net/mana: implement RX CQE coalescing

From: Long Li <[email protected]>

With RX coalescing, one CQE entry can be used to indicate up to 4 packets on the receive queue. This saves processing time and PCI bandwidth over the CQ.

---
 drivers/net/mana/mana.h |  4 +++
 drivers/net/mana/rx.c   | 71 ++++++++++++++++++++++++++++++++++-------
 2 files changed, 64 insertions(+), 11 deletions(-)

index be88537f1a..dfeda531eb 100644
@@ -429,6 +429,10 @@ struct mana_rxq {
 	struct mana_gdma_queue gdma_cq;
 	struct gdma_comp *gdma_comp_buf;
 
+	uint32_t comp_buf_len;
+	uint32_t comp_buf_idx;
+	uint32_t backlog_idx;
+
 	struct mana_stats stats;
 	struct mana_mr_btree mr_btree;
 

2.34.1

Applied to dpdk-next-net/main, thanks.

Dropped stable tag in next-net, can add back again based on discussion with LTS maintainers.

Backport to stable tree is requested but this is not a fix patch, cc'ed stable tree maintainers for comment.

stable tag removed while merging to next-net for now.