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.d...@intel.com>
---
drivers/compress/isal/isal_compress_pmd.c | 55 +++++++++++++++++++++++
drivers/compress/isal/isal_compress_pmd_ops.c | 8 ++++
drivers/compress/isal/isal_compress_pmd_private.h | 2 +
3 files changed, 65 insertions(+)
diff --git a/drivers/compress/isal/isal_compress_pmd.c
b/drivers/compress/isal/isal_compress_pmd.c
index e09fd3f..d52b076 100644
--- a/drivers/compress/isal/isal_compress_pmd.c
+++ b/drivers/compress/isal/isal_compress_pmd.c
@@ -297,6 +297,60 @@ 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,
+ struct isal_priv_xform *priv_xform)
+{
+ int ret = 0;
+
+ op->status = RTE_COMP_OP_STATUS_SUCCESS;
+
+ /* Initialize decompression state */
+ isal_inflate_init(qp->state);
+
+ /* Set op checksum, none by default */
+ qp->state->crc_flag = priv_xform->decompress.chksum;
+
+ /* 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,
@@ -307,6 +361,7 @@ 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, priv_xform);
break;
default:
ISAL_PMD_LOG(ERR, "Operation Not Supported\n");
diff --git a/drivers/compress/isal/isal_compress_pmd_ops.c
b/drivers/compress/isal/isal_compress_pmd_ops.c
index a72a886..e8c5298 100644
--- a/drivers/compress/isal/isal_compress_pmd_ops.c
+++ b/drivers/compress/isal/isal_compress_pmd_ops.c
@@ -164,6 +164,9 @@ 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]);
@@ -242,6 +245,11 @@ 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;
diff --git a/drivers/compress/isal/isal_compress_pmd_private.h
b/drivers/compress/isal/isal_compress_pmd_private.h
index 6ba34a6..46e9fcf 100644
--- a/drivers/compress/isal/isal_compress_pmd_private.h
+++ b/drivers/compress/isal/isal_compress_pmd_private.h
@@ -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;
--
2.7.4
