[dpdk-dev] [PATCH 1/3] compress/isal: enable checksum support in driver

Lee Daly lee.daly at intel.com
Tue Oct 9 18:21:47 CEST 2018


This patch adds checksum support in the ISA-L  PMD for both compression
and decompression.
CRC32 is supported as well as Adler32.

Signed-off-by: Lee Daly <lee.daly at intel.com>
---
 drivers/compress/isal/isal_compress_pmd.c     | 82 +++++++++++++++++++++++----
 drivers/compress/isal/isal_compress_pmd_ops.c |  4 +-
 2 files changed, 73 insertions(+), 13 deletions(-)

diff --git a/drivers/compress/isal/isal_compress_pmd.c b/drivers/compress/isal/isal_compress_pmd.c
index e943336..e377417 100644
--- a/drivers/compress/isal/isal_compress_pmd.c
+++ b/drivers/compress/isal/isal_compress_pmd.c
@@ -16,8 +16,11 @@
 #define RTE_COMP_ISAL_LEVEL_ONE 1
 #define RTE_COMP_ISAL_LEVEL_TWO 2
 #define RTE_COMP_ISAL_LEVEL_THREE 3 /* Optimised for AVX512 & AVX2 only */
+#define RTE_COMP_ISAL_CRC_SIZE 8
+#define RTE_COMP_ISAL_ADLER_SIZE 4
 
 int isal_logtype_driver;
+uint8_t checksum_size;
 
 /* Verify and set private xform parameters */
 int
@@ -43,12 +46,6 @@ isal_comp_set_priv_xform_parameters(struct isal_priv_xform *priv_xform,
 		}
 		priv_xform->compress.algo = RTE_COMP_ALGO_DEFLATE;
 
-		/* Set private xform checksum - raw deflate by default */
-		if (xform->compress.chksum != RTE_COMP_CHECKSUM_NONE) {
-			ISAL_PMD_LOG(ERR, "Checksum not supported\n");
-			return -ENOTSUP;
-		}
-
 		/* Set private xform window size, 32K supported */
 		if (xform->compress.window_size == RTE_COMP_ISAL_WINDOW_SIZE)
 			priv_xform->compress.window_size =
@@ -77,6 +74,29 @@ isal_comp_set_priv_xform_parameters(struct isal_priv_xform *priv_xform,
 			return -ENOTSUP;
 		}
 
+		/* Set private xform checksum */
+		switch (xform->compress.chksum) {
+		/* Raw deflate by default */
+		case(RTE_COMP_CHECKSUM_NONE):
+			priv_xform->compress.chksum = IGZIP_DEFLATE;
+			break;
+		case(RTE_COMP_CHECKSUM_CRC32):
+			priv_xform->compress.chksum = IGZIP_GZIP_NO_HDR;
+			checksum_size = RTE_COMP_ISAL_CRC_SIZE;
+			break;
+		case(RTE_COMP_CHECKSUM_ADLER32):
+			priv_xform->compress.chksum = IGZIP_ZLIB_NO_HDR;
+			checksum_size = RTE_COMP_ISAL_ADLER_SIZE;
+			break;
+		case(RTE_COMP_CHECKSUM_CRC32_ADLER32):
+			ISAL_PMD_LOG(ERR, "Combined CRC and ADLER checksum not"
+					" supported\n");
+			return -ENOTSUP;
+		default:
+			ISAL_PMD_LOG(ERR, "Checksum type not supported\n");
+			return -ENOTSUP;
+		}
+
 		/* Set private xform level.
 		 * Checking compliance with compressdev API, -1 <= level => 9
 		 */
@@ -170,9 +190,26 @@ isal_comp_set_priv_xform_parameters(struct isal_priv_xform *priv_xform,
 		}
 		priv_xform->decompress.algo = RTE_COMP_ALGO_DEFLATE;
 
-		/* Set private xform checksum - raw deflate by default */
-		if (xform->compress.chksum != RTE_COMP_CHECKSUM_NONE) {
-			ISAL_PMD_LOG(ERR, "Checksum not supported\n");
+		/* Set private xform checksum */
+		switch (xform->decompress.chksum) {
+		/* Raw deflate by default */
+		case(RTE_COMP_CHECKSUM_NONE):
+			priv_xform->decompress.chksum = ISAL_DEFLATE;
+			break;
+		case(RTE_COMP_CHECKSUM_CRC32):
+			priv_xform->decompress.chksum = ISAL_GZIP_NO_HDR;
+			checksum_size = RTE_COMP_ISAL_CRC_SIZE;
+			break;
+		case(RTE_COMP_CHECKSUM_ADLER32):
+			priv_xform->decompress.chksum = ISAL_ZLIB_NO_HDR;
+			checksum_size = RTE_COMP_ISAL_ADLER_SIZE;
+			break;
+		case(RTE_COMP_CHECKSUM_CRC32_ADLER32):
+			ISAL_PMD_LOG(ERR, "Combined CRC and ADLER checksum not"
+					" supported\n");
+			return -ENOTSUP;
+		default:
+			ISAL_PMD_LOG(ERR, "Checksum type not supported\n");
 			return -ENOTSUP;
 		}
 
@@ -377,6 +414,9 @@ process_isal_deflate(struct rte_comp_op *op, struct isal_comp_qp *qp,
 
 	qp->stream->level_buf = temp_level_buf;
 
+	/* Set Checksum flag */
+	qp->stream->gzip_flag = priv_xform->compress.chksum;
+
 	/* Stateless operation, input will be consumed in one go */
 	qp->stream->flush = NO_FLUSH;
 
@@ -461,14 +501,25 @@ process_isal_deflate(struct rte_comp_op *op, struct isal_comp_qp *qp,
 		}
 	}
 		op->consumed = qp->stream->total_in;
-		op->produced = qp->stream->total_out;
+		/* If checksum requested, total_out must be adjusted
+		 * to reflect only compressed data.
+		 */
+		op->produced = qp->stream->gzip_flag == IGZIP_DEFLATE ?
+				qp->stream->total_out :
+				qp->stream->total_out - checksum_size;
+
+		op->output_chksum = (qp->stream->gzip_flag == IGZIP_ZLIB_NO_HDR)
+				? qp->stream->internal_state.crc + 1
+				: qp->stream->internal_state.crc;
+		isal_deflate_reset(qp->stream);
 
 	return ret;
 }
 
 /* Stateless Decompression Function */
 static int
-process_isal_inflate(struct rte_comp_op *op, struct isal_comp_qp *qp)
+process_isal_inflate(struct rte_comp_op *op, struct isal_comp_qp *qp,
+		struct isal_priv_xform *priv_xform)
 {
 	int ret = 0;
 
@@ -477,6 +528,9 @@ process_isal_inflate(struct rte_comp_op *op, struct isal_comp_qp *qp)
 	/* Initialize decompression state */
 	isal_inflate_init(qp->state);
 
+	/* Set Checksum flag */
+	qp->state->crc_flag = priv_xform->decompress.chksum;
+
 	if (op->m_src->pkt_len < (op->src.length + op->src.offset)) {
 		ISAL_PMD_LOG(ERR, "Input mbuf(s) not big enough.\n");
 		op->status = RTE_COMP_OP_STATUS_INVALID_ARGS;
@@ -538,6 +592,10 @@ process_isal_inflate(struct rte_comp_op *op, struct isal_comp_qp *qp)
 		op->consumed = op->src.length - qp->state->avail_in;
 	}
 		op->produced = qp->state->total_out;
+		op->output_chksum = qp->state->crc;
+
+		isal_inflate_reset(qp->state);
+
 
 	return ret;
 }
@@ -552,7 +610,7 @@ 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);
+		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 41cade8..7b91849 100644
--- a/drivers/compress/isal/isal_compress_pmd_ops.c
+++ b/drivers/compress/isal/isal_compress_pmd_ops.c
@@ -17,7 +17,9 @@ static const struct rte_compressdev_capabilities isal_pmd_capabilities[] = {
 					RTE_COMP_FF_OOP_LB_IN_SGL_OUT |
 					RTE_COMP_FF_SHAREABLE_PRIV_XFORM |
 					RTE_COMP_FF_HUFFMAN_FIXED |
-					RTE_COMP_FF_HUFFMAN_DYNAMIC,
+					RTE_COMP_FF_HUFFMAN_DYNAMIC |
+					RTE_COMP_FF_CRC32_CHECKSUM |
+					RTE_COMP_FF_ADLER32_CHECKSUM,
 		.window_size = {
 			.min = 15,
 			.max = 15,
-- 
2.7.4



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