail_in = op->src.length;
qp->state->next_in = rte_pktmbuf_mtod(op->m_src, uint8_t *);
qp->state->avail_out = op->m_dst->data_len;
qp->state->next_out = rte_pktmbuf_mtod(op->m_dst, uint8_t *);
if (unlikely(!qp->state->next_in || !qp->state->next_out)) {
ISAL_PMD_LOG(ERR, "Invalid source or destination buffers\n");
op->status = RTE_COMP_OP_STATUS_INVALID_ARGS;
return -1;
}
/* Execute decompression operation */
ret = isal_inflate_stateless(qp->state);
if (ret == ISAL_OUT_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->state->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 != ISAL_DECOMP_OK) {
op->status = RTE_COMP_OP_STATUS_ERROR;
return ret;
}
op->consumed = op->src.length - qp->state->avail_in;
op->produced = qp->state->total_out;
return ret;
}
/* Process compression/decompression operation */
static int
process_op(struct isal_comp_qp *qp, struct rte_comp_op *op,
@ -276,6 +326,7 @@ process_op(struct isal_comp_qp *qp, struct rte_comp_op *op,
process_isal_deflate(op, qp, priv_xform);
break;
case RTE_COMP_DECOMPRESS:
process_isal_inflate(op, qp);
break;
default:
ISAL_PMD_LOG(ERR, "Operation Not Supported\n");

8
drivers/compress/isal/isal_compress_pmd_ops.c
View File

@ -162,6 +162,9 @@ isal_comp_pmd_qp_release(struct rte_compressdev *dev, uint16_t qp_id)
if (qp->stream->level_buf != NULL)
rte_free(qp->stream->level_buf);
if (qp->state != NULL)
rte_free(qp->state);
if (dev->data->queue_pairs[qp_id] != NULL)
rte_free(dev->data->queue_pairs[qp_id]);
@ -240,6 +243,11 @@ isal_comp_pmd_qp_setup(struct rte_compressdev *dev, uint16_t qp_id,
ISAL_DEF_LVL3_DEFAULT, RTE_CACHE_LINE_SIZE,
socket_id);
/* Initialize memory for decompression state structure */
qp->state = rte_zmalloc_socket("Isa-l decompression state",
sizeof(struct inflate_state), RTE_CACHE_LINE_SIZE,
socket_id);
qp->id = qp_id;
dev->data->queue_pairs[qp_id] = qp;

2
drivers/compress/isal/isal_compress_pmd_private.h
View File

@ -30,6 +30,8 @@ struct isal_comp_qp {
struct rte_compressdev_stats qp_stats;
/* Compression stream information*/
struct isal_zstream *stream;
/* Decompression state information*/
struct inflate_state *state;
/* Number of free elements on ring */
uint16_t num_free_elements;
} __rte_cache_aligned;