[dpdk-dev] [PATCH 2/7] net/bnxt: fix ring alignment for thor-based adapters

[Lance Richardson]

When using transmit/receive queue sizes smaller than 256, alignment
requirements are not being met for Thor-based adapters. Fix by
forcing memory addresses used for transmit/receive/aggregation ring
allocations to be on 4K boundaries.

Fixes: f8168ca0e690 ("net/bnxt: support thor controller")
Signed-off-by: Lance Richardson <lance.richard...@broadcom.com>
Reviewed-by: Ajit Kumar Khaparde <ajit.khapa...@broadcom.com>
---
 drivers/net/bnxt/bnxt_ring.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/bnxt/bnxt_ring.c b/drivers/net/bnxt/bnxt_ring.c
index ec17783cf..bc8b92b04 100644
--- a/drivers/net/bnxt/bnxt_ring.c
+++ b/drivers/net/bnxt/bnxt_ring.c
@@ -162,18 +162,21 @@ int bnxt_alloc_rings(struct bnxt *bp, uint16_t qidx,
        int nq_ring_len = BNXT_CHIP_THOR(bp) ? cp_ring_len : 0;
 
        int tx_ring_start = nq_ring_start + nq_ring_len;
+       tx_ring_start = RTE_ALIGN(tx_ring_start, 4096);
        int tx_ring_len = tx_ring_info ?
            RTE_CACHE_LINE_ROUNDUP(tx_ring_info->tx_ring_struct->ring_size *
                                   sizeof(struct tx_bd_long)) : 0;
        tx_ring_len = RTE_ALIGN(tx_ring_len, 4096);
 
        int rx_ring_start = tx_ring_start + tx_ring_len;
+       rx_ring_start = RTE_ALIGN(rx_ring_start, 4096);
        int rx_ring_len =  rx_ring_info ?
                RTE_CACHE_LINE_ROUNDUP(rx_ring_info->rx_ring_struct->ring_size *
                sizeof(struct rx_prod_pkt_bd)) : 0;
        rx_ring_len = RTE_ALIGN(rx_ring_len, 4096);
 
        int ag_ring_start = rx_ring_start + rx_ring_len;
+       ag_ring_start = RTE_ALIGN(ag_ring_start, 4096);
        int ag_ring_len = rx_ring_len * AGG_RING_SIZE_FACTOR;
        ag_ring_len = RTE_ALIGN(ag_ring_len, 4096);
 
-- 
2.17.1